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3c66d057 | 1 | |
dd11e0b7 | 2 | /* |
e2525655 | 3 | * $Id: client_side.cc,v 1.315 1998/05/27 18:35:22 wessels Exp $ |
dd11e0b7 | 4 | * |
5 | * DEBUG: section 33 Client-side Routines | |
6 | * AUTHOR: Duane Wessels | |
7 | * | |
42c04c16 | 8 | * SQUID Internet Object Cache http://squid.nlanr.net/Squid/ |
dd11e0b7 | 9 | * -------------------------------------------------------- |
10 | * | |
11 | * Squid is the result of efforts by numerous individuals from the | |
12 | * Internet community. Development is led by Duane Wessels of the | |
13 | * National Laboratory for Applied Network Research and funded by | |
14 | * the National Science Foundation. | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
25 | * | |
26 | * You should have received a copy of the GNU General Public License | |
27 | * along with this program; if not, write to the Free Software | |
28 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
29 | * | |
30 | */ | |
f88bb09c | 31 | |
32 | #include "squid.h" | |
33 | ||
5492ad1d | 34 | #if LINGERING_CLOSE |
35 | #define comm_close comm_lingering_close | |
36 | #endif | |
37 | ||
7a2f978b | 38 | static const char *const crlf = "\r\n"; |
cb69b4c7 | 39 | static const char *const proxy_auth_challenge = |
ee1679df | 40 | "Basic realm=\"Squid proxy-caching web server\""; |
7a2f978b | 41 | |
42 | #define REQUEST_BUF_SIZE 4096 | |
43 | #define FAILURE_MODE_TIME 300 | |
44 | ||
45 | /* Local functions */ | |
46 | ||
fc5d6f7f | 47 | static CWCB clientWriteComplete; |
7a2f978b | 48 | static PF clientReadRequest; |
49 | static PF connStateFree; | |
50 | static PF requestTimeout; | |
4b4cd312 | 51 | static void clientFinishIMS(clientHttpRequest * http); |
1b02b5be | 52 | static STCB clientGetHeadersForIMS; |
2920225f | 53 | static STCB clientGetHeadersForSpecialIMS; |
7a2f978b | 54 | static int CheckQuickAbort2(const clientHttpRequest *); |
1b02b5be | 55 | static int clientCheckTransferDone(clientHttpRequest *); |
7a2f978b | 56 | static void CheckQuickAbort(clientHttpRequest *); |
88aad2e5 | 57 | static void checkFailureRatio(err_type, hier_code); |
fb63215a | 58 | static void clientProcessMiss(clientHttpRequest *); |
7a2f978b | 59 | static void clientAppendReplyHeader(char *, const char *, size_t *, size_t); |
2334c194 | 60 | size_t clientBuildReplyHeader(clientHttpRequest *, char *, size_t, size_t *, char *, size_t); |
99edd1c3 | 61 | static clientHttpRequest *parseHttpRequestAbort(ConnStateData * conn, const char *uri); |
7a2f978b | 62 | static clientHttpRequest *parseHttpRequest(ConnStateData *, method_t *, int *, char **, size_t *); |
582b6456 | 63 | static RH clientRedirectDone; |
1b02b5be | 64 | static STCB clientHandleIMSReply; |
f5b8bbc4 | 65 | static int clientGetsOldEntry(StoreEntry * new, StoreEntry * old, request_t * request); |
66 | static int checkAccelOnly(clientHttpRequest *); | |
7c1d4010 | 67 | static int clientOnlyIfCached(clientHttpRequest * http); |
7a2f978b | 68 | static STCB clientSendMoreData; |
69 | static STCB clientCacheHit; | |
99edd1c3 | 70 | static void clientInterpretRequestHeaders(clientHttpRequest *); |
fb63215a | 71 | static void clientProcessRequest(clientHttpRequest *); |
72 | static void clientProcessExpired(void *data); | |
038eb4ed | 73 | static void clientProcessOnlyIfCachedMiss(clientHttpRequest * http); |
cb69b4c7 | 74 | static HttpReply *clientConstructProxyAuthReply(clientHttpRequest * http); |
50ddd7a4 | 75 | static int clientCachable(clientHttpRequest * http); |
76 | static int clientHierarchical(clientHttpRequest * http); | |
efb9218c | 77 | static int clientCheckContentLength(request_t * r); |
ea6f43cd | 78 | |
38d7734b | 79 | static int |
382d851a | 80 | checkAccelOnly(clientHttpRequest * http) |
38d7734b | 81 | { |
82 | /* return TRUE if someone makes a proxy request to us and | |
83 | * we are in httpd-accel only mode */ | |
f1dc9b30 | 84 | if (!Config2.Accel.on) |
38d7734b | 85 | return 0; |
17a0a4ee | 86 | if (Config.onoff.accel_with_proxy) |
38d7734b | 87 | return 0; |
382d851a | 88 | if (http->request->protocol == PROTO_CACHEOBJ) |
38d7734b | 89 | return 0; |
77ed547a | 90 | if (http->flags.accel) |
38d7734b | 91 | return 0; |
92 | return 1; | |
93 | } | |
94 | ||
b8d8561b | 95 | void |
382d851a | 96 | clientAccessCheck(void *data) |
f88bb09c | 97 | { |
382d851a | 98 | clientHttpRequest *http = data; |
99 | ConnStateData *conn = http->conn; | |
99edd1c3 | 100 | const char *browser; |
17a0a4ee | 101 | if (Config.onoff.ident_lookup && conn->ident.state == IDENT_NONE) { |
425ad52e | 102 | identStart(-1, conn, clientAccessCheck, http); |
ba1d2afa | 103 | return; |
104 | } | |
382d851a | 105 | if (checkAccelOnly(http)) { |
106 | clientAccessCheckDone(0, http); | |
75e88d56 | 107 | return; |
f88bb09c | 108 | } |
99edd1c3 | 109 | #if OLD_CODE |
f182d1c5 | 110 | browser = mime_get_header(http->request->headers, "User-Agent"); |
99edd1c3 | 111 | #else |
112 | browser = httpHeaderGetStr(&http->request->header, HDR_USER_AGENT); | |
113 | #endif | |
f1dc9b30 | 114 | http->acl_checklist = aclChecklistCreate(Config.accessList.http, |
382d851a | 115 | http->request, |
116 | conn->peer.sin_addr, | |
75e88d56 | 117 | browser, |
382d851a | 118 | conn->ident.ident); |
119 | aclNBCheck(http->acl_checklist, clientAccessCheckDone, http); | |
f88bb09c | 120 | } |
121 | ||
7c1d4010 | 122 | /* |
123 | * returns true if client specified that the object must come from the cache | |
124 | * witout contacting origin server | |
125 | */ | |
126 | static int | |
127 | clientOnlyIfCached(clientHttpRequest * http) | |
128 | { | |
129 | const request_t *r = http->request; | |
130 | assert(r); | |
ea285003 | 131 | return r->cache_control && |
8e092300 | 132 | EBIT_TEST(r->cache_control->mask, CC_ONLY_IF_CACHED); |
7c1d4010 | 133 | } |
134 | ||
cb69b4c7 | 135 | static HttpReply * |
ee1679df | 136 | clientConstructProxyAuthReply(clientHttpRequest * http) |
cb69b4c7 | 137 | { |
138 | ErrorState *err = errorCon(ERR_CACHE_ACCESS_DENIED, HTTP_PROXY_AUTHENTICATION_REQUIRED); | |
139 | HttpReply *rep; | |
140 | err->request = requestLink(http->request); | |
141 | rep = errorBuildReply(err); | |
142 | errorStateFree(err); | |
143 | /* add Authenticate header */ | |
038eb4ed | 144 | httpHeaderPutStr(&rep->header, HDR_PROXY_AUTHENTICATE, proxy_auth_challenge); |
cb69b4c7 | 145 | return rep; |
146 | } | |
fc5d6f7f | 147 | |
23d92c64 | 148 | StoreEntry * |
f44af445 | 149 | clientCreateStoreEntry(clientHttpRequest * h, method_t m, int flags) |
79e0dc20 | 150 | { |
151 | StoreEntry *e; | |
40defb17 | 152 | /* |
153 | * For erroneous requests, we might not have a h->request, | |
154 | * so make a fake one. | |
155 | */ | |
99edd1c3 | 156 | if (h->request == NULL) |
157 | h->request = requestLink(requestCreate(m, PROTO_NONE, NULL)); | |
23d92c64 | 158 | e = storeCreateEntry(h->uri, h->log_uri, flags, m); |
79e0dc20 | 159 | storeClientListAdd(e, h); |
7021844c | 160 | storeClientCopy(e, 0, 0, 4096, memAllocate(MEM_4K_BUF), clientSendMoreData, h); |
79e0dc20 | 161 | return e; |
162 | } | |
163 | ||
164 | ||
b8d8561b | 165 | void |
75e88d56 | 166 | clientAccessCheckDone(int answer, void *data) |
f88bb09c | 167 | { |
382d851a | 168 | clientHttpRequest *http = data; |
02922e76 | 169 | int page_id = -1; |
9b312a19 | 170 | ErrorState *err = NULL; |
1bea1d83 | 171 | HttpReply *rep; |
23d92c64 | 172 | debug(33, 5) ("clientAccessCheckDone: '%s' answer=%d\n", http->uri, answer); |
382d851a | 173 | http->acl_checklist = NULL; |
fc5d6f7f | 174 | if (answer == ACCESS_ALLOWED) { |
23d92c64 | 175 | urlCanonical(http->request, http->uri); |
ce66013b | 176 | assert(http->redirect_state == REDIRECT_NONE); |
382d851a | 177 | http->redirect_state = REDIRECT_PENDING; |
178 | redirectStart(http, clientRedirectDone, http); | |
fc5d6f7f | 179 | } else if (answer == ACCESS_REQ_PROXY_AUTH) { |
180 | http->al.http.code = HTTP_PROXY_AUTHENTICATION_REQUIRED; | |
181 | http->log_type = LOG_TCP_DENIED; | |
f44af445 | 182 | http->entry = clientCreateStoreEntry(http, http->request->method, 0); |
1bea1d83 | 183 | /* create appropreate response */ |
184 | rep = clientConstructProxyAuthReply(http); | |
185 | httpReplySwapOut(rep, http->entry); | |
186 | /* do not need it anymore */ | |
187 | httpReplyDestroy(rep); | |
f88bb09c | 188 | } else { |
23d92c64 | 189 | debug(33, 5) ("Access Denied: %s\n", http->uri); |
901e234d | 190 | debug(33, 5) ("AclMatchedName = %s\n", |
6f47fbc7 | 191 | AclMatchedName ? AclMatchedName : "<null>"); |
79a15e0a | 192 | http->log_type = LOG_TCP_DENIED; |
f44af445 | 193 | http->entry = clientCreateStoreEntry(http, http->request->method, 0); |
02922e76 | 194 | page_id = aclGetDenyInfoPage(&Config.denyInfoList, AclMatchedName); |
195 | /* NOTE: don't use HTTP_UNAUTHORIZED because then the | |
196 | * stupid browser wants us to authenticate */ | |
197 | err = errorCon(ERR_ACCESS_DENIED, HTTP_FORBIDDEN); | |
198 | err->request = requestLink(http->request); | |
199 | err->src_addr = http->conn->peer.sin_addr; | |
200 | if (page_id > 0) | |
201 | err->page_id = page_id; | |
202 | errorAppendEntry(http->entry, err); | |
f88bb09c | 203 | } |
204 | } | |
205 | ||
b8d8561b | 206 | static void |
207 | clientRedirectDone(void *data, char *result) | |
f88bb09c | 208 | { |
382d851a | 209 | clientHttpRequest *http = data; |
88738790 | 210 | size_t l; |
c0cdaf99 | 211 | request_t *new_request = NULL; |
382d851a | 212 | request_t *old_request = http->request; |
23d92c64 | 213 | debug(33, 5) ("clientRedirectDone: '%s' result=%s\n", http->uri, |
f88bb09c | 214 | result ? result : "NULL"); |
ce66013b | 215 | assert(http->redirect_state == REDIRECT_PENDING); |
382d851a | 216 | http->redirect_state = REDIRECT_DONE; |
77ed547a | 217 | if (result && strcmp(result, http->uri)) |
20cc1450 | 218 | new_request = urlParse(old_request->method, result); |
c0cdaf99 | 219 | if (new_request) { |
23d92c64 | 220 | safe_free(http->uri); |
88738790 | 221 | /* need to malloc because the URL returned by the redirector might |
222 | * not be big enough to append the local domain | |
223 | * -- David Lamkin drl@net-tel.co.uk */ | |
1da5651f | 224 | l = strlen(result) + Config.appendDomainLen + 64; |
23d92c64 | 225 | http->uri = xcalloc(l, 1); |
226 | xstrncpy(http->uri, result, l); | |
20cc1450 | 227 | new_request->http_ver = old_request->http_ver; |
99edd1c3 | 228 | #if OLD_CODE |
16b9d3df | 229 | new_request->headers = xstrdup(old_request->headers); |
2357f74a | 230 | new_request->headers_sz = old_request->headers_sz; |
99edd1c3 | 231 | #else |
232 | new_request->prefix = xstrdup(old_request->prefix); | |
233 | new_request->prefix_sz = old_request->prefix_sz; | |
234 | httpHeaderUpdate(&new_request->header, &old_request->header); | |
235 | #endif | |
77ed547a | 236 | new_request->client_addr = old_request->client_addr; |
237 | EBIT_SET(new_request->flags, REQ_REDIRECTED); | |
6cf028ab | 238 | if (old_request->body) { |
239 | new_request->body = xmalloc(old_request->body_sz); | |
240 | xmemcpy(new_request->body, old_request->body, old_request->body_sz); | |
241 | new_request->body_sz = old_request->body_sz; | |
242 | } | |
20cc1450 | 243 | requestUnlink(old_request); |
382d851a | 244 | http->request = requestLink(new_request); |
23d92c64 | 245 | urlCanonical(http->request, http->uri); |
f88bb09c | 246 | } |
99edd1c3 | 247 | clientInterpretRequestHeaders(http); |
23d92c64 | 248 | fd_note(http->conn->fd, http->uri); |
fb63215a | 249 | clientProcessRequest(http); |
e81957b7 | 250 | } |
251 | ||
fb63215a | 252 | static void |
253 | clientProcessExpired(void *data) | |
620da955 | 254 | { |
382d851a | 255 | clientHttpRequest *http = data; |
23d92c64 | 256 | char *url = http->uri; |
620da955 | 257 | StoreEntry *entry = NULL; |
23d92c64 | 258 | debug(33, 3) ("clientProcessExpired: '%s'\n", http->uri); |
7c1d4010 | 259 | /* |
260 | * check if we are allowed to contact other servers | |
261 | * @?@: Instead of a 504 (Gateway Timeout) reply, we may want to return | |
6106c6fc | 262 | * a stale entry *if* it matches client requirements |
7c1d4010 | 263 | */ |
264 | if (clientOnlyIfCached(http)) { | |
265 | clientProcessOnlyIfCachedMiss(http); | |
266 | return; | |
267 | } | |
79a15e0a | 268 | EBIT_SET(http->request->flags, REQ_REFRESH); |
382d851a | 269 | http->old_entry = http->entry; |
620da955 | 270 | entry = storeCreateEntry(url, |
23d92c64 | 271 | http->log_uri, |
382d851a | 272 | http->request->flags, |
273 | http->request->method); | |
620da955 | 274 | /* NOTE, don't call storeLockObject(), storeCreateEntry() does it */ |
fe96bbe6 | 275 | storeClientListAdd(entry, http); |
276 | storeClientListAdd(http->old_entry, http); | |
382d851a | 277 | entry->lastmod = http->old_entry->lastmod; |
50ddd7a4 | 278 | debug(33, 5) ("clientProcessExpired: setting lmt = %d\n", |
5f6ac48b | 279 | (int) entry->lastmod); |
d1a43e28 | 280 | entry->refcount++; /* EXPIRED CASE */ |
382d851a | 281 | http->entry = entry; |
282 | http->out.offset = 0; | |
fb63215a | 283 | protoDispatch(http->conn->fd, http->entry, http->request); |
f990cccc | 284 | /* Register with storage manager to receive updates when data comes in. */ |
0e473d70 | 285 | if (entry->store_status == STORE_ABORTED) |
6cf028ab | 286 | debug(33, 0) ("clientProcessExpired: entry->swap_status == STORE_ABORTED\n"); |
d89d1fb6 | 287 | storeClientCopy(entry, |
fe96bbe6 | 288 | http->out.offset, |
d89d1fb6 | 289 | http->out.offset, |
290 | 4096, | |
7021844c | 291 | memAllocate(MEM_4K_BUF), |
1b02b5be | 292 | clientHandleIMSReply, |
d89d1fb6 | 293 | http); |
620da955 | 294 | } |
295 | ||
91f4d519 | 296 | static int |
297 | clientGetsOldEntry(StoreEntry * new_entry, StoreEntry * old_entry, request_t * request) | |
298 | { | |
71a8a965 | 299 | const http_status status = new_entry->mem_obj->reply->sline.status; |
300 | if (0 == status) { | |
301 | debug(33, 5) ("clientGetsOldEntry: YES, broken HTTP reply\n"); | |
302 | return 1; | |
303 | } | |
91f4d519 | 304 | /* If the reply is anything but "Not Modified" then |
305 | * we must forward it to the client */ | |
71a8a965 | 306 | if (HTTP_NOT_MODIFIED != status) { |
cb69b4c7 | 307 | debug(33, 5) ("clientGetsOldEntry: NO, reply=%d\n", status); |
91f4d519 | 308 | return 0; |
309 | } | |
310 | /* If the client did not send IMS in the request, then it | |
311 | * must get the old object, not this "Not Modified" reply */ | |
79a15e0a | 312 | if (!EBIT_TEST(request->flags, REQ_IMS)) { |
a3d5953d | 313 | debug(33, 5) ("clientGetsOldEntry: YES, no client IMS\n"); |
91f4d519 | 314 | return 1; |
315 | } | |
316 | /* If the client IMS time is prior to the entry LASTMOD time we | |
317 | * need to send the old object */ | |
318 | if (modifiedSince(old_entry, request)) { | |
5f6ac48b | 319 | debug(33, 5) ("clientGetsOldEntry: YES, modified since %d\n", |
1afe05c5 | 320 | (int) request->ims); |
91f4d519 | 321 | return 1; |
322 | } | |
a3d5953d | 323 | debug(33, 5) ("clientGetsOldEntry: NO, new one is fine\n"); |
91f4d519 | 324 | return 0; |
325 | } | |
326 | ||
327 | ||
52d4522b | 328 | static void |
1b02b5be | 329 | clientHandleIMSReply(void *data, char *buf, ssize_t size) |
620da955 | 330 | { |
382d851a | 331 | clientHttpRequest *http = data; |
382d851a | 332 | StoreEntry *entry = http->entry; |
620da955 | 333 | MemObject *mem = entry->mem_obj; |
9fb13bb6 | 334 | const char *url = storeUrl(entry); |
e92d33a5 | 335 | int unlink_request = 0; |
76cff1d4 | 336 | StoreEntry *oldentry; |
71a8a965 | 337 | const http_status status = mem->reply->sline.status; |
93f9abd0 | 338 | debug(33, 3) ("clientHandleIMSReply: %s, %d bytes\n", url, (int) size); |
3f6c0fb2 | 339 | memFree(MEM_4K_BUF, buf); |
76a5501f | 340 | buf = NULL; |
620da955 | 341 | /* unregister this handler */ |
070d29eb | 342 | if (size < 0 || entry->store_status == STORE_ABORTED) { |
1b02b5be | 343 | debug(33, 3) ("clientHandleIMSReply: ABORTED '%s'\n", url); |
c54e9052 | 344 | /* We have an existing entry, but failed to validate it */ |
accc6d47 | 345 | /* Its okay to send the old one anyway */ |
346 | http->log_type = LOG_TCP_REFRESH_FAIL_HIT; | |
347 | storeUnregister(entry, http); | |
348 | storeUnlockObject(entry); | |
349 | entry = http->entry = http->old_entry; | |
350 | entry->refcount++; | |
71a8a965 | 351 | } else if (STORE_PENDING == entry->store_status && 0 == status) { |
1b02b5be | 352 | debug(33, 3) ("clientHandleIMSReply: Incomplete headers for '%s'\n", url); |
4455552a | 353 | if (size >= 4096) { |
354 | /* will not get any bigger than that */ | |
355 | debug(33, 3) ("clientHandleIMSReply: Reply is too large '%s', using old entry\n", url); | |
878570db | 356 | /* use old entry, this repeats the code abovez */ |
4455552a | 357 | http->log_type = LOG_TCP_REFRESH_FAIL_HIT; |
358 | storeUnregister(entry, http); | |
743eebfa | 359 | storeUnlockObject(entry); |
4455552a | 360 | entry = http->entry = http->old_entry; |
361 | entry->refcount++; | |
878570db | 362 | /* continue */ |
4455552a | 363 | } else { |
4455552a | 364 | storeClientCopy(entry, |
365 | http->out.offset + size, | |
366 | http->out.offset, | |
367 | 4096, | |
368 | memAllocate(MEM_4K_BUF), | |
369 | clientHandleIMSReply, | |
370 | http); | |
878570db | 371 | return; |
4455552a | 372 | } |
382d851a | 373 | } else if (clientGetsOldEntry(entry, http->old_entry, http->request)) { |
620da955 | 374 | /* We initiated the IMS request, the client is not expecting |
76cff1d4 | 375 | * 304, so put the good one back. First, make sure the old entry |
376 | * headers have been loaded from disk. */ | |
382d851a | 377 | oldentry = http->old_entry; |
382d851a | 378 | http->log_type = LOG_TCP_REFRESH_HIT; |
d89d1fb6 | 379 | if (oldentry->mem_obj->request == NULL) { |
380 | oldentry->mem_obj->request = requestLink(mem->request); | |
381 | unlink_request = 1; | |
e92d33a5 | 382 | } |
64763c37 | 383 | /* Don't memcpy() the whole reply structure here. For example, |
384 | * www.thegist.com (Netscape/1.13) returns a content-length for | |
385 | * 304's which seems to be the length of the 304 HEADERS!!! and | |
386 | * not the body they refer to. */ | |
71a8a965 | 387 | httpReplyUpdateOnNotModified(oldentry->mem_obj->reply, mem->reply); |
d89d1fb6 | 388 | storeTimestampsSet(oldentry); |
382d851a | 389 | storeUnregister(entry, http); |
6d54aea8 | 390 | storeUnlockObject(entry); |
382d851a | 391 | entry = http->entry = oldentry; |
41fad779 | 392 | entry->timestamp = squid_curtime; |
657266fe | 393 | if (unlink_request) { |
e92d33a5 | 394 | requestUnlink(entry->mem_obj->request); |
657266fe | 395 | entry->mem_obj->request = NULL; |
396 | } | |
620da955 | 397 | } else { |
398 | /* the client can handle this reply, whatever it is */ | |
382d851a | 399 | http->log_type = LOG_TCP_REFRESH_MISS; |
71a8a965 | 400 | if (HTTP_NOT_MODIFIED == mem->reply->sline.status) { |
382d851a | 401 | http->old_entry->timestamp = squid_curtime; |
402 | http->old_entry->refcount++; | |
403 | http->log_type = LOG_TCP_REFRESH_HIT; | |
d1a43e28 | 404 | } |
382d851a | 405 | storeUnregister(http->old_entry, http); |
406 | storeUnlockObject(http->old_entry); | |
620da955 | 407 | } |
382d851a | 408 | http->old_entry = NULL; /* done with old_entry */ |
0e473d70 | 409 | if (entry->store_status == STORE_ABORTED) { |
6cf028ab | 410 | debug(33, 0) ("clientHandleIMSReply: IMS swapin failed on aborted object\n"); |
411 | http->log_type = LOG_TCP_SWAPFAIL_MISS; | |
412 | clientProcessMiss(http); | |
413 | return; | |
414 | } | |
fdfc0d63 | 415 | /* |
416 | * use clientCacheHit() here as the callback because we might | |
417 | * be swapping in from disk, and the file might not really be | |
418 | * there | |
419 | */ | |
d89d1fb6 | 420 | storeClientCopy(entry, |
fe96bbe6 | 421 | http->out.offset, |
d89d1fb6 | 422 | http->out.offset, |
423 | 4096, | |
7021844c | 424 | memAllocate(MEM_4K_BUF), |
e8479da9 | 425 | clientCacheHit, |
d89d1fb6 | 426 | http); |
620da955 | 427 | } |
91f4d519 | 428 | |
429 | int | |
304d07cb | 430 | modifiedSince(StoreEntry * entry, request_t * request) |
91f4d519 | 431 | { |
432 | int object_length; | |
433 | MemObject *mem = entry->mem_obj; | |
9fb13bb6 | 434 | debug(33, 3) ("modifiedSince: '%s'\n", storeUrl(entry)); |
91f4d519 | 435 | if (entry->lastmod < 0) |
436 | return 1; | |
437 | /* Find size of the object */ | |
038eb4ed | 438 | object_length = mem->reply->content_length; |
cb69b4c7 | 439 | if (object_length < 0) |
07304bf9 | 440 | object_length = contentLen(entry); |
91f4d519 | 441 | if (entry->lastmod > request->ims) { |
a3d5953d | 442 | debug(33, 3) ("--> YES: entry newer than client\n"); |
91f4d519 | 443 | return 1; |
444 | } else if (entry->lastmod < request->ims) { | |
a3d5953d | 445 | debug(33, 3) ("--> NO: entry older than client\n"); |
91f4d519 | 446 | return 0; |
447 | } else if (request->imslen < 0) { | |
a3d5953d | 448 | debug(33, 3) ("--> NO: same LMT, no client length\n"); |
91f4d519 | 449 | return 0; |
450 | } else if (request->imslen == object_length) { | |
a3d5953d | 451 | debug(33, 3) ("--> NO: same LMT, same length\n"); |
91f4d519 | 452 | return 0; |
453 | } else { | |
a3d5953d | 454 | debug(33, 3) ("--> YES: same LMT, different length\n"); |
91f4d519 | 455 | return 1; |
456 | } | |
457 | } | |
b3b64e58 | 458 | |
99edd1c3 | 459 | #if UNUSED_CODE |
b3b64e58 | 460 | char * |
382d851a | 461 | clientConstructTraceEcho(clientHttpRequest * http) |
b3b64e58 | 462 | { |
463 | LOCAL_ARRAY(char, line, 256); | |
464 | LOCAL_ARRAY(char, buf, 8192); | |
465 | size_t len; | |
466 | memset(buf, '\0', 8192); | |
042461c3 | 467 | snprintf(buf, 8192, "HTTP/1.0 200 OK\r\n"); |
56878878 | 468 | snprintf(line, 256, "Date: %s\r\n", mkrfc1123(squid_curtime)); |
b3b64e58 | 469 | strcat(buf, line); |
042461c3 | 470 | snprintf(line, 256, "Server: Squid/%s\r\n", SQUID_VERSION); |
b3b64e58 | 471 | strcat(buf, line); |
042461c3 | 472 | snprintf(line, 256, "Content-Type: message/http\r\n"); |
b3b64e58 | 473 | strcat(buf, line); |
474 | strcat(buf, "\r\n"); | |
475 | len = strlen(buf); | |
382d851a | 476 | httpBuildRequestHeader(http->request, |
477 | http->request, | |
b3b64e58 | 478 | NULL, /* entry */ |
b3b64e58 | 479 | NULL, /* in_len */ |
480 | buf + len, | |
481 | 8192 - len, | |
603a02fd | 482 | http->conn->fd, |
483 | 0); /* flags */ | |
382d851a | 484 | http->log_type = LOG_TCP_MISS; |
4869e8a1 | 485 | http->http_code = HTTP_OK; |
b3b64e58 | 486 | return buf; |
487 | } | |
99edd1c3 | 488 | #endif /* UNUSED_CODE */ |
a90eae18 | 489 | |
490 | void | |
382d851a | 491 | clientPurgeRequest(clientHttpRequest * http) |
a90eae18 | 492 | { |
a90eae18 | 493 | StoreEntry *entry; |
9b312a19 | 494 | ErrorState *err = NULL; |
9fb13bb6 | 495 | const cache_key *k; |
8d6da567 | 496 | HttpReply *r; |
9b312a19 | 497 | debug(33, 3) ("Config.onoff.enable_purge = %d\n", Config.onoff.enable_purge); |
17a0a4ee | 498 | if (!Config.onoff.enable_purge) { |
79a15e0a | 499 | http->log_type = LOG_TCP_DENIED; |
fe40a877 | 500 | err = errorCon(ERR_ACCESS_DENIED, HTTP_FORBIDDEN); |
9b312a19 | 501 | err->request = requestLink(http->request); |
502 | err->src_addr = http->conn->peer.sin_addr; | |
f44af445 | 503 | http->entry = clientCreateStoreEntry(http, http->request->method, 0); |
79e0dc20 | 504 | errorAppendEntry(http->entry, err); |
a90eae18 | 505 | return; |
506 | } | |
382d851a | 507 | http->log_type = LOG_TCP_MISS; |
23d92c64 | 508 | k = storeKeyPublic(http->uri, METHOD_GET); |
9fb13bb6 | 509 | if ((entry = storeGet(k)) == NULL) { |
9b312a19 | 510 | http->http_code = HTTP_NOT_FOUND; |
a90eae18 | 511 | } else { |
512 | storeRelease(entry); | |
9b312a19 | 513 | http->http_code = HTTP_OK; |
a90eae18 | 514 | } |
afa9f1cd | 515 | debug(33, 4) ("clientGetHeadersForIMS: Not modified '%s'\n", |
516 | storeUrl(entry)); | |
517 | /* | |
518 | * Make a new entry to hold the reply to be written | |
519 | * to the client. | |
520 | */ | |
afa9f1cd | 521 | http->entry = clientCreateStoreEntry(http, http->request->method, 0); |
8d6da567 | 522 | httpReplyReset(r = http->entry->mem_obj->reply); |
523 | httpReplySetHeaders(r, 1.0, http->http_code, NULL, NULL, 0, 0, -1); | |
524 | httpReplySwapOut(r, http->entry); | |
afa9f1cd | 525 | storeComplete(http->entry); |
a90eae18 | 526 | } |
e33ba616 | 527 | |
528 | int | |
ea3a2a69 | 529 | checkNegativeHit(StoreEntry * e) |
e33ba616 | 530 | { |
79a15e0a | 531 | if (!EBIT_TEST(e->flag, ENTRY_NEGCACHED)) |
ea3a2a69 | 532 | return 0; |
533 | if (e->expires <= squid_curtime) | |
534 | return 0; | |
535 | if (e->store_status != STORE_OK) | |
536 | return 0; | |
537 | return 1; | |
e33ba616 | 538 | } |
7a2f978b | 539 | |
69c95dd3 | 540 | static void |
541 | updateCDJunkStats() | |
542 | { | |
ea285003 | 543 | /* rewrite */ |
69c95dd3 | 544 | } |
545 | ||
a7c05555 | 546 | void |
0e473d70 | 547 | clientUpdateCounters(clientHttpRequest * http) |
a7c05555 | 548 | { |
ee1679df | 549 | int svc_time = tvSubMsec(http->start, current_time); |
550 | icp_ping_data *i; | |
39edba21 | 551 | HierarchyLogEntry *H; |
0e473d70 | 552 | Counter.client_http.requests++; |
d8b83480 | 553 | if (isTcpHit(http->log_type)) |
0e473d70 | 554 | Counter.client_http.hits++; |
0e473d70 | 555 | if (http->request->err_type != ERR_NONE) |
556 | Counter.client_http.errors++; | |
12cf1be2 | 557 | statHistCount(&Counter.client_http.all_svc_time, svc_time); |
ee1679df | 558 | /* |
559 | * The idea here is not to be complete, but to get service times | |
560 | * for only well-defined types. For example, we don't include | |
561 | * LOG_TCP_REFRESH_FAIL_HIT because its not really a cache hit | |
562 | * (we *tried* to validate it, but failed). | |
563 | */ | |
564 | switch (http->log_type) { | |
565 | case LOG_TCP_IMS_HIT: | |
12cf1be2 | 566 | statHistCount(&Counter.client_http.nm_svc_time, svc_time); |
ee1679df | 567 | break; |
568 | case LOG_TCP_HIT: | |
569 | case LOG_TCP_MEM_HIT: | |
12cf1be2 | 570 | statHistCount(&Counter.client_http.hit_svc_time, svc_time); |
ee1679df | 571 | break; |
572 | case LOG_TCP_MISS: | |
573 | case LOG_TCP_CLIENT_REFRESH_MISS: | |
12cf1be2 | 574 | statHistCount(&Counter.client_http.miss_svc_time, svc_time); |
ee1679df | 575 | break; |
576 | default: | |
577 | /* make compiler warnings go away */ | |
578 | break; | |
579 | } | |
39edba21 | 580 | H = &http->request->hier; |
69c95dd3 | 581 | switch (H->alg) { |
582 | case PEER_SA_DIGEST: | |
17b6e784 | 583 | Counter.cd.times_used++; |
69c95dd3 | 584 | break; |
585 | case PEER_SA_ICP: | |
586 | Counter.icp.times_used++; | |
587 | i = &H->icp; | |
588 | if (0 != i->stop.tv_sec && 0 != i->start.tv_sec) | |
589 | statHistCount(&Counter.icp.query_svc_time, | |
590 | tvSubUsec(i->start, i->stop)); | |
591 | if (i->timeout) | |
592 | Counter.icp.query_timeouts++; | |
593 | break; | |
594 | case PEER_SA_NETDB: | |
595 | Counter.netdb.times_used++; | |
596 | break; | |
597 | default: | |
598 | break; | |
17b6e784 | 599 | } |
a7c05555 | 600 | } |
601 | ||
7a2f978b | 602 | static void |
603 | httpRequestFree(void *data) | |
604 | { | |
605 | clientHttpRequest *http = data; | |
606 | clientHttpRequest **H; | |
607 | ConnStateData *conn = http->conn; | |
608 | StoreEntry *entry = http->entry; | |
609 | request_t *request = http->request; | |
610 | MemObject *mem = NULL; | |
93f9abd0 | 611 | debug(33, 3) ("httpRequestFree: %s\n", storeUrl(entry)); |
1b02b5be | 612 | if (!clientCheckTransferDone(http)) { |
7a2f978b | 613 | if (entry) |
614 | storeUnregister(entry, http); /* unregister BEFORE abort */ | |
615 | CheckQuickAbort(http); | |
616 | entry = http->entry; /* reset, IMS might have changed it */ | |
617 | if (entry && entry->ping_status == PING_WAITING) | |
618 | storeReleaseRequest(entry); | |
79d39a72 | 619 | protoUnregister(entry, request); |
7a2f978b | 620 | } |
621 | assert(http->log_type < LOG_TYPE_MAX); | |
622 | if (entry) | |
623 | mem = entry->mem_obj; | |
624 | if (http->out.size || http->log_type) { | |
625 | http->al.icp.opcode = 0; | |
ef65d6ca | 626 | http->al.url = http->log_uri; |
627 | debug(33, 9) ("httpRequestFree: al.url='%s'\n", http->al.url); | |
7a2f978b | 628 | if (mem) { |
cb69b4c7 | 629 | http->al.http.code = mem->reply->sline.status; |
038eb4ed | 630 | http->al.http.content_type = strBuf(mem->reply->content_type); |
7a2f978b | 631 | } |
632 | http->al.cache.caddr = conn->log_addr; | |
633 | http->al.cache.size = http->out.size; | |
634 | http->al.cache.code = http->log_type; | |
635 | http->al.cache.msec = tvSubMsec(http->start, current_time); | |
636 | http->al.cache.ident = conn->ident.ident; | |
637 | if (request) { | |
638 | http->al.http.method = request->method; | |
99edd1c3 | 639 | http->al.headers.request = request->prefix; |
7a2f978b | 640 | http->al.hier = request->hier; |
641 | } | |
642 | accessLogLog(&http->al); | |
a7c05555 | 643 | clientUpdateCounters(http); |
6f47fbc7 | 644 | clientdbUpdate(conn->peer.sin_addr, http->log_type, PROTO_HTTP, http->out.size); |
7a2f978b | 645 | } |
646 | if (http->redirect_state == REDIRECT_PENDING) | |
23d92c64 | 647 | redirectUnregister(http->uri, http); |
7a2f978b | 648 | if (http->acl_checklist) |
649 | aclChecklistFree(http->acl_checklist); | |
88aad2e5 | 650 | if (request) |
c24fca87 | 651 | checkFailureRatio(request->err_type, http->al.hier.code); |
23d92c64 | 652 | safe_free(http->uri); |
653 | safe_free(http->log_uri); | |
7a2f978b | 654 | safe_free(http->al.headers.reply); |
655 | if (entry) { | |
656 | http->entry = NULL; | |
657 | storeUnregister(entry, http); | |
658 | storeUnlockObject(entry); | |
659 | } | |
660 | /* old_entry might still be set if we didn't yet get the reply | |
1b02b5be | 661 | * code in clientHandleIMSReply() */ |
7a2f978b | 662 | if (http->old_entry) { |
663 | storeUnregister(http->old_entry, http); | |
664 | storeUnlockObject(http->old_entry); | |
665 | http->old_entry = NULL; | |
666 | } | |
667 | requestUnlink(http->request); | |
668 | assert(http != http->next); | |
669 | assert(http->conn->chr != NULL); | |
670 | H = &http->conn->chr; | |
671 | while (*H) { | |
672 | if (*H == http) | |
673 | break; | |
674 | H = &(*H)->next; | |
675 | } | |
676 | assert(*H != NULL); | |
677 | *H = http->next; | |
678 | http->next = NULL; | |
679 | cbdataFree(http); | |
680 | } | |
681 | ||
682 | /* This is a handler normally called by comm_close() */ | |
683 | static void | |
684 | connStateFree(int fd, void *data) | |
685 | { | |
686 | ConnStateData *connState = data; | |
687 | clientHttpRequest *http; | |
93f9abd0 | 688 | debug(33, 3) ("connStateFree: FD %d\n", fd); |
7a2f978b | 689 | assert(connState != NULL); |
79d39a72 | 690 | while ((http = connState->chr) != NULL) { |
7a2f978b | 691 | assert(http->conn == connState); |
692 | assert(connState->chr != connState->chr->next); | |
693 | httpRequestFree(http); | |
694 | } | |
695 | if (connState->ident.fd > -1) | |
696 | comm_close(connState->ident.fd); | |
697 | safe_free(connState->in.buf); | |
59c4d35b | 698 | /* XXX account connState->in.buf */ |
7a2f978b | 699 | pconnHistCount(0, connState->nrequests); |
700 | cbdataFree(connState); | |
701 | } | |
702 | ||
703 | static void | |
99edd1c3 | 704 | clientInterpretRequestHeaders(clientHttpRequest * http) |
7a2f978b | 705 | { |
706 | request_t *request = http->request; | |
99edd1c3 | 707 | #if OLD_CODE |
7a2f978b | 708 | char *request_hdr = request->headers; |
99edd1c3 | 709 | const char *t = NULL; |
710 | #else | |
711 | const HttpHeader *req_hdr = &request->header; | |
712 | #if USE_USERAGENT_LOG | |
713 | const char *str; | |
714 | #endif | |
715 | #endif | |
716 | #if OLD_CODE | |
7a2f978b | 717 | request->ims = -2; |
718 | request->imslen = -1; | |
99edd1c3 | 719 | if ((t = httpHeaderGetStr(req_hdr, HDR_IF_MODIFIED_SINCE))) { |
79a15e0a | 720 | EBIT_SET(request->flags, REQ_IMS); |
7a2f978b | 721 | request->ims = parse_rfc1123(t); |
99edd1c3 | 722 | /* |
723 | * "length=..." is not in the HTTP/1.1 specs. Any real proof that we | |
724 | * should hornor it? Send complains to rousskov@nlanr.net | |
725 | */ | |
7a2f978b | 726 | while ((t = strchr(t, ';'))) { |
727 | for (t++; isspace(*t); t++); | |
728 | if (strncasecmp(t, "length=", 7) == 0) | |
729 | request->imslen = atoi(t + 7); | |
730 | } | |
731 | } | |
99edd1c3 | 732 | #else |
733 | request->imslen = -1; | |
734 | request->ims = httpHeaderGetTime(req_hdr, HDR_IF_MODIFIED_SINCE); | |
735 | if (request->ims > 0) | |
736 | EBIT_SET(request->flags, REQ_IMS); | |
737 | #endif | |
738 | if (httpHeaderHas(req_hdr, HDR_PRAGMA)) { | |
739 | String s = httpHeaderGetList(req_hdr, HDR_PRAGMA); | |
740 | if (strListIsMember(&s, "no-cache", ',')) | |
741 | EBIT_SET(request->flags, REQ_NOCACHE); | |
742 | stringClean(&s); | |
7a2f978b | 743 | } |
99edd1c3 | 744 | if (httpHeaderHas(req_hdr, HDR_RANGE)) { |
79a15e0a | 745 | EBIT_SET(request->flags, REQ_NOCACHE); |
746 | EBIT_SET(request->flags, REQ_RANGE); | |
99edd1c3 | 747 | /* Request-Range: deleted, not in the specs. Does it exist? */ |
7a2f978b | 748 | } |
99edd1c3 | 749 | if (httpHeaderHas(req_hdr, HDR_AUTHORIZATION)) |
79a15e0a | 750 | EBIT_SET(request->flags, REQ_AUTH); |
7a2f978b | 751 | if (request->login[0] != '\0') |
79a15e0a | 752 | EBIT_SET(request->flags, REQ_AUTH); |
99edd1c3 | 753 | #if OLD_CODE |
ea285003 | 754 | if ((t = httpHeaderGetStr(req_hdr, HDR_PROXY_CONNECTION))) { |
7a2f978b | 755 | if (!strcasecmp(t, "Keep-Alive")) |
79a15e0a | 756 | EBIT_SET(request->flags, REQ_PROXY_KEEPALIVE); |
7a2f978b | 757 | } |
99edd1c3 | 758 | #else |
759 | if (httpMsgIsPersistent(request->http_ver, req_hdr)) | |
760 | EBIT_SET(request->flags, REQ_PROXY_KEEPALIVE); | |
761 | #endif | |
762 | if (httpHeaderHas(req_hdr, HDR_VIA)) { | |
763 | String s = httpHeaderGetList(req_hdr, HDR_VIA); | |
edf3ffdc | 764 | /* ThisCache cannot be a member of Via header, "1.0 ThisCache" can */ |
765 | if (strListIsSubstr(&s, ThisCache, ',')) { | |
9330543e | 766 | debug(33, 1) ("WARNING: Forwarding loop detected for '%s'\n", |
767 | http->uri); | |
768 | debug(33, 1) ("--> %s\n", strBuf(s)); | |
79a15e0a | 769 | EBIT_SET(request->flags, REQ_LOOPDETECT); |
7a2f978b | 770 | } |
d21f1c54 | 771 | #if FORW_VIA_DB |
ea285003 | 772 | fvdbCountVia(strBuf(s)); |
d21f1c54 | 773 | #endif |
99edd1c3 | 774 | stringClean(&s); |
d21f1c54 | 775 | } |
7a2f978b | 776 | #if USE_USERAGENT_LOG |
99edd1c3 | 777 | if ((str = httpHeaderGetStr(req_hdr, HDR_USER_AGENT))) |
778 | logUserAgent(fqdnFromAddr(http->conn->peer.sin_addr), str); | |
d21f1c54 | 779 | #endif |
780 | #if FORW_VIA_DB | |
99edd1c3 | 781 | if (httpHeaderHas(req_hdr, HDR_X_FORWARDED_FOR)) { |
782 | String s = httpHeaderGetList(req_hdr, HDR_X_FORWARDED_FOR); | |
783 | fvdbCountForw(strBuf(s)); | |
784 | stringClean(&s); | |
785 | } | |
7a2f978b | 786 | #endif |
99edd1c3 | 787 | #if OLD_CODE |
4e41e277 | 788 | if ((t = mime_get_header_field(request_hdr, "Cache-control", "max-age="))) { |
789 | request->max_age = atoi(t + 8); | |
790 | } else { | |
791 | request->max_age = -1; | |
792 | } | |
793 | if ((t = mime_get_header_field(request_hdr, "Cache-control", "only-if-cached"))) { | |
794 | EBIT_SET(request->flags, REQ_CC_ONLY_IF_CACHED); | |
7a2f978b | 795 | } |
99edd1c3 | 796 | #else |
797 | request->cache_control = httpHeaderGetCc(req_hdr); | |
798 | #endif | |
7a2f978b | 799 | if (request->method == METHOD_TRACE) { |
99edd1c3 | 800 | #if OLD_CODE |
7a2f978b | 801 | if ((t = mime_get_header(request_hdr, "Max-Forwards"))) |
802 | request->max_forwards = atoi(t); | |
99edd1c3 | 803 | #else |
804 | request->max_forwards = httpHeaderGetInt(req_hdr, HDR_MAX_FORWARDS); | |
805 | #endif | |
7a2f978b | 806 | } |
50ddd7a4 | 807 | if (clientCachable(http)) |
808 | EBIT_SET(request->flags, REQ_CACHABLE); | |
809 | if (clientHierarchical(http)) | |
810 | EBIT_SET(request->flags, REQ_HIERARCHICAL); | |
99edd1c3 | 811 | debug(33, 5) ("clientInterpretRequestHeaders: REQ_NOCACHE = %s\n", |
50ddd7a4 | 812 | EBIT_TEST(request->flags, REQ_NOCACHE) ? "SET" : "NOT SET"); |
99edd1c3 | 813 | debug(33, 5) ("clientInterpretRequestHeaders: REQ_CACHABLE = %s\n", |
50ddd7a4 | 814 | EBIT_TEST(request->flags, REQ_CACHABLE) ? "SET" : "NOT SET"); |
99edd1c3 | 815 | debug(33, 5) ("clientInterpretRequestHeaders: REQ_HIERARCHICAL = %s\n", |
50ddd7a4 | 816 | EBIT_TEST(request->flags, REQ_HIERARCHICAL) ? "SET" : "NOT SET"); |
7a2f978b | 817 | } |
818 | ||
31be8b80 | 819 | static int |
efb9218c | 820 | clientCheckContentLength(request_t * r) |
31be8b80 | 821 | { |
99edd1c3 | 822 | #if OLD_CODE |
31be8b80 | 823 | char *t; |
824 | int len; | |
825 | /* | |
efb9218c | 826 | * We only require a content-length for "upload" methods |
31be8b80 | 827 | */ |
efb9218c | 828 | if (0 == pumpMethod(r->method)) |
31be8b80 | 829 | return 1; |
31be8b80 | 830 | t = mime_get_header(r->headers, "Content-Length"); |
efb9218c | 831 | if (NULL == t) |
31be8b80 | 832 | return 0; |
833 | len = atoi(t); | |
834 | if (len < 0) | |
835 | return 0; | |
836 | return 1; | |
99edd1c3 | 837 | #else |
838 | /* We only require a content-length for "upload" methods */ | |
ea285003 | 839 | return !pumpMethod(r->method) || |
99edd1c3 | 840 | httpHeaderGetInt(&r->header, HDR_CONTENT_LENGTH) >= 0; |
841 | #endif | |
31be8b80 | 842 | } |
843 | ||
7a2f978b | 844 | static int |
50ddd7a4 | 845 | clientCachable(clientHttpRequest * http) |
7a2f978b | 846 | { |
23d92c64 | 847 | const char *url = http->uri; |
7a2f978b | 848 | request_t *req = http->request; |
849 | method_t method = req->method; | |
bd05e3e3 | 850 | aclCheck_t ch; |
851 | memset(&ch, '\0', sizeof(ch)); | |
852 | /* | |
853 | * Hopefully, nobody really wants 'no_cache' by client's IP | |
854 | * address, but if they do, this should work if they use IP | |
855 | * addresses in their ACLs, or if the client's address is in | |
856 | * the FQDN cache. | |
857 | * | |
858 | * This may not work yet for 'dst' and 'dst_domain' ACLs. | |
859 | */ | |
860 | ch.src_addr = http->conn->peer.sin_addr; | |
861 | ch.request = http->request; | |
79a51871 | 862 | /* |
863 | * aclCheckFast returns 1 for ALLOW and 0 for DENY. The default | |
864 | * is ALLOW, so we require 'no_cache DENY foo' in squid.conf | |
865 | * to indicate uncachable objects. | |
866 | */ | |
95291419 | 867 | if (!aclCheckFast(Config.accessList.noCache, &ch)) |
4b4cd312 | 868 | return 0; |
7a2f978b | 869 | if (req->protocol == PROTO_HTTP) |
870 | return httpCachable(method); | |
871 | /* FTP is always cachable */ | |
872 | if (req->protocol == PROTO_GOPHER) | |
873 | return gopherCachable(url); | |
874 | if (req->protocol == PROTO_WAIS) | |
875 | return 0; | |
876 | if (method == METHOD_CONNECT) | |
877 | return 0; | |
878 | if (method == METHOD_TRACE) | |
879 | return 0; | |
880 | if (req->protocol == PROTO_CACHEOBJ) | |
881 | return 0; | |
882 | return 1; | |
883 | } | |
884 | ||
885 | /* Return true if we can query our neighbors for this object */ | |
886 | static int | |
50ddd7a4 | 887 | clientHierarchical(clientHttpRequest * http) |
7a2f978b | 888 | { |
23d92c64 | 889 | const char *url = http->uri; |
7a2f978b | 890 | request_t *request = http->request; |
891 | method_t method = request->method; | |
892 | const wordlist *p = NULL; | |
893 | ||
894 | /* IMS needs a private key, so we can use the hierarchy for IMS only | |
895 | * if our neighbors support private keys */ | |
79a15e0a | 896 | if (EBIT_TEST(request->flags, REQ_IMS) && !neighbors_do_private_keys) |
7a2f978b | 897 | return 0; |
79a15e0a | 898 | if (EBIT_TEST(request->flags, REQ_AUTH)) |
7a2f978b | 899 | return 0; |
900 | if (method == METHOD_TRACE) | |
901 | return 1; | |
902 | if (method != METHOD_GET) | |
903 | return 0; | |
904 | /* scan hierarchy_stoplist */ | |
905 | for (p = Config.hierarchy_stoplist; p; p = p->next) | |
906 | if (strstr(url, p->key)) | |
907 | return 0; | |
79a15e0a | 908 | if (EBIT_TEST(request->flags, REQ_LOOPDETECT)) |
7a2f978b | 909 | return 0; |
910 | if (request->protocol == PROTO_HTTP) | |
911 | return httpCachable(method); | |
912 | if (request->protocol == PROTO_GOPHER) | |
913 | return gopherCachable(url); | |
914 | if (request->protocol == PROTO_WAIS) | |
915 | return 0; | |
916 | if (request->protocol == PROTO_CACHEOBJ) | |
917 | return 0; | |
918 | return 1; | |
919 | } | |
920 | ||
cf50a0af | 921 | int |
7a2f978b | 922 | isTcpHit(log_type code) |
923 | { | |
924 | /* this should be a bitmap for better optimization */ | |
925 | if (code == LOG_TCP_HIT) | |
926 | return 1; | |
927 | if (code == LOG_TCP_IMS_HIT) | |
928 | return 1; | |
929 | if (code == LOG_TCP_REFRESH_FAIL_HIT) | |
930 | return 1; | |
931 | if (code == LOG_TCP_REFRESH_HIT) | |
932 | return 1; | |
933 | if (code == LOG_TCP_NEGATIVE_HIT) | |
934 | return 1; | |
935 | if (code == LOG_TCP_MEM_HIT) | |
936 | return 1; | |
937 | return 0; | |
938 | } | |
939 | ||
940 | static void | |
941 | clientAppendReplyHeader(char *hdr, const char *line, size_t * sz, size_t max) | |
942 | { | |
943 | size_t n = *sz + strlen(line) + 2; | |
944 | if (n >= max) | |
945 | return; | |
946 | strcpy(hdr + (*sz), line); | |
947 | strcat(hdr + (*sz), crlf); | |
948 | *sz = n; | |
949 | } | |
950 | ||
adba4a64 | 951 | /* this entire function has to be rewriten using new interfaces @?@ @?@ */ |
7a2f978b | 952 | size_t |
953 | clientBuildReplyHeader(clientHttpRequest * http, | |
954 | char *hdr_in, | |
2334c194 | 955 | size_t hdr_in_sz, |
7a2f978b | 956 | size_t * in_len, |
957 | char *hdr_out, | |
958 | size_t out_sz) | |
959 | { | |
ab013258 | 960 | LOCAL_ARRAY(char, no_forward, 1024); |
7a2f978b | 961 | char *xbuf; |
962 | char *ybuf; | |
963 | char *t = NULL; | |
2334c194 | 964 | char *end; |
7a2f978b | 965 | size_t len = 0; |
966 | size_t hdr_len = 0; | |
967 | size_t l; | |
efb9218c | 968 | if (0 != strncmp(hdr_in, "HTTP/", 5)) |
969 | return 0; | |
2334c194 | 970 | hdr_len = headersEnd(hdr_in, hdr_in_sz); |
8e8731ad | 971 | if (0 == hdr_len) { |
93f9abd0 | 972 | debug(33, 3) ("clientBuildReplyHeader: DIDN'T FIND END-OF-HEADERS\n"); |
7a2f978b | 973 | return 0; |
974 | } | |
7021844c | 975 | xbuf = memAllocate(MEM_4K_BUF); |
976 | ybuf = memAllocate(MEM_4K_BUF); | |
2334c194 | 977 | end = hdr_in + hdr_len; |
7a2f978b | 978 | for (t = hdr_in; t < end; t += strcspn(t, crlf), t += strspn(t, crlf)) { |
7a2f978b | 979 | l = strcspn(t, crlf) + 1; |
8febe7df | 980 | /* Wow, we might find a NULL before 'end' */ |
981 | if (1 == l) | |
982 | break; | |
7a2f978b | 983 | xstrncpy(xbuf, t, l > 4096 ? 4096 : l); |
ae1acd0b | 984 | /* enforce 1.0 reply version, this hack will be rewritten */ |
2334c194 | 985 | if (t == hdr_in && !strncasecmp(xbuf, "HTTP/", 5) && l > 8 && |
2ac76861 | 986 | (isspace(xbuf[8]) || isspace(xbuf[9]))) |
987 | xmemmove(xbuf + 5, "1.0 ", 4); | |
901e234d | 988 | #if DONT_FILTER_THESE |
989 | /* | |
99edd1c3 | 990 | * but you might want to if you run Squid as an HTTP accelerator |
901e234d | 991 | */ |
7a2f978b | 992 | if (strncasecmp(xbuf, "Accept-Ranges:", 14) == 0) |
993 | continue; | |
994 | if (strncasecmp(xbuf, "Etag:", 5) == 0) | |
995 | continue; | |
996 | #endif | |
997 | if (strncasecmp(xbuf, "Proxy-Connection:", 17) == 0) | |
998 | continue; | |
ab013258 | 999 | if (strncasecmp(xbuf, "Connection:", 11) == 0) { |
1000 | handleConnectionHeader(0, no_forward, &xbuf[11]); | |
7a2f978b | 1001 | continue; |
ab013258 | 1002 | } |
99edd1c3 | 1003 | if (strncasecmp(xbuf, "keep-alive:", 11) == 0) |
7a2f978b | 1004 | continue; |
1005 | if (strncasecmp(xbuf, "Set-Cookie:", 11) == 0) | |
1006 | if (isTcpHit(http->log_type)) | |
1007 | continue; | |
ab013258 | 1008 | if (!handleConnectionHeader(1, no_forward, xbuf)) |
1009 | clientAppendReplyHeader(hdr_out, xbuf, &len, out_sz - 512); | |
7a2f978b | 1010 | } |
7a2f978b | 1011 | /* Append X-Cache: */ |
02941a5d | 1012 | snprintf(ybuf, 4096, "X-Cache: %s from %s", |
1013 | isTcpHit(http->log_type) ? "HIT" : "MISS", | |
1014 | getMyHostname()); | |
7a2f978b | 1015 | clientAppendReplyHeader(hdr_out, ybuf, &len, out_sz); |
6cfa8966 | 1016 | #if USE_CACHE_DIGESTS |
57b1ff70 | 1017 | /* Append X-Cache-Lookup: -- temporary hack, to be removed @?@ @?@ */ |
1018 | snprintf(ybuf, 4096, "X-Cache-Lookup: %s from %s:%d", | |
1019 | http->lookup_type ? http->lookup_type : "NONE", | |
1020 | getMyHostname(), Config.Port.http->i); | |
1021 | clientAppendReplyHeader(hdr_out, ybuf, &len, out_sz); | |
1022 | #endif | |
7a2f978b | 1023 | /* Append Proxy-Connection: */ |
79a15e0a | 1024 | if (EBIT_TEST(http->request->flags, REQ_PROXY_KEEPALIVE)) { |
99edd1c3 | 1025 | snprintf(ybuf, 4096, "Proxy-Connection: keep-alive"); |
7a2f978b | 1026 | clientAppendReplyHeader(hdr_out, ybuf, &len, out_sz); |
1027 | } | |
1028 | clientAppendReplyHeader(hdr_out, null_string, &len, out_sz); | |
1029 | if (in_len) | |
1030 | *in_len = hdr_len; | |
1031 | if ((l = strlen(hdr_out)) != len) { | |
1032 | debug_trap("clientBuildReplyHeader: size mismatch"); | |
1033 | len = l; | |
1034 | } | |
93f9abd0 | 1035 | debug(33, 3) ("clientBuildReplyHeader: OUTPUT:\n%s\n", hdr_out); |
3f6c0fb2 | 1036 | memFree(MEM_4K_BUF, xbuf); |
1037 | memFree(MEM_4K_BUF, ybuf); | |
7a2f978b | 1038 | return len; |
1039 | } | |
1040 | ||
4c323c5f | 1041 | static void |
7a2f978b | 1042 | clientCacheHit(void *data, char *buf, ssize_t size) |
1043 | { | |
1044 | clientHttpRequest *http = data; | |
fdfc0d63 | 1045 | StoreEntry *e; |
93f9abd0 | 1046 | debug(33, 3) ("clientCacheHit: %s, %d bytes\n", http->uri, (int) size); |
7a2f978b | 1047 | if (size >= 0) { |
1048 | clientSendMoreData(data, buf, size); | |
1049 | } else if (http->entry == NULL) { | |
93f9abd0 | 1050 | debug(33, 3) ("clientCacheHit: request aborted\n"); |
7a2f978b | 1051 | } else { |
1052 | /* swap in failure */ | |
93f9abd0 | 1053 | debug(33, 3) ("clientCacheHit: swapin failure for %s\n", http->uri); |
7a2f978b | 1054 | http->log_type = LOG_TCP_SWAPFAIL_MISS; |
fdfc0d63 | 1055 | if ((e = http->entry)) { |
1056 | http->entry = NULL; | |
1057 | storeUnregister(e, http); | |
fdfc0d63 | 1058 | storeUnlockObject(e); |
1059 | } | |
fb63215a | 1060 | clientProcessMiss(http); |
7a2f978b | 1061 | } |
1062 | } | |
1063 | ||
4c323c5f | 1064 | static void |
7a2f978b | 1065 | clientSendMoreData(void *data, char *buf, ssize_t size) |
1066 | { | |
1067 | clientHttpRequest *http = data; | |
1068 | StoreEntry *entry = http->entry; | |
1069 | ConnStateData *conn = http->conn; | |
1070 | int fd = conn->fd; | |
7a2f978b | 1071 | size_t hdrlen; |
1072 | size_t l = 0; | |
1073 | size_t writelen; | |
1074 | char *newbuf; | |
3f6c0fb2 | 1075 | FREE *freefunc = memFree4K; |
93f9abd0 | 1076 | debug(33, 5) ("clientSendMoreData: %s, %d bytes\n", http->uri, (int) size); |
7a2f978b | 1077 | assert(size <= SM_PAGE_SIZE); |
40defb17 | 1078 | assert(http->request != NULL); |
93f9abd0 | 1079 | debug(33, 5) ("clientSendMoreData: FD %d '%s', out.offset=%d \n", |
5f6ac48b | 1080 | fd, storeUrl(entry), (int) http->out.offset); |
7a2f978b | 1081 | if (conn->chr != http) { |
1082 | /* there is another object in progress, defer this one */ | |
a43b3862 | 1083 | debug(0, 0) ("clientSendMoreData: Deferring %s\n", storeUrl(entry)); |
7a2f978b | 1084 | freefunc(buf); |
1085 | return; | |
fdfc0d63 | 1086 | } else if (entry && entry->store_status == STORE_ABORTED) { |
d6e928c9 | 1087 | /* call clientWriteComplete so the client socket gets closed */ |
1088 | clientWriteComplete(fd, NULL, 0, COMM_OK, http); | |
7a2f978b | 1089 | freefunc(buf); |
1090 | return; | |
1091 | } else if (size < 0) { | |
d6e928c9 | 1092 | /* call clientWriteComplete so the client socket gets closed */ |
1093 | clientWriteComplete(fd, NULL, 0, COMM_OK, http); | |
7a2f978b | 1094 | freefunc(buf); |
1095 | return; | |
1096 | } else if (size == 0) { | |
d6e928c9 | 1097 | /* call clientWriteComplete so the client socket gets closed */ |
1098 | clientWriteComplete(fd, NULL, 0, COMM_OK, http); | |
7a2f978b | 1099 | freefunc(buf); |
1100 | return; | |
1101 | } | |
1102 | writelen = size; | |
40defb17 | 1103 | if (http->out.offset == 0) { |
7a2f978b | 1104 | if (Config.onoff.log_mime_hdrs) { |
2334c194 | 1105 | size_t k; |
1106 | if ((k = headersEnd(buf, size))) { | |
7a2f978b | 1107 | safe_free(http->al.headers.reply); |
1afe05c5 | 1108 | http->al.headers.reply = xcalloc(k + 1, 1); |
2334c194 | 1109 | xstrncpy(http->al.headers.reply, buf, k); |
7a2f978b | 1110 | } |
1111 | } | |
7021844c | 1112 | newbuf = memAllocate(MEM_8K_BUF); |
7a2f978b | 1113 | hdrlen = 0; |
2334c194 | 1114 | l = clientBuildReplyHeader(http, buf, size, &hdrlen, newbuf, 8192); |
7a2f978b | 1115 | if (l != 0) { |
1116 | writelen = l + size - hdrlen; | |
1117 | assert(writelen <= 8192); | |
1118 | /* | |
1119 | * l is the length of the new headers in newbuf | |
1120 | * hdrlen is the length of the old headers in buf | |
1121 | * size - hdrlen is the amount of body in buf | |
1122 | */ | |
93f9abd0 | 1123 | debug(33, 3) ("clientSendMoreData: Appending %d bytes after headers\n", |
7a2f978b | 1124 | (int) (size - hdrlen)); |
6cf028ab | 1125 | if (((size - hdrlen) + l) > 8192) { |
0e473d70 | 1126 | debug(0, 0) ("Size, hdrlen, l %d, %d, %d\n", size, hdrlen, l); |
6cf028ab | 1127 | return; |
1128 | } | |
7a2f978b | 1129 | xmemcpy(newbuf + l, buf + hdrlen, size - hdrlen); |
1130 | /* replace buf with newbuf */ | |
1131 | freefunc(buf); | |
1132 | buf = newbuf; | |
3f6c0fb2 | 1133 | freefunc = memFree8K; |
7a2f978b | 1134 | newbuf = NULL; |
1135 | } else { | |
3f6c0fb2 | 1136 | memFree(MEM_8K_BUF, newbuf); |
7a2f978b | 1137 | newbuf = NULL; |
1138 | if (size < SM_PAGE_SIZE && entry->store_status == STORE_PENDING) { | |
1139 | /* wait for more to arrive */ | |
1140 | storeClientCopy(entry, | |
1141 | http->out.offset + size, | |
1142 | http->out.offset, | |
1143 | SM_PAGE_SIZE, | |
1144 | buf, | |
1145 | clientSendMoreData, | |
1146 | http); | |
1147 | return; | |
1148 | } | |
1149 | } | |
1150 | } | |
1151 | http->out.offset += size; | |
40defb17 | 1152 | /* |
1153 | * ick, this is gross | |
1154 | */ | |
7a2f978b | 1155 | if (http->request->method == METHOD_HEAD) { |
2334c194 | 1156 | size_t k; |
1157 | if ((k = headersEnd(buf, size))) { | |
1158 | writelen = k; | |
7a2f978b | 1159 | /* force end */ |
f68b5d81 | 1160 | if (entry->store_status == STORE_PENDING) |
c24fca87 | 1161 | http->out.offset = entry->mem_obj->inmem_hi; |
f68b5d81 | 1162 | else |
07304bf9 | 1163 | http->out.offset = objectLen(entry); |
7a2f978b | 1164 | } |
1165 | } | |
1166 | comm_write(fd, buf, writelen, clientWriteComplete, http, freefunc); | |
1167 | } | |
1168 | ||
1a92a1e2 | 1169 | static |
1170 | void | |
1171 | clientKeepaliveNextRequest(clientHttpRequest * http) | |
1172 | { | |
1173 | ConnStateData *conn = http->conn; | |
1174 | StoreEntry *entry; | |
1175 | conn->defer.until = 0; /* Kick it to read a new request */ | |
1176 | httpRequestFree(http); | |
1177 | if ((http = conn->chr) != NULL) { | |
1178 | debug(33, 1) ("clientKeepaliveNextRequest: FD %d Sending next\n", | |
1179 | conn->fd); | |
1180 | entry = http->entry; | |
1181 | if (0 == storeClientCopyPending(entry, http)) { | |
1182 | if (entry->store_status == STORE_ABORTED) | |
1183 | debug(33, 0) ("clientWriteComplete: entry->swap_status == STORE_ABORTED\n"); | |
1184 | storeClientCopy(entry, | |
1185 | http->out.offset, | |
1186 | http->out.offset, | |
1187 | SM_PAGE_SIZE, | |
1188 | memAllocate(MEM_4K_BUF), | |
1189 | clientSendMoreData, | |
1190 | http); | |
1191 | } | |
1192 | } else { | |
1193 | debug(33, 5) ("clientWriteComplete: FD %d reading next request\n", | |
1194 | conn->fd); | |
1195 | fd_note(conn->fd, "Reading next request"); | |
1196 | /* | |
1197 | * Set the timeout BEFORE calling clientReadRequest(). | |
1198 | */ | |
1199 | commSetTimeout(conn->fd, 15, requestTimeout, conn); | |
1200 | clientReadRequest(conn->fd, conn); /* Read next request */ | |
1201 | /* | |
1202 | * Note, the FD may be closed at this point. | |
1203 | */ | |
1204 | } | |
1205 | } | |
1206 | ||
fc5d6f7f | 1207 | static void |
79a15e0a | 1208 | clientWriteComplete(int fd, char *bufnotused, size_t size, int errflag, void *data) |
7a2f978b | 1209 | { |
1210 | clientHttpRequest *http = data; | |
7a2f978b | 1211 | StoreEntry *entry = http->entry; |
b34ed725 | 1212 | int done; |
7a2f978b | 1213 | http->out.size += size; |
93f9abd0 | 1214 | debug(33, 5) ("clientWriteComplete: FD %d, sz %d, err %d, off %d, len %d\n", |
5f6ac48b | 1215 | fd, size, errflag, (int) http->out.offset, objectLen(entry)); |
d8b83480 | 1216 | if (size > 0) { |
ea285003 | 1217 | kb_incr(&Counter.client_http.kbytes_out, size); |
1218 | if (isTcpHit(http->log_type)) | |
d8b83480 | 1219 | kb_incr(&Counter.client_http.hit_kbytes_out, size); |
1220 | } | |
7a2f978b | 1221 | if (errflag) { |
36547bcf | 1222 | #if DONT_DO_THIS |
1223 | /* | |
1224 | * Not sure why this CheckQuickAbort() would be needed here. | |
1225 | * We also call CheckQuickAbort() in httpRequestFree(), which | |
1226 | * gets called as a comm_close handler. We need to be careful | |
1227 | * that CheckQuickAbort() gets called only ONCE, and AFTER | |
1228 | * storeUnregister() has been called. [DW/1.2.beta18] | |
1229 | */ | |
7a2f978b | 1230 | CheckQuickAbort(http); |
36547bcf | 1231 | #endif |
7a2f978b | 1232 | comm_close(fd); |
fdfc0d63 | 1233 | } else if (NULL == entry) { |
1234 | comm_close(fd); /* yuk */ | |
7a2f978b | 1235 | } else if (entry->store_status == STORE_ABORTED) { |
7a2f978b | 1236 | comm_close(fd); |
a200bbd2 | 1237 | } else if ((done = clientCheckTransferDone(http)) != 0 || size == 0) { |
93f9abd0 | 1238 | debug(33, 5) ("clientWriteComplete: FD %d transfer is DONE\n", fd); |
7a2f978b | 1239 | /* We're finished case */ |
038eb4ed | 1240 | if (http->entry->mem_obj->reply->content_length < 0 || !done || |
b34ed725 | 1241 | EBIT_TEST(entry->flag, ENTRY_BAD_LENGTH)) { |
1242 | /* | |
1243 | * Client connection closed due to unknown or invalid | |
1244 | * content length. Persistent connection is not possible. | |
1245 | * This catches most cases, but probably not all. | |
1246 | */ | |
7a2f978b | 1247 | comm_close(fd); |
79a15e0a | 1248 | } else if (EBIT_TEST(http->request->flags, REQ_PROXY_KEEPALIVE)) { |
93f9abd0 | 1249 | debug(33, 5) ("clientWriteComplete: FD %d Keeping Alive\n", fd); |
1a92a1e2 | 1250 | clientKeepaliveNextRequest(http); |
7a2f978b | 1251 | } else { |
1252 | comm_close(fd); | |
1253 | } | |
1254 | } else { | |
1255 | /* More data will be coming from primary server; register with | |
1256 | * storage manager. */ | |
0e473d70 | 1257 | if (entry->store_status == STORE_ABORTED) |
6cf028ab | 1258 | debug(33, 0) ("clientWriteComplete 2: entry->swap_status == STORE_ABORTED\n"); |
7a2f978b | 1259 | storeClientCopy(entry, |
1260 | http->out.offset, | |
1261 | http->out.offset, | |
1262 | SM_PAGE_SIZE, | |
7021844c | 1263 | memAllocate(MEM_4K_BUF), |
7a2f978b | 1264 | clientSendMoreData, |
1265 | http); | |
1266 | } | |
1267 | } | |
1268 | ||
2920225f | 1269 | /* called when clientGetHeadersFor*IMS completes */ |
1270 | static void | |
ea285003 | 1271 | clientFinishIMS(clientHttpRequest * http) |
2920225f | 1272 | { |
1273 | StoreEntry *entry = http->entry; | |
1274 | MemBuf mb; | |
1275 | ||
1276 | http->log_type = LOG_TCP_IMS_HIT; | |
1277 | entry->refcount++; | |
1278 | /* All headers are available, double check if object is modified or not */ | |
1279 | if (modifiedSince(entry, http->request)) { | |
1280 | debug(33, 4) ("clientFinishIMS: Modified '%s'\n", | |
1281 | storeUrl(entry)); | |
1282 | if (entry->store_status == STORE_ABORTED) | |
1283 | debug(33, 0) ("clientFinishIMS: entry->swap_status == STORE_ABORTED\n"); | |
1284 | storeClientCopy(entry, | |
1285 | http->out.offset, | |
1286 | http->out.offset, | |
1287 | SM_PAGE_SIZE, | |
1288 | memAllocate(MEM_4K_BUF), | |
1289 | clientSendMoreData, | |
1290 | http); | |
1291 | return; | |
1292 | } | |
1293 | debug(33, 4) ("clientFinishIMS: Not modified '%s'\n", | |
1294 | storeUrl(entry)); | |
1295 | /* | |
1296 | * Create the Not-Modified reply from the existing entry, | |
1297 | * Then make a new entry to hold the reply to be written | |
1298 | * to the client. | |
1299 | */ | |
1300 | mb = httpPacked304Reply(entry->mem_obj->reply); | |
1301 | storeUnregister(entry, http); | |
1302 | storeUnlockObject(entry); | |
1303 | http->entry = clientCreateStoreEntry(http, http->request->method, 0); | |
1304 | httpReplyParse(http->entry->mem_obj->reply, mb.buf); | |
1305 | storeAppend(http->entry, mb.buf, mb.size); | |
1306 | memBufClean(&mb); | |
1307 | storeComplete(http->entry); | |
1308 | } | |
1309 | ||
7a2f978b | 1310 | static void |
1b02b5be | 1311 | clientGetHeadersForIMS(void *data, char *buf, ssize_t size) |
7a2f978b | 1312 | { |
1313 | clientHttpRequest *http = data; | |
7a2f978b | 1314 | StoreEntry *entry = http->entry; |
dd83ba69 | 1315 | MemObject *mem; |
93f9abd0 | 1316 | debug(33, 3) ("clientGetHeadersForIMS: %s, %d bytes\n", |
1317 | http->uri, (int) size); | |
7a2f978b | 1318 | assert(size <= SM_PAGE_SIZE); |
3f6c0fb2 | 1319 | memFree(MEM_4K_BUF, buf); |
1b02b5be | 1320 | buf = NULL; |
6cf028ab | 1321 | if (size < 0 || entry->store_status == STORE_ABORTED) { |
8d4f9bc8 | 1322 | /* |
1323 | * There are different reasons why we might have size < 0. One | |
1324 | * being that we failed to open a swapfile. Another being that | |
1325 | * the request was cancelled from the client-side. If the client | |
1326 | * cancelled the request, then http->entry will be NULL. | |
1327 | */ | |
1328 | if (entry != NULL) { | |
1329 | debug(33, 1) ("clientGetHeadersForIMS: storeClientCopy failed for '%s'\n", | |
1330 | storeKeyText(entry->key)); | |
1331 | clientProcessMiss(http); | |
1332 | } | |
7a2f978b | 1333 | return; |
1334 | } | |
dd83ba69 | 1335 | mem = entry->mem_obj; |
cb69b4c7 | 1336 | if (mem->reply->sline.status == 0) { |
7a2f978b | 1337 | if (entry->mem_status == IN_MEMORY) { |
fb63215a | 1338 | clientProcessMiss(http); |
7a2f978b | 1339 | return; |
1340 | } | |
93f9abd0 | 1341 | if (size == SM_PAGE_SIZE && http->out.offset == 0) { |
1342 | /* | |
1343 | * We can't get any more headers than this, so bail | |
1344 | */ | |
1345 | debug(33, 1) ("clientGetHeadersForIMS: failed, forcing cache miss\n"); | |
1346 | clientProcessMiss(http); | |
1347 | return; | |
1348 | } | |
1349 | debug(33, 3) ("clientGetHeadersForIMS: waiting for HTTP reply headers\n"); | |
7a2f978b | 1350 | /* All headers are not yet available, wait for more data */ |
0e473d70 | 1351 | if (entry->store_status == STORE_ABORTED) |
6cf028ab | 1352 | debug(33, 0) ("clientGetHeadersForIMS: entry->swap_status == STORE_ABORTED\n"); |
7a2f978b | 1353 | storeClientCopy(entry, |
1354 | http->out.offset + size, | |
1355 | http->out.offset, | |
1356 | SM_PAGE_SIZE, | |
7021844c | 1357 | memAllocate(MEM_4K_BUF), |
1b02b5be | 1358 | clientGetHeadersForIMS, |
7a2f978b | 1359 | http); |
1360 | return; | |
1361 | } | |
1362 | /* All headers are available, check if object is modified or not */ | |
1363 | /* --------------------------------------------------------------- | |
cb69b4c7 | 1364 | * Removed check for reply->sline.status != 200 because of a potential |
7a2f978b | 1365 | * problem with ICP. We will return a HIT for any public, cached |
1366 | * object. This includes other responses like 301, 410, as coded in | |
1367 | * http.c. It is Bad(tm) to return UDP_HIT and then, if the reply | |
50ddd7a4 | 1368 | * code is not 200, hand off to clientProcessMiss(), which may disallow |
7a2f978b | 1369 | * the request based on 'miss_access' rules. Alternatively, we might |
1370 | * consider requiring returning UDP_HIT only for 200's. This | |
1371 | * problably means an entry->flag bit, which would be lost during | |
1372 | * restart because the flags aren't preserved across restarts. | |
1373 | * --DW 3/11/96. | |
1374 | * ---------------------------------------------------------------- */ | |
1375 | #ifdef CHECK_REPLY_CODE_NOTEQUAL_200 | |
1376 | /* Only objects with statuscode==200 can be "Not modified" */ | |
cb69b4c7 | 1377 | if (mem->reply->sline.status != 200) { |
93f9abd0 | 1378 | debug(33, 4) ("clientGetHeadersForIMS: Reply code %d!=200\n", |
cb69b4c7 | 1379 | mem->reply->sline.status); |
fb63215a | 1380 | clientProcessMiss(http); |
7a2f978b | 1381 | return; |
1382 | } | |
7a2f978b | 1383 | #endif |
2920225f | 1384 | clientFinishIMS(http); |
1385 | } | |
1386 | ||
1387 | /* | |
99edd1c3 | 1388 | * client sent an IMS request for ENTRY_SPECIAL; |
1389 | * mimic clientGetHeadersForIMS(), but call clientCacheHit() | |
1390 | * if something goes wrong; | |
1391 | * note: clientGetHeadersForIMS frees "buf" earlier than we do | |
2920225f | 1392 | */ |
1393 | static void | |
1394 | clientGetHeadersForSpecialIMS(void *data, char *buf, ssize_t size) | |
1395 | { | |
1396 | clientHttpRequest *http = data; | |
1397 | StoreEntry *entry = http->entry; | |
1398 | debug(33, 3) ("clientGetHeadersForSpecialIMS: %s, %d bytes\n", | |
1399 | http->uri, (int) size); | |
1400 | assert(size <= SM_PAGE_SIZE); | |
1401 | if (size < 0 || entry->store_status == STORE_ABORTED) { | |
1402 | clientCacheHit(data, buf, size); | |
1403 | return; | |
1404 | } | |
1405 | if (entry->mem_obj->reply->sline.status == 0) { | |
1406 | if (entry->mem_status == IN_MEMORY) { | |
1407 | clientCacheHit(data, buf, size); | |
1408 | return; | |
1409 | } | |
1410 | if (size == SM_PAGE_SIZE && http->out.offset == 0) { | |
1411 | clientCacheHit(data, buf, size); | |
1412 | return; | |
1413 | } | |
1414 | debug(33, 3) ("clientGetHeadersForSpecialIMS: waiting for HTTP reply headers\n"); | |
1415 | /* All headers are not yet available, wait for more data */ | |
0e473d70 | 1416 | if (entry->store_status == STORE_ABORTED) |
2920225f | 1417 | debug(33, 0) ("clientGetHeadersForSpecialIMS: entry->swap_status == STORE_ABORTED\n"); |
7a2f978b | 1418 | storeClientCopy(entry, |
2920225f | 1419 | http->out.offset + size, |
7a2f978b | 1420 | http->out.offset, |
1421 | SM_PAGE_SIZE, | |
2920225f | 1422 | buf, |
1423 | clientGetHeadersForSpecialIMS, | |
7a2f978b | 1424 | http); |
1425 | return; | |
1426 | } | |
2920225f | 1427 | memFree(MEM_4K_BUF, buf); |
1428 | clientFinishIMS(http); | |
7a2f978b | 1429 | } |
1430 | ||
038eb4ed | 1431 | /* |
99edd1c3 | 1432 | * client issued a request with an only-if-cached cache-control directive; |
038eb4ed | 1433 | * we did not find a cached object that can be returned without |
99edd1c3 | 1434 | * contacting other servers; |
038eb4ed | 1435 | * respond with a 504 (Gateway Timeout) as suggested in [RFC 2068] |
1436 | */ | |
1437 | static void | |
1438 | clientProcessOnlyIfCachedMiss(clientHttpRequest * http) | |
1439 | { | |
1440 | char *url = http->uri; | |
1441 | request_t *r = http->request; | |
1442 | ErrorState *err = NULL; | |
1443 | debug(33, 4) ("clientProcessOnlyIfCachedMiss: '%s %s'\n", | |
1444 | RequestMethodStr[r->method], url); | |
038eb4ed | 1445 | http->al.http.code = HTTP_GATEWAY_TIMEOUT; |
1446 | err = errorCon(ERR_ONLY_IF_CACHED_MISS, HTTP_GATEWAY_TIMEOUT); | |
1447 | err->request = requestLink(r); | |
1448 | err->src_addr = http->conn->peer.sin_addr; | |
1449 | http->entry = clientCreateStoreEntry(http, r->method, 0); | |
1450 | errorAppendEntry(http->entry, err); | |
1451 | } | |
1452 | ||
50ddd7a4 | 1453 | static log_type |
1454 | clientProcessRequest2(clientHttpRequest * http) | |
1455 | { | |
1456 | const request_t *r = http->request; | |
23d92c64 | 1457 | const cache_key *key = storeKeyPublic(http->uri, r->method); |
50ddd7a4 | 1458 | StoreEntry *e; |
57b1ff70 | 1459 | e = http->entry = storeGet(key); |
6cfa8966 | 1460 | #if USE_CACHE_DIGESTS |
57b1ff70 | 1461 | http->lookup_type = e ? "HIT" : "MISS"; |
1ca847dd | 1462 | #endif |
57b1ff70 | 1463 | if (!e) { |
50ddd7a4 | 1464 | /* this object isn't in the cache */ |
1465 | return LOG_TCP_MISS; | |
1466 | } else if (EBIT_TEST(e->flag, ENTRY_SPECIAL)) { | |
12784378 | 1467 | /* ideally, special entries should be processed later, |
1468 | * so we can use std processing routines for IMS and such */ | |
57b1ff70 | 1469 | if (EBIT_TEST(r->flags, REQ_IMS) && e->lastmod <= r->ims) |
12784378 | 1470 | return LOG_TCP_IMS_HIT; |
17b6e784 | 1471 | else if (e->mem_status == IN_MEMORY) |
50ddd7a4 | 1472 | return LOG_TCP_MEM_HIT; |
1473 | else | |
1474 | return LOG_TCP_HIT; | |
1475 | } else if (!storeEntryValidToSend(e)) { | |
1476 | storeRelease(e); | |
1477 | http->entry = NULL; | |
1478 | return LOG_TCP_MISS; | |
1479 | } else if (EBIT_TEST(r->flags, REQ_NOCACHE)) { | |
1480 | /* NOCACHE should always eject a negative cached object */ | |
1481 | if (EBIT_TEST(e->flag, ENTRY_NEGCACHED)) | |
1482 | storeRelease(e); | |
1483 | /* NOCACHE+IMS should not eject a valid object */ | |
1484 | else if (EBIT_TEST(r->flags, REQ_IMS)) | |
1485 | (void) 0; | |
1486 | /* Request-Range should not eject a valid object */ | |
1487 | else if (EBIT_TEST(r->flags, REQ_RANGE)) | |
1488 | (void) 0; | |
1489 | else | |
1490 | storeRelease(e); | |
1491 | ipcacheReleaseInvalid(r->host); | |
1492 | http->entry = NULL; | |
ee1679df | 1493 | return LOG_TCP_CLIENT_REFRESH_MISS; |
50ddd7a4 | 1494 | } else if (checkNegativeHit(e)) { |
1495 | return LOG_TCP_NEGATIVE_HIT; | |
1496 | } else if (refreshCheck(e, r, 0)) { | |
1497 | /* The object is in the cache, but it needs to be validated. Use | |
1498 | * LOG_TCP_REFRESH_MISS for the time being, maybe change it to | |
1b02b5be | 1499 | * _HIT later in clientHandleIMSReply() */ |
50ddd7a4 | 1500 | if (r->protocol == PROTO_HTTP) |
1501 | return LOG_TCP_REFRESH_MISS; | |
1502 | else | |
1503 | return LOG_TCP_MISS; /* XXX zoinks */ | |
1504 | } else if (EBIT_TEST(r->flags, REQ_IMS)) { | |
1505 | /* User-initiated IMS request for something we think is valid */ | |
1506 | return LOG_TCP_IMS_MISS; | |
1507 | } else if (e->mem_status == IN_MEMORY) { | |
1508 | return LOG_TCP_MEM_HIT; | |
1509 | } else { | |
1510 | return LOG_TCP_HIT; | |
1511 | } | |
1512 | } | |
1513 | ||
4c323c5f | 1514 | static void |
fb63215a | 1515 | clientProcessRequest(clientHttpRequest * http) |
7a2f978b | 1516 | { |
23d92c64 | 1517 | char *url = http->uri; |
7a2f978b | 1518 | StoreEntry *entry = NULL; |
50ddd7a4 | 1519 | request_t *r = http->request; |
fb63215a | 1520 | int fd = http->conn->fd; |
1bea1d83 | 1521 | HttpReply *rep; |
93f9abd0 | 1522 | debug(33, 4) ("clientProcessRequest: %s '%s'\n", |
50ddd7a4 | 1523 | RequestMethodStr[r->method], |
7a2f978b | 1524 | url); |
fb63215a | 1525 | if (r->method == METHOD_CONNECT) { |
7a2f978b | 1526 | http->log_type = LOG_TCP_MISS; |
ea0efb98 | 1527 | sslStart(fd, url, r, &http->out.size); |
1528 | return; | |
fb63215a | 1529 | } else if (r->method == METHOD_PURGE) { |
ea0efb98 | 1530 | clientPurgeRequest(http); |
1531 | return; | |
fb63215a | 1532 | } else if (r->method == METHOD_TRACE) { |
50ddd7a4 | 1533 | if (r->max_forwards == 0) { |
b17b22eb | 1534 | http->entry = clientCreateStoreEntry(http, r->method, 0); |
1535 | storeReleaseRequest(http->entry); | |
1536 | storeBuffer(http->entry); | |
1bea1d83 | 1537 | rep = httpReplyCreate(); |
31be8b80 | 1538 | httpReplySetHeaders(rep, 1.0, HTTP_OK, NULL, "text/plain", |
99edd1c3 | 1539 | r->prefix_sz, 0, squid_curtime); |
1bea1d83 | 1540 | httpReplySwapOut(rep, http->entry); |
1541 | httpReplyDestroy(rep); | |
99edd1c3 | 1542 | storeAppend(http->entry, r->prefix, r->prefix_sz); |
b17b22eb | 1543 | storeComplete(http->entry); |
7a2f978b | 1544 | return; |
1545 | } | |
1546 | /* yes, continue */ | |
6addbd81 | 1547 | http->log_type = LOG_TCP_MISS; |
efb9218c | 1548 | } else if (pumpMethod(r->method)) { |
fb63215a | 1549 | http->log_type = LOG_TCP_MISS; |
31be8b80 | 1550 | /* XXX oof, POST can be cached! */ |
54220df8 | 1551 | pumpInit(fd, r, http->uri); |
31be8b80 | 1552 | } else { |
efb9218c | 1553 | http->log_type = clientProcessRequest2(http); |
7a2f978b | 1554 | } |
93f9abd0 | 1555 | debug(33, 4) ("clientProcessRequest: %s for '%s'\n", |
7a2f978b | 1556 | log_tags[http->log_type], |
23d92c64 | 1557 | http->uri); |
50ddd7a4 | 1558 | if ((entry = http->entry) != NULL) { |
7a2f978b | 1559 | storeLockObject(entry); |
23d92c64 | 1560 | storeCreateMemObject(entry, http->uri, http->log_uri); |
7a2f978b | 1561 | storeClientListAdd(entry, http); |
1562 | } | |
7a2f978b | 1563 | http->out.offset = 0; |
1564 | switch (http->log_type) { | |
1565 | case LOG_TCP_HIT: | |
1566 | case LOG_TCP_NEGATIVE_HIT: | |
1567 | case LOG_TCP_MEM_HIT: | |
1568 | entry->refcount++; /* HIT CASE */ | |
0e473d70 | 1569 | if (entry->store_status == STORE_ABORTED) |
6cf028ab | 1570 | debug(33, 0) ("clientProcessRequest: entry->swap_status == STORE_ABORTED\n"); |
7a2f978b | 1571 | storeClientCopy(entry, |
1572 | http->out.offset, | |
1573 | http->out.offset, | |
1574 | SM_PAGE_SIZE, | |
7021844c | 1575 | memAllocate(MEM_4K_BUF), |
7a2f978b | 1576 | clientCacheHit, |
1577 | http); | |
038eb4ed | 1578 | return; |
2920225f | 1579 | case LOG_TCP_IMS_HIT: |
7a2f978b | 1580 | case LOG_TCP_IMS_MISS: |
0e473d70 | 1581 | if (entry->store_status == STORE_ABORTED) |
6cf028ab | 1582 | debug(33, 0) ("clientProcessRequest 2: entry->swap_status == STORE_ABORTED\n"); |
7a2f978b | 1583 | storeClientCopy(entry, |
1584 | http->out.offset, | |
1585 | http->out.offset, | |
1586 | SM_PAGE_SIZE, | |
7021844c | 1587 | memAllocate(MEM_4K_BUF), |
ea285003 | 1588 | (http->log_type == LOG_TCP_IMS_MISS) ? |
1589 | clientGetHeadersForIMS : clientGetHeadersForSpecialIMS, | |
7a2f978b | 1590 | http); |
1591 | break; | |
1592 | case LOG_TCP_REFRESH_MISS: | |
fb63215a | 1593 | clientProcessExpired(http); |
7a2f978b | 1594 | break; |
1595 | default: | |
fb63215a | 1596 | clientProcessMiss(http); |
7a2f978b | 1597 | break; |
1598 | } | |
1599 | } | |
1600 | ||
1601 | /* | |
1602 | * Prepare to fetch the object as it's a cache miss of some kind. | |
1603 | */ | |
1604 | static void | |
fb63215a | 1605 | clientProcessMiss(clientHttpRequest * http) |
7a2f978b | 1606 | { |
23d92c64 | 1607 | char *url = http->uri; |
f44af445 | 1608 | request_t *r = http->request; |
7a2f978b | 1609 | aclCheck_t ch; |
1610 | int answer; | |
1611 | ErrorState *err = NULL; | |
93f9abd0 | 1612 | debug(33, 4) ("clientProcessMiss: '%s %s'\n", |
f44af445 | 1613 | RequestMethodStr[r->method], url); |
99edd1c3 | 1614 | debug(33, 10) ("clientProcessMiss: prefix:\n%s\n", r->prefix); |
79e0dc20 | 1615 | /* |
1616 | * We might have a left-over StoreEntry from a failed cache hit | |
1617 | * or IMS request. | |
1618 | */ | |
1619 | if (http->entry) { | |
12784378 | 1620 | if (EBIT_TEST(http->entry->flag, ENTRY_SPECIAL)) |
1621 | debug(33, 0) ("clientProcessMiss: miss on a special object (%s).\n", url); | |
79e0dc20 | 1622 | storeUnregister(http->entry, http); |
1623 | storeUnlockObject(http->entry); | |
1624 | http->entry = NULL; | |
1625 | } | |
7c1d4010 | 1626 | if (clientOnlyIfCached(http)) { |
1627 | clientProcessOnlyIfCachedMiss(http); | |
1628 | return; | |
1629 | } | |
9330543e | 1630 | /* |
1631 | * Deny loops when running in accelerator/transproxy mode. | |
1632 | */ | |
1633 | if (http->flags.accel && EBIT_TEST(r->flags, REQ_LOOPDETECT)) { | |
1634 | http->al.http.code = HTTP_FORBIDDEN; | |
1635 | err = errorCon(ERR_ACCESS_DENIED, HTTP_FORBIDDEN); | |
1636 | err->request = requestLink(r); | |
1637 | err->src_addr = http->conn->peer.sin_addr; | |
1638 | http->entry = clientCreateStoreEntry(http, r->method, 0); | |
1639 | errorAppendEntry(http->entry, err); | |
1640 | return; | |
1641 | } | |
79e0dc20 | 1642 | /* |
1643 | * Check if this host is allowed to fetch MISSES from us (miss_access) | |
1644 | */ | |
7a2f978b | 1645 | memset(&ch, '\0', sizeof(aclCheck_t)); |
1646 | ch.src_addr = http->conn->peer.sin_addr; | |
f44af445 | 1647 | ch.request = r; |
7a2f978b | 1648 | answer = aclCheckFast(Config.accessList.miss, &ch); |
1da5651f | 1649 | if (answer == 0) { |
7a2f978b | 1650 | http->al.http.code = HTTP_FORBIDDEN; |
bdb3c273 | 1651 | err = errorCon(ERR_FORWARDING_DENIED, HTTP_FORBIDDEN); |
f44af445 | 1652 | err->request = requestLink(r); |
7a2f978b | 1653 | err->src_addr = http->conn->peer.sin_addr; |
f44af445 | 1654 | http->entry = clientCreateStoreEntry(http, r->method, 0); |
79e0dc20 | 1655 | errorAppendEntry(http->entry, err); |
7a2f978b | 1656 | return; |
1657 | } | |
79e0dc20 | 1658 | assert(http->out.offset == 0); |
f44af445 | 1659 | http->entry = clientCreateStoreEntry(http, r->method, r->flags); |
79e0dc20 | 1660 | http->entry->refcount++; |
1da5651f | 1661 | if (http->flags.internal) |
1662 | r->protocol = PROTO_INTERNAL; | |
f44af445 | 1663 | protoDispatch(http->conn->fd, http->entry, r); |
7a2f978b | 1664 | } |
1665 | ||
99edd1c3 | 1666 | static clientHttpRequest * |
1667 | parseHttpRequestAbort(ConnStateData * conn, const char *uri) | |
1668 | { | |
1669 | clientHttpRequest *http = xcalloc(1, sizeof(clientHttpRequest)); | |
1670 | cbdataAdd(http, MEM_NONE); | |
1671 | http->conn = conn; | |
1672 | http->start = current_time; | |
1673 | http->req_sz = conn->in.offset; | |
1674 | http->uri = xstrdup(uri); | |
1675 | http->log_uri = xstrdup(uri); | |
1676 | return http; | |
1677 | } | |
1678 | ||
7a2f978b | 1679 | /* |
1680 | * parseHttpRequest() | |
1681 | * | |
1682 | * Returns | |
1683 | * NULL on error or incomplete request | |
1684 | * a clientHttpRequest structure on success | |
1685 | */ | |
1686 | static clientHttpRequest * | |
1687 | parseHttpRequest(ConnStateData * conn, method_t * method_p, int *status, | |
ea285003 | 1688 | char **prefix_p, size_t * req_line_sz_p) |
7a2f978b | 1689 | { |
1690 | char *inbuf = NULL; | |
1691 | char *mstr = NULL; | |
1692 | char *url = NULL; | |
1693 | char *req_hdr = NULL; | |
7a2f978b | 1694 | float http_ver; |
1695 | char *token = NULL; | |
1696 | char *t = NULL; | |
2334c194 | 1697 | char *end; |
7a2f978b | 1698 | int free_request = 0; |
1699 | size_t header_sz; /* size of headers, not including first line */ | |
ea285003 | 1700 | size_t prefix_sz; /* size of whole request (req-line + headers) */ |
7a2f978b | 1701 | size_t url_sz; |
1702 | method_t method; | |
1703 | clientHttpRequest *http = NULL; | |
1704 | ||
1705 | /* Make sure a complete line has been received */ | |
99edd1c3 | 1706 | if ((t = strchr(conn->in.buf, '\n')) == NULL) { |
93f9abd0 | 1707 | debug(33, 5) ("Incomplete request line, waiting for more data\n"); |
7a2f978b | 1708 | *status = 0; |
1709 | return NULL; | |
1710 | } | |
99edd1c3 | 1711 | *req_line_sz_p = t - conn->in.buf; |
7a2f978b | 1712 | /* Use xmalloc/xmemcpy instead of xstrdup because inbuf might |
1713 | * contain NULL bytes; especially for POST data */ | |
1714 | inbuf = xmalloc(conn->in.offset + 1); | |
1715 | xmemcpy(inbuf, conn->in.buf, conn->in.offset); | |
1716 | *(inbuf + conn->in.offset) = '\0'; | |
1717 | ||
99edd1c3 | 1718 | /* pre-set these values to make aborting simpler */ |
1719 | *prefix_p = inbuf; | |
1720 | *method_p = METHOD_NONE; | |
1721 | *status = -1; | |
1722 | ||
7a2f978b | 1723 | /* Look for request method */ |
1724 | if ((mstr = strtok(inbuf, "\t ")) == NULL) { | |
93f9abd0 | 1725 | debug(33, 1) ("parseHttpRequest: Can't get request method\n"); |
99edd1c3 | 1726 | return parseHttpRequestAbort(conn, "error:invalid-request-method"); |
7a2f978b | 1727 | } |
1728 | method = urlParseMethod(mstr); | |
1729 | if (method == METHOD_NONE) { | |
93f9abd0 | 1730 | debug(33, 1) ("parseHttpRequest: Unsupported method '%s'\n", mstr); |
99edd1c3 | 1731 | return parseHttpRequestAbort(conn, "error:unsupported-request-method"); |
7a2f978b | 1732 | } |
93f9abd0 | 1733 | debug(33, 5) ("parseHttpRequest: Method is '%s'\n", mstr); |
3775d53c | 1734 | *method_p = method; |
7a2f978b | 1735 | |
1736 | /* look for URL */ | |
1737 | if ((url = strtok(NULL, "\r\n\t ")) == NULL) { | |
93f9abd0 | 1738 | debug(33, 1) ("parseHttpRequest: Missing URL\n"); |
99edd1c3 | 1739 | return parseHttpRequestAbort(conn, "error:missing-url"); |
7a2f978b | 1740 | } |
93f9abd0 | 1741 | debug(33, 5) ("parseHttpRequest: Request is '%s'\n", url); |
7a2f978b | 1742 | |
1743 | token = strtok(NULL, null_string); | |
1744 | for (t = token; t && *t && *t != '\n' && *t != '\r'; t++); | |
46c7dbf0 | 1745 | if (t == NULL || *t == '\0' || t == token || strncmp(token, "HTTP/", 5)) { |
93f9abd0 | 1746 | debug(33, 3) ("parseHttpRequest: Missing HTTP identifier\n"); |
46052490 | 1747 | #if RELAXED_HTTP_PARSER |
1748 | http_ver = (float) 0.9; /* wild guess */ | |
1749 | #else | |
99edd1c3 | 1750 | return parseHttpRequestAbort(conn, "error:missing-http-ident"); |
7518fce5 | 1751 | #endif |
99edd1c3 | 1752 | } else { |
7518fce5 | 1753 | http_ver = (float) atof(token + 5); |
99edd1c3 | 1754 | } |
7a2f978b | 1755 | |
1756 | /* Check if headers are received */ | |
754b9ce9 | 1757 | req_hdr = t; |
8d9810cd | 1758 | header_sz = headersEnd(req_hdr, conn->in.offset - (req_hdr - inbuf)); |
2334c194 | 1759 | if (0 == header_sz) { |
1a92a1e2 | 1760 | debug(33, 3) ("parseHttpRequest: header_sz == 0\n"); |
7a2f978b | 1761 | xfree(inbuf); |
1762 | *status = 0; | |
1763 | return NULL; | |
1764 | } | |
754b9ce9 | 1765 | /* |
99edd1c3 | 1766 | * Skip whitespace at the end of the first line, up to the |
754b9ce9 | 1767 | * first newline. |
1768 | */ | |
1769 | while (isspace(*req_hdr)) { | |
1770 | header_sz--; | |
1771 | if (*(req_hdr++) == '\n') | |
1772 | break; | |
1773 | } | |
1774 | assert(header_sz > 0); | |
1775 | debug(33, 3) ("parseHttpRequest: req_hdr = {%s}\n", req_hdr); | |
2334c194 | 1776 | end = req_hdr + header_sz; |
04990e2d | 1777 | debug(33, 3) ("parseHttpRequest: end = {%s}\n", end); |
99edd1c3 | 1778 | |
1779 | #if UNREACHABLE_CODE | |
1780 | if (end <= req_hdr) { | |
1781 | /* Invalid request */ | |
1782 | debug(33, 3) ("parseHttpRequest: No request headers?\n"); | |
1783 | return parseHttpRequestAbort(conn, "error:no-request-headers"); | |
1784 | } | |
1785 | #endif | |
1786 | prefix_sz = end - inbuf; | |
1787 | *req_line_sz_p = req_hdr - inbuf; | |
ea285003 | 1788 | debug(33, 3) ("parseHttpRequest: prefix_sz = %d, req_line_sz = %d\n", |
99edd1c3 | 1789 | (int) prefix_sz, (int) *req_line_sz_p); |
1790 | assert(prefix_sz <= conn->in.offset); | |
7a2f978b | 1791 | |
1792 | /* Ok, all headers are received */ | |
1793 | http = xcalloc(1, sizeof(clientHttpRequest)); | |
3f6c0fb2 | 1794 | cbdataAdd(http, MEM_NONE); |
7a2f978b | 1795 | http->http_ver = http_ver; |
1796 | http->conn = conn; | |
1797 | http->start = current_time; | |
99edd1c3 | 1798 | http->req_sz = prefix_sz; |
1799 | *prefix_p = xmalloc(prefix_sz + 1); | |
1800 | xmemcpy(*prefix_p, conn->in.buf, prefix_sz); | |
1801 | *(*prefix_p + prefix_sz) = '\0'; | |
7a2f978b | 1802 | |
ea285003 | 1803 | debug(33, 5) ("parseHttpRequest: Request Header is\n%s\n", (*prefix_p) + *req_line_sz_p); |
23d92c64 | 1804 | /* Assign http->uri */ |
7a2f978b | 1805 | if ((t = strchr(url, '\n'))) /* remove NL */ |
1806 | *t = '\0'; | |
1807 | if ((t = strchr(url, '\r'))) /* remove CR */ | |
1808 | *t = '\0'; | |
1809 | if ((t = strchr(url, '#'))) /* remove HTML anchors */ | |
1810 | *t = '\0'; | |
1811 | ||
4162ee3b | 1812 | /* handle internal objects */ |
1da5651f | 1813 | if (internalCheck(url)) { |
4162ee3b | 1814 | /* prepend our name & port */ |
1da5651f | 1815 | http->uri = xstrdup(internalLocalUri(NULL, url)); |
77ed547a | 1816 | http->flags.internal = 1; |
4162ee3b | 1817 | } |
7a2f978b | 1818 | /* see if we running in Config2.Accel.on, if so got to convert it to URL */ |
4162ee3b | 1819 | else if (Config2.Accel.on && *url == '/') { |
7a2f978b | 1820 | /* prepend the accel prefix */ |
dbfed404 | 1821 | if (opt_accel_uses_host && (t = mime_get_header(req_hdr, "Host"))) { |
7a2f978b | 1822 | /* If a Host: header was specified, use it to build the URL |
1823 | * instead of the one in the Config file. */ | |
1824 | /* | |
1825 | * XXX Use of the Host: header here opens a potential | |
1826 | * security hole. There are no checks that the Host: value | |
1827 | * corresponds to one of your servers. It might, for example, | |
1828 | * refer to www.playboy.com. The 'dst' and/or 'dst_domain' ACL | |
1829 | * types should be used to prevent httpd-accelerators | |
1830 | * handling requests for non-local servers */ | |
1831 | strtok(t, " :/;@"); | |
12fc602c | 1832 | url_sz = strlen(url) + 32 + Config.appendDomainLen + |
1833 | strlen(t); | |
23d92c64 | 1834 | http->uri = xcalloc(url_sz, 1); |
1835 | snprintf(http->uri, url_sz, "http://%s:%d%s", | |
7a2f978b | 1836 | t, (int) Config.Accel.port, url); |
dbfed404 | 1837 | } else if (vhost_mode) { |
1838 | /* Put the local socket IP address as the hostname */ | |
1839 | url_sz = strlen(url) + 32 + Config.appendDomainLen; | |
1840 | http->uri = xcalloc(url_sz, 1); | |
1841 | snprintf(http->uri, url_sz, "http://%s:%d%s", | |
1842 | inet_ntoa(http->conn->me.sin_addr), | |
1843 | (int) Config.Accel.port, | |
1844 | url); | |
93f9abd0 | 1845 | debug(33, 5) ("VHOST REWRITE: '%s'\n", http->uri); |
7a2f978b | 1846 | } else { |
1847 | url_sz = strlen(Config2.Accel.prefix) + strlen(url) + | |
1848 | Config.appendDomainLen + 1; | |
23d92c64 | 1849 | http->uri = xcalloc(url_sz, 1); |
1850 | snprintf(http->uri, url_sz, "%s%s", Config2.Accel.prefix, url); | |
7a2f978b | 1851 | } |
77ed547a | 1852 | http->flags.accel = 1; |
7a2f978b | 1853 | } else { |
1854 | /* URL may be rewritten later, so make extra room */ | |
1855 | url_sz = strlen(url) + Config.appendDomainLen + 5; | |
23d92c64 | 1856 | http->uri = xcalloc(url_sz, 1); |
1857 | strcpy(http->uri, url); | |
77ed547a | 1858 | http->flags.accel = 0; |
7a2f978b | 1859 | } |
23d92c64 | 1860 | http->log_uri = xstrdup(http->uri); |
93f9abd0 | 1861 | debug(33, 5) ("parseHttpRequest: Complete request received\n"); |
7a2f978b | 1862 | if (free_request) |
1863 | safe_free(url); | |
1864 | xfree(inbuf); | |
7a2f978b | 1865 | *status = 1; |
1866 | return http; | |
1867 | } | |
1868 | ||
1869 | static int | |
79d39a72 | 1870 | clientReadDefer(int fdnotused, void *data) |
7a2f978b | 1871 | { |
1872 | ConnStateData *conn = data; | |
1873 | return conn->defer.until > squid_curtime; | |
1874 | } | |
1875 | ||
1876 | static void | |
1877 | clientReadRequest(int fd, void *data) | |
1878 | { | |
1879 | ConnStateData *conn = data; | |
1880 | int parser_return_code = 0; | |
1881 | int k; | |
1882 | request_t *request = NULL; | |
7a2f978b | 1883 | int size; |
7a2f978b | 1884 | method_t method; |
1885 | clientHttpRequest *http = NULL; | |
1886 | clientHttpRequest **H = NULL; | |
99edd1c3 | 1887 | char *prefix; |
7a2f978b | 1888 | ErrorState *err = NULL; |
1889 | fde *F = &fd_table[fd]; | |
44db45e8 | 1890 | int len = conn->in.size - conn->in.offset - 1; |
93f9abd0 | 1891 | debug(33, 4) ("clientReadRequest: FD %d: reading request...\n", fd); |
7a2f978b | 1892 | size = read(fd, conn->in.buf + conn->in.offset, len); |
d8b83480 | 1893 | if (size > 0) { |
ea285003 | 1894 | fd_bytes(fd, size, FD_READ); |
1895 | kb_incr(&Counter.client_http.kbytes_in, size); | |
d8b83480 | 1896 | } |
44db45e8 | 1897 | /* |
1898 | * Don't reset the timeout value here. The timeout value will be | |
1899 | * set to Config.Timeout.request by httpAccept() and | |
1900 | * clientWriteComplete(), and should apply to the request as a | |
1901 | * whole, not individual read() calls. Plus, it breaks our | |
1902 | * lame half-close detection | |
1903 | */ | |
1904 | commSetSelect(fd, COMM_SELECT_READ, clientReadRequest, conn, 0); | |
7a2f978b | 1905 | if (size == 0) { |
1906 | if (conn->chr == NULL) { | |
1907 | /* no current or pending requests */ | |
1908 | comm_close(fd); | |
1909 | return; | |
ea285003 | 1910 | } else if (!Config.onoff.half_closed_clients) { |
1911 | /* admin doesn't want to support half-closed client sockets */ | |
1912 | comm_close(fd); | |
1913 | return; | |
7a2f978b | 1914 | } |
1915 | /* It might be half-closed, we can't tell */ | |
93f9abd0 | 1916 | debug(33, 5) ("clientReadRequest: FD %d closed?\n", fd); |
58a6c186 | 1917 | F->flags.socket_eof = 1; |
7a2f978b | 1918 | conn->defer.until = squid_curtime + 1; |
1919 | conn->defer.n++; | |
44db45e8 | 1920 | fd_note(fd, "half-closed"); |
7a2f978b | 1921 | return; |
1922 | } else if (size < 0) { | |
6d3caf23 | 1923 | if (!ignoreErrno(errno)) { |
7a2f978b | 1924 | debug(50, 2) ("clientReadRequest: FD %d: %s\n", fd, xstrerror()); |
1925 | comm_close(fd); | |
ebf4efff | 1926 | return; |
47130615 | 1927 | } else if (conn->in.offset == 0) { |
7c1d4010 | 1928 | debug(50, 2) ("clientReadRequest: FD %d: no data to process (%s)\n", fd, xstrerror()); |
ebf4efff | 1929 | return; |
7a2f978b | 1930 | } |
ebf4efff | 1931 | /* Continue to process previously read data */ |
47130615 | 1932 | size = 0; |
7a2f978b | 1933 | } |
1934 | conn->in.offset += size; | |
5ede6c8f | 1935 | /* Skip leading (and trailing) whitespace */ |
1936 | while (conn->in.offset > 0 && isspace(conn->in.buf[0])) { | |
1937 | xmemmove(conn->in.buf, conn->in.buf + 1, conn->in.offset - 1); | |
1938 | conn->in.offset--; | |
1939 | } | |
7a2f978b | 1940 | conn->in.buf[conn->in.offset] = '\0'; /* Terminate the string */ |
7a2f978b | 1941 | while (conn->in.offset > 0) { |
ebf4efff | 1942 | int nrequests; |
cff0c749 | 1943 | size_t req_line_sz; |
ebf4efff | 1944 | /* Limit the number of concurrent requests to 2 */ |
1945 | for (H = &conn->chr, nrequests = 0; *H; H = &(*H)->next, nrequests++); | |
1946 | if (nrequests >= 2) { | |
93f9abd0 | 1947 | debug(33, 2) ("clientReadRequest: FD %d max concurrent requests reached\n", fd); |
1948 | debug(33, 5) ("clientReadRequest: FD %d defering new request until one is done\n", fd); | |
47130615 | 1949 | conn->defer.until = squid_curtime + 100; /* Reset when a request is complete */ |
ebf4efff | 1950 | break; |
1951 | } | |
1952 | /* Process request */ | |
7a2f978b | 1953 | http = parseHttpRequest(conn, |
1954 | &method, | |
1955 | &parser_return_code, | |
99edd1c3 | 1956 | &prefix, |
1957 | &req_line_sz); | |
7a2f978b | 1958 | if (http) { |
1959 | assert(http->req_sz > 0); | |
1960 | conn->in.offset -= http->req_sz; | |
1961 | assert(conn->in.offset >= 0); | |
6fa92aa2 | 1962 | /* |
1963 | * If we read past the end of this request, move the remaining | |
1964 | * data to the beginning | |
1965 | */ | |
1966 | if (conn->in.offset > 0) | |
dbfed404 | 1967 | xmemmove(conn->in.buf, conn->in.buf + http->req_sz, conn->in.offset); |
ebf4efff | 1968 | /* add to the client request queue */ |
7a2f978b | 1969 | for (H = &conn->chr; *H; H = &(*H)->next); |
1970 | *H = http; | |
1971 | conn->nrequests++; | |
1972 | commSetTimeout(fd, Config.Timeout.lifetime, NULL, NULL); | |
3775d53c | 1973 | if (parser_return_code < 0) { |
93f9abd0 | 1974 | debug(33, 1) ("clientReadRequest: FD %d Invalid Request\n", fd); |
3775d53c | 1975 | err = errorCon(ERR_INVALID_REQ, HTTP_BAD_REQUEST); |
1976 | err->request_hdrs = xstrdup(conn->in.buf); | |
1977 | http->entry = clientCreateStoreEntry(http, method, 0); | |
1978 | errorAppendEntry(http->entry, err); | |
1979 | break; | |
1980 | } | |
23d92c64 | 1981 | if ((request = urlParse(method, http->uri)) == NULL) { |
93f9abd0 | 1982 | debug(33, 5) ("Invalid URL: %s\n", http->uri); |
7a2f978b | 1983 | err = errorCon(ERR_INVALID_URL, HTTP_BAD_REQUEST); |
1984 | err->src_addr = conn->peer.sin_addr; | |
23d92c64 | 1985 | err->url = xstrdup(http->uri); |
7a2f978b | 1986 | http->al.http.code = err->http_status; |
f44af445 | 1987 | http->entry = clientCreateStoreEntry(http, method, 0); |
79e0dc20 | 1988 | errorAppendEntry(http->entry, err); |
99edd1c3 | 1989 | safe_free(prefix); |
7a2f978b | 1990 | break; |
99edd1c3 | 1991 | } else { |
1992 | /* compile headers */ | |
1993 | /* we should skip request line! */ | |
ea285003 | 1994 | if (!httpRequestParseHeader(request, prefix + req_line_sz)) |
99edd1c3 | 1995 | debug(33, 1) ("Failed to parse request headers: %s\n%s\n", |
1996 | http->uri, prefix); | |
1997 | /* continue anyway? */ | |
7a2f978b | 1998 | } |
ba26bca4 | 1999 | if (!http->flags.internal) { |
2000 | if (internalCheck(strBuf(request->urlpath))) { | |
2001 | if (0 == strcasecmp(request->host, getMyHostname())) { | |
4b4cd312 | 2002 | if (request->port == Config.Port.http->i) |
2003 | http->flags.internal = 1; | |
ba26bca4 | 2004 | } else if (internalStaticCheck(strBuf(request->urlpath))) { |
5999b776 | 2005 | xstrncpy(request->host, getMyHostname(), SQUIDHOSTNAMELEN); |
2006 | request->port = Config.Port.http->i; | |
2007 | http->flags.internal = 1; | |
ba26bca4 | 2008 | } |
2009 | } | |
2010 | } | |
23d92c64 | 2011 | safe_free(http->log_uri); |
2012 | http->log_uri = xstrdup(urlCanonicalClean(request)); | |
7a2f978b | 2013 | request->client_addr = conn->peer.sin_addr; |
2014 | request->http_ver = http->http_ver; | |
99edd1c3 | 2015 | request->prefix = prefix; |
2016 | request->prefix_sz = http->req_sz; | |
7a2f978b | 2017 | if (!urlCheckRequest(request)) { |
2018 | err = errorCon(ERR_UNSUP_REQ, HTTP_NOT_IMPLEMENTED); | |
2019 | err->src_addr = conn->peer.sin_addr; | |
7a2f978b | 2020 | err->request = requestLink(request); |
2021 | http->al.http.code = err->http_status; | |
f44af445 | 2022 | http->entry = clientCreateStoreEntry(http, request->method, 0); |
79e0dc20 | 2023 | errorAppendEntry(http->entry, err); |
3775d53c | 2024 | break; |
7a2f978b | 2025 | } |
31be8b80 | 2026 | if (0 == clientCheckContentLength(request)) { |
2027 | err = errorCon(ERR_INVALID_REQ, HTTP_LENGTH_REQUIRED); | |
2028 | err->src_addr = conn->peer.sin_addr; | |
2029 | err->request = requestLink(request); | |
2030 | http->al.http.code = err->http_status; | |
2031 | http->entry = clientCreateStoreEntry(http, request->method, 0); | |
2032 | errorAppendEntry(http->entry, err); | |
2033 | break; | |
2034 | } | |
7a2f978b | 2035 | http->request = requestLink(request); |
cf26e54c | 2036 | clientAccessCheck(http); |
3775d53c | 2037 | /* |
2038 | * break here for NON-GET because most likely there is a | |
7a2f978b | 2039 | * reqeust body following and we don't want to parse it |
3775d53c | 2040 | * as though it was new request |
2041 | */ | |
7a2f978b | 2042 | if (request->method != METHOD_GET) { |
2043 | if (conn->in.offset) { | |
2044 | request->body_sz = conn->in.offset; | |
2045 | request->body = xmalloc(request->body_sz); | |
2046 | xmemcpy(request->body, conn->in.buf, request->body_sz); | |
2047 | conn->in.offset = 0; | |
2048 | } | |
2049 | break; | |
2050 | } | |
7a2f978b | 2051 | continue; /* while offset > 0 */ |
2052 | } else if (parser_return_code == 0) { | |
2053 | /* | |
2054 | * Partial request received; reschedule until parseHttpRequest() | |
2055 | * is happy with the input | |
2056 | */ | |
2057 | k = conn->in.size - 1 - conn->in.offset; | |
2058 | if (k == 0) { | |
2059 | if (conn->in.offset >= Config.maxRequestSize) { | |
2060 | /* The request is too large to handle */ | |
93f9abd0 | 2061 | debug(33, 0) ("Request won't fit in buffer.\n"); |
2062 | debug(33, 0) ("Config 'request_size'= %d bytes.\n", | |
7a2f978b | 2063 | Config.maxRequestSize); |
93f9abd0 | 2064 | debug(33, 0) ("This request = %d bytes.\n", |
5f6ac48b | 2065 | (int) conn->in.offset); |
7a2f978b | 2066 | err = errorCon(ERR_INVALID_REQ, HTTP_REQUEST_ENTITY_TOO_LARGE); |
f44af445 | 2067 | http->entry = clientCreateStoreEntry(http, request->method, 0); |
79e0dc20 | 2068 | errorAppendEntry(http->entry, err); |
7a2f978b | 2069 | return; |
2070 | } | |
2071 | /* Grow the request memory area to accomodate for a large request */ | |
2072 | conn->in.size += REQUEST_BUF_SIZE; | |
2073 | conn->in.buf = xrealloc(conn->in.buf, conn->in.size); | |
59c4d35b | 2074 | /* XXX account conn->in.buf */ |
93f9abd0 | 2075 | debug(33, 2) ("Handling a large request, offset=%d inbufsize=%d\n", |
5f6ac48b | 2076 | (int) conn->in.offset, conn->in.size); |
7a2f978b | 2077 | k = conn->in.size - 1 - conn->in.offset; |
2078 | } | |
7a2f978b | 2079 | break; |
7a2f978b | 2080 | } |
2081 | } | |
2082 | } | |
2083 | ||
2084 | /* general lifetime handler for HTTP requests */ | |
2085 | static void | |
2086 | requestTimeout(int fd, void *data) | |
2087 | { | |
2088 | ConnStateData *conn = data; | |
2089 | ErrorState *err; | |
93f9abd0 | 2090 | debug(33, 2) ("requestTimeout: FD %d: lifetime is expired.\n", fd); |
7a2f978b | 2091 | if (fd_table[fd].rwstate) { |
79e0dc20 | 2092 | /* |
2093 | * Some data has been sent to the client, just close the FD | |
2094 | */ | |
7a2f978b | 2095 | comm_close(fd); |
2096 | } else if (conn->nrequests) { | |
79e0dc20 | 2097 | /* |
2098 | * assume its a persistent connection; just close it | |
2099 | */ | |
7a2f978b | 2100 | comm_close(fd); |
2101 | } else { | |
79e0dc20 | 2102 | /* |
2103 | * Generate an error | |
2104 | */ | |
7a2f978b | 2105 | err = errorCon(ERR_LIFETIME_EXP, HTTP_REQUEST_TIMEOUT); |
7a2f978b | 2106 | err->url = xstrdup("N/A"); |
79e0dc20 | 2107 | /* |
2108 | * Normally we shouldn't call errorSend() in client_side.c, but | |
2109 | * it should be okay in this case. Presumably if we get here | |
2110 | * this is the first request for the connection, and no data | |
2111 | * has been written yet | |
2112 | */ | |
2113 | assert(conn->chr == NULL); | |
7a2f978b | 2114 | errorSend(fd, err); |
79e0dc20 | 2115 | /* |
2116 | * if we don't close() here, we still need a timeout handler! | |
2117 | */ | |
7a2f978b | 2118 | commSetTimeout(fd, 30, requestTimeout, conn); |
2119 | } | |
2120 | } | |
2121 | ||
2122 | int | |
79d39a72 | 2123 | httpAcceptDefer(int fdnotused, void *notused) |
7a2f978b | 2124 | { |
3d6629c6 | 2125 | static time_t last_warn = 0; |
2126 | if (fdNFree() >= RESERVED_FD) | |
2127 | return 0; | |
2128 | if (last_warn + 15 < squid_curtime) { | |
2129 | debug(33, 0) ("WARNING! Your cache is running out of filedescriptors\n"); | |
2130 | last_warn = squid_curtime; | |
2131 | } | |
2132 | return 1; | |
7a2f978b | 2133 | } |
2134 | ||
bf8e5903 | 2135 | /* Handle a new connection on HTTP socket. */ |
7a2f978b | 2136 | void |
2137 | httpAccept(int sock, void *notused) | |
2138 | { | |
2139 | int fd = -1; | |
2140 | ConnStateData *connState = NULL; | |
2141 | struct sockaddr_in peer; | |
2142 | struct sockaddr_in me; | |
e2525655 | 2143 | int max = 10; |
2144 | while (max-- && !httpAcceptDefer(sock, notused)) { | |
2145 | memset(&peer, '\0', sizeof(struct sockaddr_in)); | |
2146 | memset(&me, '\0', sizeof(struct sockaddr_in)); | |
2147 | commSetSelect(sock, COMM_SELECT_READ, httpAccept, NULL, 0); | |
2148 | if ((fd = comm_accept(sock, &peer, &me)) < 0) { | |
2149 | if (!ignoreErrno(errno)) | |
2150 | debug(50, 1) ("httpAccept: FD %d: accept failure: %s\n", | |
2151 | sock, xstrerror()); | |
2152 | break; | |
2153 | } | |
2154 | debug(33, 4) ("httpAccept: FD %d: accepted\n", fd); | |
2155 | connState = xcalloc(1, sizeof(ConnStateData)); | |
2156 | connState->peer = peer; | |
2157 | connState->log_addr = peer.sin_addr; | |
2158 | connState->log_addr.s_addr &= Config.Addrs.client_netmask.s_addr; | |
2159 | connState->me = me; | |
2160 | connState->fd = fd; | |
2161 | connState->ident.fd = -1; | |
2162 | connState->in.size = REQUEST_BUF_SIZE; | |
2163 | connState->in.buf = xcalloc(connState->in.size, 1); | |
2164 | cbdataAdd(connState, MEM_NONE); | |
2165 | /* XXX account connState->in.buf */ | |
2166 | comm_add_close_handler(fd, connStateFree, connState); | |
2167 | if (Config.onoff.log_fqdn) | |
2168 | fqdncache_gethostbyaddr(peer.sin_addr, FQDN_LOOKUP_IF_MISS); | |
2169 | commSetTimeout(fd, Config.Timeout.request, requestTimeout, connState); | |
2170 | commSetSelect(fd, COMM_SELECT_READ, clientReadRequest, connState, 0); | |
2171 | commSetDefer(fd, clientReadDefer, connState); | |
7a2f978b | 2172 | } |
7a2f978b | 2173 | } |
2174 | ||
7a2f978b | 2175 | /* return 1 if the request should be aborted */ |
2176 | static int | |
2177 | CheckQuickAbort2(const clientHttpRequest * http) | |
2178 | { | |
4efca7da | 2179 | int curlen; |
2180 | int minlen; | |
2181 | int expectlen; | |
7a2f978b | 2182 | |
79a15e0a | 2183 | if (!EBIT_TEST(http->request->flags, REQ_CACHABLE)) |
7a2f978b | 2184 | return 1; |
79a15e0a | 2185 | if (EBIT_TEST(http->entry->flag, KEY_PRIVATE)) |
7a2f978b | 2186 | return 1; |
2187 | if (http->entry->mem_obj == NULL) | |
2188 | return 1; | |
038eb4ed | 2189 | expectlen = http->entry->mem_obj->reply->content_length; |
4efca7da | 2190 | curlen = (int) http->entry->mem_obj->inmem_hi; |
2191 | minlen = (int) Config.quickAbort.min; | |
7a2f978b | 2192 | if (minlen < 0) |
2193 | /* disabled */ | |
2194 | return 0; | |
2195 | if (curlen > expectlen) | |
2196 | /* bad content length */ | |
2197 | return 1; | |
2198 | if ((expectlen - curlen) < minlen) | |
2199 | /* only little more left */ | |
2200 | return 0; | |
2201 | if ((expectlen - curlen) > Config.quickAbort.max) | |
2202 | /* too much left to go */ | |
2203 | return 1; | |
37d0359b | 2204 | if (expectlen < 100) |
4efca7da | 2205 | /* avoid FPE */ |
2206 | return 0; | |
37d0359b | 2207 | if ((curlen / (expectlen / 100)) > Config.quickAbort.pct) |
7a2f978b | 2208 | /* past point of no return */ |
2209 | return 0; | |
2210 | return 1; | |
2211 | } | |
2212 | ||
2213 | ||
2214 | static void | |
2215 | CheckQuickAbort(clientHttpRequest * http) | |
2216 | { | |
2217 | StoreEntry *entry = http->entry; | |
2218 | /* Note, set entry here because http->entry might get changed (for IMS | |
2219 | * requests) during the storeAbort() call */ | |
2220 | if (entry == NULL) | |
2221 | return; | |
36547bcf | 2222 | if (storePendingNClients(entry) > 0) |
7a2f978b | 2223 | return; |
2224 | if (entry->store_status != STORE_PENDING) | |
2225 | return; | |
2226 | if (CheckQuickAbort2(http) == 0) | |
2227 | return; | |
93f9abd0 | 2228 | debug(33, 3) ("CheckQuickAbort: ABORTING %s\n", storeUrl(entry)); |
7a2f978b | 2229 | storeAbort(entry, 1); |
2230 | } | |
2231 | ||
978e455f | 2232 | #define SENDING_BODY 0 |
2233 | #define SENDING_HDRSONLY 1 | |
7a2f978b | 2234 | static int |
1b02b5be | 2235 | clientCheckTransferDone(clientHttpRequest * http) |
7a2f978b | 2236 | { |
978e455f | 2237 | int sending = SENDING_BODY; |
7a2f978b | 2238 | StoreEntry *entry = http->entry; |
978e455f | 2239 | MemObject *mem; |
2240 | http_reply *reply; | |
2241 | int sendlen; | |
7a2f978b | 2242 | if (entry == NULL) |
2243 | return 0; | |
978e455f | 2244 | /* |
2245 | * Handle STORE_OK and STORE_ABORTED objects. | |
07304bf9 | 2246 | * objectLen(entry) will be set proprely. |
978e455f | 2247 | */ |
2248 | if (entry->store_status != STORE_PENDING) { | |
07304bf9 | 2249 | if (http->out.offset >= objectLen(entry)) |
7a2f978b | 2250 | return 1; |
513f05a6 | 2251 | else |
2252 | return 0; | |
2253 | } | |
978e455f | 2254 | /* |
2255 | * Now, handle STORE_PENDING objects | |
2256 | */ | |
2257 | mem = entry->mem_obj; | |
2258 | assert(mem != NULL); | |
2259 | assert(http->request != NULL); | |
2260 | reply = mem->reply; | |
2261 | if (reply->hdr_sz == 0) | |
b34ed725 | 2262 | return 0; /* haven't found end of headers yet */ |
cb69b4c7 | 2263 | else if (reply->sline.status == HTTP_OK) |
b34ed725 | 2264 | sending = SENDING_BODY; |
cb69b4c7 | 2265 | else if (reply->sline.status == HTTP_NO_CONTENT) |
b34ed725 | 2266 | sending = SENDING_HDRSONLY; |
cb69b4c7 | 2267 | else if (reply->sline.status == HTTP_NOT_MODIFIED) |
b34ed725 | 2268 | sending = SENDING_HDRSONLY; |
cb69b4c7 | 2269 | else if (reply->sline.status < HTTP_OK) |
a3c60429 | 2270 | sending = SENDING_HDRSONLY; |
978e455f | 2271 | else if (http->request->method == METHOD_HEAD) |
b34ed725 | 2272 | sending = SENDING_HDRSONLY; |
978e455f | 2273 | else |
2274 | sending = SENDING_BODY; | |
2275 | /* | |
2276 | * Figure out how much data we are supposed to send. | |
2277 | * If we are sending a body and we don't have a content-length, | |
2278 | * then we must wait for the object to become STORE_OK or | |
2279 | * STORE_ABORTED. | |
2280 | */ | |
2281 | if (sending == SENDING_HDRSONLY) | |
2282 | sendlen = reply->hdr_sz; | |
038eb4ed | 2283 | else if (reply->content_length < 0) |
978e455f | 2284 | return 0; |
2285 | else | |
038eb4ed | 2286 | sendlen = reply->content_length + reply->hdr_sz; |
978e455f | 2287 | /* |
2288 | * Now that we have the expected length, did we send it all? | |
2289 | */ | |
2290 | if (http->out.offset < sendlen) | |
2291 | return 0; | |
2292 | else | |
b34ed725 | 2293 | return 1; |
7a2f978b | 2294 | } |
2295 | ||
7a2f978b | 2296 | /* |
2297 | * This function is designed to serve a fairly specific purpose. | |
2298 | * Occasionally our vBNS-connected caches can talk to each other, but not | |
2299 | * the rest of the world. Here we try to detect frequent failures which | |
2300 | * make the cache unusable (e.g. DNS lookup and connect() failures). If | |
2301 | * the failure:success ratio goes above 1.0 then we go into "hit only" | |
2302 | * mode where we only return UDP_HIT or UDP_MISS_NOFETCH. Neighbors | |
2303 | * will only fetch HITs from us if they are using the ICP protocol. We | |
2304 | * stay in this mode for 5 minutes. | |
2305 | * | |
2306 | * Duane W., Sept 16, 1996 | |
2307 | */ | |
2308 | ||
2309 | static void | |
88aad2e5 | 2310 | checkFailureRatio(err_type etype, hier_code hcode) |
7a2f978b | 2311 | { |
88aad2e5 | 2312 | static double magic_factor = 100.0; |
7a2f978b | 2313 | double n_good; |
2314 | double n_bad; | |
2315 | if (hcode == HIER_NONE) | |
2316 | return; | |
88aad2e5 | 2317 | n_good = magic_factor / (1.0 + request_failure_ratio); |
7a2f978b | 2318 | n_bad = magic_factor - n_good; |
88aad2e5 | 2319 | switch (etype) { |
7a2f978b | 2320 | case ERR_DNS_FAIL: |
2321 | case ERR_CONNECT_FAIL: | |
2322 | case ERR_READ_ERROR: | |
2323 | n_bad++; | |
2324 | break; | |
2325 | default: | |
2326 | n_good++; | |
2327 | } | |
88aad2e5 | 2328 | request_failure_ratio = n_bad / n_good; |
7a2f978b | 2329 | if (hit_only_mode_until > squid_curtime) |
2330 | return; | |
88aad2e5 | 2331 | if (request_failure_ratio < 1.0) |
7a2f978b | 2332 | return; |
93f9abd0 | 2333 | debug(33, 0) ("Failure Ratio at %4.2f\n", request_failure_ratio); |
2334 | debug(33, 0) ("Going into hit-only-mode for %d minutes...\n", | |
7a2f978b | 2335 | FAILURE_MODE_TIME / 60); |
2336 | hit_only_mode_until = squid_curtime + FAILURE_MODE_TIME; | |
88aad2e5 | 2337 | request_failure_ratio = 0.8; /* reset to something less than 1.0 */ |
7a2f978b | 2338 | } |
15df8349 | 2339 | |
2340 | void | |
2341 | clientHttpConnectionsOpen(void) | |
2342 | { | |
2343 | ushortlist *u; | |
2344 | int fd; | |
15df8349 | 2345 | for (u = Config.Port.http; u; u = u->next) { |
8daca701 | 2346 | enter_suid(); |
2347 | fd = comm_open(SOCK_STREAM, | |
2348 | 0, | |
2349 | Config.Addrs.tcp_incoming, | |
2350 | u->i, | |
2351 | COMM_NONBLOCKING, | |
2352 | "HTTP Socket"); | |
2353 | leave_suid(); | |
2354 | if (fd < 0) | |
2355 | continue; | |
2356 | comm_listen(fd); | |
2357 | commSetSelect(fd, COMM_SELECT_READ, httpAccept, NULL, 0); | |
2358 | commSetDefer(fd, httpAcceptDefer, NULL); | |
2359 | debug(1, 1) ("Accepting HTTP connections on port %d, FD %d.\n", | |
2360 | (int) u->i, fd); | |
2361 | HttpSockets[NHttpSockets++] = fd; | |
15df8349 | 2362 | } |
2363 | if (NHttpSockets < 1) | |
8daca701 | 2364 | fatal("Cannot open HTTP Port"); |
15df8349 | 2365 | } |
c0fbae16 | 2366 | |
ab013258 | 2367 | int |
2368 | handleConnectionHeader(int flag, char *where, char *what) | |
2369 | { | |
2370 | char *t, *p, *wh; | |
2371 | int i; | |
2372 | LOCAL_ARRAY(char, mbuf, 256); | |
2373 | ||
2374 | if (flag) { /* lookup mode */ | |
2375 | if (where[0] == '\0' || what[0] == '\0') | |
2376 | return 0; | |
2377 | p = xstrdup(what); | |
2378 | t = strtok(p, ":"); | |
2379 | if (t == NULL) | |
2380 | return 0; | |
2381 | debug(20, 3) ("handleConnectionHeader: %s\n AND %s (%p)\n", where, t, p); | |
2382 | i = strstr(where, t) ? 1 : 0; | |
2383 | xfree(p); | |
2384 | return (i); | |
2385 | } | |
2386 | where[0] = '\0'; | |
2387 | wh = xstrdup(what); | |
2388 | t = strtok(wh, ","); | |
2389 | while (t != NULL) { | |
2390 | ||
2391 | #ifdef BE_PARANOID | |
2392 | static char no_conn[] = "Expires:Host:Content-length:Content-type:"; | |
2393 | ||
2394 | if (handleConnectionHeader(1, no_conn, t)) { | |
2395 | debug(1, 1) ("handleConnectionHeader: problematic header %s\n", t); | |
2396 | t = strtok(NULL, ",\n"); | |
2397 | continue; | |
2398 | } | |
2399 | #endif | |
2400 | if ((p = strchr(t, ':'))) | |
2401 | xstrncpy(mbuf, t, p - t + 1); | |
2402 | else | |
2403 | snprintf(mbuf, 256, "%s:", t); | |
2404 | strcat(where, mbuf); | |
2405 | t = strtok(NULL, ",\n"); | |
2406 | } | |
2407 | debug(20, 3) ("handleConnectionHeader: we have %s\n", where); | |
2408 | xfree(wh); | |
2409 | return 1; | |
2410 | } | |
2411 | ||
c0fbae16 | 2412 | void |
2413 | clientHttpConnectionsClose(void) | |
2414 | { | |
2415 | int i; | |
2416 | for (i = 0; i < NHttpSockets; i++) { | |
2417 | if (HttpSockets[i] >= 0) { | |
2418 | debug(1, 1) ("FD %d Closing HTTP connection\n", HttpSockets[i]); | |
2419 | comm_close(HttpSockets[i]); | |
2420 | HttpSockets[i] = -1; | |
2421 | } | |
2422 | } | |
2423 | NHttpSockets = 0; | |
2424 | } |