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edce4d98 | 1 | |
2 | /* | |
8369182c | 3 | * $Id: client_side_request.cc,v 1.36 2004/04/07 08:51:31 hno Exp $ |
69660be0 | 4 | * |
ae45c4de | 5 | * DEBUG: section 85 Client-side Request Routines |
6 | * AUTHOR: Robert Collins (Originally Duane Wessels in client_side.c) | |
69660be0 | 7 | * |
edce4d98 | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
9 | * ---------------------------------------------------------- | |
69660be0 | 10 | * |
11 | * Squid is the result of efforts by numerous individuals from the Internet | |
12 | * community; see the CONTRIBUTORS file for full details. Many organizations | |
13 | * have provided support for Squid's development; see the SPONSORS file for | |
14 | * full details. Squid is Copyrighted (C) 2001 by the Regents of the | |
15 | * University of California; see the COPYRIGHT file for full details. Squid | |
16 | * incorporates software developed and/or copyrighted by other sources; see the | |
17 | * CREDITS file for full details. | |
18 | * | |
19 | * This program is free software; you can redistribute it and/or modify it under | |
20 | * the terms of the GNU General Public License as published by the Free | |
21 | * Software Foundation; either version 2 of the License, or (at your option) | |
22 | * any later version. | |
23 | * | |
24 | * This program is distributed in the hope that it will be useful, but WITHOUT ANY | |
25 | * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
26 | * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more | |
27 | * details. | |
28 | * | |
29 | * You should have received a copy of the GNU General Public License along with | |
30 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
31 | * Place, Suite 330, Boston, MA 02111, USA. | |
32 | * | |
edce4d98 | 33 | */ |
34 | ||
35 | ||
69660be0 | 36 | /* |
37 | * General logic of request processing: | |
38 | * | |
39 | * We run a series of tests to determine if access will be permitted, and to do | |
40 | * any redirection. Then we call into the result clientStream to retrieve data. | |
41 | * From that point on it's up to reply management. | |
edce4d98 | 42 | */ |
43 | ||
44 | #include "squid.h" | |
c8be6d7b | 45 | #include "clientStream.h" |
46 | #include "client_side_request.h" | |
e6ccf245 | 47 | #include "authenticate.h" |
528b2c61 | 48 | #include "HttpRequest.h" |
8000a965 | 49 | #include "ACLChecklist.h" |
50 | #include "ACL.h" | |
a46d2c0e | 51 | #include "client_side.h" |
0655fa4d | 52 | #include "client_side_reply.h" |
53 | #include "Store.h" | |
54 | #include "HttpReply.h" | |
86a2f789 | 55 | #include "MemObject.h" |
edce4d98 | 56 | |
57 | #if LINGERING_CLOSE | |
58 | #define comm_close comm_lingering_close | |
59 | #endif | |
60 | ||
61 | static const char *const crlf = "\r\n"; | |
62 | ||
0655fa4d | 63 | class ClientRequestContext : public RefCountable |
62e76326 | 64 | { |
65 | ||
66 | public: | |
8e2745f4 | 67 | void *operator new(size_t); |
68 | void operator delete(void *); | |
8e2745f4 | 69 | |
70 | ClientRequestContext(); | |
71 | ClientRequestContext(ClientHttpRequest *); | |
72 | ~ClientRequestContext(); | |
62e76326 | 73 | |
8e2745f4 | 74 | void checkNoCache(); |
75 | ||
4fb35c3c | 76 | ACLChecklist *acl_checklist; /* need ptr back so we can unreg if needed */ |
edce4d98 | 77 | int redirect_state; |
78 | clientHttpRequest *http; | |
62e76326 | 79 | |
80 | private: | |
8e2745f4 | 81 | CBDATA_CLASS(ClientRequestContext); |
82 | static void CheckNoCacheDone(int answer, void *data); | |
83 | void checkNoCacheDone(int answer); | |
84 | }; | |
edce4d98 | 85 | |
8e2745f4 | 86 | CBDATA_CLASS_INIT(ClientRequestContext); |
87 | ||
88 | void * | |
89 | ClientRequestContext::operator new (size_t size) | |
90 | { | |
91 | assert (size == sizeof(ClientRequestContext)); | |
92 | CBDATA_INIT_TYPE(ClientRequestContext); | |
93 | ClientRequestContext *result = cbdataAlloc(ClientRequestContext); | |
94 | /* Mark result as being owned - we want the refcounter to do the delete | |
95 | * call */ | |
96 | cbdataReference(result); | |
97 | return result; | |
98 | } | |
62e76326 | 99 | |
8e2745f4 | 100 | void |
101 | ClientRequestContext::operator delete (void *address) | |
102 | { | |
103 | ClientRequestContext *t = static_cast<ClientRequestContext *>(address); | |
104 | cbdataFree(address); | |
105 | /* And allow the memory to be freed */ | |
106 | cbdataReferenceDone (t); | |
107 | } | |
108 | ||
edce4d98 | 109 | /* Local functions */ |
edce4d98 | 110 | /* other */ |
edce4d98 | 111 | static void clientAccessCheckDone(int, void *); |
edce4d98 | 112 | static int clientCachable(clientHttpRequest * http); |
113 | static int clientHierarchical(clientHttpRequest * http); | |
114 | static void clientInterpretRequestHeaders(clientHttpRequest * http); | |
115 | static RH clientRedirectDone; | |
e6ccf245 | 116 | extern "C" CSR clientGetMoreData; |
117 | extern "C" CSS clientReplyStatus; | |
118 | extern "C" CSD clientReplyDetach; | |
528b2c61 | 119 | static void checkFailureRatio(err_type, hier_code); |
edce4d98 | 120 | |
8e2745f4 | 121 | ClientRequestContext::~ClientRequestContext() |
122 | { | |
123 | if (http) | |
62e76326 | 124 | cbdataReferenceDone(http); |
125 | ||
8e2745f4 | 126 | if (acl_checklist) |
00d77d6b | 127 | delete acl_checklist; |
8e2745f4 | 128 | } |
129 | ||
130 | ClientRequestContext::ClientRequestContext() : acl_checklist (NULL), redirect_state (REDIRECT_NONE), http(NULL) | |
62e76326 | 131 | {} |
edce4d98 | 132 | |
8e2745f4 | 133 | ClientRequestContext::ClientRequestContext(ClientHttpRequest *newHttp) : acl_checklist (NULL), redirect_state (REDIRECT_NONE), http(cbdataReference(newHttp)) |
edce4d98 | 134 | { |
8e2745f4 | 135 | assert (newHttp != NULL); |
edce4d98 | 136 | } |
137 | ||
528b2c61 | 138 | CBDATA_CLASS_INIT(ClientHttpRequest); |
8e2745f4 | 139 | |
528b2c61 | 140 | void * |
141 | ClientHttpRequest::operator new (size_t size) | |
142 | { | |
143 | assert (size == sizeof (ClientHttpRequest)); | |
144 | CBDATA_INIT_TYPE(ClientHttpRequest); | |
145 | ClientHttpRequest *result = cbdataAlloc(ClientHttpRequest); | |
146 | /* Mark result as being owned - we want the refcounter to do the delete | |
147 | * call */ | |
148 | cbdataReference(result); | |
149 | return result; | |
150 | } | |
151 | ||
62e76326 | 152 | void |
528b2c61 | 153 | ClientHttpRequest::operator delete (void *address) |
154 | { | |
155 | ClientHttpRequest *temp = static_cast<ClientHttpRequest *>(address); | |
156 | cbdataFree(address); | |
157 | /* And allow the memory to be freed */ | |
158 | cbdataReferenceDone (temp); | |
159 | } | |
160 | ||
0976f8db | 161 | ClientHttpRequest::ClientHttpRequest() : loggingEntry_(NULL) |
528b2c61 | 162 | { |
163 | /* reset range iterator */ | |
164 | start = current_time; | |
165 | } | |
166 | ||
0655fa4d | 167 | /* |
168 | * returns true if client specified that the object must come from the cache | |
169 | * without contacting origin server | |
170 | */ | |
171 | bool | |
172 | ClientHttpRequest::onlyIfCached()const | |
173 | { | |
174 | assert(request); | |
175 | return request->cache_control && | |
176 | EBIT_TEST(request->cache_control->mask, CC_ONLY_IF_CACHED); | |
177 | } | |
178 | ||
528b2c61 | 179 | /* |
180 | * This function is designed to serve a fairly specific purpose. | |
181 | * Occasionally our vBNS-connected caches can talk to each other, but not | |
182 | * the rest of the world. Here we try to detect frequent failures which | |
183 | * make the cache unusable (e.g. DNS lookup and connect() failures). If | |
184 | * the failure:success ratio goes above 1.0 then we go into "hit only" | |
185 | * mode where we only return UDP_HIT or UDP_MISS_NOFETCH. Neighbors | |
186 | * will only fetch HITs from us if they are using the ICP protocol. We | |
187 | * stay in this mode for 5 minutes. | |
188 | * | |
189 | * Duane W., Sept 16, 1996 | |
190 | */ | |
191 | ||
192 | #define FAILURE_MODE_TIME 300 | |
193 | ||
194 | static void | |
195 | checkFailureRatio(err_type etype, hier_code hcode) | |
196 | { | |
197 | static double magic_factor = 100.0; | |
198 | double n_good; | |
199 | double n_bad; | |
62e76326 | 200 | |
528b2c61 | 201 | if (hcode == HIER_NONE) |
62e76326 | 202 | return; |
203 | ||
528b2c61 | 204 | n_good = magic_factor / (1.0 + request_failure_ratio); |
62e76326 | 205 | |
528b2c61 | 206 | n_bad = magic_factor - n_good; |
62e76326 | 207 | |
528b2c61 | 208 | switch (etype) { |
62e76326 | 209 | |
528b2c61 | 210 | case ERR_DNS_FAIL: |
62e76326 | 211 | |
528b2c61 | 212 | case ERR_CONNECT_FAIL: |
62e76326 | 213 | |
528b2c61 | 214 | case ERR_READ_ERROR: |
62e76326 | 215 | n_bad++; |
216 | break; | |
217 | ||
528b2c61 | 218 | default: |
62e76326 | 219 | n_good++; |
528b2c61 | 220 | } |
62e76326 | 221 | |
528b2c61 | 222 | request_failure_ratio = n_bad / n_good; |
62e76326 | 223 | |
528b2c61 | 224 | if (hit_only_mode_until > squid_curtime) |
62e76326 | 225 | return; |
226 | ||
528b2c61 | 227 | if (request_failure_ratio < 1.0) |
62e76326 | 228 | return; |
229 | ||
528b2c61 | 230 | debug(33, 0) ("Failure Ratio at %4.2f\n", request_failure_ratio); |
62e76326 | 231 | |
528b2c61 | 232 | debug(33, 0) ("Going into hit-only-mode for %d minutes...\n", |
62e76326 | 233 | FAILURE_MODE_TIME / 60); |
234 | ||
528b2c61 | 235 | hit_only_mode_until = squid_curtime + FAILURE_MODE_TIME; |
62e76326 | 236 | |
528b2c61 | 237 | request_failure_ratio = 0.8; /* reset to something less than 1.0 */ |
238 | } | |
239 | ||
240 | ClientHttpRequest::~ClientHttpRequest() | |
241 | { | |
242 | debug(33, 3) ("httpRequestFree: %s\n", uri); | |
243 | /* if body_connection !NULL, then ProcessBody has not | |
244 | * found the end of the body yet | |
245 | */ | |
62e76326 | 246 | |
a2ac85d9 | 247 | if (request && request->body_connection.getRaw() != NULL) |
62e76326 | 248 | clientAbortBody(request); /* abort body transter */ |
249 | ||
528b2c61 | 250 | /* the ICP check here was erroneous |
251 | * - storeReleaseRequest was always called if entry was valid | |
252 | */ | |
253 | assert(logType < LOG_TYPE_MAX); | |
62e76326 | 254 | |
528b2c61 | 255 | logRequest(); |
62e76326 | 256 | |
0976f8db | 257 | loggingEntry(NULL); |
258 | ||
528b2c61 | 259 | if (request) |
62e76326 | 260 | checkFailureRatio(request->errType, al.hier.code); |
261 | ||
528b2c61 | 262 | freeResources(); |
62e76326 | 263 | |
528b2c61 | 264 | /* moving to the next connection is handled by the context free */ |
265 | dlinkDelete(&active, &ClientActiveRequests); | |
266 | } | |
62e76326 | 267 | |
edce4d98 | 268 | /* Create a request and kick it off */ |
69660be0 | 269 | /* |
270 | * TODO: Pass in the buffers to be used in the inital Read request, as they are | |
271 | * determined by the user | |
edce4d98 | 272 | */ |
273 | int /* returns nonzero on failure */ | |
274 | clientBeginRequest(method_t method, char const *url, CSCB * streamcallback, | |
0655fa4d | 275 | CSD * streamdetach, ClientStreamData streamdata, HttpHeader const *header, |
62e76326 | 276 | char *tailbuf, size_t taillen) |
edce4d98 | 277 | { |
278 | size_t url_sz; | |
450e0c10 | 279 | HttpVersion http_ver (1, 0); |
528b2c61 | 280 | clientHttpRequest *http = new ClientHttpRequest; |
190154cf | 281 | HttpRequest *request; |
528b2c61 | 282 | StoreIOBuffer tempBuffer; |
edce4d98 | 283 | http->http_ver = http_ver; |
98242069 | 284 | http->setConn(NULL); |
edce4d98 | 285 | http->start = current_time; |
286 | /* this is only used to adjust the connection offset in client_side.c */ | |
287 | http->req_sz = 0; | |
c8be6d7b | 288 | tempBuffer.length = taillen; |
289 | tempBuffer.data = tailbuf; | |
edce4d98 | 290 | /* client stream setup */ |
291 | clientStreamInit(&http->client_stream, clientGetMoreData, clientReplyDetach, | |
0655fa4d | 292 | clientReplyStatus, new clientReplyContext(http), streamcallback, |
62e76326 | 293 | streamdetach, streamdata, tempBuffer); |
edce4d98 | 294 | /* make it visible in the 'current acctive requests list' */ |
295 | dlinkAdd(http, &http->active, &ClientActiveRequests); | |
296 | /* Set flags */ | |
a46d2c0e | 297 | /* internal requests only makes sense in an |
298 | * accelerator today. TODO: accept flags ? */ | |
299 | http->flags.accel = 1; | |
edce4d98 | 300 | /* allow size for url rewriting */ |
301 | url_sz = strlen(url) + Config.appendDomainLen + 5; | |
e6ccf245 | 302 | http->uri = (char *)xcalloc(url_sz, 1); |
edce4d98 | 303 | strcpy(http->uri, url); |
304 | ||
305 | if ((request = urlParse(method, http->uri)) == NULL) { | |
62e76326 | 306 | debug(85, 5) ("Invalid URL: %s\n", http->uri); |
307 | return -1; | |
edce4d98 | 308 | } |
62e76326 | 309 | |
69660be0 | 310 | /* |
311 | * now update the headers in request with our supplied headers. urLParse | |
312 | * should return a blank header set, but we use Update to be sure of | |
313 | * correctness. | |
edce4d98 | 314 | */ |
315 | if (header) | |
62e76326 | 316 | httpHeaderUpdate(&request->header, header, NULL); |
317 | ||
edce4d98 | 318 | http->log_uri = xstrdup(urlCanonicalClean(request)); |
62e76326 | 319 | |
edce4d98 | 320 | /* http struct now ready */ |
321 | ||
69660be0 | 322 | /* |
323 | * build new header list *? TODO | |
edce4d98 | 324 | */ |
325 | request->flags.accelerated = http->flags.accel; | |
62e76326 | 326 | |
a46d2c0e | 327 | request->flags.internalclient = 1; |
328 | ||
329 | /* this is an internally created | |
330 | * request, not subject to acceleration | |
331 | * target overrides */ | |
69660be0 | 332 | /* |
333 | * FIXME? Do we want to detect and handle internal requests of internal | |
334 | * objects ? | |
335 | */ | |
edce4d98 | 336 | |
337 | /* Internally created requests cannot have bodies today */ | |
338 | request->content_length = 0; | |
62e76326 | 339 | |
edce4d98 | 340 | request->client_addr = no_addr; |
62e76326 | 341 | |
edce4d98 | 342 | request->my_addr = no_addr; /* undefined for internal requests */ |
62e76326 | 343 | |
edce4d98 | 344 | request->my_port = 0; |
62e76326 | 345 | |
edce4d98 | 346 | request->http_ver = http_ver; |
62e76326 | 347 | |
edce4d98 | 348 | http->request = requestLink(request); |
349 | ||
350 | /* optional - skip the access check ? */ | |
351 | clientAccessCheck(http); | |
62e76326 | 352 | |
edce4d98 | 353 | return 0; |
354 | } | |
355 | ||
edce4d98 | 356 | /* This is the entry point for external users of the client_side routines */ |
357 | void | |
8e2745f4 | 358 | clientAccessCheck(ClientHttpRequest *http) |
edce4d98 | 359 | { |
8e2745f4 | 360 | ClientRequestContext *context = new ClientRequestContext(http); |
edce4d98 | 361 | context->acl_checklist = |
62e76326 | 362 | clientAclChecklistCreate(Config.accessList.http, http); |
225b7b10 | 363 | context->acl_checklist->nonBlockingCheck(clientAccessCheckDone, context); |
edce4d98 | 364 | } |
365 | ||
366 | void | |
367 | clientAccessCheckDone(int answer, void *data) | |
368 | { | |
8e2745f4 | 369 | ClientRequestContext *context = (ClientRequestContext *)data; |
62e76326 | 370 | |
7d31d5fa | 371 | context->acl_checklist = NULL; |
fbade053 | 372 | clientHttpRequest *http_ = context->http; |
373 | ||
374 | if (!cbdataReferenceValid (http_)) { | |
00d77d6b | 375 | delete context; |
62e76326 | 376 | return; |
fbade053 | 377 | } |
62e76326 | 378 | |
edce4d98 | 379 | clientHttpRequest *http = context->http; |
380 | err_type page_id; | |
381 | http_status status; | |
e6ccf245 | 382 | char const *proxy_auth_msg = NULL; |
edce4d98 | 383 | debug(85, 2) ("The request %s %s is %s, because it matched '%s'\n", |
62e76326 | 384 | RequestMethodStr[http->request->method], http->uri, |
385 | answer == ACCESS_ALLOWED ? "ALLOWED" : "DENIED", | |
386 | AclMatchedName ? AclMatchedName : "NO ACL's"); | |
a2ac85d9 | 387 | proxy_auth_msg = authenticateAuthUserRequestMessage((http->getConn().getRaw() != NULL |
98242069 | 388 | && http->getConn()->auth_user_request) ? http->getConn()-> |
62e76326 | 389 | auth_user_request : http->request->auth_user_request); |
62e76326 | 390 | |
edce4d98 | 391 | if (answer == ACCESS_ALLOWED) { |
62e76326 | 392 | safe_free(http->uri); |
393 | http->uri = xstrdup(urlCanonical(http->request)); | |
394 | assert(context->redirect_state == REDIRECT_NONE); | |
395 | context->redirect_state = REDIRECT_PENDING; | |
8369182c | 396 | redirectStart(http, clientRedirectDone, context); |
edce4d98 | 397 | } else { |
62e76326 | 398 | /* Send an error */ |
399 | clientStreamNode *node = (clientStreamNode *)http->client_stream.tail->prev->data; | |
00d77d6b | 400 | delete context; |
62e76326 | 401 | debug(85, 5) ("Access Denied: %s\n", http->uri); |
402 | debug(85, 5) ("AclMatchedName = %s\n", | |
403 | AclMatchedName ? AclMatchedName : "<null>"); | |
404 | debug(85, 5) ("Proxy Auth Message = %s\n", | |
405 | proxy_auth_msg ? proxy_auth_msg : "<null>"); | |
406 | /* | |
407 | * NOTE: get page_id here, based on AclMatchedName because if | |
408 | * USE_DELAY_POOLS is enabled, then AclMatchedName gets clobbered in | |
409 | * the clientCreateStoreEntry() call just below. Pedro Ribeiro | |
410 | * <pribeiro@isel.pt> | |
411 | */ | |
412 | page_id = aclGetDenyInfoPage(&Config.denyInfoList, AclMatchedName); | |
413 | http->logType = LOG_TCP_DENIED; | |
414 | ||
415 | if (answer == ACCESS_REQ_PROXY_AUTH || aclIsProxyAuth(AclMatchedName)) { | |
416 | if (!http->flags.accel) { | |
417 | /* Proxy authorisation needed */ | |
418 | status = HTTP_PROXY_AUTHENTICATION_REQUIRED; | |
419 | } else { | |
420 | /* WWW authorisation needed */ | |
421 | status = HTTP_UNAUTHORIZED; | |
422 | } | |
423 | ||
424 | if (page_id == ERR_NONE) | |
425 | page_id = ERR_CACHE_ACCESS_DENIED; | |
426 | } else { | |
427 | status = HTTP_FORBIDDEN; | |
428 | ||
429 | if (page_id == ERR_NONE) | |
430 | page_id = ERR_ACCESS_DENIED; | |
431 | } | |
432 | ||
0655fa4d | 433 | clientReplyContext *repContext = dynamic_cast<clientReplyContext *>(node->data.getRaw()); |
434 | assert (repContext); | |
435 | repContext->setReplyToError(page_id, status, | |
436 | http->request->method, NULL, | |
a2ac85d9 | 437 | http->getConn().getRaw() != NULL ? &http->getConn()->peer.sin_addr : &no_addr, http->request, |
438 | NULL, http->getConn().getRaw() != NULL | |
98242069 | 439 | && http->getConn()->auth_user_request ? http->getConn()-> |
0655fa4d | 440 | auth_user_request : http->request->auth_user_request); |
62e76326 | 441 | node = (clientStreamNode *)http->client_stream.tail->data; |
442 | clientStreamRead(node, http, node->readBuffer); | |
edce4d98 | 443 | } |
444 | } | |
445 | ||
446 | static int | |
447 | clientCachable(clientHttpRequest * http) | |
448 | { | |
190154cf | 449 | HttpRequest *req = http->request; |
edce4d98 | 450 | method_t method = req->method; |
62e76326 | 451 | |
edce4d98 | 452 | if (req->protocol == PROTO_HTTP) |
62e76326 | 453 | return httpCachable(method); |
454 | ||
edce4d98 | 455 | /* FTP is always cachable */ |
456 | if (req->protocol == PROTO_WAIS) | |
62e76326 | 457 | return 0; |
458 | ||
69660be0 | 459 | /* |
460 | * The below looks questionable: what non HTTP protocols use connect, | |
461 | * trace, put and post? RC | |
edce4d98 | 462 | */ |
463 | if (method == METHOD_CONNECT) | |
62e76326 | 464 | return 0; |
465 | ||
edce4d98 | 466 | if (method == METHOD_TRACE) |
62e76326 | 467 | return 0; |
468 | ||
edce4d98 | 469 | if (method == METHOD_PUT) |
62e76326 | 470 | return 0; |
471 | ||
edce4d98 | 472 | if (method == METHOD_POST) |
a46d2c0e | 473 | return 0; |
474 | ||
475 | /* XXX POST may be cached sometimes.. ignored | |
476 | ||
477 | * for now */ | |
edce4d98 | 478 | if (req->protocol == PROTO_GOPHER) |
62e76326 | 479 | return gopherCachable(req); |
480 | ||
edce4d98 | 481 | if (req->protocol == PROTO_CACHEOBJ) |
62e76326 | 482 | return 0; |
483 | ||
edce4d98 | 484 | return 1; |
485 | } | |
486 | ||
487 | static int | |
488 | clientHierarchical(clientHttpRequest * http) | |
489 | { | |
490 | const char *url = http->uri; | |
190154cf | 491 | HttpRequest *request = http->request; |
edce4d98 | 492 | method_t method = request->method; |
493 | const wordlist *p = NULL; | |
494 | ||
69660be0 | 495 | /* |
496 | * IMS needs a private key, so we can use the hierarchy for IMS only if our | |
497 | * neighbors support private keys | |
498 | */ | |
62e76326 | 499 | |
edce4d98 | 500 | if (request->flags.ims && !neighbors_do_private_keys) |
62e76326 | 501 | return 0; |
502 | ||
69660be0 | 503 | /* |
504 | * This is incorrect: authenticating requests can be sent via a hierarchy | |
505 | * (they can even be cached if the correct headers are set on the reply | |
edce4d98 | 506 | */ |
507 | if (request->flags.auth) | |
62e76326 | 508 | return 0; |
509 | ||
edce4d98 | 510 | if (method == METHOD_TRACE) |
62e76326 | 511 | return 1; |
512 | ||
edce4d98 | 513 | if (method != METHOD_GET) |
62e76326 | 514 | return 0; |
515 | ||
edce4d98 | 516 | /* scan hierarchy_stoplist */ |
517 | for (p = Config.hierarchy_stoplist; p; p = p->next) | |
62e76326 | 518 | if (strstr(url, p->key)) |
519 | return 0; | |
520 | ||
edce4d98 | 521 | if (request->flags.loopdetect) |
62e76326 | 522 | return 0; |
523 | ||
edce4d98 | 524 | if (request->protocol == PROTO_HTTP) |
62e76326 | 525 | return httpCachable(method); |
526 | ||
edce4d98 | 527 | if (request->protocol == PROTO_GOPHER) |
62e76326 | 528 | return gopherCachable(request); |
529 | ||
edce4d98 | 530 | if (request->protocol == PROTO_WAIS) |
62e76326 | 531 | return 0; |
532 | ||
edce4d98 | 533 | if (request->protocol == PROTO_CACHEOBJ) |
62e76326 | 534 | return 0; |
535 | ||
edce4d98 | 536 | return 1; |
537 | } | |
538 | ||
539 | ||
540 | static void | |
541 | clientInterpretRequestHeaders(clientHttpRequest * http) | |
542 | { | |
190154cf | 543 | HttpRequest *request = http->request; |
edce4d98 | 544 | const HttpHeader *req_hdr = &request->header; |
545 | int no_cache = 0; | |
a787b56a | 546 | #if !(ESI) || defined(USE_USERAGENT_LOG) || defined(USE_REFERER_LOG) |
62e76326 | 547 | |
edce4d98 | 548 | const char *str; |
549 | #endif | |
62e76326 | 550 | |
edce4d98 | 551 | request->imslen = -1; |
552 | request->ims = httpHeaderGetTime(req_hdr, HDR_IF_MODIFIED_SINCE); | |
62e76326 | 553 | |
edce4d98 | 554 | if (request->ims > 0) |
62e76326 | 555 | request->flags.ims = 1; |
556 | ||
edce4d98 | 557 | #if ESI |
69660be0 | 558 | /* |
559 | * We ignore Cache-Control as per the Edge Architecture Section 3. See | |
560 | * www.esi.org for more information. | |
edce4d98 | 561 | */ |
562 | #else | |
62e76326 | 563 | |
edce4d98 | 564 | if (httpHeaderHas(req_hdr, HDR_PRAGMA)) { |
62e76326 | 565 | String s = httpHeaderGetList(req_hdr, HDR_PRAGMA); |
566 | ||
567 | if (strListIsMember(&s, "no-cache", ',')) | |
568 | no_cache++; | |
569 | ||
570 | s.clean(); | |
edce4d98 | 571 | } |
62e76326 | 572 | |
edce4d98 | 573 | request->cache_control = httpHeaderGetCc(req_hdr); |
62e76326 | 574 | |
edce4d98 | 575 | if (request->cache_control) |
62e76326 | 576 | if (EBIT_TEST(request->cache_control->mask, CC_NO_CACHE)) |
577 | no_cache++; | |
578 | ||
69660be0 | 579 | /* |
62e76326 | 580 | * Work around for supporting the Reload button in IE browsers when Squid |
581 | * is used as an accelerator or transparent proxy, by turning accelerated | |
582 | * IMS request to no-cache requests. Now knows about IE 5.5 fix (is | |
583 | * actually only fixed in SP1, but we can't tell whether we are talking to | |
584 | * SP1 or not so all 5.5 versions are treated 'normally'). | |
585 | */ | |
edce4d98 | 586 | if (Config.onoff.ie_refresh) { |
62e76326 | 587 | if (http->flags.accel && request->flags.ims) { |
588 | if ((str = httpHeaderGetStr(req_hdr, HDR_USER_AGENT))) { | |
589 | if (strstr(str, "MSIE 5.01") != NULL) | |
590 | no_cache++; | |
591 | else if (strstr(str, "MSIE 5.0") != NULL) | |
592 | no_cache++; | |
593 | else if (strstr(str, "MSIE 4.") != NULL) | |
594 | no_cache++; | |
595 | else if (strstr(str, "MSIE 3.") != NULL) | |
596 | no_cache++; | |
597 | } | |
598 | } | |
edce4d98 | 599 | } |
62e76326 | 600 | |
edce4d98 | 601 | #endif |
602 | if (no_cache) { | |
603 | #if HTTP_VIOLATIONS | |
62e76326 | 604 | |
605 | if (Config.onoff.reload_into_ims) | |
606 | request->flags.nocache_hack = 1; | |
607 | else if (refresh_nocache_hack) | |
608 | request->flags.nocache_hack = 1; | |
609 | else | |
edce4d98 | 610 | #endif |
62e76326 | 611 | |
612 | request->flags.nocache = 1; | |
edce4d98 | 613 | } |
62e76326 | 614 | |
edce4d98 | 615 | /* ignore range header in non-GETs */ |
616 | if (request->method == METHOD_GET) { | |
62e76326 | 617 | request->range = httpHeaderGetRange(req_hdr); |
618 | ||
619 | if (request->range) { | |
620 | request->flags.range = 1; | |
621 | clientStreamNode *node = (clientStreamNode *)http->client_stream.tail->data; | |
622 | /* XXX: This is suboptimal. We should give the stream the range set, | |
623 | * and thereby let the top of the stream set the offset when the | |
624 | * size becomes known. As it is, we will end up requesting from 0 | |
625 | * for evey -X range specification. | |
626 | * RBC - this may be somewhat wrong. We should probably set the range | |
627 | * iter up at this point. | |
628 | */ | |
629 | node->readBuffer.offset = request->range->lowestOffset(0); | |
630 | http->range_iter.pos = request->range->begin(); | |
631 | http->range_iter.valid = true; | |
632 | } | |
edce4d98 | 633 | } |
62e76326 | 634 | |
edce4d98 | 635 | if (httpHeaderHas(req_hdr, HDR_AUTHORIZATION)) |
62e76326 | 636 | request->flags.auth = 1; |
637 | ||
edce4d98 | 638 | if (request->login[0] != '\0') |
62e76326 | 639 | request->flags.auth = 1; |
640 | ||
edce4d98 | 641 | if (httpHeaderHas(req_hdr, HDR_VIA)) { |
62e76326 | 642 | String s = httpHeaderGetList(req_hdr, HDR_VIA); |
643 | /* | |
644 | * ThisCache cannot be a member of Via header, "1.0 ThisCache" can. | |
645 | * Note ThisCache2 has a space prepended to the hostname so we don't | |
646 | * accidentally match super-domains. | |
647 | */ | |
648 | ||
649 | if (strListIsSubstr(&s, ThisCache2, ',')) { | |
650 | debugObj(33, 1, "WARNING: Forwarding loop detected for:\n", | |
651 | request, (ObjPackMethod) & httpRequestPack); | |
652 | request->flags.loopdetect = 1; | |
653 | } | |
654 | ||
edce4d98 | 655 | #if FORW_VIA_DB |
62e76326 | 656 | fvdbCountVia(s.buf()); |
657 | ||
edce4d98 | 658 | #endif |
62e76326 | 659 | |
660 | s.clean(); | |
edce4d98 | 661 | } |
62e76326 | 662 | |
edce4d98 | 663 | #if USE_USERAGENT_LOG |
664 | if ((str = httpHeaderGetStr(req_hdr, HDR_USER_AGENT))) | |
7928e475 | 665 | logUserAgent(fqdnFromAddr(http->getConn().getRaw() ? http->getConn()->log_addr : no_addr), str); |
62e76326 | 666 | |
edce4d98 | 667 | #endif |
668 | #if USE_REFERER_LOG | |
62e76326 | 669 | |
edce4d98 | 670 | if ((str = httpHeaderGetStr(req_hdr, HDR_REFERER))) |
7928e475 | 671 | logReferer(fqdnFromAddr(http->getConn().getRaw() ? http->getConn()->log_addr : no_addr), str, http->log_uri); |
62e76326 | 672 | |
edce4d98 | 673 | #endif |
674 | #if FORW_VIA_DB | |
62e76326 | 675 | |
edce4d98 | 676 | if (httpHeaderHas(req_hdr, HDR_X_FORWARDED_FOR)) { |
62e76326 | 677 | String s = httpHeaderGetList(req_hdr, HDR_X_FORWARDED_FOR); |
678 | fvdbCountForw(s.buf()); | |
679 | s.clean(); | |
edce4d98 | 680 | } |
62e76326 | 681 | |
edce4d98 | 682 | #endif |
683 | if (request->method == METHOD_TRACE) { | |
62e76326 | 684 | request->max_forwards = httpHeaderGetInt(req_hdr, HDR_MAX_FORWARDS); |
edce4d98 | 685 | } |
62e76326 | 686 | |
edce4d98 | 687 | if (clientCachable(http)) |
62e76326 | 688 | request->flags.cachable = 1; |
689 | ||
edce4d98 | 690 | if (clientHierarchical(http)) |
62e76326 | 691 | request->flags.hierarchical = 1; |
692 | ||
edce4d98 | 693 | debug(85, 5) ("clientInterpretRequestHeaders: REQ_NOCACHE = %s\n", |
62e76326 | 694 | request->flags.nocache ? "SET" : "NOT SET"); |
695 | ||
edce4d98 | 696 | debug(85, 5) ("clientInterpretRequestHeaders: REQ_CACHABLE = %s\n", |
62e76326 | 697 | request->flags.cachable ? "SET" : "NOT SET"); |
698 | ||
edce4d98 | 699 | debug(85, 5) ("clientInterpretRequestHeaders: REQ_HIERARCHICAL = %s\n", |
62e76326 | 700 | request->flags.hierarchical ? "SET" : "NOT SET"); |
edce4d98 | 701 | } |
702 | ||
703 | void | |
704 | clientRedirectDone(void *data, char *result) | |
705 | { | |
8e2745f4 | 706 | ClientRequestContext *context = (ClientRequestContext *)data; |
db02222f | 707 | clientHttpRequest *http_ = context->http; |
708 | ||
709 | if (!cbdataReferenceValid (http_)) { | |
00d77d6b | 710 | delete context; |
62e76326 | 711 | return; |
db02222f | 712 | } |
62e76326 | 713 | |
edce4d98 | 714 | clientHttpRequest *http = context->http; |
190154cf | 715 | HttpRequest *new_request = NULL; |
716 | HttpRequest *old_request = http->request; | |
edce4d98 | 717 | debug(85, 5) ("clientRedirectDone: '%s' result=%s\n", http->uri, |
62e76326 | 718 | result ? result : "NULL"); |
edce4d98 | 719 | assert(context->redirect_state == REDIRECT_PENDING); |
720 | context->redirect_state = REDIRECT_DONE; | |
62e76326 | 721 | |
edce4d98 | 722 | if (result) { |
62e76326 | 723 | http_status status = (http_status) atoi(result); |
724 | ||
725 | if (status == HTTP_MOVED_PERMANENTLY | |
726 | || status == HTTP_MOVED_TEMPORARILY | |
727 | || status == HTTP_SEE_OTHER | |
728 | || status == HTTP_TEMPORARY_REDIRECT) { | |
729 | char *t = result; | |
730 | ||
731 | if ((t = strchr(result, ':')) != NULL) { | |
732 | http->redirect.status = status; | |
733 | http->redirect.location = xstrdup(t + 1); | |
734 | } else { | |
735 | debug(85, 1) ("clientRedirectDone: bad input: %s\n", result); | |
736 | } | |
737 | } | |
738 | ||
739 | if (strcmp(result, http->uri)) | |
740 | new_request = urlParse(old_request->method, result); | |
edce4d98 | 741 | } |
62e76326 | 742 | |
edce4d98 | 743 | if (new_request) { |
62e76326 | 744 | safe_free(http->uri); |
745 | http->uri = xstrdup(urlCanonical(new_request)); | |
746 | new_request->http_ver = old_request->http_ver; | |
747 | httpHeaderAppend(&new_request->header, &old_request->header); | |
748 | new_request->client_addr = old_request->client_addr; | |
47b0c1fa | 749 | new_request->client_port = old_request->client_port; |
62e76326 | 750 | new_request->my_addr = old_request->my_addr; |
751 | new_request->my_port = old_request->my_port; | |
752 | new_request->flags = old_request->flags; | |
753 | ||
754 | if (old_request->auth_user_request) { | |
755 | new_request->auth_user_request = old_request->auth_user_request; | |
756 | authenticateAuthUserRequestLock(new_request->auth_user_request); | |
757 | } | |
758 | ||
a2ac85d9 | 759 | if (old_request->body_connection.getRaw() != NULL) { |
62e76326 | 760 | new_request->body_connection = old_request->body_connection; |
761 | old_request->body_connection = NULL; | |
762 | } | |
763 | ||
764 | new_request->content_length = old_request->content_length; | |
abb929f0 | 765 | new_request->extacl_user = old_request->extacl_user; |
766 | new_request->extacl_passwd = old_request->extacl_passwd; | |
62e76326 | 767 | new_request->flags.proxy_keepalive = old_request->flags.proxy_keepalive; |
768 | requestUnlink(old_request); | |
769 | http->request = requestLink(new_request); | |
edce4d98 | 770 | } |
62e76326 | 771 | |
edce4d98 | 772 | clientInterpretRequestHeaders(http); |
773 | #if HEADERS_LOG | |
62e76326 | 774 | |
edce4d98 | 775 | headersLog(0, 1, request->method, request); |
776 | #endif | |
777 | /* FIXME PIPELINE: This is innacurate during pipelining */ | |
62e76326 | 778 | |
a2ac85d9 | 779 | if (http->getConn().getRaw() != NULL) |
98242069 | 780 | fd_note(http->getConn()->fd, http->uri); |
62e76326 | 781 | |
c8be6d7b | 782 | assert(http->uri); |
62e76326 | 783 | |
8e2745f4 | 784 | context->checkNoCache(); |
edce4d98 | 785 | } |
786 | ||
787 | void | |
8e2745f4 | 788 | ClientRequestContext::checkNoCache() |
edce4d98 | 789 | { |
edce4d98 | 790 | if (Config.accessList.noCache && http->request->flags.cachable) { |
62e76326 | 791 | acl_checklist = |
792 | clientAclChecklistCreate(Config.accessList.noCache, http); | |
793 | acl_checklist->nonBlockingCheck(CheckNoCacheDone, cbdataReference(this)); | |
edce4d98 | 794 | } else { |
62e76326 | 795 | CheckNoCacheDone(http->request->flags.cachable, cbdataReference(this)); |
edce4d98 | 796 | } |
797 | } | |
798 | ||
799 | void | |
8e2745f4 | 800 | ClientRequestContext::CheckNoCacheDone(int answer, void *data) |
edce4d98 | 801 | { |
4fb35c3c | 802 | void *temp; |
e4a67a80 | 803 | #ifndef PURIFY |
804 | ||
805 | bool valid = | |
806 | #endif | |
807 | cbdataReferenceValidDone(data, &temp); | |
8e2745f4 | 808 | /* acl NB calls cannot invalidate cbdata in the normal course of things */ |
4fb35c3c | 809 | assert (valid); |
8e2745f4 | 810 | ClientRequestContext *context = (ClientRequestContext *)temp; |
811 | context->checkNoCacheDone(answer); | |
812 | } | |
4fb35c3c | 813 | |
8e2745f4 | 814 | void |
815 | ClientRequestContext::checkNoCacheDone(int answer) | |
62e76326 | 816 | { |
8e2745f4 | 817 | acl_checklist = NULL; |
818 | clientHttpRequest *http_ = http; | |
8e2745f4 | 819 | |
3b1b4c07 | 820 | if (!cbdataReferenceValid (http_)) { |
00d77d6b | 821 | delete this; |
62e76326 | 822 | return; |
3b1b4c07 | 823 | } |
62e76326 | 824 | |
00d77d6b | 825 | delete this; |
8e2745f4 | 826 | http_->request->flags.cachable = answer; |
827 | http_->processRequest(); | |
edce4d98 | 828 | } |
829 | ||
69660be0 | 830 | /* |
831 | * Identify requests that do not go through the store and client side stream | |
832 | * and forward them to the appropriate location. All other requests, request | |
833 | * them. | |
edce4d98 | 834 | */ |
835 | void | |
8e2745f4 | 836 | ClientHttpRequest::processRequest() |
edce4d98 | 837 | { |
edce4d98 | 838 | debug(85, 4) ("clientProcessRequest: %s '%s'\n", |
62e76326 | 839 | RequestMethodStr[request->method], uri); |
840 | ||
8e2745f4 | 841 | if (request->method == METHOD_CONNECT) { |
62e76326 | 842 | logType = LOG_TCP_MISS; |
843 | sslStart(this, &out.size, &al.http.code); | |
844 | return; | |
edce4d98 | 845 | } |
62e76326 | 846 | |
8e2745f4 | 847 | httpStart(); |
848 | } | |
849 | ||
850 | void | |
851 | ClientHttpRequest::httpStart() | |
852 | { | |
853 | logType = LOG_TAG_NONE; | |
854 | debug(85, 4) ("ClientHttpRequest::httpStart: %s for '%s'\n", | |
62e76326 | 855 | log_tags[logType], uri); |
edce4d98 | 856 | /* no one should have touched this */ |
8e2745f4 | 857 | assert(out.offset == 0); |
edce4d98 | 858 | /* Use the Stream Luke */ |
8e2745f4 | 859 | clientStreamNode *node = (clientStreamNode *)client_stream.tail->data; |
860 | clientStreamRead(node, this, node->readBuffer); | |
edce4d98 | 861 | } |
0655fa4d | 862 | |
863 | bool | |
864 | ClientHttpRequest::gotEnough() const | |
865 | { | |
86a2f789 | 866 | /** TODO: should be querying the stream. */ |
0655fa4d | 867 | int contentLength = |
86a2f789 | 868 | httpReplyBodySize(request->method, memObject()->getReply()); |
0655fa4d | 869 | assert(contentLength >= 0); |
870 | ||
871 | if (out.offset < contentLength) | |
872 | return false; | |
873 | ||
874 | return true; | |
875 | } | |
876 | ||
b51aec66 | 877 | void |
878 | ClientHttpRequest::maxReplyBodySize(ssize_t clen) | |
879 | { | |
880 | maxReplyBodySize_ = clen; | |
881 | } | |
882 | ||
883 | ssize_t | |
884 | ClientHttpRequest::maxReplyBodySize() const | |
885 | { | |
886 | return maxReplyBodySize_; | |
887 | } | |
888 | ||
889 | bool | |
890 | ClientHttpRequest::isReplyBodyTooLarge(ssize_t clen) const | |
891 | { | |
892 | if (0 == maxReplyBodySize()) | |
893 | return 0; /* disabled */ | |
894 | ||
895 | if (clen < 0) | |
896 | return 0; /* unknown */ | |
897 | ||
898 | return clen > maxReplyBodySize(); | |
899 | } | |
86a2f789 | 900 | |
901 | void | |
902 | ClientHttpRequest::storeEntry(StoreEntry *newEntry) | |
903 | { | |
904 | entry_ = newEntry; | |
905 | } | |
906 | ||
0976f8db | 907 | void |
908 | ClientHttpRequest::loggingEntry(StoreEntry *newEntry) | |
909 | { | |
910 | if (loggingEntry_) | |
911 | storeUnlockObject(loggingEntry_); | |
912 | ||
913 | loggingEntry_ = newEntry; | |
914 | ||
915 | if (loggingEntry_) | |
916 | storeLockObject(loggingEntry_); | |
917 | } | |
86a2f789 | 918 | |
919 | #ifndef _USE_INLINE_ | |
920 | #include "client_side_request.cci" | |
921 | #endif |