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edce4d98 | 1 | |
2 | /* | |
b9ae18aa | 3 | * $Id: client_side_request.cc,v 1.42 2004/12/20 16:30:35 robertc 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" | |
f5691f9c | 47 | #include "AuthUserRequest.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 */ | |
7e6b941f | 96 | return cbdataReference(result); |
8e2745f4 | 97 | } |
62e76326 | 98 | |
8e2745f4 | 99 | void |
100 | ClientRequestContext::operator delete (void *address) | |
101 | { | |
102 | ClientRequestContext *t = static_cast<ClientRequestContext *>(address); | |
103 | cbdataFree(address); | |
104 | /* And allow the memory to be freed */ | |
105 | cbdataReferenceDone (t); | |
106 | } | |
107 | ||
edce4d98 | 108 | /* Local functions */ |
edce4d98 | 109 | /* other */ |
edce4d98 | 110 | static void clientAccessCheckDone(int, void *); |
edce4d98 | 111 | static int clientCachable(clientHttpRequest * http); |
112 | static int clientHierarchical(clientHttpRequest * http); | |
113 | static void clientInterpretRequestHeaders(clientHttpRequest * http); | |
14cc8559 | 114 | static void clientRedirectStart(ClientRequestContext *context); |
edce4d98 | 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 */ | |
7e6b941f | 148 | return cbdataReference(result); |
528b2c61 | 149 | } |
150 | ||
62e76326 | 151 | void |
528b2c61 | 152 | ClientHttpRequest::operator delete (void *address) |
153 | { | |
154 | ClientHttpRequest *temp = static_cast<ClientHttpRequest *>(address); | |
155 | cbdataFree(address); | |
156 | /* And allow the memory to be freed */ | |
157 | cbdataReferenceDone (temp); | |
158 | } | |
159 | ||
0976f8db | 160 | ClientHttpRequest::ClientHttpRequest() : loggingEntry_(NULL) |
528b2c61 | 161 | { |
162 | /* reset range iterator */ | |
163 | start = current_time; | |
164 | } | |
165 | ||
0655fa4d | 166 | /* |
167 | * returns true if client specified that the object must come from the cache | |
168 | * without contacting origin server | |
169 | */ | |
170 | bool | |
171 | ClientHttpRequest::onlyIfCached()const | |
172 | { | |
173 | assert(request); | |
174 | return request->cache_control && | |
175 | EBIT_TEST(request->cache_control->mask, CC_ONLY_IF_CACHED); | |
176 | } | |
177 | ||
528b2c61 | 178 | /* |
179 | * This function is designed to serve a fairly specific purpose. | |
180 | * Occasionally our vBNS-connected caches can talk to each other, but not | |
181 | * the rest of the world. Here we try to detect frequent failures which | |
182 | * make the cache unusable (e.g. DNS lookup and connect() failures). If | |
183 | * the failure:success ratio goes above 1.0 then we go into "hit only" | |
184 | * mode where we only return UDP_HIT or UDP_MISS_NOFETCH. Neighbors | |
185 | * will only fetch HITs from us if they are using the ICP protocol. We | |
186 | * stay in this mode for 5 minutes. | |
187 | * | |
188 | * Duane W., Sept 16, 1996 | |
189 | */ | |
190 | ||
191 | #define FAILURE_MODE_TIME 300 | |
192 | ||
193 | static void | |
194 | checkFailureRatio(err_type etype, hier_code hcode) | |
195 | { | |
196 | static double magic_factor = 100.0; | |
197 | double n_good; | |
198 | double n_bad; | |
62e76326 | 199 | |
528b2c61 | 200 | if (hcode == HIER_NONE) |
62e76326 | 201 | return; |
202 | ||
528b2c61 | 203 | n_good = magic_factor / (1.0 + request_failure_ratio); |
62e76326 | 204 | |
528b2c61 | 205 | n_bad = magic_factor - n_good; |
62e76326 | 206 | |
528b2c61 | 207 | switch (etype) { |
62e76326 | 208 | |
528b2c61 | 209 | case ERR_DNS_FAIL: |
62e76326 | 210 | |
528b2c61 | 211 | case ERR_CONNECT_FAIL: |
62e76326 | 212 | |
528b2c61 | 213 | case ERR_READ_ERROR: |
62e76326 | 214 | n_bad++; |
215 | break; | |
216 | ||
528b2c61 | 217 | default: |
62e76326 | 218 | n_good++; |
528b2c61 | 219 | } |
62e76326 | 220 | |
528b2c61 | 221 | request_failure_ratio = n_bad / n_good; |
62e76326 | 222 | |
528b2c61 | 223 | if (hit_only_mode_until > squid_curtime) |
62e76326 | 224 | return; |
225 | ||
528b2c61 | 226 | if (request_failure_ratio < 1.0) |
62e76326 | 227 | return; |
228 | ||
528b2c61 | 229 | debug(33, 0) ("Failure Ratio at %4.2f\n", request_failure_ratio); |
62e76326 | 230 | |
528b2c61 | 231 | debug(33, 0) ("Going into hit-only-mode for %d minutes...\n", |
62e76326 | 232 | FAILURE_MODE_TIME / 60); |
233 | ||
528b2c61 | 234 | hit_only_mode_until = squid_curtime + FAILURE_MODE_TIME; |
62e76326 | 235 | |
528b2c61 | 236 | request_failure_ratio = 0.8; /* reset to something less than 1.0 */ |
237 | } | |
238 | ||
239 | ClientHttpRequest::~ClientHttpRequest() | |
240 | { | |
241 | debug(33, 3) ("httpRequestFree: %s\n", uri); | |
242 | /* if body_connection !NULL, then ProcessBody has not | |
243 | * found the end of the body yet | |
244 | */ | |
62e76326 | 245 | |
a2ac85d9 | 246 | if (request && request->body_connection.getRaw() != NULL) |
62e76326 | 247 | clientAbortBody(request); /* abort body transter */ |
248 | ||
528b2c61 | 249 | /* the ICP check here was erroneous |
250 | * - storeReleaseRequest was always called if entry was valid | |
251 | */ | |
252 | assert(logType < LOG_TYPE_MAX); | |
62e76326 | 253 | |
528b2c61 | 254 | logRequest(); |
62e76326 | 255 | |
0976f8db | 256 | loggingEntry(NULL); |
257 | ||
528b2c61 | 258 | if (request) |
62e76326 | 259 | checkFailureRatio(request->errType, al.hier.code); |
260 | ||
528b2c61 | 261 | freeResources(); |
62e76326 | 262 | |
528b2c61 | 263 | /* moving to the next connection is handled by the context free */ |
264 | dlinkDelete(&active, &ClientActiveRequests); | |
265 | } | |
62e76326 | 266 | |
edce4d98 | 267 | /* Create a request and kick it off */ |
69660be0 | 268 | /* |
269 | * TODO: Pass in the buffers to be used in the inital Read request, as they are | |
270 | * determined by the user | |
edce4d98 | 271 | */ |
272 | int /* returns nonzero on failure */ | |
273 | clientBeginRequest(method_t method, char const *url, CSCB * streamcallback, | |
0655fa4d | 274 | CSD * streamdetach, ClientStreamData streamdata, HttpHeader const *header, |
62e76326 | 275 | char *tailbuf, size_t taillen) |
edce4d98 | 276 | { |
277 | size_t url_sz; | |
450e0c10 | 278 | HttpVersion http_ver (1, 0); |
528b2c61 | 279 | clientHttpRequest *http = new ClientHttpRequest; |
190154cf | 280 | HttpRequest *request; |
528b2c61 | 281 | StoreIOBuffer tempBuffer; |
edce4d98 | 282 | http->http_ver = http_ver; |
98242069 | 283 | http->setConn(NULL); |
edce4d98 | 284 | http->start = current_time; |
285 | /* this is only used to adjust the connection offset in client_side.c */ | |
286 | http->req_sz = 0; | |
c8be6d7b | 287 | tempBuffer.length = taillen; |
288 | tempBuffer.data = tailbuf; | |
edce4d98 | 289 | /* client stream setup */ |
290 | clientStreamInit(&http->client_stream, clientGetMoreData, clientReplyDetach, | |
0655fa4d | 291 | clientReplyStatus, new clientReplyContext(http), streamcallback, |
62e76326 | 292 | streamdetach, streamdata, tempBuffer); |
edce4d98 | 293 | /* make it visible in the 'current acctive requests list' */ |
294 | dlinkAdd(http, &http->active, &ClientActiveRequests); | |
295 | /* Set flags */ | |
a46d2c0e | 296 | /* internal requests only makes sense in an |
297 | * accelerator today. TODO: accept flags ? */ | |
298 | http->flags.accel = 1; | |
edce4d98 | 299 | /* allow size for url rewriting */ |
300 | url_sz = strlen(url) + Config.appendDomainLen + 5; | |
e6ccf245 | 301 | http->uri = (char *)xcalloc(url_sz, 1); |
edce4d98 | 302 | strcpy(http->uri, url); |
303 | ||
304 | if ((request = urlParse(method, http->uri)) == NULL) { | |
62e76326 | 305 | debug(85, 5) ("Invalid URL: %s\n", http->uri); |
306 | return -1; | |
edce4d98 | 307 | } |
62e76326 | 308 | |
69660be0 | 309 | /* |
310 | * now update the headers in request with our supplied headers. urLParse | |
311 | * should return a blank header set, but we use Update to be sure of | |
312 | * correctness. | |
edce4d98 | 313 | */ |
314 | if (header) | |
62e76326 | 315 | httpHeaderUpdate(&request->header, header, NULL); |
316 | ||
edce4d98 | 317 | http->log_uri = xstrdup(urlCanonicalClean(request)); |
62e76326 | 318 | |
edce4d98 | 319 | /* http struct now ready */ |
320 | ||
69660be0 | 321 | /* |
322 | * build new header list *? TODO | |
edce4d98 | 323 | */ |
324 | request->flags.accelerated = http->flags.accel; | |
62e76326 | 325 | |
a46d2c0e | 326 | request->flags.internalclient = 1; |
327 | ||
328 | /* this is an internally created | |
329 | * request, not subject to acceleration | |
330 | * target overrides */ | |
69660be0 | 331 | /* |
332 | * FIXME? Do we want to detect and handle internal requests of internal | |
333 | * objects ? | |
334 | */ | |
edce4d98 | 335 | |
336 | /* Internally created requests cannot have bodies today */ | |
337 | request->content_length = 0; | |
62e76326 | 338 | |
edce4d98 | 339 | request->client_addr = no_addr; |
62e76326 | 340 | |
edce4d98 | 341 | request->my_addr = no_addr; /* undefined for internal requests */ |
62e76326 | 342 | |
edce4d98 | 343 | request->my_port = 0; |
62e76326 | 344 | |
edce4d98 | 345 | request->http_ver = http_ver; |
62e76326 | 346 | |
edce4d98 | 347 | http->request = requestLink(request); |
348 | ||
349 | /* optional - skip the access check ? */ | |
350 | clientAccessCheck(http); | |
62e76326 | 351 | |
edce4d98 | 352 | return 0; |
353 | } | |
354 | ||
edce4d98 | 355 | /* This is the entry point for external users of the client_side routines */ |
356 | void | |
8e2745f4 | 357 | clientAccessCheck(ClientHttpRequest *http) |
edce4d98 | 358 | { |
8e2745f4 | 359 | ClientRequestContext *context = new ClientRequestContext(http); |
edce4d98 | 360 | context->acl_checklist = |
62e76326 | 361 | clientAclChecklistCreate(Config.accessList.http, http); |
225b7b10 | 362 | context->acl_checklist->nonBlockingCheck(clientAccessCheckDone, context); |
edce4d98 | 363 | } |
364 | ||
365 | void | |
366 | clientAccessCheckDone(int answer, void *data) | |
367 | { | |
8e2745f4 | 368 | ClientRequestContext *context = (ClientRequestContext *)data; |
62e76326 | 369 | |
7d31d5fa | 370 | context->acl_checklist = NULL; |
fbade053 | 371 | clientHttpRequest *http_ = context->http; |
372 | ||
373 | if (!cbdataReferenceValid (http_)) { | |
00d77d6b | 374 | delete context; |
62e76326 | 375 | return; |
fbade053 | 376 | } |
62e76326 | 377 | |
edce4d98 | 378 | clientHttpRequest *http = context->http; |
379 | err_type page_id; | |
380 | http_status status; | |
edce4d98 | 381 | debug(85, 2) ("The request %s %s is %s, because it matched '%s'\n", |
62e76326 | 382 | RequestMethodStr[http->request->method], http->uri, |
383 | answer == ACCESS_ALLOWED ? "ALLOWED" : "DENIED", | |
384 | AclMatchedName ? AclMatchedName : "NO ACL's"); | |
f5691f9c | 385 | char const *proxy_auth_msg = "<null>"; |
386 | ||
387 | if (http->getConn().getRaw() != NULL && http->getConn()->auth_user_request != NULL) | |
388 | proxy_auth_msg = http->getConn()->auth_user_request->denyMessage("<null>"); | |
389 | else if (http->request->auth_user_request != NULL) | |
390 | proxy_auth_msg = http->request->auth_user_request->denyMessage("<null>"); | |
62e76326 | 391 | |
edce4d98 | 392 | if (answer == ACCESS_ALLOWED) { |
62e76326 | 393 | safe_free(http->uri); |
394 | http->uri = xstrdup(urlCanonical(http->request)); | |
395 | assert(context->redirect_state == REDIRECT_NONE); | |
396 | context->redirect_state = REDIRECT_PENDING; | |
14cc8559 | 397 | clientRedirectStart(context); |
edce4d98 | 398 | } else { |
62e76326 | 399 | /* Send an error */ |
400 | clientStreamNode *node = (clientStreamNode *)http->client_stream.tail->prev->data; | |
00d77d6b | 401 | delete context; |
62e76326 | 402 | debug(85, 5) ("Access Denied: %s\n", http->uri); |
403 | debug(85, 5) ("AclMatchedName = %s\n", | |
404 | AclMatchedName ? AclMatchedName : "<null>"); | |
405 | debug(85, 5) ("Proxy Auth Message = %s\n", | |
406 | proxy_auth_msg ? proxy_auth_msg : "<null>"); | |
407 | /* | |
408 | * NOTE: get page_id here, based on AclMatchedName because if | |
409 | * USE_DELAY_POOLS is enabled, then AclMatchedName gets clobbered in | |
410 | * the clientCreateStoreEntry() call just below. Pedro Ribeiro | |
411 | * <pribeiro@isel.pt> | |
412 | */ | |
413 | page_id = aclGetDenyInfoPage(&Config.denyInfoList, AclMatchedName); | |
414 | http->logType = LOG_TCP_DENIED; | |
415 | ||
416 | if (answer == ACCESS_REQ_PROXY_AUTH || aclIsProxyAuth(AclMatchedName)) { | |
417 | if (!http->flags.accel) { | |
418 | /* Proxy authorisation needed */ | |
419 | status = HTTP_PROXY_AUTHENTICATION_REQUIRED; | |
420 | } else { | |
421 | /* WWW authorisation needed */ | |
422 | status = HTTP_UNAUTHORIZED; | |
423 | } | |
424 | ||
425 | if (page_id == ERR_NONE) | |
426 | page_id = ERR_CACHE_ACCESS_DENIED; | |
427 | } else { | |
428 | status = HTTP_FORBIDDEN; | |
429 | ||
430 | if (page_id == ERR_NONE) | |
431 | page_id = ERR_ACCESS_DENIED; | |
432 | } | |
433 | ||
0655fa4d | 434 | clientReplyContext *repContext = dynamic_cast<clientReplyContext *>(node->data.getRaw()); |
435 | assert (repContext); | |
436 | repContext->setReplyToError(page_id, status, | |
437 | http->request->method, NULL, | |
a2ac85d9 | 438 | http->getConn().getRaw() != NULL ? &http->getConn()->peer.sin_addr : &no_addr, http->request, |
439 | NULL, http->getConn().getRaw() != NULL | |
98242069 | 440 | && http->getConn()->auth_user_request ? http->getConn()-> |
0655fa4d | 441 | auth_user_request : http->request->auth_user_request); |
62e76326 | 442 | node = (clientStreamNode *)http->client_stream.tail->data; |
443 | clientStreamRead(node, http, node->readBuffer); | |
edce4d98 | 444 | } |
445 | } | |
446 | ||
14cc8559 | 447 | static void |
448 | clientRedirectAccessCheckDone(int answer, void *data) | |
449 | { | |
450 | ClientRequestContext *context = (ClientRequestContext *)data; | |
451 | clientHttpRequest *http = context->http; | |
452 | context->acl_checklist = NULL; | |
453 | ||
454 | if (answer == ACCESS_ALLOWED) | |
455 | redirectStart(http, clientRedirectDone, context); | |
456 | else | |
457 | clientRedirectDone(context, NULL); | |
458 | } | |
459 | ||
460 | static void | |
461 | clientRedirectStart(ClientRequestContext *context) | |
462 | { | |
463 | clientHttpRequest *http = context->http; | |
464 | debug(33, 5) ("clientRedirectStart: '%s'\n", http->uri); | |
465 | ||
466 | if (Config.Program.redirect == NULL) { | |
467 | clientRedirectDone(context, NULL); | |
468 | return; | |
469 | } | |
470 | ||
471 | if (Config.accessList.redirector) { | |
472 | context->acl_checklist = clientAclChecklistCreate(Config.accessList.redirector, http); | |
473 | context->acl_checklist->nonBlockingCheck(clientRedirectAccessCheckDone, context); | |
474 | } else | |
475 | redirectStart(http, clientRedirectDone, context); | |
476 | } | |
477 | ||
edce4d98 | 478 | static int |
479 | clientCachable(clientHttpRequest * http) | |
480 | { | |
190154cf | 481 | HttpRequest *req = http->request; |
edce4d98 | 482 | method_t method = req->method; |
62e76326 | 483 | |
edce4d98 | 484 | if (req->protocol == PROTO_HTTP) |
62e76326 | 485 | return httpCachable(method); |
486 | ||
edce4d98 | 487 | /* FTP is always cachable */ |
488 | if (req->protocol == PROTO_WAIS) | |
62e76326 | 489 | return 0; |
490 | ||
69660be0 | 491 | /* |
492 | * The below looks questionable: what non HTTP protocols use connect, | |
493 | * trace, put and post? RC | |
edce4d98 | 494 | */ |
495 | if (method == METHOD_CONNECT) | |
62e76326 | 496 | return 0; |
497 | ||
edce4d98 | 498 | if (method == METHOD_TRACE) |
62e76326 | 499 | return 0; |
500 | ||
edce4d98 | 501 | if (method == METHOD_PUT) |
62e76326 | 502 | return 0; |
503 | ||
edce4d98 | 504 | if (method == METHOD_POST) |
a46d2c0e | 505 | return 0; |
506 | ||
507 | /* XXX POST may be cached sometimes.. ignored | |
508 | ||
509 | * for now */ | |
edce4d98 | 510 | if (req->protocol == PROTO_GOPHER) |
62e76326 | 511 | return gopherCachable(req); |
512 | ||
edce4d98 | 513 | if (req->protocol == PROTO_CACHEOBJ) |
62e76326 | 514 | return 0; |
515 | ||
edce4d98 | 516 | return 1; |
517 | } | |
518 | ||
519 | static int | |
520 | clientHierarchical(clientHttpRequest * http) | |
521 | { | |
522 | const char *url = http->uri; | |
190154cf | 523 | HttpRequest *request = http->request; |
edce4d98 | 524 | method_t method = request->method; |
525 | const wordlist *p = NULL; | |
526 | ||
69660be0 | 527 | /* |
528 | * IMS needs a private key, so we can use the hierarchy for IMS only if our | |
529 | * neighbors support private keys | |
530 | */ | |
62e76326 | 531 | |
edce4d98 | 532 | if (request->flags.ims && !neighbors_do_private_keys) |
62e76326 | 533 | return 0; |
534 | ||
69660be0 | 535 | /* |
536 | * This is incorrect: authenticating requests can be sent via a hierarchy | |
537 | * (they can even be cached if the correct headers are set on the reply | |
edce4d98 | 538 | */ |
539 | if (request->flags.auth) | |
62e76326 | 540 | return 0; |
541 | ||
edce4d98 | 542 | if (method == METHOD_TRACE) |
62e76326 | 543 | return 1; |
544 | ||
edce4d98 | 545 | if (method != METHOD_GET) |
62e76326 | 546 | return 0; |
547 | ||
edce4d98 | 548 | /* scan hierarchy_stoplist */ |
549 | for (p = Config.hierarchy_stoplist; p; p = p->next) | |
62e76326 | 550 | if (strstr(url, p->key)) |
551 | return 0; | |
552 | ||
edce4d98 | 553 | if (request->flags.loopdetect) |
62e76326 | 554 | return 0; |
555 | ||
edce4d98 | 556 | if (request->protocol == PROTO_HTTP) |
62e76326 | 557 | return httpCachable(method); |
558 | ||
edce4d98 | 559 | if (request->protocol == PROTO_GOPHER) |
62e76326 | 560 | return gopherCachable(request); |
561 | ||
edce4d98 | 562 | if (request->protocol == PROTO_WAIS) |
62e76326 | 563 | return 0; |
564 | ||
edce4d98 | 565 | if (request->protocol == PROTO_CACHEOBJ) |
62e76326 | 566 | return 0; |
567 | ||
edce4d98 | 568 | return 1; |
569 | } | |
570 | ||
571 | ||
572 | static void | |
573 | clientInterpretRequestHeaders(clientHttpRequest * http) | |
574 | { | |
190154cf | 575 | HttpRequest *request = http->request; |
edce4d98 | 576 | const HttpHeader *req_hdr = &request->header; |
577 | int no_cache = 0; | |
a787b56a | 578 | #if !(ESI) || defined(USE_USERAGENT_LOG) || defined(USE_REFERER_LOG) |
62e76326 | 579 | |
edce4d98 | 580 | const char *str; |
581 | #endif | |
62e76326 | 582 | |
edce4d98 | 583 | request->imslen = -1; |
584 | request->ims = httpHeaderGetTime(req_hdr, HDR_IF_MODIFIED_SINCE); | |
62e76326 | 585 | |
edce4d98 | 586 | if (request->ims > 0) |
62e76326 | 587 | request->flags.ims = 1; |
588 | ||
edce4d98 | 589 | #if ESI |
69660be0 | 590 | /* |
591 | * We ignore Cache-Control as per the Edge Architecture Section 3. See | |
592 | * www.esi.org for more information. | |
edce4d98 | 593 | */ |
594 | #else | |
62e76326 | 595 | |
edce4d98 | 596 | if (httpHeaderHas(req_hdr, HDR_PRAGMA)) { |
62e76326 | 597 | String s = httpHeaderGetList(req_hdr, HDR_PRAGMA); |
598 | ||
599 | if (strListIsMember(&s, "no-cache", ',')) | |
600 | no_cache++; | |
601 | ||
602 | s.clean(); | |
edce4d98 | 603 | } |
62e76326 | 604 | |
edce4d98 | 605 | request->cache_control = httpHeaderGetCc(req_hdr); |
62e76326 | 606 | |
edce4d98 | 607 | if (request->cache_control) |
62e76326 | 608 | if (EBIT_TEST(request->cache_control->mask, CC_NO_CACHE)) |
609 | no_cache++; | |
610 | ||
69660be0 | 611 | /* |
62e76326 | 612 | * Work around for supporting the Reload button in IE browsers when Squid |
613 | * is used as an accelerator or transparent proxy, by turning accelerated | |
614 | * IMS request to no-cache requests. Now knows about IE 5.5 fix (is | |
615 | * actually only fixed in SP1, but we can't tell whether we are talking to | |
616 | * SP1 or not so all 5.5 versions are treated 'normally'). | |
617 | */ | |
edce4d98 | 618 | if (Config.onoff.ie_refresh) { |
62e76326 | 619 | if (http->flags.accel && request->flags.ims) { |
620 | if ((str = httpHeaderGetStr(req_hdr, HDR_USER_AGENT))) { | |
621 | if (strstr(str, "MSIE 5.01") != NULL) | |
622 | no_cache++; | |
623 | else if (strstr(str, "MSIE 5.0") != NULL) | |
624 | no_cache++; | |
625 | else if (strstr(str, "MSIE 4.") != NULL) | |
626 | no_cache++; | |
627 | else if (strstr(str, "MSIE 3.") != NULL) | |
628 | no_cache++; | |
629 | } | |
630 | } | |
edce4d98 | 631 | } |
62e76326 | 632 | |
edce4d98 | 633 | #endif |
634 | if (no_cache) { | |
635 | #if HTTP_VIOLATIONS | |
62e76326 | 636 | |
637 | if (Config.onoff.reload_into_ims) | |
638 | request->flags.nocache_hack = 1; | |
639 | else if (refresh_nocache_hack) | |
640 | request->flags.nocache_hack = 1; | |
641 | else | |
edce4d98 | 642 | #endif |
62e76326 | 643 | |
644 | request->flags.nocache = 1; | |
edce4d98 | 645 | } |
62e76326 | 646 | |
edce4d98 | 647 | /* ignore range header in non-GETs */ |
648 | if (request->method == METHOD_GET) { | |
62e76326 | 649 | request->range = httpHeaderGetRange(req_hdr); |
650 | ||
651 | if (request->range) { | |
652 | request->flags.range = 1; | |
653 | clientStreamNode *node = (clientStreamNode *)http->client_stream.tail->data; | |
654 | /* XXX: This is suboptimal. We should give the stream the range set, | |
655 | * and thereby let the top of the stream set the offset when the | |
656 | * size becomes known. As it is, we will end up requesting from 0 | |
657 | * for evey -X range specification. | |
658 | * RBC - this may be somewhat wrong. We should probably set the range | |
659 | * iter up at this point. | |
660 | */ | |
661 | node->readBuffer.offset = request->range->lowestOffset(0); | |
662 | http->range_iter.pos = request->range->begin(); | |
663 | http->range_iter.valid = true; | |
664 | } | |
edce4d98 | 665 | } |
62e76326 | 666 | |
edce4d98 | 667 | if (httpHeaderHas(req_hdr, HDR_AUTHORIZATION)) |
62e76326 | 668 | request->flags.auth = 1; |
669 | ||
edce4d98 | 670 | if (request->login[0] != '\0') |
62e76326 | 671 | request->flags.auth = 1; |
672 | ||
edce4d98 | 673 | if (httpHeaderHas(req_hdr, HDR_VIA)) { |
62e76326 | 674 | String s = httpHeaderGetList(req_hdr, HDR_VIA); |
675 | /* | |
676 | * ThisCache cannot be a member of Via header, "1.0 ThisCache" can. | |
677 | * Note ThisCache2 has a space prepended to the hostname so we don't | |
678 | * accidentally match super-domains. | |
679 | */ | |
680 | ||
681 | if (strListIsSubstr(&s, ThisCache2, ',')) { | |
682 | debugObj(33, 1, "WARNING: Forwarding loop detected for:\n", | |
683 | request, (ObjPackMethod) & httpRequestPack); | |
684 | request->flags.loopdetect = 1; | |
685 | } | |
686 | ||
edce4d98 | 687 | #if FORW_VIA_DB |
62e76326 | 688 | fvdbCountVia(s.buf()); |
689 | ||
edce4d98 | 690 | #endif |
62e76326 | 691 | |
692 | s.clean(); | |
edce4d98 | 693 | } |
62e76326 | 694 | |
edce4d98 | 695 | #if USE_USERAGENT_LOG |
696 | if ((str = httpHeaderGetStr(req_hdr, HDR_USER_AGENT))) | |
7928e475 | 697 | logUserAgent(fqdnFromAddr(http->getConn().getRaw() ? http->getConn()->log_addr : no_addr), str); |
62e76326 | 698 | |
edce4d98 | 699 | #endif |
700 | #if USE_REFERER_LOG | |
62e76326 | 701 | |
edce4d98 | 702 | if ((str = httpHeaderGetStr(req_hdr, HDR_REFERER))) |
7928e475 | 703 | logReferer(fqdnFromAddr(http->getConn().getRaw() ? http->getConn()->log_addr : no_addr), str, http->log_uri); |
62e76326 | 704 | |
edce4d98 | 705 | #endif |
706 | #if FORW_VIA_DB | |
62e76326 | 707 | |
edce4d98 | 708 | if (httpHeaderHas(req_hdr, HDR_X_FORWARDED_FOR)) { |
62e76326 | 709 | String s = httpHeaderGetList(req_hdr, HDR_X_FORWARDED_FOR); |
710 | fvdbCountForw(s.buf()); | |
711 | s.clean(); | |
edce4d98 | 712 | } |
62e76326 | 713 | |
edce4d98 | 714 | #endif |
715 | if (request->method == METHOD_TRACE) { | |
62e76326 | 716 | request->max_forwards = httpHeaderGetInt(req_hdr, HDR_MAX_FORWARDS); |
edce4d98 | 717 | } |
62e76326 | 718 | |
edce4d98 | 719 | if (clientCachable(http)) |
62e76326 | 720 | request->flags.cachable = 1; |
721 | ||
edce4d98 | 722 | if (clientHierarchical(http)) |
62e76326 | 723 | request->flags.hierarchical = 1; |
724 | ||
edce4d98 | 725 | debug(85, 5) ("clientInterpretRequestHeaders: REQ_NOCACHE = %s\n", |
62e76326 | 726 | request->flags.nocache ? "SET" : "NOT SET"); |
727 | ||
edce4d98 | 728 | debug(85, 5) ("clientInterpretRequestHeaders: REQ_CACHABLE = %s\n", |
62e76326 | 729 | request->flags.cachable ? "SET" : "NOT SET"); |
730 | ||
edce4d98 | 731 | debug(85, 5) ("clientInterpretRequestHeaders: REQ_HIERARCHICAL = %s\n", |
62e76326 | 732 | request->flags.hierarchical ? "SET" : "NOT SET"); |
edce4d98 | 733 | } |
734 | ||
735 | void | |
736 | clientRedirectDone(void *data, char *result) | |
737 | { | |
8e2745f4 | 738 | ClientRequestContext *context = (ClientRequestContext *)data; |
db02222f | 739 | clientHttpRequest *http_ = context->http; |
740 | ||
741 | if (!cbdataReferenceValid (http_)) { | |
00d77d6b | 742 | delete context; |
62e76326 | 743 | return; |
db02222f | 744 | } |
62e76326 | 745 | |
edce4d98 | 746 | clientHttpRequest *http = context->http; |
190154cf | 747 | HttpRequest *new_request = NULL; |
748 | HttpRequest *old_request = http->request; | |
edce4d98 | 749 | debug(85, 5) ("clientRedirectDone: '%s' result=%s\n", http->uri, |
62e76326 | 750 | result ? result : "NULL"); |
edce4d98 | 751 | assert(context->redirect_state == REDIRECT_PENDING); |
752 | context->redirect_state = REDIRECT_DONE; | |
62e76326 | 753 | |
edce4d98 | 754 | if (result) { |
62e76326 | 755 | http_status status = (http_status) atoi(result); |
756 | ||
757 | if (status == HTTP_MOVED_PERMANENTLY | |
758 | || status == HTTP_MOVED_TEMPORARILY | |
759 | || status == HTTP_SEE_OTHER | |
760 | || status == HTTP_TEMPORARY_REDIRECT) { | |
761 | char *t = result; | |
762 | ||
763 | if ((t = strchr(result, ':')) != NULL) { | |
764 | http->redirect.status = status; | |
765 | http->redirect.location = xstrdup(t + 1); | |
766 | } else { | |
767 | debug(85, 1) ("clientRedirectDone: bad input: %s\n", result); | |
768 | } | |
769 | } | |
770 | ||
771 | if (strcmp(result, http->uri)) | |
772 | new_request = urlParse(old_request->method, result); | |
edce4d98 | 773 | } |
62e76326 | 774 | |
edce4d98 | 775 | if (new_request) { |
62e76326 | 776 | safe_free(http->uri); |
777 | http->uri = xstrdup(urlCanonical(new_request)); | |
778 | new_request->http_ver = old_request->http_ver; | |
779 | httpHeaderAppend(&new_request->header, &old_request->header); | |
780 | new_request->client_addr = old_request->client_addr; | |
47b0c1fa | 781 | new_request->client_port = old_request->client_port; |
62e76326 | 782 | new_request->my_addr = old_request->my_addr; |
783 | new_request->my_port = old_request->my_port; | |
784 | new_request->flags = old_request->flags; | |
3c1f01bc | 785 | new_request->flags.redirected = 1; |
62e76326 | 786 | |
787 | if (old_request->auth_user_request) { | |
788 | new_request->auth_user_request = old_request->auth_user_request; | |
f5691f9c | 789 | |
790 | new_request->auth_user_request->lock() | |
791 | ||
792 | ; | |
62e76326 | 793 | } |
794 | ||
a2ac85d9 | 795 | if (old_request->body_connection.getRaw() != NULL) { |
62e76326 | 796 | new_request->body_connection = old_request->body_connection; |
797 | old_request->body_connection = NULL; | |
798 | } | |
799 | ||
800 | new_request->content_length = old_request->content_length; | |
abb929f0 | 801 | new_request->extacl_user = old_request->extacl_user; |
802 | new_request->extacl_passwd = old_request->extacl_passwd; | |
62e76326 | 803 | new_request->flags.proxy_keepalive = old_request->flags.proxy_keepalive; |
804 | requestUnlink(old_request); | |
805 | http->request = requestLink(new_request); | |
edce4d98 | 806 | } |
62e76326 | 807 | |
edce4d98 | 808 | clientInterpretRequestHeaders(http); |
809 | #if HEADERS_LOG | |
62e76326 | 810 | |
edce4d98 | 811 | headersLog(0, 1, request->method, request); |
812 | #endif | |
813 | /* FIXME PIPELINE: This is innacurate during pipelining */ | |
62e76326 | 814 | |
a2ac85d9 | 815 | if (http->getConn().getRaw() != NULL) |
98242069 | 816 | fd_note(http->getConn()->fd, http->uri); |
62e76326 | 817 | |
c8be6d7b | 818 | assert(http->uri); |
62e76326 | 819 | |
8e2745f4 | 820 | context->checkNoCache(); |
edce4d98 | 821 | } |
822 | ||
823 | void | |
8e2745f4 | 824 | ClientRequestContext::checkNoCache() |
edce4d98 | 825 | { |
edce4d98 | 826 | if (Config.accessList.noCache && http->request->flags.cachable) { |
62e76326 | 827 | acl_checklist = |
828 | clientAclChecklistCreate(Config.accessList.noCache, http); | |
829 | acl_checklist->nonBlockingCheck(CheckNoCacheDone, cbdataReference(this)); | |
edce4d98 | 830 | } else { |
62e76326 | 831 | CheckNoCacheDone(http->request->flags.cachable, cbdataReference(this)); |
edce4d98 | 832 | } |
833 | } | |
834 | ||
835 | void | |
8e2745f4 | 836 | ClientRequestContext::CheckNoCacheDone(int answer, void *data) |
edce4d98 | 837 | { |
4fb35c3c | 838 | void *temp; |
e4a67a80 | 839 | #ifndef PURIFY |
840 | ||
841 | bool valid = | |
842 | #endif | |
843 | cbdataReferenceValidDone(data, &temp); | |
8e2745f4 | 844 | /* acl NB calls cannot invalidate cbdata in the normal course of things */ |
4fb35c3c | 845 | assert (valid); |
8e2745f4 | 846 | ClientRequestContext *context = (ClientRequestContext *)temp; |
847 | context->checkNoCacheDone(answer); | |
848 | } | |
4fb35c3c | 849 | |
8e2745f4 | 850 | void |
851 | ClientRequestContext::checkNoCacheDone(int answer) | |
62e76326 | 852 | { |
8e2745f4 | 853 | acl_checklist = NULL; |
854 | clientHttpRequest *http_ = http; | |
8e2745f4 | 855 | |
3b1b4c07 | 856 | if (!cbdataReferenceValid (http_)) { |
00d77d6b | 857 | delete this; |
62e76326 | 858 | return; |
3b1b4c07 | 859 | } |
62e76326 | 860 | |
00d77d6b | 861 | delete this; |
8e2745f4 | 862 | http_->request->flags.cachable = answer; |
863 | http_->processRequest(); | |
edce4d98 | 864 | } |
865 | ||
69660be0 | 866 | /* |
867 | * Identify requests that do not go through the store and client side stream | |
868 | * and forward them to the appropriate location. All other requests, request | |
869 | * them. | |
edce4d98 | 870 | */ |
871 | void | |
8e2745f4 | 872 | ClientHttpRequest::processRequest() |
edce4d98 | 873 | { |
edce4d98 | 874 | debug(85, 4) ("clientProcessRequest: %s '%s'\n", |
62e76326 | 875 | RequestMethodStr[request->method], uri); |
876 | ||
8e2745f4 | 877 | if (request->method == METHOD_CONNECT) { |
62e76326 | 878 | logType = LOG_TCP_MISS; |
879 | sslStart(this, &out.size, &al.http.code); | |
880 | return; | |
edce4d98 | 881 | } |
62e76326 | 882 | |
8e2745f4 | 883 | httpStart(); |
884 | } | |
885 | ||
886 | void | |
887 | ClientHttpRequest::httpStart() | |
888 | { | |
889 | logType = LOG_TAG_NONE; | |
890 | debug(85, 4) ("ClientHttpRequest::httpStart: %s for '%s'\n", | |
62e76326 | 891 | log_tags[logType], uri); |
edce4d98 | 892 | /* no one should have touched this */ |
8e2745f4 | 893 | assert(out.offset == 0); |
edce4d98 | 894 | /* Use the Stream Luke */ |
8e2745f4 | 895 | clientStreamNode *node = (clientStreamNode *)client_stream.tail->data; |
896 | clientStreamRead(node, this, node->readBuffer); | |
edce4d98 | 897 | } |
0655fa4d | 898 | |
899 | bool | |
900 | ClientHttpRequest::gotEnough() const | |
901 | { | |
86a2f789 | 902 | /** TODO: should be querying the stream. */ |
0655fa4d | 903 | int contentLength = |
86a2f789 | 904 | httpReplyBodySize(request->method, memObject()->getReply()); |
0655fa4d | 905 | assert(contentLength >= 0); |
906 | ||
907 | if (out.offset < contentLength) | |
908 | return false; | |
909 | ||
910 | return true; | |
911 | } | |
912 | ||
b51aec66 | 913 | void |
914 | ClientHttpRequest::maxReplyBodySize(ssize_t clen) | |
915 | { | |
916 | maxReplyBodySize_ = clen; | |
917 | } | |
918 | ||
919 | ssize_t | |
920 | ClientHttpRequest::maxReplyBodySize() const | |
921 | { | |
922 | return maxReplyBodySize_; | |
923 | } | |
924 | ||
925 | bool | |
926 | ClientHttpRequest::isReplyBodyTooLarge(ssize_t clen) const | |
927 | { | |
928 | if (0 == maxReplyBodySize()) | |
929 | return 0; /* disabled */ | |
930 | ||
931 | if (clen < 0) | |
932 | return 0; /* unknown */ | |
933 | ||
934 | return clen > maxReplyBodySize(); | |
935 | } | |
86a2f789 | 936 | |
937 | void | |
938 | ClientHttpRequest::storeEntry(StoreEntry *newEntry) | |
939 | { | |
940 | entry_ = newEntry; | |
941 | } | |
942 | ||
0976f8db | 943 | void |
944 | ClientHttpRequest::loggingEntry(StoreEntry *newEntry) | |
945 | { | |
946 | if (loggingEntry_) | |
947 | storeUnlockObject(loggingEntry_); | |
948 | ||
949 | loggingEntry_ = newEntry; | |
950 | ||
951 | if (loggingEntry_) | |
952 | storeLockObject(loggingEntry_); | |
953 | } | |
86a2f789 | 954 | |
955 | #ifndef _USE_INLINE_ | |
956 | #include "client_side_request.cci" | |
957 | #endif |