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edce4d98 | 1 | |
2 | /* | |
a9925b40 | 3 | * $Id: client_side_request.cc,v 1.64 2006/05/06 22:13:18 wessels 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" |
de31d06f | 56 | #include "ClientRequestContext.h" |
d295d770 | 57 | #include "wordlist.h" |
de31d06f | 58 | |
59 | #if ICAP_CLIENT | |
60 | #include "ICAP/ICAPClientReqmodPrecache.h" | |
61 | #include "ICAP/ICAPElements.h" | |
62 | #include "ICAP/ICAPConfig.h" | |
63 | static void icapAclCheckDoneWrapper(ICAPServiceRep::Pointer service, void *data); | |
ab7ac359 | 64 | extern ICAPConfig TheICAPConfig; |
de31d06f | 65 | #endif |
edce4d98 | 66 | |
67 | #if LINGERING_CLOSE | |
68 | #define comm_close comm_lingering_close | |
69 | #endif | |
70 | ||
71 | static const char *const crlf = "\r\n"; | |
72 | ||
8e2745f4 | 73 | CBDATA_CLASS_INIT(ClientRequestContext); |
74 | ||
75 | void * | |
76 | ClientRequestContext::operator new (size_t size) | |
77 | { | |
78 | assert (size == sizeof(ClientRequestContext)); | |
79 | CBDATA_INIT_TYPE(ClientRequestContext); | |
80 | ClientRequestContext *result = cbdataAlloc(ClientRequestContext); | |
aa625860 | 81 | return result; |
8e2745f4 | 82 | } |
62e76326 | 83 | |
8e2745f4 | 84 | void |
85 | ClientRequestContext::operator delete (void *address) | |
86 | { | |
87 | ClientRequestContext *t = static_cast<ClientRequestContext *>(address); | |
aa625860 | 88 | cbdataFree(t); |
8e2745f4 | 89 | } |
90 | ||
edce4d98 | 91 | /* Local functions */ |
edce4d98 | 92 | /* other */ |
de31d06f | 93 | static void clientAccessCheckDoneWrapper(int, void *); |
59a1efb2 | 94 | static int clientCachable(ClientHttpRequest * http); |
95 | static int clientHierarchical(ClientHttpRequest * http); | |
96 | static void clientInterpretRequestHeaders(ClientHttpRequest * http); | |
de31d06f | 97 | static RH clientRedirectDoneWrapper; |
98 | static PF checkNoCacheDoneWrapper; | |
e6ccf245 | 99 | extern "C" CSR clientGetMoreData; |
100 | extern "C" CSS clientReplyStatus; | |
101 | extern "C" CSD clientReplyDetach; | |
528b2c61 | 102 | static void checkFailureRatio(err_type, hier_code); |
edce4d98 | 103 | |
8e2745f4 | 104 | ClientRequestContext::~ClientRequestContext() |
105 | { | |
de31d06f | 106 | /* |
a546b04b | 107 | * Release our "lock" on our parent, ClientHttpRequest, if we |
108 | * still have one | |
de31d06f | 109 | */ |
a546b04b | 110 | |
111 | if (http) | |
112 | cbdataReferenceDone(http); | |
62e76326 | 113 | |
501b58f9 | 114 | if (acl_checklist) { |
115 | if (acl_checklist->asyncInProgress()) { | |
116 | acl_checklist->markDeleteWhenDone(); | |
117 | } else { | |
118 | delete acl_checklist; | |
119 | } | |
120 | } | |
8e2745f4 | 121 | } |
122 | ||
de31d06f | 123 | ClientRequestContext::ClientRequestContext(ClientHttpRequest *anHttp) : http(anHttp), acl_checklist (NULL), redirect_state (REDIRECT_NONE) |
edce4d98 | 124 | { |
de31d06f | 125 | (void) cbdataReference(http); |
57abaac0 | 126 | http_access_done = false; |
127 | redirect_done = false; | |
128 | no_cache_done = false; | |
129 | interpreted_req_hdrs = false; | |
edce4d98 | 130 | } |
131 | ||
528b2c61 | 132 | CBDATA_CLASS_INIT(ClientHttpRequest); |
8e2745f4 | 133 | |
528b2c61 | 134 | void * |
135 | ClientHttpRequest::operator new (size_t size) | |
136 | { | |
137 | assert (size == sizeof (ClientHttpRequest)); | |
138 | CBDATA_INIT_TYPE(ClientHttpRequest); | |
139 | ClientHttpRequest *result = cbdataAlloc(ClientHttpRequest); | |
aa625860 | 140 | return result; |
528b2c61 | 141 | } |
142 | ||
62e76326 | 143 | void |
528b2c61 | 144 | ClientHttpRequest::operator delete (void *address) |
145 | { | |
aa625860 | 146 | ClientHttpRequest *t = static_cast<ClientHttpRequest *>(address); |
147 | cbdataFree(t); | |
528b2c61 | 148 | } |
149 | ||
a0355e95 | 150 | ClientHttpRequest::ClientHttpRequest(ConnStateData::Pointer aConn) : loggingEntry_(NULL) |
528b2c61 | 151 | { |
528b2c61 | 152 | start = current_time; |
a0355e95 | 153 | setConn(aConn); |
154 | dlinkAdd(this, &active, &ClientActiveRequests); | |
b044675d | 155 | #if ICAP_CLIENT |
156 | ||
157 | request_satisfaction_mode = false; | |
158 | #endif | |
528b2c61 | 159 | } |
160 | ||
0655fa4d | 161 | /* |
162 | * returns true if client specified that the object must come from the cache | |
163 | * without contacting origin server | |
164 | */ | |
165 | bool | |
166 | ClientHttpRequest::onlyIfCached()const | |
167 | { | |
168 | assert(request); | |
169 | return request->cache_control && | |
170 | EBIT_TEST(request->cache_control->mask, CC_ONLY_IF_CACHED); | |
171 | } | |
172 | ||
528b2c61 | 173 | /* |
174 | * This function is designed to serve a fairly specific purpose. | |
175 | * Occasionally our vBNS-connected caches can talk to each other, but not | |
176 | * the rest of the world. Here we try to detect frequent failures which | |
177 | * make the cache unusable (e.g. DNS lookup and connect() failures). If | |
178 | * the failure:success ratio goes above 1.0 then we go into "hit only" | |
179 | * mode where we only return UDP_HIT or UDP_MISS_NOFETCH. Neighbors | |
180 | * will only fetch HITs from us if they are using the ICP protocol. We | |
181 | * stay in this mode for 5 minutes. | |
182 | * | |
183 | * Duane W., Sept 16, 1996 | |
184 | */ | |
185 | ||
186 | #define FAILURE_MODE_TIME 300 | |
187 | ||
188 | static void | |
189 | checkFailureRatio(err_type etype, hier_code hcode) | |
190 | { | |
191 | static double magic_factor = 100.0; | |
192 | double n_good; | |
193 | double n_bad; | |
62e76326 | 194 | |
528b2c61 | 195 | if (hcode == HIER_NONE) |
62e76326 | 196 | return; |
197 | ||
528b2c61 | 198 | n_good = magic_factor / (1.0 + request_failure_ratio); |
62e76326 | 199 | |
528b2c61 | 200 | n_bad = magic_factor - n_good; |
62e76326 | 201 | |
528b2c61 | 202 | switch (etype) { |
62e76326 | 203 | |
528b2c61 | 204 | case ERR_DNS_FAIL: |
62e76326 | 205 | |
528b2c61 | 206 | case ERR_CONNECT_FAIL: |
62e76326 | 207 | |
528b2c61 | 208 | case ERR_READ_ERROR: |
62e76326 | 209 | n_bad++; |
210 | break; | |
211 | ||
528b2c61 | 212 | default: |
62e76326 | 213 | n_good++; |
528b2c61 | 214 | } |
62e76326 | 215 | |
528b2c61 | 216 | request_failure_ratio = n_bad / n_good; |
62e76326 | 217 | |
528b2c61 | 218 | if (hit_only_mode_until > squid_curtime) |
62e76326 | 219 | return; |
220 | ||
528b2c61 | 221 | if (request_failure_ratio < 1.0) |
62e76326 | 222 | return; |
223 | ||
528b2c61 | 224 | debug(33, 0) ("Failure Ratio at %4.2f\n", request_failure_ratio); |
62e76326 | 225 | |
528b2c61 | 226 | debug(33, 0) ("Going into hit-only-mode for %d minutes...\n", |
62e76326 | 227 | FAILURE_MODE_TIME / 60); |
228 | ||
528b2c61 | 229 | hit_only_mode_until = squid_curtime + FAILURE_MODE_TIME; |
62e76326 | 230 | |
528b2c61 | 231 | request_failure_ratio = 0.8; /* reset to something less than 1.0 */ |
232 | } | |
233 | ||
234 | ClientHttpRequest::~ClientHttpRequest() | |
235 | { | |
236 | debug(33, 3) ("httpRequestFree: %s\n", uri); | |
237 | /* if body_connection !NULL, then ProcessBody has not | |
238 | * found the end of the body yet | |
239 | */ | |
62e76326 | 240 | |
3b299123 | 241 | if (request && request->body_reader != NULL) { |
242 | request->body_reader = NULL; // refcounted | |
243 | debugs(32,3,HERE << "setting body_reader = NULL for request " << request); | |
21b92762 | 244 | } |
62e76326 | 245 | |
528b2c61 | 246 | /* the ICP check here was erroneous |
247 | * - storeReleaseRequest was always called if entry was valid | |
248 | */ | |
249 | assert(logType < LOG_TYPE_MAX); | |
62e76326 | 250 | |
528b2c61 | 251 | logRequest(); |
62e76326 | 252 | |
0976f8db | 253 | loggingEntry(NULL); |
254 | ||
528b2c61 | 255 | if (request) |
62e76326 | 256 | checkFailureRatio(request->errType, al.hier.code); |
257 | ||
528b2c61 | 258 | freeResources(); |
62e76326 | 259 | |
de31d06f | 260 | #if ICAP_CLIENT |
261 | ||
262 | if (icap) { | |
263 | delete icap; | |
264 | cbdataReferenceDone(icap); | |
265 | } | |
266 | ||
267 | #endif | |
268 | if (calloutContext) | |
269 | delete calloutContext; | |
270 | ||
528b2c61 | 271 | /* moving to the next connection is handled by the context free */ |
272 | dlinkDelete(&active, &ClientActiveRequests); | |
273 | } | |
62e76326 | 274 | |
edce4d98 | 275 | /* Create a request and kick it off */ |
69660be0 | 276 | /* |
277 | * TODO: Pass in the buffers to be used in the inital Read request, as they are | |
278 | * determined by the user | |
edce4d98 | 279 | */ |
280 | int /* returns nonzero on failure */ | |
281 | clientBeginRequest(method_t method, char const *url, CSCB * streamcallback, | |
0655fa4d | 282 | CSD * streamdetach, ClientStreamData streamdata, HttpHeader const *header, |
62e76326 | 283 | char *tailbuf, size_t taillen) |
edce4d98 | 284 | { |
285 | size_t url_sz; | |
450e0c10 | 286 | HttpVersion http_ver (1, 0); |
a0355e95 | 287 | ClientHttpRequest *http = new ClientHttpRequest(NULL); |
190154cf | 288 | HttpRequest *request; |
528b2c61 | 289 | StoreIOBuffer tempBuffer; |
edce4d98 | 290 | http->start = current_time; |
291 | /* this is only used to adjust the connection offset in client_side.c */ | |
292 | http->req_sz = 0; | |
c8be6d7b | 293 | tempBuffer.length = taillen; |
294 | tempBuffer.data = tailbuf; | |
edce4d98 | 295 | /* client stream setup */ |
296 | clientStreamInit(&http->client_stream, clientGetMoreData, clientReplyDetach, | |
0655fa4d | 297 | clientReplyStatus, new clientReplyContext(http), streamcallback, |
62e76326 | 298 | streamdetach, streamdata, tempBuffer); |
edce4d98 | 299 | /* make it visible in the 'current acctive requests list' */ |
edce4d98 | 300 | /* Set flags */ |
a46d2c0e | 301 | /* internal requests only makes sense in an |
302 | * accelerator today. TODO: accept flags ? */ | |
303 | http->flags.accel = 1; | |
edce4d98 | 304 | /* allow size for url rewriting */ |
305 | url_sz = strlen(url) + Config.appendDomainLen + 5; | |
e6ccf245 | 306 | http->uri = (char *)xcalloc(url_sz, 1); |
edce4d98 | 307 | strcpy(http->uri, url); |
308 | ||
c21ad0f5 | 309 | if ((request = HttpRequest::CreateFromUrlAndMethod(http->uri, method)) == NULL) { |
62e76326 | 310 | debug(85, 5) ("Invalid URL: %s\n", http->uri); |
311 | return -1; | |
edce4d98 | 312 | } |
62e76326 | 313 | |
69660be0 | 314 | /* |
315 | * now update the headers in request with our supplied headers. urLParse | |
316 | * should return a blank header set, but we use Update to be sure of | |
317 | * correctness. | |
edce4d98 | 318 | */ |
319 | if (header) | |
a9925b40 | 320 | request->header.update(header, NULL); |
62e76326 | 321 | |
edce4d98 | 322 | http->log_uri = xstrdup(urlCanonicalClean(request)); |
62e76326 | 323 | |
edce4d98 | 324 | /* http struct now ready */ |
325 | ||
69660be0 | 326 | /* |
327 | * build new header list *? TODO | |
edce4d98 | 328 | */ |
329 | request->flags.accelerated = http->flags.accel; | |
62e76326 | 330 | |
a46d2c0e | 331 | request->flags.internalclient = 1; |
332 | ||
333 | /* this is an internally created | |
334 | * request, not subject to acceleration | |
335 | * target overrides */ | |
69660be0 | 336 | /* |
337 | * FIXME? Do we want to detect and handle internal requests of internal | |
338 | * objects ? | |
339 | */ | |
edce4d98 | 340 | |
341 | /* Internally created requests cannot have bodies today */ | |
342 | request->content_length = 0; | |
62e76326 | 343 | |
edce4d98 | 344 | request->client_addr = no_addr; |
62e76326 | 345 | |
edce4d98 | 346 | request->my_addr = no_addr; /* undefined for internal requests */ |
62e76326 | 347 | |
edce4d98 | 348 | request->my_port = 0; |
62e76326 | 349 | |
edce4d98 | 350 | request->http_ver = http_ver; |
62e76326 | 351 | |
6dd9f4bd | 352 | http->request = HTTPMSGLOCK(request); |
edce4d98 | 353 | |
354 | /* optional - skip the access check ? */ | |
de31d06f | 355 | http->calloutContext = new ClientRequestContext(http); |
356 | ||
57abaac0 | 357 | http->calloutContext->http_access_done = false; |
de31d06f | 358 | |
57abaac0 | 359 | http->calloutContext->redirect_done = true; |
de31d06f | 360 | |
57abaac0 | 361 | http->calloutContext->no_cache_done = true; |
de31d06f | 362 | |
363 | http->doCallouts(); | |
62e76326 | 364 | |
edce4d98 | 365 | return 0; |
366 | } | |
367 | ||
de31d06f | 368 | bool |
369 | ClientRequestContext::httpStateIsValid() | |
370 | { | |
371 | ClientHttpRequest *http_ = http; | |
372 | ||
373 | if (cbdataReferenceValid(http_)) | |
374 | return true; | |
375 | ||
376 | http = NULL; | |
377 | ||
378 | cbdataReferenceDone(http_); | |
379 | ||
380 | return false; | |
381 | } | |
382 | ||
edce4d98 | 383 | /* This is the entry point for external users of the client_side routines */ |
384 | void | |
de31d06f | 385 | ClientRequestContext::clientAccessCheck() |
edce4d98 | 386 | { |
de31d06f | 387 | acl_checklist = |
62e76326 | 388 | clientAclChecklistCreate(Config.accessList.http, http); |
de31d06f | 389 | acl_checklist->nonBlockingCheck(clientAccessCheckDoneWrapper, this); |
edce4d98 | 390 | } |
391 | ||
392 | void | |
de31d06f | 393 | clientAccessCheckDoneWrapper(int answer, void *data) |
edce4d98 | 394 | { |
de31d06f | 395 | ClientRequestContext *calloutContext = (ClientRequestContext *) data; |
fbade053 | 396 | |
de31d06f | 397 | if (!calloutContext->httpStateIsValid()) |
62e76326 | 398 | return; |
62e76326 | 399 | |
de31d06f | 400 | calloutContext->clientAccessCheckDone(answer); |
401 | } | |
402 | ||
403 | void | |
404 | ClientRequestContext::clientAccessCheckDone(int answer) | |
405 | { | |
406 | acl_checklist = NULL; | |
edce4d98 | 407 | err_type page_id; |
408 | http_status status; | |
edce4d98 | 409 | debug(85, 2) ("The request %s %s is %s, because it matched '%s'\n", |
62e76326 | 410 | RequestMethodStr[http->request->method], http->uri, |
411 | answer == ACCESS_ALLOWED ? "ALLOWED" : "DENIED", | |
412 | AclMatchedName ? AclMatchedName : "NO ACL's"); | |
f5691f9c | 413 | char const *proxy_auth_msg = "<null>"; |
414 | ||
415 | if (http->getConn().getRaw() != NULL && http->getConn()->auth_user_request != NULL) | |
416 | proxy_auth_msg = http->getConn()->auth_user_request->denyMessage("<null>"); | |
417 | else if (http->request->auth_user_request != NULL) | |
418 | proxy_auth_msg = http->request->auth_user_request->denyMessage("<null>"); | |
62e76326 | 419 | |
de31d06f | 420 | if (answer != ACCESS_ALLOWED) { |
62e76326 | 421 | /* Send an error */ |
62e76326 | 422 | debug(85, 5) ("Access Denied: %s\n", http->uri); |
423 | debug(85, 5) ("AclMatchedName = %s\n", | |
424 | AclMatchedName ? AclMatchedName : "<null>"); | |
425 | debug(85, 5) ("Proxy Auth Message = %s\n", | |
426 | proxy_auth_msg ? proxy_auth_msg : "<null>"); | |
427 | /* | |
428 | * NOTE: get page_id here, based on AclMatchedName because if | |
429 | * USE_DELAY_POOLS is enabled, then AclMatchedName gets clobbered in | |
430 | * the clientCreateStoreEntry() call just below. Pedro Ribeiro | |
431 | * <pribeiro@isel.pt> | |
432 | */ | |
433 | page_id = aclGetDenyInfoPage(&Config.denyInfoList, AclMatchedName); | |
434 | http->logType = LOG_TCP_DENIED; | |
435 | ||
436 | if (answer == ACCESS_REQ_PROXY_AUTH || aclIsProxyAuth(AclMatchedName)) { | |
437 | if (!http->flags.accel) { | |
438 | /* Proxy authorisation needed */ | |
439 | status = HTTP_PROXY_AUTHENTICATION_REQUIRED; | |
440 | } else { | |
441 | /* WWW authorisation needed */ | |
442 | status = HTTP_UNAUTHORIZED; | |
443 | } | |
444 | ||
445 | if (page_id == ERR_NONE) | |
446 | page_id = ERR_CACHE_ACCESS_DENIED; | |
447 | } else { | |
448 | status = HTTP_FORBIDDEN; | |
449 | ||
450 | if (page_id == ERR_NONE) | |
451 | page_id = ERR_ACCESS_DENIED; | |
452 | } | |
453 | ||
de31d06f | 454 | clientStreamNode *node = (clientStreamNode *)http->client_stream.tail->prev->data; |
0655fa4d | 455 | clientReplyContext *repContext = dynamic_cast<clientReplyContext *>(node->data.getRaw()); |
456 | assert (repContext); | |
457 | repContext->setReplyToError(page_id, status, | |
458 | http->request->method, NULL, | |
a2ac85d9 | 459 | http->getConn().getRaw() != NULL ? &http->getConn()->peer.sin_addr : &no_addr, http->request, |
460 | NULL, http->getConn().getRaw() != NULL | |
98242069 | 461 | && http->getConn()->auth_user_request ? http->getConn()-> |
0655fa4d | 462 | auth_user_request : http->request->auth_user_request); |
62e76326 | 463 | node = (clientStreamNode *)http->client_stream.tail->data; |
464 | clientStreamRead(node, http, node->readBuffer); | |
a546b04b | 465 | return; |
edce4d98 | 466 | } |
de31d06f | 467 | |
468 | /* ACCESS_ALLOWED continues here ... */ | |
469 | safe_free(http->uri); | |
470 | ||
471 | http->uri = xstrdup(urlCanonical(http->request)); | |
472 | ||
473 | http->doCallouts(); | |
474 | } | |
475 | ||
476 | #if ICAP_CLIENT | |
477 | void | |
478 | ClientRequestContext::icapAccessCheck() | |
479 | { | |
480 | ICAPAccessCheck *icap_access_check; | |
481 | ||
e8fe1384 | 482 | icap_access_check = new ICAPAccessCheck(ICAP::methodReqmod, ICAP::pointPreCache, http->request, NULL, icapAclCheckDoneWrapper, this); |
483 | ||
484 | if (icap_access_check != NULL) { | |
de31d06f | 485 | icap_access_check->check(); |
486 | return; | |
487 | } | |
488 | ||
489 | http->doCallouts(); | |
490 | } | |
491 | ||
492 | static void | |
493 | icapAclCheckDoneWrapper(ICAPServiceRep::Pointer service, void *data) | |
494 | { | |
495 | ClientRequestContext *calloutContext = (ClientRequestContext *)data; | |
496 | ||
497 | if (!calloutContext->httpStateIsValid()) | |
498 | return; | |
499 | ||
500 | calloutContext->icapAclCheckDone(service); | |
501 | } | |
502 | ||
503 | void | |
504 | ClientRequestContext::icapAclCheckDone(ICAPServiceRep::Pointer service) | |
505 | { | |
506 | /* | |
507 | * No matching ICAP service in the config file | |
508 | */ | |
509 | ||
510 | if (service == NULL) { | |
511 | http->doCallouts(); | |
512 | return; | |
513 | } | |
514 | ||
515 | /* | |
516 | * Setup ICAP state and such. If successful, just return. | |
517 | * We'll get back to doCallouts() after REQMOD is done. | |
518 | */ | |
519 | if (0 == http->doIcap(service)) | |
520 | return; | |
521 | ||
522 | /* | |
523 | * If doIcap() fails, then we have to either return an error | |
524 | * to the user, or keep going without ICAP. | |
525 | */ | |
526 | fatal("Fix this case in ClientRequestContext::icapAclCheckDone()"); | |
527 | ||
528 | http->doCallouts(); | |
edce4d98 | 529 | } |
530 | ||
de31d06f | 531 | #endif |
532 | ||
14cc8559 | 533 | static void |
534 | clientRedirectAccessCheckDone(int answer, void *data) | |
535 | { | |
536 | ClientRequestContext *context = (ClientRequestContext *)data; | |
59a1efb2 | 537 | ClientHttpRequest *http = context->http; |
14cc8559 | 538 | context->acl_checklist = NULL; |
539 | ||
540 | if (answer == ACCESS_ALLOWED) | |
de31d06f | 541 | redirectStart(http, clientRedirectDoneWrapper, context); |
14cc8559 | 542 | else |
de31d06f | 543 | context->clientRedirectDone(NULL); |
14cc8559 | 544 | } |
545 | ||
de31d06f | 546 | void |
547 | ClientRequestContext::clientRedirectStart() | |
14cc8559 | 548 | { |
14cc8559 | 549 | debug(33, 5) ("clientRedirectStart: '%s'\n", http->uri); |
550 | ||
14cc8559 | 551 | if (Config.accessList.redirector) { |
de31d06f | 552 | acl_checklist = clientAclChecklistCreate(Config.accessList.redirector, http); |
553 | acl_checklist->nonBlockingCheck(clientRedirectAccessCheckDone, this); | |
14cc8559 | 554 | } else |
de31d06f | 555 | redirectStart(http, clientRedirectDoneWrapper, this); |
14cc8559 | 556 | } |
557 | ||
edce4d98 | 558 | static int |
59a1efb2 | 559 | clientCachable(ClientHttpRequest * http) |
edce4d98 | 560 | { |
190154cf | 561 | HttpRequest *req = http->request; |
edce4d98 | 562 | method_t method = req->method; |
62e76326 | 563 | |
edce4d98 | 564 | if (req->protocol == PROTO_HTTP) |
62e76326 | 565 | return httpCachable(method); |
566 | ||
edce4d98 | 567 | /* FTP is always cachable */ |
568 | if (req->protocol == PROTO_WAIS) | |
62e76326 | 569 | return 0; |
570 | ||
69660be0 | 571 | /* |
572 | * The below looks questionable: what non HTTP protocols use connect, | |
573 | * trace, put and post? RC | |
edce4d98 | 574 | */ |
575 | if (method == METHOD_CONNECT) | |
62e76326 | 576 | return 0; |
577 | ||
edce4d98 | 578 | if (method == METHOD_TRACE) |
62e76326 | 579 | return 0; |
580 | ||
edce4d98 | 581 | if (method == METHOD_PUT) |
62e76326 | 582 | return 0; |
583 | ||
edce4d98 | 584 | if (method == METHOD_POST) |
a46d2c0e | 585 | return 0; |
586 | ||
587 | /* XXX POST may be cached sometimes.. ignored | |
588 | ||
589 | * for now */ | |
edce4d98 | 590 | if (req->protocol == PROTO_GOPHER) |
62e76326 | 591 | return gopherCachable(req); |
592 | ||
edce4d98 | 593 | if (req->protocol == PROTO_CACHEOBJ) |
62e76326 | 594 | return 0; |
595 | ||
edce4d98 | 596 | return 1; |
597 | } | |
598 | ||
599 | static int | |
59a1efb2 | 600 | clientHierarchical(ClientHttpRequest * http) |
edce4d98 | 601 | { |
602 | const char *url = http->uri; | |
190154cf | 603 | HttpRequest *request = http->request; |
edce4d98 | 604 | method_t method = request->method; |
605 | const wordlist *p = NULL; | |
606 | ||
69660be0 | 607 | /* |
608 | * IMS needs a private key, so we can use the hierarchy for IMS only if our | |
609 | * neighbors support private keys | |
610 | */ | |
62e76326 | 611 | |
edce4d98 | 612 | if (request->flags.ims && !neighbors_do_private_keys) |
62e76326 | 613 | return 0; |
614 | ||
69660be0 | 615 | /* |
616 | * This is incorrect: authenticating requests can be sent via a hierarchy | |
06b97e72 | 617 | * (they can even be cached if the correct headers are set on the reply) |
edce4d98 | 618 | */ |
619 | if (request->flags.auth) | |
62e76326 | 620 | return 0; |
621 | ||
edce4d98 | 622 | if (method == METHOD_TRACE) |
62e76326 | 623 | return 1; |
624 | ||
edce4d98 | 625 | if (method != METHOD_GET) |
62e76326 | 626 | return 0; |
627 | ||
edce4d98 | 628 | /* scan hierarchy_stoplist */ |
629 | for (p = Config.hierarchy_stoplist; p; p = p->next) | |
62e76326 | 630 | if (strstr(url, p->key)) |
631 | return 0; | |
632 | ||
edce4d98 | 633 | if (request->flags.loopdetect) |
62e76326 | 634 | return 0; |
635 | ||
edce4d98 | 636 | if (request->protocol == PROTO_HTTP) |
62e76326 | 637 | return httpCachable(method); |
638 | ||
edce4d98 | 639 | if (request->protocol == PROTO_GOPHER) |
62e76326 | 640 | return gopherCachable(request); |
641 | ||
edce4d98 | 642 | if (request->protocol == PROTO_WAIS) |
62e76326 | 643 | return 0; |
644 | ||
edce4d98 | 645 | if (request->protocol == PROTO_CACHEOBJ) |
62e76326 | 646 | return 0; |
647 | ||
edce4d98 | 648 | return 1; |
649 | } | |
650 | ||
651 | ||
652 | static void | |
59a1efb2 | 653 | clientInterpretRequestHeaders(ClientHttpRequest * http) |
edce4d98 | 654 | { |
190154cf | 655 | HttpRequest *request = http->request; |
edce4d98 | 656 | const HttpHeader *req_hdr = &request->header; |
657 | int no_cache = 0; | |
a787b56a | 658 | #if !(ESI) || defined(USE_USERAGENT_LOG) || defined(USE_REFERER_LOG) |
62e76326 | 659 | |
edce4d98 | 660 | const char *str; |
661 | #endif | |
62e76326 | 662 | |
edce4d98 | 663 | request->imslen = -1; |
a9925b40 | 664 | request->ims = req_hdr->getTime(HDR_IF_MODIFIED_SINCE); |
62e76326 | 665 | |
edce4d98 | 666 | if (request->ims > 0) |
62e76326 | 667 | request->flags.ims = 1; |
668 | ||
edce4d98 | 669 | #if ESI |
69660be0 | 670 | /* |
671 | * We ignore Cache-Control as per the Edge Architecture Section 3. See | |
672 | * www.esi.org for more information. | |
edce4d98 | 673 | */ |
674 | #else | |
62e76326 | 675 | |
a9925b40 | 676 | if (req_hdr->has(HDR_PRAGMA)) { |
677 | String s = req_hdr->getList(HDR_PRAGMA); | |
62e76326 | 678 | |
679 | if (strListIsMember(&s, "no-cache", ',')) | |
680 | no_cache++; | |
681 | ||
682 | s.clean(); | |
edce4d98 | 683 | } |
62e76326 | 684 | |
edce4d98 | 685 | if (request->cache_control) |
62e76326 | 686 | if (EBIT_TEST(request->cache_control->mask, CC_NO_CACHE)) |
687 | no_cache++; | |
688 | ||
69660be0 | 689 | /* |
62e76326 | 690 | * Work around for supporting the Reload button in IE browsers when Squid |
691 | * is used as an accelerator or transparent proxy, by turning accelerated | |
692 | * IMS request to no-cache requests. Now knows about IE 5.5 fix (is | |
693 | * actually only fixed in SP1, but we can't tell whether we are talking to | |
694 | * SP1 or not so all 5.5 versions are treated 'normally'). | |
695 | */ | |
edce4d98 | 696 | if (Config.onoff.ie_refresh) { |
62e76326 | 697 | if (http->flags.accel && request->flags.ims) { |
a9925b40 | 698 | if ((str = req_hdr->getStr(HDR_USER_AGENT))) { |
62e76326 | 699 | if (strstr(str, "MSIE 5.01") != NULL) |
700 | no_cache++; | |
701 | else if (strstr(str, "MSIE 5.0") != NULL) | |
702 | no_cache++; | |
703 | else if (strstr(str, "MSIE 4.") != NULL) | |
704 | no_cache++; | |
705 | else if (strstr(str, "MSIE 3.") != NULL) | |
706 | no_cache++; | |
707 | } | |
708 | } | |
edce4d98 | 709 | } |
62e76326 | 710 | |
edce4d98 | 711 | #endif |
712 | if (no_cache) { | |
713 | #if HTTP_VIOLATIONS | |
62e76326 | 714 | |
715 | if (Config.onoff.reload_into_ims) | |
716 | request->flags.nocache_hack = 1; | |
717 | else if (refresh_nocache_hack) | |
718 | request->flags.nocache_hack = 1; | |
719 | else | |
edce4d98 | 720 | #endif |
62e76326 | 721 | |
722 | request->flags.nocache = 1; | |
edce4d98 | 723 | } |
62e76326 | 724 | |
edce4d98 | 725 | /* ignore range header in non-GETs */ |
726 | if (request->method == METHOD_GET) { | |
a9925b40 | 727 | request->range = req_hdr->getRange(); |
62e76326 | 728 | |
729 | if (request->range) { | |
730 | request->flags.range = 1; | |
731 | clientStreamNode *node = (clientStreamNode *)http->client_stream.tail->data; | |
732 | /* XXX: This is suboptimal. We should give the stream the range set, | |
733 | * and thereby let the top of the stream set the offset when the | |
734 | * size becomes known. As it is, we will end up requesting from 0 | |
735 | * for evey -X range specification. | |
736 | * RBC - this may be somewhat wrong. We should probably set the range | |
737 | * iter up at this point. | |
738 | */ | |
739 | node->readBuffer.offset = request->range->lowestOffset(0); | |
740 | http->range_iter.pos = request->range->begin(); | |
741 | http->range_iter.valid = true; | |
742 | } | |
edce4d98 | 743 | } |
62e76326 | 744 | |
a9925b40 | 745 | if (req_hdr->has(HDR_AUTHORIZATION)) |
62e76326 | 746 | request->flags.auth = 1; |
747 | ||
edce4d98 | 748 | if (request->login[0] != '\0') |
62e76326 | 749 | request->flags.auth = 1; |
750 | ||
a9925b40 | 751 | if (req_hdr->has(HDR_VIA)) { |
752 | String s = req_hdr->getList(HDR_VIA); | |
62e76326 | 753 | /* |
754 | * ThisCache cannot be a member of Via header, "1.0 ThisCache" can. | |
755 | * Note ThisCache2 has a space prepended to the hostname so we don't | |
756 | * accidentally match super-domains. | |
757 | */ | |
758 | ||
759 | if (strListIsSubstr(&s, ThisCache2, ',')) { | |
760 | debugObj(33, 1, "WARNING: Forwarding loop detected for:\n", | |
761 | request, (ObjPackMethod) & httpRequestPack); | |
762 | request->flags.loopdetect = 1; | |
763 | } | |
764 | ||
edce4d98 | 765 | #if FORW_VIA_DB |
62e76326 | 766 | fvdbCountVia(s.buf()); |
767 | ||
edce4d98 | 768 | #endif |
62e76326 | 769 | |
770 | s.clean(); | |
edce4d98 | 771 | } |
62e76326 | 772 | |
edce4d98 | 773 | #if USE_USERAGENT_LOG |
a9925b40 | 774 | if ((str = req_hdr->getStr(HDR_USER_AGENT))) |
7928e475 | 775 | logUserAgent(fqdnFromAddr(http->getConn().getRaw() ? http->getConn()->log_addr : no_addr), str); |
62e76326 | 776 | |
edce4d98 | 777 | #endif |
778 | #if USE_REFERER_LOG | |
62e76326 | 779 | |
a9925b40 | 780 | if ((str = req_hdr->getStr(HDR_REFERER))) |
7928e475 | 781 | logReferer(fqdnFromAddr(http->getConn().getRaw() ? http->getConn()->log_addr : no_addr), str, http->log_uri); |
62e76326 | 782 | |
edce4d98 | 783 | #endif |
784 | #if FORW_VIA_DB | |
62e76326 | 785 | |
a9925b40 | 786 | if (req_hdr->has(HDR_X_FORWARDED_FOR)) { |
787 | String s = req_hdr->getList(HDR_X_FORWARDED_FOR); | |
62e76326 | 788 | fvdbCountForw(s.buf()); |
789 | s.clean(); | |
edce4d98 | 790 | } |
62e76326 | 791 | |
edce4d98 | 792 | #endif |
793 | if (request->method == METHOD_TRACE) { | |
a9925b40 | 794 | request->max_forwards = req_hdr->getInt(HDR_MAX_FORWARDS); |
edce4d98 | 795 | } |
62e76326 | 796 | |
edce4d98 | 797 | if (clientCachable(http)) |
62e76326 | 798 | request->flags.cachable = 1; |
799 | ||
edce4d98 | 800 | if (clientHierarchical(http)) |
62e76326 | 801 | request->flags.hierarchical = 1; |
802 | ||
edce4d98 | 803 | debug(85, 5) ("clientInterpretRequestHeaders: REQ_NOCACHE = %s\n", |
62e76326 | 804 | request->flags.nocache ? "SET" : "NOT SET"); |
805 | ||
edce4d98 | 806 | debug(85, 5) ("clientInterpretRequestHeaders: REQ_CACHABLE = %s\n", |
62e76326 | 807 | request->flags.cachable ? "SET" : "NOT SET"); |
808 | ||
edce4d98 | 809 | debug(85, 5) ("clientInterpretRequestHeaders: REQ_HIERARCHICAL = %s\n", |
62e76326 | 810 | request->flags.hierarchical ? "SET" : "NOT SET"); |
edce4d98 | 811 | } |
812 | ||
813 | void | |
de31d06f | 814 | clientRedirectDoneWrapper(void *data, char *result) |
edce4d98 | 815 | { |
de31d06f | 816 | ClientRequestContext *calloutContext = (ClientRequestContext *)data; |
db02222f | 817 | |
de31d06f | 818 | if (!calloutContext->httpStateIsValid()) |
62e76326 | 819 | return; |
62e76326 | 820 | |
de31d06f | 821 | calloutContext->clientRedirectDone(result); |
822 | } | |
823 | ||
824 | void | |
825 | ClientRequestContext::clientRedirectDone(char *result) | |
826 | { | |
190154cf | 827 | HttpRequest *new_request = NULL; |
828 | HttpRequest *old_request = http->request; | |
edce4d98 | 829 | debug(85, 5) ("clientRedirectDone: '%s' result=%s\n", http->uri, |
62e76326 | 830 | result ? result : "NULL"); |
de31d06f | 831 | assert(redirect_state == REDIRECT_PENDING); |
832 | redirect_state = REDIRECT_DONE; | |
62e76326 | 833 | |
edce4d98 | 834 | if (result) { |
62e76326 | 835 | http_status status = (http_status) atoi(result); |
836 | ||
837 | if (status == HTTP_MOVED_PERMANENTLY | |
838 | || status == HTTP_MOVED_TEMPORARILY | |
839 | || status == HTTP_SEE_OTHER | |
840 | || status == HTTP_TEMPORARY_REDIRECT) { | |
841 | char *t = result; | |
842 | ||
843 | if ((t = strchr(result, ':')) != NULL) { | |
844 | http->redirect.status = status; | |
845 | http->redirect.location = xstrdup(t + 1); | |
846 | } else { | |
847 | debug(85, 1) ("clientRedirectDone: bad input: %s\n", result); | |
848 | } | |
2baf58c3 | 849 | } else if (strcmp(result, http->uri)) |
c21ad0f5 | 850 | new_request = HttpRequest::CreateFromUrlAndMethod(result, old_request->method); |
edce4d98 | 851 | } |
62e76326 | 852 | |
edce4d98 | 853 | if (new_request) { |
62e76326 | 854 | safe_free(http->uri); |
855 | http->uri = xstrdup(urlCanonical(new_request)); | |
856 | new_request->http_ver = old_request->http_ver; | |
a9925b40 | 857 | new_request->header.append(&old_request->header); |
62e76326 | 858 | new_request->client_addr = old_request->client_addr; |
47b0c1fa | 859 | new_request->client_port = old_request->client_port; |
62e76326 | 860 | new_request->my_addr = old_request->my_addr; |
861 | new_request->my_port = old_request->my_port; | |
862 | new_request->flags = old_request->flags; | |
3c1f01bc | 863 | new_request->flags.redirected = 1; |
62e76326 | 864 | |
865 | if (old_request->auth_user_request) { | |
866 | new_request->auth_user_request = old_request->auth_user_request; | |
f5691f9c | 867 | |
868 | new_request->auth_user_request->lock() | |
869 | ||
870 | ; | |
62e76326 | 871 | } |
872 | ||
3b299123 | 873 | if (old_request->body_reader != NULL) { |
874 | new_request->body_reader = old_request->body_reader; | |
875 | old_request->body_reader = NULL; | |
876 | debugs(0,0,HERE << "setting body_reader = NULL for request " << old_request); | |
62e76326 | 877 | } |
878 | ||
879 | new_request->content_length = old_request->content_length; | |
abb929f0 | 880 | new_request->extacl_user = old_request->extacl_user; |
881 | new_request->extacl_passwd = old_request->extacl_passwd; | |
62e76326 | 882 | new_request->flags.proxy_keepalive = old_request->flags.proxy_keepalive; |
6dd9f4bd | 883 | HTTPMSGUNLOCK(old_request); |
884 | http->request = HTTPMSGLOCK(new_request); | |
edce4d98 | 885 | } |
62e76326 | 886 | |
edce4d98 | 887 | /* FIXME PIPELINE: This is innacurate during pipelining */ |
62e76326 | 888 | |
a2ac85d9 | 889 | if (http->getConn().getRaw() != NULL) |
98242069 | 890 | fd_note(http->getConn()->fd, http->uri); |
62e76326 | 891 | |
c8be6d7b | 892 | assert(http->uri); |
62e76326 | 893 | |
de31d06f | 894 | http->doCallouts(); |
edce4d98 | 895 | } |
896 | ||
897 | void | |
8e2745f4 | 898 | ClientRequestContext::checkNoCache() |
edce4d98 | 899 | { |
de31d06f | 900 | acl_checklist = clientAclChecklistCreate(Config.accessList.noCache, http); |
57abaac0 | 901 | acl_checklist->nonBlockingCheck(checkNoCacheDoneWrapper, this); |
edce4d98 | 902 | } |
903 | ||
de31d06f | 904 | static void |
905 | checkNoCacheDoneWrapper(int answer, void *data) | |
edce4d98 | 906 | { |
de31d06f | 907 | ClientRequestContext *calloutContext = (ClientRequestContext *) data; |
e4a67a80 | 908 | |
de31d06f | 909 | if (!calloutContext->httpStateIsValid()) |
910 | return; | |
911 | ||
912 | calloutContext->checkNoCacheDone(answer); | |
8e2745f4 | 913 | } |
4fb35c3c | 914 | |
8e2745f4 | 915 | void |
916 | ClientRequestContext::checkNoCacheDone(int answer) | |
62e76326 | 917 | { |
8e2745f4 | 918 | acl_checklist = NULL; |
de31d06f | 919 | http->request->flags.cachable = answer; |
920 | http->doCallouts(); | |
edce4d98 | 921 | } |
922 | ||
69660be0 | 923 | /* |
924 | * Identify requests that do not go through the store and client side stream | |
925 | * and forward them to the appropriate location. All other requests, request | |
926 | * them. | |
edce4d98 | 927 | */ |
928 | void | |
8e2745f4 | 929 | ClientHttpRequest::processRequest() |
edce4d98 | 930 | { |
edce4d98 | 931 | debug(85, 4) ("clientProcessRequest: %s '%s'\n", |
62e76326 | 932 | RequestMethodStr[request->method], uri); |
933 | ||
2baf58c3 | 934 | if (request->method == METHOD_CONNECT && !redirect.status) { |
62e76326 | 935 | logType = LOG_TCP_MISS; |
936 | sslStart(this, &out.size, &al.http.code); | |
937 | return; | |
edce4d98 | 938 | } |
62e76326 | 939 | |
8e2745f4 | 940 | httpStart(); |
941 | } | |
942 | ||
943 | void | |
944 | ClientHttpRequest::httpStart() | |
945 | { | |
946 | logType = LOG_TAG_NONE; | |
947 | debug(85, 4) ("ClientHttpRequest::httpStart: %s for '%s'\n", | |
62e76326 | 948 | log_tags[logType], uri); |
edce4d98 | 949 | /* no one should have touched this */ |
8e2745f4 | 950 | assert(out.offset == 0); |
edce4d98 | 951 | /* Use the Stream Luke */ |
8e2745f4 | 952 | clientStreamNode *node = (clientStreamNode *)client_stream.tail->data; |
953 | clientStreamRead(node, this, node->readBuffer); | |
edce4d98 | 954 | } |
0655fa4d | 955 | |
956 | bool | |
957 | ClientHttpRequest::gotEnough() const | |
958 | { | |
86a2f789 | 959 | /** TODO: should be querying the stream. */ |
0655fa4d | 960 | int contentLength = |
06a5ae20 | 961 | memObject()->getReply()->bodySize(request->method); |
0655fa4d | 962 | assert(contentLength >= 0); |
963 | ||
964 | if (out.offset < contentLength) | |
965 | return false; | |
966 | ||
967 | return true; | |
968 | } | |
969 | ||
b51aec66 | 970 | void |
971 | ClientHttpRequest::maxReplyBodySize(ssize_t clen) | |
972 | { | |
973 | maxReplyBodySize_ = clen; | |
974 | } | |
975 | ||
976 | ssize_t | |
977 | ClientHttpRequest::maxReplyBodySize() const | |
978 | { | |
979 | return maxReplyBodySize_; | |
980 | } | |
981 | ||
982 | bool | |
983 | ClientHttpRequest::isReplyBodyTooLarge(ssize_t clen) const | |
984 | { | |
985 | if (0 == maxReplyBodySize()) | |
986 | return 0; /* disabled */ | |
987 | ||
988 | if (clen < 0) | |
989 | return 0; /* unknown */ | |
990 | ||
991 | return clen > maxReplyBodySize(); | |
992 | } | |
86a2f789 | 993 | |
994 | void | |
995 | ClientHttpRequest::storeEntry(StoreEntry *newEntry) | |
996 | { | |
997 | entry_ = newEntry; | |
998 | } | |
999 | ||
0976f8db | 1000 | void |
1001 | ClientHttpRequest::loggingEntry(StoreEntry *newEntry) | |
1002 | { | |
1003 | if (loggingEntry_) | |
1004 | storeUnlockObject(loggingEntry_); | |
1005 | ||
1006 | loggingEntry_ = newEntry; | |
1007 | ||
1008 | if (loggingEntry_) | |
1009 | storeLockObject(loggingEntry_); | |
1010 | } | |
86a2f789 | 1011 | |
de31d06f | 1012 | /* |
1013 | * doCallouts() - This function controls the order of "callout" | |
1014 | * executions, including non-blocking access control checks, the | |
1015 | * redirector, and ICAP. Previously, these callouts were chained | |
1016 | * together such that "clientAccessCheckDone()" would call | |
1017 | * "clientRedirectStart()" and so on. | |
1018 | * | |
1019 | * The ClientRequestContext (aka calloutContext) class holds certain | |
1020 | * state data for the callout/callback operations. Previously | |
1021 | * ClientHttpRequest would sort of hand off control to ClientRequestContext | |
1022 | * for a short time. ClientRequestContext would then delete itself | |
1023 | * and pass control back to ClientHttpRequest when all callouts | |
1024 | * were finished. | |
1025 | * | |
1026 | * This caused some problems for ICAP because we want to make the | |
1027 | * ICAP callout after checking ACLs, but before checking the no_cache | |
1028 | * list. We can't stuff the ICAP state into the ClientRequestContext | |
1029 | * class because we still need the ICAP state after ClientRequestContext | |
1030 | * goes away. | |
1031 | * | |
1032 | * Note that ClientRequestContext is created before the first call | |
1033 | * to doCallouts(). | |
1034 | * | |
1035 | * If one of the callouts notices that ClientHttpRequest is no | |
1036 | * longer valid, it should call cbdataReferenceDone() so that | |
1037 | * ClientHttpRequest's reference count goes to zero and it will get | |
1038 | * deleted. ClientHttpRequest will then delete ClientRequestContext. | |
1039 | * | |
1040 | * Note that we set the _done flags here before actually starting | |
1041 | * the callout. This is strictly for convenience. | |
1042 | */ | |
1043 | ||
1044 | void | |
1045 | ClientHttpRequest::doCallouts() | |
1046 | { | |
1047 | assert(calloutContext); | |
1048 | ||
1049 | if (!calloutContext->http_access_done) { | |
57abaac0 | 1050 | calloutContext->http_access_done = true; |
de31d06f | 1051 | calloutContext->clientAccessCheck(); |
1052 | return; | |
1053 | } | |
1054 | ||
1055 | #if ICAP_CLIENT | |
ab7ac359 | 1056 | if (TheICAPConfig.onoff && !calloutContext->icap_acl_check_done) { |
57abaac0 | 1057 | calloutContext->icap_acl_check_done = true; |
de31d06f | 1058 | calloutContext->icapAccessCheck(); |
1059 | return; | |
1060 | } | |
1061 | ||
1062 | #endif | |
1063 | ||
1064 | if (!calloutContext->redirect_done) { | |
57abaac0 | 1065 | calloutContext->redirect_done = true; |
de31d06f | 1066 | assert(calloutContext->redirect_state == REDIRECT_NONE); |
1067 | ||
1068 | if (Config.Program.redirect) { | |
1069 | calloutContext->redirect_state = REDIRECT_PENDING; | |
1070 | calloutContext->clientRedirectStart(); | |
1071 | return; | |
1072 | } | |
1073 | } | |
1074 | ||
57abaac0 | 1075 | if (!calloutContext->interpreted_req_hdrs) { |
1076 | calloutContext->interpreted_req_hdrs = 1; | |
1077 | clientInterpretRequestHeaders(this); | |
1078 | } | |
1079 | ||
de31d06f | 1080 | if (!calloutContext->no_cache_done) { |
57abaac0 | 1081 | calloutContext->no_cache_done = true; |
de31d06f | 1082 | |
1083 | if (Config.accessList.noCache && request->flags.cachable) { | |
1084 | calloutContext->checkNoCache(); | |
1085 | return; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | cbdataReferenceDone(calloutContext->http); | |
1090 | delete calloutContext; | |
1091 | calloutContext = NULL; | |
de31d06f | 1092 | #if HEADERS_LOG |
1093 | ||
1094 | headersLog(0, 1, request->method, request); | |
1095 | #endif | |
1096 | ||
1097 | processRequest(); | |
1098 | } | |
1099 | ||
86a2f789 | 1100 | #ifndef _USE_INLINE_ |
1101 | #include "client_side_request.cci" | |
1102 | #endif | |
de31d06f | 1103 | |
1104 | #if ICAP_CLIENT | |
1105 | /* | |
1106 | * Initiate an ICAP transaction. Return 0 if all is well, or -1 upon error. | |
1107 | * Caller will handle error condition by generating a Squid error message | |
1108 | * or take other action. | |
1109 | */ | |
1110 | int | |
1111 | ClientHttpRequest::doIcap(ICAPServiceRep::Pointer service) | |
1112 | { | |
1113 | debug(85,3)("ClientHttpRequest::doIcap() called\n"); | |
1114 | assert(NULL == icap); | |
1115 | icap = new ICAPClientReqmodPrecache(service); | |
1116 | (void) cbdataReference(icap); | |
1117 | icap->startReqMod(this, request); | |
3b299123 | 1118 | |
1119 | if (request->body_reader == NULL) { | |
1120 | debugs(32,3,HERE << "client request hasnt body..."); | |
1121 | icap->doneSending(); | |
1122 | ||
1123 | } | |
1124 | ||
de31d06f | 1125 | return 0; |
1126 | } | |
1127 | ||
3b299123 | 1128 | /* |
1129 | * icapSendRequestBodyWrapper | |
1130 | * | |
1131 | * A callback wrapper for ::icapSendRequestBody() | |
1132 | * | |
1133 | * icapSendRequestBodyWrapper is of type CBCB | |
1134 | */ | |
1135 | void | |
1136 | ClientHttpRequest::icapSendRequestBodyWrapper(MemBuf &mb, void *data) | |
1137 | { | |
1138 | ClientHttpRequest *chr = static_cast<ClientHttpRequest*>(data); | |
1139 | chr->icapSendRequestBody(mb); | |
1140 | } | |
1141 | ||
1142 | ||
1143 | /* | |
1144 | * icapSendRequestBody | |
1145 | * | |
1146 | * Sends some chunk of a request body to the ICAP side. Must make sure | |
1147 | * that the ICAP-side can accept the data we have. If there is more | |
1148 | * body data to read, then schedule another BodyReader callback. | |
1149 | */ | |
1150 | void | |
1151 | ClientHttpRequest::icapSendRequestBody(MemBuf &mb) | |
1152 | { | |
1153 | ssize_t size_to_send = mb.contentSize(); | |
1154 | debugs(32,3,HERE << "have " << mb.contentSize() << " bytes in mb"); | |
1155 | ||
1156 | if (size_to_send == 0) { | |
1157 | /* | |
1158 | * An error occurred during this transaction. Tell ICAP that we're done. | |
1159 | */ | |
1160 | ||
1161 | if (icap) | |
1162 | icap->doneSending(); | |
1163 | ||
1164 | return; | |
1165 | } | |
1166 | ||
1167 | debugs(32,3,HERE << "icap->potentialSpaceSize() = " << icap->potentialSpaceSize()); | |
1168 | ||
1169 | if (size_to_send > icap->potentialSpaceSize()) | |
1170 | size_to_send = icap->potentialSpaceSize(); | |
1171 | ||
1172 | if (size_to_send) { | |
1173 | debugs(32,3,HERE << "sending " << size_to_send << " body bytes to ICAP"); | |
1174 | StoreIOBuffer sbuf(size_to_send, 0, mb.content()); | |
1175 | icap->sendMoreData(sbuf); | |
1176 | icap->body_reader->consume(size_to_send); | |
1177 | icap->body_reader->bytes_read += size_to_send; | |
1178 | debugs(32,3," HTTP client body bytes_read=" << icap->body_reader->bytes_read); | |
1179 | } else { | |
1180 | debugs(32,0,HERE << "cannot send body data to ICAP"); | |
1181 | debugs(32,0,HERE << "\tBodyReader MemBuf has " << mb.contentSize()); | |
1182 | debugs(32,0,HERE << "\tbut icap->potentialSpaceSize() is " << icap->potentialSpaceSize()); | |
1183 | return; | |
1184 | } | |
1185 | ||
1186 | /* | |
1187 | * If we sent some data this time, and there is more data to | |
1188 | * read, then schedule another read request via BodyReader. | |
1189 | */ | |
1190 | if (size_to_send && icap->body_reader->remaining()) { | |
1191 | debugs(32,3,HERE << "calling body_reader->read()"); | |
1192 | icap->body_reader->read(icapSendRequestBodyWrapper, this); | |
1193 | } else { | |
1194 | debugs(32,3,HERE << "No more request body bytes to send"); | |
1195 | icap->doneSending(); | |
1196 | } | |
1197 | } | |
1198 | ||
de31d06f | 1199 | /* |
1200 | * Called by ICAPAnchor when it has space available for us. | |
1201 | */ | |
1202 | void | |
1203 | ClientHttpRequest::icapSpaceAvailable() | |
1204 | { | |
3b299123 | 1205 | debugs(85,3,HERE << this << " ClientHttpRequest::icapSpaceAvailable() called\n"); |
1206 | ||
1207 | if (request->body_reader != NULL && icap->body_reader == NULL) { | |
1208 | debugs(32,3,HERE << "reassigning HttpRequest->body_reader to ICAP"); | |
1209 | /* | |
1210 | * ICAP hooks on to the BodyReader that gets data from | |
1211 | * ConnStateData. We'll make a new BodyReader that | |
1212 | * HttpStateData can use if the adapted response has a | |
1213 | * request body. See ICAPClientReqmodPrecache::noteSourceStart() | |
1214 | */ | |
1215 | icap->body_reader = request->body_reader; | |
1216 | request->body_reader = NULL; | |
1217 | } | |
1218 | ||
1219 | if (icap->body_reader == NULL) | |
1220 | return; | |
1221 | ||
1222 | if (icap->body_reader->callbackPending()) | |
1223 | return; | |
1224 | ||
1225 | debugs(32,3,HERE << "Calling read() for body data"); | |
1226 | ||
1227 | icap->body_reader->read(icapSendRequestBodyWrapper, this); | |
de31d06f | 1228 | } |
1229 | ||
1230 | void | |
1231 | ClientHttpRequest::takeAdaptedHeaders(HttpMsg *msg) | |
1232 | { | |
1233 | debug(85,3)("ClientHttpRequest::takeAdaptedHeaders() called\n"); | |
1234 | assert(cbdataReferenceValid(this)); // indicates bug | |
1235 | ||
b044675d | 1236 | if (HttpRequest *new_req = dynamic_cast<HttpRequest*>(msg)) { |
200ac359 | 1237 | /* |
1238 | * Replace the old request with the new request. First, | |
1239 | * Move the "body_connection" over, then unlink old and | |
1240 | * link new to the http state. | |
1241 | */ | |
6dd9f4bd | 1242 | HTTPMSGUNLOCK(request); |
1243 | request = HTTPMSGLOCK(new_req); | |
200ac359 | 1244 | /* |
1245 | * Store the new URI for logging | |
1246 | */ | |
1247 | xfree(uri); | |
1248 | uri = xstrdup(urlCanonical(request)); | |
1249 | setLogUri(this, urlCanonicalClean(request)); | |
1250 | assert(request->method); | |
b044675d | 1251 | } else if (HttpReply *new_rep = dynamic_cast<HttpReply*>(msg)) { |
1252 | debugs(85,3,HERE << "REQMOD reply is HTTP reply"); | |
1253 | ||
1254 | clientStreamNode *node = (clientStreamNode *)client_stream.tail->prev->data; | |
1255 | clientReplyContext *repContext = dynamic_cast<clientReplyContext *>(node->data.getRaw()); | |
1256 | repContext->createStoreEntry(request->method, request->flags); | |
1257 | ||
1258 | EBIT_CLR(storeEntry()->flags, ENTRY_FWD_HDR_WAIT); | |
1259 | request_satisfaction_mode = true; | |
1260 | request_satisfaction_offset = 0; | |
1261 | storeEntry()->replaceHttpReply(new_rep); | |
1262 | clientGetMoreData(node, this); | |
200ac359 | 1263 | } |
de31d06f | 1264 | |
b044675d | 1265 | if (!request_satisfaction_mode) |
1266 | doCallouts(); | |
de31d06f | 1267 | |
1268 | debug(85,3)("ClientHttpRequest::takeAdaptedHeaders() finished\n"); | |
1269 | } | |
1270 | ||
1271 | void | |
1272 | ClientHttpRequest::takeAdaptedBody(MemBuf *buf) | |
1273 | { | |
1274 | debug(85,3)("ClientHttpRequest::takeAdaptedBody() called\n"); | |
b044675d | 1275 | |
1276 | if (request_satisfaction_mode) { | |
1277 | storeEntry()->write(StoreIOBuffer(buf, request_satisfaction_offset)); | |
1278 | request_satisfaction_offset += buf->contentSize(); | |
1279 | buf->consume(buf->contentSize()); // consume everything written | |
1280 | } | |
de31d06f | 1281 | } |
1282 | ||
1283 | void | |
1284 | ClientHttpRequest::doneAdapting() | |
1285 | { | |
1286 | debug(85,3)("ClientHttpRequest::doneAdapting() called\n"); | |
1287 | } | |
1288 | ||
1289 | void | |
1290 | ClientHttpRequest::abortAdapting() | |
1291 | { | |
1292 | debug(85,3)("ClientHttpRequest::abortAdapting() called\n"); | |
1293 | ||
1294 | if ((NULL == storeEntry()) || storeEntry()->isEmpty()) { | |
1295 | debug(85,3)("WARNING: ICAP REQMOD callout failed, proceeding with original request\n"); | |
3b299123 | 1296 | |
1297 | if (calloutContext) | |
1298 | doCallouts(); | |
1299 | ||
de31d06f | 1300 | #if ICAP_HARD_ERROR |
1301 | ||
1302 | clientStreamNode *node = (clientStreamNode *)client_stream.tail->prev->data; | |
3b299123 | 1303 | |
de31d06f | 1304 | clientReplyContext *repContext = dynamic_cast<clientReplyContext *>(node->data.getRaw()); |
3b299123 | 1305 | |
de31d06f | 1306 | assert (repContext); |
3b299123 | 1307 | |
de31d06f | 1308 | // Note if this code is ever used, clientBuildError() should be modified to |
1309 | // accept an errno arg | |
1310 | repContext->setReplyToError(ERR_ICAP_FAILURE, HTTP_INTERNAL_SERVER_ERROR, | |
1311 | request->method, NULL, | |
1312 | getConn().getRaw() != NULL ? &getConn()->peer.sin_addr : &no_addr, request, | |
1313 | NULL, getConn().getRaw() != NULL | |
1314 | && getConn()->auth_user_request ? getConn()-> | |
1315 | auth_user_request : request->auth_user_request, errno); | |
3b299123 | 1316 | |
de31d06f | 1317 | node = (clientStreamNode *)client_stream.tail->data; |
3b299123 | 1318 | |
de31d06f | 1319 | clientStreamRead(node, this, node->readBuffer); |
3b299123 | 1320 | |
de31d06f | 1321 | #endif |
1322 | ||
1323 | return; | |
1324 | } | |
1325 | ||
1326 | debug(0,0)("write me at %s:%d\n", __FILE__,__LINE__); | |
1327 | } | |
1328 | ||
1329 | #endif |