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edce4d98 | 1 | /* |
262a0e14 | 2 | * $Id$ |
edce4d98 | 3 | * |
4 | * DEBUG: section 88 Client-side Reply Routines | |
5 | * AUTHOR: Robert Collins (Originally Duane Wessels in client_side.c) | |
6 | * | |
7 | * SQUID Web Proxy Cache http://www.squid-cache.org/ | |
8 | * ---------------------------------------------------------- | |
9 | * | |
10 | * Squid is the result of efforts by numerous individuals from | |
11 | * the Internet community; see the CONTRIBUTORS file for full | |
12 | * details. Many organizations have provided support for Squid's | |
13 | * development; see the SPONSORS file for full details. Squid is | |
14 | * Copyrighted (C) 2001 by the Regents of the University of | |
15 | * California; see the COPYRIGHT file for full details. Squid | |
16 | * incorporates software developed and/or copyrighted by other | |
17 | * sources; see the CREDITS file for full details. | |
18 | * | |
19 | * This program is free software; you can redistribute it and/or modify | |
20 | * it under the terms of the GNU General Public License as published by | |
21 | * the Free Software Foundation; either version 2 of the License, or | |
22 | * (at your option) any later version. | |
26ac0430 | 23 | * |
edce4d98 | 24 | * This program is distributed in the hope that it will be useful, |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | * GNU General Public License for more details. | |
26ac0430 | 28 | * |
edce4d98 | 29 | * You should have received a copy of the GNU General Public License |
30 | * along with this program; if not, write to the Free Software | |
31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
32 | * | |
33 | */ | |
f7f3304a | 34 | #include "squid.h" |
b7ac5457 AJ |
35 | #include "acl/FilledChecklist.h" |
36 | #include "acl/Gadgets.h" | |
65d448bc | 37 | #include "anyp/PortCfg.h" |
0655fa4d | 38 | #include "client_side_reply.h" |
582c2af2 | 39 | #include "client_side.h" |
c8be6d7b | 40 | #include "clientStream.h" |
582c2af2 | 41 | #include "dlink.h" |
b7ac5457 | 42 | #include "errorpage.h" |
7172612f | 43 | #include "fde.h" |
31971e6a | 44 | #include "format/Token.h" |
582c2af2 FC |
45 | #include "forward.h" |
46 | #include "globals.h" | |
47 | #include "globals.h" | |
b7ac5457 AJ |
48 | #include "HttpReply.h" |
49 | #include "HttpRequest.h" | |
50 | #include "ip/QosConfig.h" | |
714e68b7 | 51 | #include "ipcache.h" |
1c7ae5ff | 52 | #include "log/access_log.h" |
b7ac5457 | 53 | #include "MemObject.h" |
f0ba2534 | 54 | #include "neighbors.h" |
582c2af2 | 55 | #include "protos.h" |
c6f15d40 | 56 | #include "refresh.h" |
985c86bc | 57 | #include "SquidTime.h" |
b7ac5457 | 58 | #include "Store.h" |
582c2af2 | 59 | #include "StoreClient.h" |
4e540555 | 60 | #include "tools.h" |
b1bd952a | 61 | #include "URL.h" |
582c2af2 FC |
62 | #if USE_AUTH |
63 | #include "auth/UserRequest.h" | |
64 | #endif | |
65 | #if USE_DELAY_POOLS | |
66 | #include "DelayPools.h" | |
67 | #endif | |
68 | #if USE_SQUID_ESI | |
69 | #include "esi/Esi.h" | |
70 | #endif | |
e6ccf245 | 71 | |
0655fa4d | 72 | CBDATA_CLASS_INIT(clientReplyContext); |
edce4d98 | 73 | |
edce4d98 | 74 | /* Local functions */ |
e6ccf245 | 75 | extern "C" CSS clientReplyStatus; |
b7ac5457 | 76 | extern ErrorState *clientBuildError(err_type, http_status, char const *, Ip::Address &, HttpRequest *); |
edce4d98 | 77 | |
edce4d98 | 78 | /* privates */ |
edce4d98 | 79 | |
0655fa4d | 80 | clientReplyContext::~clientReplyContext() |
edce4d98 | 81 | { |
50c09fc4 | 82 | deleting = true; |
83 | /* This may trigger a callback back into SendMoreData as the cbdata | |
84 | * is still valid | |
85 | */ | |
86a2f789 | 86 | removeClientStoreReference(&sc, http); |
edce4d98 | 87 | /* old_entry might still be set if we didn't yet get the reply |
0655fa4d | 88 | * code in HandleIMSReply() */ |
89 | removeStoreReference(&old_sc, &old_entry); | |
90 | safe_free(tempBuffer.data); | |
91 | cbdataReferenceDone(http); | |
2b7d324b | 92 | HTTPMSGUNLOCK(reply); |
edce4d98 | 93 | } |
94 | ||
59a1efb2 | 95 | clientReplyContext::clientReplyContext(ClientHttpRequest *clientContext) : http (cbdataReference(clientContext)), old_entry (NULL), old_sc(NULL), deleting(false) |
0655fa4d | 96 | {} |
edce4d98 | 97 | |
a5c8d64d AJ |
98 | /** Create an error in the store awaiting the client side to read it. |
99 | * | |
100 | * This may be better placed in the clientStream logic, but it has not been | |
0655fa4d | 101 | * relocated there yet |
102 | */ | |
edce4d98 | 103 | void |
0655fa4d | 104 | clientReplyContext::setReplyToError( |
60745f24 | 105 | err_type err, http_status status, const HttpRequestMethod& method, char const *uri, |
b7ac5457 | 106 | Ip::Address &addr, HttpRequest * failedrequest, const char *unparsedrequest, |
2f1431ea | 107 | #if USE_AUTH |
c7baff40 | 108 | Auth::UserRequest::Pointer auth_user_request |
2f1431ea | 109 | #else |
9d2b8284 | 110 | void* |
2f1431ea | 111 | #endif |
74174c03 | 112 | ) |
edce4d98 | 113 | { |
a33a428a | 114 | ErrorState *errstate = clientBuildError(err, status, uri, addr, failedrequest); |
62e76326 | 115 | |
edce4d98 | 116 | if (unparsedrequest) |
62e76326 | 117 | errstate->request_hdrs = xstrdup(unparsedrequest); |
edce4d98 | 118 | |
8eb0a7ee CT |
119 | #if USE_AUTH |
120 | errstate->auth_user_request = auth_user_request; | |
121 | #endif | |
122 | setReplyToError(method, errstate); | |
123 | } | |
124 | ||
125 | void clientReplyContext::setReplyToError(const HttpRequestMethod& method, ErrorState *errstate) | |
126 | { | |
127 | if (errstate->httpStatus == HTTP_NOT_IMPLEMENTED && http->request) | |
62e76326 | 128 | /* prevent confusion over whether we default to persistent or not */ |
0655fa4d | 129 | http->request->flags.proxy_keepalive = 0; |
62e76326 | 130 | |
41ebd397 | 131 | http->al->http.code = errstate->httpStatus; |
edce4d98 | 132 | |
0655fa4d | 133 | createStoreEntry(method, request_flags()); |
edce4d98 | 134 | assert(errstate->callback_data == NULL); |
86a2f789 | 135 | errorAppendEntry(http->storeEntry(), errstate); |
edce4d98 | 136 | /* Now the caller reads to get this */ |
137 | } | |
138 | ||
061bbdec CT |
139 | void clientReplyContext::setReplyToStoreEntry(StoreEntry *entry) |
140 | { | |
cb9060be | 141 | entry->lock(); // removeClientStoreReference() unlocks |
061bbdec CT |
142 | sc = storeClientListAdd(entry, this); |
143 | #if USE_DELAY_POOLS | |
144 | sc->setDelayId(DelayId::DelayClient(http)); | |
145 | #endif | |
146 | reqofs = 0; | |
147 | reqsize = 0; | |
148 | flags.storelogiccomplete = 1; | |
149 | http->storeEntry(entry); | |
150 | } | |
151 | ||
edce4d98 | 152 | void |
0655fa4d | 153 | clientReplyContext::removeStoreReference(store_client ** scp, |
154 | StoreEntry ** ep) | |
edce4d98 | 155 | { |
156 | StoreEntry *e; | |
e4ae841b | 157 | store_client *sc_tmp = *scp; |
62e76326 | 158 | |
edce4d98 | 159 | if ((e = *ep) != NULL) { |
62e76326 | 160 | *ep = NULL; |
e4ae841b | 161 | storeUnregister(sc_tmp, e, this); |
62e76326 | 162 | *scp = NULL; |
97b5e68f | 163 | e->unlock(); |
edce4d98 | 164 | } |
165 | } | |
166 | ||
86a2f789 | 167 | void |
8bcf08e0 | 168 | clientReplyContext::removeClientStoreReference(store_client **scp, ClientHttpRequest *aHttpRequest) |
86a2f789 | 169 | { |
8bcf08e0 | 170 | StoreEntry *reference = aHttpRequest->storeEntry(); |
86a2f789 | 171 | removeStoreReference(scp, &reference); |
8bcf08e0 | 172 | aHttpRequest->storeEntry(reference); |
86a2f789 | 173 | } |
174 | ||
e6ccf245 | 175 | void * |
a695955b | 176 | clientReplyContext::operator new (size_t byteCount) |
e6ccf245 | 177 | { |
178 | /* derived classes with different sizes must implement their own new */ | |
179 | assert (byteCount == sizeof (clientReplyContext)); | |
0655fa4d | 180 | CBDATA_INIT_TYPE(clientReplyContext); |
e6ccf245 | 181 | return cbdataAlloc(clientReplyContext); |
182 | } | |
183 | ||
184 | void | |
185 | clientReplyContext::operator delete (void *address) | |
186 | { | |
a50bfe93 | 187 | clientReplyContext * tmp = (clientReplyContext *)address; |
188 | cbdataFree (tmp); | |
e6ccf245 | 189 | } |
190 | ||
edce4d98 | 191 | void |
0655fa4d | 192 | clientReplyContext::saveState() |
edce4d98 | 193 | { |
e6ccf245 | 194 | assert(old_sc == NULL); |
bf8fe701 | 195 | debugs(88, 3, "clientReplyContext::saveState: saving store context"); |
86a2f789 | 196 | old_entry = http->storeEntry(); |
e6ccf245 | 197 | old_sc = sc; |
198 | old_reqsize = reqsize; | |
199 | tempBuffer.offset = reqofs; | |
edce4d98 | 200 | /* Prevent accessing the now saved entries */ |
86a2f789 | 201 | http->storeEntry(NULL); |
e6ccf245 | 202 | sc = NULL; |
203 | reqsize = 0; | |
204 | reqofs = 0; | |
edce4d98 | 205 | } |
206 | ||
207 | void | |
0655fa4d | 208 | clientReplyContext::restoreState() |
edce4d98 | 209 | { |
e6ccf245 | 210 | assert(old_sc != NULL); |
bf8fe701 | 211 | debugs(88, 3, "clientReplyContext::restoreState: Restoring store context"); |
86a2f789 | 212 | removeClientStoreReference(&sc, http); |
213 | http->storeEntry(old_entry); | |
e6ccf245 | 214 | sc = old_sc; |
215 | reqsize = old_reqsize; | |
216 | reqofs = tempBuffer.offset; | |
edce4d98 | 217 | /* Prevent accessed the old saved entries */ |
0655fa4d | 218 | old_entry = NULL; |
e6ccf245 | 219 | old_sc = NULL; |
220 | old_reqsize = 0; | |
221 | tempBuffer.offset = 0; | |
c8be6d7b | 222 | } |
223 | ||
224 | void | |
0655fa4d | 225 | clientReplyContext::startError(ErrorState * err) |
c8be6d7b | 226 | { |
0655fa4d | 227 | createStoreEntry(http->request->method, request_flags()); |
228 | triggerInitialStoreRead(); | |
86a2f789 | 229 | errorAppendEntry(http->storeEntry(), err); |
edce4d98 | 230 | } |
231 | ||
e6ccf245 | 232 | clientStreamNode * |
528b2c61 | 233 | clientReplyContext::getNextNode() const |
e6ccf245 | 234 | { |
62e76326 | 235 | return (clientStreamNode *)ourNode->node.next->data; |
e6ccf245 | 236 | } |
237 | ||
62e76326 | 238 | /* This function is wrong - the client parameters don't include the |
528b2c61 | 239 | * header offset |
240 | */ | |
c8be6d7b | 241 | void |
0655fa4d | 242 | clientReplyContext::triggerInitialStoreRead() |
c8be6d7b | 243 | { |
0655fa4d | 244 | /* when confident, 0 becomes reqofs, and then this factors into |
26ac0430 | 245 | * startSendProcess |
528b2c61 | 246 | */ |
0655fa4d | 247 | assert(reqofs == 0); |
8bcf08e0 FC |
248 | StoreIOBuffer localTempBuffer (next()->readBuffer.length, 0, next()->readBuffer.data); |
249 | storeClientCopy(sc, http->storeEntry(), localTempBuffer, SendMoreData, this); | |
c8be6d7b | 250 | } |
edce4d98 | 251 | |
252 | /* there is an expired entry in the store. | |
253 | * setup a temporary buffer area and perform an IMS to the origin | |
254 | */ | |
0655fa4d | 255 | void |
256 | clientReplyContext::processExpired() | |
edce4d98 | 257 | { |
edce4d98 | 258 | char *url = http->uri; |
259 | StoreEntry *entry = NULL; | |
bf8fe701 | 260 | debugs(88, 3, "clientReplyContext::processExpired: '" << http->uri << "'"); |
86a2f789 | 261 | assert(http->storeEntry()->lastmod >= 0); |
edce4d98 | 262 | /* |
263 | * check if we are allowed to contact other servers | |
26ac0430 | 264 | * @?@: Instead of a 504 (Gateway Timeout) reply, we may want to return |
edce4d98 | 265 | * a stale entry *if* it matches client requirements |
266 | */ | |
62e76326 | 267 | |
0655fa4d | 268 | if (http->onlyIfCached()) { |
269 | processOnlyIfCachedMiss(); | |
62e76326 | 270 | return; |
edce4d98 | 271 | } |
62e76326 | 272 | |
edce4d98 | 273 | http->request->flags.refresh = 1; |
274 | #if STORE_CLIENT_LIST_DEBUG | |
c8be6d7b | 275 | /* Prevent a race with the store client memory free routines |
edce4d98 | 276 | */ |
0655fa4d | 277 | assert(storeClientIsThisAClient(sc, this)); |
edce4d98 | 278 | #endif |
279 | /* Prepare to make a new temporary request */ | |
0655fa4d | 280 | saveState(); |
edce4d98 | 281 | entry = storeCreateEntry(url, |
62e76326 | 282 | http->log_uri, http->request->flags, http->request->method); |
34266cde | 283 | /* NOTE, don't call StoreEntry->lock(), storeCreateEntry() does it */ |
0655fa4d | 284 | sc = storeClientListAdd(entry, this); |
9a0a18de | 285 | #if USE_DELAY_POOLS |
edce4d98 | 286 | /* delay_id is already set on original store client */ |
0655fa4d | 287 | sc->setDelayId(DelayId::DelayClient(http)); |
edce4d98 | 288 | #endif |
62e76326 | 289 | |
0655fa4d | 290 | http->request->lastmod = old_entry->lastmod; |
4a7a3d56 | 291 | debugs(88, 5, "clientReplyContext::processExpired : lastmod " << entry->lastmod ); |
86a2f789 | 292 | http->storeEntry(entry); |
c8be6d7b | 293 | assert(http->out.offset == 0); |
9174ba3d | 294 | assert(http->request->clientConnectionManager == http->getConn()); |
655daa06 | 295 | |
b2d22df6 | 296 | /* |
297 | * A refcounted pointer so that FwdState stays around as long as | |
298 | * this clientReplyContext does | |
299 | */ | |
73c36fd9 | 300 | Comm::ConnectionPointer conn = http->getConn() != NULL ? http->getConn()->clientConnection : NULL; |
4bf68cfa | 301 | FwdState::Start(conn, http->storeEntry(), http->request, http->al); |
62e76326 | 302 | |
edce4d98 | 303 | /* Register with storage manager to receive updates when data comes in. */ |
62e76326 | 304 | |
edce4d98 | 305 | if (EBIT_TEST(entry->flags, ENTRY_ABORTED)) |
fa84c01d | 306 | debugs(88, DBG_CRITICAL, "clientReplyContext::processExpired: Found ENTRY_ABORTED object"); |
62e76326 | 307 | |
c8be6d7b | 308 | { |
62e76326 | 309 | /* start counting the length from 0 */ |
8bcf08e0 FC |
310 | StoreIOBuffer localTempBuffer(HTTP_REQBUF_SZ, 0, tempbuf); |
311 | storeClientCopy(sc, entry, localTempBuffer, HandleIMSReply, this); | |
edce4d98 | 312 | } |
313 | } | |
314 | ||
edce4d98 | 315 | |
528b2c61 | 316 | void |
317 | clientReplyContext::sendClientUpstreamResponse() | |
318 | { | |
319 | StoreIOBuffer tempresult; | |
0655fa4d | 320 | removeStoreReference(&old_sc, &old_entry); |
2324cda2 | 321 | /* here the data to send is the data we just received */ |
528b2c61 | 322 | tempBuffer.offset = 0; |
323 | old_reqsize = 0; | |
0655fa4d | 324 | /* sendMoreData tracks the offset as well. |
528b2c61 | 325 | * Force it back to zero */ |
326 | reqofs = 0; | |
86a2f789 | 327 | assert(!EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)); |
0655fa4d | 328 | /* TODO: provide sendMoreData with the ready parsed reply */ |
528b2c61 | 329 | tempresult.length = reqsize; |
330 | tempresult.data = tempbuf; | |
0655fa4d | 331 | sendMoreData(tempresult); |
528b2c61 | 332 | } |
333 | ||
edce4d98 | 334 | void |
0655fa4d | 335 | clientReplyContext::HandleIMSReply(void *data, StoreIOBuffer result) |
edce4d98 | 336 | { |
e6ccf245 | 337 | clientReplyContext *context = (clientReplyContext *)data; |
0655fa4d | 338 | context->handleIMSReply(result); |
339 | } | |
62e76326 | 340 | |
0655fa4d | 341 | void |
342 | clientReplyContext::sendClientOldEntry() | |
343 | { | |
344 | /* Get the old request back */ | |
345 | restoreState(); | |
346 | /* here the data to send is in the next nodes buffers already */ | |
86a2f789 | 347 | assert(!EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)); |
0655fa4d | 348 | /* sendMoreData tracks the offset as well. |
349 | * Force it back to zero */ | |
350 | reqofs = 0; | |
351 | StoreIOBuffer tempresult (reqsize, reqofs, next()->readBuffer.data); | |
352 | sendMoreData(tempresult); | |
353 | } | |
62e76326 | 354 | |
1d7ab0f4 | 355 | /* This is the workhorse of the HandleIMSReply callback. |
356 | * | |
357 | * It is called when we've got data back from the origin following our | |
358 | * IMS request to revalidate a stale entry. | |
359 | */ | |
0655fa4d | 360 | void |
1d7ab0f4 | 361 | clientReplyContext::handleIMSReply(StoreIOBuffer result) |
0655fa4d | 362 | { |
1d7ab0f4 | 363 | if (deleting) |
364 | return; | |
62e76326 | 365 | |
bf8fe701 | 366 | debugs(88, 3, "handleIMSReply: " << http->storeEntry()->url() << ", " << (long unsigned) result.length << " bytes" ); |
62e76326 | 367 | |
1d7ab0f4 | 368 | if (http->storeEntry() == NULL) |
369 | return; | |
07947ad8 | 370 | |
1d7ab0f4 | 371 | if (result.flags.error && !EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) |
372 | return; | |
62e76326 | 373 | |
1d7ab0f4 | 374 | /* update size of the request */ |
375 | reqsize = result.length + reqofs; | |
62e76326 | 376 | |
1d7ab0f4 | 377 | const http_status status = http->storeEntry()->getReply()->sline.status; |
62e76326 | 378 | |
1d7ab0f4 | 379 | // request to origin was aborted |
380 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) { | |
bf8fe701 | 381 | debugs(88, 3, "handleIMSReply: request to origin aborted '" << http->storeEntry()->url() << "', sending old entry to client" ); |
7948b784 | 382 | http->logType = LOG_TCP_REFRESH_FAIL_OLD; |
1d7ab0f4 | 383 | sendClientOldEntry(); |
0655fa4d | 384 | } |
62e76326 | 385 | |
b297bcd0 | 386 | HttpReply *old_rep = (HttpReply *) old_entry->getReply(); |
62e76326 | 387 | |
b297bcd0 | 388 | // origin replied 304 |
b297bcd0 | 389 | if (status == HTTP_NOT_MODIFIED) { |
26ac0430 | 390 | http->logType = LOG_TCP_REFRESH_UNMODIFIED; |
b52d0612 | 391 | http->request->flags.stale_if_hit = 0; // old_entry is no longer stale |
045a76ab | 392 | |
26ac0430 | 393 | // update headers on existing entry |
4802f60d | 394 | old_rep->updateOnNotModified(http->storeEntry()->getReply()); |
26ac0430 | 395 | old_entry->timestampsSet(); |
62e76326 | 396 | |
26ac0430 | 397 | // if client sent IMS |
62e76326 | 398 | |
ee15ba9b | 399 | if (http->request->flags.ims && !old_entry->modifiedSince(http->request)) { |
26ac0430 AJ |
400 | // forward the 304 from origin |
401 | debugs(88, 3, "handleIMSReply: origin replied 304, revalidating existing entry and forwarding 304 to client"); | |
402 | sendClientUpstreamResponse(); | |
403 | } else { | |
404 | // send existing entry, it's still valid | |
405 | debugs(88, 3, "handleIMSReply: origin replied 304, revalidating existing entry and sending " << | |
4802f60d | 406 | old_rep->sline.status << " to client"); |
26ac0430 AJ |
407 | sendClientOldEntry(); |
408 | } | |
b297bcd0 | 409 | } |
62e76326 | 410 | |
b297bcd0 HN |
411 | // origin replied with a non-error code |
412 | else if (status > HTTP_STATUS_NONE && status < HTTP_INTERNAL_SERVER_ERROR) { | |
26ac0430 AJ |
413 | // forward response from origin |
414 | http->logType = LOG_TCP_REFRESH_MODIFIED; | |
415 | debugs(88, 3, "handleIMSReply: origin replied " << status << ", replacing existing entry and forwarding to client"); | |
416 | sendClientUpstreamResponse(); | |
b297bcd0 | 417 | } |
62e76326 | 418 | |
b297bcd0 | 419 | // origin replied with an error |
7948b784 AR |
420 | else if (http->request->flags.fail_on_validation_err) { |
421 | http->logType = LOG_TCP_REFRESH_FAIL_ERR; | |
422 | debugs(88, 3, "handleIMSReply: origin replied with error " << status << | |
423 | ", forwarding to client due to fail_on_validation_err"); | |
424 | sendClientUpstreamResponse(); | |
425 | } else { | |
26ac0430 | 426 | // ignore and let client have old entry |
7948b784 | 427 | http->logType = LOG_TCP_REFRESH_FAIL_OLD; |
26ac0430 AJ |
428 | debugs(88, 3, "handleIMSReply: origin replied with error " << |
429 | status << ", sending old entry (" << old_rep->sline.status << ") to client"); | |
430 | sendClientOldEntry(); | |
1d7ab0f4 | 431 | } |
edce4d98 | 432 | } |
433 | ||
e6ccf245 | 434 | extern "C" CSR clientGetMoreData; |
435 | extern "C" CSD clientReplyDetach; | |
edce4d98 | 436 | |
7d5f62a4 AJ |
437 | /** |
438 | * clientReplyContext::cacheHit Should only be called until the HTTP reply headers | |
edce4d98 | 439 | * have been parsed. Normally this should be a single call, but |
440 | * it might take more than one. As soon as we have the headers, | |
0655fa4d | 441 | * we hand off to clientSendMoreData, processExpired, or |
442 | * processMiss. | |
edce4d98 | 443 | */ |
444 | void | |
0655fa4d | 445 | clientReplyContext::CacheHit(void *data, StoreIOBuffer result) |
edce4d98 | 446 | { |
e6ccf245 | 447 | clientReplyContext *context = (clientReplyContext *)data; |
7d5f62a4 | 448 | context->cacheHit(result); |
0655fa4d | 449 | } |
450 | ||
7d5f62a4 AJ |
451 | /** |
452 | * Process a possible cache HIT. | |
453 | */ | |
0655fa4d | 454 | void |
455 | clientReplyContext::cacheHit(StoreIOBuffer result) | |
456 | { | |
7d5f62a4 | 457 | /** Ignore if the HIT object is being deleted. */ |
045a76ab | 458 | if (deleting) |
459 | return; | |
460 | ||
86a2f789 | 461 | StoreEntry *e = http->storeEntry(); |
045a76ab | 462 | |
190154cf | 463 | HttpRequest *r = http->request; |
045a76ab | 464 | |
4a7a3d56 | 465 | debugs(88, 3, "clientCacheHit: " << http->uri << ", " << result.length << " bytes"); |
62e76326 | 466 | |
86a2f789 | 467 | if (http->storeEntry() == NULL) { |
bf8fe701 | 468 | debugs(88, 3, "clientCacheHit: request aborted"); |
62e76326 | 469 | return; |
c8be6d7b | 470 | } else if (result.flags.error) { |
62e76326 | 471 | /* swap in failure */ |
bf8fe701 | 472 | debugs(88, 3, "clientCacheHit: swapin failure for " << http->uri); |
62e76326 | 473 | http->logType = LOG_TCP_SWAPFAIL_MISS; |
86a2f789 | 474 | removeClientStoreReference(&sc, http); |
0655fa4d | 475 | processMiss(); |
62e76326 | 476 | return; |
edce4d98 | 477 | } |
62e76326 | 478 | |
d3b3ab85 | 479 | if (result.length == 0) { |
62e76326 | 480 | /* the store couldn't get enough data from the file for us to id the |
481 | * object | |
482 | */ | |
483 | /* treat as a miss */ | |
484 | http->logType = LOG_TCP_MISS; | |
0655fa4d | 485 | processMiss(); |
62e76326 | 486 | return; |
d3b3ab85 | 487 | } |
62e76326 | 488 | |
edce4d98 | 489 | assert(!EBIT_TEST(e->flags, ENTRY_ABORTED)); |
490 | /* update size of the request */ | |
0655fa4d | 491 | reqsize = result.length + reqofs; |
62e76326 | 492 | |
edce4d98 | 493 | /* |
494 | * Got the headers, now grok them | |
495 | */ | |
29b8d8d6 | 496 | assert(http->logType == LOG_TCP_HIT); |
62e76326 | 497 | |
cdd4e1c1 | 498 | if (strcmp(e->mem_obj->url, urlCanonical(r)) != 0) { |
e0236918 | 499 | debugs(33, DBG_IMPORTANT, "clientProcessHit: URL mismatch, '" << e->mem_obj->url << "' != '" << urlCanonical(r) << "'"); |
cdd4e1c1 | 500 | processMiss(); |
501 | return; | |
502 | } | |
503 | ||
edce4d98 | 504 | switch (varyEvaluateMatch(e, r)) { |
62e76326 | 505 | |
edce4d98 | 506 | case VARY_NONE: |
62e76326 | 507 | /* No variance detected. Continue as normal */ |
508 | break; | |
509 | ||
edce4d98 | 510 | case VARY_MATCH: |
62e76326 | 511 | /* This is the correct entity for this request. Continue */ |
bf8fe701 | 512 | debugs(88, 2, "clientProcessHit: Vary MATCH!"); |
62e76326 | 513 | break; |
514 | ||
edce4d98 | 515 | case VARY_OTHER: |
62e76326 | 516 | /* This is not the correct entity for this request. We need |
517 | * to requery the cache. | |
518 | */ | |
86a2f789 | 519 | removeClientStoreReference(&sc, http); |
62e76326 | 520 | e = NULL; |
521 | /* Note: varyEvalyateMatch updates the request with vary information | |
522 | * so we only get here once. (it also takes care of cancelling loops) | |
523 | */ | |
26ac0430 | 524 | debugs(88, 2, "clientProcessHit: Vary detected!"); |
0655fa4d | 525 | clientGetMoreData(ourNode, http); |
62e76326 | 526 | return; |
527 | ||
edce4d98 | 528 | case VARY_CANCEL: |
62e76326 | 529 | /* varyEvaluateMatch found a object loop. Process as miss */ |
e0236918 | 530 | debugs(88, DBG_IMPORTANT, "clientProcessHit: Vary object loop!"); |
0655fa4d | 531 | processMiss(); |
62e76326 | 532 | return; |
edce4d98 | 533 | } |
62e76326 | 534 | |
edce4d98 | 535 | if (r->method == METHOD_PURGE) { |
86a2f789 | 536 | removeClientStoreReference(&sc, http); |
62e76326 | 537 | e = NULL; |
0655fa4d | 538 | purgeRequest(); |
62e76326 | 539 | return; |
edce4d98 | 540 | } |
62e76326 | 541 | |
3900307b | 542 | if (e->checkNegativeHit() |
626096be | 543 | #if USE_HTTP_VIOLATIONS |
36e6655b | 544 | && !r->flags.nocache_hack |
545 | #endif | |
546 | ) { | |
62e76326 | 547 | http->logType = LOG_TCP_NEGATIVE_HIT; |
0655fa4d | 548 | sendMoreData(result); |
bcfba8bd | 549 | } else if (!http->flags.internal && refreshCheckHTTP(e, r)) { |
bf8fe701 | 550 | debugs(88, 5, "clientCacheHit: in refreshCheck() block"); |
62e76326 | 551 | /* |
552 | * We hold a stale copy; it needs to be validated | |
553 | */ | |
554 | /* | |
555 | * The 'need_validation' flag is used to prevent forwarding | |
556 | * loops between siblings. If our copy of the object is stale, | |
557 | * then we should probably only use parents for the validation | |
558 | * request. Otherwise two siblings could generate a loop if | |
559 | * both have a stale version of the object. | |
560 | */ | |
561 | r->flags.need_validation = 1; | |
562 | ||
563 | if (e->lastmod < 0) { | |
564 | /* | |
565 | * Previous reply didn't have a Last-Modified header, | |
566 | * we cannot revalidate it. | |
567 | */ | |
568 | http->logType = LOG_TCP_MISS; | |
0655fa4d | 569 | processMiss(); |
62e76326 | 570 | } else if (r->flags.nocache) { |
571 | /* | |
572 | * This did not match a refresh pattern that overrides no-cache | |
573 | * we should honour the client no-cache header. | |
574 | */ | |
575 | http->logType = LOG_TCP_CLIENT_REFRESH_MISS; | |
0655fa4d | 576 | processMiss(); |
0c3d3f65 | 577 | } else if (r->protocol == AnyP::PROTO_HTTP) { |
62e76326 | 578 | /* |
579 | * Object needs to be revalidated | |
580 | * XXX This could apply to FTP as well, if Last-Modified is known. | |
581 | */ | |
0655fa4d | 582 | processExpired(); |
62e76326 | 583 | } else { |
584 | /* | |
585 | * We don't know how to re-validate other protocols. Handle | |
586 | * them as if the object has expired. | |
587 | */ | |
588 | http->logType = LOG_TCP_MISS; | |
0655fa4d | 589 | processMiss(); |
62e76326 | 590 | } |
79c8035e AR |
591 | } else if (r->conditional()) |
592 | processConditional(result); | |
593 | else { | |
62e76326 | 594 | /* |
595 | * plain ol' cache hit | |
596 | */ | |
597 | ||
9a0a18de | 598 | #if USE_DELAY_POOLS |
ffdf45f2 | 599 | if (e->store_status != STORE_OK) |
849b826a | 600 | http->logType = LOG_TCP_MISS; |
5bf4d170 | 601 | else |
602 | #endif | |
26ac0430 AJ |
603 | if (e->mem_status == IN_MEMORY) |
604 | http->logType = LOG_TCP_MEM_HIT; | |
605 | else if (Config.onoff.offline) | |
606 | http->logType = LOG_TCP_OFFLINE_HIT; | |
62e76326 | 607 | |
0655fa4d | 608 | sendMoreData(result); |
edce4d98 | 609 | } |
610 | } | |
611 | ||
7d5f62a4 | 612 | /** |
edce4d98 | 613 | * Prepare to fetch the object as it's a cache miss of some kind. |
614 | */ | |
615 | void | |
0655fa4d | 616 | clientReplyContext::processMiss() |
edce4d98 | 617 | { |
edce4d98 | 618 | char *url = http->uri; |
190154cf | 619 | HttpRequest *r = http->request; |
edce4d98 | 620 | ErrorState *err = NULL; |
60745f24 | 621 | debugs(88, 4, "clientProcessMiss: '" << RequestMethodStr(r->method) << " " << url << "'"); |
7d5f62a4 AJ |
622 | |
623 | /** | |
edce4d98 | 624 | * We might have a left-over StoreEntry from a failed cache hit |
625 | * or IMS request. | |
626 | */ | |
86a2f789 | 627 | if (http->storeEntry()) { |
628 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_SPECIAL)) { | |
fa84c01d FC |
629 | debugs(88, DBG_CRITICAL, "clientProcessMiss: miss on a special object (" << url << ")."); |
630 | debugs(88, DBG_CRITICAL, "\tlog_type = " << Format::log_tags[http->logType]); | |
3900307b | 631 | http->storeEntry()->dump(1); |
62e76326 | 632 | } |
633 | ||
86a2f789 | 634 | removeClientStoreReference(&sc, http); |
edce4d98 | 635 | } |
62e76326 | 636 | |
7d5f62a4 | 637 | /** Check if its a PURGE request to be actioned. */ |
edce4d98 | 638 | if (r->method == METHOD_PURGE) { |
0655fa4d | 639 | purgeRequest(); |
62e76326 | 640 | return; |
edce4d98 | 641 | } |
914b89a2 | 642 | |
7d5f62a4 | 643 | /** Check if its an 'OTHER' request. Purge all cached entries if so and continue. */ |
914b89a2 | 644 | if (r->method == METHOD_OTHER) { |
26ac0430 | 645 | purgeAllCached(); |
60745f24 | 646 | } |
62e76326 | 647 | |
7d5f62a4 | 648 | /** Check if 'only-if-cached' flag is set. Action if so. */ |
0655fa4d | 649 | if (http->onlyIfCached()) { |
650 | processOnlyIfCachedMiss(); | |
62e76326 | 651 | return; |
edce4d98 | 652 | } |
62e76326 | 653 | |
ce5a16c2 AR |
654 | /// Deny loops for accelerator and interceptor. TODO: deny in all modes? |
655 | if (r->flags.loopdetect && | |
e1381638 | 656 | (http->flags.accel || http->flags.intercepted)) { |
41ebd397 | 657 | http->al->http.code = HTTP_FORBIDDEN; |
73c36fd9 | 658 | err = clientBuildError(ERR_ACCESS_DENIED, HTTP_FORBIDDEN, NULL, http->getConn()->clientConnection->remote, http->request); |
0655fa4d | 659 | createStoreEntry(r->method, request_flags()); |
86a2f789 | 660 | errorAppendEntry(http->storeEntry(), err); |
0655fa4d | 661 | triggerInitialStoreRead(); |
62e76326 | 662 | return; |
edce4d98 | 663 | } else { |
26ac0430 | 664 | assert(http->out.offset == 0); |
0655fa4d | 665 | createStoreEntry(r->method, r->flags); |
666 | triggerInitialStoreRead(); | |
62e76326 | 667 | |
668 | if (http->redirect.status) { | |
06a5ae20 | 669 | HttpReply *rep = new HttpReply; |
62e76326 | 670 | http->logType = LOG_TCP_REDIRECT; |
d88e3c49 | 671 | http->storeEntry()->releaseRequest(); |
06a5ae20 | 672 | rep->redirect(http->redirect.status, http->redirect.location); |
db237875 | 673 | http->storeEntry()->replaceHttpReply(rep); |
86a2f789 | 674 | http->storeEntry()->complete(); |
62e76326 | 675 | return; |
676 | } | |
677 | ||
7d5f62a4 | 678 | /** Check for internal requests. Update Protocol info if so. */ |
62e76326 | 679 | if (http->flags.internal) |
0c3d3f65 | 680 | r->protocol = AnyP::PROTO_INTERNAL; |
62e76326 | 681 | |
9174ba3d | 682 | assert(r->clientConnectionManager == http->getConn()); |
655daa06 | 683 | |
7d5f62a4 | 684 | /** Start forwarding to get the new object from network */ |
73c36fd9 | 685 | Comm::ConnectionPointer conn = http->getConn() != NULL ? http->getConn()->clientConnection : NULL; |
4bf68cfa | 686 | FwdState::Start(conn, http->storeEntry(), r, http->al); |
edce4d98 | 687 | } |
688 | } | |
689 | ||
7d5f62a4 | 690 | /** |
edce4d98 | 691 | * client issued a request with an only-if-cached cache-control directive; |
692 | * we did not find a cached object that can be returned without | |
693 | * contacting other servers; | |
694 | * respond with a 504 (Gateway Timeout) as suggested in [RFC 2068] | |
695 | */ | |
0655fa4d | 696 | void |
697 | clientReplyContext::processOnlyIfCachedMiss() | |
edce4d98 | 698 | { |
bf8fe701 | 699 | debugs(88, 4, "clientProcessOnlyIfCachedMiss: '" << |
60745f24 | 700 | RequestMethodStr(http->request->method) << " " << http->uri << "'"); |
41ebd397 | 701 | http->al->http.code = HTTP_GATEWAY_TIMEOUT; |
be364179 | 702 | ErrorState *err = clientBuildError(ERR_ONLY_IF_CACHED_MISS, HTTP_GATEWAY_TIMEOUT, NULL, |
73c36fd9 | 703 | http->getConn()->clientConnection->remote, http->request); |
86a2f789 | 704 | removeClientStoreReference(&sc, http); |
0655fa4d | 705 | startError(err); |
edce4d98 | 706 | } |
707 | ||
79c8035e AR |
708 | /// process conditional request from client |
709 | void | |
710 | clientReplyContext::processConditional(StoreIOBuffer &result) | |
711 | { | |
a2bd457d | 712 | StoreEntry *const e = http->storeEntry(); |
79c8035e AR |
713 | |
714 | if (e->getReply()->sline.status != HTTP_OK) { | |
715 | debugs(88, 4, "clientReplyContext::processConditional: Reply code " << | |
716 | e->getReply()->sline.status << " != 200"); | |
717 | http->logType = LOG_TCP_MISS; | |
718 | processMiss(); | |
719 | return; | |
720 | } | |
721 | ||
722 | HttpRequest &r = *http->request; | |
723 | ||
724 | if (r.header.has(HDR_IF_MATCH) && !e->hasIfMatchEtag(r)) { | |
725 | // RFC 2616: reply with 412 Precondition Failed if If-Match did not match | |
726 | sendPreconditionFailedError(); | |
727 | return; | |
728 | } | |
729 | ||
730 | bool matchedIfNoneMatch = false; | |
731 | if (r.header.has(HDR_IF_NONE_MATCH)) { | |
732 | if (!e->hasIfNoneMatchEtag(r)) { | |
733 | // RFC 2616: ignore IMS if If-None-Match did not match | |
734 | r.flags.ims = 0; | |
735 | r.ims = -1; | |
736 | r.imslen = 0; | |
737 | r.header.delById(HDR_IF_MODIFIED_SINCE); | |
738 | http->logType = LOG_TCP_MISS; | |
739 | sendMoreData(result); | |
740 | return; | |
741 | } | |
742 | ||
743 | if (!r.flags.ims) { | |
744 | // RFC 2616: if If-None-Match matched and there is no IMS, | |
a2bd457d AJ |
745 | // reply with 304 Not Modified or 412 Precondition Failed |
746 | sendNotModifiedOrPreconditionFailedError(); | |
79c8035e AR |
747 | return; |
748 | } | |
749 | ||
a2bd457d | 750 | // otherwise check IMS below to decide if we reply with 304 or 412 |
79c8035e AR |
751 | matchedIfNoneMatch = true; |
752 | } | |
753 | ||
754 | if (r.flags.ims) { | |
755 | // handle If-Modified-Since requests from the client | |
756 | if (e->modifiedSince(&r)) { | |
757 | http->logType = LOG_TCP_IMS_HIT; | |
758 | sendMoreData(result); | |
759 | return; | |
760 | } | |
761 | ||
762 | if (matchedIfNoneMatch) { | |
a2bd457d AJ |
763 | // If-None-Match matched, reply with 304 Not Modified or |
764 | // 412 Precondition Failed | |
765 | sendNotModifiedOrPreconditionFailedError(); | |
79c8035e AR |
766 | return; |
767 | } | |
768 | ||
769 | // otherwise reply with 304 Not Modified | |
a2bd457d | 770 | sendNotModified(); |
79c8035e AR |
771 | } |
772 | } | |
773 | ||
edce4d98 | 774 | void |
e6ccf245 | 775 | clientReplyContext::purgeRequestFindObjectToPurge() |
26ac0430 | 776 | { |
e6ccf245 | 777 | /* Try to find a base entry */ |
778 | http->flags.purging = 1; | |
779 | lookingforstore = 1; | |
26ac0430 AJ |
780 | |
781 | // TODO: can we use purgeAllCached() here instead of doing the | |
782 | // getPublicByRequestMethod() dance? | |
3b13a8fd | 783 | StoreEntry::getPublicByRequestMethod(this, http->request, METHOD_GET); |
e6ccf245 | 784 | } |
785 | ||
c1520b67 AJ |
786 | // Purges all entries with a given url |
787 | // TODO: move to SideAgent parent, when we have one | |
60745f24 | 788 | /* |
789 | * We probably cannot purge Vary-affected responses because their MD5 | |
790 | * keys depend on vary headers. | |
791 | */ | |
c1520b67 | 792 | void |
90bd689c | 793 | purgeEntriesByUrl(HttpRequest * req, const char *url) |
c1520b67 | 794 | { |
8dceeee3 BR |
795 | #if USE_HTCP |
796 | bool get_or_head_sent = false; | |
797 | #endif | |
26ac0430 | 798 | |
c1520b67 AJ |
799 | for (HttpRequestMethod m(METHOD_NONE); m != METHOD_ENUM_END; ++m) { |
800 | if (m.isCacheble()) { | |
801 | if (StoreEntry *entry = storeGetPublic(url, m)) { | |
802 | debugs(88, 5, "purging " << RequestMethodStr(m) << ' ' << url); | |
90bd689c | 803 | #if USE_HTCP |
8dceeee3 BR |
804 | neighborsHtcpClear(entry, url, req, m, HTCP_CLR_INVALIDATION); |
805 | if (m == METHOD_GET || m == METHOD_HEAD) { | |
806 | get_or_head_sent = true; | |
807 | } | |
90bd689c | 808 | #endif |
8dceeee3 | 809 | entry->release(); |
c1520b67 AJ |
810 | } |
811 | } | |
812 | } | |
8dceeee3 BR |
813 | |
814 | #if USE_HTCP | |
815 | if (!get_or_head_sent) { | |
816 | neighborsHtcpClear(NULL, url, req, HttpRequestMethod(METHOD_GET), HTCP_CLR_INVALIDATION); | |
817 | } | |
818 | #endif | |
c1520b67 AJ |
819 | } |
820 | ||
26ac0430 | 821 | void |
60745f24 | 822 | clientReplyContext::purgeAllCached() |
823 | { | |
26ac0430 | 824 | const char *url = urlCanonical(http->request); |
90bd689c | 825 | purgeEntriesByUrl(http->request, url); |
35ececa5 | 826 | } |
60745f24 | 827 | |
e6ccf245 | 828 | void |
3b13a8fd | 829 | clientReplyContext::created(StoreEntry *newEntry) |
e6ccf245 | 830 | { |
831 | if (lookingforstore == 1) | |
62e76326 | 832 | purgeFoundGet(newEntry); |
e6ccf245 | 833 | else if (lookingforstore == 2) |
62e76326 | 834 | purgeFoundHead(newEntry); |
e6ccf245 | 835 | else if (lookingforstore == 3) |
62e76326 | 836 | purgeDoPurgeGet(newEntry); |
e6ccf245 | 837 | else if (lookingforstore == 4) |
62e76326 | 838 | purgeDoPurgeHead(newEntry); |
e6ccf245 | 839 | else if (lookingforstore == 5) |
62e76326 | 840 | identifyFoundObject(newEntry); |
e6ccf245 | 841 | } |
842 | ||
843 | void | |
3b13a8fd | 844 | clientReplyContext::purgeFoundGet(StoreEntry *newEntry) |
e6ccf245 | 845 | { |
846 | if (newEntry->isNull()) { | |
62e76326 | 847 | lookingforstore = 2; |
848 | StoreEntry::getPublicByRequestMethod(this, http->request, METHOD_HEAD); | |
e6ccf245 | 849 | } else |
62e76326 | 850 | purgeFoundObject (newEntry); |
e6ccf245 | 851 | } |
852 | ||
853 | void | |
3b13a8fd | 854 | clientReplyContext::purgeFoundHead(StoreEntry *newEntry) |
e6ccf245 | 855 | { |
856 | if (newEntry->isNull()) | |
62e76326 | 857 | purgeDoMissPurge(); |
e6ccf245 | 858 | else |
62e76326 | 859 | purgeFoundObject (newEntry); |
e6ccf245 | 860 | } |
62e76326 | 861 | |
e6ccf245 | 862 | void |
3b13a8fd | 863 | clientReplyContext::purgeFoundObject(StoreEntry *entry) |
e6ccf245 | 864 | { |
865 | assert (entry && !entry->isNull()); | |
e4b9a2f0 | 866 | |
867 | if (EBIT_TEST(entry->flags, ENTRY_SPECIAL)) { | |
868 | http->logType = LOG_TCP_DENIED; | |
be364179 | 869 | ErrorState *err = clientBuildError(ERR_ACCESS_DENIED, HTTP_FORBIDDEN, NULL, |
73c36fd9 | 870 | http->getConn()->clientConnection->remote, http->request); |
e4b9a2f0 | 871 | startError(err); |
872 | return; | |
873 | } | |
874 | ||
8bcf08e0 | 875 | StoreIOBuffer localTempBuffer; |
62e76326 | 876 | /* Swap in the metadata */ |
86a2f789 | 877 | http->storeEntry(entry); |
34266cde | 878 | |
3d0ac046 | 879 | http->storeEntry()->lock(); |
3900307b | 880 | http->storeEntry()->createMemObject(http->uri, http->log_uri); |
34266cde | 881 | |
86a2f789 | 882 | http->storeEntry()->mem_obj->method = http->request->method; |
34266cde | 883 | |
86a2f789 | 884 | sc = storeClientListAdd(http->storeEntry(), this); |
34266cde | 885 | |
62e76326 | 886 | http->logType = LOG_TCP_HIT; |
34266cde | 887 | |
62e76326 | 888 | reqofs = 0; |
34266cde | 889 | |
8bcf08e0 | 890 | localTempBuffer.offset = http->out.offset; |
34266cde | 891 | |
8bcf08e0 | 892 | localTempBuffer.length = next()->readBuffer.length; |
34266cde | 893 | |
8bcf08e0 | 894 | localTempBuffer.data = next()->readBuffer.data; |
34266cde | 895 | |
86a2f789 | 896 | storeClientCopy(sc, http->storeEntry(), |
8bcf08e0 | 897 | localTempBuffer, CacheHit, this); |
e6ccf245 | 898 | } |
899 | ||
900 | void | |
901 | clientReplyContext::purgeRequest() | |
edce4d98 | 902 | { |
bf8fe701 | 903 | debugs(88, 3, "Config2.onoff.enable_purge = " << |
904 | Config2.onoff.enable_purge); | |
62e76326 | 905 | |
edce4d98 | 906 | if (!Config2.onoff.enable_purge) { |
62e76326 | 907 | http->logType = LOG_TCP_DENIED; |
73c36fd9 | 908 | ErrorState *err = clientBuildError(ERR_ACCESS_DENIED, HTTP_FORBIDDEN, NULL, http->getConn()->clientConnection->remote, http->request); |
0655fa4d | 909 | startError(err); |
62e76326 | 910 | return; |
edce4d98 | 911 | } |
62e76326 | 912 | |
edce4d98 | 913 | /* Release both IP cache */ |
cc192b50 | 914 | ipcacheInvalidate(http->request->GetHost()); |
edce4d98 | 915 | |
e6ccf245 | 916 | if (!http->flags.purging) |
62e76326 | 917 | purgeRequestFindObjectToPurge(); |
e6ccf245 | 918 | else |
62e76326 | 919 | purgeDoMissPurge(); |
e6ccf245 | 920 | } |
921 | ||
922 | void | |
923 | clientReplyContext::purgeDoMissPurge() | |
924 | { | |
29b8d8d6 | 925 | http->logType = LOG_TCP_MISS; |
e6ccf245 | 926 | lookingforstore = 3; |
3b13a8fd | 927 | StoreEntry::getPublicByRequestMethod(this,http->request, METHOD_GET); |
e6ccf245 | 928 | } |
929 | ||
930 | void | |
3b13a8fd | 931 | clientReplyContext::purgeDoPurgeGet(StoreEntry *newEntry) |
e6ccf245 | 932 | { |
933 | assert (newEntry); | |
934 | /* Move to new() when that is created */ | |
935 | purgeStatus = HTTP_NOT_FOUND; | |
936 | ||
937 | if (!newEntry->isNull()) { | |
62e76326 | 938 | /* Release the cached URI */ |
bf8fe701 | 939 | debugs(88, 4, "clientPurgeRequest: GET '" << newEntry->url() << "'" ); |
8dceeee3 BR |
940 | #if USE_HTCP |
941 | neighborsHtcpClear(newEntry, NULL, http->request, HttpRequestMethod(METHOD_GET), HTCP_CLR_PURGE); | |
942 | #endif | |
5f33b71d | 943 | newEntry->release(); |
62e76326 | 944 | purgeStatus = HTTP_OK; |
edce4d98 | 945 | } |
62e76326 | 946 | |
e6ccf245 | 947 | lookingforstore = 4; |
3b13a8fd | 948 | StoreEntry::getPublicByRequestMethod(this, http->request, METHOD_HEAD); |
e6ccf245 | 949 | } |
950 | ||
951 | void | |
3b13a8fd | 952 | clientReplyContext::purgeDoPurgeHead(StoreEntry *newEntry) |
e6ccf245 | 953 | { |
4fc0ac76 | 954 | if (newEntry && !newEntry->isNull()) { |
bf8fe701 | 955 | debugs(88, 4, "clientPurgeRequest: HEAD '" << newEntry->url() << "'" ); |
8dceeee3 BR |
956 | #if USE_HTCP |
957 | neighborsHtcpClear(newEntry, NULL, http->request, HttpRequestMethod(METHOD_HEAD), HTCP_CLR_PURGE); | |
958 | #endif | |
5f33b71d | 959 | newEntry->release(); |
62e76326 | 960 | purgeStatus = HTTP_OK; |
edce4d98 | 961 | } |
62e76326 | 962 | |
edce4d98 | 963 | /* And for Vary, release the base URI if none of the headers was included in the request */ |
62e76326 | 964 | |
edce4d98 | 965 | if (http->request->vary_headers |
62e76326 | 966 | && !strstr(http->request->vary_headers, "=")) { |
967 | StoreEntry *entry = storeGetPublic(urlCanonical(http->request), METHOD_GET); | |
968 | ||
969 | if (entry) { | |
bf8fe701 | 970 | debugs(88, 4, "clientPurgeRequest: Vary GET '" << entry->url() << "'" ); |
8dceeee3 BR |
971 | #if USE_HTCP |
972 | neighborsHtcpClear(entry, NULL, http->request, HttpRequestMethod(METHOD_GET), HTCP_CLR_PURGE); | |
973 | #endif | |
5f33b71d | 974 | entry->release(); |
62e76326 | 975 | purgeStatus = HTTP_OK; |
976 | } | |
977 | ||
978 | entry = storeGetPublic(urlCanonical(http->request), METHOD_HEAD); | |
979 | ||
980 | if (entry) { | |
bf8fe701 | 981 | debugs(88, 4, "clientPurgeRequest: Vary HEAD '" << entry->url() << "'" ); |
8dceeee3 BR |
982 | #if USE_HTCP |
983 | neighborsHtcpClear(entry, NULL, http->request, HttpRequestMethod(METHOD_HEAD), HTCP_CLR_PURGE); | |
984 | #endif | |
5f33b71d | 985 | entry->release(); |
62e76326 | 986 | purgeStatus = HTTP_OK; |
987 | } | |
edce4d98 | 988 | } |
62e76326 | 989 | |
edce4d98 | 990 | /* |
991 | * Make a new entry to hold the reply to be written | |
992 | * to the client. | |
993 | */ | |
528b2c61 | 994 | /* FIXME: This doesn't need to go through the store. Simply |
995 | * push down the client chain | |
996 | */ | |
0655fa4d | 997 | createStoreEntry(http->request->method, request_flags()); |
62e76326 | 998 | |
0655fa4d | 999 | triggerInitialStoreRead(); |
62e76326 | 1000 | |
7dc5f514 | 1001 | HttpReply *rep = new HttpReply; |
11992b6f | 1002 | rep->setHeaders(purgeStatus, NULL, NULL, 0, 0, -1); |
7dc5f514 | 1003 | http->storeEntry()->replaceHttpReply(rep); |
86a2f789 | 1004 | http->storeEntry()->complete(); |
edce4d98 | 1005 | } |
1006 | ||
1007 | void | |
0655fa4d | 1008 | clientReplyContext::traceReply(clientStreamNode * node) |
edce4d98 | 1009 | { |
076df709 | 1010 | clientStreamNode *nextNode = (clientStreamNode *)node->node.next->data; |
8bcf08e0 | 1011 | StoreIOBuffer localTempBuffer; |
0655fa4d | 1012 | createStoreEntry(http->request->method, request_flags()); |
076df709 FC |
1013 | localTempBuffer.offset = nextNode->readBuffer.offset + headers_sz; |
1014 | localTempBuffer.length = nextNode->readBuffer.length; | |
1015 | localTempBuffer.data = nextNode->readBuffer.data; | |
86a2f789 | 1016 | storeClientCopy(sc, http->storeEntry(), |
8bcf08e0 | 1017 | localTempBuffer, SendMoreData, this); |
d88e3c49 | 1018 | http->storeEntry()->releaseRequest(); |
3900307b | 1019 | http->storeEntry()->buffer(); |
7dc5f514 | 1020 | HttpReply *rep = new HttpReply; |
11992b6f | 1021 | rep->setHeaders(HTTP_OK, NULL, "text/plain", http->request->prefixLen(), 0, squid_curtime); |
db237875 | 1022 | http->storeEntry()->replaceHttpReply(rep); |
5cafad19 | 1023 | http->request->swapOut(http->storeEntry()); |
86a2f789 | 1024 | http->storeEntry()->complete(); |
edce4d98 | 1025 | } |
1026 | ||
1027 | #define SENDING_BODY 0 | |
1028 | #define SENDING_HDRSONLY 1 | |
1029 | int | |
0655fa4d | 1030 | clientReplyContext::checkTransferDone() |
edce4d98 | 1031 | { |
86a2f789 | 1032 | StoreEntry *entry = http->storeEntry(); |
62e76326 | 1033 | |
edce4d98 | 1034 | if (entry == NULL) |
62e76326 | 1035 | return 0; |
1036 | ||
1037 | /* | |
edce4d98 | 1038 | * For now, 'done_copying' is used for special cases like |
1039 | * Range and HEAD requests. | |
1040 | */ | |
0655fa4d | 1041 | if (http->flags.done_copying) |
62e76326 | 1042 | return 1; |
1043 | ||
4ad60609 AR |
1044 | if (http->request->flags.chunked_reply && !flags.complete) { |
1045 | // last-chunk was not sent | |
1046 | return 0; | |
1047 | } | |
1048 | ||
edce4d98 | 1049 | /* |
1050 | * Handle STORE_OK objects. | |
1051 | * objectLen(entry) will be set proprely. | |
26ac0430 | 1052 | * RC: Does objectLen(entry) include the Headers? |
0e3be1ea | 1053 | * RC: Yes. |
edce4d98 | 1054 | */ |
1055 | if (entry->store_status == STORE_OK) { | |
0655fa4d | 1056 | return storeOKTransferDone(); |
e39b9382 | 1057 | } else { |
0655fa4d | 1058 | return storeNotOKTransferDone(); |
edce4d98 | 1059 | } |
e39b9382 | 1060 | } |
1061 | ||
1062 | int | |
1063 | clientReplyContext::storeOKTransferDone() const | |
1064 | { | |
aa1a691e AR |
1065 | assert(http->storeEntry()->objectLen() >= 0); |
1066 | assert(http->storeEntry()->objectLen() >= headers_sz); | |
47f6e231 | 1067 | if (http->out.offset >= http->storeEntry()->objectLen() - headers_sz) { |
26ac0430 AJ |
1068 | debugs(88,3,HERE << "storeOKTransferDone " << |
1069 | " out.offset=" << http->out.offset << | |
1070 | " objectLen()=" << http->storeEntry()->objectLen() << | |
1071 | " headers_sz=" << headers_sz); | |
62e76326 | 1072 | return 1; |
47f6e231 | 1073 | } |
62e76326 | 1074 | |
e39b9382 | 1075 | return 0; |
1076 | } | |
1077 | ||
1078 | int | |
1079 | clientReplyContext::storeNotOKTransferDone() const | |
1080 | { | |
edce4d98 | 1081 | /* |
1082 | * Now, handle STORE_PENDING objects | |
1083 | */ | |
86a2f789 | 1084 | MemObject *mem = http->storeEntry()->mem_obj; |
edce4d98 | 1085 | assert(mem != NULL); |
1086 | assert(http->request != NULL); | |
0e3be1ea | 1087 | /* mem->reply was wrong because it uses the UPSTREAM header length!!! */ |
8bcf08e0 | 1088 | HttpReply const *curReply = mem->getReply(); |
62e76326 | 1089 | |
e39b9382 | 1090 | if (headers_sz == 0) |
62e76326 | 1091 | /* haven't found end of headers yet */ |
1092 | return 0; | |
e39b9382 | 1093 | |
edce4d98 | 1094 | /* |
1095 | * Figure out how much data we are supposed to send. | |
1096 | * If we are sending a body and we don't have a content-length, | |
1097 | * then we must wait for the object to become STORE_OK. | |
1098 | */ | |
8bcf08e0 | 1099 | if (curReply->content_length < 0) |
62e76326 | 1100 | return 0; |
e39b9382 | 1101 | |
8bcf08e0 | 1102 | int64_t expectedLength = curReply->content_length + http->out.headers_sz; |
62e76326 | 1103 | |
e39b9382 | 1104 | if (http->out.size < expectedLength) |
62e76326 | 1105 | return 0; |
47f6e231 | 1106 | else { |
26ac0430 AJ |
1107 | debugs(88,3,HERE << "storeNotOKTransferDone " << |
1108 | " out.size=" << http->out.size << | |
1109 | " expectedLength=" << expectedLength); | |
62e76326 | 1110 | return 1; |
47f6e231 | 1111 | } |
edce4d98 | 1112 | } |
1113 | ||
1114 | ||
edce4d98 | 1115 | /* A write has completed, what is the next status based on the |
1116 | * canonical request data? | |
1117 | * 1 something is wrong | |
1118 | * 0 nothing is wrong. | |
1119 | * | |
1120 | */ | |
1121 | int | |
59a1efb2 | 1122 | clientHttpRequestStatus(int fd, ClientHttpRequest const *http) |
edce4d98 | 1123 | { |
062f7f4e FC |
1124 | #if SIZEOF_INT64_T == 4 |
1125 | if (http->out.size > 0x7FFF0000) { | |
e0236918 FC |
1126 | debugs(88, DBG_IMPORTANT, "WARNING: closing FD " << fd << " to prevent out.size counter overflow"); |
1127 | debugs(88, DBG_IMPORTANT, "\tclient " << http->getConn()->peer); | |
1128 | debugs(88, DBG_IMPORTANT, "\treceived " << http->out.size << " bytes"); | |
1129 | debugs(88, DBG_IMPORTANT, "\tURI " << http->log_uri); | |
062f7f4e FC |
1130 | return 1; |
1131 | } | |
1132 | ||
1133 | if (http->out.offset > 0x7FFF0000) { | |
e0236918 FC |
1134 | debugs(88, DBG_IMPORTANT, "WARNING: closing FD " << fd < " to prevent out.offset counter overflow"); |
1135 | debugs(88, DBG_IMPORTANT, "\tclient " << http->getConn()->peer); | |
1136 | debugs(88, DBG_IMPORTANT, "\treceived " << http->out.size << " bytes, offset " << http->out.offset); | |
1137 | debugs(88, DBG_IMPORTANT, "\tURI " << http->log_uri); | |
062f7f4e FC |
1138 | return 1; |
1139 | } | |
1140 | ||
1141 | #endif | |
edce4d98 | 1142 | return 0; |
1143 | } | |
1144 | ||
62e76326 | 1145 | /* Preconditions: |
edce4d98 | 1146 | * *http is a valid structure. |
1147 | * fd is either -1, or an open fd. | |
1148 | * | |
1149 | * TODO: enumify this | |
1150 | * | |
1151 | * This function is used by any http request sink, to determine the status | |
1152 | * of the object. | |
1153 | */ | |
1154 | clientStream_status_t | |
59a1efb2 | 1155 | clientReplyStatus(clientStreamNode * aNode, ClientHttpRequest * http) |
edce4d98 | 1156 | { |
0655fa4d | 1157 | clientReplyContext *context = dynamic_cast<clientReplyContext *>(aNode->data.getRaw()); |
1158 | assert (context); | |
1159 | assert (context->http == http); | |
1160 | return context->replyStatus(); | |
1161 | } | |
1162 | ||
1163 | clientStream_status_t | |
1164 | clientReplyContext::replyStatus() | |
1165 | { | |
edce4d98 | 1166 | int done; |
1167 | /* Here because lower nodes don't need it */ | |
62e76326 | 1168 | |
3daaed1a | 1169 | if (http->storeEntry() == NULL) { |
1170 | debugs(88, 5, "clientReplyStatus: no storeEntry"); | |
62e76326 | 1171 | return STREAM_FAILED; /* yuck, but what can we do? */ |
3daaed1a | 1172 | } |
62e76326 | 1173 | |
3daaed1a | 1174 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) { |
62e76326 | 1175 | /* TODO: Could upstream read errors (result.flags.error) be |
1176 | * lost, and result in undersize requests being considered | |
1177 | * complete. Should we tcp reset such connections ? | |
1178 | */ | |
3daaed1a | 1179 | debugs(88, 5, "clientReplyStatus: aborted storeEntry"); |
62e76326 | 1180 | return STREAM_FAILED; |
3daaed1a | 1181 | } |
62e76326 | 1182 | |
0655fa4d | 1183 | if ((done = checkTransferDone()) != 0 || flags.complete) { |
bf8fe701 | 1184 | debugs(88, 5, "clientReplyStatus: transfer is DONE"); |
62e76326 | 1185 | /* Ok we're finished, but how? */ |
1186 | ||
4ad60609 AR |
1187 | const int64_t expectedBodySize = |
1188 | http->storeEntry()->getReply()->bodySize(http->request->method); | |
1189 | if (!http->request->flags.proxy_keepalive && expectedBodySize < 0) { | |
bf8fe701 | 1190 | debugs(88, 5, "clientReplyStatus: closing, content_length < 0"); |
62e76326 | 1191 | return STREAM_FAILED; |
1192 | } | |
1193 | ||
1194 | if (!done) { | |
bf8fe701 | 1195 | debugs(88, 5, "clientReplyStatus: closing, !done, but read 0 bytes"); |
62e76326 | 1196 | return STREAM_FAILED; |
1197 | } | |
1198 | ||
4ad60609 | 1199 | if (expectedBodySize >= 0 && !http->gotEnough()) { |
bf8fe701 | 1200 | debugs(88, 5, "clientReplyStatus: client didn't get all it expected"); |
62e76326 | 1201 | return STREAM_UNPLANNED_COMPLETE; |
1202 | } | |
1203 | ||
1204 | if (http->request->flags.proxy_keepalive) { | |
bf8fe701 | 1205 | debugs(88, 5, "clientReplyStatus: stream complete and can keepalive"); |
62e76326 | 1206 | return STREAM_COMPLETE; |
1207 | } | |
1208 | ||
bf8fe701 | 1209 | debugs(88, 5, "clientReplyStatus: stream was not expected to complete!"); |
62e76326 | 1210 | return STREAM_UNPLANNED_COMPLETE; |
edce4d98 | 1211 | } |
62e76326 | 1212 | |
16611143 | 1213 | // XXX: Should this be checked earlier? We could return above w/o checking. |
1214 | if (reply->receivedBodyTooLarge(*http->request, http->out.offset - 4096)) { | |
b51aec66 | 1215 | /* 4096 is a margin for the HTTP headers included in out.offset */ |
bf8fe701 | 1216 | debugs(88, 5, "clientReplyStatus: client reply body is too large"); |
62e76326 | 1217 | return STREAM_FAILED; |
0e3be1ea | 1218 | } |
62e76326 | 1219 | |
edce4d98 | 1220 | return STREAM_NONE; |
1221 | } | |
1222 | ||
62e76326 | 1223 | /* Responses with no body will not have a content-type header, |
edce4d98 | 1224 | * which breaks the rep_mime_type acl, which |
1225 | * coincidentally, is the most common acl for reply access lists. | |
1226 | * A better long term fix for this is to allow acl matchs on the various | |
26ac0430 AJ |
1227 | * status codes, and then supply a default ruleset that puts these |
1228 | * codes before any user defines access entries. That way the user | |
edce4d98 | 1229 | * can choose to block these responses where appropriate, but won't get |
1230 | * mysterious breakages. | |
1231 | */ | |
0655fa4d | 1232 | bool |
1233 | clientReplyContext::alwaysAllowResponse(http_status sline) const | |
edce4d98 | 1234 | { |
4ef4b952 | 1235 | bool result; |
1236 | ||
edce4d98 | 1237 | switch (sline) { |
62e76326 | 1238 | |
edce4d98 | 1239 | case HTTP_CONTINUE: |
62e76326 | 1240 | |
edce4d98 | 1241 | case HTTP_SWITCHING_PROTOCOLS: |
62e76326 | 1242 | |
edce4d98 | 1243 | case HTTP_PROCESSING: |
62e76326 | 1244 | |
edce4d98 | 1245 | case HTTP_NO_CONTENT: |
62e76326 | 1246 | |
edce4d98 | 1247 | case HTTP_NOT_MODIFIED: |
4ef4b952 | 1248 | result = true; |
62e76326 | 1249 | break; |
1250 | ||
edce4d98 | 1251 | default: |
4ef4b952 | 1252 | result = false; |
edce4d98 | 1253 | } |
4ef4b952 | 1254 | |
1255 | return result; | |
edce4d98 | 1256 | } |
1257 | ||
a5c8d64d AJ |
1258 | /** |
1259 | * Generate the reply headers sent to client. | |
1260 | * | |
1261 | * Filters out unwanted entries and hop-by-hop from original reply header | |
1262 | * then adds extra entries if we have more info than origin server | |
1263 | * then adds Squid specific entries | |
edce4d98 | 1264 | */ |
0655fa4d | 1265 | void |
1266 | clientReplyContext::buildReplyHeader() | |
edce4d98 | 1267 | { |
7dc5f514 | 1268 | HttpHeader *hdr = &reply->header; |
c8be6d7b | 1269 | int is_hit = logTypeIsATcpHit(http->logType); |
190154cf | 1270 | HttpRequest *request = http->request; |
edce4d98 | 1271 | #if DONT_FILTER_THESE |
1272 | /* but you might want to if you run Squid as an HTTP accelerator */ | |
a9925b40 | 1273 | /* hdr->delById(HDR_ACCEPT_RANGES); */ |
1274 | hdr->delById(HDR_ETAG); | |
edce4d98 | 1275 | #endif |
62e76326 | 1276 | |
edce4d98 | 1277 | if (is_hit) |
a9925b40 | 1278 | hdr->delById(HDR_SET_COOKIE); |
f89d4012 | 1279 | // TODO: RFC 2965 : Must honour Cache-Control: no-cache="set-cookie2" and remove header. |
62e76326 | 1280 | |
23c6d7e7 | 1281 | // if there is not configured a peer proxy with login=PASS or login=PASSTHRU option enabled |
dcf3665b | 1282 | // remove the Proxy-Authenticate header |
23c6d7e7 | 1283 | if ( !request->peer_login || (strcmp(request->peer_login,"PASS") != 0 && strcmp(request->peer_login,"PASSTHRU") != 0)) |
26ac0430 | 1284 | reply->header.delById(HDR_PROXY_AUTHENTICATE); |
dcf3665b | 1285 | |
2cdeea82 | 1286 | reply->header.removeHopByHopEntries(); |
62e76326 | 1287 | |
1288 | // if (request->range) | |
7dc5f514 | 1289 | // clientBuildRangeHeader(http, reply); |
a5c8d64d | 1290 | |
edce4d98 | 1291 | /* |
1292 | * Add a estimated Age header on cache hits. | |
1293 | */ | |
1294 | if (is_hit) { | |
62e76326 | 1295 | /* |
1296 | * Remove any existing Age header sent by upstream caches | |
1297 | * (note that the existing header is passed along unmodified | |
1298 | * on cache misses) | |
1299 | */ | |
a9925b40 | 1300 | hdr->delById(HDR_AGE); |
62e76326 | 1301 | /* |
1302 | * This adds the calculated object age. Note that the details of the | |
1303 | * age calculation is performed by adjusting the timestamp in | |
3900307b | 1304 | * StoreEntry::timestampsSet(), not here. |
62e76326 | 1305 | */ |
a5c8d64d AJ |
1306 | #if DEAD_CODE |
1307 | // XXX: realy useless? or is there a bug now that this is detatched from the below if-sequence ? | |
1308 | // looks like this pre-if was supposed to be the browser workaround... | |
86a2f789 | 1309 | if (NULL == http->storeEntry()) |
62e76326 | 1310 | (void) 0; |
86a2f789 | 1311 | else if (http->storeEntry()->timestamp < 0) |
62e76326 | 1312 | (void) 0; |
a5c8d64d | 1313 | #endif |
bbe58ab5 | 1314 | |
1315 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_SPECIAL)) { | |
a9925b40 | 1316 | hdr->delById(HDR_DATE); |
1317 | hdr->insertTime(HDR_DATE, squid_curtime); | |
90fa5816 AJ |
1318 | } else if (http->getConn() && http->getConn()->port->actAsOrigin) { |
1319 | // Swap the Date: header to current time if we are simulating an origin | |
fd49b08b A |
1320 | HttpHeaderEntry *h = hdr->findEntry(HDR_DATE); |
1321 | if (h) | |
1322 | hdr->putExt("X-Origin-Date", h->value.termedBuf()); | |
90fa5816 AJ |
1323 | hdr->delById(HDR_DATE); |
1324 | hdr->insertTime(HDR_DATE, squid_curtime); | |
fd49b08b A |
1325 | h = hdr->findEntry(HDR_EXPIRES); |
1326 | if (h && http->storeEntry()->expires >= 0) { | |
1327 | hdr->putExt("X-Origin-Expires", h->value.termedBuf()); | |
1328 | hdr->delById(HDR_EXPIRES); | |
1329 | hdr->insertTime(HDR_EXPIRES, squid_curtime + http->storeEntry()->expires - http->storeEntry()->timestamp); | |
1330 | } | |
90fa5816 AJ |
1331 | if (http->storeEntry()->timestamp <= squid_curtime) { |
1332 | // put X-Cache-Age: instead of Age: | |
fd49b08b A |
1333 | char age[64]; |
1334 | snprintf(age, sizeof(age), "%ld", (long int) squid_curtime - http->storeEntry()->timestamp); | |
1335 | hdr->putExt("X-Cache-Age", age); | |
1336 | } | |
a81e7089 | 1337 | } else if (http->storeEntry()->timestamp <= squid_curtime) { |
a9925b40 | 1338 | hdr->putInt(HDR_AGE, |
1339 | squid_curtime - http->storeEntry()->timestamp); | |
62e76326 | 1340 | /* Signal old objects. NB: rfc 2616 is not clear, |
1341 | * by implication, on whether we should do this to all | |
1342 | * responses, or only cache hits. | |
1343 | * 14.46 states it ONLY applys for heuristically caclulated | |
1344 | * freshness values, 13.2.4 doesn't specify the same limitation. | |
1345 | * We interpret RFC 2616 under the combination. | |
1346 | */ | |
1347 | /* TODO: if maxage or s-maxage is present, don't do this */ | |
1348 | ||
86a2f789 | 1349 | if (squid_curtime - http->storeEntry()->timestamp >= 86400) { |
8bcf08e0 FC |
1350 | char tbuf[512]; |
1351 | snprintf (tbuf, sizeof(tbuf), "%s %s %s", | |
62e76326 | 1352 | "113", ThisCache, |
1353 | "This cache hit is still fresh and more than 1 day old"); | |
8bcf08e0 | 1354 | hdr->putStr(HDR_WARNING, tbuf); |
62e76326 | 1355 | } |
1356 | } | |
a5c8d64d | 1357 | } |
528b2c61 | 1358 | |
a5c8d64d AJ |
1359 | /* RFC 2616: Section 14.18 |
1360 | * | |
1361 | * Add a Date: header if missing. | |
1362 | * We have access to a clock therefore are required to amend any shortcoming in servers. | |
1363 | * | |
1364 | * NP: done after Age: to prevent ENTRY_SPECIAL double-handling this header. | |
1365 | */ | |
1366 | if ( !hdr->has(HDR_DATE) ) { | |
f0dedeb5 | 1367 | if (!http->storeEntry()) |
a5c8d64d | 1368 | hdr->insertTime(HDR_DATE, squid_curtime); |
f0dedeb5 AJ |
1369 | else if (http->storeEntry()->timestamp > 0) |
1370 | hdr->insertTime(HDR_DATE, http->storeEntry()->timestamp); | |
1371 | else { | |
e78ae89a AJ |
1372 | debugs(88,DBG_IMPORTANT,"WARNING: An error inside Squid has caused an HTTP reply without Date:. Please report this:"); |
1373 | /* dump something useful about the problem */ | |
1374 | http->storeEntry()->dump(DBG_IMPORTANT); | |
f0dedeb5 | 1375 | } |
edce4d98 | 1376 | } |
62e76326 | 1377 | |
bcfba8bd AR |
1378 | // add Warnings required by RFC 2616 if serving a stale hit |
1379 | if (http->request->flags.stale_if_hit && logTypeIsATcpHit(http->logType)) { | |
1380 | hdr->putWarning(110, "Response is stale"); | |
1381 | if (http->request->flags.need_validation) | |
1382 | hdr->putWarning(111, "Revalidation failed"); | |
1383 | } | |
1384 | ||
0bd9aa82 | 1385 | /* Filter unproxyable authentication types */ |
ddd31ed3 | 1386 | if (http->logType != LOG_TCP_DENIED && |
d67acb4e | 1387 | hdr->has(HDR_WWW_AUTHENTICATE)) { |
62e76326 | 1388 | HttpHeaderPos pos = HttpHeaderInitPos; |
1389 | HttpHeaderEntry *e; | |
1390 | ||
26ac0430 | 1391 | int connection_auth_blocked = 0; |
a9925b40 | 1392 | while ((e = hdr->getEntry(&pos))) { |
d67acb4e | 1393 | if (e->id == HDR_WWW_AUTHENTICATE) { |
5b4117d8 | 1394 | const char *value = e->value.rawBuf(); |
62e76326 | 1395 | |
1396 | if ((strncasecmp(value, "NTLM", 4) == 0 && | |
1397 | (value[4] == '\0' || value[4] == ' ')) | |
1398 | || | |
1399 | (strncasecmp(value, "Negotiate", 9) == 0 && | |
d67acb4e | 1400 | (value[9] == '\0' || value[9] == ' ')) |
26ac0430 AJ |
1401 | || |
1402 | (strncasecmp(value, "Kerberos", 8) == 0 && | |
1403 | (value[8] == '\0' || value[8] == ' '))) { | |
1404 | if (request->flags.connection_auth_disabled) { | |
1405 | hdr->delAt(pos, connection_auth_blocked); | |
d67acb4e AJ |
1406 | continue; |
1407 | } | |
26ac0430 AJ |
1408 | request->flags.must_keepalive = 1; |
1409 | if (!request->flags.accelerated && !request->flags.intercepted) { | |
d67acb4e | 1410 | httpHeaderPutStrf(hdr, HDR_PROXY_SUPPORT, "Session-Based-Authentication"); |
26ac0430 AJ |
1411 | /* |
1412 | We send "[Proxy-]Connection: Proxy-Support" header to mark | |
1413 | Proxy-Support as a hop-by-hop header for intermediaries that do not | |
1414 | understand the semantics of this header. The RFC should have included | |
1415 | this recommendation. | |
1416 | */ | |
d67acb4e AJ |
1417 | httpHeaderPutStrf(hdr, HDR_CONNECTION, "Proxy-support"); |
1418 | } | |
1419 | break; | |
26ac0430 | 1420 | } |
62e76326 | 1421 | } |
1422 | } | |
d67acb4e AJ |
1423 | |
1424 | if (connection_auth_blocked) | |
ba9fb01d | 1425 | hdr->refreshMask(); |
0bd9aa82 | 1426 | } |
62e76326 | 1427 | |
2f1431ea | 1428 | #if USE_AUTH |
edce4d98 | 1429 | /* Handle authentication headers */ |
26ac0430 AJ |
1430 | if (http->logType == LOG_TCP_DENIED && |
1431 | ( reply->sline.status == HTTP_PROXY_AUTHENTICATION_REQUIRED || | |
1432 | reply->sline.status == HTTP_UNAUTHORIZED) | |
1433 | ) { | |
1434 | /* Add authentication header */ | |
1435 | /*! \todo alter errorstate to be accel on|off aware. The 0 on the next line | |
1436 | * depends on authenticate behaviour: all schemes to date send no extra | |
1437 | * data on 407/401 responses, and do not check the accel state on 401/407 | |
1438 | * responses | |
1439 | */ | |
1440 | authenticateFixHeader(reply, request->auth_user_request, request, 0, 1); | |
a33a428a AJ |
1441 | } else if (request->auth_user_request != NULL) |
1442 | authenticateFixHeader(reply, request->auth_user_request, request, http->flags.accel, 0); | |
2f1431ea | 1443 | #endif |
62e76326 | 1444 | |
edce4d98 | 1445 | /* Append X-Cache */ |
1446 | httpHeaderPutStrf(hdr, HDR_X_CACHE, "%s from %s", | |
62e76326 | 1447 | is_hit ? "HIT" : "MISS", getMyHostname()); |
1448 | ||
edce4d98 | 1449 | #if USE_CACHE_DIGESTS |
1450 | /* Append X-Cache-Lookup: -- temporary hack, to be removed @?@ @?@ */ | |
1451 | httpHeaderPutStrf(hdr, HDR_X_CACHE_LOOKUP, "%s from %s:%d", | |
0655fa4d | 1452 | lookup_type ? lookup_type : "NONE", |
62e76326 | 1453 | getMyHostname(), getMyPort()); |
1454 | ||
edce4d98 | 1455 | #endif |
62e76326 | 1456 | |
4ad60609 | 1457 | const bool maySendChunkedReply = !request->multipartRangeRequest() && |
f7701e72 | 1458 | reply->sline.protocol == AnyP::PROTO_HTTP && // response is HTTP |
4cb2536f | 1459 | (request->http_ver >= HttpVersion(1, 1)); |
4ad60609 | 1460 | |
f529bb20 | 1461 | /* Check whether we should send keep-alive */ |
58850d15 | 1462 | if (!Config.onoff.error_pconns && reply->sline.status >= 400 && !request->flags.must_keepalive) { |
bf8fe701 | 1463 | debugs(33, 3, "clientBuildReplyHeader: Error, don't keep-alive"); |
58850d15 | 1464 | request->flags.proxy_keepalive = 0; |
af6a12ee | 1465 | } else if (!Config.onoff.client_pconns && !request->flags.must_keepalive) { |
17b57873 | 1466 | debugs(33, 2, "clientBuildReplyHeader: Connection Keep-Alive not requested by admin or client"); |
f5e45ad8 | 1467 | request->flags.proxy_keepalive = 0; |
af6a12ee | 1468 | } else if (request->flags.proxy_keepalive && shutting_down) { |
f529bb20 | 1469 | debugs(88, 3, "clientBuildReplyHeader: Shutting down, don't keep-alive."); |
1470 | request->flags.proxy_keepalive = 0; | |
af6a12ee | 1471 | } else if (request->flags.connection_auth && !reply->keep_alive) { |
26ac0430 AJ |
1472 | debugs(33, 2, "clientBuildReplyHeader: Connection oriented auth but server side non-persistent"); |
1473 | request->flags.proxy_keepalive = 0; | |
4ad60609 | 1474 | } else if (reply->bodySize(request->method) < 0 && !maySendChunkedReply) { |
17b57873 AJ |
1475 | debugs(88, 3, "clientBuildReplyHeader: can't keep-alive, unknown body size" ); |
1476 | request->flags.proxy_keepalive = 0; | |
af6a12ee | 1477 | } else if (fdUsageHigh()&& !request->flags.must_keepalive) { |
17b57873 AJ |
1478 | debugs(88, 3, "clientBuildReplyHeader: Not many unused FDs, can't keep-alive"); |
1479 | request->flags.proxy_keepalive = 0; | |
49f1c7f7 AR |
1480 | } else if (request->flags.sslBumped && !reply->persistent()) { |
1481 | // We do not really have to close, but we pretend we are a tunnel. | |
1482 | debugs(88, 3, "clientBuildReplyHeader: bumped reply forces close"); | |
1483 | request->flags.proxy_keepalive = 0; | |
17b57873 | 1484 | } |
d67acb4e | 1485 | |
4ad60609 AR |
1486 | // Decide if we send chunked reply |
1487 | if (maySendChunkedReply && | |
4cb2536f A |
1488 | request->flags.proxy_keepalive && |
1489 | reply->bodySize(request->method) < 0) { | |
4ad60609 AR |
1490 | debugs(88, 3, "clientBuildReplyHeader: chunked reply"); |
1491 | request->flags.chunked_reply = 1; | |
1492 | hdr->putStr(HDR_TRANSFER_ENCODING, "chunked"); | |
1493 | } | |
f529bb20 | 1494 | |
4dea3fdd | 1495 | /* Append VIA */ |
92caea77 | 1496 | if (Config.onoff.via) { |
62e76326 | 1497 | LOCAL_ARRAY(char, bbuf, MAX_URL + 32); |
30abd221 | 1498 | String strVia; |
26ac0430 | 1499 | hdr->getList(HDR_VIA, &strVia); |
88331887 | 1500 | snprintf(bbuf, MAX_URL + 32, "%d.%d %s", |
7dc5f514 | 1501 | reply->sline.version.major, |
1502 | reply->sline.version.minor, | |
62e76326 | 1503 | ThisCache); |
1504 | strListAdd(&strVia, bbuf, ','); | |
a9925b40 | 1505 | hdr->delById(HDR_VIA); |
5b4117d8 | 1506 | hdr->putStr(HDR_VIA, strVia.termedBuf()); |
c8be6d7b | 1507 | } |
95e78500 AJ |
1508 | /* Signal keep-alive or close explicitly */ |
1509 | hdr->putStr(HDR_CONNECTION, request->flags.proxy_keepalive ? "keep-alive" : "close"); | |
62e76326 | 1510 | |
edce4d98 | 1511 | #if ADD_X_REQUEST_URI |
1512 | /* | |
1513 | * Knowing the URI of the request is useful when debugging persistent | |
1514 | * connections in a client; we cannot guarantee the order of http headers, | |
1515 | * but X-Request-URI is likely to be the very last header to ease use from a | |
1516 | * debugger [hdr->entries.count-1]. | |
1517 | */ | |
a9925b40 | 1518 | hdr->putStr(HDR_X_REQUEST_URI, |
1519 | http->memOjbect()->url ? http->memObject()->url : http->uri); | |
62e76326 | 1520 | |
edce4d98 | 1521 | #endif |
62e76326 | 1522 | |
45cca89d AJ |
1523 | /* Surrogate-Control requires Surrogate-Capability from upstream to pass on */ |
1524 | if ( hdr->has(HDR_SURROGATE_CONTROL) ) { | |
1525 | if (!request->header.has(HDR_SURROGATE_CAPABILITY)) { | |
1526 | hdr->delById(HDR_SURROGATE_CONTROL); | |
1527 | } | |
1528 | /* TODO: else case: drop any controls intended specifically for our surrogate ID */ | |
1529 | } | |
1530 | ||
8c01ada0 | 1531 | httpHdrMangleList(hdr, request, ROR_REPLY); |
edce4d98 | 1532 | } |
1533 | ||
1534 | ||
0655fa4d | 1535 | void |
b297bcd0 | 1536 | clientReplyContext::cloneReply() |
edce4d98 | 1537 | { |
7dc5f514 | 1538 | assert(reply == NULL); |
0655fa4d | 1539 | |
b297bcd0 | 1540 | HttpReply *rep = http->storeEntry()->getReply()->clone(); |
7dc5f514 | 1541 | |
1542 | reply = HTTPMSGLOCK(rep); | |
1543 | ||
0c3d3f65 | 1544 | if (reply->sline.protocol == AnyP::PROTO_HTTP) { |
871c031f AJ |
1545 | /* RFC 2616 requires us to advertise our 1.1 version (but only on real HTTP traffic) */ |
1546 | reply->sline.version = HttpVersion(1,1); | |
e77d7ef0 | 1547 | } |
0655fa4d | 1548 | |
1549 | /* do header conversions */ | |
1550 | buildReplyHeader(); | |
edce4d98 | 1551 | } |
1552 | ||
e6ccf245 | 1553 | void |
1554 | clientReplyContext::identifyStoreObject() | |
edce4d98 | 1555 | { |
190154cf | 1556 | HttpRequest *r = http->request; |
62e76326 | 1557 | |
e6ccf245 | 1558 | if (r->flags.cachable || r->flags.internal) { |
62e76326 | 1559 | lookingforstore = 5; |
1560 | StoreEntry::getPublicByRequest (this, r); | |
559da936 | 1561 | } else { |
62e76326 | 1562 | identifyFoundObject (NullStoreEntry::getInstance()); |
559da936 | 1563 | } |
e6ccf245 | 1564 | } |
1565 | ||
7d5f62a4 AJ |
1566 | /** |
1567 | * Check state of the current StoreEntry object. | |
1568 | * to see if we can determine the final status of the request. | |
1569 | */ | |
e6ccf245 | 1570 | void |
1571 | clientReplyContext::identifyFoundObject(StoreEntry *newEntry) | |
1572 | { | |
1573 | StoreEntry *e = newEntry; | |
190154cf | 1574 | HttpRequest *r = http->request; |
62e76326 | 1575 | |
d85b8894 | 1576 | /** \li If the entry received isNull() then we ignore it. */ |
e6ccf245 | 1577 | if (e->isNull()) { |
86a2f789 | 1578 | http->storeEntry(NULL); |
e6ccf245 | 1579 | } else { |
86a2f789 | 1580 | http->storeEntry(e); |
e6ccf245 | 1581 | } |
62e76326 | 1582 | |
86a2f789 | 1583 | e = http->storeEntry(); |
a12a049a | 1584 | |
7d5f62a4 | 1585 | /* Release IP-cache entries on reload */ |
d85b8894 | 1586 | /** \li If the request has no-cache flag set or some no_cache HACK in operation we |
7d5f62a4 AJ |
1587 | * 'invalidate' the cached IP entries for this request ??? |
1588 | */ | |
a12a049a | 1589 | if (r->flags.nocache) { |
1590 | ||
f64091a7 | 1591 | #if USE_DNSHELPER |
cc192b50 | 1592 | ipcacheInvalidate(r->GetHost()); |
a12a049a | 1593 | #else |
cc192b50 | 1594 | ipcacheInvalidateNegative(r->GetHost()); |
f64091a7 | 1595 | #endif /* USE_DNSHELPER */ |
a12a049a | 1596 | |
1597 | } | |
1598 | ||
626096be | 1599 | #if USE_HTTP_VIOLATIONS |
62e76326 | 1600 | |
a12a049a | 1601 | else if (r->flags.nocache_hack) { |
1602 | ||
f64091a7 | 1603 | #if USE_DNSHELPER |
cc192b50 | 1604 | ipcacheInvalidate(r->GetHost()); |
a12a049a | 1605 | #else |
cc192b50 | 1606 | ipcacheInvalidateNegative(r->GetHost()); |
f64091a7 | 1607 | #endif /* USE_DNSHELPER */ |
a12a049a | 1608 | |
1609 | } | |
1610 | ||
626096be | 1611 | #endif /* USE_HTTP_VIOLATIONS */ |
edce4d98 | 1612 | #if USE_CACHE_DIGESTS |
62e76326 | 1613 | |
86a2f789 | 1614 | lookup_type = http->storeEntry() ? "HIT" : "MISS"; |
62e76326 | 1615 | |
edce4d98 | 1616 | #endif |
62e76326 | 1617 | |
86a2f789 | 1618 | if (NULL == http->storeEntry()) { |
d85b8894 | 1619 | /** \li If no StoreEntry object is current assume this object isn't in the cache set MISS*/ |
7d5f62a4 | 1620 | debugs(85, 3, "clientProcessRequest2: StoreEntry is NULL - MISS"); |
62e76326 | 1621 | http->logType = LOG_TCP_MISS; |
1622 | doGetMoreData(); | |
1623 | return; | |
edce4d98 | 1624 | } |
62e76326 | 1625 | |
edce4d98 | 1626 | if (Config.onoff.offline) { |
d85b8894 | 1627 | /** \li If we are running in offline mode set to HIT */ |
bf8fe701 | 1628 | debugs(85, 3, "clientProcessRequest2: offline HIT"); |
62e76326 | 1629 | http->logType = LOG_TCP_HIT; |
1630 | doGetMoreData(); | |
1631 | return; | |
edce4d98 | 1632 | } |
62e76326 | 1633 | |
edce4d98 | 1634 | if (http->redirect.status) { |
d85b8894 | 1635 | /** \li If redirection status is True force this to be a MISS */ |
16cd3193 | 1636 | debugs(85, 3, HERE << "REDIRECT status forced StoreEntry to NULL (no body on 3XX responses)"); |
86a2f789 | 1637 | http->storeEntry(NULL); |
16cd3193 | 1638 | http->logType = LOG_TCP_REDIRECT; |
62e76326 | 1639 | doGetMoreData(); |
1640 | return; | |
edce4d98 | 1641 | } |
62e76326 | 1642 | |
3900307b | 1643 | if (!e->validToSend()) { |
bf8fe701 | 1644 | debugs(85, 3, "clientProcessRequest2: !storeEntryValidToSend MISS" ); |
86a2f789 | 1645 | http->storeEntry(NULL); |
62e76326 | 1646 | http->logType = LOG_TCP_MISS; |
1647 | doGetMoreData(); | |
1648 | return; | |
edce4d98 | 1649 | } |
62e76326 | 1650 | |
edce4d98 | 1651 | if (EBIT_TEST(e->flags, ENTRY_SPECIAL)) { |
d85b8894 | 1652 | /* \li Special entries are always hits, no matter what the client says */ |
bf8fe701 | 1653 | debugs(85, 3, "clientProcessRequest2: ENTRY_SPECIAL HIT"); |
62e76326 | 1654 | http->logType = LOG_TCP_HIT; |
1655 | doGetMoreData(); | |
1656 | return; | |
edce4d98 | 1657 | } |
62e76326 | 1658 | |
edce4d98 | 1659 | if (r->flags.nocache) { |
bf8fe701 | 1660 | debugs(85, 3, "clientProcessRequest2: no-cache REFRESH MISS"); |
86a2f789 | 1661 | http->storeEntry(NULL); |
62e76326 | 1662 | http->logType = LOG_TCP_CLIENT_REFRESH_MISS; |
1663 | doGetMoreData(); | |
1664 | return; | |
edce4d98 | 1665 | } |
62e76326 | 1666 | |
bf8fe701 | 1667 | debugs(85, 3, "clientProcessRequest2: default HIT"); |
e6ccf245 | 1668 | http->logType = LOG_TCP_HIT; |
1669 | doGetMoreData(); | |
edce4d98 | 1670 | } |
1671 | ||
d85b8894 AJ |
1672 | /** |
1673 | * Request more data from the store for the client Stream | |
edce4d98 | 1674 | * This is *the* entry point to this module. |
1675 | * | |
1676 | * Preconditions: | |
d85b8894 AJ |
1677 | * - This is the head of the list. |
1678 | * - There is at least one more node. | |
1679 | * - Data context is not null | |
edce4d98 | 1680 | */ |
1681 | void | |
59a1efb2 | 1682 | clientGetMoreData(clientStreamNode * aNode, ClientHttpRequest * http) |
edce4d98 | 1683 | { |
edce4d98 | 1684 | /* Test preconditions */ |
e6ccf245 | 1685 | assert(aNode != NULL); |
1686 | assert(cbdataReferenceValid(aNode)); | |
e6ccf245 | 1687 | assert(aNode->node.prev == NULL); |
1688 | assert(aNode->node.next != NULL); | |
0655fa4d | 1689 | clientReplyContext *context = dynamic_cast<clientReplyContext *>(aNode->data.getRaw()); |
1690 | assert (context); | |
edce4d98 | 1691 | assert(context->http == http); |
1692 | ||
559da936 | 1693 | |
0655fa4d | 1694 | clientStreamNode *next = ( clientStreamNode *)aNode->node.next->data; |
62e76326 | 1695 | |
edce4d98 | 1696 | if (!context->ourNode) |
62e76326 | 1697 | context->ourNode = aNode; |
1698 | ||
e6ccf245 | 1699 | /* no cbdatareference, this is only used once, and safely */ |
edce4d98 | 1700 | if (context->flags.storelogiccomplete) { |
62e76326 | 1701 | StoreIOBuffer tempBuffer; |
1702 | tempBuffer.offset = next->readBuffer.offset + context->headers_sz; | |
1703 | tempBuffer.length = next->readBuffer.length; | |
1704 | tempBuffer.data = next->readBuffer.data; | |
1705 | ||
86a2f789 | 1706 | storeClientCopy(context->sc, http->storeEntry(), |
0655fa4d | 1707 | tempBuffer, clientReplyContext::SendMoreData, context); |
62e76326 | 1708 | return; |
edce4d98 | 1709 | } |
62e76326 | 1710 | |
edce4d98 | 1711 | if (context->http->request->method == METHOD_PURGE) { |
62e76326 | 1712 | context->purgeRequest(); |
1713 | return; | |
edce4d98 | 1714 | } |
62e76326 | 1715 | |
e18b8316 | 1716 | // OPTIONS with Max-Forwards:0 handled in clientProcessRequest() |
fc90edc3 | 1717 | |
edce4d98 | 1718 | if (context->http->request->method == METHOD_TRACE) { |
34ee6e73 | 1719 | if (context->http->request->header.getInt64(HDR_MAX_FORWARDS) == 0) { |
0655fa4d | 1720 | context->traceReply(aNode); |
62e76326 | 1721 | return; |
1722 | } | |
1723 | ||
1724 | /* continue forwarding, not finished yet. */ | |
1725 | http->logType = LOG_TCP_MISS; | |
1726 | ||
1727 | context->doGetMoreData(); | |
edce4d98 | 1728 | } else |
62e76326 | 1729 | context->identifyStoreObject(); |
e6ccf245 | 1730 | } |
1731 | ||
1732 | void | |
1733 | clientReplyContext::doGetMoreData() | |
1734 | { | |
edce4d98 | 1735 | /* We still have to do store logic processing - vary, cache hit etc */ |
86a2f789 | 1736 | if (http->storeEntry() != NULL) { |
62e76326 | 1737 | /* someone found the object in the cache for us */ |
8bcf08e0 | 1738 | StoreIOBuffer localTempBuffer; |
34266cde | 1739 | |
3d0ac046 | 1740 | http->storeEntry()->lock(); |
62e76326 | 1741 | |
86a2f789 | 1742 | if (http->storeEntry()->mem_obj == NULL) { |
62e76326 | 1743 | /* |
1744 | * This if-block exists because we don't want to clobber | |
1745 | * a preexiting mem_obj->method value if the mem_obj | |
1746 | * already exists. For example, when a HEAD request | |
1747 | * is a cache hit for a GET response, we want to keep | |
1748 | * the method as GET. | |
1749 | */ | |
3900307b | 1750 | http->storeEntry()->createMemObject(http->uri, http->log_uri); |
7d5f62a4 | 1751 | http->storeEntry()->mem_obj->method = http->request->method; |
62e76326 | 1752 | } |
1753 | ||
86a2f789 | 1754 | sc = storeClientListAdd(http->storeEntry(), this); |
9a0a18de | 1755 | #if USE_DELAY_POOLS |
62e76326 | 1756 | sc->setDelayId(DelayId::DelayClient(http)); |
edce4d98 | 1757 | #endif |
62e76326 | 1758 | |
1759 | assert(http->logType == LOG_TCP_HIT); | |
1760 | reqofs = 0; | |
1761 | /* guarantee nothing has been sent yet! */ | |
1762 | assert(http->out.size == 0); | |
1763 | assert(http->out.offset == 0); | |
425de4c8 AJ |
1764 | |
1765 | if (Ip::Qos::TheConfig.isHitTosActive()) { | |
73c36fd9 | 1766 | Ip::Qos::doTosLocalHit(http->getConn()->clientConnection); |
425de4c8 AJ |
1767 | } |
1768 | ||
1769 | if (Ip::Qos::TheConfig.isHitNfmarkActive()) { | |
73c36fd9 | 1770 | Ip::Qos::doNfmarkLocalHit(http->getConn()->clientConnection); |
b86ab75b | 1771 | } |
425de4c8 | 1772 | |
8bcf08e0 FC |
1773 | localTempBuffer.offset = reqofs; |
1774 | localTempBuffer.length = getNextNode()->readBuffer.length; | |
1775 | localTempBuffer.data = getNextNode()->readBuffer.data; | |
1776 | storeClientCopy(sc, http->storeEntry(), localTempBuffer, CacheHit, this); | |
edce4d98 | 1777 | } else { |
62e76326 | 1778 | /* MISS CASE, http->logType is already set! */ |
0655fa4d | 1779 | processMiss(); |
edce4d98 | 1780 | } |
1781 | } | |
1782 | ||
d85b8894 | 1783 | /** The next node has removed itself from the stream. */ |
edce4d98 | 1784 | void |
59a1efb2 | 1785 | clientReplyDetach(clientStreamNode * node, ClientHttpRequest * http) |
edce4d98 | 1786 | { |
d85b8894 | 1787 | /** detach from the stream */ |
edce4d98 | 1788 | clientStreamDetach(node, http); |
1789 | } | |
1790 | ||
d85b8894 AJ |
1791 | /** |
1792 | * Accepts chunk of a http message in buf, parses prefix, filters headers and | |
edce4d98 | 1793 | * such, writes processed message to the message recipient |
1794 | */ | |
1795 | void | |
0655fa4d | 1796 | clientReplyContext::SendMoreData(void *data, StoreIOBuffer result) |
edce4d98 | 1797 | { |
e6ccf245 | 1798 | clientReplyContext *context = static_cast<clientReplyContext *>(data); |
528b2c61 | 1799 | context->sendMoreData (result); |
1800 | } | |
1801 | ||
1802 | void | |
1803 | clientReplyContext::makeThisHead() | |
1804 | { | |
1805 | /* At least, I think thats what this does */ | |
1806 | dlinkDelete(&http->active, &ClientActiveRequests); | |
1807 | dlinkAdd(http, &http->active, &ClientActiveRequests); | |
1808 | } | |
1809 | ||
1810 | bool | |
1811 | clientReplyContext::errorInStream(StoreIOBuffer const &result, size_t const &sizeToProcess)const | |
1812 | { | |
1813 | return /* aborted request */ | |
86a2f789 | 1814 | (http->storeEntry() && EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) || |
62e76326 | 1815 | /* Upstream read error */ (result.flags.error) || |
1816 | /* Upstream EOF */ (sizeToProcess == 0); | |
528b2c61 | 1817 | } |
1818 | ||
1819 | void | |
1820 | clientReplyContext::sendStreamError(StoreIOBuffer const &result) | |
1821 | { | |
d85b8894 | 1822 | /** call clientWriteComplete so the client socket gets closed |
af6a12ee | 1823 | * |
d85b8894 | 1824 | * We call into the stream, because we don't know that there is a |
528b2c61 | 1825 | * client socket! |
1826 | */ | |
26ac0430 | 1827 | debugs(88, 5, "clientReplyContext::sendStreamError: A stream error has occured, marking as complete and sending no data."); |
8bcf08e0 | 1828 | StoreIOBuffer localTempBuffer; |
528b2c61 | 1829 | flags.complete = 1; |
4ad60609 | 1830 | http->request->flags.stream_error = 1; |
8bcf08e0 | 1831 | localTempBuffer.flags.error = result.flags.error; |
528b2c61 | 1832 | clientStreamCallback((clientStreamNode*)http->client_stream.head->data, http, NULL, |
8bcf08e0 | 1833 | localTempBuffer); |
528b2c61 | 1834 | } |
1835 | ||
1836 | void | |
1837 | clientReplyContext::pushStreamData(StoreIOBuffer const &result, char *source) | |
1838 | { | |
8bcf08e0 | 1839 | StoreIOBuffer localTempBuffer; |
62e76326 | 1840 | |
528b2c61 | 1841 | if (result.length == 0) { |
bf8fe701 | 1842 | debugs(88, 5, "clientReplyContext::pushStreamData: marking request as complete due to 0 length store result"); |
62e76326 | 1843 | flags.complete = 1; |
528b2c61 | 1844 | } |
62e76326 | 1845 | |
43ae1d95 | 1846 | assert(result.offset - headers_sz == next()->readBuffer.offset); |
8bcf08e0 FC |
1847 | localTempBuffer.offset = result.offset - headers_sz; |
1848 | localTempBuffer.length = result.length; | |
62e76326 | 1849 | |
8bcf08e0 FC |
1850 | if (localTempBuffer.length) |
1851 | localTempBuffer.data = source; | |
62e76326 | 1852 | |
528b2c61 | 1853 | clientStreamCallback((clientStreamNode*)http->client_stream.head->data, http, NULL, |
8bcf08e0 | 1854 | localTempBuffer); |
528b2c61 | 1855 | } |
1856 | ||
1857 | clientStreamNode * | |
1858 | clientReplyContext::next() const | |
1859 | { | |
1860 | assert ( (clientStreamNode*)http->client_stream.head->next->data == getNextNode()); | |
1861 | return getNextNode(); | |
1862 | } | |
1863 | ||
b51aec66 | 1864 | void |
16611143 | 1865 | clientReplyContext::sendBodyTooLargeError() |
b51aec66 | 1866 | { |
b7ac5457 | 1867 | Ip::Address tmp_noaddr; |
26ac0430 | 1868 | tmp_noaddr.SetNoAddr(); // TODO: make a global const |
af0d9bca | 1869 | http->logType = LOG_TCP_DENIED_REPLY; |
16611143 | 1870 | ErrorState *err = clientBuildError(ERR_TOO_BIG, HTTP_FORBIDDEN, NULL, |
73c36fd9 | 1871 | http->getConn() != NULL ? http->getConn()->clientConnection->remote : tmp_noaddr, |
26ac0430 | 1872 | http->request); |
16611143 | 1873 | removeClientStoreReference(&(sc), http); |
1874 | HTTPMSGUNLOCK(reply); | |
1875 | startError(err); | |
26ac0430 | 1876 | |
b51aec66 | 1877 | } |
1878 | ||
79c8035e AR |
1879 | /// send 412 (Precondition Failed) to client |
1880 | void | |
1881 | clientReplyContext::sendPreconditionFailedError() | |
1882 | { | |
1883 | http->logType = LOG_TCP_HIT; | |
1884 | ErrorState *const err = | |
1885 | clientBuildError(ERR_PRECONDITION_FAILED, HTTP_PRECONDITION_FAILED, | |
73c36fd9 | 1886 | NULL, http->getConn()->clientConnection->remote, http->request); |
79c8035e AR |
1887 | removeClientStoreReference(&sc, http); |
1888 | HTTPMSGUNLOCK(reply); | |
1889 | startError(err); | |
1890 | } | |
1891 | ||
a2bd457d AJ |
1892 | /// send 304 (Not Modified) to client |
1893 | void | |
1894 | clientReplyContext::sendNotModified() | |
1895 | { | |
1896 | StoreEntry *e = http->storeEntry(); | |
1897 | const time_t timestamp = e->timestamp; | |
1898 | HttpReply *const temprep = e->getReply()->make304(); | |
1899 | http->logType = LOG_TCP_IMS_HIT; | |
1900 | removeClientStoreReference(&sc, http); | |
1901 | createStoreEntry(http->request->method, request_flags()); | |
1902 | e = http->storeEntry(); | |
1903 | // Copy timestamp from the original entry so the 304 | |
1904 | // reply has a meaningful Age: header. | |
90fa5816 | 1905 | e->timestampsSet(); |
a2bd457d AJ |
1906 | e->timestamp = timestamp; |
1907 | e->replaceHttpReply(temprep); | |
1908 | e->complete(); | |
1909 | /* | |
1910 | * TODO: why put this in the store and then serialise it and | |
1911 | * then parse it again. Simply mark the request complete in | |
1912 | * our context and write the reply struct to the client side. | |
1913 | */ | |
1914 | triggerInitialStoreRead(); | |
1915 | } | |
1916 | ||
1917 | /// send 304 (Not Modified) or 412 (Precondition Failed) to client | |
1918 | /// depending on request method | |
1919 | void | |
1920 | clientReplyContext::sendNotModifiedOrPreconditionFailedError() | |
1921 | { | |
1922 | if (http->request->method == METHOD_GET || | |
a4be71b2 | 1923 | http->request->method == METHOD_HEAD) |
a2bd457d AJ |
1924 | sendNotModified(); |
1925 | else | |
1926 | sendPreconditionFailedError(); | |
1927 | } | |
1928 | ||
4993f571 | 1929 | void |
1930 | clientReplyContext::processReplyAccess () | |
1931 | { | |
b50e327b | 1932 | /* NP: this should probably soft-fail to a zero-sized-reply error ?? */ |
7dc5f514 | 1933 | assert(reply); |
b50e327b AJ |
1934 | |
1935 | /** Don't block our own responses or HTTP status messages */ | |
16611143 | 1936 | if (http->logType == LOG_TCP_DENIED || |
26ac0430 AJ |
1937 | http->logType == LOG_TCP_DENIED_REPLY || |
1938 | alwaysAllowResponse(reply->sline.status)) { | |
acbf9428 | 1939 | headers_sz = reply->hdr_sz; |
2efeb0b7 | 1940 | processReplyAccessResult(ACCESS_ALLOWED); |
26ac0430 | 1941 | return; |
230a8cc6 | 1942 | } |
26ac0430 | 1943 | |
b50e327b | 1944 | /** Check for reply to big error */ |
16611143 | 1945 | if (reply->expectedBodyTooLarge(*http->request)) { |
1946 | sendBodyTooLargeError(); | |
62e76326 | 1947 | return; |
1948 | } | |
1949 | ||
7dc5f514 | 1950 | headers_sz = reply->hdr_sz; |
230a8cc6 | 1951 | |
b50e327b | 1952 | /** check for absent access controls (permit by default) */ |
230a8cc6 | 1953 | if (!Config.accessList.reply) { |
2efeb0b7 | 1954 | processReplyAccessResult(ACCESS_ALLOWED); |
26ac0430 | 1955 | return; |
230a8cc6 | 1956 | } |
1957 | ||
b50e327b | 1958 | /** Process http_reply_access lists */ |
127dce76 AR |
1959 | ACLFilledChecklist *replyChecklist = |
1960 | clientAclChecklistCreate(Config.accessList.reply, http); | |
7dc5f514 | 1961 | replyChecklist->reply = HTTPMSGLOCK(reply); |
0655fa4d | 1962 | replyChecklist->nonBlockingCheck(ProcessReplyAccessResult, this); |
4993f571 | 1963 | } |
1964 | ||
1965 | void | |
2efeb0b7 | 1966 | clientReplyContext::ProcessReplyAccessResult(allow_t rv, void *voidMe) |
4993f571 | 1967 | { |
1968 | clientReplyContext *me = static_cast<clientReplyContext *>(voidMe); | |
0655fa4d | 1969 | me->processReplyAccessResult(rv); |
4993f571 | 1970 | } |
1971 | ||
1972 | void | |
2efeb0b7 | 1973 | clientReplyContext::processReplyAccessResult(const allow_t &accessAllowed) |
4993f571 | 1974 | { |
26ac0430 | 1975 | debugs(88, 2, "The reply for " << RequestMethodStr(http->request->method) |
2efeb0b7 | 1976 | << " " << http->uri << " is " << accessAllowed << ", because it matched '" |
bf8fe701 | 1977 | << (AclMatchedName ? AclMatchedName : "NO ACL's") << "'" ); |
62e76326 | 1978 | |
2efeb0b7 | 1979 | if (accessAllowed != ACCESS_ALLOWED) { |
62e76326 | 1980 | ErrorState *err; |
0185bd6f | 1981 | err_type page_id; |
9ce7856a | 1982 | page_id = aclGetDenyInfoPage(&Config.denyInfoList, AclMatchedName, 1); |
0185bd6f | 1983 | |
c466369c | 1984 | http->logType = LOG_TCP_DENIED_REPLY; |
1985 | ||
0185bd6f | 1986 | if (page_id == ERR_NONE) |
1987 | page_id = ERR_ACCESS_DENIED; | |
1988 | ||
b7ac5457 | 1989 | Ip::Address tmp_noaddr; |
26ac0430 | 1990 | tmp_noaddr.SetNoAddr(); |
cc192b50 | 1991 | err = clientBuildError(page_id, HTTP_FORBIDDEN, NULL, |
73c36fd9 | 1992 | http->getConn() != NULL ? http->getConn()->clientConnection->remote : tmp_noaddr, |
26ac0430 | 1993 | http->request); |
0185bd6f | 1994 | |
86a2f789 | 1995 | removeClientStoreReference(&sc, http); |
0185bd6f | 1996 | |
7dc5f514 | 1997 | HTTPMSGUNLOCK(reply); |
0185bd6f | 1998 | |
3c2c1d31 | 1999 | startError(err); |
2000 | ||
0185bd6f | 2001 | |
62e76326 | 2002 | return; |
2003 | } | |
2004 | ||
0976f8db | 2005 | /* Ok, the reply is allowed, */ |
2006 | http->loggingEntry(http->storeEntry()); | |
2007 | ||
7dc5f514 | 2008 | ssize_t body_size = reqofs - reply->hdr_sz; |
b297bcd0 | 2009 | if (body_size < 0) { |
26ac0430 AJ |
2010 | reqofs = reply->hdr_sz; |
2011 | body_size = 0; | |
b297bcd0 | 2012 | } |
0976f8db | 2013 | |
bf8fe701 | 2014 | debugs(88, 3, "clientReplyContext::sendMoreData: Appending " << |
2015 | (int) body_size << " bytes after " << reply->hdr_sz << | |
2016 | " bytes of headers"); | |
0976f8db | 2017 | |
f41735ea | 2018 | #if USE_SQUID_ESI |
62e76326 | 2019 | |
7dc5f514 | 2020 | if (http->flags.accel && reply->sline.status != HTTP_FORBIDDEN && |
2021 | !alwaysAllowResponse(reply->sline.status) && | |
2022 | esiEnableProcessing(reply)) { | |
bf8fe701 | 2023 | debugs(88, 2, "Enabling ESI processing for " << http->uri); |
43ae1d95 | 2024 | clientStreamInsertHead(&http->client_stream, esiStreamRead, |
2025 | esiProcessStream, esiStreamDetach, esiStreamStatus, NULL); | |
2026 | } | |
2027 | ||
5ef38a13 | 2028 | #endif |
2029 | ||
62e76326 | 2030 | if (http->request->method == METHOD_HEAD) { |
2031 | /* do not forward body for HEAD replies */ | |
2032 | body_size = 0; | |
2033 | http->flags.done_copying = 1; | |
2034 | flags.complete = 1; | |
2035 | } | |
2036 | ||
2037 | assert (!flags.headersSent); | |
2038 | flags.headersSent = true; | |
2039 | ||
8bcf08e0 | 2040 | StoreIOBuffer localTempBuffer; |
62e76326 | 2041 | char *buf = next()->readBuffer.data; |
e85eb4e1 | 2042 | char *body_buf = buf + reply->hdr_sz; |
62e76326 | 2043 | |
49ea0125 | 2044 | //Server side may disable ranges under some circumstances. |
2045 | ||
2046 | if ((!http->request->range)) | |
2047 | next()->readBuffer.offset = 0; | |
2048 | ||
e85eb4e1 AJ |
2049 | body_buf -= next()->readBuffer.offset; |
2050 | ||
62e76326 | 2051 | if (next()->readBuffer.offset != 0) { |
2052 | if (next()->readBuffer.offset > body_size) { | |
2324cda2 | 2053 | /* Can't use any of the body we received. send nothing */ |
8bcf08e0 FC |
2054 | localTempBuffer.length = 0; |
2055 | localTempBuffer.data = NULL; | |
62e76326 | 2056 | } else { |
8bcf08e0 FC |
2057 | localTempBuffer.length = body_size - next()->readBuffer.offset; |
2058 | localTempBuffer.data = body_buf + next()->readBuffer.offset; | |
62e76326 | 2059 | } |
2060 | } else { | |
8bcf08e0 FC |
2061 | localTempBuffer.length = body_size; |
2062 | localTempBuffer.data = body_buf; | |
62e76326 | 2063 | } |
2064 | ||
0655fa4d | 2065 | /* TODO??: move the data in the buffer back by the request header size */ |
62e76326 | 2066 | clientStreamCallback((clientStreamNode *)http->client_stream.head->data, |
8bcf08e0 | 2067 | http, reply, localTempBuffer); |
62e76326 | 2068 | |
2069 | return; | |
4993f571 | 2070 | } |
2071 | ||
528b2c61 | 2072 | void |
2073 | clientReplyContext::sendMoreData (StoreIOBuffer result) | |
2074 | { | |
50c09fc4 | 2075 | if (deleting) |
2076 | return; | |
2077 | ||
86a2f789 | 2078 | StoreEntry *entry = http->storeEntry(); |
50c09fc4 | 2079 | |
1cf238db | 2080 | ConnStateData * conn = http->getConn(); |
50c09fc4 | 2081 | |
137ac48a | 2082 | if (conn == NULL || !conn->isOpen()) { |
5c336a3b AJ |
2083 | // too late, our conn is closing |
2084 | // TODO: should we also quit? | |
73c36fd9 | 2085 | debugs(33,3, HERE << "not sending more data to a closing " << conn->clientConnection); |
9af2f95b AR |
2086 | return; |
2087 | } | |
50c09fc4 | 2088 | |
528b2c61 | 2089 | char *buf = next()->readBuffer.data; |
50c09fc4 | 2090 | |
da33c835 | 2091 | if (buf != result.data) { |
62e76326 | 2092 | /* we've got to copy some data */ |
2093 | assert(result.length <= next()->readBuffer.length); | |
41d00cd3 | 2094 | memcpy(buf, result.data, result.length); |
edce4d98 | 2095 | } |
62e76326 | 2096 | |
73c36fd9 | 2097 | if (reqofs==0 && !logTypeIsATcpHit(http->logType) && Comm::IsConnOpen(conn->clientConnection)) { |
425de4c8 | 2098 | if (Ip::Qos::TheConfig.isHitTosActive()) { |
73c36fd9 | 2099 | Ip::Qos::doTosLocalMiss(conn->clientConnection, http->request->hier.code); |
425de4c8 AJ |
2100 | } |
2101 | if (Ip::Qos::TheConfig.isHitNfmarkActive()) { | |
73c36fd9 | 2102 | Ip::Qos::doNfmarkLocalMiss(conn->clientConnection, http->request->hier.code); |
452bb8e2 | 2103 | } |
7172612f | 2104 | } |
7172612f | 2105 | |
ab9c533b HN |
2106 | /* We've got the final data to start pushing... */ |
2107 | flags.storelogiccomplete = 1; | |
2108 | ||
4993f571 | 2109 | reqofs += result.length; |
2110 | ||
2111 | assert(reqofs <= HTTP_REQBUF_SZ || flags.headersSent); | |
62e76326 | 2112 | |
edce4d98 | 2113 | assert(http->request != NULL); |
62e76326 | 2114 | |
edce4d98 | 2115 | /* ESI TODO: remove this assert once everything is stable */ |
2116 | assert(http->client_stream.head->data | |
62e76326 | 2117 | && cbdataReferenceValid(http->client_stream.head->data)); |
528b2c61 | 2118 | |
2119 | makeThisHead(); | |
62e76326 | 2120 | |
bf8fe701 | 2121 | debugs(88, 5, "clientReplyContext::sendMoreData: " << http->uri << ", " << |
47f6e231 | 2122 | reqofs << " bytes (" << result.length << |
bf8fe701 | 2123 | " new bytes)"); |
47f6e231 | 2124 | debugs(88, 5, "clientReplyContext::sendMoreData:" |
73c36fd9 | 2125 | << conn->clientConnection << |
26ac0430 AJ |
2126 | " '" << entry->url() << "'" << |
2127 | " out.offset=" << http->out.offset); | |
528b2c61 | 2128 | |
edce4d98 | 2129 | /* update size of the request */ |
4993f571 | 2130 | reqsize = reqofs; |
62e76326 | 2131 | |
4993f571 | 2132 | if (errorInStream(result, reqofs)) { |
62e76326 | 2133 | sendStreamError(result); |
2134 | return; | |
edce4d98 | 2135 | } |
528b2c61 | 2136 | |
2137 | if (flags.headersSent) { | |
62e76326 | 2138 | pushStreamData (result, buf); |
2139 | return; | |
edce4d98 | 2140 | } |
62e76326 | 2141 | |
b297bcd0 | 2142 | cloneReply(); |
21b92762 | 2143 | |
b297bcd0 | 2144 | /* handle headers */ |
21b92762 | 2145 | |
b297bcd0 | 2146 | if (Config.onoff.log_mime_hdrs) { |
26ac0430 | 2147 | size_t k; |
43ae1d95 | 2148 | |
26ac0430 | 2149 | if ((k = headersEnd(buf, reqofs))) { |
41ebd397 CT |
2150 | safe_free(http->al->headers.reply); |
2151 | http->al->headers.reply = (char *)xcalloc(k + 1, 1); | |
2152 | xstrncpy(http->al->headers.reply, buf, k); | |
26ac0430 | 2153 | } |
edce4d98 | 2154 | } |
b297bcd0 HN |
2155 | |
2156 | holdingBuffer = result; | |
2157 | processReplyAccess(); | |
2158 | return; | |
edce4d98 | 2159 | } |
2160 | ||
62e76326 | 2161 | |
edce4d98 | 2162 | |
2163 | /* Using this breaks the client layering just a little! | |
2164 | */ | |
0655fa4d | 2165 | void |
8bcf08e0 | 2166 | clientReplyContext::createStoreEntry(const HttpRequestMethod& m, request_flags reqFlags) |
edce4d98 | 2167 | { |
0655fa4d | 2168 | assert(http != NULL); |
edce4d98 | 2169 | /* |
2170 | * For erroneous requests, we might not have a h->request, | |
2171 | * so make a fake one. | |
2172 | */ | |
62e76326 | 2173 | |
0655fa4d | 2174 | if (http->request == NULL) |
0c3d3f65 | 2175 | http->request = HTTPMSGLOCK(new HttpRequest(m, AnyP::PROTO_NONE, null_string)); |
62e76326 | 2176 | |
8bcf08e0 | 2177 | StoreEntry *e = storeCreateEntry(http->uri, http->log_uri, reqFlags, m); |
62e76326 | 2178 | |
0655fa4d | 2179 | sc = storeClientListAdd(e, this); |
62e76326 | 2180 | |
9a0a18de | 2181 | #if USE_DELAY_POOLS |
0655fa4d | 2182 | sc->setDelayId(DelayId::DelayClient(http)); |
edce4d98 | 2183 | #endif |
62e76326 | 2184 | |
0655fa4d | 2185 | reqofs = 0; |
62e76326 | 2186 | |
0655fa4d | 2187 | reqsize = 0; |
62e76326 | 2188 | |
edce4d98 | 2189 | /* I don't think this is actually needed! -- adrian */ |
0655fa4d | 2190 | /* http->reqbuf = http->norm_reqbuf; */ |
2191 | // assert(http->reqbuf == http->norm_reqbuf); | |
edce4d98 | 2192 | /* The next line is illegal because we don't know if the client stream |
26ac0430 | 2193 | * buffers have been set up |
edce4d98 | 2194 | */ |
0655fa4d | 2195 | // storeClientCopy(http->sc, e, 0, HTTP_REQBUF_SZ, http->reqbuf, |
2196 | // SendMoreData, this); | |
edce4d98 | 2197 | /* So, we mark the store logic as complete */ |
8bcf08e0 | 2198 | flags.storelogiccomplete = 1; |
62e76326 | 2199 | |
edce4d98 | 2200 | /* and get the caller to request a read, from whereever they are */ |
62e76326 | 2201 | /* NOTE: after ANY data flows down the pipe, even one step, |
26ac0430 | 2202 | * this function CAN NOT be used to manage errors |
edce4d98 | 2203 | */ |
86a2f789 | 2204 | http->storeEntry(e); |
edce4d98 | 2205 | } |
2206 | ||
2207 | ErrorState * | |
2208 | clientBuildError(err_type page_id, http_status status, char const *url, | |
b7ac5457 | 2209 | Ip::Address &src_addr, HttpRequest * request) |
edce4d98 | 2210 | { |
913524f0 | 2211 | ErrorState *err = new ErrorState(page_id, status, request); |
cc192b50 | 2212 | err->src_addr = src_addr; |
62e76326 | 2213 | |
edce4d98 | 2214 | if (url) |
62e76326 | 2215 | err->url = xstrdup(url); |
2216 | ||
edce4d98 | 2217 | return err; |
2218 | } |