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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 | */ | |
f5bffbd5 | 34 | #include "config.h" |
edce4d98 | 35 | |
e1f7507e AJ |
36 | /* for ClientActiveRequests global */ |
37 | #include "dlink.h" | |
38 | ||
39 | /* old includes without reasons given. */ | |
edce4d98 | 40 | #include "squid.h" |
b7ac5457 AJ |
41 | #include "acl/FilledChecklist.h" |
42 | #include "acl/Gadgets.h" | |
43 | #include "auth/UserRequest.h" | |
44 | #include "client_side.h" | |
0655fa4d | 45 | #include "client_side_reply.h" |
c8be6d7b | 46 | #include "clientStream.h" |
b7ac5457 AJ |
47 | #if DELAY_POOLS |
48 | #include "DelayPools.h" | |
49 | #endif | |
50 | #include "errorpage.h" | |
f41735ea | 51 | #if USE_SQUID_ESI |
f99c2cfe | 52 | #include "esi/Esi.h" |
43ae1d95 | 53 | #endif |
7172612f | 54 | #include "fde.h" |
b7ac5457 AJ |
55 | #include "forward.h" |
56 | #include "HttpReply.h" | |
57 | #include "HttpRequest.h" | |
58 | #include "ip/QosConfig.h" | |
59 | #include "MemObject.h" | |
985c86bc | 60 | #include "SquidTime.h" |
b7ac5457 AJ |
61 | #include "StoreClient.h" |
62 | #include "Store.h" | |
e6ccf245 | 63 | |
0655fa4d | 64 | CBDATA_CLASS_INIT(clientReplyContext); |
edce4d98 | 65 | |
edce4d98 | 66 | /* Local functions */ |
e6ccf245 | 67 | extern "C" CSS clientReplyStatus; |
b7ac5457 | 68 | extern ErrorState *clientBuildError(err_type, http_status, char const *, Ip::Address &, HttpRequest *); |
edce4d98 | 69 | |
edce4d98 | 70 | /* privates */ |
edce4d98 | 71 | |
0655fa4d | 72 | clientReplyContext::~clientReplyContext() |
edce4d98 | 73 | { |
50c09fc4 | 74 | deleting = true; |
75 | /* This may trigger a callback back into SendMoreData as the cbdata | |
76 | * is still valid | |
77 | */ | |
86a2f789 | 78 | removeClientStoreReference(&sc, http); |
edce4d98 | 79 | /* old_entry might still be set if we didn't yet get the reply |
0655fa4d | 80 | * code in HandleIMSReply() */ |
81 | removeStoreReference(&old_sc, &old_entry); | |
82 | safe_free(tempBuffer.data); | |
83 | cbdataReferenceDone(http); | |
2b7d324b | 84 | HTTPMSGUNLOCK(reply); |
edce4d98 | 85 | } |
86 | ||
59a1efb2 | 87 | clientReplyContext::clientReplyContext(ClientHttpRequest *clientContext) : http (cbdataReference(clientContext)), old_entry (NULL), old_sc(NULL), deleting(false) |
0655fa4d | 88 | {} |
edce4d98 | 89 | |
a5c8d64d AJ |
90 | /** Create an error in the store awaiting the client side to read it. |
91 | * | |
92 | * This may be better placed in the clientStream logic, but it has not been | |
0655fa4d | 93 | * relocated there yet |
94 | */ | |
edce4d98 | 95 | void |
0655fa4d | 96 | clientReplyContext::setReplyToError( |
60745f24 | 97 | err_type err, http_status status, const HttpRequestMethod& method, char const *uri, |
b7ac5457 | 98 | Ip::Address &addr, HttpRequest * failedrequest, const char *unparsedrequest, |
a33a428a | 99 | AuthUserRequest::Pointer auth_user_request) |
edce4d98 | 100 | { |
a33a428a | 101 | ErrorState *errstate = clientBuildError(err, status, uri, addr, failedrequest); |
62e76326 | 102 | |
edce4d98 | 103 | if (unparsedrequest) |
62e76326 | 104 | errstate->request_hdrs = xstrdup(unparsedrequest); |
edce4d98 | 105 | |
0655fa4d | 106 | if (status == HTTP_NOT_IMPLEMENTED && http->request) |
62e76326 | 107 | /* prevent confusion over whether we default to persistent or not */ |
0655fa4d | 108 | http->request->flags.proxy_keepalive = 0; |
62e76326 | 109 | |
0655fa4d | 110 | http->al.http.code = errstate->httpStatus; |
edce4d98 | 111 | |
0655fa4d | 112 | createStoreEntry(method, request_flags()); |
62e76326 | 113 | |
a33a428a | 114 | errstate->auth_user_request = auth_user_request; |
62e76326 | 115 | |
edce4d98 | 116 | assert(errstate->callback_data == NULL); |
86a2f789 | 117 | errorAppendEntry(http->storeEntry(), errstate); |
edce4d98 | 118 | /* Now the caller reads to get this */ |
119 | } | |
120 | ||
121 | void | |
0655fa4d | 122 | clientReplyContext::removeStoreReference(store_client ** scp, |
123 | StoreEntry ** ep) | |
edce4d98 | 124 | { |
125 | StoreEntry *e; | |
e4ae841b | 126 | store_client *sc_tmp = *scp; |
62e76326 | 127 | |
edce4d98 | 128 | if ((e = *ep) != NULL) { |
62e76326 | 129 | *ep = NULL; |
e4ae841b | 130 | storeUnregister(sc_tmp, e, this); |
62e76326 | 131 | *scp = NULL; |
97b5e68f | 132 | e->unlock(); |
edce4d98 | 133 | } |
134 | } | |
135 | ||
86a2f789 | 136 | void |
8bcf08e0 | 137 | clientReplyContext::removeClientStoreReference(store_client **scp, ClientHttpRequest *aHttpRequest) |
86a2f789 | 138 | { |
8bcf08e0 | 139 | StoreEntry *reference = aHttpRequest->storeEntry(); |
86a2f789 | 140 | removeStoreReference(scp, &reference); |
8bcf08e0 | 141 | aHttpRequest->storeEntry(reference); |
86a2f789 | 142 | } |
143 | ||
e6ccf245 | 144 | void * |
a695955b | 145 | clientReplyContext::operator new (size_t byteCount) |
e6ccf245 | 146 | { |
147 | /* derived classes with different sizes must implement their own new */ | |
148 | assert (byteCount == sizeof (clientReplyContext)); | |
0655fa4d | 149 | CBDATA_INIT_TYPE(clientReplyContext); |
e6ccf245 | 150 | return cbdataAlloc(clientReplyContext); |
151 | } | |
152 | ||
153 | void | |
154 | clientReplyContext::operator delete (void *address) | |
155 | { | |
a50bfe93 | 156 | clientReplyContext * tmp = (clientReplyContext *)address; |
157 | cbdataFree (tmp); | |
e6ccf245 | 158 | } |
159 | ||
edce4d98 | 160 | void |
0655fa4d | 161 | clientReplyContext::saveState() |
edce4d98 | 162 | { |
e6ccf245 | 163 | assert(old_sc == NULL); |
bf8fe701 | 164 | debugs(88, 3, "clientReplyContext::saveState: saving store context"); |
86a2f789 | 165 | old_entry = http->storeEntry(); |
e6ccf245 | 166 | old_sc = sc; |
167 | old_reqsize = reqsize; | |
168 | tempBuffer.offset = reqofs; | |
edce4d98 | 169 | /* Prevent accessing the now saved entries */ |
86a2f789 | 170 | http->storeEntry(NULL); |
e6ccf245 | 171 | sc = NULL; |
172 | reqsize = 0; | |
173 | reqofs = 0; | |
edce4d98 | 174 | } |
175 | ||
176 | void | |
0655fa4d | 177 | clientReplyContext::restoreState() |
edce4d98 | 178 | { |
e6ccf245 | 179 | assert(old_sc != NULL); |
bf8fe701 | 180 | debugs(88, 3, "clientReplyContext::restoreState: Restoring store context"); |
86a2f789 | 181 | removeClientStoreReference(&sc, http); |
182 | http->storeEntry(old_entry); | |
e6ccf245 | 183 | sc = old_sc; |
184 | reqsize = old_reqsize; | |
185 | reqofs = tempBuffer.offset; | |
edce4d98 | 186 | /* Prevent accessed the old saved entries */ |
0655fa4d | 187 | old_entry = NULL; |
e6ccf245 | 188 | old_sc = NULL; |
189 | old_reqsize = 0; | |
190 | tempBuffer.offset = 0; | |
c8be6d7b | 191 | } |
192 | ||
193 | void | |
0655fa4d | 194 | clientReplyContext::startError(ErrorState * err) |
c8be6d7b | 195 | { |
0655fa4d | 196 | createStoreEntry(http->request->method, request_flags()); |
197 | triggerInitialStoreRead(); | |
86a2f789 | 198 | errorAppendEntry(http->storeEntry(), err); |
edce4d98 | 199 | } |
200 | ||
e6ccf245 | 201 | clientStreamNode * |
528b2c61 | 202 | clientReplyContext::getNextNode() const |
e6ccf245 | 203 | { |
62e76326 | 204 | return (clientStreamNode *)ourNode->node.next->data; |
e6ccf245 | 205 | } |
206 | ||
62e76326 | 207 | /* This function is wrong - the client parameters don't include the |
528b2c61 | 208 | * header offset |
209 | */ | |
c8be6d7b | 210 | void |
0655fa4d | 211 | clientReplyContext::triggerInitialStoreRead() |
c8be6d7b | 212 | { |
0655fa4d | 213 | /* when confident, 0 becomes reqofs, and then this factors into |
26ac0430 | 214 | * startSendProcess |
528b2c61 | 215 | */ |
0655fa4d | 216 | assert(reqofs == 0); |
8bcf08e0 FC |
217 | StoreIOBuffer localTempBuffer (next()->readBuffer.length, 0, next()->readBuffer.data); |
218 | storeClientCopy(sc, http->storeEntry(), localTempBuffer, SendMoreData, this); | |
c8be6d7b | 219 | } |
edce4d98 | 220 | |
221 | /* there is an expired entry in the store. | |
222 | * setup a temporary buffer area and perform an IMS to the origin | |
223 | */ | |
0655fa4d | 224 | void |
225 | clientReplyContext::processExpired() | |
edce4d98 | 226 | { |
edce4d98 | 227 | char *url = http->uri; |
228 | StoreEntry *entry = NULL; | |
bf8fe701 | 229 | debugs(88, 3, "clientReplyContext::processExpired: '" << http->uri << "'"); |
86a2f789 | 230 | assert(http->storeEntry()->lastmod >= 0); |
edce4d98 | 231 | /* |
232 | * check if we are allowed to contact other servers | |
26ac0430 | 233 | * @?@: Instead of a 504 (Gateway Timeout) reply, we may want to return |
edce4d98 | 234 | * a stale entry *if* it matches client requirements |
235 | */ | |
62e76326 | 236 | |
0655fa4d | 237 | if (http->onlyIfCached()) { |
238 | processOnlyIfCachedMiss(); | |
62e76326 | 239 | return; |
edce4d98 | 240 | } |
62e76326 | 241 | |
edce4d98 | 242 | http->request->flags.refresh = 1; |
243 | #if STORE_CLIENT_LIST_DEBUG | |
c8be6d7b | 244 | /* Prevent a race with the store client memory free routines |
edce4d98 | 245 | */ |
0655fa4d | 246 | assert(storeClientIsThisAClient(sc, this)); |
edce4d98 | 247 | #endif |
248 | /* Prepare to make a new temporary request */ | |
0655fa4d | 249 | saveState(); |
edce4d98 | 250 | entry = storeCreateEntry(url, |
62e76326 | 251 | http->log_uri, http->request->flags, http->request->method); |
34266cde | 252 | /* NOTE, don't call StoreEntry->lock(), storeCreateEntry() does it */ |
0655fa4d | 253 | sc = storeClientListAdd(entry, this); |
edce4d98 | 254 | #if DELAY_POOLS |
255 | /* delay_id is already set on original store client */ | |
0655fa4d | 256 | sc->setDelayId(DelayId::DelayClient(http)); |
edce4d98 | 257 | #endif |
62e76326 | 258 | |
0655fa4d | 259 | http->request->lastmod = old_entry->lastmod; |
4a7a3d56 | 260 | debugs(88, 5, "clientReplyContext::processExpired : lastmod " << entry->lastmod ); |
86a2f789 | 261 | http->storeEntry(entry); |
c8be6d7b | 262 | assert(http->out.offset == 0); |
b2d22df6 | 263 | |
264 | /* | |
265 | * A refcounted pointer so that FwdState stays around as long as | |
266 | * this clientReplyContext does | |
267 | */ | |
94a396a3 | 268 | FwdState::fwdStart(http->getConn() != NULL ? http->getConn()->fd : -1, |
be0c6690 | 269 | http->storeEntry(), |
270 | http->request); | |
edce4d98 | 271 | /* Register with storage manager to receive updates when data comes in. */ |
62e76326 | 272 | |
edce4d98 | 273 | if (EBIT_TEST(entry->flags, ENTRY_ABORTED)) |
bf8fe701 | 274 | debugs(88, 0, "clientReplyContext::processExpired: Found ENTRY_ABORTED object"); |
62e76326 | 275 | |
c8be6d7b | 276 | { |
62e76326 | 277 | /* start counting the length from 0 */ |
8bcf08e0 FC |
278 | StoreIOBuffer localTempBuffer(HTTP_REQBUF_SZ, 0, tempbuf); |
279 | storeClientCopy(sc, entry, localTempBuffer, HandleIMSReply, this); | |
edce4d98 | 280 | } |
281 | } | |
282 | ||
edce4d98 | 283 | |
528b2c61 | 284 | void |
285 | clientReplyContext::sendClientUpstreamResponse() | |
286 | { | |
287 | StoreIOBuffer tempresult; | |
0655fa4d | 288 | removeStoreReference(&old_sc, &old_entry); |
2324cda2 | 289 | /* here the data to send is the data we just received */ |
528b2c61 | 290 | tempBuffer.offset = 0; |
291 | old_reqsize = 0; | |
0655fa4d | 292 | /* sendMoreData tracks the offset as well. |
528b2c61 | 293 | * Force it back to zero */ |
294 | reqofs = 0; | |
86a2f789 | 295 | assert(!EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)); |
0655fa4d | 296 | /* TODO: provide sendMoreData with the ready parsed reply */ |
528b2c61 | 297 | tempresult.length = reqsize; |
298 | tempresult.data = tempbuf; | |
0655fa4d | 299 | sendMoreData(tempresult); |
528b2c61 | 300 | } |
301 | ||
edce4d98 | 302 | void |
0655fa4d | 303 | clientReplyContext::HandleIMSReply(void *data, StoreIOBuffer result) |
edce4d98 | 304 | { |
e6ccf245 | 305 | clientReplyContext *context = (clientReplyContext *)data; |
0655fa4d | 306 | context->handleIMSReply(result); |
307 | } | |
62e76326 | 308 | |
0655fa4d | 309 | void |
310 | clientReplyContext::sendClientOldEntry() | |
311 | { | |
312 | /* Get the old request back */ | |
313 | restoreState(); | |
314 | /* here the data to send is in the next nodes buffers already */ | |
86a2f789 | 315 | assert(!EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)); |
0655fa4d | 316 | /* sendMoreData tracks the offset as well. |
317 | * Force it back to zero */ | |
318 | reqofs = 0; | |
319 | StoreIOBuffer tempresult (reqsize, reqofs, next()->readBuffer.data); | |
320 | sendMoreData(tempresult); | |
321 | } | |
62e76326 | 322 | |
1d7ab0f4 | 323 | /* This is the workhorse of the HandleIMSReply callback. |
324 | * | |
325 | * It is called when we've got data back from the origin following our | |
326 | * IMS request to revalidate a stale entry. | |
327 | */ | |
0655fa4d | 328 | void |
1d7ab0f4 | 329 | clientReplyContext::handleIMSReply(StoreIOBuffer result) |
0655fa4d | 330 | { |
1d7ab0f4 | 331 | if (deleting) |
332 | return; | |
62e76326 | 333 | |
bf8fe701 | 334 | debugs(88, 3, "handleIMSReply: " << http->storeEntry()->url() << ", " << (long unsigned) result.length << " bytes" ); |
62e76326 | 335 | |
1d7ab0f4 | 336 | if (http->storeEntry() == NULL) |
337 | return; | |
07947ad8 | 338 | |
1d7ab0f4 | 339 | if (result.flags.error && !EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) |
340 | return; | |
62e76326 | 341 | |
1d7ab0f4 | 342 | /* update size of the request */ |
343 | reqsize = result.length + reqofs; | |
62e76326 | 344 | |
1d7ab0f4 | 345 | const http_status status = http->storeEntry()->getReply()->sline.status; |
62e76326 | 346 | |
1d7ab0f4 | 347 | // request to origin was aborted |
348 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) { | |
bf8fe701 | 349 | debugs(88, 3, "handleIMSReply: request to origin aborted '" << http->storeEntry()->url() << "', sending old entry to client" ); |
1d7ab0f4 | 350 | http->logType = LOG_TCP_REFRESH_FAIL; |
351 | sendClientOldEntry(); | |
0655fa4d | 352 | } |
62e76326 | 353 | |
b297bcd0 | 354 | HttpReply *old_rep = (HttpReply *) old_entry->getReply(); |
62e76326 | 355 | |
b297bcd0 | 356 | // origin replied 304 |
7ddfeb80 FC |
357 | // TODO FIXME: old_rep2 was forcibly unshadowed, used to be old_rep. Are we sure |
358 | // that the right semantics were preserved? | |
b297bcd0 | 359 | if (status == HTTP_NOT_MODIFIED) { |
26ac0430 | 360 | http->logType = LOG_TCP_REFRESH_UNMODIFIED; |
045a76ab | 361 | |
26ac0430 | 362 | // update headers on existing entry |
7ddfeb80 FC |
363 | HttpReply *old_rep2 = (HttpReply *) old_entry->getReply(); |
364 | old_rep2->updateOnNotModified(http->storeEntry()->getReply()); | |
26ac0430 | 365 | old_entry->timestampsSet(); |
62e76326 | 366 | |
26ac0430 | 367 | // if client sent IMS |
62e76326 | 368 | |
ee15ba9b | 369 | if (http->request->flags.ims && !old_entry->modifiedSince(http->request)) { |
26ac0430 AJ |
370 | // forward the 304 from origin |
371 | debugs(88, 3, "handleIMSReply: origin replied 304, revalidating existing entry and forwarding 304 to client"); | |
372 | sendClientUpstreamResponse(); | |
373 | } else { | |
374 | // send existing entry, it's still valid | |
375 | debugs(88, 3, "handleIMSReply: origin replied 304, revalidating existing entry and sending " << | |
7ddfeb80 | 376 | old_rep2->sline.status << " to client"); |
26ac0430 AJ |
377 | sendClientOldEntry(); |
378 | } | |
b297bcd0 | 379 | } |
62e76326 | 380 | |
b297bcd0 HN |
381 | // origin replied with a non-error code |
382 | else if (status > HTTP_STATUS_NONE && status < HTTP_INTERNAL_SERVER_ERROR) { | |
26ac0430 AJ |
383 | // forward response from origin |
384 | http->logType = LOG_TCP_REFRESH_MODIFIED; | |
385 | debugs(88, 3, "handleIMSReply: origin replied " << status << ", replacing existing entry and forwarding to client"); | |
386 | sendClientUpstreamResponse(); | |
b297bcd0 | 387 | } |
62e76326 | 388 | |
b297bcd0 HN |
389 | // origin replied with an error |
390 | else { | |
26ac0430 AJ |
391 | // ignore and let client have old entry |
392 | http->logType = LOG_TCP_REFRESH_FAIL; | |
393 | debugs(88, 3, "handleIMSReply: origin replied with error " << | |
394 | status << ", sending old entry (" << old_rep->sline.status << ") to client"); | |
395 | sendClientOldEntry(); | |
1d7ab0f4 | 396 | } |
edce4d98 | 397 | } |
398 | ||
e6ccf245 | 399 | extern "C" CSR clientGetMoreData; |
400 | extern "C" CSD clientReplyDetach; | |
edce4d98 | 401 | |
7d5f62a4 AJ |
402 | /** |
403 | * clientReplyContext::cacheHit Should only be called until the HTTP reply headers | |
edce4d98 | 404 | * have been parsed. Normally this should be a single call, but |
405 | * it might take more than one. As soon as we have the headers, | |
0655fa4d | 406 | * we hand off to clientSendMoreData, processExpired, or |
407 | * processMiss. | |
edce4d98 | 408 | */ |
409 | void | |
0655fa4d | 410 | clientReplyContext::CacheHit(void *data, StoreIOBuffer result) |
edce4d98 | 411 | { |
e6ccf245 | 412 | clientReplyContext *context = (clientReplyContext *)data; |
7d5f62a4 | 413 | context->cacheHit(result); |
0655fa4d | 414 | } |
415 | ||
7d5f62a4 AJ |
416 | /** |
417 | * Process a possible cache HIT. | |
418 | */ | |
0655fa4d | 419 | void |
420 | clientReplyContext::cacheHit(StoreIOBuffer result) | |
421 | { | |
7d5f62a4 | 422 | /** Ignore if the HIT object is being deleted. */ |
045a76ab | 423 | if (deleting) |
424 | return; | |
425 | ||
86a2f789 | 426 | StoreEntry *e = http->storeEntry(); |
045a76ab | 427 | |
190154cf | 428 | HttpRequest *r = http->request; |
045a76ab | 429 | |
4a7a3d56 | 430 | debugs(88, 3, "clientCacheHit: " << http->uri << ", " << result.length << " bytes"); |
62e76326 | 431 | |
86a2f789 | 432 | if (http->storeEntry() == NULL) { |
bf8fe701 | 433 | debugs(88, 3, "clientCacheHit: request aborted"); |
62e76326 | 434 | return; |
c8be6d7b | 435 | } else if (result.flags.error) { |
62e76326 | 436 | /* swap in failure */ |
bf8fe701 | 437 | debugs(88, 3, "clientCacheHit: swapin failure for " << http->uri); |
62e76326 | 438 | http->logType = LOG_TCP_SWAPFAIL_MISS; |
86a2f789 | 439 | removeClientStoreReference(&sc, http); |
0655fa4d | 440 | processMiss(); |
62e76326 | 441 | return; |
edce4d98 | 442 | } |
62e76326 | 443 | |
d3b3ab85 | 444 | if (result.length == 0) { |
62e76326 | 445 | /* the store couldn't get enough data from the file for us to id the |
446 | * object | |
447 | */ | |
448 | /* treat as a miss */ | |
449 | http->logType = LOG_TCP_MISS; | |
0655fa4d | 450 | processMiss(); |
62e76326 | 451 | return; |
d3b3ab85 | 452 | } |
62e76326 | 453 | |
edce4d98 | 454 | assert(!EBIT_TEST(e->flags, ENTRY_ABORTED)); |
455 | /* update size of the request */ | |
0655fa4d | 456 | reqsize = result.length + reqofs; |
62e76326 | 457 | |
edce4d98 | 458 | /* |
459 | * Got the headers, now grok them | |
460 | */ | |
29b8d8d6 | 461 | assert(http->logType == LOG_TCP_HIT); |
62e76326 | 462 | |
cdd4e1c1 | 463 | if (strcmp(e->mem_obj->url, urlCanonical(r)) != 0) { |
26ac0430 | 464 | debugs(33, 1, "clientProcessHit: URL mismatch, '" << e->mem_obj->url << "' != '" << urlCanonical(r) << "'"); |
cdd4e1c1 | 465 | processMiss(); |
466 | return; | |
467 | } | |
468 | ||
edce4d98 | 469 | switch (varyEvaluateMatch(e, r)) { |
62e76326 | 470 | |
edce4d98 | 471 | case VARY_NONE: |
62e76326 | 472 | /* No variance detected. Continue as normal */ |
473 | break; | |
474 | ||
edce4d98 | 475 | case VARY_MATCH: |
62e76326 | 476 | /* This is the correct entity for this request. Continue */ |
bf8fe701 | 477 | debugs(88, 2, "clientProcessHit: Vary MATCH!"); |
62e76326 | 478 | break; |
479 | ||
edce4d98 | 480 | case VARY_OTHER: |
62e76326 | 481 | /* This is not the correct entity for this request. We need |
482 | * to requery the cache. | |
483 | */ | |
86a2f789 | 484 | removeClientStoreReference(&sc, http); |
62e76326 | 485 | e = NULL; |
486 | /* Note: varyEvalyateMatch updates the request with vary information | |
487 | * so we only get here once. (it also takes care of cancelling loops) | |
488 | */ | |
26ac0430 | 489 | debugs(88, 2, "clientProcessHit: Vary detected!"); |
0655fa4d | 490 | clientGetMoreData(ourNode, http); |
62e76326 | 491 | return; |
492 | ||
edce4d98 | 493 | case VARY_CANCEL: |
62e76326 | 494 | /* varyEvaluateMatch found a object loop. Process as miss */ |
bf8fe701 | 495 | debugs(88, 1, "clientProcessHit: Vary object loop!"); |
0655fa4d | 496 | processMiss(); |
62e76326 | 497 | return; |
edce4d98 | 498 | } |
62e76326 | 499 | |
edce4d98 | 500 | if (r->method == METHOD_PURGE) { |
86a2f789 | 501 | removeClientStoreReference(&sc, http); |
62e76326 | 502 | e = NULL; |
0655fa4d | 503 | purgeRequest(); |
62e76326 | 504 | return; |
edce4d98 | 505 | } |
62e76326 | 506 | |
3900307b | 507 | if (e->checkNegativeHit() |
626096be | 508 | #if USE_HTTP_VIOLATIONS |
36e6655b | 509 | && !r->flags.nocache_hack |
510 | #endif | |
511 | ) { | |
62e76326 | 512 | http->logType = LOG_TCP_NEGATIVE_HIT; |
0655fa4d | 513 | sendMoreData(result); |
f7cf9b8c | 514 | } else if (!Config.onoff.offline && refreshCheckHTTP(e, r) && !http->flags.internal) { |
bf8fe701 | 515 | debugs(88, 5, "clientCacheHit: in refreshCheck() block"); |
62e76326 | 516 | /* |
517 | * We hold a stale copy; it needs to be validated | |
518 | */ | |
519 | /* | |
520 | * The 'need_validation' flag is used to prevent forwarding | |
521 | * loops between siblings. If our copy of the object is stale, | |
522 | * then we should probably only use parents for the validation | |
523 | * request. Otherwise two siblings could generate a loop if | |
524 | * both have a stale version of the object. | |
525 | */ | |
526 | r->flags.need_validation = 1; | |
527 | ||
528 | if (e->lastmod < 0) { | |
529 | /* | |
530 | * Previous reply didn't have a Last-Modified header, | |
531 | * we cannot revalidate it. | |
532 | */ | |
533 | http->logType = LOG_TCP_MISS; | |
0655fa4d | 534 | processMiss(); |
62e76326 | 535 | } else if (r->flags.nocache) { |
536 | /* | |
537 | * This did not match a refresh pattern that overrides no-cache | |
538 | * we should honour the client no-cache header. | |
539 | */ | |
540 | http->logType = LOG_TCP_CLIENT_REFRESH_MISS; | |
0655fa4d | 541 | processMiss(); |
62e76326 | 542 | } else if (r->protocol == PROTO_HTTP) { |
543 | /* | |
544 | * Object needs to be revalidated | |
545 | * XXX This could apply to FTP as well, if Last-Modified is known. | |
546 | */ | |
0655fa4d | 547 | processExpired(); |
62e76326 | 548 | } else { |
549 | /* | |
550 | * We don't know how to re-validate other protocols. Handle | |
551 | * them as if the object has expired. | |
552 | */ | |
553 | http->logType = LOG_TCP_MISS; | |
0655fa4d | 554 | processMiss(); |
62e76326 | 555 | } |
edce4d98 | 556 | } else if (r->flags.ims) { |
62e76326 | 557 | /* |
558 | * Handle If-Modified-Since requests from the client | |
559 | */ | |
560 | ||
561 | if (e->getReply()->sline.status != HTTP_OK) { | |
bf8fe701 | 562 | debugs(88, 4, "clientCacheHit: Reply code " << |
563 | e->getReply()->sline.status << " != 200"); | |
62e76326 | 564 | http->logType = LOG_TCP_MISS; |
0655fa4d | 565 | processMiss(); |
566 | } else if (e->modifiedSince(http->request)) { | |
62e76326 | 567 | http->logType = LOG_TCP_IMS_HIT; |
0655fa4d | 568 | sendMoreData(result); |
62e76326 | 569 | } else { |
0655fa4d | 570 | time_t const timestamp = e->timestamp; |
06a5ae20 | 571 | HttpReply *temprep = e->getReply()->make304(); |
62e76326 | 572 | http->logType = LOG_TCP_IMS_HIT; |
86a2f789 | 573 | removeClientStoreReference(&sc, http); |
0655fa4d | 574 | createStoreEntry(http->request->method, |
575 | request_flags()); | |
86a2f789 | 576 | e = http->storeEntry(); |
62e76326 | 577 | /* |
578 | * Copy timestamp from the original entry so the 304 | |
579 | * reply has a meaningful Age: header. | |
580 | */ | |
581 | e->timestamp = timestamp; | |
db237875 | 582 | e->replaceHttpReply(temprep); |
62e76326 | 583 | e->complete(); |
584 | /* TODO: why put this in the store and then serialise it and then parse it again. | |
585 | * Simply mark the request complete in our context and | |
586 | * write the reply struct to the client side | |
587 | */ | |
0655fa4d | 588 | triggerInitialStoreRead(); |
62e76326 | 589 | } |
edce4d98 | 590 | } else { |
62e76326 | 591 | /* |
592 | * plain ol' cache hit | |
593 | */ | |
594 | ||
8d5f19a0 | 595 | #if DELAY_POOLS |
ffdf45f2 | 596 | if (e->store_status != STORE_OK) |
849b826a | 597 | http->logType = LOG_TCP_MISS; |
5bf4d170 | 598 | else |
599 | #endif | |
26ac0430 AJ |
600 | if (e->mem_status == IN_MEMORY) |
601 | http->logType = LOG_TCP_MEM_HIT; | |
602 | else if (Config.onoff.offline) | |
603 | http->logType = LOG_TCP_OFFLINE_HIT; | |
62e76326 | 604 | |
0655fa4d | 605 | sendMoreData(result); |
edce4d98 | 606 | } |
607 | } | |
608 | ||
7d5f62a4 | 609 | /** |
edce4d98 | 610 | * Prepare to fetch the object as it's a cache miss of some kind. |
611 | */ | |
612 | void | |
0655fa4d | 613 | clientReplyContext::processMiss() |
edce4d98 | 614 | { |
edce4d98 | 615 | char *url = http->uri; |
190154cf | 616 | HttpRequest *r = http->request; |
edce4d98 | 617 | ErrorState *err = NULL; |
60745f24 | 618 | debugs(88, 4, "clientProcessMiss: '" << RequestMethodStr(r->method) << " " << url << "'"); |
7d5f62a4 AJ |
619 | |
620 | /** | |
edce4d98 | 621 | * We might have a left-over StoreEntry from a failed cache hit |
622 | * or IMS request. | |
623 | */ | |
86a2f789 | 624 | if (http->storeEntry()) { |
625 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_SPECIAL)) { | |
bf8fe701 | 626 | debugs(88, 0, "clientProcessMiss: miss on a special object (" << url << ")."); |
627 | debugs(88, 0, "\tlog_type = " << log_tags[http->logType]); | |
3900307b | 628 | http->storeEntry()->dump(1); |
62e76326 | 629 | } |
630 | ||
86a2f789 | 631 | removeClientStoreReference(&sc, http); |
edce4d98 | 632 | } |
62e76326 | 633 | |
7d5f62a4 | 634 | /** Check if its a PURGE request to be actioned. */ |
edce4d98 | 635 | if (r->method == METHOD_PURGE) { |
0655fa4d | 636 | purgeRequest(); |
62e76326 | 637 | return; |
edce4d98 | 638 | } |
914b89a2 | 639 | |
7d5f62a4 | 640 | /** Check if its an 'OTHER' request. Purge all cached entries if so and continue. */ |
914b89a2 | 641 | if (r->method == METHOD_OTHER) { |
26ac0430 | 642 | purgeAllCached(); |
60745f24 | 643 | } |
62e76326 | 644 | |
7d5f62a4 | 645 | /** Check if 'only-if-cached' flag is set. Action if so. */ |
0655fa4d | 646 | if (http->onlyIfCached()) { |
647 | processOnlyIfCachedMiss(); | |
62e76326 | 648 | return; |
edce4d98 | 649 | } |
62e76326 | 650 | |
ce5a16c2 AR |
651 | /// Deny loops for accelerator and interceptor. TODO: deny in all modes? |
652 | if (r->flags.loopdetect && | |
e1381638 | 653 | (http->flags.accel || http->flags.intercepted)) { |
62e76326 | 654 | http->al.http.code = HTTP_FORBIDDEN; |
cc192b50 | 655 | err = clientBuildError(ERR_ACCESS_DENIED, HTTP_FORBIDDEN, NULL, http->getConn()->peer, http->request); |
0655fa4d | 656 | createStoreEntry(r->method, request_flags()); |
86a2f789 | 657 | errorAppendEntry(http->storeEntry(), err); |
0655fa4d | 658 | triggerInitialStoreRead(); |
62e76326 | 659 | return; |
edce4d98 | 660 | } else { |
26ac0430 | 661 | assert(http->out.offset == 0); |
0655fa4d | 662 | createStoreEntry(r->method, r->flags); |
663 | triggerInitialStoreRead(); | |
62e76326 | 664 | |
665 | if (http->redirect.status) { | |
06a5ae20 | 666 | HttpReply *rep = new HttpReply; |
edce4d98 | 667 | #if LOG_TCP_REDIRECTS |
62e76326 | 668 | |
669 | http->logType = LOG_TCP_REDIRECT; | |
edce4d98 | 670 | #endif |
62e76326 | 671 | |
d88e3c49 | 672 | http->storeEntry()->releaseRequest(); |
06a5ae20 | 673 | rep->redirect(http->redirect.status, http->redirect.location); |
db237875 | 674 | http->storeEntry()->replaceHttpReply(rep); |
86a2f789 | 675 | http->storeEntry()->complete(); |
62e76326 | 676 | return; |
677 | } | |
678 | ||
7d5f62a4 | 679 | /** Check for internal requests. Update Protocol info if so. */ |
62e76326 | 680 | if (http->flags.internal) |
681 | r->protocol = PROTO_INTERNAL; | |
682 | ||
7d5f62a4 | 683 | /** Start forwarding to get the new object from network */ |
94a396a3 | 684 | FwdState::fwdStart(http->getConn() != NULL ? http->getConn()->fd : -1, |
be0c6690 | 685 | http->storeEntry(), |
686 | r); | |
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 | { |
edce4d98 | 699 | ErrorState *err = NULL; |
bf8fe701 | 700 | debugs(88, 4, "clientProcessOnlyIfCachedMiss: '" << |
60745f24 | 701 | RequestMethodStr(http->request->method) << " " << http->uri << "'"); |
edce4d98 | 702 | http->al.http.code = HTTP_GATEWAY_TIMEOUT; |
cc192b50 | 703 | err = clientBuildError(ERR_ONLY_IF_CACHED_MISS, HTTP_GATEWAY_TIMEOUT, NULL, http->getConn()->peer, http->request); |
86a2f789 | 704 | removeClientStoreReference(&sc, http); |
0655fa4d | 705 | startError(err); |
edce4d98 | 706 | } |
707 | ||
708 | void | |
e6ccf245 | 709 | clientReplyContext::purgeRequestFindObjectToPurge() |
26ac0430 | 710 | { |
e6ccf245 | 711 | /* Try to find a base entry */ |
712 | http->flags.purging = 1; | |
713 | lookingforstore = 1; | |
26ac0430 AJ |
714 | |
715 | // TODO: can we use purgeAllCached() here instead of doing the | |
716 | // getPublicByRequestMethod() dance? | |
3b13a8fd | 717 | StoreEntry::getPublicByRequestMethod(this, http->request, METHOD_GET); |
e6ccf245 | 718 | } |
719 | ||
c1520b67 AJ |
720 | // Purges all entries with a given url |
721 | // TODO: move to SideAgent parent, when we have one | |
60745f24 | 722 | /* |
723 | * We probably cannot purge Vary-affected responses because their MD5 | |
724 | * keys depend on vary headers. | |
725 | */ | |
c1520b67 | 726 | void |
90bd689c | 727 | purgeEntriesByUrl(HttpRequest * req, const char *url) |
c1520b67 | 728 | { |
8dceeee3 BR |
729 | #if USE_HTCP |
730 | bool get_or_head_sent = false; | |
731 | #endif | |
26ac0430 | 732 | |
c1520b67 AJ |
733 | for (HttpRequestMethod m(METHOD_NONE); m != METHOD_ENUM_END; ++m) { |
734 | if (m.isCacheble()) { | |
735 | if (StoreEntry *entry = storeGetPublic(url, m)) { | |
736 | debugs(88, 5, "purging " << RequestMethodStr(m) << ' ' << url); | |
90bd689c | 737 | #if USE_HTCP |
8dceeee3 BR |
738 | neighborsHtcpClear(entry, url, req, m, HTCP_CLR_INVALIDATION); |
739 | if (m == METHOD_GET || m == METHOD_HEAD) { | |
740 | get_or_head_sent = true; | |
741 | } | |
90bd689c | 742 | #endif |
8dceeee3 | 743 | entry->release(); |
c1520b67 AJ |
744 | } |
745 | } | |
746 | } | |
8dceeee3 BR |
747 | |
748 | #if USE_HTCP | |
749 | if (!get_or_head_sent) { | |
750 | neighborsHtcpClear(NULL, url, req, HttpRequestMethod(METHOD_GET), HTCP_CLR_INVALIDATION); | |
751 | } | |
752 | #endif | |
c1520b67 AJ |
753 | } |
754 | ||
26ac0430 | 755 | void |
60745f24 | 756 | clientReplyContext::purgeAllCached() |
757 | { | |
26ac0430 | 758 | const char *url = urlCanonical(http->request); |
90bd689c | 759 | purgeEntriesByUrl(http->request, url); |
35ececa5 | 760 | } |
60745f24 | 761 | |
e6ccf245 | 762 | void |
3b13a8fd | 763 | clientReplyContext::created(StoreEntry *newEntry) |
e6ccf245 | 764 | { |
765 | if (lookingforstore == 1) | |
62e76326 | 766 | purgeFoundGet(newEntry); |
e6ccf245 | 767 | else if (lookingforstore == 2) |
62e76326 | 768 | purgeFoundHead(newEntry); |
e6ccf245 | 769 | else if (lookingforstore == 3) |
62e76326 | 770 | purgeDoPurgeGet(newEntry); |
e6ccf245 | 771 | else if (lookingforstore == 4) |
62e76326 | 772 | purgeDoPurgeHead(newEntry); |
e6ccf245 | 773 | else if (lookingforstore == 5) |
62e76326 | 774 | identifyFoundObject(newEntry); |
e6ccf245 | 775 | } |
776 | ||
777 | void | |
3b13a8fd | 778 | clientReplyContext::purgeFoundGet(StoreEntry *newEntry) |
e6ccf245 | 779 | { |
780 | if (newEntry->isNull()) { | |
62e76326 | 781 | lookingforstore = 2; |
782 | StoreEntry::getPublicByRequestMethod(this, http->request, METHOD_HEAD); | |
e6ccf245 | 783 | } else |
62e76326 | 784 | purgeFoundObject (newEntry); |
e6ccf245 | 785 | } |
786 | ||
787 | void | |
3b13a8fd | 788 | clientReplyContext::purgeFoundHead(StoreEntry *newEntry) |
e6ccf245 | 789 | { |
790 | if (newEntry->isNull()) | |
62e76326 | 791 | purgeDoMissPurge(); |
e6ccf245 | 792 | else |
62e76326 | 793 | purgeFoundObject (newEntry); |
e6ccf245 | 794 | } |
62e76326 | 795 | |
e6ccf245 | 796 | void |
3b13a8fd | 797 | clientReplyContext::purgeFoundObject(StoreEntry *entry) |
e6ccf245 | 798 | { |
799 | assert (entry && !entry->isNull()); | |
e4b9a2f0 | 800 | |
801 | if (EBIT_TEST(entry->flags, ENTRY_SPECIAL)) { | |
802 | http->logType = LOG_TCP_DENIED; | |
cc192b50 | 803 | ErrorState *err = clientBuildError(ERR_ACCESS_DENIED, HTTP_FORBIDDEN, NULL, http->getConn()->peer, http->request); |
e4b9a2f0 | 804 | startError(err); |
805 | return; | |
806 | } | |
807 | ||
8bcf08e0 | 808 | StoreIOBuffer localTempBuffer; |
62e76326 | 809 | /* Swap in the metadata */ |
86a2f789 | 810 | http->storeEntry(entry); |
34266cde | 811 | |
3d0ac046 | 812 | http->storeEntry()->lock(); |
3900307b | 813 | http->storeEntry()->createMemObject(http->uri, http->log_uri); |
34266cde | 814 | |
86a2f789 | 815 | http->storeEntry()->mem_obj->method = http->request->method; |
34266cde | 816 | |
86a2f789 | 817 | sc = storeClientListAdd(http->storeEntry(), this); |
34266cde | 818 | |
62e76326 | 819 | http->logType = LOG_TCP_HIT; |
34266cde | 820 | |
62e76326 | 821 | reqofs = 0; |
34266cde | 822 | |
8bcf08e0 | 823 | localTempBuffer.offset = http->out.offset; |
34266cde | 824 | |
8bcf08e0 | 825 | localTempBuffer.length = next()->readBuffer.length; |
34266cde | 826 | |
8bcf08e0 | 827 | localTempBuffer.data = next()->readBuffer.data; |
34266cde | 828 | |
86a2f789 | 829 | storeClientCopy(sc, http->storeEntry(), |
8bcf08e0 | 830 | localTempBuffer, CacheHit, this); |
e6ccf245 | 831 | } |
832 | ||
833 | void | |
834 | clientReplyContext::purgeRequest() | |
edce4d98 | 835 | { |
bf8fe701 | 836 | debugs(88, 3, "Config2.onoff.enable_purge = " << |
837 | Config2.onoff.enable_purge); | |
62e76326 | 838 | |
edce4d98 | 839 | if (!Config2.onoff.enable_purge) { |
62e76326 | 840 | http->logType = LOG_TCP_DENIED; |
cc192b50 | 841 | ErrorState *err = clientBuildError(ERR_ACCESS_DENIED, HTTP_FORBIDDEN, NULL, http->getConn()->peer, http->request); |
0655fa4d | 842 | startError(err); |
62e76326 | 843 | return; |
edce4d98 | 844 | } |
62e76326 | 845 | |
edce4d98 | 846 | /* Release both IP cache */ |
cc192b50 | 847 | ipcacheInvalidate(http->request->GetHost()); |
edce4d98 | 848 | |
e6ccf245 | 849 | if (!http->flags.purging) |
62e76326 | 850 | purgeRequestFindObjectToPurge(); |
e6ccf245 | 851 | else |
62e76326 | 852 | purgeDoMissPurge(); |
e6ccf245 | 853 | } |
854 | ||
855 | void | |
856 | clientReplyContext::purgeDoMissPurge() | |
857 | { | |
29b8d8d6 | 858 | http->logType = LOG_TCP_MISS; |
e6ccf245 | 859 | lookingforstore = 3; |
3b13a8fd | 860 | StoreEntry::getPublicByRequestMethod(this,http->request, METHOD_GET); |
e6ccf245 | 861 | } |
862 | ||
863 | void | |
3b13a8fd | 864 | clientReplyContext::purgeDoPurgeGet(StoreEntry *newEntry) |
e6ccf245 | 865 | { |
866 | assert (newEntry); | |
867 | /* Move to new() when that is created */ | |
868 | purgeStatus = HTTP_NOT_FOUND; | |
869 | ||
870 | if (!newEntry->isNull()) { | |
62e76326 | 871 | /* Release the cached URI */ |
bf8fe701 | 872 | debugs(88, 4, "clientPurgeRequest: GET '" << newEntry->url() << "'" ); |
8dceeee3 BR |
873 | #if USE_HTCP |
874 | neighborsHtcpClear(newEntry, NULL, http->request, HttpRequestMethod(METHOD_GET), HTCP_CLR_PURGE); | |
875 | #endif | |
5f33b71d | 876 | newEntry->release(); |
62e76326 | 877 | purgeStatus = HTTP_OK; |
edce4d98 | 878 | } |
62e76326 | 879 | |
e6ccf245 | 880 | lookingforstore = 4; |
3b13a8fd | 881 | StoreEntry::getPublicByRequestMethod(this, http->request, METHOD_HEAD); |
e6ccf245 | 882 | } |
883 | ||
884 | void | |
3b13a8fd | 885 | clientReplyContext::purgeDoPurgeHead(StoreEntry *newEntry) |
e6ccf245 | 886 | { |
4fc0ac76 | 887 | if (newEntry && !newEntry->isNull()) { |
bf8fe701 | 888 | debugs(88, 4, "clientPurgeRequest: HEAD '" << newEntry->url() << "'" ); |
8dceeee3 BR |
889 | #if USE_HTCP |
890 | neighborsHtcpClear(newEntry, NULL, http->request, HttpRequestMethod(METHOD_HEAD), HTCP_CLR_PURGE); | |
891 | #endif | |
5f33b71d | 892 | newEntry->release(); |
62e76326 | 893 | purgeStatus = HTTP_OK; |
edce4d98 | 894 | } |
62e76326 | 895 | |
edce4d98 | 896 | /* And for Vary, release the base URI if none of the headers was included in the request */ |
62e76326 | 897 | |
edce4d98 | 898 | if (http->request->vary_headers |
62e76326 | 899 | && !strstr(http->request->vary_headers, "=")) { |
900 | StoreEntry *entry = storeGetPublic(urlCanonical(http->request), METHOD_GET); | |
901 | ||
902 | if (entry) { | |
bf8fe701 | 903 | debugs(88, 4, "clientPurgeRequest: Vary GET '" << entry->url() << "'" ); |
8dceeee3 BR |
904 | #if USE_HTCP |
905 | neighborsHtcpClear(entry, NULL, http->request, HttpRequestMethod(METHOD_GET), HTCP_CLR_PURGE); | |
906 | #endif | |
5f33b71d | 907 | entry->release(); |
62e76326 | 908 | purgeStatus = HTTP_OK; |
909 | } | |
910 | ||
911 | entry = storeGetPublic(urlCanonical(http->request), METHOD_HEAD); | |
912 | ||
913 | if (entry) { | |
bf8fe701 | 914 | debugs(88, 4, "clientPurgeRequest: Vary HEAD '" << entry->url() << "'" ); |
8dceeee3 BR |
915 | #if USE_HTCP |
916 | neighborsHtcpClear(entry, NULL, http->request, HttpRequestMethod(METHOD_HEAD), HTCP_CLR_PURGE); | |
917 | #endif | |
5f33b71d | 918 | entry->release(); |
62e76326 | 919 | purgeStatus = HTTP_OK; |
920 | } | |
edce4d98 | 921 | } |
62e76326 | 922 | |
edce4d98 | 923 | /* |
924 | * Make a new entry to hold the reply to be written | |
925 | * to the client. | |
926 | */ | |
528b2c61 | 927 | /* FIXME: This doesn't need to go through the store. Simply |
928 | * push down the client chain | |
929 | */ | |
0655fa4d | 930 | createStoreEntry(http->request->method, request_flags()); |
62e76326 | 931 | |
0655fa4d | 932 | triggerInitialStoreRead(); |
62e76326 | 933 | |
7dc5f514 | 934 | HttpReply *rep = new HttpReply; |
11992b6f | 935 | rep->setHeaders(purgeStatus, NULL, NULL, 0, 0, -1); |
7dc5f514 | 936 | http->storeEntry()->replaceHttpReply(rep); |
86a2f789 | 937 | http->storeEntry()->complete(); |
edce4d98 | 938 | } |
939 | ||
940 | void | |
0655fa4d | 941 | clientReplyContext::traceReply(clientStreamNode * node) |
edce4d98 | 942 | { |
076df709 | 943 | clientStreamNode *nextNode = (clientStreamNode *)node->node.next->data; |
8bcf08e0 | 944 | StoreIOBuffer localTempBuffer; |
0655fa4d | 945 | assert(http->request->max_forwards == 0); |
946 | createStoreEntry(http->request->method, request_flags()); | |
076df709 FC |
947 | localTempBuffer.offset = nextNode->readBuffer.offset + headers_sz; |
948 | localTempBuffer.length = nextNode->readBuffer.length; | |
949 | localTempBuffer.data = nextNode->readBuffer.data; | |
86a2f789 | 950 | storeClientCopy(sc, http->storeEntry(), |
8bcf08e0 | 951 | localTempBuffer, SendMoreData, this); |
d88e3c49 | 952 | http->storeEntry()->releaseRequest(); |
3900307b | 953 | http->storeEntry()->buffer(); |
7dc5f514 | 954 | HttpReply *rep = new HttpReply; |
11992b6f | 955 | rep->setHeaders(HTTP_OK, NULL, "text/plain", http->request->prefixLen(), 0, squid_curtime); |
db237875 | 956 | http->storeEntry()->replaceHttpReply(rep); |
5cafad19 | 957 | http->request->swapOut(http->storeEntry()); |
86a2f789 | 958 | http->storeEntry()->complete(); |
edce4d98 | 959 | } |
960 | ||
961 | #define SENDING_BODY 0 | |
962 | #define SENDING_HDRSONLY 1 | |
963 | int | |
0655fa4d | 964 | clientReplyContext::checkTransferDone() |
edce4d98 | 965 | { |
86a2f789 | 966 | StoreEntry *entry = http->storeEntry(); |
62e76326 | 967 | |
edce4d98 | 968 | if (entry == NULL) |
62e76326 | 969 | return 0; |
970 | ||
971 | /* | |
edce4d98 | 972 | * For now, 'done_copying' is used for special cases like |
973 | * Range and HEAD requests. | |
974 | */ | |
0655fa4d | 975 | if (http->flags.done_copying) |
62e76326 | 976 | return 1; |
977 | ||
4ad60609 AR |
978 | if (http->request->flags.chunked_reply && !flags.complete) { |
979 | // last-chunk was not sent | |
980 | return 0; | |
981 | } | |
982 | ||
edce4d98 | 983 | /* |
984 | * Handle STORE_OK objects. | |
985 | * objectLen(entry) will be set proprely. | |
26ac0430 | 986 | * RC: Does objectLen(entry) include the Headers? |
0e3be1ea | 987 | * RC: Yes. |
edce4d98 | 988 | */ |
989 | if (entry->store_status == STORE_OK) { | |
0655fa4d | 990 | return storeOKTransferDone(); |
e39b9382 | 991 | } else { |
0655fa4d | 992 | return storeNotOKTransferDone(); |
edce4d98 | 993 | } |
e39b9382 | 994 | } |
995 | ||
996 | int | |
997 | clientReplyContext::storeOKTransferDone() const | |
998 | { | |
47f6e231 | 999 | if (http->out.offset >= http->storeEntry()->objectLen() - headers_sz) { |
26ac0430 AJ |
1000 | debugs(88,3,HERE << "storeOKTransferDone " << |
1001 | " out.offset=" << http->out.offset << | |
1002 | " objectLen()=" << http->storeEntry()->objectLen() << | |
1003 | " headers_sz=" << headers_sz); | |
62e76326 | 1004 | return 1; |
47f6e231 | 1005 | } |
62e76326 | 1006 | |
e39b9382 | 1007 | return 0; |
1008 | } | |
1009 | ||
1010 | int | |
1011 | clientReplyContext::storeNotOKTransferDone() const | |
1012 | { | |
edce4d98 | 1013 | /* |
1014 | * Now, handle STORE_PENDING objects | |
1015 | */ | |
86a2f789 | 1016 | MemObject *mem = http->storeEntry()->mem_obj; |
edce4d98 | 1017 | assert(mem != NULL); |
1018 | assert(http->request != NULL); | |
0e3be1ea | 1019 | /* mem->reply was wrong because it uses the UPSTREAM header length!!! */ |
8bcf08e0 | 1020 | HttpReply const *curReply = mem->getReply(); |
62e76326 | 1021 | |
e39b9382 | 1022 | if (headers_sz == 0) |
62e76326 | 1023 | /* haven't found end of headers yet */ |
1024 | return 0; | |
e39b9382 | 1025 | |
1026 | int sending = SENDING_BODY; | |
62e76326 | 1027 | |
8bcf08e0 FC |
1028 | if (curReply->sline.status == HTTP_NO_CONTENT || |
1029 | curReply->sline.status == HTTP_NOT_MODIFIED || | |
1030 | curReply->sline.status < HTTP_OK || | |
62e76326 | 1031 | http->request->method == METHOD_HEAD) |
1032 | sending = SENDING_HDRSONLY; | |
1033 | ||
edce4d98 | 1034 | /* |
1035 | * Figure out how much data we are supposed to send. | |
1036 | * If we are sending a body and we don't have a content-length, | |
1037 | * then we must wait for the object to become STORE_OK. | |
1038 | */ | |
8bcf08e0 | 1039 | if (curReply->content_length < 0) |
62e76326 | 1040 | return 0; |
e39b9382 | 1041 | |
8bcf08e0 | 1042 | int64_t expectedLength = curReply->content_length + http->out.headers_sz; |
62e76326 | 1043 | |
e39b9382 | 1044 | if (http->out.size < expectedLength) |
62e76326 | 1045 | return 0; |
47f6e231 | 1046 | else { |
26ac0430 AJ |
1047 | debugs(88,3,HERE << "storeNotOKTransferDone " << |
1048 | " out.size=" << http->out.size << | |
1049 | " expectedLength=" << expectedLength); | |
62e76326 | 1050 | return 1; |
47f6e231 | 1051 | } |
edce4d98 | 1052 | } |
1053 | ||
1054 | ||
edce4d98 | 1055 | /* A write has completed, what is the next status based on the |
1056 | * canonical request data? | |
1057 | * 1 something is wrong | |
1058 | * 0 nothing is wrong. | |
1059 | * | |
1060 | */ | |
1061 | int | |
59a1efb2 | 1062 | clientHttpRequestStatus(int fd, ClientHttpRequest const *http) |
edce4d98 | 1063 | { |
062f7f4e FC |
1064 | #if SIZEOF_INT64_T == 4 |
1065 | if (http->out.size > 0x7FFF0000) { | |
1066 | debugs(88, 1, "WARNING: closing FD " << fd << " to prevent out.size counter overflow"); | |
1067 | debugs(88, 1, "\tclient " << http->getConn()->peer); | |
1068 | debugs(88, 1, "\treceived " << http->out.size << " bytes"); | |
1069 | debugs(88, 1, "\tURI " << http->log_uri); | |
1070 | return 1; | |
1071 | } | |
1072 | ||
1073 | if (http->out.offset > 0x7FFF0000) { | |
1074 | debugs(88, 1, "WARNING: closing FD " << fd < " to prevent out.offset counter overflow"); | |
1075 | debugs(88, 1, "\tclient " << http->getConn()->peer); | |
1076 | debugs(88, 1, "\treceived " << http->out.size << " bytes, offset " << http->out.offset); | |
1077 | debugs(88, 1, "\tURI " << http->log_uri); | |
1078 | return 1; | |
1079 | } | |
1080 | ||
1081 | #endif | |
edce4d98 | 1082 | return 0; |
1083 | } | |
1084 | ||
62e76326 | 1085 | /* Preconditions: |
edce4d98 | 1086 | * *http is a valid structure. |
1087 | * fd is either -1, or an open fd. | |
1088 | * | |
1089 | * TODO: enumify this | |
1090 | * | |
1091 | * This function is used by any http request sink, to determine the status | |
1092 | * of the object. | |
1093 | */ | |
1094 | clientStream_status_t | |
59a1efb2 | 1095 | clientReplyStatus(clientStreamNode * aNode, ClientHttpRequest * http) |
edce4d98 | 1096 | { |
0655fa4d | 1097 | clientReplyContext *context = dynamic_cast<clientReplyContext *>(aNode->data.getRaw()); |
1098 | assert (context); | |
1099 | assert (context->http == http); | |
1100 | return context->replyStatus(); | |
1101 | } | |
1102 | ||
1103 | clientStream_status_t | |
1104 | clientReplyContext::replyStatus() | |
1105 | { | |
edce4d98 | 1106 | int done; |
1107 | /* Here because lower nodes don't need it */ | |
62e76326 | 1108 | |
3daaed1a | 1109 | if (http->storeEntry() == NULL) { |
1110 | debugs(88, 5, "clientReplyStatus: no storeEntry"); | |
62e76326 | 1111 | return STREAM_FAILED; /* yuck, but what can we do? */ |
3daaed1a | 1112 | } |
62e76326 | 1113 | |
3daaed1a | 1114 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) { |
62e76326 | 1115 | /* TODO: Could upstream read errors (result.flags.error) be |
1116 | * lost, and result in undersize requests being considered | |
1117 | * complete. Should we tcp reset such connections ? | |
1118 | */ | |
3daaed1a | 1119 | debugs(88, 5, "clientReplyStatus: aborted storeEntry"); |
62e76326 | 1120 | return STREAM_FAILED; |
3daaed1a | 1121 | } |
62e76326 | 1122 | |
0655fa4d | 1123 | if ((done = checkTransferDone()) != 0 || flags.complete) { |
bf8fe701 | 1124 | debugs(88, 5, "clientReplyStatus: transfer is DONE"); |
62e76326 | 1125 | /* Ok we're finished, but how? */ |
1126 | ||
4ad60609 AR |
1127 | const int64_t expectedBodySize = |
1128 | http->storeEntry()->getReply()->bodySize(http->request->method); | |
1129 | if (!http->request->flags.proxy_keepalive && expectedBodySize < 0) { | |
bf8fe701 | 1130 | debugs(88, 5, "clientReplyStatus: closing, content_length < 0"); |
62e76326 | 1131 | return STREAM_FAILED; |
1132 | } | |
1133 | ||
1134 | if (!done) { | |
bf8fe701 | 1135 | debugs(88, 5, "clientReplyStatus: closing, !done, but read 0 bytes"); |
62e76326 | 1136 | return STREAM_FAILED; |
1137 | } | |
1138 | ||
4ad60609 | 1139 | if (expectedBodySize >= 0 && !http->gotEnough()) { |
bf8fe701 | 1140 | debugs(88, 5, "clientReplyStatus: client didn't get all it expected"); |
62e76326 | 1141 | return STREAM_UNPLANNED_COMPLETE; |
1142 | } | |
1143 | ||
1144 | if (http->request->flags.proxy_keepalive) { | |
bf8fe701 | 1145 | debugs(88, 5, "clientReplyStatus: stream complete and can keepalive"); |
62e76326 | 1146 | return STREAM_COMPLETE; |
1147 | } | |
1148 | ||
bf8fe701 | 1149 | debugs(88, 5, "clientReplyStatus: stream was not expected to complete!"); |
62e76326 | 1150 | return STREAM_UNPLANNED_COMPLETE; |
edce4d98 | 1151 | } |
62e76326 | 1152 | |
16611143 | 1153 | // XXX: Should this be checked earlier? We could return above w/o checking. |
1154 | if (reply->receivedBodyTooLarge(*http->request, http->out.offset - 4096)) { | |
b51aec66 | 1155 | /* 4096 is a margin for the HTTP headers included in out.offset */ |
bf8fe701 | 1156 | debugs(88, 5, "clientReplyStatus: client reply body is too large"); |
62e76326 | 1157 | return STREAM_FAILED; |
0e3be1ea | 1158 | } |
62e76326 | 1159 | |
edce4d98 | 1160 | return STREAM_NONE; |
1161 | } | |
1162 | ||
62e76326 | 1163 | /* Responses with no body will not have a content-type header, |
edce4d98 | 1164 | * which breaks the rep_mime_type acl, which |
1165 | * coincidentally, is the most common acl for reply access lists. | |
1166 | * A better long term fix for this is to allow acl matchs on the various | |
26ac0430 AJ |
1167 | * status codes, and then supply a default ruleset that puts these |
1168 | * codes before any user defines access entries. That way the user | |
edce4d98 | 1169 | * can choose to block these responses where appropriate, but won't get |
1170 | * mysterious breakages. | |
1171 | */ | |
0655fa4d | 1172 | bool |
1173 | clientReplyContext::alwaysAllowResponse(http_status sline) const | |
edce4d98 | 1174 | { |
4ef4b952 | 1175 | bool result; |
1176 | ||
edce4d98 | 1177 | switch (sline) { |
62e76326 | 1178 | |
edce4d98 | 1179 | case HTTP_CONTINUE: |
62e76326 | 1180 | |
edce4d98 | 1181 | case HTTP_SWITCHING_PROTOCOLS: |
62e76326 | 1182 | |
edce4d98 | 1183 | case HTTP_PROCESSING: |
62e76326 | 1184 | |
edce4d98 | 1185 | case HTTP_NO_CONTENT: |
62e76326 | 1186 | |
edce4d98 | 1187 | case HTTP_NOT_MODIFIED: |
4ef4b952 | 1188 | result = true; |
62e76326 | 1189 | break; |
1190 | ||
edce4d98 | 1191 | default: |
4ef4b952 | 1192 | result = false; |
edce4d98 | 1193 | } |
4ef4b952 | 1194 | |
1195 | return result; | |
edce4d98 | 1196 | } |
1197 | ||
a5c8d64d AJ |
1198 | /** |
1199 | * Generate the reply headers sent to client. | |
1200 | * | |
1201 | * Filters out unwanted entries and hop-by-hop from original reply header | |
1202 | * then adds extra entries if we have more info than origin server | |
1203 | * then adds Squid specific entries | |
edce4d98 | 1204 | */ |
0655fa4d | 1205 | void |
1206 | clientReplyContext::buildReplyHeader() | |
edce4d98 | 1207 | { |
7dc5f514 | 1208 | HttpHeader *hdr = &reply->header; |
c8be6d7b | 1209 | int is_hit = logTypeIsATcpHit(http->logType); |
190154cf | 1210 | HttpRequest *request = http->request; |
edce4d98 | 1211 | #if DONT_FILTER_THESE |
1212 | /* but you might want to if you run Squid as an HTTP accelerator */ | |
a9925b40 | 1213 | /* hdr->delById(HDR_ACCEPT_RANGES); */ |
1214 | hdr->delById(HDR_ETAG); | |
edce4d98 | 1215 | #endif |
62e76326 | 1216 | |
edce4d98 | 1217 | if (is_hit) |
a9925b40 | 1218 | hdr->delById(HDR_SET_COOKIE); |
62e76326 | 1219 | |
26ac0430 | 1220 | // if there is not configured a peer proxy with login=PASS option enabled |
dcf3665b AJ |
1221 | // remove the Proxy-Authenticate header |
1222 | if ( !(request->peer_login && strcmp(request->peer_login,"PASS") ==0)) | |
26ac0430 | 1223 | reply->header.delById(HDR_PROXY_AUTHENTICATE); |
dcf3665b | 1224 | |
2cdeea82 | 1225 | reply->header.removeHopByHopEntries(); |
62e76326 | 1226 | |
1227 | // if (request->range) | |
7dc5f514 | 1228 | // clientBuildRangeHeader(http, reply); |
a5c8d64d | 1229 | |
edce4d98 | 1230 | /* |
1231 | * Add a estimated Age header on cache hits. | |
1232 | */ | |
1233 | if (is_hit) { | |
62e76326 | 1234 | /* |
1235 | * Remove any existing Age header sent by upstream caches | |
1236 | * (note that the existing header is passed along unmodified | |
1237 | * on cache misses) | |
1238 | */ | |
a9925b40 | 1239 | hdr->delById(HDR_AGE); |
62e76326 | 1240 | /* |
1241 | * This adds the calculated object age. Note that the details of the | |
1242 | * age calculation is performed by adjusting the timestamp in | |
3900307b | 1243 | * StoreEntry::timestampsSet(), not here. |
62e76326 | 1244 | * |
1245 | * BROWSER WORKAROUND: IE sometimes hangs when receiving a 0 Age | |
1246 | * header, so don't use it unless there is a age to report. Please | |
1247 | * note that Age is only used to make a conservative estimation of | |
1248 | * the objects age, so a Age: 0 header does not add any useful | |
1249 | * information to the reply in any case. | |
1250 | */ | |
a5c8d64d AJ |
1251 | #if DEAD_CODE |
1252 | // XXX: realy useless? or is there a bug now that this is detatched from the below if-sequence ? | |
1253 | // looks like this pre-if was supposed to be the browser workaround... | |
86a2f789 | 1254 | if (NULL == http->storeEntry()) |
62e76326 | 1255 | (void) 0; |
86a2f789 | 1256 | else if (http->storeEntry()->timestamp < 0) |
62e76326 | 1257 | (void) 0; |
a5c8d64d | 1258 | #endif |
bbe58ab5 | 1259 | |
1260 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_SPECIAL)) { | |
a9925b40 | 1261 | hdr->delById(HDR_DATE); |
1262 | hdr->insertTime(HDR_DATE, squid_curtime); | |
bbe58ab5 | 1263 | } else if (http->storeEntry()->timestamp < squid_curtime) { |
a9925b40 | 1264 | hdr->putInt(HDR_AGE, |
1265 | squid_curtime - http->storeEntry()->timestamp); | |
62e76326 | 1266 | /* Signal old objects. NB: rfc 2616 is not clear, |
1267 | * by implication, on whether we should do this to all | |
1268 | * responses, or only cache hits. | |
1269 | * 14.46 states it ONLY applys for heuristically caclulated | |
1270 | * freshness values, 13.2.4 doesn't specify the same limitation. | |
1271 | * We interpret RFC 2616 under the combination. | |
1272 | */ | |
1273 | /* TODO: if maxage or s-maxage is present, don't do this */ | |
1274 | ||
86a2f789 | 1275 | if (squid_curtime - http->storeEntry()->timestamp >= 86400) { |
8bcf08e0 FC |
1276 | char tbuf[512]; |
1277 | snprintf (tbuf, sizeof(tbuf), "%s %s %s", | |
62e76326 | 1278 | "113", ThisCache, |
1279 | "This cache hit is still fresh and more than 1 day old"); | |
8bcf08e0 | 1280 | hdr->putStr(HDR_WARNING, tbuf); |
62e76326 | 1281 | } |
1282 | } | |
a5c8d64d | 1283 | } |
528b2c61 | 1284 | |
a5c8d64d AJ |
1285 | /* RFC 2616: Section 14.18 |
1286 | * | |
1287 | * Add a Date: header if missing. | |
1288 | * We have access to a clock therefore are required to amend any shortcoming in servers. | |
1289 | * | |
1290 | * NP: done after Age: to prevent ENTRY_SPECIAL double-handling this header. | |
1291 | */ | |
1292 | if ( !hdr->has(HDR_DATE) ) { | |
f0dedeb5 | 1293 | if (!http->storeEntry()) |
a5c8d64d | 1294 | hdr->insertTime(HDR_DATE, squid_curtime); |
f0dedeb5 AJ |
1295 | else if (http->storeEntry()->timestamp > 0) |
1296 | hdr->insertTime(HDR_DATE, http->storeEntry()->timestamp); | |
1297 | else { | |
1298 | debugs(88,1,"WARNING: An error inside Squid has caused an HTTP reply without Date:. Please report this"); | |
1299 | /* TODO: dump something useful about the problem */ | |
1300 | } | |
edce4d98 | 1301 | } |
62e76326 | 1302 | |
0bd9aa82 | 1303 | /* Filter unproxyable authentication types */ |
dcf3665b | 1304 | |
ddd31ed3 | 1305 | if (http->logType != LOG_TCP_DENIED && |
d67acb4e | 1306 | hdr->has(HDR_WWW_AUTHENTICATE)) { |
62e76326 | 1307 | HttpHeaderPos pos = HttpHeaderInitPos; |
1308 | HttpHeaderEntry *e; | |
1309 | ||
26ac0430 | 1310 | int connection_auth_blocked = 0; |
a9925b40 | 1311 | while ((e = hdr->getEntry(&pos))) { |
d67acb4e | 1312 | if (e->id == HDR_WWW_AUTHENTICATE) { |
5b4117d8 | 1313 | const char *value = e->value.rawBuf(); |
62e76326 | 1314 | |
1315 | if ((strncasecmp(value, "NTLM", 4) == 0 && | |
1316 | (value[4] == '\0' || value[4] == ' ')) | |
1317 | || | |
1318 | (strncasecmp(value, "Negotiate", 9) == 0 && | |
d67acb4e | 1319 | (value[9] == '\0' || value[9] == ' ')) |
26ac0430 AJ |
1320 | || |
1321 | (strncasecmp(value, "Kerberos", 8) == 0 && | |
1322 | (value[8] == '\0' || value[8] == ' '))) { | |
1323 | if (request->flags.connection_auth_disabled) { | |
1324 | hdr->delAt(pos, connection_auth_blocked); | |
d67acb4e AJ |
1325 | continue; |
1326 | } | |
26ac0430 AJ |
1327 | request->flags.must_keepalive = 1; |
1328 | if (!request->flags.accelerated && !request->flags.intercepted) { | |
d67acb4e | 1329 | httpHeaderPutStrf(hdr, HDR_PROXY_SUPPORT, "Session-Based-Authentication"); |
26ac0430 AJ |
1330 | /* |
1331 | We send "[Proxy-]Connection: Proxy-Support" header to mark | |
1332 | Proxy-Support as a hop-by-hop header for intermediaries that do not | |
1333 | understand the semantics of this header. The RFC should have included | |
1334 | this recommendation. | |
1335 | */ | |
d67acb4e AJ |
1336 | httpHeaderPutStrf(hdr, HDR_CONNECTION, "Proxy-support"); |
1337 | } | |
1338 | break; | |
26ac0430 | 1339 | } |
62e76326 | 1340 | } |
1341 | } | |
d67acb4e AJ |
1342 | |
1343 | if (connection_auth_blocked) | |
ba9fb01d | 1344 | hdr->refreshMask(); |
0bd9aa82 | 1345 | } |
62e76326 | 1346 | |
edce4d98 | 1347 | /* Handle authentication headers */ |
26ac0430 AJ |
1348 | if (http->logType == LOG_TCP_DENIED && |
1349 | ( reply->sline.status == HTTP_PROXY_AUTHENTICATION_REQUIRED || | |
1350 | reply->sline.status == HTTP_UNAUTHORIZED) | |
1351 | ) { | |
1352 | /* Add authentication header */ | |
1353 | /*! \todo alter errorstate to be accel on|off aware. The 0 on the next line | |
1354 | * depends on authenticate behaviour: all schemes to date send no extra | |
1355 | * data on 407/401 responses, and do not check the accel state on 401/407 | |
1356 | * responses | |
1357 | */ | |
1358 | authenticateFixHeader(reply, request->auth_user_request, request, 0, 1); | |
a33a428a AJ |
1359 | } else if (request->auth_user_request != NULL) |
1360 | authenticateFixHeader(reply, request->auth_user_request, request, http->flags.accel, 0); | |
62e76326 | 1361 | |
edce4d98 | 1362 | /* Append X-Cache */ |
1363 | httpHeaderPutStrf(hdr, HDR_X_CACHE, "%s from %s", | |
62e76326 | 1364 | is_hit ? "HIT" : "MISS", getMyHostname()); |
1365 | ||
edce4d98 | 1366 | #if USE_CACHE_DIGESTS |
1367 | /* Append X-Cache-Lookup: -- temporary hack, to be removed @?@ @?@ */ | |
1368 | httpHeaderPutStrf(hdr, HDR_X_CACHE_LOOKUP, "%s from %s:%d", | |
0655fa4d | 1369 | lookup_type ? lookup_type : "NONE", |
62e76326 | 1370 | getMyHostname(), getMyPort()); |
1371 | ||
edce4d98 | 1372 | #endif |
62e76326 | 1373 | |
4ad60609 | 1374 | const bool maySendChunkedReply = !request->multipartRangeRequest() && |
4cb2536f | 1375 | (request->http_ver >= HttpVersion(1, 1)); |
4ad60609 | 1376 | |
f529bb20 | 1377 | /* Check whether we should send keep-alive */ |
58850d15 | 1378 | if (!Config.onoff.error_pconns && reply->sline.status >= 400 && !request->flags.must_keepalive) { |
bf8fe701 | 1379 | debugs(33, 3, "clientBuildReplyHeader: Error, don't keep-alive"); |
58850d15 | 1380 | request->flags.proxy_keepalive = 0; |
af6a12ee | 1381 | } else if (!Config.onoff.client_pconns && !request->flags.must_keepalive) { |
17b57873 | 1382 | debugs(33, 2, "clientBuildReplyHeader: Connection Keep-Alive not requested by admin or client"); |
f5e45ad8 | 1383 | request->flags.proxy_keepalive = 0; |
af6a12ee | 1384 | } else if (request->flags.proxy_keepalive && shutting_down) { |
f529bb20 | 1385 | debugs(88, 3, "clientBuildReplyHeader: Shutting down, don't keep-alive."); |
1386 | request->flags.proxy_keepalive = 0; | |
af6a12ee | 1387 | } else if (request->flags.connection_auth && !reply->keep_alive) { |
26ac0430 AJ |
1388 | debugs(33, 2, "clientBuildReplyHeader: Connection oriented auth but server side non-persistent"); |
1389 | request->flags.proxy_keepalive = 0; | |
4ad60609 | 1390 | } else if (reply->bodySize(request->method) < 0 && !maySendChunkedReply) { |
17b57873 AJ |
1391 | debugs(88, 3, "clientBuildReplyHeader: can't keep-alive, unknown body size" ); |
1392 | request->flags.proxy_keepalive = 0; | |
af6a12ee | 1393 | } else if (fdUsageHigh()&& !request->flags.must_keepalive) { |
17b57873 AJ |
1394 | debugs(88, 3, "clientBuildReplyHeader: Not many unused FDs, can't keep-alive"); |
1395 | request->flags.proxy_keepalive = 0; | |
1396 | } | |
d67acb4e | 1397 | |
4ad60609 AR |
1398 | // Decide if we send chunked reply |
1399 | if (maySendChunkedReply && | |
4cb2536f A |
1400 | request->flags.proxy_keepalive && |
1401 | reply->bodySize(request->method) < 0) { | |
4ad60609 AR |
1402 | debugs(88, 3, "clientBuildReplyHeader: chunked reply"); |
1403 | request->flags.chunked_reply = 1; | |
1404 | hdr->putStr(HDR_TRANSFER_ENCODING, "chunked"); | |
1405 | } | |
f529bb20 | 1406 | |
4dea3fdd | 1407 | /* Append VIA */ |
92caea77 | 1408 | if (Config.onoff.via) { |
62e76326 | 1409 | LOCAL_ARRAY(char, bbuf, MAX_URL + 32); |
30abd221 | 1410 | String strVia; |
26ac0430 | 1411 | hdr->getList(HDR_VIA, &strVia); |
88331887 | 1412 | snprintf(bbuf, MAX_URL + 32, "%d.%d %s", |
7dc5f514 | 1413 | reply->sline.version.major, |
1414 | reply->sline.version.minor, | |
62e76326 | 1415 | ThisCache); |
1416 | strListAdd(&strVia, bbuf, ','); | |
a9925b40 | 1417 | hdr->delById(HDR_VIA); |
5b4117d8 | 1418 | hdr->putStr(HDR_VIA, strVia.termedBuf()); |
c8be6d7b | 1419 | } |
95e78500 AJ |
1420 | /* Signal keep-alive or close explicitly */ |
1421 | hdr->putStr(HDR_CONNECTION, request->flags.proxy_keepalive ? "keep-alive" : "close"); | |
62e76326 | 1422 | |
edce4d98 | 1423 | #if ADD_X_REQUEST_URI |
1424 | /* | |
1425 | * Knowing the URI of the request is useful when debugging persistent | |
1426 | * connections in a client; we cannot guarantee the order of http headers, | |
1427 | * but X-Request-URI is likely to be the very last header to ease use from a | |
1428 | * debugger [hdr->entries.count-1]. | |
1429 | */ | |
a9925b40 | 1430 | hdr->putStr(HDR_X_REQUEST_URI, |
1431 | http->memOjbect()->url ? http->memObject()->url : http->uri); | |
62e76326 | 1432 | |
edce4d98 | 1433 | #endif |
62e76326 | 1434 | |
45cca89d AJ |
1435 | /* Surrogate-Control requires Surrogate-Capability from upstream to pass on */ |
1436 | if ( hdr->has(HDR_SURROGATE_CONTROL) ) { | |
1437 | if (!request->header.has(HDR_SURROGATE_CAPABILITY)) { | |
1438 | hdr->delById(HDR_SURROGATE_CONTROL); | |
1439 | } | |
1440 | /* TODO: else case: drop any controls intended specifically for our surrogate ID */ | |
1441 | } | |
1442 | ||
8c01ada0 | 1443 | httpHdrMangleList(hdr, request, ROR_REPLY); |
edce4d98 | 1444 | } |
1445 | ||
1446 | ||
0655fa4d | 1447 | void |
b297bcd0 | 1448 | clientReplyContext::cloneReply() |
edce4d98 | 1449 | { |
7dc5f514 | 1450 | assert(reply == NULL); |
0655fa4d | 1451 | |
b297bcd0 | 1452 | HttpReply *rep = http->storeEntry()->getReply()->clone(); |
7dc5f514 | 1453 | |
1454 | reply = HTTPMSGLOCK(rep); | |
1455 | ||
e77d7ef0 | 1456 | if (reply->sline.protocol == PROTO_HTTP) { |
871c031f AJ |
1457 | /* RFC 2616 requires us to advertise our 1.1 version (but only on real HTTP traffic) */ |
1458 | reply->sline.version = HttpVersion(1,1); | |
e77d7ef0 | 1459 | } |
0655fa4d | 1460 | |
1461 | /* do header conversions */ | |
1462 | buildReplyHeader(); | |
edce4d98 | 1463 | } |
1464 | ||
e6ccf245 | 1465 | void |
1466 | clientReplyContext::identifyStoreObject() | |
edce4d98 | 1467 | { |
190154cf | 1468 | HttpRequest *r = http->request; |
62e76326 | 1469 | |
e6ccf245 | 1470 | if (r->flags.cachable || r->flags.internal) { |
62e76326 | 1471 | lookingforstore = 5; |
1472 | StoreEntry::getPublicByRequest (this, r); | |
559da936 | 1473 | } else { |
62e76326 | 1474 | identifyFoundObject (NullStoreEntry::getInstance()); |
559da936 | 1475 | } |
e6ccf245 | 1476 | } |
1477 | ||
7d5f62a4 AJ |
1478 | /** |
1479 | * Check state of the current StoreEntry object. | |
1480 | * to see if we can determine the final status of the request. | |
1481 | */ | |
e6ccf245 | 1482 | void |
1483 | clientReplyContext::identifyFoundObject(StoreEntry *newEntry) | |
1484 | { | |
1485 | StoreEntry *e = newEntry; | |
190154cf | 1486 | HttpRequest *r = http->request; |
62e76326 | 1487 | |
d85b8894 | 1488 | /** \li If the entry received isNull() then we ignore it. */ |
e6ccf245 | 1489 | if (e->isNull()) { |
86a2f789 | 1490 | http->storeEntry(NULL); |
e6ccf245 | 1491 | } else { |
86a2f789 | 1492 | http->storeEntry(e); |
e6ccf245 | 1493 | } |
62e76326 | 1494 | |
86a2f789 | 1495 | e = http->storeEntry(); |
a12a049a | 1496 | |
7d5f62a4 | 1497 | /* Release IP-cache entries on reload */ |
d85b8894 | 1498 | /** \li If the request has no-cache flag set or some no_cache HACK in operation we |
7d5f62a4 AJ |
1499 | * 'invalidate' the cached IP entries for this request ??? |
1500 | */ | |
a12a049a | 1501 | if (r->flags.nocache) { |
1502 | ||
1503 | #if USE_DNSSERVERS | |
62e76326 | 1504 | |
cc192b50 | 1505 | ipcacheInvalidate(r->GetHost()); |
62e76326 | 1506 | |
a12a049a | 1507 | #else |
1508 | ||
cc192b50 | 1509 | ipcacheInvalidateNegative(r->GetHost()); |
a12a049a | 1510 | |
1511 | #endif /* USE_DNSSERVERS */ | |
1512 | ||
1513 | } | |
1514 | ||
626096be | 1515 | #if USE_HTTP_VIOLATIONS |
62e76326 | 1516 | |
a12a049a | 1517 | else if (r->flags.nocache_hack) { |
1518 | ||
1519 | #if USE_DNSSERVERS | |
1520 | ||
cc192b50 | 1521 | ipcacheInvalidate(r->GetHost()); |
62e76326 | 1522 | |
a12a049a | 1523 | #else |
1524 | ||
cc192b50 | 1525 | ipcacheInvalidateNegative(r->GetHost()); |
a12a049a | 1526 | |
1527 | #endif /* USE_DNSSERVERS */ | |
1528 | ||
1529 | } | |
1530 | ||
626096be | 1531 | #endif /* USE_HTTP_VIOLATIONS */ |
edce4d98 | 1532 | #if USE_CACHE_DIGESTS |
62e76326 | 1533 | |
86a2f789 | 1534 | lookup_type = http->storeEntry() ? "HIT" : "MISS"; |
62e76326 | 1535 | |
edce4d98 | 1536 | #endif |
62e76326 | 1537 | |
86a2f789 | 1538 | if (NULL == http->storeEntry()) { |
d85b8894 | 1539 | /** \li If no StoreEntry object is current assume this object isn't in the cache set MISS*/ |
7d5f62a4 | 1540 | debugs(85, 3, "clientProcessRequest2: StoreEntry is NULL - MISS"); |
62e76326 | 1541 | http->logType = LOG_TCP_MISS; |
1542 | doGetMoreData(); | |
1543 | return; | |
edce4d98 | 1544 | } |
62e76326 | 1545 | |
edce4d98 | 1546 | if (Config.onoff.offline) { |
d85b8894 | 1547 | /** \li If we are running in offline mode set to HIT */ |
bf8fe701 | 1548 | debugs(85, 3, "clientProcessRequest2: offline HIT"); |
62e76326 | 1549 | http->logType = LOG_TCP_HIT; |
1550 | doGetMoreData(); | |
1551 | return; | |
edce4d98 | 1552 | } |
62e76326 | 1553 | |
edce4d98 | 1554 | if (http->redirect.status) { |
d85b8894 | 1555 | /** \li If redirection status is True force this to be a MISS */ |
7d5f62a4 | 1556 | debugs(85, 3, "clientProcessRequest2: redirectStatus forced StoreEntry to NULL - MISS"); |
86a2f789 | 1557 | http->storeEntry(NULL); |
62e76326 | 1558 | http->logType = LOG_TCP_MISS; |
1559 | doGetMoreData(); | |
1560 | return; | |
edce4d98 | 1561 | } |
62e76326 | 1562 | |
3900307b | 1563 | if (!e->validToSend()) { |
bf8fe701 | 1564 | debugs(85, 3, "clientProcessRequest2: !storeEntryValidToSend MISS" ); |
86a2f789 | 1565 | http->storeEntry(NULL); |
62e76326 | 1566 | http->logType = LOG_TCP_MISS; |
1567 | doGetMoreData(); | |
1568 | return; | |
edce4d98 | 1569 | } |
62e76326 | 1570 | |
edce4d98 | 1571 | if (EBIT_TEST(e->flags, ENTRY_SPECIAL)) { |
d85b8894 | 1572 | /* \li Special entries are always hits, no matter what the client says */ |
bf8fe701 | 1573 | debugs(85, 3, "clientProcessRequest2: ENTRY_SPECIAL HIT"); |
62e76326 | 1574 | http->logType = LOG_TCP_HIT; |
1575 | doGetMoreData(); | |
1576 | return; | |
edce4d98 | 1577 | } |
62e76326 | 1578 | |
edce4d98 | 1579 | if (r->flags.nocache) { |
bf8fe701 | 1580 | debugs(85, 3, "clientProcessRequest2: no-cache REFRESH MISS"); |
86a2f789 | 1581 | http->storeEntry(NULL); |
62e76326 | 1582 | http->logType = LOG_TCP_CLIENT_REFRESH_MISS; |
1583 | doGetMoreData(); | |
1584 | return; | |
edce4d98 | 1585 | } |
62e76326 | 1586 | |
bf8fe701 | 1587 | debugs(85, 3, "clientProcessRequest2: default HIT"); |
e6ccf245 | 1588 | http->logType = LOG_TCP_HIT; |
1589 | doGetMoreData(); | |
edce4d98 | 1590 | } |
1591 | ||
d85b8894 AJ |
1592 | /** |
1593 | * Request more data from the store for the client Stream | |
edce4d98 | 1594 | * This is *the* entry point to this module. |
1595 | * | |
1596 | * Preconditions: | |
d85b8894 AJ |
1597 | * - This is the head of the list. |
1598 | * - There is at least one more node. | |
1599 | * - Data context is not null | |
edce4d98 | 1600 | */ |
1601 | void | |
59a1efb2 | 1602 | clientGetMoreData(clientStreamNode * aNode, ClientHttpRequest * http) |
edce4d98 | 1603 | { |
edce4d98 | 1604 | /* Test preconditions */ |
e6ccf245 | 1605 | assert(aNode != NULL); |
1606 | assert(cbdataReferenceValid(aNode)); | |
e6ccf245 | 1607 | assert(aNode->node.prev == NULL); |
1608 | assert(aNode->node.next != NULL); | |
0655fa4d | 1609 | clientReplyContext *context = dynamic_cast<clientReplyContext *>(aNode->data.getRaw()); |
1610 | assert (context); | |
edce4d98 | 1611 | assert(context->http == http); |
1612 | ||
559da936 | 1613 | |
0655fa4d | 1614 | clientStreamNode *next = ( clientStreamNode *)aNode->node.next->data; |
62e76326 | 1615 | |
edce4d98 | 1616 | if (!context->ourNode) |
62e76326 | 1617 | context->ourNode = aNode; |
1618 | ||
e6ccf245 | 1619 | /* no cbdatareference, this is only used once, and safely */ |
edce4d98 | 1620 | if (context->flags.storelogiccomplete) { |
62e76326 | 1621 | StoreIOBuffer tempBuffer; |
1622 | tempBuffer.offset = next->readBuffer.offset + context->headers_sz; | |
1623 | tempBuffer.length = next->readBuffer.length; | |
1624 | tempBuffer.data = next->readBuffer.data; | |
1625 | ||
86a2f789 | 1626 | storeClientCopy(context->sc, http->storeEntry(), |
0655fa4d | 1627 | tempBuffer, clientReplyContext::SendMoreData, context); |
62e76326 | 1628 | return; |
edce4d98 | 1629 | } |
62e76326 | 1630 | |
edce4d98 | 1631 | if (context->http->request->method == METHOD_PURGE) { |
62e76326 | 1632 | context->purgeRequest(); |
1633 | return; | |
edce4d98 | 1634 | } |
62e76326 | 1635 | |
e18b8316 | 1636 | // OPTIONS with Max-Forwards:0 handled in clientProcessRequest() |
fc90edc3 | 1637 | |
edce4d98 | 1638 | if (context->http->request->method == METHOD_TRACE) { |
62e76326 | 1639 | if (context->http->request->max_forwards == 0) { |
0655fa4d | 1640 | context->traceReply(aNode); |
62e76326 | 1641 | return; |
1642 | } | |
1643 | ||
1644 | /* continue forwarding, not finished yet. */ | |
1645 | http->logType = LOG_TCP_MISS; | |
1646 | ||
1647 | context->doGetMoreData(); | |
edce4d98 | 1648 | } else |
62e76326 | 1649 | context->identifyStoreObject(); |
e6ccf245 | 1650 | } |
1651 | ||
1652 | void | |
1653 | clientReplyContext::doGetMoreData() | |
1654 | { | |
edce4d98 | 1655 | /* We still have to do store logic processing - vary, cache hit etc */ |
86a2f789 | 1656 | if (http->storeEntry() != NULL) { |
62e76326 | 1657 | /* someone found the object in the cache for us */ |
8bcf08e0 | 1658 | StoreIOBuffer localTempBuffer; |
34266cde | 1659 | |
3d0ac046 | 1660 | http->storeEntry()->lock(); |
62e76326 | 1661 | |
86a2f789 | 1662 | if (http->storeEntry()->mem_obj == NULL) { |
62e76326 | 1663 | /* |
1664 | * This if-block exists because we don't want to clobber | |
1665 | * a preexiting mem_obj->method value if the mem_obj | |
1666 | * already exists. For example, when a HEAD request | |
1667 | * is a cache hit for a GET response, we want to keep | |
1668 | * the method as GET. | |
1669 | */ | |
3900307b | 1670 | http->storeEntry()->createMemObject(http->uri, http->log_uri); |
7d5f62a4 | 1671 | http->storeEntry()->mem_obj->method = http->request->method; |
62e76326 | 1672 | } |
1673 | ||
86a2f789 | 1674 | sc = storeClientListAdd(http->storeEntry(), this); |
edce4d98 | 1675 | #if DELAY_POOLS |
62e76326 | 1676 | |
1677 | sc->setDelayId(DelayId::DelayClient(http)); | |
edce4d98 | 1678 | #endif |
62e76326 | 1679 | |
1680 | assert(http->logType == LOG_TCP_HIT); | |
1681 | reqofs = 0; | |
1682 | /* guarantee nothing has been sent yet! */ | |
1683 | assert(http->out.size == 0); | |
1684 | assert(http->out.offset == 0); | |
b86ab75b | 1685 | #if USE_ZPH_QOS |
b7ac5457 AJ |
1686 | if (Ip::Qos::TheConfig.tos_local_hit) { |
1687 | debugs(33, 2, "ZPH Local hit, TOS=" << Ip::Qos::TheConfig.tos_local_hit); | |
1688 | comm_set_tos(http->getConn()->fd, Ip::Qos::TheConfig.tos_local_hit); | |
b86ab75b AJ |
1689 | } |
1690 | #endif /* USE_ZPH_QOS */ | |
8bcf08e0 FC |
1691 | localTempBuffer.offset = reqofs; |
1692 | localTempBuffer.length = getNextNode()->readBuffer.length; | |
1693 | localTempBuffer.data = getNextNode()->readBuffer.data; | |
1694 | storeClientCopy(sc, http->storeEntry(), localTempBuffer, CacheHit, this); | |
edce4d98 | 1695 | } else { |
62e76326 | 1696 | /* MISS CASE, http->logType is already set! */ |
0655fa4d | 1697 | processMiss(); |
edce4d98 | 1698 | } |
1699 | } | |
1700 | ||
d85b8894 | 1701 | /** The next node has removed itself from the stream. */ |
edce4d98 | 1702 | void |
59a1efb2 | 1703 | clientReplyDetach(clientStreamNode * node, ClientHttpRequest * http) |
edce4d98 | 1704 | { |
d85b8894 | 1705 | /** detach from the stream */ |
edce4d98 | 1706 | clientStreamDetach(node, http); |
1707 | } | |
1708 | ||
d85b8894 AJ |
1709 | /** |
1710 | * Accepts chunk of a http message in buf, parses prefix, filters headers and | |
edce4d98 | 1711 | * such, writes processed message to the message recipient |
1712 | */ | |
1713 | void | |
0655fa4d | 1714 | clientReplyContext::SendMoreData(void *data, StoreIOBuffer result) |
edce4d98 | 1715 | { |
e6ccf245 | 1716 | clientReplyContext *context = static_cast<clientReplyContext *>(data); |
528b2c61 | 1717 | context->sendMoreData (result); |
1718 | } | |
1719 | ||
1720 | void | |
1721 | clientReplyContext::makeThisHead() | |
1722 | { | |
1723 | /* At least, I think thats what this does */ | |
1724 | dlinkDelete(&http->active, &ClientActiveRequests); | |
1725 | dlinkAdd(http, &http->active, &ClientActiveRequests); | |
1726 | } | |
1727 | ||
1728 | bool | |
1729 | clientReplyContext::errorInStream(StoreIOBuffer const &result, size_t const &sizeToProcess)const | |
1730 | { | |
1731 | return /* aborted request */ | |
86a2f789 | 1732 | (http->storeEntry() && EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) || |
62e76326 | 1733 | /* Upstream read error */ (result.flags.error) || |
1734 | /* Upstream EOF */ (sizeToProcess == 0); | |
528b2c61 | 1735 | } |
1736 | ||
1737 | void | |
1738 | clientReplyContext::sendStreamError(StoreIOBuffer const &result) | |
1739 | { | |
d85b8894 | 1740 | /** call clientWriteComplete so the client socket gets closed |
af6a12ee | 1741 | * |
d85b8894 | 1742 | * We call into the stream, because we don't know that there is a |
528b2c61 | 1743 | * client socket! |
1744 | */ | |
26ac0430 | 1745 | debugs(88, 5, "clientReplyContext::sendStreamError: A stream error has occured, marking as complete and sending no data."); |
8bcf08e0 | 1746 | StoreIOBuffer localTempBuffer; |
528b2c61 | 1747 | flags.complete = 1; |
4ad60609 | 1748 | http->request->flags.stream_error = 1; |
8bcf08e0 | 1749 | localTempBuffer.flags.error = result.flags.error; |
528b2c61 | 1750 | clientStreamCallback((clientStreamNode*)http->client_stream.head->data, http, NULL, |
8bcf08e0 | 1751 | localTempBuffer); |
528b2c61 | 1752 | } |
1753 | ||
1754 | void | |
1755 | clientReplyContext::pushStreamData(StoreIOBuffer const &result, char *source) | |
1756 | { | |
8bcf08e0 | 1757 | StoreIOBuffer localTempBuffer; |
62e76326 | 1758 | |
528b2c61 | 1759 | if (result.length == 0) { |
bf8fe701 | 1760 | debugs(88, 5, "clientReplyContext::pushStreamData: marking request as complete due to 0 length store result"); |
62e76326 | 1761 | flags.complete = 1; |
528b2c61 | 1762 | } |
62e76326 | 1763 | |
43ae1d95 | 1764 | assert(result.offset - headers_sz == next()->readBuffer.offset); |
8bcf08e0 FC |
1765 | localTempBuffer.offset = result.offset - headers_sz; |
1766 | localTempBuffer.length = result.length; | |
62e76326 | 1767 | |
8bcf08e0 FC |
1768 | if (localTempBuffer.length) |
1769 | localTempBuffer.data = source; | |
62e76326 | 1770 | |
528b2c61 | 1771 | clientStreamCallback((clientStreamNode*)http->client_stream.head->data, http, NULL, |
8bcf08e0 | 1772 | localTempBuffer); |
528b2c61 | 1773 | } |
1774 | ||
1775 | clientStreamNode * | |
1776 | clientReplyContext::next() const | |
1777 | { | |
1778 | assert ( (clientStreamNode*)http->client_stream.head->next->data == getNextNode()); | |
1779 | return getNextNode(); | |
1780 | } | |
1781 | ||
b51aec66 | 1782 | void |
16611143 | 1783 | clientReplyContext::sendBodyTooLargeError() |
b51aec66 | 1784 | { |
b7ac5457 | 1785 | Ip::Address tmp_noaddr; |
26ac0430 | 1786 | tmp_noaddr.SetNoAddr(); // TODO: make a global const |
af0d9bca | 1787 | http->logType = LOG_TCP_DENIED_REPLY; |
16611143 | 1788 | ErrorState *err = clientBuildError(ERR_TOO_BIG, HTTP_FORBIDDEN, NULL, |
26ac0430 AJ |
1789 | http->getConn() != NULL ? http->getConn()->peer : tmp_noaddr, |
1790 | http->request); | |
16611143 | 1791 | removeClientStoreReference(&(sc), http); |
1792 | HTTPMSGUNLOCK(reply); | |
1793 | startError(err); | |
26ac0430 | 1794 | |
b51aec66 | 1795 | } |
1796 | ||
4993f571 | 1797 | void |
1798 | clientReplyContext::processReplyAccess () | |
1799 | { | |
b50e327b | 1800 | /* NP: this should probably soft-fail to a zero-sized-reply error ?? */ |
7dc5f514 | 1801 | assert(reply); |
b50e327b AJ |
1802 | |
1803 | /** Don't block our own responses or HTTP status messages */ | |
16611143 | 1804 | if (http->logType == LOG_TCP_DENIED || |
26ac0430 AJ |
1805 | http->logType == LOG_TCP_DENIED_REPLY || |
1806 | alwaysAllowResponse(reply->sline.status)) { | |
acbf9428 | 1807 | headers_sz = reply->hdr_sz; |
26ac0430 AJ |
1808 | processReplyAccessResult(1); |
1809 | return; | |
230a8cc6 | 1810 | } |
26ac0430 | 1811 | |
b50e327b | 1812 | /** Check for reply to big error */ |
16611143 | 1813 | if (reply->expectedBodyTooLarge(*http->request)) { |
1814 | sendBodyTooLargeError(); | |
62e76326 | 1815 | return; |
1816 | } | |
1817 | ||
7dc5f514 | 1818 | headers_sz = reply->hdr_sz; |
230a8cc6 | 1819 | |
b50e327b | 1820 | /** check for absent access controls (permit by default) */ |
230a8cc6 | 1821 | if (!Config.accessList.reply) { |
26ac0430 AJ |
1822 | processReplyAccessResult(1); |
1823 | return; | |
230a8cc6 | 1824 | } |
1825 | ||
b50e327b | 1826 | /** Process http_reply_access lists */ |
127dce76 AR |
1827 | ACLFilledChecklist *replyChecklist = |
1828 | clientAclChecklistCreate(Config.accessList.reply, http); | |
7dc5f514 | 1829 | replyChecklist->reply = HTTPMSGLOCK(reply); |
0655fa4d | 1830 | replyChecklist->nonBlockingCheck(ProcessReplyAccessResult, this); |
4993f571 | 1831 | } |
1832 | ||
1833 | void | |
0655fa4d | 1834 | clientReplyContext::ProcessReplyAccessResult (int rv, void *voidMe) |
4993f571 | 1835 | { |
1836 | clientReplyContext *me = static_cast<clientReplyContext *>(voidMe); | |
0655fa4d | 1837 | me->processReplyAccessResult(rv); |
4993f571 | 1838 | } |
1839 | ||
1840 | void | |
0655fa4d | 1841 | clientReplyContext::processReplyAccessResult(bool accessAllowed) |
4993f571 | 1842 | { |
26ac0430 AJ |
1843 | debugs(88, 2, "The reply for " << RequestMethodStr(http->request->method) |
1844 | << " " << http->uri << " is " | |
1845 | << ( accessAllowed ? "ALLOWED" : "DENIED") | |
1846 | << ", because it matched '" | |
bf8fe701 | 1847 | << (AclMatchedName ? AclMatchedName : "NO ACL's") << "'" ); |
62e76326 | 1848 | |
230a8cc6 | 1849 | if (!accessAllowed) { |
62e76326 | 1850 | ErrorState *err; |
0185bd6f | 1851 | err_type page_id; |
9ce7856a | 1852 | page_id = aclGetDenyInfoPage(&Config.denyInfoList, AclMatchedName, 1); |
0185bd6f | 1853 | |
c466369c | 1854 | http->logType = LOG_TCP_DENIED_REPLY; |
1855 | ||
0185bd6f | 1856 | if (page_id == ERR_NONE) |
1857 | page_id = ERR_ACCESS_DENIED; | |
1858 | ||
b7ac5457 | 1859 | Ip::Address tmp_noaddr; |
26ac0430 | 1860 | tmp_noaddr.SetNoAddr(); |
cc192b50 | 1861 | err = clientBuildError(page_id, HTTP_FORBIDDEN, NULL, |
26ac0430 AJ |
1862 | http->getConn() != NULL ? http->getConn()->peer : tmp_noaddr, |
1863 | http->request); | |
0185bd6f | 1864 | |
86a2f789 | 1865 | removeClientStoreReference(&sc, http); |
0185bd6f | 1866 | |
7dc5f514 | 1867 | HTTPMSGUNLOCK(reply); |
0185bd6f | 1868 | |
3c2c1d31 | 1869 | startError(err); |
1870 | ||
0185bd6f | 1871 | |
62e76326 | 1872 | return; |
1873 | } | |
1874 | ||
0976f8db | 1875 | /* Ok, the reply is allowed, */ |
1876 | http->loggingEntry(http->storeEntry()); | |
1877 | ||
7dc5f514 | 1878 | ssize_t body_size = reqofs - reply->hdr_sz; |
b297bcd0 | 1879 | if (body_size < 0) { |
26ac0430 AJ |
1880 | reqofs = reply->hdr_sz; |
1881 | body_size = 0; | |
b297bcd0 | 1882 | } |
0976f8db | 1883 | |
bf8fe701 | 1884 | debugs(88, 3, "clientReplyContext::sendMoreData: Appending " << |
1885 | (int) body_size << " bytes after " << reply->hdr_sz << | |
1886 | " bytes of headers"); | |
0976f8db | 1887 | |
f41735ea | 1888 | #if USE_SQUID_ESI |
62e76326 | 1889 | |
7dc5f514 | 1890 | if (http->flags.accel && reply->sline.status != HTTP_FORBIDDEN && |
1891 | !alwaysAllowResponse(reply->sline.status) && | |
1892 | esiEnableProcessing(reply)) { | |
bf8fe701 | 1893 | debugs(88, 2, "Enabling ESI processing for " << http->uri); |
43ae1d95 | 1894 | clientStreamInsertHead(&http->client_stream, esiStreamRead, |
1895 | esiProcessStream, esiStreamDetach, esiStreamStatus, NULL); | |
1896 | } | |
1897 | ||
5ef38a13 | 1898 | #endif |
1899 | ||
62e76326 | 1900 | if (http->request->method == METHOD_HEAD) { |
1901 | /* do not forward body for HEAD replies */ | |
1902 | body_size = 0; | |
1903 | http->flags.done_copying = 1; | |
1904 | flags.complete = 1; | |
1905 | } | |
1906 | ||
1907 | assert (!flags.headersSent); | |
1908 | flags.headersSent = true; | |
1909 | ||
8bcf08e0 | 1910 | StoreIOBuffer localTempBuffer; |
62e76326 | 1911 | char *buf = next()->readBuffer.data; |
e85eb4e1 | 1912 | char *body_buf = buf + reply->hdr_sz; |
62e76326 | 1913 | |
49ea0125 | 1914 | //Server side may disable ranges under some circumstances. |
1915 | ||
1916 | if ((!http->request->range)) | |
1917 | next()->readBuffer.offset = 0; | |
1918 | ||
e85eb4e1 AJ |
1919 | body_buf -= next()->readBuffer.offset; |
1920 | ||
62e76326 | 1921 | if (next()->readBuffer.offset != 0) { |
1922 | if (next()->readBuffer.offset > body_size) { | |
2324cda2 | 1923 | /* Can't use any of the body we received. send nothing */ |
8bcf08e0 FC |
1924 | localTempBuffer.length = 0; |
1925 | localTempBuffer.data = NULL; | |
62e76326 | 1926 | } else { |
8bcf08e0 FC |
1927 | localTempBuffer.length = body_size - next()->readBuffer.offset; |
1928 | localTempBuffer.data = body_buf + next()->readBuffer.offset; | |
62e76326 | 1929 | } |
1930 | } else { | |
8bcf08e0 FC |
1931 | localTempBuffer.length = body_size; |
1932 | localTempBuffer.data = body_buf; | |
62e76326 | 1933 | } |
1934 | ||
0655fa4d | 1935 | /* TODO??: move the data in the buffer back by the request header size */ |
62e76326 | 1936 | clientStreamCallback((clientStreamNode *)http->client_stream.head->data, |
8bcf08e0 | 1937 | http, reply, localTempBuffer); |
62e76326 | 1938 | |
1939 | return; | |
4993f571 | 1940 | } |
1941 | ||
528b2c61 | 1942 | void |
1943 | clientReplyContext::sendMoreData (StoreIOBuffer result) | |
1944 | { | |
50c09fc4 | 1945 | if (deleting) |
1946 | return; | |
1947 | ||
86a2f789 | 1948 | StoreEntry *entry = http->storeEntry(); |
50c09fc4 | 1949 | |
1cf238db | 1950 | ConnStateData * conn = http->getConn(); |
50c09fc4 | 1951 | |
94a396a3 | 1952 | int fd = conn != NULL ? conn->fd : -1; |
9af2f95b AR |
1953 | if (fd >= 0 && fd_table[fd].closing()) { // too late, our conn is closing |
1954 | // TODO: should we also quit when fd is negative? | |
1955 | debugs(33,3, HERE << "not sending more data to a closing FD " << fd); | |
1956 | return; | |
1957 | } | |
50c09fc4 | 1958 | |
528b2c61 | 1959 | char *buf = next()->readBuffer.data; |
50c09fc4 | 1960 | |
c8be6d7b | 1961 | char *body_buf = buf; |
edce4d98 | 1962 | |
da33c835 | 1963 | if (buf != result.data) { |
62e76326 | 1964 | /* we've got to copy some data */ |
1965 | assert(result.length <= next()->readBuffer.length); | |
1966 | xmemcpy(buf, result.data, result.length); | |
1967 | body_buf = buf; | |
edce4d98 | 1968 | } |
62e76326 | 1969 | |
452bb8e2 | 1970 | #if USE_ZPH_QOS |
26ac0430 | 1971 | if (reqofs==0 && !logTypeIsATcpHit(http->logType)) { |
9af2f95b | 1972 | assert(fd >= 0); // the beginning of this method implies fd may be -1 |
452bb8e2 | 1973 | int tos = 0; |
b7ac5457 AJ |
1974 | if (Ip::Qos::TheConfig.tos_sibling_hit && http->request->hier.code==SIBLING_HIT ) { |
1975 | tos = Ip::Qos::TheConfig.tos_sibling_hit; | |
575cb927 | 1976 | debugs(33, 2, "ZPH: Sibling Peer hit with hier.code=" << http->request->hier.code << ", TOS=" << tos); |
b7ac5457 AJ |
1977 | } else if (Ip::Qos::TheConfig.tos_parent_hit && http->request->hier.code==PARENT_HIT) { |
1978 | tos = Ip::Qos::TheConfig.tos_parent_hit; | |
575cb927 | 1979 | debugs(33, 2, "ZPH: Parent Peer hit with hier.code=" << http->request->hier.code << ", TOS=" << tos); |
b7ac5457 AJ |
1980 | } else if (Ip::Qos::TheConfig.preserve_miss_tos && Ip::Qos::TheConfig.preserve_miss_tos_mask) { |
1981 | tos = fd_table[fd].upstreamTOS & Ip::Qos::TheConfig.preserve_miss_tos_mask; | |
452bb8e2 AJ |
1982 | debugs(33, 2, "ZPH: Preserving TOS on miss, TOS="<<tos); |
1983 | } | |
1984 | comm_set_tos(fd,tos); | |
7172612f | 1985 | } |
26ac0430 | 1986 | #endif |
7172612f | 1987 | |
ab9c533b HN |
1988 | /* We've got the final data to start pushing... */ |
1989 | flags.storelogiccomplete = 1; | |
1990 | ||
4993f571 | 1991 | reqofs += result.length; |
1992 | ||
1993 | assert(reqofs <= HTTP_REQBUF_SZ || flags.headersSent); | |
62e76326 | 1994 | |
edce4d98 | 1995 | assert(http->request != NULL); |
62e76326 | 1996 | |
edce4d98 | 1997 | /* ESI TODO: remove this assert once everything is stable */ |
1998 | assert(http->client_stream.head->data | |
62e76326 | 1999 | && cbdataReferenceValid(http->client_stream.head->data)); |
528b2c61 | 2000 | |
2001 | makeThisHead(); | |
62e76326 | 2002 | |
bf8fe701 | 2003 | debugs(88, 5, "clientReplyContext::sendMoreData: " << http->uri << ", " << |
47f6e231 | 2004 | reqofs << " bytes (" << result.length << |
bf8fe701 | 2005 | " new bytes)"); |
47f6e231 | 2006 | debugs(88, 5, "clientReplyContext::sendMoreData:" |
26ac0430 AJ |
2007 | " FD " << fd << |
2008 | " '" << entry->url() << "'" << | |
2009 | " out.offset=" << http->out.offset); | |
528b2c61 | 2010 | |
edce4d98 | 2011 | /* update size of the request */ |
4993f571 | 2012 | reqsize = reqofs; |
62e76326 | 2013 | |
4993f571 | 2014 | if (errorInStream(result, reqofs)) { |
62e76326 | 2015 | sendStreamError(result); |
2016 | return; | |
edce4d98 | 2017 | } |
528b2c61 | 2018 | |
2019 | if (flags.headersSent) { | |
62e76326 | 2020 | pushStreamData (result, buf); |
2021 | return; | |
edce4d98 | 2022 | } |
62e76326 | 2023 | |
b297bcd0 | 2024 | cloneReply(); |
21b92762 | 2025 | |
b297bcd0 | 2026 | /* handle headers */ |
21b92762 | 2027 | |
b297bcd0 | 2028 | if (Config.onoff.log_mime_hdrs) { |
26ac0430 | 2029 | size_t k; |
43ae1d95 | 2030 | |
26ac0430 AJ |
2031 | if ((k = headersEnd(buf, reqofs))) { |
2032 | safe_free(http->al.headers.reply); | |
2033 | http->al.headers.reply = (char *)xcalloc(k + 1, 1); | |
2034 | xstrncpy(http->al.headers.reply, buf, k); | |
2035 | } | |
edce4d98 | 2036 | } |
b297bcd0 HN |
2037 | |
2038 | holdingBuffer = result; | |
2039 | processReplyAccess(); | |
2040 | return; | |
edce4d98 | 2041 | } |
2042 | ||
62e76326 | 2043 | |
edce4d98 | 2044 | |
2045 | /* Using this breaks the client layering just a little! | |
2046 | */ | |
0655fa4d | 2047 | void |
8bcf08e0 | 2048 | clientReplyContext::createStoreEntry(const HttpRequestMethod& m, request_flags reqFlags) |
edce4d98 | 2049 | { |
0655fa4d | 2050 | assert(http != NULL); |
edce4d98 | 2051 | /* |
2052 | * For erroneous requests, we might not have a h->request, | |
2053 | * so make a fake one. | |
2054 | */ | |
62e76326 | 2055 | |
0655fa4d | 2056 | if (http->request == NULL) |
6dd9f4bd | 2057 | http->request = HTTPMSGLOCK(new HttpRequest(m, PROTO_NONE, null_string)); |
62e76326 | 2058 | |
8bcf08e0 | 2059 | StoreEntry *e = storeCreateEntry(http->uri, http->log_uri, reqFlags, m); |
62e76326 | 2060 | |
0655fa4d | 2061 | sc = storeClientListAdd(e, this); |
62e76326 | 2062 | |
edce4d98 | 2063 | #if DELAY_POOLS |
62e76326 | 2064 | |
0655fa4d | 2065 | sc->setDelayId(DelayId::DelayClient(http)); |
62e76326 | 2066 | |
edce4d98 | 2067 | #endif |
62e76326 | 2068 | |
0655fa4d | 2069 | reqofs = 0; |
62e76326 | 2070 | |
0655fa4d | 2071 | reqsize = 0; |
62e76326 | 2072 | |
edce4d98 | 2073 | /* I don't think this is actually needed! -- adrian */ |
0655fa4d | 2074 | /* http->reqbuf = http->norm_reqbuf; */ |
2075 | // assert(http->reqbuf == http->norm_reqbuf); | |
edce4d98 | 2076 | /* The next line is illegal because we don't know if the client stream |
26ac0430 | 2077 | * buffers have been set up |
edce4d98 | 2078 | */ |
0655fa4d | 2079 | // storeClientCopy(http->sc, e, 0, HTTP_REQBUF_SZ, http->reqbuf, |
2080 | // SendMoreData, this); | |
edce4d98 | 2081 | /* So, we mark the store logic as complete */ |
8bcf08e0 | 2082 | flags.storelogiccomplete = 1; |
62e76326 | 2083 | |
edce4d98 | 2084 | /* and get the caller to request a read, from whereever they are */ |
62e76326 | 2085 | /* NOTE: after ANY data flows down the pipe, even one step, |
26ac0430 | 2086 | * this function CAN NOT be used to manage errors |
edce4d98 | 2087 | */ |
86a2f789 | 2088 | http->storeEntry(e); |
edce4d98 | 2089 | } |
2090 | ||
2091 | ErrorState * | |
2092 | clientBuildError(err_type page_id, http_status status, char const *url, | |
b7ac5457 | 2093 | Ip::Address &src_addr, HttpRequest * request) |
edce4d98 | 2094 | { |
2cc81f1f | 2095 | ErrorState *err = errorCon(page_id, status, request); |
cc192b50 | 2096 | err->src_addr = src_addr; |
62e76326 | 2097 | |
edce4d98 | 2098 | if (url) |
62e76326 | 2099 | err->url = xstrdup(url); |
2100 | ||
edce4d98 | 2101 | return err; |
2102 | } |