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edce4d98 | 1 | |
2 | /* | |
00d77d6b | 3 | * $Id: client_side_reply.cc,v 1.63 2003/08/04 22:14:41 robertc Exp $ |
edce4d98 | 4 | * |
5 | * DEBUG: section 88 Client-side Reply Routines | |
6 | * AUTHOR: Robert Collins (Originally Duane Wessels in client_side.c) | |
7 | * | |
8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ | |
9 | * ---------------------------------------------------------- | |
10 | * | |
11 | * Squid is the result of efforts by numerous individuals from | |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
19 | * | |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
33 | * | |
34 | */ | |
35 | ||
36 | #include "squid.h" | |
0655fa4d | 37 | #include "client_side_reply.h" |
c8be6d7b | 38 | #include "StoreClient.h" |
e6ccf245 | 39 | #include "Store.h" |
528b2c61 | 40 | #include "HttpReply.h" |
41 | #include "HttpRequest.h" | |
e6ccf245 | 42 | |
c8be6d7b | 43 | #include "clientStream.h" |
e6ccf245 | 44 | #include "authenticate.h" |
43ae1d95 | 45 | #if ESI |
46 | #include "ESI.h" | |
47 | #endif | |
528b2c61 | 48 | #include "MemObject.h" |
4fb35c3c | 49 | #include "ACLChecklist.h" |
b0dd28ba | 50 | #include "ACL.h" |
b67e2c8c | 51 | #if DELAY_POOLS |
52 | #include "DelayPools.h" | |
53 | #endif | |
a46d2c0e | 54 | #include "client_side.h" |
e6ccf245 | 55 | |
0655fa4d | 56 | CBDATA_CLASS_INIT(clientReplyContext); |
edce4d98 | 57 | |
edce4d98 | 58 | /* Local functions */ |
e6ccf245 | 59 | extern "C" CSS clientReplyStatus; |
edce4d98 | 60 | extern ErrorState *clientBuildError(err_type, http_status, char const *, |
62e76326 | 61 | |
62 | struct in_addr *, request_t *); | |
edce4d98 | 63 | |
edce4d98 | 64 | /* privates */ |
edce4d98 | 65 | |
0655fa4d | 66 | clientReplyContext::~clientReplyContext() |
edce4d98 | 67 | { |
50c09fc4 | 68 | deleting = true; |
69 | /* This may trigger a callback back into SendMoreData as the cbdata | |
70 | * is still valid | |
71 | */ | |
86a2f789 | 72 | removeClientStoreReference(&sc, http); |
edce4d98 | 73 | /* old_entry might still be set if we didn't yet get the reply |
0655fa4d | 74 | * code in HandleIMSReply() */ |
75 | removeStoreReference(&old_sc, &old_entry); | |
76 | safe_free(tempBuffer.data); | |
77 | cbdataReferenceDone(http); | |
edce4d98 | 78 | } |
79 | ||
50c09fc4 | 80 | clientReplyContext::clientReplyContext(clientHttpRequest *clientContext) : http (cbdataReference(clientContext)), old_entry (NULL), old_sc(NULL), deleting(false) |
0655fa4d | 81 | {} |
edce4d98 | 82 | |
83 | /* create an error in the store awaiting the client side to read it. */ | |
0655fa4d | 84 | /* This may be better placed in the clientStream logic, but it has not been |
85 | * relocated there yet | |
86 | */ | |
edce4d98 | 87 | void |
0655fa4d | 88 | clientReplyContext::setReplyToError( |
89 | err_type err, http_status status, method_t method, char const *uri, | |
62e76326 | 90 | |
0655fa4d | 91 | struct in_addr *addr, request_t * failedrequest, char *unparsedrequest, |
92 | auth_user_request_t * auth_user_request) | |
edce4d98 | 93 | { |
edce4d98 | 94 | ErrorState *errstate = |
62e76326 | 95 | clientBuildError(err, status, uri, addr, failedrequest); |
96 | ||
edce4d98 | 97 | if (unparsedrequest) |
62e76326 | 98 | errstate->request_hdrs = xstrdup(unparsedrequest); |
edce4d98 | 99 | |
0655fa4d | 100 | if (status == HTTP_NOT_IMPLEMENTED && http->request) |
62e76326 | 101 | /* prevent confusion over whether we default to persistent or not */ |
0655fa4d | 102 | http->request->flags.proxy_keepalive = 0; |
62e76326 | 103 | |
0655fa4d | 104 | http->al.http.code = errstate->httpStatus; |
edce4d98 | 105 | |
0655fa4d | 106 | createStoreEntry(method, request_flags()); |
62e76326 | 107 | |
108 | if (auth_user_request) | |
109 | { | |
110 | errstate->auth_user_request = auth_user_request; | |
111 | authenticateAuthUserRequestLock(errstate->auth_user_request); | |
edce4d98 | 112 | } |
62e76326 | 113 | |
edce4d98 | 114 | assert(errstate->callback_data == NULL); |
86a2f789 | 115 | errorAppendEntry(http->storeEntry(), errstate); |
edce4d98 | 116 | /* Now the caller reads to get this */ |
117 | } | |
118 | ||
119 | void | |
0655fa4d | 120 | clientReplyContext::removeStoreReference(store_client ** scp, |
121 | StoreEntry ** ep) | |
edce4d98 | 122 | { |
123 | StoreEntry *e; | |
124 | store_client *sc = *scp; | |
62e76326 | 125 | |
edce4d98 | 126 | if ((e = *ep) != NULL) { |
62e76326 | 127 | *ep = NULL; |
0655fa4d | 128 | storeUnregister(sc, e, this); |
62e76326 | 129 | *scp = NULL; |
130 | storeUnlockObject(e); | |
edce4d98 | 131 | } |
132 | } | |
133 | ||
86a2f789 | 134 | void |
135 | clientReplyContext::removeClientStoreReference(store_client **scp, ClientHttpRequest *http) | |
136 | { | |
137 | StoreEntry *reference = http->storeEntry(); | |
138 | removeStoreReference(scp, &reference); | |
139 | http->storeEntry(reference); | |
140 | } | |
141 | ||
e6ccf245 | 142 | void * |
a695955b | 143 | clientReplyContext::operator new (size_t byteCount) |
e6ccf245 | 144 | { |
145 | /* derived classes with different sizes must implement their own new */ | |
146 | assert (byteCount == sizeof (clientReplyContext)); | |
0655fa4d | 147 | CBDATA_INIT_TYPE(clientReplyContext); |
e6ccf245 | 148 | return cbdataAlloc(clientReplyContext); |
149 | } | |
150 | ||
151 | void | |
152 | clientReplyContext::operator delete (void *address) | |
153 | { | |
a50bfe93 | 154 | clientReplyContext * tmp = (clientReplyContext *)address; |
155 | cbdataFree (tmp); | |
e6ccf245 | 156 | } |
157 | ||
edce4d98 | 158 | void |
0655fa4d | 159 | clientReplyContext::saveState() |
edce4d98 | 160 | { |
e6ccf245 | 161 | assert(old_sc == NULL); |
61fb2d9a | 162 | debug(88, 3)("clientReplyContext::saveState: saving store context\n"); |
86a2f789 | 163 | old_entry = http->storeEntry(); |
e6ccf245 | 164 | old_sc = sc; |
165 | old_reqsize = reqsize; | |
166 | tempBuffer.offset = reqofs; | |
edce4d98 | 167 | /* Prevent accessing the now saved entries */ |
86a2f789 | 168 | http->storeEntry(NULL); |
e6ccf245 | 169 | sc = NULL; |
170 | reqsize = 0; | |
171 | reqofs = 0; | |
edce4d98 | 172 | } |
173 | ||
174 | void | |
0655fa4d | 175 | clientReplyContext::restoreState() |
edce4d98 | 176 | { |
e6ccf245 | 177 | assert(old_sc != NULL); |
61fb2d9a | 178 | debug(88, 3)("clientReplyContext::restoreState: Restoring store context\n"); |
86a2f789 | 179 | removeClientStoreReference(&sc, http); |
180 | http->storeEntry(old_entry); | |
e6ccf245 | 181 | sc = old_sc; |
182 | reqsize = old_reqsize; | |
183 | reqofs = tempBuffer.offset; | |
edce4d98 | 184 | /* Prevent accessed the old saved entries */ |
0655fa4d | 185 | old_entry = NULL; |
e6ccf245 | 186 | old_sc = NULL; |
187 | old_reqsize = 0; | |
188 | tempBuffer.offset = 0; | |
c8be6d7b | 189 | } |
190 | ||
191 | void | |
0655fa4d | 192 | clientReplyContext::startError(ErrorState * err) |
c8be6d7b | 193 | { |
0655fa4d | 194 | createStoreEntry(http->request->method, request_flags()); |
195 | triggerInitialStoreRead(); | |
86a2f789 | 196 | errorAppendEntry(http->storeEntry(), err); |
edce4d98 | 197 | } |
198 | ||
e6ccf245 | 199 | clientStreamNode * |
528b2c61 | 200 | clientReplyContext::getNextNode() const |
e6ccf245 | 201 | { |
62e76326 | 202 | return (clientStreamNode *)ourNode->node.next->data; |
e6ccf245 | 203 | } |
204 | ||
62e76326 | 205 | /* This function is wrong - the client parameters don't include the |
528b2c61 | 206 | * header offset |
207 | */ | |
c8be6d7b | 208 | void |
0655fa4d | 209 | clientReplyContext::triggerInitialStoreRead() |
c8be6d7b | 210 | { |
528b2c61 | 211 | StoreIOBuffer tempBuffer; |
0655fa4d | 212 | /* when confident, 0 becomes reqofs, and then this factors into |
528b2c61 | 213 | * startSendProcess |
214 | */ | |
0655fa4d | 215 | assert(reqofs == 0); |
528b2c61 | 216 | tempBuffer.offset = 0; |
0655fa4d | 217 | tempBuffer.length = next()->readBuffer.length; |
218 | tempBuffer.data = next()->readBuffer.data; | |
86a2f789 | 219 | storeClientCopy(sc, http->storeEntry(), tempBuffer, SendMoreData, this); |
c8be6d7b | 220 | } |
edce4d98 | 221 | |
222 | /* there is an expired entry in the store. | |
223 | * setup a temporary buffer area and perform an IMS to the origin | |
224 | */ | |
0655fa4d | 225 | void |
226 | clientReplyContext::processExpired() | |
edce4d98 | 227 | { |
edce4d98 | 228 | char *url = http->uri; |
229 | StoreEntry *entry = NULL; | |
0655fa4d | 230 | debug(88, 3)("clientReplyContext::processExpired: '%s'", http->uri); |
86a2f789 | 231 | assert(http->storeEntry()->lastmod >= 0); |
edce4d98 | 232 | /* |
233 | * check if we are allowed to contact other servers | |
234 | * @?@: Instead of a 504 (Gateway Timeout) reply, we may want to return | |
235 | * a stale entry *if* it matches client requirements | |
236 | */ | |
62e76326 | 237 | |
0655fa4d | 238 | if (http->onlyIfCached()) { |
239 | processOnlyIfCachedMiss(); | |
62e76326 | 240 | return; |
edce4d98 | 241 | } |
62e76326 | 242 | |
edce4d98 | 243 | http->request->flags.refresh = 1; |
244 | #if STORE_CLIENT_LIST_DEBUG | |
c8be6d7b | 245 | /* Prevent a race with the store client memory free routines |
edce4d98 | 246 | */ |
0655fa4d | 247 | assert(storeClientIsThisAClient(sc, this)); |
edce4d98 | 248 | #endif |
249 | /* Prepare to make a new temporary request */ | |
0655fa4d | 250 | saveState(); |
edce4d98 | 251 | entry = storeCreateEntry(url, |
62e76326 | 252 | http->log_uri, http->request->flags, http->request->method); |
edce4d98 | 253 | /* NOTE, don't call storeLockObject(), storeCreateEntry() does it */ |
0655fa4d | 254 | sc = storeClientListAdd(entry, this); |
edce4d98 | 255 | #if DELAY_POOLS |
256 | /* delay_id is already set on original store client */ | |
0655fa4d | 257 | sc->setDelayId(DelayId::DelayClient(http)); |
edce4d98 | 258 | #endif |
62e76326 | 259 | |
0655fa4d | 260 | http->request->lastmod = old_entry->lastmod; |
261 | debug(88, 5)("clientReplyContext::processExpired : lastmod %ld", | |
62e76326 | 262 | (long int) entry->lastmod); |
86a2f789 | 263 | http->storeEntry(entry); |
c8be6d7b | 264 | assert(http->out.offset == 0); |
a2ac85d9 | 265 | fwdStart(http->getConn().getRaw() != NULL ? http->getConn()->fd : -1, http->storeEntry(), http->request); |
edce4d98 | 266 | /* Register with storage manager to receive updates when data comes in. */ |
62e76326 | 267 | |
edce4d98 | 268 | if (EBIT_TEST(entry->flags, ENTRY_ABORTED)) |
0655fa4d | 269 | debug(88, 0) ("clientReplyContext::processExpired: Found ENTRY_ABORTED object"); |
62e76326 | 270 | |
c8be6d7b | 271 | { |
62e76326 | 272 | /* start counting the length from 0 */ |
0655fa4d | 273 | StoreIOBuffer tempBuffer(HTTP_REQBUF_SZ, 0, tempbuf); |
274 | storeClientCopy(sc, entry, tempBuffer, HandleIMSReply, this); | |
edce4d98 | 275 | } |
276 | } | |
277 | ||
0655fa4d | 278 | bool |
279 | clientReplyContext::clientGetsOldEntry()const | |
edce4d98 | 280 | { |
86a2f789 | 281 | const http_status status = http->storeEntry()->getReply()->sline.status; |
62e76326 | 282 | |
edce4d98 | 283 | if (0 == status) { |
62e76326 | 284 | debug(88, 5) ("clientGetsOldEntry: YES, broken HTTP reply\n"); |
0655fa4d | 285 | return true; |
edce4d98 | 286 | } |
62e76326 | 287 | |
edce4d98 | 288 | /* If the reply is a failure then send the old object as a last |
289 | * resort */ | |
290 | if (status >= 500 && status < 600) { | |
62e76326 | 291 | debug(88, 3) ("clientGetsOldEntry: YES, failure reply=%d\n", status); |
0655fa4d | 292 | return true; |
edce4d98 | 293 | } |
62e76326 | 294 | |
edce4d98 | 295 | /* If the reply is anything but "Not Modified" then |
296 | * we must forward it to the client */ | |
297 | if (HTTP_NOT_MODIFIED != status) { | |
62e76326 | 298 | debug(88, 5) ("clientGetsOldEntry: NO, reply=%d\n", status); |
0655fa4d | 299 | return false; |
edce4d98 | 300 | } |
62e76326 | 301 | |
1ef68325 | 302 | /* If the client did not send IMS in the request, then it |
303 | * must get the old object, not this "Not Modified" reply | |
304 | * REGARDLESS of validation */ | |
0655fa4d | 305 | if (!http->request->flags.ims) { |
62e76326 | 306 | debug(88, 5) ("clientGetsOldEntry: YES, no client IMS\n"); |
0655fa4d | 307 | return true; |
1ef68325 | 308 | } |
62e76326 | 309 | |
528b2c61 | 310 | /* If key metadata in the reply are not consistent with the |
311 | * old entry, we must use the new reply. | |
312 | * Note: this means that the server is sending garbage replies | |
313 | * in that it has sent an IMS that is incompatible with our request!? | |
314 | */ | |
315 | /* This is a duplicate call through the HandleIMS code path. | |
316 | * Can we guarantee we don't need it elsewhere? | |
317 | */ | |
86a2f789 | 318 | if (!httpReplyValidatorsMatch(http->storeEntry()->getReply(), |
62e76326 | 319 | old_entry->getReply())) { |
320 | debug(88, 5) ("clientGetsOldEntry: NO, Old object has been invalidated" | |
321 | "by the new one\n"); | |
0655fa4d | 322 | return false; |
528b2c61 | 323 | } |
62e76326 | 324 | |
edce4d98 | 325 | /* If the client IMS time is prior to the entry LASTMOD time we |
326 | * need to send the old object */ | |
0655fa4d | 327 | if (old_entry->modifiedSince(http->request)) { |
62e76326 | 328 | debug(88, 5) ("clientGetsOldEntry: YES, modified since %ld\n", |
0655fa4d | 329 | (long int) http->request->ims); |
330 | return true; | |
edce4d98 | 331 | } |
62e76326 | 332 | |
edce4d98 | 333 | debug(88, 5) ("clientGetsOldEntry: NO, new one is fine\n"); |
0655fa4d | 334 | return false; |
edce4d98 | 335 | } |
336 | ||
528b2c61 | 337 | void |
338 | clientReplyContext::sendClientUpstreamResponse() | |
339 | { | |
340 | StoreIOBuffer tempresult; | |
341 | http->logType = LOG_TCP_REFRESH_MISS; | |
0655fa4d | 342 | removeStoreReference(&old_sc, &old_entry); |
528b2c61 | 343 | /* here the data to send is the data we just recieved */ |
344 | tempBuffer.offset = 0; | |
345 | old_reqsize = 0; | |
0655fa4d | 346 | /* sendMoreData tracks the offset as well. |
528b2c61 | 347 | * Force it back to zero */ |
348 | reqofs = 0; | |
86a2f789 | 349 | assert(!EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)); |
0655fa4d | 350 | /* TODO: provide sendMoreData with the ready parsed reply */ |
528b2c61 | 351 | tempresult.length = reqsize; |
352 | tempresult.data = tempbuf; | |
0655fa4d | 353 | sendMoreData(tempresult); |
528b2c61 | 354 | } |
355 | ||
edce4d98 | 356 | void |
0655fa4d | 357 | clientReplyContext::HandleIMSReply(void *data, StoreIOBuffer result) |
edce4d98 | 358 | { |
e6ccf245 | 359 | clientReplyContext *context = (clientReplyContext *)data; |
0655fa4d | 360 | context->handleIMSReply(result); |
361 | } | |
62e76326 | 362 | |
0655fa4d | 363 | void |
364 | clientReplyContext::sendClientOldEntry() | |
365 | { | |
366 | /* Get the old request back */ | |
367 | restoreState(); | |
368 | /* here the data to send is in the next nodes buffers already */ | |
86a2f789 | 369 | assert(!EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)); |
0655fa4d | 370 | /* sendMoreData tracks the offset as well. |
371 | * Force it back to zero */ | |
372 | reqofs = 0; | |
373 | StoreIOBuffer tempresult (reqsize, reqofs, next()->readBuffer.data); | |
374 | sendMoreData(tempresult); | |
375 | } | |
62e76326 | 376 | |
0655fa4d | 377 | void |
378 | clientReplyContext::cleanUpAfterIMSCheck() | |
379 | { | |
86a2f789 | 380 | debug(88, 3) ("clientHandleIMSReply: ABORTED '%s'\n", storeUrl(http->storeEntry())); |
0655fa4d | 381 | /* We have an existing entry, but failed to validate it */ |
382 | /* Its okay to send the old one anyway */ | |
383 | http->logType = LOG_TCP_REFRESH_FAIL_HIT; | |
384 | sendClientOldEntry(); | |
385 | } | |
62e76326 | 386 | |
0655fa4d | 387 | void |
388 | clientReplyContext::handlePartialIMSHeaders() | |
389 | { | |
390 | /* more headers needed to decide */ | |
391 | debug(88, 3) ("clientHandleIMSReply: Incomplete headers for '%s'\n", | |
86a2f789 | 392 | storeUrl(http->storeEntry())); |
0655fa4d | 393 | |
394 | if (reqsize >= HTTP_REQBUF_SZ) { | |
395 | /* will not get any bigger than that */ | |
396 | debug(88, 3) | |
397 | ("clientHandleIMSReply: Reply is too large '%s', using old entry\n", | |
86a2f789 | 398 | storeUrl(http->storeEntry())); |
0655fa4d | 399 | /* use old entry, this repeats the code above */ |
62e76326 | 400 | http->logType = LOG_TCP_REFRESH_FAIL_HIT; |
0655fa4d | 401 | sendClientOldEntry(); |
402 | } else { | |
403 | reqofs = reqsize; | |
404 | waitForMoreData(); | |
c8be6d7b | 405 | } |
0655fa4d | 406 | } |
62e76326 | 407 | |
0655fa4d | 408 | void |
409 | clientReplyContext::handleIMSGiveClientUpdatedOldEntry() | |
410 | { | |
411 | /* We initiated the IMS request and the IMS is compatible with | |
412 | * our object. As the client is not expecting | |
413 | * 304, so put the good one back. First, make sure the old entry | |
414 | * headers have been loaded from disk. */ | |
415 | http->logType = LOG_TCP_REFRESH_HIT; | |
416 | ||
86a2f789 | 417 | if (httpReplyValidatorsMatch(http->storeEntry()->getReply(), |
0655fa4d | 418 | old_entry->getReply())) { |
419 | int unlink_request = 0; | |
420 | ||
421 | if (old_entry->mem_obj->request == NULL) { | |
86a2f789 | 422 | old_entry->mem_obj->request = requestLink(http->memObject()->request); |
0655fa4d | 423 | unlink_request = 1; |
62e76326 | 424 | } |
425 | ||
0655fa4d | 426 | /* Don't memcpy() the whole reply structure here. For example, |
427 | * www.thegist.com (Netscape/1.13) returns a content-length for | |
428 | * 304's which seems to be the length of the 304 HEADERS!!! and | |
429 | * not the body they refer to. */ | |
86a2f789 | 430 | httpReplyUpdateOnNotModified((HttpReply *)old_entry->getReply(), http->storeEntry()->getReply()); |
62e76326 | 431 | |
0655fa4d | 432 | storeTimestampsSet(old_entry); |
62e76326 | 433 | |
0655fa4d | 434 | old_entry->timestamp = squid_curtime; |
62e76326 | 435 | |
0655fa4d | 436 | if (unlink_request) { |
437 | requestUnlink(old_entry->mem_obj->request); | |
438 | old_entry->mem_obj->request = NULL; | |
62e76326 | 439 | } |
0655fa4d | 440 | } |
62e76326 | 441 | |
0655fa4d | 442 | sendClientOldEntry(); |
443 | } | |
444 | ||
445 | void | |
446 | clientReplyContext::handleIMSGiveClientNewEntry() | |
447 | { | |
448 | /* The client gets the new entry, | |
449 | * either as a 304 (they initiated the IMS) or | |
450 | * as a full request from the upstream | |
451 | * The new entry is *not* a 304 reply, or | |
452 | * is a 304 that is incompatible with our cached entities. | |
453 | */ | |
62e76326 | 454 | |
0655fa4d | 455 | if (http->request->flags.ims) { |
456 | /* The client asked for a IMS, and can deal | |
457 | * with any reply | |
458 | * XXX TODO: invalidate our object if it's not valid any more. | |
459 | * Send the IMS reply to the client. | |
460 | */ | |
461 | sendClientUpstreamResponse(); | |
86a2f789 | 462 | } else if (httpReplyValidatorsMatch (http->storeEntry()->getReply(), |
0655fa4d | 463 | old_entry->getReply())) { |
464 | /* Our object is usable once updated */ | |
465 | /* the client did not ask for IMS, send the whole object | |
466 | */ | |
467 | /* the client needs to get this reply */ | |
468 | StoreIOBuffer tempresult; | |
469 | http->logType = LOG_TCP_REFRESH_MISS; | |
62e76326 | 470 | |
86a2f789 | 471 | if (HTTP_NOT_MODIFIED == http->storeEntry()->getReply()->sline.status) { |
0655fa4d | 472 | httpReplyUpdateOnNotModified((HttpReply *)old_entry->getReply(), |
86a2f789 | 473 | http->storeEntry()->getReply()); |
0655fa4d | 474 | storeTimestampsSet(old_entry); |
475 | http->logType = LOG_TCP_REFRESH_HIT; | |
476 | } | |
62e76326 | 477 | |
0655fa4d | 478 | removeStoreReference(&old_sc, &old_entry); |
479 | /* here the data to send is the data we just recieved */ | |
480 | tempBuffer.offset = 0; | |
481 | old_reqsize = 0; | |
482 | /* clientSendMoreData tracks the offset as well. | |
483 | * Force it back to zero */ | |
484 | reqofs = 0; | |
86a2f789 | 485 | assert(!EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)); |
0655fa4d | 486 | /* TODO: provide SendMoreData with the ready parsed reply */ |
487 | tempresult.length = reqsize; | |
488 | tempresult.data = tempbuf; | |
489 | sendMoreData(tempresult); | |
490 | } else { | |
491 | /* the client asked for the whole object, and | |
492 | * 1) our object was stale | |
493 | * 2) our internally generated IMS failed to validate | |
494 | * 3) the server sent incompatible headers in it's reply | |
495 | */ | |
496 | http->logType = LOG_TCP_REFRESH_MISS; | |
497 | processMiss(); | |
498 | /* We start over for everything except IMS because: | |
499 | * 1) HEAD requests will go straight through now | |
500 | * 2) GET requests will go straight through now | |
501 | * 3) IMS requests are a corner case. If the server | |
502 | * decided to give us different data, we should give | |
503 | * that to the client, which means returning our IMS request. | |
504 | */ | |
505 | } | |
506 | } | |
62e76326 | 507 | |
0655fa4d | 508 | void |
509 | clientReplyContext::handleIMSReply(StoreIOBuffer result) | |
510 | { | |
045a76ab | 511 | if (deleting) |
512 | return; | |
513 | ||
0655fa4d | 514 | debug(88, 3) ("clientHandleIMSReply: %s, %lu bytes\n", |
86a2f789 | 515 | storeUrl(http->storeEntry()), |
0655fa4d | 516 | (long unsigned) result.length); |
62e76326 | 517 | |
86a2f789 | 518 | if (http->storeEntry() == NULL) |
0655fa4d | 519 | return; |
62e76326 | 520 | |
86a2f789 | 521 | if (result.flags.error && !EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) |
62e76326 | 522 | return; |
62e76326 | 523 | |
0655fa4d | 524 | /* update size of the request */ |
525 | reqsize = result.length + reqofs; | |
62e76326 | 526 | |
86a2f789 | 527 | http_status status = http->storeEntry()->getReply()->sline.status; |
62e76326 | 528 | |
86a2f789 | 529 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) |
0655fa4d | 530 | cleanUpAfterIMSCheck(); |
86a2f789 | 531 | else if (STORE_PENDING == http->storeEntry()->store_status && 0 == status) |
0655fa4d | 532 | handlePartialIMSHeaders(); |
533 | else if (clientGetsOldEntry()) | |
534 | handleIMSGiveClientUpdatedOldEntry(); | |
535 | else | |
536 | handleIMSGiveClientNewEntry(); | |
edce4d98 | 537 | } |
538 | ||
e6ccf245 | 539 | extern "C" CSR clientGetMoreData; |
540 | extern "C" CSD clientReplyDetach; | |
edce4d98 | 541 | |
542 | /* | |
543 | * clientCacheHit should only be called until the HTTP reply headers | |
544 | * have been parsed. Normally this should be a single call, but | |
545 | * it might take more than one. As soon as we have the headers, | |
0655fa4d | 546 | * we hand off to clientSendMoreData, processExpired, or |
547 | * processMiss. | |
edce4d98 | 548 | */ |
549 | void | |
0655fa4d | 550 | clientReplyContext::CacheHit(void *data, StoreIOBuffer result) |
edce4d98 | 551 | { |
e6ccf245 | 552 | clientReplyContext *context = (clientReplyContext *)data; |
0655fa4d | 553 | context->cacheHit (result); |
554 | } | |
555 | ||
556 | void | |
557 | clientReplyContext::cacheHit(StoreIOBuffer result) | |
558 | { | |
045a76ab | 559 | if (deleting) |
560 | return; | |
561 | ||
86a2f789 | 562 | StoreEntry *e = http->storeEntry(); |
045a76ab | 563 | |
edce4d98 | 564 | request_t *r = http->request; |
045a76ab | 565 | |
c4b7a5a9 | 566 | debug(88, 3) ("clientCacheHit: %s, %ud bytes\n", http->uri, (unsigned int)result.length); |
62e76326 | 567 | |
86a2f789 | 568 | if (http->storeEntry() == NULL) { |
62e76326 | 569 | debug(88, 3) ("clientCacheHit: request aborted\n"); |
570 | return; | |
c8be6d7b | 571 | } else if (result.flags.error) { |
62e76326 | 572 | /* swap in failure */ |
573 | debug(88, 3) ("clientCacheHit: swapin failure for %s\n", http->uri); | |
574 | http->logType = LOG_TCP_SWAPFAIL_MISS; | |
86a2f789 | 575 | removeClientStoreReference(&sc, http); |
0655fa4d | 576 | processMiss(); |
62e76326 | 577 | return; |
edce4d98 | 578 | } |
62e76326 | 579 | |
d3b3ab85 | 580 | if (result.length == 0) { |
62e76326 | 581 | /* the store couldn't get enough data from the file for us to id the |
582 | * object | |
583 | */ | |
584 | /* treat as a miss */ | |
585 | http->logType = LOG_TCP_MISS; | |
0655fa4d | 586 | processMiss(); |
62e76326 | 587 | return; |
d3b3ab85 | 588 | } |
62e76326 | 589 | |
edce4d98 | 590 | assert(!EBIT_TEST(e->flags, ENTRY_ABORTED)); |
591 | /* update size of the request */ | |
0655fa4d | 592 | reqsize = result.length + reqofs; |
62e76326 | 593 | |
528b2c61 | 594 | if (e->getReply()->sline.status == 0) { |
62e76326 | 595 | /* |
596 | * we don't have full reply headers yet; either wait for more or | |
597 | * punt to clientProcessMiss. | |
598 | */ | |
599 | ||
600 | if (e->mem_status == IN_MEMORY || e->store_status == STORE_OK) { | |
0655fa4d | 601 | processMiss(); |
602 | } else if (result.length + reqofs >= HTTP_REQBUF_SZ | |
62e76326 | 603 | && http->out.offset == 0) { |
0655fa4d | 604 | processMiss(); |
62e76326 | 605 | } else { |
62e76326 | 606 | debug(88, 3) ("clientCacheHit: waiting for HTTP reply headers\n"); |
0655fa4d | 607 | reqofs += result.length; |
608 | assert(reqofs <= HTTP_REQBUF_SZ); | |
62e76326 | 609 | /* get the next users' buffer */ |
0655fa4d | 610 | StoreIOBuffer tempBuffer; |
611 | tempBuffer.offset = http->out.offset + reqofs; | |
612 | tempBuffer.length = next()->readBuffer.length - reqofs; | |
613 | tempBuffer.data = next()->readBuffer.data + reqofs; | |
614 | storeClientCopy(sc, e, | |
615 | tempBuffer, CacheHit, this); | |
62e76326 | 616 | } |
617 | ||
618 | return; | |
edce4d98 | 619 | } |
62e76326 | 620 | |
edce4d98 | 621 | /* |
622 | * Got the headers, now grok them | |
623 | */ | |
29b8d8d6 | 624 | assert(http->logType == LOG_TCP_HIT); |
62e76326 | 625 | |
edce4d98 | 626 | switch (varyEvaluateMatch(e, r)) { |
62e76326 | 627 | |
edce4d98 | 628 | case VARY_NONE: |
62e76326 | 629 | /* No variance detected. Continue as normal */ |
630 | break; | |
631 | ||
edce4d98 | 632 | case VARY_MATCH: |
62e76326 | 633 | /* This is the correct entity for this request. Continue */ |
634 | debug(88, 2) ("clientProcessHit: Vary MATCH!\n"); | |
635 | break; | |
636 | ||
edce4d98 | 637 | case VARY_OTHER: |
62e76326 | 638 | /* This is not the correct entity for this request. We need |
639 | * to requery the cache. | |
640 | */ | |
86a2f789 | 641 | removeClientStoreReference(&sc, http); |
62e76326 | 642 | e = NULL; |
643 | /* Note: varyEvalyateMatch updates the request with vary information | |
644 | * so we only get here once. (it also takes care of cancelling loops) | |
645 | */ | |
646 | debug(88, 2) ("clientProcessHit: Vary detected!\n"); | |
0655fa4d | 647 | clientGetMoreData(ourNode, http); |
62e76326 | 648 | return; |
649 | ||
edce4d98 | 650 | case VARY_CANCEL: |
62e76326 | 651 | /* varyEvaluateMatch found a object loop. Process as miss */ |
652 | debug(88, 1) ("clientProcessHit: Vary object loop!\n"); | |
0655fa4d | 653 | processMiss(); |
62e76326 | 654 | return; |
edce4d98 | 655 | } |
62e76326 | 656 | |
edce4d98 | 657 | if (r->method == METHOD_PURGE) { |
86a2f789 | 658 | removeClientStoreReference(&sc, http); |
62e76326 | 659 | e = NULL; |
0655fa4d | 660 | purgeRequest(); |
62e76326 | 661 | return; |
edce4d98 | 662 | } |
62e76326 | 663 | |
edce4d98 | 664 | if (storeCheckNegativeHit(e)) { |
62e76326 | 665 | http->logType = LOG_TCP_NEGATIVE_HIT; |
0655fa4d | 666 | sendMoreData(result); |
f7cf9b8c | 667 | } else if (!Config.onoff.offline && refreshCheckHTTP(e, r) && !http->flags.internal) { |
62e76326 | 668 | debug(88, 5) ("clientCacheHit: in refreshCheck() block\n"); |
669 | /* | |
670 | * We hold a stale copy; it needs to be validated | |
671 | */ | |
672 | /* | |
673 | * The 'need_validation' flag is used to prevent forwarding | |
674 | * loops between siblings. If our copy of the object is stale, | |
675 | * then we should probably only use parents for the validation | |
676 | * request. Otherwise two siblings could generate a loop if | |
677 | * both have a stale version of the object. | |
678 | */ | |
679 | r->flags.need_validation = 1; | |
680 | ||
681 | if (e->lastmod < 0) { | |
682 | /* | |
683 | * Previous reply didn't have a Last-Modified header, | |
684 | * we cannot revalidate it. | |
685 | */ | |
686 | http->logType = LOG_TCP_MISS; | |
0655fa4d | 687 | processMiss(); |
62e76326 | 688 | } else if (r->flags.nocache) { |
689 | /* | |
690 | * This did not match a refresh pattern that overrides no-cache | |
691 | * we should honour the client no-cache header. | |
692 | */ | |
693 | http->logType = LOG_TCP_CLIENT_REFRESH_MISS; | |
0655fa4d | 694 | processMiss(); |
62e76326 | 695 | } else if (r->protocol == PROTO_HTTP) { |
696 | /* | |
697 | * Object needs to be revalidated | |
698 | * XXX This could apply to FTP as well, if Last-Modified is known. | |
699 | */ | |
700 | http->logType = LOG_TCP_REFRESH_MISS; | |
0655fa4d | 701 | processExpired(); |
62e76326 | 702 | } else { |
703 | /* | |
704 | * We don't know how to re-validate other protocols. Handle | |
705 | * them as if the object has expired. | |
706 | */ | |
707 | http->logType = LOG_TCP_MISS; | |
0655fa4d | 708 | processMiss(); |
62e76326 | 709 | } |
edce4d98 | 710 | } else if (r->flags.ims) { |
62e76326 | 711 | /* |
712 | * Handle If-Modified-Since requests from the client | |
713 | */ | |
714 | ||
715 | if (e->getReply()->sline.status != HTTP_OK) { | |
716 | debug(88, 4) ("clientCacheHit: Reply code %d != 200\n", | |
717 | e->getReply()->sline.status); | |
718 | http->logType = LOG_TCP_MISS; | |
0655fa4d | 719 | processMiss(); |
720 | } else if (e->modifiedSince(http->request)) { | |
62e76326 | 721 | http->logType = LOG_TCP_IMS_HIT; |
0655fa4d | 722 | sendMoreData(result); |
62e76326 | 723 | } else { |
0655fa4d | 724 | time_t const timestamp = e->timestamp; |
62e76326 | 725 | HttpReply *temprep = httpReplyMake304 (e->getReply()); |
726 | http->logType = LOG_TCP_IMS_HIT; | |
86a2f789 | 727 | removeClientStoreReference(&sc, http); |
0655fa4d | 728 | createStoreEntry(http->request->method, |
729 | request_flags()); | |
86a2f789 | 730 | e = http->storeEntry(); |
62e76326 | 731 | /* |
732 | * Copy timestamp from the original entry so the 304 | |
733 | * reply has a meaningful Age: header. | |
734 | */ | |
735 | e->timestamp = timestamp; | |
736 | httpReplySwapOut (temprep, e); | |
737 | e->complete(); | |
738 | /* TODO: why put this in the store and then serialise it and then parse it again. | |
739 | * Simply mark the request complete in our context and | |
740 | * write the reply struct to the client side | |
741 | */ | |
0655fa4d | 742 | triggerInitialStoreRead(); |
62e76326 | 743 | } |
edce4d98 | 744 | } else { |
62e76326 | 745 | /* |
746 | * plain ol' cache hit | |
747 | */ | |
748 | ||
749 | if (e->mem_status == IN_MEMORY) | |
750 | http->logType = LOG_TCP_MEM_HIT; | |
751 | else if (Config.onoff.offline) | |
752 | http->logType = LOG_TCP_OFFLINE_HIT; | |
753 | ||
0655fa4d | 754 | sendMoreData(result); |
edce4d98 | 755 | } |
756 | } | |
757 | ||
758 | /* | |
759 | * Prepare to fetch the object as it's a cache miss of some kind. | |
760 | */ | |
761 | void | |
0655fa4d | 762 | clientReplyContext::processMiss() |
edce4d98 | 763 | { |
edce4d98 | 764 | char *url = http->uri; |
765 | request_t *r = http->request; | |
766 | ErrorState *err = NULL; | |
767 | debug(88, 4) ("clientProcessMiss: '%s %s'\n", | |
62e76326 | 768 | RequestMethodStr[r->method], url); |
edce4d98 | 769 | /* |
770 | * We might have a left-over StoreEntry from a failed cache hit | |
771 | * or IMS request. | |
772 | */ | |
62e76326 | 773 | |
86a2f789 | 774 | if (http->storeEntry()) { |
775 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_SPECIAL)) { | |
62e76326 | 776 | debug(88, 0) ("clientProcessMiss: miss on a special object (%s).\n", |
777 | url); | |
778 | debug(88, 0) ("\tlog_type = %s\n", log_tags[http->logType]); | |
86a2f789 | 779 | storeEntryDump(http->storeEntry(), 1); |
62e76326 | 780 | } |
781 | ||
86a2f789 | 782 | removeClientStoreReference(&sc, http); |
edce4d98 | 783 | } |
62e76326 | 784 | |
edce4d98 | 785 | if (r->method == METHOD_PURGE) { |
0655fa4d | 786 | purgeRequest(); |
62e76326 | 787 | return; |
edce4d98 | 788 | } |
62e76326 | 789 | |
0655fa4d | 790 | if (http->onlyIfCached()) { |
791 | processOnlyIfCachedMiss(); | |
62e76326 | 792 | return; |
edce4d98 | 793 | } |
62e76326 | 794 | |
edce4d98 | 795 | /* |
796 | * Deny loops when running in accelerator/transproxy mode. | |
797 | */ | |
798 | if (http->flags.accel && r->flags.loopdetect) { | |
62e76326 | 799 | http->al.http.code = HTTP_FORBIDDEN; |
800 | err = | |
801 | clientBuildError(ERR_ACCESS_DENIED, HTTP_FORBIDDEN, NULL, | |
98242069 | 802 | &http->getConn()->peer.sin_addr, http->request); |
0655fa4d | 803 | createStoreEntry(r->method, request_flags()); |
86a2f789 | 804 | errorAppendEntry(http->storeEntry(), err); |
0655fa4d | 805 | triggerInitialStoreRead(); |
62e76326 | 806 | return; |
edce4d98 | 807 | } else { |
62e76326 | 808 | assert(http->out.offset == 0); |
0655fa4d | 809 | createStoreEntry(r->method, r->flags); |
810 | triggerInitialStoreRead(); | |
62e76326 | 811 | |
812 | if (http->redirect.status) { | |
813 | HttpReply *rep = httpReplyCreate(); | |
edce4d98 | 814 | #if LOG_TCP_REDIRECTS |
62e76326 | 815 | |
816 | http->logType = LOG_TCP_REDIRECT; | |
edce4d98 | 817 | #endif |
62e76326 | 818 | |
86a2f789 | 819 | storeReleaseRequest(http->storeEntry()); |
62e76326 | 820 | httpRedirectReply(rep, http->redirect.status, |
821 | http->redirect.location); | |
86a2f789 | 822 | httpReplySwapOut(rep, http->storeEntry()); |
823 | http->storeEntry()->complete(); | |
62e76326 | 824 | return; |
825 | } | |
826 | ||
827 | if (http->flags.internal) | |
828 | r->protocol = PROTO_INTERNAL; | |
829 | ||
a2ac85d9 | 830 | fwdStart(http->getConn().getRaw() != NULL ? http->getConn()->fd : -1, http->storeEntry(), r); |
edce4d98 | 831 | } |
832 | } | |
833 | ||
834 | /* | |
835 | * client issued a request with an only-if-cached cache-control directive; | |
836 | * we did not find a cached object that can be returned without | |
837 | * contacting other servers; | |
838 | * respond with a 504 (Gateway Timeout) as suggested in [RFC 2068] | |
839 | */ | |
0655fa4d | 840 | void |
841 | clientReplyContext::processOnlyIfCachedMiss() | |
edce4d98 | 842 | { |
edce4d98 | 843 | ErrorState *err = NULL; |
edce4d98 | 844 | debug(88, 4) ("clientProcessOnlyIfCachedMiss: '%s %s'\n", |
0655fa4d | 845 | RequestMethodStr[http->request->method], http->uri); |
edce4d98 | 846 | http->al.http.code = HTTP_GATEWAY_TIMEOUT; |
847 | err = clientBuildError(ERR_ONLY_IF_CACHED_MISS, HTTP_GATEWAY_TIMEOUT, NULL, | |
98242069 | 848 | &http->getConn()->peer.sin_addr, http->request); |
86a2f789 | 849 | removeClientStoreReference(&sc, http); |
0655fa4d | 850 | startError(err); |
edce4d98 | 851 | } |
852 | ||
853 | void | |
e6ccf245 | 854 | clientReplyContext::purgeRequestFindObjectToPurge() |
855 | { | |
856 | /* Try to find a base entry */ | |
857 | http->flags.purging = 1; | |
858 | lookingforstore = 1; | |
3b13a8fd | 859 | StoreEntry::getPublicByRequestMethod(this, http->request, METHOD_GET); |
e6ccf245 | 860 | } |
861 | ||
862 | void | |
3b13a8fd | 863 | clientReplyContext::created(StoreEntry *newEntry) |
e6ccf245 | 864 | { |
865 | if (lookingforstore == 1) | |
62e76326 | 866 | purgeFoundGet(newEntry); |
e6ccf245 | 867 | else if (lookingforstore == 2) |
62e76326 | 868 | purgeFoundHead(newEntry); |
e6ccf245 | 869 | else if (lookingforstore == 3) |
62e76326 | 870 | purgeDoPurgeGet(newEntry); |
e6ccf245 | 871 | else if (lookingforstore == 4) |
62e76326 | 872 | purgeDoPurgeHead(newEntry); |
e6ccf245 | 873 | else if (lookingforstore == 5) |
62e76326 | 874 | identifyFoundObject(newEntry); |
e6ccf245 | 875 | } |
876 | ||
877 | void | |
3b13a8fd | 878 | clientReplyContext::purgeFoundGet(StoreEntry *newEntry) |
e6ccf245 | 879 | { |
880 | if (newEntry->isNull()) { | |
62e76326 | 881 | lookingforstore = 2; |
882 | StoreEntry::getPublicByRequestMethod(this, http->request, METHOD_HEAD); | |
e6ccf245 | 883 | } else |
62e76326 | 884 | purgeFoundObject (newEntry); |
e6ccf245 | 885 | } |
886 | ||
887 | void | |
3b13a8fd | 888 | clientReplyContext::purgeFoundHead(StoreEntry *newEntry) |
e6ccf245 | 889 | { |
890 | if (newEntry->isNull()) | |
62e76326 | 891 | purgeDoMissPurge(); |
e6ccf245 | 892 | else |
62e76326 | 893 | purgeFoundObject (newEntry); |
e6ccf245 | 894 | } |
62e76326 | 895 | |
e6ccf245 | 896 | void |
3b13a8fd | 897 | clientReplyContext::purgeFoundObject(StoreEntry *entry) |
e6ccf245 | 898 | { |
899 | assert (entry && !entry->isNull()); | |
62e76326 | 900 | StoreIOBuffer tempBuffer; |
901 | /* Swap in the metadata */ | |
86a2f789 | 902 | http->storeEntry(entry); |
903 | storeLockObject(http->storeEntry()); | |
904 | storeCreateMemObject(http->storeEntry(), http->uri, http->log_uri); | |
905 | http->storeEntry()->mem_obj->method = http->request->method; | |
906 | sc = storeClientListAdd(http->storeEntry(), this); | |
62e76326 | 907 | http->logType = LOG_TCP_HIT; |
908 | reqofs = 0; | |
909 | tempBuffer.offset = http->out.offset; | |
0655fa4d | 910 | tempBuffer.length = next()->readBuffer.length; |
911 | tempBuffer.data = next()->readBuffer.data; | |
86a2f789 | 912 | storeClientCopy(sc, http->storeEntry(), |
0655fa4d | 913 | tempBuffer, CacheHit, this); |
e6ccf245 | 914 | } |
915 | ||
916 | void | |
917 | clientReplyContext::purgeRequest() | |
edce4d98 | 918 | { |
edce4d98 | 919 | debug(88, 3) ("Config2.onoff.enable_purge = %d\n", |
62e76326 | 920 | Config2.onoff.enable_purge); |
921 | ||
edce4d98 | 922 | if (!Config2.onoff.enable_purge) { |
62e76326 | 923 | http->logType = LOG_TCP_DENIED; |
924 | ErrorState *err = | |
925 | clientBuildError(ERR_ACCESS_DENIED, HTTP_FORBIDDEN, NULL, | |
98242069 | 926 | &http->getConn()->peer.sin_addr, http->request); |
0655fa4d | 927 | startError(err); |
62e76326 | 928 | return; |
edce4d98 | 929 | } |
62e76326 | 930 | |
edce4d98 | 931 | /* Release both IP cache */ |
932 | ipcacheInvalidate(http->request->host); | |
933 | ||
e6ccf245 | 934 | if (!http->flags.purging) |
62e76326 | 935 | purgeRequestFindObjectToPurge(); |
e6ccf245 | 936 | else |
62e76326 | 937 | purgeDoMissPurge(); |
e6ccf245 | 938 | } |
939 | ||
940 | void | |
941 | clientReplyContext::purgeDoMissPurge() | |
942 | { | |
29b8d8d6 | 943 | http->logType = LOG_TCP_MISS; |
e6ccf245 | 944 | lookingforstore = 3; |
3b13a8fd | 945 | StoreEntry::getPublicByRequestMethod(this,http->request, METHOD_GET); |
e6ccf245 | 946 | } |
947 | ||
948 | void | |
3b13a8fd | 949 | clientReplyContext::purgeDoPurgeGet(StoreEntry *newEntry) |
e6ccf245 | 950 | { |
951 | assert (newEntry); | |
952 | /* Move to new() when that is created */ | |
953 | purgeStatus = HTTP_NOT_FOUND; | |
954 | ||
955 | if (!newEntry->isNull()) { | |
62e76326 | 956 | /* Release the cached URI */ |
957 | debug(88, 4) ("clientPurgeRequest: GET '%s'\n", storeUrl(newEntry)); | |
958 | storeRelease(newEntry); | |
959 | purgeStatus = HTTP_OK; | |
edce4d98 | 960 | } |
62e76326 | 961 | |
e6ccf245 | 962 | lookingforstore = 4; |
3b13a8fd | 963 | StoreEntry::getPublicByRequestMethod(this, http->request, METHOD_HEAD); |
e6ccf245 | 964 | } |
965 | ||
966 | void | |
3b13a8fd | 967 | clientReplyContext::purgeDoPurgeHead(StoreEntry *newEntry) |
e6ccf245 | 968 | { |
4fc0ac76 | 969 | if (newEntry && !newEntry->isNull()) { |
62e76326 | 970 | debug(88, 4) ("clientPurgeRequest: HEAD '%s'\n", storeUrl(newEntry)); |
971 | storeRelease(newEntry); | |
972 | purgeStatus = HTTP_OK; | |
edce4d98 | 973 | } |
62e76326 | 974 | |
e6ccf245 | 975 | HttpReply *r; |
976 | http_version_t version; | |
62e76326 | 977 | |
edce4d98 | 978 | /* And for Vary, release the base URI if none of the headers was included in the request */ |
62e76326 | 979 | |
edce4d98 | 980 | if (http->request->vary_headers |
62e76326 | 981 | && !strstr(http->request->vary_headers, "=")) { |
982 | StoreEntry *entry = storeGetPublic(urlCanonical(http->request), METHOD_GET); | |
983 | ||
984 | if (entry) { | |
985 | debug(88, 4) ("clientPurgeRequest: Vary GET '%s'\n", | |
986 | storeUrl(entry)); | |
987 | storeRelease(entry); | |
988 | purgeStatus = HTTP_OK; | |
989 | } | |
990 | ||
991 | entry = storeGetPublic(urlCanonical(http->request), METHOD_HEAD); | |
992 | ||
993 | if (entry) { | |
994 | debug(88, 4) ("clientPurgeRequest: Vary HEAD '%s'\n", | |
995 | storeUrl(entry)); | |
996 | storeRelease(entry); | |
997 | purgeStatus = HTTP_OK; | |
998 | } | |
edce4d98 | 999 | } |
62e76326 | 1000 | |
edce4d98 | 1001 | /* |
1002 | * Make a new entry to hold the reply to be written | |
1003 | * to the client. | |
1004 | */ | |
528b2c61 | 1005 | /* FIXME: This doesn't need to go through the store. Simply |
1006 | * push down the client chain | |
1007 | */ | |
0655fa4d | 1008 | createStoreEntry(http->request->method, request_flags()); |
62e76326 | 1009 | |
0655fa4d | 1010 | triggerInitialStoreRead(); |
62e76326 | 1011 | |
528b2c61 | 1012 | r = httpReplyCreate(); |
62e76326 | 1013 | |
edce4d98 | 1014 | httpBuildVersion(&version, 1, 0); |
62e76326 | 1015 | |
e6ccf245 | 1016 | httpReplySetHeaders(r, version, purgeStatus, NULL, NULL, 0, 0, -1); |
62e76326 | 1017 | |
86a2f789 | 1018 | httpReplySwapOut(r, http->storeEntry()); |
62e76326 | 1019 | |
86a2f789 | 1020 | http->storeEntry()->complete(); |
edce4d98 | 1021 | } |
1022 | ||
1023 | void | |
0655fa4d | 1024 | clientReplyContext::traceReply(clientStreamNode * node) |
edce4d98 | 1025 | { |
1026 | HttpReply *rep; | |
1027 | http_version_t version; | |
e6ccf245 | 1028 | clientStreamNode *next = (clientStreamNode *)node->node.next->data; |
528b2c61 | 1029 | StoreIOBuffer tempBuffer; |
0655fa4d | 1030 | assert(http->request->max_forwards == 0); |
1031 | createStoreEntry(http->request->method, request_flags()); | |
1032 | tempBuffer.offset = next->readBuffer.offset + headers_sz; | |
c8be6d7b | 1033 | tempBuffer.length = next->readBuffer.length; |
1034 | tempBuffer.data = next->readBuffer.data; | |
86a2f789 | 1035 | storeClientCopy(sc, http->storeEntry(), |
0655fa4d | 1036 | tempBuffer, SendMoreData, this); |
86a2f789 | 1037 | storeReleaseRequest(http->storeEntry()); |
1038 | storeBuffer(http->storeEntry()); | |
edce4d98 | 1039 | rep = httpReplyCreate(); |
1040 | httpBuildVersion(&version, 1, 0); | |
1041 | httpReplySetHeaders(rep, version, HTTP_OK, NULL, "text/plain", | |
0655fa4d | 1042 | httpRequestPrefixLen(http->request), 0, squid_curtime); |
86a2f789 | 1043 | httpReplySwapOut(rep, http->storeEntry()); |
1044 | httpRequestSwapOut(http->request, http->storeEntry()); | |
1045 | http->storeEntry()->complete(); | |
edce4d98 | 1046 | } |
1047 | ||
1048 | #define SENDING_BODY 0 | |
1049 | #define SENDING_HDRSONLY 1 | |
1050 | int | |
0655fa4d | 1051 | clientReplyContext::checkTransferDone() |
edce4d98 | 1052 | { |
86a2f789 | 1053 | StoreEntry *entry = http->storeEntry(); |
62e76326 | 1054 | |
edce4d98 | 1055 | if (entry == NULL) |
62e76326 | 1056 | return 0; |
1057 | ||
1058 | /* | |
edce4d98 | 1059 | * For now, 'done_copying' is used for special cases like |
1060 | * Range and HEAD requests. | |
1061 | */ | |
0655fa4d | 1062 | if (http->flags.done_copying) |
62e76326 | 1063 | return 1; |
1064 | ||
edce4d98 | 1065 | /* |
1066 | * Handle STORE_OK objects. | |
1067 | * objectLen(entry) will be set proprely. | |
1068 | * RC: Does objectLen(entry) include the Headers? | |
0e3be1ea | 1069 | * RC: Yes. |
edce4d98 | 1070 | */ |
1071 | if (entry->store_status == STORE_OK) { | |
0655fa4d | 1072 | return storeOKTransferDone(); |
e39b9382 | 1073 | } else { |
0655fa4d | 1074 | return storeNotOKTransferDone(); |
edce4d98 | 1075 | } |
e39b9382 | 1076 | } |
1077 | ||
1078 | int | |
1079 | clientReplyContext::storeOKTransferDone() const | |
1080 | { | |
86a2f789 | 1081 | if (http->out.offset >= objectLen(http->storeEntry()) - headers_sz) |
62e76326 | 1082 | return 1; |
1083 | ||
e39b9382 | 1084 | return 0; |
1085 | } | |
1086 | ||
1087 | int | |
1088 | clientReplyContext::storeNotOKTransferDone() const | |
1089 | { | |
edce4d98 | 1090 | /* |
1091 | * Now, handle STORE_PENDING objects | |
1092 | */ | |
86a2f789 | 1093 | MemObject *mem = http->storeEntry()->mem_obj; |
edce4d98 | 1094 | assert(mem != NULL); |
1095 | assert(http->request != NULL); | |
0e3be1ea | 1096 | /* mem->reply was wrong because it uses the UPSTREAM header length!!! */ |
0353e724 | 1097 | HttpReply const *reply = mem->getReply(); |
62e76326 | 1098 | |
e39b9382 | 1099 | if (headers_sz == 0) |
62e76326 | 1100 | /* haven't found end of headers yet */ |
1101 | return 0; | |
e39b9382 | 1102 | |
1103 | int sending = SENDING_BODY; | |
62e76326 | 1104 | |
e39b9382 | 1105 | if (reply->sline.status == HTTP_NO_CONTENT || |
62e76326 | 1106 | reply->sline.status == HTTP_NOT_MODIFIED || |
1107 | reply->sline.status < HTTP_OK || | |
1108 | http->request->method == METHOD_HEAD) | |
1109 | sending = SENDING_HDRSONLY; | |
1110 | ||
edce4d98 | 1111 | /* |
1112 | * Figure out how much data we are supposed to send. | |
1113 | * If we are sending a body and we don't have a content-length, | |
1114 | * then we must wait for the object to become STORE_OK. | |
1115 | */ | |
0e3be1ea | 1116 | if (reply->content_length < 0) |
62e76326 | 1117 | return 0; |
e39b9382 | 1118 | |
1119 | size_t expectedLength = http->out.headers_sz + reply->content_length; | |
62e76326 | 1120 | |
e39b9382 | 1121 | if (http->out.size < expectedLength) |
62e76326 | 1122 | return 0; |
edce4d98 | 1123 | else |
62e76326 | 1124 | return 1; |
edce4d98 | 1125 | } |
1126 | ||
1127 | ||
edce4d98 | 1128 | /* A write has completed, what is the next status based on the |
1129 | * canonical request data? | |
1130 | * 1 something is wrong | |
1131 | * 0 nothing is wrong. | |
1132 | * | |
1133 | */ | |
1134 | int | |
1135 | clientHttpRequestStatus(int fd, clientHttpRequest const *http) | |
1136 | { | |
1137 | #if SIZEOF_SIZE_T == 4 | |
62e76326 | 1138 | |
edce4d98 | 1139 | if (http->out.size > 0x7FFF0000) { |
62e76326 | 1140 | debug(88, 1) ("WARNING: closing FD %d to prevent counter overflow\n", |
1141 | fd); | |
1142 | debug(88, 1) ("\tclient %s\n", | |
a2ac85d9 | 1143 | inet_ntoa(http->getConn().getRaw() != NULL ? http->getConn()->peer.sin_addr : no_addr)); |
62e76326 | 1144 | debug(88, 1) ("\treceived %d bytes\n", (int) http->out.size); |
1145 | debug(88, 1) ("\tURI %s\n", http->log_uri); | |
1146 | return 1; | |
edce4d98 | 1147 | } |
62e76326 | 1148 | |
edce4d98 | 1149 | #endif |
1150 | #if SIZEOF_OFF_T == 4 | |
1151 | if (http->out.offset > 0x7FFF0000) { | |
62e76326 | 1152 | debug(88, 1) ("WARNING: closing FD %d to prevent counter overflow\n", |
1153 | fd); | |
1154 | debug(88, 1) ("\tclient %s\n", | |
a2ac85d9 | 1155 | inet_ntoa(http->getConn().getRaw() != NULL ? http->getConn()->peer.sin_addr : no_addr)); |
62e76326 | 1156 | debug(88, 1) ("\treceived %d bytes (offset %d)\n", (int) http->out.size, |
1157 | (int) http->out.offset); | |
1158 | debug(88, 1) ("\tURI %s\n", http->log_uri); | |
1159 | return 1; | |
edce4d98 | 1160 | } |
62e76326 | 1161 | |
edce4d98 | 1162 | #endif |
1163 | return 0; | |
1164 | } | |
1165 | ||
62e76326 | 1166 | /* Preconditions: |
edce4d98 | 1167 | * *http is a valid structure. |
1168 | * fd is either -1, or an open fd. | |
1169 | * | |
1170 | * TODO: enumify this | |
1171 | * | |
1172 | * This function is used by any http request sink, to determine the status | |
1173 | * of the object. | |
1174 | */ | |
1175 | clientStream_status_t | |
e6ccf245 | 1176 | clientReplyStatus(clientStreamNode * aNode, clientHttpRequest * http) |
edce4d98 | 1177 | { |
0655fa4d | 1178 | clientReplyContext *context = dynamic_cast<clientReplyContext *>(aNode->data.getRaw()); |
1179 | assert (context); | |
1180 | assert (context->http == http); | |
1181 | return context->replyStatus(); | |
1182 | } | |
1183 | ||
1184 | clientStream_status_t | |
1185 | clientReplyContext::replyStatus() | |
1186 | { | |
edce4d98 | 1187 | int done; |
1188 | /* Here because lower nodes don't need it */ | |
62e76326 | 1189 | |
86a2f789 | 1190 | if (http->storeEntry() == NULL) |
62e76326 | 1191 | return STREAM_FAILED; /* yuck, but what can we do? */ |
1192 | ||
86a2f789 | 1193 | if (EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) |
62e76326 | 1194 | /* TODO: Could upstream read errors (result.flags.error) be |
1195 | * lost, and result in undersize requests being considered | |
1196 | * complete. Should we tcp reset such connections ? | |
1197 | */ | |
1198 | return STREAM_FAILED; | |
1199 | ||
0655fa4d | 1200 | if ((done = checkTransferDone()) != 0 || flags.complete) { |
62e76326 | 1201 | debug(88, 5) ("clientReplyStatus: transfer is DONE\n"); |
1202 | /* Ok we're finished, but how? */ | |
1203 | ||
1204 | if (httpReplyBodySize(http->request->method, | |
86a2f789 | 1205 | http->storeEntry()->getReply()) < 0) { |
62e76326 | 1206 | debug(88, 5) ("clientReplyStatus: closing, content_length < 0\n"); |
1207 | return STREAM_FAILED; | |
1208 | } | |
1209 | ||
1210 | if (!done) { | |
1211 | debug(88, 5) ("clientReplyStatus: closing, !done, but read 0 bytes\n"); | |
1212 | return STREAM_FAILED; | |
1213 | } | |
1214 | ||
0655fa4d | 1215 | if (!http->gotEnough()) { |
62e76326 | 1216 | debug(88, 5) ("clientReplyStatus: client didn't get all it expected\n"); |
1217 | return STREAM_UNPLANNED_COMPLETE; | |
1218 | } | |
1219 | ||
1220 | if (http->request->flags.proxy_keepalive) { | |
1221 | debug(88, 5) ("clientReplyStatus: stream complete and can keepalive\n"); | |
1222 | return STREAM_COMPLETE; | |
1223 | } | |
1224 | ||
1225 | debug(88, 5) ("clientReplyStatus: stream was not expected to complete!\n"); | |
1226 | return STREAM_UNPLANNED_COMPLETE; | |
edce4d98 | 1227 | } |
62e76326 | 1228 | |
b51aec66 | 1229 | if (http->isReplyBodyTooLarge(http->out.offset - 4096)) { |
1230 | /* 4096 is a margin for the HTTP headers included in out.offset */ | |
62e76326 | 1231 | debug(88, 5) ("clientReplyStatus: client reply body is too large\n"); |
1232 | return STREAM_FAILED; | |
0e3be1ea | 1233 | } |
62e76326 | 1234 | |
edce4d98 | 1235 | return STREAM_NONE; |
1236 | } | |
1237 | ||
62e76326 | 1238 | /* Responses with no body will not have a content-type header, |
edce4d98 | 1239 | * which breaks the rep_mime_type acl, which |
1240 | * coincidentally, is the most common acl for reply access lists. | |
1241 | * A better long term fix for this is to allow acl matchs on the various | |
1242 | * status codes, and then supply a default ruleset that puts these | |
1243 | * codes before any user defines access entries. That way the user | |
1244 | * can choose to block these responses where appropriate, but won't get | |
1245 | * mysterious breakages. | |
1246 | */ | |
0655fa4d | 1247 | bool |
1248 | clientReplyContext::alwaysAllowResponse(http_status sline) const | |
edce4d98 | 1249 | { |
1250 | switch (sline) { | |
62e76326 | 1251 | |
edce4d98 | 1252 | case HTTP_CONTINUE: |
62e76326 | 1253 | |
edce4d98 | 1254 | case HTTP_SWITCHING_PROTOCOLS: |
62e76326 | 1255 | |
edce4d98 | 1256 | case HTTP_PROCESSING: |
62e76326 | 1257 | |
edce4d98 | 1258 | case HTTP_NO_CONTENT: |
62e76326 | 1259 | |
edce4d98 | 1260 | case HTTP_NOT_MODIFIED: |
0655fa4d | 1261 | return true; |
62e76326 | 1262 | /* unreached */ |
1263 | break; | |
1264 | ||
edce4d98 | 1265 | default: |
0655fa4d | 1266 | return false; |
edce4d98 | 1267 | } |
1268 | } | |
1269 | ||
528b2c61 | 1270 | void |
0655fa4d | 1271 | clientReplyContext::obeyConnectionHeader() |
528b2c61 | 1272 | { |
0655fa4d | 1273 | HttpHeader *hdr = &holdingReply->header; |
924f73bc | 1274 | hdr->removeConnectionHeaderEntries(); |
528b2c61 | 1275 | } |
1276 | ||
edce4d98 | 1277 | /* |
1278 | * filters out unwanted entries from original reply header | |
1279 | * adds extra entries if we have more info than origin server | |
1280 | * adds Squid specific entries | |
1281 | */ | |
0655fa4d | 1282 | void |
1283 | clientReplyContext::buildReplyHeader() | |
edce4d98 | 1284 | { |
0655fa4d | 1285 | HttpHeader *hdr = &holdingReply->header; |
c8be6d7b | 1286 | int is_hit = logTypeIsATcpHit(http->logType); |
edce4d98 | 1287 | request_t *request = http->request; |
1288 | #if DONT_FILTER_THESE | |
1289 | /* but you might want to if you run Squid as an HTTP accelerator */ | |
1290 | /* httpHeaderDelById(hdr, HDR_ACCEPT_RANGES); */ | |
1291 | httpHeaderDelById(hdr, HDR_ETAG); | |
1292 | #endif | |
62e76326 | 1293 | |
edce4d98 | 1294 | httpHeaderDelById(hdr, HDR_PROXY_CONNECTION); |
1295 | /* here: Keep-Alive is a field-name, not a connection directive! */ | |
1296 | httpHeaderDelByName(hdr, "Keep-Alive"); | |
1297 | /* remove Set-Cookie if a hit */ | |
62e76326 | 1298 | |
edce4d98 | 1299 | if (is_hit) |
62e76326 | 1300 | httpHeaderDelById(hdr, HDR_SET_COOKIE); |
1301 | ||
0655fa4d | 1302 | obeyConnectionHeader(); |
62e76326 | 1303 | |
1304 | // if (request->range) | |
0655fa4d | 1305 | // clientBuildRangeHeader(http, holdingReply); |
edce4d98 | 1306 | /* |
1307 | * Add a estimated Age header on cache hits. | |
1308 | */ | |
1309 | if (is_hit) { | |
62e76326 | 1310 | /* |
1311 | * Remove any existing Age header sent by upstream caches | |
1312 | * (note that the existing header is passed along unmodified | |
1313 | * on cache misses) | |
1314 | */ | |
1315 | httpHeaderDelById(hdr, HDR_AGE); | |
1316 | /* | |
1317 | * This adds the calculated object age. Note that the details of the | |
1318 | * age calculation is performed by adjusting the timestamp in | |
1319 | * storeTimestampsSet(), not here. | |
1320 | * | |
1321 | * BROWSER WORKAROUND: IE sometimes hangs when receiving a 0 Age | |
1322 | * header, so don't use it unless there is a age to report. Please | |
1323 | * note that Age is only used to make a conservative estimation of | |
1324 | * the objects age, so a Age: 0 header does not add any useful | |
1325 | * information to the reply in any case. | |
1326 | */ | |
1327 | ||
86a2f789 | 1328 | if (NULL == http->storeEntry()) |
62e76326 | 1329 | (void) 0; |
86a2f789 | 1330 | else if (http->storeEntry()->timestamp < 0) |
62e76326 | 1331 | (void) 0; |
86a2f789 | 1332 | else if (http->storeEntry()->timestamp < squid_curtime) { |
62e76326 | 1333 | httpHeaderPutInt(hdr, HDR_AGE, |
86a2f789 | 1334 | squid_curtime - http->storeEntry()->timestamp); |
62e76326 | 1335 | /* Signal old objects. NB: rfc 2616 is not clear, |
1336 | * by implication, on whether we should do this to all | |
1337 | * responses, or only cache hits. | |
1338 | * 14.46 states it ONLY applys for heuristically caclulated | |
1339 | * freshness values, 13.2.4 doesn't specify the same limitation. | |
1340 | * We interpret RFC 2616 under the combination. | |
1341 | */ | |
1342 | /* TODO: if maxage or s-maxage is present, don't do this */ | |
1343 | ||
86a2f789 | 1344 | if (squid_curtime - http->storeEntry()->timestamp >= 86400) { |
62e76326 | 1345 | char tempbuf[512]; |
1346 | snprintf (tempbuf, sizeof(tempbuf), "%s %s %s", | |
1347 | "113", ThisCache, | |
1348 | "This cache hit is still fresh and more than 1 day old"); | |
1349 | httpHeaderPutStr(hdr, HDR_WARNING, tempbuf); | |
1350 | } | |
1351 | } | |
528b2c61 | 1352 | |
edce4d98 | 1353 | } |
62e76326 | 1354 | |
0bd9aa82 | 1355 | /* Filter unproxyable authentication types */ |
ddd31ed3 | 1356 | if (http->logType != LOG_TCP_DENIED && |
62e76326 | 1357 | (httpHeaderHas(hdr, HDR_WWW_AUTHENTICATE) || httpHeaderHas(hdr, HDR_PROXY_AUTHENTICATE))) { |
1358 | HttpHeaderPos pos = HttpHeaderInitPos; | |
1359 | HttpHeaderEntry *e; | |
1360 | ||
1361 | while ((e = httpHeaderGetEntry(hdr, &pos))) { | |
1362 | if (e->id == HDR_WWW_AUTHENTICATE || e->id == HDR_PROXY_AUTHENTICATE) { | |
1363 | const char *value = e->value.buf(); | |
1364 | ||
1365 | if ((strncasecmp(value, "NTLM", 4) == 0 && | |
1366 | (value[4] == '\0' || value[4] == ' ')) | |
1367 | || | |
1368 | (strncasecmp(value, "Negotiate", 9) == 0 && | |
1369 | (value[9] == '\0' || value[9] == ' '))) | |
1370 | httpHeaderDelAt(hdr, pos); | |
1371 | } | |
1372 | } | |
0bd9aa82 | 1373 | } |
62e76326 | 1374 | |
edce4d98 | 1375 | /* Handle authentication headers */ |
1376 | if (request->auth_user_request) | |
0655fa4d | 1377 | authenticateFixHeader(holdingReply, request->auth_user_request, request, |
62e76326 | 1378 | http->flags.accel, 0); |
1379 | ||
edce4d98 | 1380 | /* Append X-Cache */ |
1381 | httpHeaderPutStrf(hdr, HDR_X_CACHE, "%s from %s", | |
62e76326 | 1382 | is_hit ? "HIT" : "MISS", getMyHostname()); |
1383 | ||
edce4d98 | 1384 | #if USE_CACHE_DIGESTS |
1385 | /* Append X-Cache-Lookup: -- temporary hack, to be removed @?@ @?@ */ | |
1386 | httpHeaderPutStrf(hdr, HDR_X_CACHE_LOOKUP, "%s from %s:%d", | |
0655fa4d | 1387 | lookup_type ? lookup_type : "NONE", |
62e76326 | 1388 | getMyHostname(), getMyPort()); |
1389 | ||
edce4d98 | 1390 | #endif |
62e76326 | 1391 | |
0655fa4d | 1392 | if (httpReplyBodySize(request->method, holdingReply) < 0) { |
62e76326 | 1393 | debug(88, |
1394 | 3) | |
1395 | ("clientBuildReplyHeader: can't keep-alive, unknown body size\n"); | |
1396 | request->flags.proxy_keepalive = 0; | |
edce4d98 | 1397 | } |
62e76326 | 1398 | |
4dea3fdd | 1399 | /* Append VIA */ |
c8be6d7b | 1400 | { |
62e76326 | 1401 | LOCAL_ARRAY(char, bbuf, MAX_URL + 32); |
1402 | String strVia = httpHeaderGetList(hdr, HDR_VIA); | |
1403 | snprintf(bbuf, sizeof(bbuf), "%d.%d %s", | |
0655fa4d | 1404 | holdingReply->sline.version.major, |
1405 | holdingReply->sline.version.minor, | |
62e76326 | 1406 | ThisCache); |
1407 | strListAdd(&strVia, bbuf, ','); | |
1408 | httpHeaderDelById(hdr, HDR_VIA); | |
1409 | httpHeaderPutStr(hdr, HDR_VIA, strVia.buf()); | |
1410 | strVia.clean(); | |
c8be6d7b | 1411 | } |
edce4d98 | 1412 | /* Signal keep-alive if needed */ |
1413 | httpHeaderPutStr(hdr, | |
62e76326 | 1414 | http->flags.accel ? HDR_CONNECTION : HDR_PROXY_CONNECTION, |
1415 | request->flags.proxy_keepalive ? "keep-alive" : "close"); | |
1416 | ||
edce4d98 | 1417 | #if ADD_X_REQUEST_URI |
1418 | /* | |
1419 | * Knowing the URI of the request is useful when debugging persistent | |
1420 | * connections in a client; we cannot guarantee the order of http headers, | |
1421 | * but X-Request-URI is likely to be the very last header to ease use from a | |
1422 | * debugger [hdr->entries.count-1]. | |
1423 | */ | |
1424 | httpHeaderPutStr(hdr, HDR_X_REQUEST_URI, | |
86a2f789 | 1425 | http->memOjbect()->url ? http->memObject()->url : http->uri); |
62e76326 | 1426 | |
edce4d98 | 1427 | #endif |
62e76326 | 1428 | |
edce4d98 | 1429 | httpHdrMangleList(hdr, request); |
1430 | } | |
1431 | ||
1432 | ||
0655fa4d | 1433 | void |
1434 | clientReplyContext::buildReply(const char *buf, size_t size) | |
edce4d98 | 1435 | { |
edce4d98 | 1436 | size_t k = headersEnd(buf, size); |
62e76326 | 1437 | |
0655fa4d | 1438 | if (!k) |
1439 | return; | |
1440 | ||
1441 | holdReply(httpReplyCreate()); | |
1442 | ||
1443 | if (!httpReplyParse(holdingReply, buf, k)) { | |
62e76326 | 1444 | /* parsing failure, get rid of the invalid reply */ |
0655fa4d | 1445 | httpReplyDestroy(holdingReply); |
1446 | holdReply (NULL); | |
62e76326 | 1447 | /* This is wrong. httpReplyDestroy should to the rep |
1448 | * for us, and we can destroy our own range info | |
1449 | */ | |
1450 | ||
0655fa4d | 1451 | if (http->request->range) { |
62e76326 | 1452 | /* this will fail and destroy request->range */ |
0655fa4d | 1453 | // clientBuildRangeHeader(http, holdingReply); |
62e76326 | 1454 | } |
b51aec66 | 1455 | |
edce4d98 | 1456 | } |
62e76326 | 1457 | |
0655fa4d | 1458 | /* enforce 1.0 reply version */ |
1459 | httpBuildVersion(&holdingReply->sline.version, 1, 0); | |
1460 | ||
1461 | /* do header conversions */ | |
1462 | buildReplyHeader(); | |
edce4d98 | 1463 | } |
1464 | ||
e6ccf245 | 1465 | void |
1466 | clientReplyContext::identifyStoreObject() | |
edce4d98 | 1467 | { |
1468 | request_t *r = http->request; | |
62e76326 | 1469 | |
e6ccf245 | 1470 | if (r->flags.cachable || r->flags.internal) { |
62e76326 | 1471 | lookingforstore = 5; |
1472 | StoreEntry::getPublicByRequest (this, r); | |
e6ccf245 | 1473 | } else |
62e76326 | 1474 | identifyFoundObject (NullStoreEntry::getInstance()); |
e6ccf245 | 1475 | } |
1476 | ||
1477 | void | |
1478 | clientReplyContext::identifyFoundObject(StoreEntry *newEntry) | |
1479 | { | |
1480 | StoreEntry *e = newEntry; | |
1481 | request_t *r = http->request; | |
62e76326 | 1482 | |
e6ccf245 | 1483 | if (e->isNull()) { |
86a2f789 | 1484 | http->storeEntry(NULL); |
e6ccf245 | 1485 | } else { |
86a2f789 | 1486 | http->storeEntry(e); |
e6ccf245 | 1487 | } |
62e76326 | 1488 | |
86a2f789 | 1489 | e = http->storeEntry(); |
edce4d98 | 1490 | /* Release negatively cached IP-cache entries on reload */ |
62e76326 | 1491 | |
edce4d98 | 1492 | if (r->flags.nocache) |
62e76326 | 1493 | ipcacheInvalidate(r->host); |
1494 | ||
edce4d98 | 1495 | #if HTTP_VIOLATIONS |
62e76326 | 1496 | |
edce4d98 | 1497 | else if (r->flags.nocache_hack) |
62e76326 | 1498 | ipcacheInvalidate(r->host); |
1499 | ||
edce4d98 | 1500 | #endif |
1501 | #if USE_CACHE_DIGESTS | |
62e76326 | 1502 | |
86a2f789 | 1503 | lookup_type = http->storeEntry() ? "HIT" : "MISS"; |
62e76326 | 1504 | |
edce4d98 | 1505 | #endif |
62e76326 | 1506 | |
86a2f789 | 1507 | if (NULL == http->storeEntry()) { |
62e76326 | 1508 | /* this object isn't in the cache */ |
1509 | debug(85, 3) ("clientProcessRequest2: storeGet() MISS\n"); | |
1510 | http->logType = LOG_TCP_MISS; | |
1511 | doGetMoreData(); | |
1512 | return; | |
edce4d98 | 1513 | } |
62e76326 | 1514 | |
edce4d98 | 1515 | if (Config.onoff.offline) { |
62e76326 | 1516 | debug(85, 3) ("clientProcessRequest2: offline HIT\n"); |
1517 | http->logType = LOG_TCP_HIT; | |
1518 | doGetMoreData(); | |
1519 | return; | |
edce4d98 | 1520 | } |
62e76326 | 1521 | |
edce4d98 | 1522 | if (http->redirect.status) { |
62e76326 | 1523 | /* force this to be a miss */ |
86a2f789 | 1524 | http->storeEntry(NULL); |
62e76326 | 1525 | http->logType = LOG_TCP_MISS; |
1526 | doGetMoreData(); | |
1527 | return; | |
edce4d98 | 1528 | } |
62e76326 | 1529 | |
edce4d98 | 1530 | if (!storeEntryValidToSend(e)) { |
62e76326 | 1531 | debug(85, 3) ("clientProcessRequest2: !storeEntryValidToSend MISS\n"); |
86a2f789 | 1532 | http->storeEntry(NULL); |
62e76326 | 1533 | http->logType = LOG_TCP_MISS; |
1534 | doGetMoreData(); | |
1535 | return; | |
edce4d98 | 1536 | } |
62e76326 | 1537 | |
edce4d98 | 1538 | if (EBIT_TEST(e->flags, ENTRY_SPECIAL)) { |
62e76326 | 1539 | /* Special entries are always hits, no matter what the client says */ |
1540 | debug(85, 3) ("clientProcessRequest2: ENTRY_SPECIAL HIT\n"); | |
1541 | http->logType = LOG_TCP_HIT; | |
1542 | doGetMoreData(); | |
1543 | return; | |
edce4d98 | 1544 | } |
62e76326 | 1545 | |
edce4d98 | 1546 | #if HTTP_VIOLATIONS |
86a2f789 | 1547 | if (http->storeEntry()->store_status == STORE_PENDING) { |
62e76326 | 1548 | if (r->flags.nocache || r->flags.nocache_hack) { |
1549 | debug(85, 3) ("Clearing no-cache for STORE_PENDING request\n\t%s\n", | |
86a2f789 | 1550 | storeUrl(http->storeEntry())); |
62e76326 | 1551 | r->flags.nocache = 0; |
1552 | r->flags.nocache_hack = 0; | |
1553 | } | |
edce4d98 | 1554 | } |
62e76326 | 1555 | |
edce4d98 | 1556 | #endif |
1557 | if (r->flags.nocache) { | |
62e76326 | 1558 | debug(85, 3) ("clientProcessRequest2: no-cache REFRESH MISS\n"); |
86a2f789 | 1559 | http->storeEntry(NULL); |
62e76326 | 1560 | http->logType = LOG_TCP_CLIENT_REFRESH_MISS; |
1561 | doGetMoreData(); | |
1562 | return; | |
edce4d98 | 1563 | } |
62e76326 | 1564 | |
edce4d98 | 1565 | /* We don't cache any range requests (for now!) -- adrian */ |
528b2c61 | 1566 | /* RBC - and we won't until the store supports sparse objects. |
1567 | * I suspec this test is incorrect though, as we can extract ranges from | |
1568 | * a fully cached object | |
1569 | */ | |
edce4d98 | 1570 | if (r->flags.range) { |
62e76326 | 1571 | /* XXX: test to see if we can satisfy the range with the cached object */ |
528b2c61 | 1572 | debug(85, 3) ("clientProcessRequest2: force MISS due to range presence\n"); |
86a2f789 | 1573 | http->storeEntry(NULL); |
62e76326 | 1574 | http->logType = LOG_TCP_MISS; |
1575 | doGetMoreData(); | |
1576 | return; | |
edce4d98 | 1577 | } |
62e76326 | 1578 | |
edce4d98 | 1579 | debug(85, 3) ("clientProcessRequest2: default HIT\n"); |
e6ccf245 | 1580 | http->logType = LOG_TCP_HIT; |
1581 | doGetMoreData(); | |
edce4d98 | 1582 | } |
1583 | ||
1584 | /* Request more data from the store for the client Stream | |
1585 | * This is *the* entry point to this module. | |
1586 | * | |
1587 | * Preconditions: | |
1588 | * This is the head of the list. | |
1589 | * There is at least one more node. | |
1590 | * data context is not null | |
1591 | */ | |
1592 | void | |
e6ccf245 | 1593 | clientGetMoreData(clientStreamNode * aNode, clientHttpRequest * http) |
edce4d98 | 1594 | { |
edce4d98 | 1595 | /* Test preconditions */ |
e6ccf245 | 1596 | assert(aNode != NULL); |
1597 | assert(cbdataReferenceValid(aNode)); | |
e6ccf245 | 1598 | assert(aNode->node.prev == NULL); |
1599 | assert(aNode->node.next != NULL); | |
0655fa4d | 1600 | clientReplyContext *context = dynamic_cast<clientReplyContext *>(aNode->data.getRaw()); |
1601 | assert (context); | |
edce4d98 | 1602 | assert(context->http == http); |
1603 | ||
0655fa4d | 1604 | clientStreamNode *next = ( clientStreamNode *)aNode->node.next->data; |
62e76326 | 1605 | |
edce4d98 | 1606 | if (!context->ourNode) |
62e76326 | 1607 | context->ourNode = aNode; |
1608 | ||
e6ccf245 | 1609 | /* no cbdatareference, this is only used once, and safely */ |
edce4d98 | 1610 | if (context->flags.storelogiccomplete) { |
62e76326 | 1611 | StoreIOBuffer tempBuffer; |
1612 | tempBuffer.offset = next->readBuffer.offset + context->headers_sz; | |
1613 | tempBuffer.length = next->readBuffer.length; | |
1614 | tempBuffer.data = next->readBuffer.data; | |
1615 | ||
86a2f789 | 1616 | storeClientCopy(context->sc, http->storeEntry(), |
0655fa4d | 1617 | tempBuffer, clientReplyContext::SendMoreData, context); |
62e76326 | 1618 | return; |
edce4d98 | 1619 | } |
62e76326 | 1620 | |
edce4d98 | 1621 | if (context->http->request->method == METHOD_PURGE) { |
62e76326 | 1622 | context->purgeRequest(); |
1623 | return; | |
edce4d98 | 1624 | } |
62e76326 | 1625 | |
edce4d98 | 1626 | if (context->http->request->method == METHOD_TRACE) { |
62e76326 | 1627 | if (context->http->request->max_forwards == 0) { |
0655fa4d | 1628 | context->traceReply(aNode); |
62e76326 | 1629 | return; |
1630 | } | |
1631 | ||
1632 | /* continue forwarding, not finished yet. */ | |
1633 | http->logType = LOG_TCP_MISS; | |
1634 | ||
1635 | context->doGetMoreData(); | |
edce4d98 | 1636 | } else |
62e76326 | 1637 | context->identifyStoreObject(); |
e6ccf245 | 1638 | } |
1639 | ||
1640 | void | |
1641 | clientReplyContext::doGetMoreData() | |
1642 | { | |
edce4d98 | 1643 | /* We still have to do store logic processing - vary, cache hit etc */ |
62e76326 | 1644 | |
86a2f789 | 1645 | if (http->storeEntry() != NULL) { |
62e76326 | 1646 | /* someone found the object in the cache for us */ |
1647 | StoreIOBuffer tempBuffer; | |
86a2f789 | 1648 | storeLockObject(http->storeEntry()); |
62e76326 | 1649 | |
86a2f789 | 1650 | if (http->storeEntry()->mem_obj == NULL) { |
62e76326 | 1651 | /* |
1652 | * This if-block exists because we don't want to clobber | |
1653 | * a preexiting mem_obj->method value if the mem_obj | |
1654 | * already exists. For example, when a HEAD request | |
1655 | * is a cache hit for a GET response, we want to keep | |
1656 | * the method as GET. | |
1657 | */ | |
86a2f789 | 1658 | storeCreateMemObject(http->storeEntry(), http->uri, |
62e76326 | 1659 | http->log_uri); |
86a2f789 | 1660 | http->storeEntry()->mem_obj->method = |
62e76326 | 1661 | http->request->method; |
1662 | } | |
1663 | ||
86a2f789 | 1664 | sc = storeClientListAdd(http->storeEntry(), this); |
edce4d98 | 1665 | #if DELAY_POOLS |
62e76326 | 1666 | |
1667 | sc->setDelayId(DelayId::DelayClient(http)); | |
edce4d98 | 1668 | #endif |
62e76326 | 1669 | |
1670 | assert(http->logType == LOG_TCP_HIT); | |
1671 | reqofs = 0; | |
1672 | /* guarantee nothing has been sent yet! */ | |
1673 | assert(http->out.size == 0); | |
1674 | assert(http->out.offset == 0); | |
1675 | tempBuffer.offset = reqofs; | |
1676 | tempBuffer.length = getNextNode()->readBuffer.length; | |
1677 | tempBuffer.data = getNextNode()->readBuffer.data; | |
86a2f789 | 1678 | storeClientCopy(sc, http->storeEntry(), |
0655fa4d | 1679 | tempBuffer, CacheHit, this); |
edce4d98 | 1680 | } else { |
62e76326 | 1681 | /* MISS CASE, http->logType is already set! */ |
0655fa4d | 1682 | processMiss(); |
edce4d98 | 1683 | } |
1684 | } | |
1685 | ||
1686 | /* the next node has removed itself from the stream. */ | |
1687 | void | |
1688 | clientReplyDetach(clientStreamNode * node, clientHttpRequest * http) | |
1689 | { | |
1690 | /* detach from the stream */ | |
edce4d98 | 1691 | clientStreamDetach(node, http); |
1692 | } | |
1693 | ||
1694 | /* | |
1695 | * accepts chunk of a http message in buf, parses prefix, filters headers and | |
1696 | * such, writes processed message to the message recipient | |
1697 | */ | |
1698 | void | |
0655fa4d | 1699 | clientReplyContext::SendMoreData(void *data, StoreIOBuffer result) |
edce4d98 | 1700 | { |
e6ccf245 | 1701 | clientReplyContext *context = static_cast<clientReplyContext *>(data); |
528b2c61 | 1702 | context->sendMoreData (result); |
1703 | } | |
1704 | ||
1705 | void | |
1706 | clientReplyContext::makeThisHead() | |
1707 | { | |
1708 | /* At least, I think thats what this does */ | |
1709 | dlinkDelete(&http->active, &ClientActiveRequests); | |
1710 | dlinkAdd(http, &http->active, &ClientActiveRequests); | |
1711 | } | |
1712 | ||
1713 | bool | |
1714 | clientReplyContext::errorInStream(StoreIOBuffer const &result, size_t const &sizeToProcess)const | |
1715 | { | |
1716 | return /* aborted request */ | |
86a2f789 | 1717 | (http->storeEntry() && EBIT_TEST(http->storeEntry()->flags, ENTRY_ABORTED)) || |
62e76326 | 1718 | /* Upstream read error */ (result.flags.error) || |
1719 | /* Upstream EOF */ (sizeToProcess == 0); | |
528b2c61 | 1720 | } |
1721 | ||
1722 | void | |
1723 | clientReplyContext::sendStreamError(StoreIOBuffer const &result) | |
1724 | { | |
1725 | /* call clientWriteComplete so the client socket gets closed */ | |
1726 | /* We call into the stream, because we don't know that there is a | |
1727 | * client socket! | |
1728 | */ | |
1729 | debug(88,5)("clientReplyContext::sendStreamError: A stream error has occured, marking as complete and sending no data.\n"); | |
1730 | StoreIOBuffer tempBuffer; | |
1731 | flags.complete = 1; | |
1732 | tempBuffer.flags.error = result.flags.error; | |
1733 | clientStreamCallback((clientStreamNode*)http->client_stream.head->data, http, NULL, | |
62e76326 | 1734 | tempBuffer); |
528b2c61 | 1735 | } |
1736 | ||
1737 | void | |
1738 | clientReplyContext::pushStreamData(StoreIOBuffer const &result, char *source) | |
1739 | { | |
1740 | StoreIOBuffer tempBuffer; | |
62e76326 | 1741 | |
528b2c61 | 1742 | if (result.length == 0) { |
62e76326 | 1743 | debug (88,5)("clientReplyContext::pushStreamData: marking request as complete due to 0 length store result\n"); |
1744 | flags.complete = 1; | |
528b2c61 | 1745 | } |
62e76326 | 1746 | |
43ae1d95 | 1747 | assert(result.offset - headers_sz == next()->readBuffer.offset); |
528b2c61 | 1748 | tempBuffer.offset = result.offset - headers_sz; |
1749 | tempBuffer.length = result.length; | |
62e76326 | 1750 | |
43ae1d95 | 1751 | if (tempBuffer.length) |
1752 | tempBuffer.data = source; | |
62e76326 | 1753 | |
528b2c61 | 1754 | clientStreamCallback((clientStreamNode*)http->client_stream.head->data, http, NULL, |
62e76326 | 1755 | tempBuffer); |
528b2c61 | 1756 | } |
1757 | ||
1758 | clientStreamNode * | |
1759 | clientReplyContext::next() const | |
1760 | { | |
1761 | assert ( (clientStreamNode*)http->client_stream.head->next->data == getNextNode()); | |
1762 | return getNextNode(); | |
1763 | } | |
1764 | ||
1765 | void | |
0655fa4d | 1766 | clientReplyContext::waitForMoreData () |
528b2c61 | 1767 | { |
1768 | debug(88,5)("clientReplyContext::waitForMoreData: Waiting for more data to parse reply headers in client side.\n"); | |
1769 | /* We don't have enough to parse the metadata yet */ | |
1770 | /* TODO: the store should give us out of band metadata and | |
1771 | * obsolete this routine | |
1772 | */ | |
1773 | /* wait for more to arrive */ | |
528b2c61 | 1774 | startSendProcess(); |
1775 | } | |
1776 | ||
1777 | void | |
1778 | clientReplyContext::startSendProcess() | |
1779 | { | |
0655fa4d | 1780 | debug(88,5)("clientReplyContext::startSendProcess: triggering store read to SendMoreData\n"); |
528b2c61 | 1781 | assert(reqofs <= HTTP_REQBUF_SZ); |
1782 | /* TODO: copy into the supplied buffer */ | |
1783 | StoreIOBuffer tempBuffer; | |
1784 | tempBuffer.offset = reqofs; | |
1785 | tempBuffer.length = next()->readBuffer.length - reqofs; | |
1786 | tempBuffer.data = next()->readBuffer.data + reqofs; | |
86a2f789 | 1787 | storeClientCopy(sc, http->storeEntry(), |
0655fa4d | 1788 | tempBuffer, SendMoreData, this); |
1789 | } | |
1790 | ||
1791 | void | |
1792 | clientReplyContext::holdReply(HttpReply *aReply) | |
1793 | { | |
1794 | assert (!holdingReply || !aReply); | |
1795 | holdingReply = aReply; | |
528b2c61 | 1796 | } |
1797 | ||
b51aec66 | 1798 | /* |
1799 | * Calculates the maximum size allowed for an HTTP response | |
1800 | */ | |
1801 | void | |
1802 | clientReplyContext::buildMaxBodySize(HttpReply * reply) | |
1803 | { | |
ef1955a5 | 1804 | acl_size_t *l = Config.ReplyBodySize; |
1805 | ACLChecklist *ch; | |
b51aec66 | 1806 | |
ef1955a5 | 1807 | ch = clientAclChecklistCreate(NULL, http); |
1808 | ch->reply = reply; | |
1809 | ||
1810 | for (l = Config.ReplyBodySize; l; l = l -> next) { | |
7684c4b1 | 1811 | if (ch->matchAclListFast(l->aclList)) { |
43cb430e | 1812 | if (l->size != static_cast<size_t>(-1)) { |
1813 | debug(58, 3) ("clientReplyContext: Setting maxBodySize to %ld\n", (long int) l->size); | |
ef1955a5 | 1814 | http->maxReplyBodySize(l->size); |
43cb430e | 1815 | } |
b51aec66 | 1816 | |
ef1955a5 | 1817 | break; |
1818 | } | |
b51aec66 | 1819 | } |
ef1955a5 | 1820 | |
1821 | delete ch; | |
b51aec66 | 1822 | } |
1823 | ||
4993f571 | 1824 | void |
1825 | clientReplyContext::processReplyAccess () | |
1826 | { | |
1827 | HttpReply *rep = holdingReply; | |
0655fa4d | 1828 | holdReply(NULL); |
b51aec66 | 1829 | buildMaxBodySize(rep); |
62e76326 | 1830 | |
b51aec66 | 1831 | if (http->isReplyBodyTooLarge(rep->content_length)) { |
62e76326 | 1832 | ErrorState *err = |
1833 | clientBuildError(ERR_TOO_BIG, HTTP_FORBIDDEN, NULL, | |
a2ac85d9 | 1834 | http->getConn().getRaw() != NULL ? &http->getConn()->peer.sin_addr : &no_addr, |
62e76326 | 1835 | http->request); |
86a2f789 | 1836 | removeClientStoreReference(&sc, http); |
0655fa4d | 1837 | startError(err); |
62e76326 | 1838 | httpReplyDestroy(rep); |
1839 | return; | |
1840 | } | |
1841 | ||
1842 | headers_sz = rep->hdr_sz; | |
1843 | ACLChecklist *replyChecklist; | |
1844 | replyChecklist = clientAclChecklistCreate(Config.accessList.reply, http); | |
1845 | replyChecklist->reply = rep; | |
0655fa4d | 1846 | holdReply (rep); |
1847 | replyChecklist->nonBlockingCheck(ProcessReplyAccessResult, this); | |
4993f571 | 1848 | } |
1849 | ||
1850 | void | |
0655fa4d | 1851 | clientReplyContext::ProcessReplyAccessResult (int rv, void *voidMe) |
4993f571 | 1852 | { |
1853 | clientReplyContext *me = static_cast<clientReplyContext *>(voidMe); | |
0655fa4d | 1854 | me->processReplyAccessResult(rv); |
4993f571 | 1855 | } |
1856 | ||
1857 | void | |
0655fa4d | 1858 | clientReplyContext::processReplyAccessResult(bool accessAllowed) |
4993f571 | 1859 | { |
62e76326 | 1860 | debug(88, 2) ("The reply for %s %s is %s, because it matched '%s'\n", |
1861 | RequestMethodStr[http->request->method], http->uri, | |
1862 | accessAllowed ? "ALLOWED" : "DENIED", | |
1863 | AclMatchedName ? AclMatchedName : "NO ACL's"); | |
1864 | HttpReply *rep = holdingReply; | |
0655fa4d | 1865 | holdReply (NULL); |
62e76326 | 1866 | |
1867 | if (!accessAllowed && rep->sline.status != HTTP_FORBIDDEN | |
0655fa4d | 1868 | && !alwaysAllowResponse(rep->sline.status)) { |
62e76326 | 1869 | /* the if above is slightly broken, but there is no way |
1870 | * to tell if this is a squid generated error page, or one from | |
1871 | * upstream at this point. */ | |
1872 | ErrorState *err; | |
1873 | err = | |
1874 | clientBuildError(ERR_ACCESS_DENIED, HTTP_FORBIDDEN, NULL, | |
a2ac85d9 | 1875 | http->getConn().getRaw() != NULL ? &http->getConn()->peer.sin_addr : &no_addr, |
62e76326 | 1876 | http->request); |
86a2f789 | 1877 | removeClientStoreReference(&sc, http); |
0655fa4d | 1878 | startError(err); |
62e76326 | 1879 | httpReplyDestroy(rep); |
c2cf9bea | 1880 | http->logType = LOG_TCP_DENIED_REPLY; |
62e76326 | 1881 | return; |
1882 | } | |
1883 | ||
1884 | ssize_t body_size = reqofs - rep->hdr_sz; | |
1885 | assert(body_size >= 0); | |
1886 | debug(88,3) | |
0655fa4d | 1887 | ("clientReplyContext::sendMoreData: Appending %d bytes after %d bytes of headers\n", |
62e76326 | 1888 | (int) body_size, rep->hdr_sz); |
43ae1d95 | 1889 | #if ESI |
62e76326 | 1890 | |
43ae1d95 | 1891 | if (http->flags.accel && rep->sline.status != HTTP_FORBIDDEN && |
0655fa4d | 1892 | !alwaysAllowResponse(rep->sline.status) && |
43ae1d95 | 1893 | esiEnableProcessing(rep)) { |
1894 | debug(88, 2) ("Enabling ESI processing for %s\n", http->uri); | |
1895 | clientStreamInsertHead(&http->client_stream, esiStreamRead, | |
1896 | esiProcessStream, esiStreamDetach, esiStreamStatus, NULL); | |
1897 | } | |
1898 | ||
1899 | #endif | |
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 | ||
1910 | StoreIOBuffer tempBuffer; | |
1911 | char *buf = next()->readBuffer.data; | |
1912 | char *body_buf = buf + rep->hdr_sz; | |
1913 | ||
49ea0125 | 1914 | //Server side may disable ranges under some circumstances. |
1915 | ||
1916 | if ((!http->request->range)) | |
1917 | next()->readBuffer.offset = 0; | |
1918 | ||
62e76326 | 1919 | if (next()->readBuffer.offset != 0) { |
1920 | if (next()->readBuffer.offset > body_size) { | |
1921 | /* Can't use any of the body we recieved. send nothing */ | |
1922 | tempBuffer.length = 0; | |
1923 | tempBuffer.data = NULL; | |
1924 | } else { | |
1925 | tempBuffer.length = body_size - next()->readBuffer.offset; | |
1926 | tempBuffer.data = body_buf + next()->readBuffer.offset; | |
1927 | } | |
1928 | } else { | |
1929 | tempBuffer.length = body_size; | |
1930 | tempBuffer.data = body_buf; | |
1931 | } | |
1932 | ||
0655fa4d | 1933 | /* TODO??: move the data in the buffer back by the request header size */ |
62e76326 | 1934 | clientStreamCallback((clientStreamNode *)http->client_stream.head->data, |
1935 | http, rep, tempBuffer); | |
1936 | ||
1937 | return; | |
4993f571 | 1938 | } |
1939 | ||
528b2c61 | 1940 | void |
1941 | clientReplyContext::sendMoreData (StoreIOBuffer result) | |
1942 | { | |
50c09fc4 | 1943 | if (deleting) |
1944 | return; | |
1945 | ||
86a2f789 | 1946 | StoreEntry *entry = http->storeEntry(); |
50c09fc4 | 1947 | |
a2ac85d9 | 1948 | ConnStateData::Pointer conn = http->getConn(); |
50c09fc4 | 1949 | |
a2ac85d9 | 1950 | int fd = conn.getRaw() != NULL ? conn->fd : -1; |
50c09fc4 | 1951 | |
528b2c61 | 1952 | char *buf = next()->readBuffer.data; |
50c09fc4 | 1953 | |
c8be6d7b | 1954 | char *body_buf = buf; |
edce4d98 | 1955 | |
62e76326 | 1956 | /* This is always valid until we get the headers as metadata from |
528b2c61 | 1957 | * storeClientCopy. |
1958 | * Then it becomes reqofs == next->readBuffer.offset() | |
af29fa86 | 1959 | */ |
528b2c61 | 1960 | assert(reqofs == 0 || flags.storelogiccomplete); |
af29fa86 | 1961 | |
528b2c61 | 1962 | if (flags.headersSent && buf != result.data) { |
62e76326 | 1963 | /* we've got to copy some data */ |
1964 | assert(result.length <= next()->readBuffer.length); | |
1965 | xmemcpy(buf, result.data, result.length); | |
1966 | body_buf = buf; | |
528b2c61 | 1967 | } else if (!flags.headersSent && |
62e76326 | 1968 | buf + reqofs !=result.data) { |
1969 | /* we've got to copy some data */ | |
1970 | assert(result.length + reqofs <= next()->readBuffer.length); | |
1971 | xmemcpy(buf + reqofs, result.data, result.length); | |
1972 | body_buf = buf; | |
edce4d98 | 1973 | } |
62e76326 | 1974 | |
edce4d98 | 1975 | /* We've got the final data to start pushing... */ |
528b2c61 | 1976 | flags.storelogiccomplete = 1; |
edce4d98 | 1977 | |
4993f571 | 1978 | reqofs += result.length; |
1979 | ||
1980 | assert(reqofs <= HTTP_REQBUF_SZ || flags.headersSent); | |
62e76326 | 1981 | |
edce4d98 | 1982 | assert(http->request != NULL); |
62e76326 | 1983 | |
edce4d98 | 1984 | /* ESI TODO: remove this assert once everything is stable */ |
1985 | assert(http->client_stream.head->data | |
62e76326 | 1986 | && cbdataReferenceValid(http->client_stream.head->data)); |
528b2c61 | 1987 | |
1988 | makeThisHead(); | |
62e76326 | 1989 | |
0655fa4d | 1990 | debug(88, 5) ("clientReplyContext::sendMoreData: %s, %d bytes (%u new bytes)\n", |
62e76326 | 1991 | http->uri, (int) reqofs, (unsigned int)result.length); |
1992 | ||
0655fa4d | 1993 | debug(88, 5) ("clientReplyContext::sendMoreData: FD %d '%s', out.offset=%ld \n", |
62e76326 | 1994 | fd, storeUrl(entry), (long int) http->out.offset); |
528b2c61 | 1995 | |
edce4d98 | 1996 | /* update size of the request */ |
4993f571 | 1997 | reqsize = reqofs; |
62e76326 | 1998 | |
e429f975 | 1999 | if (http->request->flags.resetTCP()) { |
62e76326 | 2000 | /* yuck. FIXME: move to client_side.c */ |
2001 | ||
2002 | if (fd != -1) | |
2003 | comm_reset_close(fd); | |
2004 | ||
2005 | return; | |
528b2c61 | 2006 | } |
62e76326 | 2007 | |
4993f571 | 2008 | if (errorInStream(result, reqofs)) { |
62e76326 | 2009 | sendStreamError(result); |
2010 | return; | |
edce4d98 | 2011 | } |
528b2c61 | 2012 | |
2013 | if (flags.headersSent) { | |
62e76326 | 2014 | pushStreamData (result, buf); |
2015 | return; | |
edce4d98 | 2016 | } |
62e76326 | 2017 | |
edce4d98 | 2018 | /* handle headers */ |
2019 | if (Config.onoff.log_mime_hdrs) { | |
62e76326 | 2020 | size_t k; |
2021 | ||
2022 | if ((k = headersEnd(buf, reqofs))) { | |
2023 | safe_free(http->al.headers.reply); | |
2024 | http->al.headers.reply = (char *)xcalloc(k + 1, 1); | |
2025 | xstrncpy(http->al.headers.reply, buf, k); | |
2026 | } | |
edce4d98 | 2027 | } |
62e76326 | 2028 | |
0655fa4d | 2029 | buildReply(buf, reqofs); |
4993f571 | 2030 | ssize_t body_size = reqofs; |
62e76326 | 2031 | |
0655fa4d | 2032 | if (holdingReply) { |
62e76326 | 2033 | holdingBuffer = result; |
2034 | processReplyAccess (); | |
2035 | return; | |
43ae1d95 | 2036 | |
4993f571 | 2037 | } else if (reqofs < HTTP_REQBUF_SZ && entry->store_status == STORE_PENDING) { |
0655fa4d | 2038 | waitForMoreData(); |
62e76326 | 2039 | return; |
528b2c61 | 2040 | } else if (http->request->method == METHOD_HEAD) { |
62e76326 | 2041 | /* |
2042 | * If we are here, then store_status == STORE_OK and it | |
2043 | * seems we have a HEAD repsponse which is missing the | |
2044 | * empty end-of-headers line (home.mira.net, phttpd/0.99.72 | |
0655fa4d | 2045 | * does this). Because buildReply() fails we just |
62e76326 | 2046 | * call this reply a body, set the done_copying flag and |
2047 | * continue... | |
2048 | */ | |
2049 | /* RBC: Note that this is seriously broken, as we *need* the | |
2050 | * metadata to allow further client modules to work. As such | |
2051 | * webservers are seriously broken, this is probably not | |
2052 | * going to get fixed.. perhapos we should remove it? | |
2053 | */ | |
2054 | debug (88,0)("Broken head response - probably phttpd/0.99.72\n"); | |
2055 | http->flags.done_copying = 1; | |
2056 | flags.complete = 1; | |
2057 | /* | |
2058 | * And as this is a malformed HTTP reply we cannot keep | |
2059 | * the connection persistent | |
2060 | */ | |
2061 | http->request->flags.proxy_keepalive = 0; | |
2062 | ||
62e76326 | 2063 | assert(body_buf && body_size); |
0655fa4d | 2064 | StoreIOBuffer tempBuffer (body_size, 0 ,body_buf); |
62e76326 | 2065 | clientStreamCallback((clientStreamNode *)http->client_stream.head->data, |
2066 | http, NULL, tempBuffer); | |
528b2c61 | 2067 | } else { |
62e76326 | 2068 | debug (88,0)("clientReplyContext::sendMoreData: Unable to parse reply headers within a single HTTP_REQBUF_SZ length buffer\n"); |
2069 | StoreIOBuffer tempBuffer; | |
2070 | tempBuffer.flags.error = 1; | |
0655fa4d | 2071 | /* XXX FIXME: make an html error page here */ |
62e76326 | 2072 | sendStreamError(tempBuffer); |
2073 | return; | |
edce4d98 | 2074 | } |
62e76326 | 2075 | |
528b2c61 | 2076 | fatal ("clientReplyContext::sendMoreData: Unreachable code reached \n"); |
edce4d98 | 2077 | } |
2078 | ||
62e76326 | 2079 | |
edce4d98 | 2080 | |
2081 | /* Using this breaks the client layering just a little! | |
2082 | */ | |
0655fa4d | 2083 | void |
2084 | clientReplyContext::createStoreEntry(method_t m, request_flags flags) | |
edce4d98 | 2085 | { |
0655fa4d | 2086 | assert(http != NULL); |
edce4d98 | 2087 | /* |
2088 | * For erroneous requests, we might not have a h->request, | |
2089 | * so make a fake one. | |
2090 | */ | |
62e76326 | 2091 | |
0655fa4d | 2092 | if (http->request == NULL) |
2093 | http->request = requestLink(requestCreate(m, PROTO_NONE, null_string)); | |
62e76326 | 2094 | |
0655fa4d | 2095 | StoreEntry *e = storeCreateEntry(http->uri, http->log_uri, flags, m); |
62e76326 | 2096 | |
0655fa4d | 2097 | sc = storeClientListAdd(e, this); |
62e76326 | 2098 | |
edce4d98 | 2099 | #if DELAY_POOLS |
62e76326 | 2100 | |
0655fa4d | 2101 | sc->setDelayId(DelayId::DelayClient(http)); |
62e76326 | 2102 | |
edce4d98 | 2103 | #endif |
62e76326 | 2104 | |
0655fa4d | 2105 | reqofs = 0; |
62e76326 | 2106 | |
0655fa4d | 2107 | reqsize = 0; |
62e76326 | 2108 | |
edce4d98 | 2109 | /* I don't think this is actually needed! -- adrian */ |
0655fa4d | 2110 | /* http->reqbuf = http->norm_reqbuf; */ |
2111 | // assert(http->reqbuf == http->norm_reqbuf); | |
edce4d98 | 2112 | /* The next line is illegal because we don't know if the client stream |
2113 | * buffers have been set up | |
2114 | */ | |
0655fa4d | 2115 | // storeClientCopy(http->sc, e, 0, HTTP_REQBUF_SZ, http->reqbuf, |
2116 | // SendMoreData, this); | |
edce4d98 | 2117 | /* So, we mark the store logic as complete */ |
0655fa4d | 2118 | this->flags.storelogiccomplete = 1; |
62e76326 | 2119 | |
edce4d98 | 2120 | /* and get the caller to request a read, from whereever they are */ |
62e76326 | 2121 | /* NOTE: after ANY data flows down the pipe, even one step, |
edce4d98 | 2122 | * this function CAN NOT be used to manage errors |
2123 | */ | |
86a2f789 | 2124 | http->storeEntry(e); |
edce4d98 | 2125 | } |
2126 | ||
2127 | ErrorState * | |
2128 | clientBuildError(err_type page_id, http_status status, char const *url, | |
62e76326 | 2129 | |
2130 | struct in_addr * src_addr, request_t * request) | |
edce4d98 | 2131 | { |
2132 | ErrorState *err = errorCon(page_id, status); | |
2133 | err->src_addr = *src_addr; | |
62e76326 | 2134 | |
edce4d98 | 2135 | if (url) |
62e76326 | 2136 | err->url = xstrdup(url); |
2137 | ||
edce4d98 | 2138 | if (request) |
62e76326 | 2139 | err->request = requestLink(request); |
2140 | ||
edce4d98 | 2141 | return err; |
2142 | } |