2 * DEBUG: section 88 Client-side Reply Routines
3 * AUTHOR: Robert Collins (Originally Duane Wessels in client_side.c)
5 * SQUID Web Proxy Cache http://www.squid-cache.org/
6 * ----------------------------------------------------------
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19 * the Free Software Foundation; either version 2 of the License, or
20 * (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
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29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
33 #include "acl/FilledChecklist.h"
34 #include "acl/Gadgets.h"
35 #include "anyp/PortCfg.h"
36 #include "client_side_reply.h"
37 #include "errorpage.h"
41 #include "format/Token.h"
45 #include "HttpHeaderTools.h"
46 #include "HttpReply.h"
47 #include "HttpRequest.h"
48 #include "ip/QosConfig.h"
50 #include "log/access_log.h"
51 #include "MemObject.h"
52 #include "mime_header.h"
53 #include "neighbors.h"
55 #include "RequestFlags.h"
56 #include "SquidConfig.h"
57 #include "SquidTime.h"
63 #include "auth/UserRequest.h"
66 #include "DelayPools.h"
74 CBDATA_CLASS_INIT(clientReplyContext
);
77 extern "C" CSS clientReplyStatus
;
78 ErrorState
*clientBuildError(err_type
, Http::StatusCode
, char const *, Ip::Address
&, HttpRequest
*);
82 clientReplyContext::~clientReplyContext()
85 /* This may trigger a callback back into SendMoreData as the cbdata
88 removeClientStoreReference(&sc
, http
);
89 /* old_entry might still be set if we didn't yet get the reply
90 * code in HandleIMSReply() */
91 removeStoreReference(&old_sc
, &old_entry
);
92 safe_free(tempBuffer
.data
);
93 cbdataReferenceDone(http
);
97 clientReplyContext::clientReplyContext(ClientHttpRequest
*clientContext
) : http (cbdataReference(clientContext
)), old_entry (NULL
), old_sc(NULL
), deleting(false)
100 /** Create an error in the store awaiting the client side to read it.
102 * This may be better placed in the clientStream logic, but it has not been
103 * relocated there yet
106 clientReplyContext::setReplyToError(
107 err_type err
, Http::StatusCode status
, const HttpRequestMethod
& method
, char const *uri
,
108 Ip::Address
&addr
, HttpRequest
* failedrequest
, const char *unparsedrequest
,
110 Auth::UserRequest::Pointer auth_user_request
116 ErrorState
*errstate
= clientBuildError(err
, status
, uri
, addr
, failedrequest
);
119 errstate
->request_hdrs
= xstrdup(unparsedrequest
);
122 errstate
->auth_user_request
= auth_user_request
;
124 setReplyToError(method
, errstate
);
127 void clientReplyContext::setReplyToError(const HttpRequestMethod
& method
, ErrorState
*errstate
)
129 if (errstate
->httpStatus
== Http::scNotImplemented
&& http
->request
)
130 /* prevent confusion over whether we default to persistent or not */
131 http
->request
->flags
.proxyKeepalive
= false;
133 http
->al
->http
.code
= errstate
->httpStatus
;
136 http
->request
->ignoreRange("responding with a Squid-generated error");
138 createStoreEntry(method
, RequestFlags());
139 assert(errstate
->callback_data
== NULL
);
140 errorAppendEntry(http
->storeEntry(), errstate
);
141 /* Now the caller reads to get this */
144 // Assumes that the entry contains an error response without Content-Range.
145 // To use with regular entries, make HTTP Range header removal conditional.
146 void clientReplyContext::setReplyToStoreEntry(StoreEntry
*entry
, const char *reason
)
148 entry
->lock("clientReplyContext::setReplyToStoreEntry"); // removeClientStoreReference() unlocks
149 sc
= storeClientListAdd(entry
, this);
151 sc
->setDelayId(DelayId::DelayClient(http
));
156 http
->request
->ignoreRange(reason
);
157 flags
.storelogiccomplete
= 1;
158 http
->storeEntry(entry
);
162 clientReplyContext::removeStoreReference(store_client
** scp
,
166 store_client
*sc_tmp
= *scp
;
168 if ((e
= *ep
) != NULL
) {
170 storeUnregister(sc_tmp
, e
, this);
172 e
->unlock("clientReplyContext::removeStoreReference");
177 clientReplyContext::removeClientStoreReference(store_client
**scp
, ClientHttpRequest
*aHttpRequest
)
179 StoreEntry
*reference
= aHttpRequest
->storeEntry();
180 removeStoreReference(scp
, &reference
);
181 aHttpRequest
->storeEntry(reference
);
185 clientReplyContext::saveState()
187 assert(old_sc
== NULL
);
188 debugs(88, 3, "clientReplyContext::saveState: saving store context");
189 old_entry
= http
->storeEntry();
191 old_reqsize
= reqsize
;
192 tempBuffer
.offset
= reqofs
;
193 /* Prevent accessing the now saved entries */
194 http
->storeEntry(NULL
);
201 clientReplyContext::restoreState()
203 assert(old_sc
!= NULL
);
204 debugs(88, 3, "clientReplyContext::restoreState: Restoring store context");
205 removeClientStoreReference(&sc
, http
);
206 http
->storeEntry(old_entry
);
208 reqsize
= old_reqsize
;
209 reqofs
= tempBuffer
.offset
;
210 /* Prevent accessed the old saved entries */
214 tempBuffer
.offset
= 0;
218 clientReplyContext::startError(ErrorState
* err
)
220 createStoreEntry(http
->request
->method
, RequestFlags());
221 triggerInitialStoreRead();
222 errorAppendEntry(http
->storeEntry(), err
);
226 clientReplyContext::getNextNode() const
228 return (clientStreamNode
*)ourNode
->node
.next
->data
;
231 /* This function is wrong - the client parameters don't include the
235 clientReplyContext::triggerInitialStoreRead()
237 /* when confident, 0 becomes reqofs, and then this factors into
241 StoreIOBuffer
localTempBuffer (next()->readBuffer
.length
, 0, next()->readBuffer
.data
);
242 storeClientCopy(sc
, http
->storeEntry(), localTempBuffer
, SendMoreData
, this);
245 /* there is an expired entry in the store.
246 * setup a temporary buffer area and perform an IMS to the origin
249 clientReplyContext::processExpired()
251 const char *url
= storeId();
252 StoreEntry
*entry
= NULL
;
253 debugs(88, 3, "clientReplyContext::processExpired: '" << http
->uri
<< "'");
254 assert(http
->storeEntry()->lastmod
>= 0);
256 * check if we are allowed to contact other servers
257 * @?@: Instead of a 504 (Gateway Timeout) reply, we may want to return
258 * a stale entry *if* it matches client requirements
261 if (http
->onlyIfCached()) {
262 processOnlyIfCachedMiss();
266 http
->request
->flags
.refresh
= true;
267 #if STORE_CLIENT_LIST_DEBUG
268 /* Prevent a race with the store client memory free routines
270 assert(storeClientIsThisAClient(sc
, this));
272 /* Prepare to make a new temporary request */
274 entry
= storeCreateEntry(url
,
275 http
->log_uri
, http
->request
->flags
, http
->request
->method
);
276 /* NOTE, don't call StoreEntry->lock(), storeCreateEntry() does it */
277 sc
= storeClientListAdd(entry
, this);
279 /* delay_id is already set on original store client */
280 sc
->setDelayId(DelayId::DelayClient(http
));
283 http
->request
->lastmod
= old_entry
->lastmod
;
285 if (!http
->request
->header
.has(HDR_IF_NONE_MATCH
)) {
286 ETag etag
= {NULL
, -1}; // TODO: make that a default ETag constructor
287 if (old_entry
->hasEtag(etag
) && !etag
.weak
)
288 http
->request
->etag
= etag
.str
;
291 debugs(88, 5, "clientReplyContext::processExpired : lastmod " << entry
->lastmod
);
292 http
->storeEntry(entry
);
293 assert(http
->out
.offset
== 0);
294 assert(http
->request
->clientConnectionManager
== http
->getConn());
297 * A refcounted pointer so that FwdState stays around as long as
298 * this clientReplyContext does
300 Comm::ConnectionPointer conn
= http
->getConn() != NULL
? http
->getConn()->clientConnection
: NULL
;
301 FwdState::Start(conn
, http
->storeEntry(), http
->request
, http
->al
);
303 /* Register with storage manager to receive updates when data comes in. */
305 if (EBIT_TEST(entry
->flags
, ENTRY_ABORTED
))
306 debugs(88, DBG_CRITICAL
, "clientReplyContext::processExpired: Found ENTRY_ABORTED object");
309 /* start counting the length from 0 */
310 StoreIOBuffer
localTempBuffer(HTTP_REQBUF_SZ
, 0, tempbuf
);
311 storeClientCopy(sc
, entry
, localTempBuffer
, HandleIMSReply
, this);
316 clientReplyContext::sendClientUpstreamResponse()
318 StoreIOBuffer tempresult
;
319 removeStoreReference(&old_sc
, &old_entry
);
320 /* here the data to send is the data we just received */
321 tempBuffer
.offset
= 0;
323 /* sendMoreData tracks the offset as well.
324 * Force it back to zero */
326 assert(!EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
));
327 /* TODO: provide sendMoreData with the ready parsed reply */
328 tempresult
.length
= reqsize
;
329 tempresult
.data
= tempbuf
;
330 sendMoreData(tempresult
);
334 clientReplyContext::HandleIMSReply(void *data
, StoreIOBuffer result
)
336 clientReplyContext
*context
= (clientReplyContext
*)data
;
337 context
->handleIMSReply(result
);
341 clientReplyContext::sendClientOldEntry()
343 /* Get the old request back */
345 /* here the data to send is in the next nodes buffers already */
346 assert(!EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
));
347 /* sendMoreData tracks the offset as well.
348 * Force it back to zero */
350 StoreIOBuffer
tempresult (reqsize
, reqofs
, next()->readBuffer
.data
);
351 sendMoreData(tempresult
);
354 /* This is the workhorse of the HandleIMSReply callback.
356 * It is called when we've got data back from the origin following our
357 * IMS request to revalidate a stale entry.
360 clientReplyContext::handleIMSReply(StoreIOBuffer result
)
365 debugs(88, 3, "handleIMSReply: " << http
->storeEntry()->url() << ", " << (long unsigned) result
.length
<< " bytes" );
367 if (http
->storeEntry() == NULL
)
370 if (result
.flags
.error
&& !EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
))
373 /* update size of the request */
374 reqsize
= result
.length
+ reqofs
;
376 const Http::StatusCode status
= http
->storeEntry()->getReply()->sline
.status();
378 // request to origin was aborted
379 if (EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
)) {
380 debugs(88, 3, "handleIMSReply: request to origin aborted '" << http
->storeEntry()->url() << "', sending old entry to client" );
381 http
->logType
= LOG_TCP_REFRESH_FAIL_OLD
;
382 sendClientOldEntry();
385 HttpReply
*old_rep
= (HttpReply
*) old_entry
->getReply();
387 // origin replied 304
388 if (status
== Http::scNotModified
) {
389 http
->logType
= LOG_TCP_REFRESH_UNMODIFIED
;
390 http
->request
->flags
.staleIfHit
= false; // old_entry is no longer stale
392 // update headers on existing entry
393 old_rep
->updateOnNotModified(http
->storeEntry()->getReply());
394 old_entry
->timestampsSet();
396 // if client sent IMS
398 if (http
->request
->flags
.ims
&& !old_entry
->modifiedSince(http
->request
)) {
399 // forward the 304 from origin
400 debugs(88, 3, "handleIMSReply: origin replied 304, revalidating existing entry and forwarding 304 to client");
401 sendClientUpstreamResponse();
403 // send existing entry, it's still valid
404 debugs(88, 3, "handleIMSReply: origin replied 304, revalidating existing entry and sending " <<
405 old_rep
->sline
.status() << " to client");
406 sendClientOldEntry();
410 // origin replied with a non-error code
411 else if (status
> Http::scNone
&& status
< Http::scInternalServerError
) {
412 // forward response from origin
413 http
->logType
= LOG_TCP_REFRESH_MODIFIED
;
414 debugs(88, 3, "handleIMSReply: origin replied " << status
<< ", replacing existing entry and forwarding to client");
415 sendClientUpstreamResponse();
418 // origin replied with an error
419 else if (http
->request
->flags
.failOnValidationError
) {
420 http
->logType
= LOG_TCP_REFRESH_FAIL_ERR
;
421 debugs(88, 3, "handleIMSReply: origin replied with error " << status
<<
422 ", forwarding to client due to fail_on_validation_err");
423 sendClientUpstreamResponse();
425 // ignore and let client have old entry
426 http
->logType
= LOG_TCP_REFRESH_FAIL_OLD
;
427 debugs(88, 3, "handleIMSReply: origin replied with error " <<
428 status
<< ", sending old entry (" << old_rep
->sline
.status() << ") to client");
429 sendClientOldEntry();
433 SQUIDCEXTERN CSR clientGetMoreData
;
434 SQUIDCEXTERN CSD clientReplyDetach
;
437 * clientReplyContext::cacheHit Should only be called until the HTTP reply headers
438 * have been parsed. Normally this should be a single call, but
439 * it might take more than one. As soon as we have the headers,
440 * we hand off to clientSendMoreData, processExpired, or
444 clientReplyContext::CacheHit(void *data
, StoreIOBuffer result
)
446 clientReplyContext
*context
= (clientReplyContext
*)data
;
447 context
->cacheHit(result
);
451 * Process a possible cache HIT.
454 clientReplyContext::cacheHit(StoreIOBuffer result
)
456 /** Ignore if the HIT object is being deleted. */
458 debugs(88, 3, "HIT object being deleted. Ignore the HIT.");
462 StoreEntry
*e
= http
->storeEntry();
464 HttpRequest
*r
= http
->request
;
466 debugs(88, 3, "clientCacheHit: " << http
->uri
<< ", " << result
.length
<< " bytes");
468 if (http
->storeEntry() == NULL
) {
469 debugs(88, 3, "clientCacheHit: request aborted");
471 } else if (result
.flags
.error
) {
472 /* swap in failure */
473 debugs(88, 3, "clientCacheHit: swapin failure for " << http
->uri
);
474 http
->logType
= LOG_TCP_SWAPFAIL_MISS
;
475 removeClientStoreReference(&sc
, http
);
480 if (result
.length
== 0) {
481 debugs(88, 5, "store IO buffer has no content. MISS");
482 /* the store couldn't get enough data from the file for us to id the
485 /* treat as a miss */
486 http
->logType
= LOG_TCP_MISS
;
491 assert(!EBIT_TEST(e
->flags
, ENTRY_ABORTED
));
492 /* update size of the request */
493 reqsize
= result
.length
+ reqofs
;
496 * Got the headers, now grok them
498 assert(http
->logType
== LOG_TCP_HIT
);
500 if (strcmp(e
->mem_obj
->storeId(), http
->request
->storeId()) != 0) {
501 debugs(33, DBG_IMPORTANT
, "clientProcessHit: URL mismatch, '" << e
->mem_obj
->storeId() << "' != '" << http
->request
->storeId() << "'");
502 http
->logType
= LOG_TCP_MISS
; // we lack a more precise LOG_*_MISS code
507 switch (varyEvaluateMatch(e
, r
)) {
510 /* No variance detected. Continue as normal */
514 /* This is the correct entity for this request. Continue */
515 debugs(88, 2, "clientProcessHit: Vary MATCH!");
519 /* This is not the correct entity for this request. We need
520 * to requery the cache.
522 removeClientStoreReference(&sc
, http
);
524 /* Note: varyEvalyateMatch updates the request with vary information
525 * so we only get here once. (it also takes care of cancelling loops)
527 debugs(88, 2, "clientProcessHit: Vary detected!");
528 clientGetMoreData(ourNode
, http
);
532 /* varyEvaluateMatch found a object loop. Process as miss */
533 debugs(88, DBG_IMPORTANT
, "clientProcessHit: Vary object loop!");
534 http
->logType
= LOG_TCP_MISS
; // we lack a more precise LOG_*_MISS code
539 if (r
->method
== Http::METHOD_PURGE
) {
540 debugs(88, 5, "PURGE gets a HIT");
541 removeClientStoreReference(&sc
, http
);
547 if (e
->checkNegativeHit() && !r
->flags
.noCacheHack()) {
548 debugs(88, 5, "negative-HIT");
549 http
->logType
= LOG_TCP_NEGATIVE_HIT
;
550 sendMoreData(result
);
551 } else if (blockedHit()) {
552 debugs(88, 5, "send_hit forces a MISS");
553 http
->logType
= LOG_TCP_MISS
;
556 } else if (!http
->flags
.internal
&& refreshCheckHTTP(e
, r
)) {
557 debugs(88, 5, "clientCacheHit: in refreshCheck() block");
559 * We hold a stale copy; it needs to be validated
562 * The 'needValidation' flag is used to prevent forwarding
563 * loops between siblings. If our copy of the object is stale,
564 * then we should probably only use parents for the validation
565 * request. Otherwise two siblings could generate a loop if
566 * both have a stale version of the object.
568 r
->flags
.needValidation
= true;
570 if (e
->lastmod
< 0) {
571 debugs(88, 3, "validate HIT object? NO. Missing Last-Modified header. Do MISS.");
573 * Previous reply didn't have a Last-Modified header,
574 * we cannot revalidate it.
576 http
->logType
= LOG_TCP_MISS
;
578 } else if (r
->flags
.noCache
) {
579 debugs(88, 3, "validate HIT object? NO. Client sent CC:no-cache. Do CLIENT_REFRESH_MISS");
581 * This did not match a refresh pattern that overrides no-cache
582 * we should honour the client no-cache header.
584 http
->logType
= LOG_TCP_CLIENT_REFRESH_MISS
;
586 } else if (r
->protocol
== AnyP::PROTO_HTTP
) {
587 debugs(88, 3, "validate HIT object? YES.");
589 * Object needs to be revalidated
590 * XXX This could apply to FTP as well, if Last-Modified is known.
594 debugs(88, 3, "validate HIT object? NO. Client protocol non-HTTP. Do MISS.");
596 * We don't know how to re-validate other protocols. Handle
597 * them as if the object has expired.
599 http
->logType
= LOG_TCP_MISS
;
602 } else if (r
->conditional()) {
603 debugs(88, 5, "conditional HIT");
604 processConditional(result
);
607 * plain ol' cache hit
609 debugs(88, 5, "plain old HIT");
612 if (e
->store_status
!= STORE_OK
)
613 http
->logType
= LOG_TCP_MISS
;
616 if (e
->mem_status
== IN_MEMORY
)
617 http
->logType
= LOG_TCP_MEM_HIT
;
618 else if (Config
.onoff
.offline
)
619 http
->logType
= LOG_TCP_OFFLINE_HIT
;
621 sendMoreData(result
);
626 * Prepare to fetch the object as it's a cache miss of some kind.
629 clientReplyContext::processMiss()
631 char *url
= http
->uri
;
632 HttpRequest
*r
= http
->request
;
633 ErrorState
*err
= NULL
;
634 debugs(88, 4, r
->method
<< ' ' << url
);
637 * We might have a left-over StoreEntry from a failed cache hit
640 if (http
->storeEntry()) {
641 if (EBIT_TEST(http
->storeEntry()->flags
, ENTRY_SPECIAL
)) {
642 debugs(88, DBG_CRITICAL
, "clientProcessMiss: miss on a special object (" << url
<< ").");
643 debugs(88, DBG_CRITICAL
, "\tlog_type = " << LogTags_str
[http
->logType
]);
644 http
->storeEntry()->dump(1);
647 removeClientStoreReference(&sc
, http
);
650 /** Check if its a PURGE request to be actioned. */
651 if (r
->method
== Http::METHOD_PURGE
) {
656 /** Check if its an 'OTHER' request. Purge all cached entries if so and continue. */
657 if (r
->method
== Http::METHOD_OTHER
) {
661 /** Check if 'only-if-cached' flag is set. Action if so. */
662 if (http
->onlyIfCached()) {
663 processOnlyIfCachedMiss();
668 if (r
->flags
.loopDetected
) {
669 http
->al
->http
.code
= Http::scForbidden
;
670 err
= clientBuildError(ERR_ACCESS_DENIED
, Http::scForbidden
, NULL
, http
->getConn()->clientConnection
->remote
, http
->request
);
671 createStoreEntry(r
->method
, RequestFlags());
672 errorAppendEntry(http
->storeEntry(), err
);
673 triggerInitialStoreRead();
676 assert(http
->out
.offset
== 0);
677 createStoreEntry(r
->method
, r
->flags
);
678 triggerInitialStoreRead();
680 if (http
->redirect
.status
) {
681 HttpReply
*rep
= new HttpReply
;
682 http
->logType
= LOG_TCP_REDIRECT
;
683 http
->storeEntry()->releaseRequest();
684 rep
->redirect(http
->redirect
.status
, http
->redirect
.location
);
685 http
->storeEntry()->replaceHttpReply(rep
);
686 http
->storeEntry()->complete();
690 /** Check for internal requests. Update Protocol info if so. */
691 if (http
->flags
.internal
)
692 r
->protocol
= AnyP::PROTO_INTERNAL
;
694 assert(r
->clientConnectionManager
== http
->getConn());
696 /** Start forwarding to get the new object from network */
697 Comm::ConnectionPointer conn
= http
->getConn() != NULL
? http
->getConn()->clientConnection
: NULL
;
698 FwdState::Start(conn
, http
->storeEntry(), r
, http
->al
);
703 * client issued a request with an only-if-cached cache-control directive;
704 * we did not find a cached object that can be returned without
705 * contacting other servers;
706 * respond with a 504 (Gateway Timeout) as suggested in [RFC 2068]
709 clientReplyContext::processOnlyIfCachedMiss()
711 debugs(88, 4, http
->request
->method
<< ' ' << http
->uri
);
712 http
->al
->http
.code
= Http::scGatewayTimeout
;
713 ErrorState
*err
= clientBuildError(ERR_ONLY_IF_CACHED_MISS
, Http::scGatewayTimeout
, NULL
,
714 http
->getConn()->clientConnection
->remote
, http
->request
);
715 removeClientStoreReference(&sc
, http
);
719 /// process conditional request from client
721 clientReplyContext::processConditional(StoreIOBuffer
&result
)
723 StoreEntry
*const e
= http
->storeEntry();
725 if (e
->getReply()->sline
.status() != Http::scOkay
) {
726 debugs(88, 4, "clientReplyContext::processConditional: Reply code " <<
727 e
->getReply()->sline
.status() << " != 200");
728 http
->logType
= LOG_TCP_MISS
;
733 HttpRequest
&r
= *http
->request
;
735 if (r
.header
.has(HDR_IF_MATCH
) && !e
->hasIfMatchEtag(r
)) {
736 // RFC 2616: reply with 412 Precondition Failed if If-Match did not match
737 sendPreconditionFailedError();
741 bool matchedIfNoneMatch
= false;
742 if (r
.header
.has(HDR_IF_NONE_MATCH
)) {
743 if (!e
->hasIfNoneMatchEtag(r
)) {
744 // RFC 2616: ignore IMS if If-None-Match did not match
748 r
.header
.delById(HDR_IF_MODIFIED_SINCE
);
749 http
->logType
= LOG_TCP_MISS
;
750 sendMoreData(result
);
755 // RFC 2616: if If-None-Match matched and there is no IMS,
756 // reply with 304 Not Modified or 412 Precondition Failed
757 sendNotModifiedOrPreconditionFailedError();
761 // otherwise check IMS below to decide if we reply with 304 or 412
762 matchedIfNoneMatch
= true;
766 // handle If-Modified-Since requests from the client
767 if (e
->modifiedSince(&r
)) {
768 http
->logType
= LOG_TCP_IMS_HIT
;
769 sendMoreData(result
);
773 if (matchedIfNoneMatch
) {
774 // If-None-Match matched, reply with 304 Not Modified or
775 // 412 Precondition Failed
776 sendNotModifiedOrPreconditionFailedError();
780 // otherwise reply with 304 Not Modified
785 /// whether squid.conf send_hit prevents us from serving this hit
787 clientReplyContext::blockedHit() const
789 if (!Config
.accessList
.sendHit
)
790 return false; // hits are not blocked by default
792 if (http
->flags
.internal
)
793 return false; // internal content "hits" cannot be blocked
795 if (const HttpReply
*rep
= http
->storeEntry()->getReply()) {
796 std::auto_ptr
<ACLFilledChecklist
> chl(clientAclChecklistCreate(Config
.accessList
.sendHit
, http
));
797 chl
->reply
= const_cast<HttpReply
*>(rep
); // ACLChecklist API bug
798 HTTPMSGLOCK(chl
->reply
);
799 return chl
->fastCheck() != ACCESS_ALLOWED
; // when in doubt, block
802 // This does not happen, I hope, because we are called from CacheHit, which
803 // is called via a storeClientCopy() callback, and store should initialize
804 // the reply before calling that callback.
805 debugs(88, 3, "Missing reply!");
810 clientReplyContext::purgeRequestFindObjectToPurge()
812 /* Try to find a base entry */
813 http
->flags
.purging
= true;
816 // TODO: can we use purgeAllCached() here instead of doing the
817 // getPublicByRequestMethod() dance?
818 StoreEntry::getPublicByRequestMethod(this, http
->request
, Http::METHOD_GET
);
821 // Purges all entries with a given url
822 // TODO: move to SideAgent parent, when we have one
824 * We probably cannot purge Vary-affected responses because their MD5
825 * keys depend on vary headers.
828 purgeEntriesByUrl(HttpRequest
* req
, const char *url
)
831 bool get_or_head_sent
= false;
834 for (HttpRequestMethod
m(Http::METHOD_NONE
); m
!= Http::METHOD_ENUM_END
; ++m
) {
835 if (m
.respMaybeCacheable()) {
836 if (StoreEntry
*entry
= storeGetPublic(url
, m
)) {
837 debugs(88, 5, "purging " << *entry
<< ' ' << m
<< ' ' << url
);
839 neighborsHtcpClear(entry
, url
, req
, m
, HTCP_CLR_INVALIDATION
);
840 if (m
== Http::METHOD_GET
|| m
== Http::METHOD_HEAD
) {
841 get_or_head_sent
= true;
850 if (!get_or_head_sent
) {
851 neighborsHtcpClear(NULL
, url
, req
, HttpRequestMethod(Http::METHOD_GET
), HTCP_CLR_INVALIDATION
);
857 clientReplyContext::purgeAllCached()
859 const char *url
= urlCanonical(http
->request
);
860 purgeEntriesByUrl(http
->request
, url
);
864 clientReplyContext::created(StoreEntry
*newEntry
)
866 if (lookingforstore
== 1)
867 purgeFoundGet(newEntry
);
868 else if (lookingforstore
== 2)
869 purgeFoundHead(newEntry
);
870 else if (lookingforstore
== 3)
871 purgeDoPurgeGet(newEntry
);
872 else if (lookingforstore
== 4)
873 purgeDoPurgeHead(newEntry
);
874 else if (lookingforstore
== 5)
875 identifyFoundObject(newEntry
);
879 clientReplyContext::purgeFoundGet(StoreEntry
*newEntry
)
881 if (newEntry
->isNull()) {
883 StoreEntry::getPublicByRequestMethod(this, http
->request
, Http::METHOD_HEAD
);
885 purgeFoundObject (newEntry
);
889 clientReplyContext::purgeFoundHead(StoreEntry
*newEntry
)
891 if (newEntry
->isNull())
894 purgeFoundObject (newEntry
);
898 clientReplyContext::purgeFoundObject(StoreEntry
*entry
)
900 assert (entry
&& !entry
->isNull());
902 if (EBIT_TEST(entry
->flags
, ENTRY_SPECIAL
)) {
903 http
->logType
= LOG_TCP_DENIED
;
904 ErrorState
*err
= clientBuildError(ERR_ACCESS_DENIED
, Http::scForbidden
, NULL
,
905 http
->getConn()->clientConnection
->remote
, http
->request
);
907 return; // XXX: leaking unused entry if some store does not keep it
910 StoreIOBuffer localTempBuffer
;
911 /* Swap in the metadata */
912 http
->storeEntry(entry
);
914 http
->storeEntry()->lock("clientReplyContext::purgeFoundObject");
915 http
->storeEntry()->createMemObject(storeId(), http
->log_uri
,
916 http
->request
->method
);
918 sc
= storeClientListAdd(http
->storeEntry(), this);
920 http
->logType
= LOG_TCP_HIT
;
924 localTempBuffer
.offset
= http
->out
.offset
;
926 localTempBuffer
.length
= next()->readBuffer
.length
;
928 localTempBuffer
.data
= next()->readBuffer
.data
;
930 storeClientCopy(sc
, http
->storeEntry(),
931 localTempBuffer
, CacheHit
, this);
935 clientReplyContext::purgeRequest()
937 debugs(88, 3, "Config2.onoff.enable_purge = " <<
938 Config2
.onoff
.enable_purge
);
940 if (!Config2
.onoff
.enable_purge
) {
941 http
->logType
= LOG_TCP_DENIED
;
942 ErrorState
*err
= clientBuildError(ERR_ACCESS_DENIED
, Http::scForbidden
, NULL
, http
->getConn()->clientConnection
->remote
, http
->request
);
947 /* Release both IP cache */
948 ipcacheInvalidate(http
->request
->GetHost());
950 if (!http
->flags
.purging
)
951 purgeRequestFindObjectToPurge();
957 clientReplyContext::purgeDoMissPurge()
959 http
->logType
= LOG_TCP_MISS
;
961 StoreEntry::getPublicByRequestMethod(this,http
->request
, Http::METHOD_GET
);
965 clientReplyContext::purgeDoPurgeGet(StoreEntry
*newEntry
)
968 /* Move to new() when that is created */
969 purgeStatus
= Http::scNotFound
;
971 if (!newEntry
->isNull()) {
972 /* Release the cached URI */
973 debugs(88, 4, "clientPurgeRequest: GET '" << newEntry
->url() << "'" );
975 neighborsHtcpClear(newEntry
, NULL
, http
->request
, HttpRequestMethod(Http::METHOD_GET
), HTCP_CLR_PURGE
);
978 purgeStatus
= Http::scOkay
;
982 StoreEntry::getPublicByRequestMethod(this, http
->request
, Http::METHOD_HEAD
);
986 clientReplyContext::purgeDoPurgeHead(StoreEntry
*newEntry
)
988 if (newEntry
&& !newEntry
->isNull()) {
989 debugs(88, 4, "clientPurgeRequest: HEAD '" << newEntry
->url() << "'" );
991 neighborsHtcpClear(newEntry
, NULL
, http
->request
, HttpRequestMethod(Http::METHOD_HEAD
), HTCP_CLR_PURGE
);
994 purgeStatus
= Http::scOkay
;
997 /* And for Vary, release the base URI if none of the headers was included in the request */
999 if (http
->request
->vary_headers
1000 && !strstr(http
->request
->vary_headers
, "=")) {
1001 StoreEntry
*entry
= storeGetPublic(urlCanonical(http
->request
), Http::METHOD_GET
);
1004 debugs(88, 4, "clientPurgeRequest: Vary GET '" << entry
->url() << "'" );
1006 neighborsHtcpClear(entry
, NULL
, http
->request
, HttpRequestMethod(Http::METHOD_GET
), HTCP_CLR_PURGE
);
1009 purgeStatus
= Http::scOkay
;
1012 entry
= storeGetPublic(urlCanonical(http
->request
), Http::METHOD_HEAD
);
1015 debugs(88, 4, "clientPurgeRequest: Vary HEAD '" << entry
->url() << "'" );
1017 neighborsHtcpClear(entry
, NULL
, http
->request
, HttpRequestMethod(Http::METHOD_HEAD
), HTCP_CLR_PURGE
);
1020 purgeStatus
= Http::scOkay
;
1025 * Make a new entry to hold the reply to be written
1028 /* FIXME: This doesn't need to go through the store. Simply
1029 * push down the client chain
1031 createStoreEntry(http
->request
->method
, RequestFlags());
1033 triggerInitialStoreRead();
1035 HttpReply
*rep
= new HttpReply
;
1036 rep
->setHeaders(purgeStatus
, NULL
, NULL
, 0, 0, -1);
1037 http
->storeEntry()->replaceHttpReply(rep
);
1038 http
->storeEntry()->complete();
1042 clientReplyContext::traceReply(clientStreamNode
* node
)
1044 clientStreamNode
*nextNode
= (clientStreamNode
*)node
->node
.next
->data
;
1045 StoreIOBuffer localTempBuffer
;
1046 createStoreEntry(http
->request
->method
, RequestFlags());
1047 localTempBuffer
.offset
= nextNode
->readBuffer
.offset
+ headers_sz
;
1048 localTempBuffer
.length
= nextNode
->readBuffer
.length
;
1049 localTempBuffer
.data
= nextNode
->readBuffer
.data
;
1050 storeClientCopy(sc
, http
->storeEntry(),
1051 localTempBuffer
, SendMoreData
, this);
1052 http
->storeEntry()->releaseRequest();
1053 http
->storeEntry()->buffer();
1054 HttpReply
*rep
= new HttpReply
;
1055 rep
->setHeaders(Http::scOkay
, NULL
, "text/plain", http
->request
->prefixLen(), 0, squid_curtime
);
1056 http
->storeEntry()->replaceHttpReply(rep
);
1057 http
->request
->swapOut(http
->storeEntry());
1058 http
->storeEntry()->complete();
1061 #define SENDING_BODY 0
1062 #define SENDING_HDRSONLY 1
1064 clientReplyContext::checkTransferDone()
1066 StoreEntry
*entry
= http
->storeEntry();
1072 * For now, 'done_copying' is used for special cases like
1073 * Range and HEAD requests.
1075 if (http
->flags
.done_copying
)
1078 if (http
->request
->flags
.chunkedReply
&& !flags
.complete
) {
1079 // last-chunk was not sent
1084 * Handle STORE_OK objects.
1085 * objectLen(entry) will be set proprely.
1086 * RC: Does objectLen(entry) include the Headers?
1089 if (entry
->store_status
== STORE_OK
) {
1090 return storeOKTransferDone();
1092 return storeNotOKTransferDone();
1097 clientReplyContext::storeOKTransferDone() const
1099 assert(http
->storeEntry()->objectLen() >= 0);
1100 assert(http
->storeEntry()->objectLen() >= headers_sz
);
1101 if (http
->out
.offset
>= http
->storeEntry()->objectLen() - headers_sz
) {
1102 debugs(88,3,HERE
<< "storeOKTransferDone " <<
1103 " out.offset=" << http
->out
.offset
<<
1104 " objectLen()=" << http
->storeEntry()->objectLen() <<
1105 " headers_sz=" << headers_sz
);
1113 clientReplyContext::storeNotOKTransferDone() const
1116 * Now, handle STORE_PENDING objects
1118 MemObject
*mem
= http
->storeEntry()->mem_obj
;
1119 assert(mem
!= NULL
);
1120 assert(http
->request
!= NULL
);
1121 /* mem->reply was wrong because it uses the UPSTREAM header length!!! */
1122 HttpReply
const *curReply
= mem
->getReply();
1124 if (headers_sz
== 0)
1125 /* haven't found end of headers yet */
1129 * Figure out how much data we are supposed to send.
1130 * If we are sending a body and we don't have a content-length,
1131 * then we must wait for the object to become STORE_OK.
1133 if (curReply
->content_length
< 0)
1136 int64_t expectedLength
= curReply
->content_length
+ http
->out
.headers_sz
;
1138 if (http
->out
.size
< expectedLength
)
1141 debugs(88,3,HERE
<< "storeNotOKTransferDone " <<
1142 " out.size=" << http
->out
.size
<<
1143 " expectedLength=" << expectedLength
);
1148 /* A write has completed, what is the next status based on the
1149 * canonical request data?
1150 * 1 something is wrong
1151 * 0 nothing is wrong.
1155 clientHttpRequestStatus(int fd
, ClientHttpRequest
const *http
)
1157 #if SIZEOF_INT64_T == 4
1158 if (http
->out
.size
> 0x7FFF0000) {
1159 debugs(88, DBG_IMPORTANT
, "WARNING: closing FD " << fd
<< " to prevent out.size counter overflow");
1160 debugs(88, DBG_IMPORTANT
, "\tclient " << http
->getConn()->peer
);
1161 debugs(88, DBG_IMPORTANT
, "\treceived " << http
->out
.size
<< " bytes");
1162 debugs(88, DBG_IMPORTANT
, "\tURI " << http
->log_uri
);
1166 if (http
->out
.offset
> 0x7FFF0000) {
1167 debugs(88, DBG_IMPORTANT
, "WARNING: closing FD " << fd
< " to prevent out.offset counter overflow");
1168 debugs(88, DBG_IMPORTANT
, "\tclient " << http
->getConn()->peer
);
1169 debugs(88, DBG_IMPORTANT
, "\treceived " << http
->out
.size
<< " bytes, offset " << http
->out
.offset
);
1170 debugs(88, DBG_IMPORTANT
, "\tURI " << http
->log_uri
);
1179 * *http is a valid structure.
1180 * fd is either -1, or an open fd.
1182 * TODO: enumify this
1184 * This function is used by any http request sink, to determine the status
1187 clientStream_status_t
1188 clientReplyStatus(clientStreamNode
* aNode
, ClientHttpRequest
* http
)
1190 clientReplyContext
*context
= dynamic_cast<clientReplyContext
*>(aNode
->data
.getRaw());
1192 assert (context
->http
== http
);
1193 return context
->replyStatus();
1196 clientStream_status_t
1197 clientReplyContext::replyStatus()
1200 /* Here because lower nodes don't need it */
1202 if (http
->storeEntry() == NULL
) {
1203 debugs(88, 5, "clientReplyStatus: no storeEntry");
1204 return STREAM_FAILED
; /* yuck, but what can we do? */
1207 if (EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
)) {
1208 /* TODO: Could upstream read errors (result.flags.error) be
1209 * lost, and result in undersize requests being considered
1210 * complete. Should we tcp reset such connections ?
1212 debugs(88, 5, "clientReplyStatus: aborted storeEntry");
1213 return STREAM_FAILED
;
1216 if ((done
= checkTransferDone()) != 0 || flags
.complete
) {
1217 debugs(88, 5, "clientReplyStatus: transfer is DONE: " << done
<< flags
.complete
);
1218 /* Ok we're finished, but how? */
1220 const int64_t expectedBodySize
=
1221 http
->storeEntry()->getReply()->bodySize(http
->request
->method
);
1222 if (!http
->request
->flags
.proxyKeepalive
&& expectedBodySize
< 0) {
1223 debugs(88, 5, "clientReplyStatus: closing, content_length < 0");
1224 return STREAM_FAILED
;
1228 debugs(88, 5, "clientReplyStatus: closing, !done, but read 0 bytes");
1229 return STREAM_FAILED
;
1232 if (expectedBodySize
>= 0 && !http
->gotEnough()) {
1233 debugs(88, 5, "clientReplyStatus: client didn't get all it expected");
1234 return STREAM_UNPLANNED_COMPLETE
;
1237 debugs(88, 5, "clientReplyStatus: stream complete; keepalive=" <<
1238 http
->request
->flags
.proxyKeepalive
);
1239 return STREAM_COMPLETE
;
1242 // XXX: Should this be checked earlier? We could return above w/o checking.
1243 if (reply
->receivedBodyTooLarge(*http
->request
, http
->out
.offset
- 4096)) {
1244 /* 4096 is a margin for the HTTP headers included in out.offset */
1245 debugs(88, 5, "clientReplyStatus: client reply body is too large");
1246 return STREAM_FAILED
;
1252 /* Responses with no body will not have a content-type header,
1253 * which breaks the rep_mime_type acl, which
1254 * coincidentally, is the most common acl for reply access lists.
1255 * A better long term fix for this is to allow acl matchs on the various
1256 * status codes, and then supply a default ruleset that puts these
1257 * codes before any user defines access entries. That way the user
1258 * can choose to block these responses where appropriate, but won't get
1259 * mysterious breakages.
1262 clientReplyContext::alwaysAllowResponse(Http::StatusCode sline
) const
1268 case Http::scContinue
:
1270 case Http::scSwitchingProtocols
:
1272 case Http::scProcessing
:
1274 case Http::scNoContent
:
1276 case Http::scNotModified
:
1288 * Generate the reply headers sent to client.
1290 * Filters out unwanted entries and hop-by-hop from original reply header
1291 * then adds extra entries if we have more info than origin server
1292 * then adds Squid specific entries
1295 clientReplyContext::buildReplyHeader()
1297 HttpHeader
*hdr
= &reply
->header
;
1298 int is_hit
= logTypeIsATcpHit(http
->logType
);
1299 HttpRequest
*request
= http
->request
;
1300 #if DONT_FILTER_THESE
1301 /* but you might want to if you run Squid as an HTTP accelerator */
1302 /* hdr->delById(HDR_ACCEPT_RANGES); */
1303 hdr
->delById(HDR_ETAG
);
1307 hdr
->delById(HDR_SET_COOKIE
);
1308 // TODO: RFC 2965 : Must honour Cache-Control: no-cache="set-cookie2" and remove header.
1310 // if there is not configured a peer proxy with login=PASS or login=PASSTHRU option enabled
1311 // remove the Proxy-Authenticate header
1312 if ( !request
->peer_login
|| (strcmp(request
->peer_login
,"PASS") != 0 && strcmp(request
->peer_login
,"PASSTHRU") != 0))
1313 reply
->header
.delById(HDR_PROXY_AUTHENTICATE
);
1315 reply
->header
.removeHopByHopEntries();
1317 // if (request->range)
1318 // clientBuildRangeHeader(http, reply);
1321 * Add a estimated Age header on cache hits.
1325 * Remove any existing Age header sent by upstream caches
1326 * (note that the existing header is passed along unmodified
1329 hdr
->delById(HDR_AGE
);
1331 * This adds the calculated object age. Note that the details of the
1332 * age calculation is performed by adjusting the timestamp in
1333 * StoreEntry::timestampsSet(), not here.
1335 if (EBIT_TEST(http
->storeEntry()->flags
, ENTRY_SPECIAL
)) {
1336 hdr
->delById(HDR_DATE
);
1337 hdr
->insertTime(HDR_DATE
, squid_curtime
);
1338 } else if (http
->getConn() && http
->getConn()->port
->actAsOrigin
) {
1339 // Swap the Date: header to current time if we are simulating an origin
1340 HttpHeaderEntry
*h
= hdr
->findEntry(HDR_DATE
);
1342 hdr
->putExt("X-Origin-Date", h
->value
.termedBuf());
1343 hdr
->delById(HDR_DATE
);
1344 hdr
->insertTime(HDR_DATE
, squid_curtime
);
1345 h
= hdr
->findEntry(HDR_EXPIRES
);
1346 if (h
&& http
->storeEntry()->expires
>= 0) {
1347 hdr
->putExt("X-Origin-Expires", h
->value
.termedBuf());
1348 hdr
->delById(HDR_EXPIRES
);
1349 hdr
->insertTime(HDR_EXPIRES
, squid_curtime
+ http
->storeEntry()->expires
- http
->storeEntry()->timestamp
);
1351 if (http
->storeEntry()->timestamp
<= squid_curtime
) {
1352 // put X-Cache-Age: instead of Age:
1354 snprintf(age
, sizeof(age
), "%ld", (long int) squid_curtime
- http
->storeEntry()->timestamp
);
1355 hdr
->putExt("X-Cache-Age", age
);
1357 } else if (http
->storeEntry()->timestamp
<= squid_curtime
) {
1358 hdr
->putInt(HDR_AGE
,
1359 squid_curtime
- http
->storeEntry()->timestamp
);
1360 /* Signal old objects. NB: rfc 2616 is not clear,
1361 * by implication, on whether we should do this to all
1362 * responses, or only cache hits.
1363 * 14.46 states it ONLY applys for heuristically caclulated
1364 * freshness values, 13.2.4 doesn't specify the same limitation.
1365 * We interpret RFC 2616 under the combination.
1367 /* TODO: if maxage or s-maxage is present, don't do this */
1369 if (squid_curtime
- http
->storeEntry()->timestamp
>= 86400) {
1371 snprintf (tbuf
, sizeof(tbuf
), "%s %s %s",
1373 "This cache hit is still fresh and more than 1 day old");
1374 hdr
->putStr(HDR_WARNING
, tbuf
);
1379 /* RFC 2616: Section 14.18
1381 * Add a Date: header if missing.
1382 * We have access to a clock therefore are required to amend any shortcoming in servers.
1384 * NP: done after Age: to prevent ENTRY_SPECIAL double-handling this header.
1386 if ( !hdr
->has(HDR_DATE
) ) {
1387 if (!http
->storeEntry())
1388 hdr
->insertTime(HDR_DATE
, squid_curtime
);
1389 else if (http
->storeEntry()->timestamp
> 0)
1390 hdr
->insertTime(HDR_DATE
, http
->storeEntry()->timestamp
);
1392 debugs(88,DBG_IMPORTANT
,"BUG 3279: HTTP reply without Date:");
1393 /* dump something useful about the problem */
1394 http
->storeEntry()->dump(DBG_IMPORTANT
);
1398 // add Warnings required by RFC 2616 if serving a stale hit
1399 if (http
->request
->flags
.staleIfHit
&& logTypeIsATcpHit(http
->logType
)) {
1400 hdr
->putWarning(110, "Response is stale");
1401 if (http
->request
->flags
.needValidation
)
1402 hdr
->putWarning(111, "Revalidation failed");
1405 /* Filter unproxyable authentication types */
1406 if (http
->logType
!= LOG_TCP_DENIED
&&
1407 hdr
->has(HDR_WWW_AUTHENTICATE
)) {
1408 HttpHeaderPos pos
= HttpHeaderInitPos
;
1411 int connection_auth_blocked
= 0;
1412 while ((e
= hdr
->getEntry(&pos
))) {
1413 if (e
->id
== HDR_WWW_AUTHENTICATE
) {
1414 const char *value
= e
->value
.rawBuf();
1416 if ((strncasecmp(value
, "NTLM", 4) == 0 &&
1417 (value
[4] == '\0' || value
[4] == ' '))
1419 (strncasecmp(value
, "Negotiate", 9) == 0 &&
1420 (value
[9] == '\0' || value
[9] == ' '))
1422 (strncasecmp(value
, "Kerberos", 8) == 0 &&
1423 (value
[8] == '\0' || value
[8] == ' '))) {
1424 if (request
->flags
.connectionAuthDisabled
) {
1425 hdr
->delAt(pos
, connection_auth_blocked
);
1428 request
->flags
.mustKeepalive
= true;
1429 if (!request
->flags
.accelerated
&& !request
->flags
.intercepted
) {
1430 httpHeaderPutStrf(hdr
, HDR_PROXY_SUPPORT
, "Session-Based-Authentication");
1432 We send "[Proxy-]Connection: Proxy-Support" header to mark
1433 Proxy-Support as a hop-by-hop header for intermediaries that do not
1434 understand the semantics of this header. The RFC should have included
1435 this recommendation.
1437 httpHeaderPutStrf(hdr
, HDR_CONNECTION
, "Proxy-support");
1444 if (connection_auth_blocked
)
1449 /* Handle authentication headers */
1450 if (http
->logType
== LOG_TCP_DENIED
&&
1451 ( reply
->sline
.status() == Http::scProxyAuthenticationRequired
||
1452 reply
->sline
.status() == Http::scUnauthorized
)
1454 /* Add authentication header */
1455 /*! \todo alter errorstate to be accel on|off aware. The 0 on the next line
1456 * depends on authenticate behaviour: all schemes to date send no extra
1457 * data on 407/401 responses, and do not check the accel state on 401/407
1460 authenticateFixHeader(reply
, request
->auth_user_request
, request
, 0, 1);
1461 } else if (request
->auth_user_request
!= NULL
)
1462 authenticateFixHeader(reply
, request
->auth_user_request
, request
, http
->flags
.accel
, 0);
1465 /* Append X-Cache */
1466 httpHeaderPutStrf(hdr
, HDR_X_CACHE
, "%s from %s",
1467 is_hit
? "HIT" : "MISS", getMyHostname());
1469 #if USE_CACHE_DIGESTS
1470 /* Append X-Cache-Lookup: -- temporary hack, to be removed @?@ @?@ */
1471 httpHeaderPutStrf(hdr
, HDR_X_CACHE_LOOKUP
, "%s from %s:%d",
1472 lookup_type
? lookup_type
: "NONE",
1473 getMyHostname(), getMyPort());
1477 const bool maySendChunkedReply
= !request
->multipartRangeRequest() &&
1478 reply
->sline
.protocol
== AnyP::PROTO_HTTP
&& // response is HTTP
1479 (request
->http_ver
>= Http::ProtocolVersion(1, 1));
1481 /* Check whether we should send keep-alive */
1482 if (!Config
.onoff
.error_pconns
&& reply
->sline
.status() >= 400 && !request
->flags
.mustKeepalive
) {
1483 debugs(33, 3, "clientBuildReplyHeader: Error, don't keep-alive");
1484 request
->flags
.proxyKeepalive
= false;
1485 } else if (!Config
.onoff
.client_pconns
&& !request
->flags
.mustKeepalive
) {
1486 debugs(33, 2, "clientBuildReplyHeader: Connection Keep-Alive not requested by admin or client");
1487 request
->flags
.proxyKeepalive
= false;
1488 } else if (request
->flags
.proxyKeepalive
&& shutting_down
) {
1489 debugs(88, 3, "clientBuildReplyHeader: Shutting down, don't keep-alive.");
1490 request
->flags
.proxyKeepalive
= false;
1491 } else if (request
->flags
.connectionAuth
&& !reply
->keep_alive
) {
1492 debugs(33, 2, "clientBuildReplyHeader: Connection oriented auth but server side non-persistent");
1493 request
->flags
.proxyKeepalive
= false;
1494 } else if (reply
->bodySize(request
->method
) < 0 && !maySendChunkedReply
) {
1495 debugs(88, 3, "clientBuildReplyHeader: can't keep-alive, unknown body size" );
1496 request
->flags
.proxyKeepalive
= false;
1497 } else if (fdUsageHigh()&& !request
->flags
.mustKeepalive
) {
1498 debugs(88, 3, "clientBuildReplyHeader: Not many unused FDs, can't keep-alive");
1499 request
->flags
.proxyKeepalive
= false;
1500 } else if (request
->flags
.sslBumped
&& !reply
->persistent()) {
1501 // We do not really have to close, but we pretend we are a tunnel.
1502 debugs(88, 3, "clientBuildReplyHeader: bumped reply forces close");
1503 request
->flags
.proxyKeepalive
= false;
1504 } else if (request
->pinnedConnection() && !reply
->persistent()) {
1505 // The peer wants to close the pinned connection
1506 debugs(88, 3, "pinned reply forces close");
1507 request
->flags
.proxyKeepalive
= false;
1510 // Decide if we send chunked reply
1511 if (maySendChunkedReply
&&
1512 request
->flags
.proxyKeepalive
&&
1513 reply
->bodySize(request
->method
) < 0) {
1514 debugs(88, 3, "clientBuildReplyHeader: chunked reply");
1515 request
->flags
.chunkedReply
= true;
1516 hdr
->putStr(HDR_TRANSFER_ENCODING
, "chunked");
1520 if (Config
.onoff
.via
) {
1521 LOCAL_ARRAY(char, bbuf
, MAX_URL
+ 32);
1523 hdr
->getList(HDR_VIA
, &strVia
);
1524 snprintf(bbuf
, MAX_URL
+ 32, "%d.%d %s",
1525 reply
->sline
.version
.major
,
1526 reply
->sline
.version
.minor
,
1528 strListAdd(&strVia
, bbuf
, ',');
1529 hdr
->delById(HDR_VIA
);
1530 hdr
->putStr(HDR_VIA
, strVia
.termedBuf());
1532 /* Signal keep-alive or close explicitly */
1533 hdr
->putStr(HDR_CONNECTION
, request
->flags
.proxyKeepalive
? "keep-alive" : "close");
1535 #if ADD_X_REQUEST_URI
1537 * Knowing the URI of the request is useful when debugging persistent
1538 * connections in a client; we cannot guarantee the order of http headers,
1539 * but X-Request-URI is likely to be the very last header to ease use from a
1540 * debugger [hdr->entries.count-1].
1542 hdr
->putStr(HDR_X_REQUEST_URI
,
1543 http
->memOjbect()->url
? http
->memObject()->url
: http
->uri
);
1547 /* Surrogate-Control requires Surrogate-Capability from upstream to pass on */
1548 if ( hdr
->has(HDR_SURROGATE_CONTROL
) ) {
1549 if (!request
->header
.has(HDR_SURROGATE_CAPABILITY
)) {
1550 hdr
->delById(HDR_SURROGATE_CONTROL
);
1552 /* TODO: else case: drop any controls intended specifically for our surrogate ID */
1555 httpHdrMangleList(hdr
, request
, ROR_REPLY
);
1559 clientReplyContext::cloneReply()
1561 assert(reply
== NULL
);
1563 reply
= http
->storeEntry()->getReply()->clone();
1566 if (reply
->sline
.protocol
== AnyP::PROTO_HTTP
) {
1567 /* RFC 2616 requires us to advertise our 1.1 version (but only on real HTTP traffic) */
1568 reply
->sline
.version
= Http::ProtocolVersion(1,1);
1571 /* do header conversions */
1575 /// Safely disposes of an entry pointing to a cache hit that we do not want.
1576 /// We cannot just ignore the entry because it may be locking or otherwise
1577 /// holding an associated cache resource of some sort.
1579 clientReplyContext::forgetHit()
1581 StoreEntry
*e
= http
->storeEntry();
1582 assert(e
); // or we are not dealing with a hit
1583 // We probably have not locked the entry earlier, unfortunately. We lock it
1584 // now so that we can unlock two lines later (and trigger cleanup).
1585 // Ideally, ClientHttpRequest::storeEntry() should lock/unlock, but it is
1586 // used so inconsistently that simply adding locking there leads to bugs.
1587 e
->lock("clientReplyContext::forgetHit");
1588 http
->storeEntry(NULL
);
1589 e
->unlock("clientReplyContext::forgetHit"); // may delete e
1593 clientReplyContext::identifyStoreObject()
1595 HttpRequest
*r
= http
->request
;
1597 if (r
->flags
.cachable
|| r
->flags
.internal
) {
1598 lookingforstore
= 5;
1599 StoreEntry::getPublicByRequest (this, r
);
1601 identifyFoundObject (NullStoreEntry::getInstance());
1606 * Check state of the current StoreEntry object.
1607 * to see if we can determine the final status of the request.
1610 clientReplyContext::identifyFoundObject(StoreEntry
*newEntry
)
1612 StoreEntry
*e
= newEntry
;
1613 HttpRequest
*r
= http
->request
;
1615 /** \li If the entry received isNull() then we ignore it. */
1617 http
->storeEntry(NULL
);
1619 http
->storeEntry(e
);
1622 e
= http
->storeEntry();
1624 /* Release IP-cache entries on reload */
1625 /** \li If the request has no-cache flag set or some no_cache HACK in operation we
1626 * 'invalidate' the cached IP entries for this request ???
1628 if (r
->flags
.noCache
|| r
->flags
.noCacheHack())
1629 ipcacheInvalidateNegative(r
->GetHost());
1631 #if USE_CACHE_DIGESTS
1632 lookup_type
= http
->storeEntry() ? "HIT" : "MISS";
1635 if (NULL
== http
->storeEntry()) {
1636 /** \li If no StoreEntry object is current assume this object isn't in the cache set MISS*/
1637 debugs(85, 3, "StoreEntry is NULL - MISS");
1638 http
->logType
= LOG_TCP_MISS
;
1643 if (Config
.onoff
.offline
) {
1644 /** \li If we are running in offline mode set to HIT */
1645 debugs(85, 3, "offline HIT " << *e
);
1646 http
->logType
= LOG_TCP_HIT
;
1651 if (http
->redirect
.status
) {
1652 /** \li If redirection status is True force this to be a MISS */
1653 debugs(85, 3, "REDIRECT status forced StoreEntry to NULL (no body on 3XX responses) " << *e
);
1655 http
->logType
= LOG_TCP_REDIRECT
;
1660 if (!e
->validToSend()) {
1661 debugs(85, 3, "!storeEntryValidToSend MISS " << *e
);
1663 http
->logType
= LOG_TCP_MISS
;
1668 if (EBIT_TEST(e
->flags
, ENTRY_SPECIAL
)) {
1669 /* \li Special entries are always hits, no matter what the client says */
1670 debugs(85, 3, "ENTRY_SPECIAL HIT " << *e
);
1671 http
->logType
= LOG_TCP_HIT
;
1676 if (r
->flags
.noCache
) {
1677 debugs(85, 3, "no-cache REFRESH MISS " << *e
);
1679 http
->logType
= LOG_TCP_CLIENT_REFRESH_MISS
;
1684 debugs(85, 3, "default HIT " << *e
);
1685 http
->logType
= LOG_TCP_HIT
;
1690 * Request more data from the store for the client Stream
1691 * This is *the* entry point to this module.
1694 * - This is the head of the list.
1695 * - There is at least one more node.
1696 * - Data context is not null
1699 clientGetMoreData(clientStreamNode
* aNode
, ClientHttpRequest
* http
)
1701 /* Test preconditions */
1702 assert(aNode
!= NULL
);
1703 assert(cbdataReferenceValid(aNode
));
1704 assert(aNode
->node
.prev
== NULL
);
1705 assert(aNode
->node
.next
!= NULL
);
1706 clientReplyContext
*context
= dynamic_cast<clientReplyContext
*>(aNode
->data
.getRaw());
1708 assert(context
->http
== http
);
1710 clientStreamNode
*next
= ( clientStreamNode
*)aNode
->node
.next
->data
;
1712 if (!context
->ourNode
)
1713 context
->ourNode
= aNode
;
1715 /* no cbdatareference, this is only used once, and safely */
1716 if (context
->flags
.storelogiccomplete
) {
1717 StoreIOBuffer tempBuffer
;
1718 tempBuffer
.offset
= next
->readBuffer
.offset
+ context
->headers_sz
;
1719 tempBuffer
.length
= next
->readBuffer
.length
;
1720 tempBuffer
.data
= next
->readBuffer
.data
;
1722 storeClientCopy(context
->sc
, http
->storeEntry(),
1723 tempBuffer
, clientReplyContext::SendMoreData
, context
);
1727 if (context
->http
->request
->method
== Http::METHOD_PURGE
) {
1728 context
->purgeRequest();
1732 // OPTIONS with Max-Forwards:0 handled in clientProcessRequest()
1734 if (context
->http
->request
->method
== Http::METHOD_TRACE
) {
1735 if (context
->http
->request
->header
.getInt64(HDR_MAX_FORWARDS
) == 0) {
1736 context
->traceReply(aNode
);
1740 /* continue forwarding, not finished yet. */
1741 http
->logType
= LOG_TCP_MISS
;
1743 context
->doGetMoreData();
1745 context
->identifyStoreObject();
1749 clientReplyContext::doGetMoreData()
1751 /* We still have to do store logic processing - vary, cache hit etc */
1752 if (http
->storeEntry() != NULL
) {
1753 /* someone found the object in the cache for us */
1754 StoreIOBuffer localTempBuffer
;
1756 http
->storeEntry()->lock("clientReplyContext::doGetMoreData");
1758 MemObject
*mem_obj
= http
->storeEntry()->makeMemObject();
1759 if (!mem_obj
->hasUris()) {
1761 * This if-block exists because we don't want to clobber
1762 * a preexiting mem_obj->method value if the mem_obj
1763 * already exists. For example, when a HEAD request
1764 * is a cache hit for a GET response, we want to keep
1765 * the method as GET.
1767 mem_obj
->setUris(storeId(), http
->log_uri
, http
->request
->method
);
1769 * Here we can see if the object was
1770 * created using URL or alternative StoreID from helper.
1772 debugs(88, 3, "storeId: " << http
->storeEntry()->mem_obj
->storeId());
1775 sc
= storeClientListAdd(http
->storeEntry(), this);
1777 sc
->setDelayId(DelayId::DelayClient(http
));
1780 assert(http
->logType
== LOG_TCP_HIT
);
1782 /* guarantee nothing has been sent yet! */
1783 assert(http
->out
.size
== 0);
1784 assert(http
->out
.offset
== 0);
1786 if (Ip::Qos::TheConfig
.isHitTosActive()) {
1787 Ip::Qos::doTosLocalHit(http
->getConn()->clientConnection
);
1790 if (Ip::Qos::TheConfig
.isHitNfmarkActive()) {
1791 Ip::Qos::doNfmarkLocalHit(http
->getConn()->clientConnection
);
1794 localTempBuffer
.offset
= reqofs
;
1795 localTempBuffer
.length
= getNextNode()->readBuffer
.length
;
1796 localTempBuffer
.data
= getNextNode()->readBuffer
.data
;
1797 storeClientCopy(sc
, http
->storeEntry(), localTempBuffer
, CacheHit
, this);
1799 /* MISS CASE, http->logType is already set! */
1804 /** The next node has removed itself from the stream. */
1806 clientReplyDetach(clientStreamNode
* node
, ClientHttpRequest
* http
)
1808 /** detach from the stream */
1809 clientStreamDetach(node
, http
);
1813 * Accepts chunk of a http message in buf, parses prefix, filters headers and
1814 * such, writes processed message to the message recipient
1817 clientReplyContext::SendMoreData(void *data
, StoreIOBuffer result
)
1819 clientReplyContext
*context
= static_cast<clientReplyContext
*>(data
);
1820 context
->sendMoreData (result
);
1824 clientReplyContext::makeThisHead()
1826 /* At least, I think thats what this does */
1827 dlinkDelete(&http
->active
, &ClientActiveRequests
);
1828 dlinkAdd(http
, &http
->active
, &ClientActiveRequests
);
1832 clientReplyContext::errorInStream(StoreIOBuffer
const &result
, size_t const &sizeToProcess
)const
1834 return /* aborted request */
1835 (http
->storeEntry() && EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
)) ||
1836 /* Upstream read error */ (result
.flags
.error
) ||
1837 /* Upstream EOF */ (sizeToProcess
== 0);
1841 clientReplyContext::sendStreamError(StoreIOBuffer
const &result
)
1843 /** call clientWriteComplete so the client socket gets closed
1845 * We call into the stream, because we don't know that there is a
1848 debugs(88, 5, "clientReplyContext::sendStreamError: A stream error has occured, marking as complete and sending no data.");
1849 StoreIOBuffer localTempBuffer
;
1851 http
->request
->flags
.streamError
= true;
1852 localTempBuffer
.flags
.error
= result
.flags
.error
;
1853 clientStreamCallback((clientStreamNode
*)http
->client_stream
.head
->data
, http
, NULL
,
1858 clientReplyContext::pushStreamData(StoreIOBuffer
const &result
, char *source
)
1860 StoreIOBuffer localTempBuffer
;
1862 if (result
.length
== 0) {
1863 debugs(88, 5, "clientReplyContext::pushStreamData: marking request as complete due to 0 length store result");
1867 assert(result
.offset
- headers_sz
== next()->readBuffer
.offset
);
1868 localTempBuffer
.offset
= result
.offset
- headers_sz
;
1869 localTempBuffer
.length
= result
.length
;
1871 if (localTempBuffer
.length
)
1872 localTempBuffer
.data
= source
;
1874 clientStreamCallback((clientStreamNode
*)http
->client_stream
.head
->data
, http
, NULL
,
1879 clientReplyContext::next() const
1881 assert ( (clientStreamNode
*)http
->client_stream
.head
->next
->data
== getNextNode());
1882 return getNextNode();
1886 clientReplyContext::sendBodyTooLargeError()
1888 Ip::Address tmp_noaddr
;
1889 tmp_noaddr
.setNoAddr(); // TODO: make a global const
1890 http
->logType
= LOG_TCP_DENIED_REPLY
;
1891 ErrorState
*err
= clientBuildError(ERR_TOO_BIG
, Http::scForbidden
, NULL
,
1892 http
->getConn() != NULL
? http
->getConn()->clientConnection
->remote
: tmp_noaddr
,
1894 removeClientStoreReference(&(sc
), http
);
1895 HTTPMSGUNLOCK(reply
);
1900 /// send 412 (Precondition Failed) to client
1902 clientReplyContext::sendPreconditionFailedError()
1904 http
->logType
= LOG_TCP_HIT
;
1905 ErrorState
*const err
=
1906 clientBuildError(ERR_PRECONDITION_FAILED
, Http::scPreconditionFailed
,
1907 NULL
, http
->getConn()->clientConnection
->remote
, http
->request
);
1908 removeClientStoreReference(&sc
, http
);
1909 HTTPMSGUNLOCK(reply
);
1913 /// send 304 (Not Modified) to client
1915 clientReplyContext::sendNotModified()
1917 StoreEntry
*e
= http
->storeEntry();
1918 const time_t timestamp
= e
->timestamp
;
1919 HttpReply
*const temprep
= e
->getReply()->make304();
1920 http
->logType
= LOG_TCP_IMS_HIT
;
1921 removeClientStoreReference(&sc
, http
);
1922 createStoreEntry(http
->request
->method
, RequestFlags());
1923 e
= http
->storeEntry();
1924 // Copy timestamp from the original entry so the 304
1925 // reply has a meaningful Age: header.
1927 e
->timestamp
= timestamp
;
1928 e
->replaceHttpReply(temprep
);
1931 * TODO: why put this in the store and then serialise it and
1932 * then parse it again. Simply mark the request complete in
1933 * our context and write the reply struct to the client side.
1935 triggerInitialStoreRead();
1938 /// send 304 (Not Modified) or 412 (Precondition Failed) to client
1939 /// depending on request method
1941 clientReplyContext::sendNotModifiedOrPreconditionFailedError()
1943 if (http
->request
->method
== Http::METHOD_GET
||
1944 http
->request
->method
== Http::METHOD_HEAD
)
1947 sendPreconditionFailedError();
1951 clientReplyContext::processReplyAccess ()
1953 /* NP: this should probably soft-fail to a zero-sized-reply error ?? */
1956 /** Don't block our own responses or HTTP status messages */
1957 if (http
->logType
== LOG_TCP_DENIED
||
1958 http
->logType
== LOG_TCP_DENIED_REPLY
||
1959 alwaysAllowResponse(reply
->sline
.status())) {
1960 headers_sz
= reply
->hdr_sz
;
1961 processReplyAccessResult(ACCESS_ALLOWED
);
1965 /** Check for reply to big error */
1966 if (reply
->expectedBodyTooLarge(*http
->request
)) {
1967 sendBodyTooLargeError();
1971 headers_sz
= reply
->hdr_sz
;
1973 /** check for absent access controls (permit by default) */
1974 if (!Config
.accessList
.reply
) {
1975 processReplyAccessResult(ACCESS_ALLOWED
);
1979 /** Process http_reply_access lists */
1980 ACLFilledChecklist
*replyChecklist
=
1981 clientAclChecklistCreate(Config
.accessList
.reply
, http
);
1982 replyChecklist
->reply
= reply
;
1983 HTTPMSGLOCK(replyChecklist
->reply
);
1984 replyChecklist
->nonBlockingCheck(ProcessReplyAccessResult
, this);
1988 clientReplyContext::ProcessReplyAccessResult(allow_t rv
, void *voidMe
)
1990 clientReplyContext
*me
= static_cast<clientReplyContext
*>(voidMe
);
1991 me
->processReplyAccessResult(rv
);
1995 clientReplyContext::processReplyAccessResult(const allow_t
&accessAllowed
)
1997 debugs(88, 2, "The reply for " << http
->request
->method
1998 << ' ' << http
->uri
<< " is " << accessAllowed
<< ", because it matched "
1999 << (AclMatchedName
? AclMatchedName
: "NO ACL's"));
2001 if (accessAllowed
!= ACCESS_ALLOWED
) {
2004 page_id
= aclGetDenyInfoPage(&Config
.denyInfoList
, AclMatchedName
, 1);
2006 http
->logType
= LOG_TCP_DENIED_REPLY
;
2008 if (page_id
== ERR_NONE
)
2009 page_id
= ERR_ACCESS_DENIED
;
2011 Ip::Address tmp_noaddr
;
2012 tmp_noaddr
.setNoAddr();
2013 err
= clientBuildError(page_id
, Http::scForbidden
, NULL
,
2014 http
->getConn() != NULL
? http
->getConn()->clientConnection
->remote
: tmp_noaddr
,
2017 removeClientStoreReference(&sc
, http
);
2019 HTTPMSGUNLOCK(reply
);
2026 /* Ok, the reply is allowed, */
2027 http
->loggingEntry(http
->storeEntry());
2029 ssize_t body_size
= reqofs
- reply
->hdr_sz
;
2030 if (body_size
< 0) {
2031 reqofs
= reply
->hdr_sz
;
2035 debugs(88, 3, "clientReplyContext::sendMoreData: Appending " <<
2036 (int) body_size
<< " bytes after " << reply
->hdr_sz
<<
2037 " bytes of headers");
2041 if (http
->flags
.accel
&& reply
->sline
.status() != Http::scForbidden
&&
2042 !alwaysAllowResponse(reply
->sline
.status()) &&
2043 esiEnableProcessing(reply
)) {
2044 debugs(88, 2, "Enabling ESI processing for " << http
->uri
);
2045 clientStreamInsertHead(&http
->client_stream
, esiStreamRead
,
2046 esiProcessStream
, esiStreamDetach
, esiStreamStatus
, NULL
);
2051 if (http
->request
->method
== Http::METHOD_HEAD
) {
2052 /* do not forward body for HEAD replies */
2054 http
->flags
.done_copying
= true;
2058 assert (!flags
.headersSent
);
2059 flags
.headersSent
= true;
2061 StoreIOBuffer localTempBuffer
;
2062 char *buf
= next()->readBuffer
.data
;
2063 char *body_buf
= buf
+ reply
->hdr_sz
;
2065 //Server side may disable ranges under some circumstances.
2067 if ((!http
->request
->range
))
2068 next()->readBuffer
.offset
= 0;
2070 body_buf
-= next()->readBuffer
.offset
;
2072 if (next()->readBuffer
.offset
!= 0) {
2073 if (next()->readBuffer
.offset
> body_size
) {
2074 /* Can't use any of the body we received. send nothing */
2075 localTempBuffer
.length
= 0;
2076 localTempBuffer
.data
= NULL
;
2078 localTempBuffer
.length
= body_size
- next()->readBuffer
.offset
;
2079 localTempBuffer
.data
= body_buf
+ next()->readBuffer
.offset
;
2082 localTempBuffer
.length
= body_size
;
2083 localTempBuffer
.data
= body_buf
;
2086 /* TODO??: move the data in the buffer back by the request header size */
2087 clientStreamCallback((clientStreamNode
*)http
->client_stream
.head
->data
,
2088 http
, reply
, localTempBuffer
);
2094 clientReplyContext::sendMoreData (StoreIOBuffer result
)
2099 StoreEntry
*entry
= http
->storeEntry();
2101 ConnStateData
* conn
= http
->getConn();
2103 // too late, our conn is closing
2104 // TODO: should we also quit?
2106 debugs(33,3, "not sending more data to a closed connection" );
2109 if (!conn
->isOpen()) {
2110 debugs(33,3, "not sending more data to closing connection " << conn
->clientConnection
);
2113 if (conn
->pinning
.zeroReply
) {
2114 debugs(33,3, "not sending more data after a pinned zero reply " << conn
->clientConnection
);
2118 char *buf
= next()->readBuffer
.data
;
2120 if (buf
!= result
.data
) {
2121 /* we've got to copy some data */
2122 assert(result
.length
<= next()->readBuffer
.length
);
2123 memcpy(buf
, result
.data
, result
.length
);
2126 if (reqofs
==0 && !logTypeIsATcpHit(http
->logType
) && Comm::IsConnOpen(conn
->clientConnection
)) {
2127 if (Ip::Qos::TheConfig
.isHitTosActive()) {
2128 Ip::Qos::doTosLocalMiss(conn
->clientConnection
, http
->request
->hier
.code
);
2130 if (Ip::Qos::TheConfig
.isHitNfmarkActive()) {
2131 Ip::Qos::doNfmarkLocalMiss(conn
->clientConnection
, http
->request
->hier
.code
);
2135 /* We've got the final data to start pushing... */
2136 flags
.storelogiccomplete
= 1;
2138 reqofs
+= result
.length
;
2140 assert(reqofs
<= HTTP_REQBUF_SZ
|| flags
.headersSent
);
2142 assert(http
->request
!= NULL
);
2144 /* ESI TODO: remove this assert once everything is stable */
2145 assert(http
->client_stream
.head
->data
2146 && cbdataReferenceValid(http
->client_stream
.head
->data
));
2150 debugs(88, 5, "clientReplyContext::sendMoreData: " << http
->uri
<< ", " <<
2151 reqofs
<< " bytes (" << result
.length
<<
2153 debugs(88, 5, "clientReplyContext::sendMoreData:"
2154 << conn
->clientConnection
<<
2155 " '" << entry
->url() << "'" <<
2156 " out.offset=" << http
->out
.offset
);
2158 /* update size of the request */
2161 if (errorInStream(result
, reqofs
)) {
2162 sendStreamError(result
);
2166 if (flags
.headersSent
) {
2167 pushStreamData (result
, buf
);
2173 /* handle headers */
2175 if (Config
.onoff
.log_mime_hdrs
) {
2178 if ((k
= headersEnd(buf
, reqofs
))) {
2179 safe_free(http
->al
->headers
.reply
);
2180 http
->al
->headers
.reply
= (char *)xcalloc(k
+ 1, 1);
2181 xstrncpy(http
->al
->headers
.reply
, buf
, k
);
2185 holdingBuffer
= result
;
2186 processReplyAccess();
2190 /* Using this breaks the client layering just a little!
2193 clientReplyContext::createStoreEntry(const HttpRequestMethod
& m
, RequestFlags reqFlags
)
2195 assert(http
!= NULL
);
2197 * For erroneous requests, we might not have a h->request,
2198 * so make a fake one.
2201 if (http
->request
== NULL
) {
2202 http
->request
= new HttpRequest(m
, AnyP::PROTO_NONE
, null_string
);
2203 HTTPMSGLOCK(http
->request
);
2206 StoreEntry
*e
= storeCreateEntry(storeId(), http
->log_uri
, reqFlags
, m
);
2208 // Make entry collapsable ASAP, to increase collapsing chances for others,
2209 // TODO: every must-revalidate and similar request MUST reach the origin,
2210 // but do we have to prohibit others from collapsing on that request?
2211 if (Config
.onoff
.collapsed_forwarding
&& reqFlags
.cachable
&&
2212 !reqFlags
.needValidation
&&
2213 (m
== Http::METHOD_GET
|| m
== Http::METHOD_HEAD
)) {
2214 // make the entry available for future requests now
2215 Store::Root().allowCollapsing(e
, reqFlags
, m
);
2218 sc
= storeClientListAdd(e
, this);
2221 sc
->setDelayId(DelayId::DelayClient(http
));
2228 /* I don't think this is actually needed! -- adrian */
2229 /* http->reqbuf = http->norm_reqbuf; */
2230 // assert(http->reqbuf == http->norm_reqbuf);
2231 /* The next line is illegal because we don't know if the client stream
2232 * buffers have been set up
2234 // storeClientCopy(http->sc, e, 0, HTTP_REQBUF_SZ, http->reqbuf,
2235 // SendMoreData, this);
2236 /* So, we mark the store logic as complete */
2237 flags
.storelogiccomplete
= 1;
2239 /* and get the caller to request a read, from whereever they are */
2240 /* NOTE: after ANY data flows down the pipe, even one step,
2241 * this function CAN NOT be used to manage errors
2243 http
->storeEntry(e
);
2247 clientBuildError(err_type page_id
, Http::StatusCode status
, char const *url
,
2248 Ip::Address
&src_addr
, HttpRequest
* request
)
2250 ErrorState
*err
= new ErrorState(page_id
, status
, request
);
2251 err
->src_addr
= src_addr
;
2254 err
->url
= xstrdup(url
);