2 * Copyright (C) 1996-2015 The Squid Software Foundation and contributors
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
9 /* DEBUG: section 88 Client-side Reply Routines */
12 #include "acl/FilledChecklist.h"
13 #include "acl/Gadgets.h"
14 #include "anyp/PortCfg.h"
15 #include "client_side_reply.h"
16 #include "errorpage.h"
20 #include "format/Token.h"
24 #include "HttpHeaderTools.h"
25 #include "HttpReply.h"
26 #include "HttpRequest.h"
27 #include "ip/QosConfig.h"
29 #include "log/access_log.h"
30 #include "MemObject.h"
31 #include "mime_header.h"
32 #include "neighbors.h"
34 #include "RequestFlags.h"
35 #include "SquidConfig.h"
36 #include "SquidTime.h"
42 #include "auth/UserRequest.h"
45 #include "DelayPools.h"
53 CBDATA_CLASS_INIT(clientReplyContext
);
56 extern "C" CSS clientReplyStatus
;
57 ErrorState
*clientBuildError(err_type
, Http::StatusCode
, char const *, Ip::Address
&, HttpRequest
*);
61 clientReplyContext::~clientReplyContext()
64 /* This may trigger a callback back into SendMoreData as the cbdata
67 removeClientStoreReference(&sc
, http
);
68 /* old_entry might still be set if we didn't yet get the reply
69 * code in HandleIMSReply() */
70 removeStoreReference(&old_sc
, &old_entry
);
71 safe_free(tempBuffer
.data
);
72 cbdataReferenceDone(http
);
76 clientReplyContext::clientReplyContext(ClientHttpRequest
*clientContext
) :
77 purgeStatus(Http::scNone
),
79 http(cbdataReference(clientContext
)),
97 /** Create an error in the store awaiting the client side to read it.
99 * This may be better placed in the clientStream logic, but it has not been
100 * relocated there yet
103 clientReplyContext::setReplyToError(
104 err_type err
, Http::StatusCode status
, const HttpRequestMethod
& method
, char const *uri
,
105 Ip::Address
&addr
, HttpRequest
* failedrequest
, const char *unparsedrequest
,
107 Auth::UserRequest::Pointer auth_user_request
113 ErrorState
*errstate
= clientBuildError(err
, status
, uri
, addr
, failedrequest
);
116 errstate
->request_hdrs
= xstrdup(unparsedrequest
);
119 errstate
->auth_user_request
= auth_user_request
;
121 setReplyToError(method
, errstate
);
124 void clientReplyContext::setReplyToError(const HttpRequestMethod
& method
, ErrorState
*errstate
)
126 if (errstate
->httpStatus
== Http::scNotImplemented
&& http
->request
)
127 /* prevent confusion over whether we default to persistent or not */
128 http
->request
->flags
.proxyKeepalive
= false;
130 http
->al
->http
.code
= errstate
->httpStatus
;
133 http
->request
->ignoreRange("responding with a Squid-generated error");
135 createStoreEntry(method
, RequestFlags());
136 assert(errstate
->callback_data
== NULL
);
137 errorAppendEntry(http
->storeEntry(), errstate
);
138 /* Now the caller reads to get this */
142 clientReplyContext::setReplyToReply(HttpReply
*futureReply
)
145 http
->al
->http
.code
= futureReply
->sline
.status();
147 HttpRequestMethod method
;
148 if (http
->request
) { // nil on responses to unparsable requests
149 http
->request
->ignoreRange("responding with a Squid-generated reply");
150 method
= http
->request
->method
;
153 createStoreEntry(method
, RequestFlags());
155 http
->storeEntry()->storeErrorResponse(futureReply
);
156 /* Now the caller reads to get futureReply */
159 // Assumes that the entry contains an error response without Content-Range.
160 // To use with regular entries, make HTTP Range header removal conditional.
161 void clientReplyContext::setReplyToStoreEntry(StoreEntry
*entry
, const char *reason
)
163 entry
->lock("clientReplyContext::setReplyToStoreEntry"); // removeClientStoreReference() unlocks
164 sc
= storeClientListAdd(entry
, this);
166 sc
->setDelayId(DelayId::DelayClient(http
));
171 http
->request
->ignoreRange(reason
);
172 flags
.storelogiccomplete
= 1;
173 http
->storeEntry(entry
);
177 clientReplyContext::removeStoreReference(store_client
** scp
,
181 store_client
*sc_tmp
= *scp
;
183 if ((e
= *ep
) != NULL
) {
185 storeUnregister(sc_tmp
, e
, this);
187 e
->unlock("clientReplyContext::removeStoreReference");
192 clientReplyContext::removeClientStoreReference(store_client
**scp
, ClientHttpRequest
*aHttpRequest
)
194 StoreEntry
*reference
= aHttpRequest
->storeEntry();
195 removeStoreReference(scp
, &reference
);
196 aHttpRequest
->storeEntry(reference
);
200 clientReplyContext::saveState()
202 assert(old_sc
== NULL
);
203 debugs(88, 3, "clientReplyContext::saveState: saving store context");
204 old_entry
= http
->storeEntry();
206 old_reqsize
= reqsize
;
207 tempBuffer
.offset
= reqofs
;
208 /* Prevent accessing the now saved entries */
209 http
->storeEntry(NULL
);
216 clientReplyContext::restoreState()
218 assert(old_sc
!= NULL
);
219 debugs(88, 3, "clientReplyContext::restoreState: Restoring store context");
220 removeClientStoreReference(&sc
, http
);
221 http
->storeEntry(old_entry
);
223 reqsize
= old_reqsize
;
224 reqofs
= tempBuffer
.offset
;
225 /* Prevent accessed the old saved entries */
229 tempBuffer
.offset
= 0;
233 clientReplyContext::startError(ErrorState
* err
)
235 createStoreEntry(http
->request
->method
, RequestFlags());
236 triggerInitialStoreRead();
237 errorAppendEntry(http
->storeEntry(), err
);
241 clientReplyContext::getNextNode() const
243 return (clientStreamNode
*)ourNode
->node
.next
->data
;
246 /* This function is wrong - the client parameters don't include the
250 clientReplyContext::triggerInitialStoreRead()
252 /* when confident, 0 becomes reqofs, and then this factors into
256 StoreIOBuffer
localTempBuffer (next()->readBuffer
.length
, 0, next()->readBuffer
.data
);
257 storeClientCopy(sc
, http
->storeEntry(), localTempBuffer
, SendMoreData
, this);
260 /* there is an expired entry in the store.
261 * setup a temporary buffer area and perform an IMS to the origin
264 clientReplyContext::processExpired()
266 const char *url
= storeId();
267 StoreEntry
*entry
= NULL
;
268 debugs(88, 3, "clientReplyContext::processExpired: '" << http
->uri
<< "'");
269 assert(http
->storeEntry()->lastmod
>= 0);
271 * check if we are allowed to contact other servers
272 * @?@: Instead of a 504 (Gateway Timeout) reply, we may want to return
273 * a stale entry *if* it matches client requirements
276 if (http
->onlyIfCached()) {
277 processOnlyIfCachedMiss();
281 http
->request
->flags
.refresh
= true;
282 #if STORE_CLIENT_LIST_DEBUG
283 /* Prevent a race with the store client memory free routines
285 assert(storeClientIsThisAClient(sc
, this));
287 /* Prepare to make a new temporary request */
289 entry
= storeCreateEntry(url
,
290 http
->log_uri
, http
->request
->flags
, http
->request
->method
);
291 /* NOTE, don't call StoreEntry->lock(), storeCreateEntry() does it */
292 sc
= storeClientListAdd(entry
, this);
294 /* delay_id is already set on original store client */
295 sc
->setDelayId(DelayId::DelayClient(http
));
298 http
->request
->lastmod
= old_entry
->lastmod
;
300 if (!http
->request
->header
.has(HDR_IF_NONE_MATCH
)) {
301 ETag etag
= {NULL
, -1}; // TODO: make that a default ETag constructor
302 if (old_entry
->hasEtag(etag
) && !etag
.weak
)
303 http
->request
->etag
= etag
.str
;
306 debugs(88, 5, "clientReplyContext::processExpired : lastmod " << entry
->lastmod
);
307 http
->storeEntry(entry
);
308 assert(http
->out
.offset
== 0);
309 assert(http
->request
->clientConnectionManager
== http
->getConn());
312 * A refcounted pointer so that FwdState stays around as long as
313 * this clientReplyContext does
315 Comm::ConnectionPointer conn
= http
->getConn() != NULL
? http
->getConn()->clientConnection
: NULL
;
316 FwdState::Start(conn
, http
->storeEntry(), http
->request
, http
->al
);
318 /* Register with storage manager to receive updates when data comes in. */
320 if (EBIT_TEST(entry
->flags
, ENTRY_ABORTED
))
321 debugs(88, DBG_CRITICAL
, "clientReplyContext::processExpired: Found ENTRY_ABORTED object");
324 /* start counting the length from 0 */
325 StoreIOBuffer
localTempBuffer(HTTP_REQBUF_SZ
, 0, tempbuf
);
326 storeClientCopy(sc
, entry
, localTempBuffer
, HandleIMSReply
, this);
331 clientReplyContext::sendClientUpstreamResponse()
333 StoreIOBuffer tempresult
;
334 removeStoreReference(&old_sc
, &old_entry
);
335 /* here the data to send is the data we just received */
336 tempBuffer
.offset
= 0;
338 /* sendMoreData tracks the offset as well.
339 * Force it back to zero */
341 assert(!EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
));
342 /* TODO: provide sendMoreData with the ready parsed reply */
343 tempresult
.length
= reqsize
;
344 tempresult
.data
= tempbuf
;
345 sendMoreData(tempresult
);
349 clientReplyContext::HandleIMSReply(void *data
, StoreIOBuffer result
)
351 clientReplyContext
*context
= (clientReplyContext
*)data
;
352 context
->handleIMSReply(result
);
356 clientReplyContext::sendClientOldEntry()
358 /* Get the old request back */
360 /* here the data to send is in the next nodes buffers already */
361 assert(!EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
));
362 /* sendMoreData tracks the offset as well.
363 * Force it back to zero */
365 StoreIOBuffer
tempresult (reqsize
, reqofs
, next()->readBuffer
.data
);
366 sendMoreData(tempresult
);
369 /* This is the workhorse of the HandleIMSReply callback.
371 * It is called when we've got data back from the origin following our
372 * IMS request to revalidate a stale entry.
375 clientReplyContext::handleIMSReply(StoreIOBuffer result
)
380 debugs(88, 3, "handleIMSReply: " << http
->storeEntry()->url() << ", " << (long unsigned) result
.length
<< " bytes" );
382 if (http
->storeEntry() == NULL
)
385 if (result
.flags
.error
&& !EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
))
388 /* update size of the request */
389 reqsize
= result
.length
+ reqofs
;
391 const Http::StatusCode status
= http
->storeEntry()->getReply()->sline
.status();
393 // request to origin was aborted
394 if (EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
)) {
395 debugs(88, 3, "handleIMSReply: request to origin aborted '" << http
->storeEntry()->url() << "', sending old entry to client" );
396 http
->logType
= LOG_TCP_REFRESH_FAIL_OLD
;
397 sendClientOldEntry();
400 HttpReply
*old_rep
= (HttpReply
*) old_entry
->getReply();
402 // origin replied 304
403 if (status
== Http::scNotModified
) {
404 http
->logType
= LOG_TCP_REFRESH_UNMODIFIED
;
405 http
->request
->flags
.staleIfHit
= false; // old_entry is no longer stale
407 // update headers on existing entry
408 old_rep
->updateOnNotModified(http
->storeEntry()->getReply());
409 old_entry
->timestampsSet();
411 // if client sent IMS
413 if (http
->request
->flags
.ims
&& !old_entry
->modifiedSince(http
->request
)) {
414 // forward the 304 from origin
415 debugs(88, 3, "handleIMSReply: origin replied 304, revalidating existing entry and forwarding 304 to client");
416 sendClientUpstreamResponse();
418 // send existing entry, it's still valid
419 debugs(88, 3, "handleIMSReply: origin replied 304, revalidating existing entry and sending " <<
420 old_rep
->sline
.status() << " to client");
421 sendClientOldEntry();
425 // origin replied with a non-error code
426 else if (status
> Http::scNone
&& status
< Http::scInternalServerError
) {
427 // forward response from origin
428 http
->logType
= LOG_TCP_REFRESH_MODIFIED
;
429 debugs(88, 3, "handleIMSReply: origin replied " << status
<< ", replacing existing entry and forwarding to client");
430 sendClientUpstreamResponse();
433 // origin replied with an error
434 else if (http
->request
->flags
.failOnValidationError
) {
435 http
->logType
= LOG_TCP_REFRESH_FAIL_ERR
;
436 debugs(88, 3, "handleIMSReply: origin replied with error " << status
<<
437 ", forwarding to client due to fail_on_validation_err");
438 sendClientUpstreamResponse();
440 // ignore and let client have old entry
441 http
->logType
= LOG_TCP_REFRESH_FAIL_OLD
;
442 debugs(88, 3, "handleIMSReply: origin replied with error " <<
443 status
<< ", sending old entry (" << old_rep
->sline
.status() << ") to client");
444 sendClientOldEntry();
448 SQUIDCEXTERN CSR clientGetMoreData
;
449 SQUIDCEXTERN CSD clientReplyDetach
;
452 * clientReplyContext::cacheHit Should only be called until the HTTP reply headers
453 * have been parsed. Normally this should be a single call, but
454 * it might take more than one. As soon as we have the headers,
455 * we hand off to clientSendMoreData, processExpired, or
459 clientReplyContext::CacheHit(void *data
, StoreIOBuffer result
)
461 clientReplyContext
*context
= (clientReplyContext
*)data
;
462 context
->cacheHit(result
);
466 * Process a possible cache HIT.
469 clientReplyContext::cacheHit(StoreIOBuffer result
)
471 /** Ignore if the HIT object is being deleted. */
473 debugs(88, 3, "HIT object being deleted. Ignore the HIT.");
477 StoreEntry
*e
= http
->storeEntry();
479 HttpRequest
*r
= http
->request
;
481 debugs(88, 3, "clientCacheHit: " << http
->uri
<< ", " << result
.length
<< " bytes");
483 if (http
->storeEntry() == NULL
) {
484 debugs(88, 3, "clientCacheHit: request aborted");
486 } else if (result
.flags
.error
) {
487 /* swap in failure */
488 debugs(88, 3, "clientCacheHit: swapin failure for " << http
->uri
);
489 http
->logType
= LOG_TCP_SWAPFAIL_MISS
;
490 removeClientStoreReference(&sc
, http
);
495 if (result
.length
== 0) {
496 debugs(88, 5, "store IO buffer has no content. MISS");
497 /* the store couldn't get enough data from the file for us to id the
500 /* treat as a miss */
501 http
->logType
= LOG_TCP_MISS
;
506 assert(!EBIT_TEST(e
->flags
, ENTRY_ABORTED
));
507 /* update size of the request */
508 reqsize
= result
.length
+ reqofs
;
511 * Got the headers, now grok them
513 assert(http
->logType
== LOG_TCP_HIT
);
515 if (strcmp(e
->mem_obj
->storeId(), http
->request
->storeId()) != 0) {
516 debugs(33, DBG_IMPORTANT
, "clientProcessHit: URL mismatch, '" << e
->mem_obj
->storeId() << "' != '" << http
->request
->storeId() << "'");
517 http
->logType
= LOG_TCP_MISS
; // we lack a more precise LOG_*_MISS code
522 switch (varyEvaluateMatch(e
, r
)) {
525 /* No variance detected. Continue as normal */
529 /* This is the correct entity for this request. Continue */
530 debugs(88, 2, "clientProcessHit: Vary MATCH!");
534 /* This is not the correct entity for this request. We need
535 * to requery the cache.
537 removeClientStoreReference(&sc
, http
);
539 /* Note: varyEvalyateMatch updates the request with vary information
540 * so we only get here once. (it also takes care of cancelling loops)
542 debugs(88, 2, "clientProcessHit: Vary detected!");
543 clientGetMoreData(ourNode
, http
);
547 /* varyEvaluateMatch found a object loop. Process as miss */
548 debugs(88, DBG_IMPORTANT
, "clientProcessHit: Vary object loop!");
549 http
->logType
= LOG_TCP_MISS
; // we lack a more precise LOG_*_MISS code
554 if (r
->method
== Http::METHOD_PURGE
) {
555 debugs(88, 5, "PURGE gets a HIT");
556 removeClientStoreReference(&sc
, http
);
562 if (e
->checkNegativeHit() && !r
->flags
.noCacheHack()) {
563 debugs(88, 5, "negative-HIT");
564 http
->logType
= LOG_TCP_NEGATIVE_HIT
;
565 sendMoreData(result
);
566 } else if (blockedHit()) {
567 debugs(88, 5, "send_hit forces a MISS");
568 http
->logType
= LOG_TCP_MISS
;
571 } else if (!http
->flags
.internal
&& refreshCheckHTTP(e
, r
)) {
572 debugs(88, 5, "clientCacheHit: in refreshCheck() block");
574 * We hold a stale copy; it needs to be validated
577 * The 'needValidation' flag is used to prevent forwarding
578 * loops between siblings. If our copy of the object is stale,
579 * then we should probably only use parents for the validation
580 * request. Otherwise two siblings could generate a loop if
581 * both have a stale version of the object.
583 r
->flags
.needValidation
= true;
585 if (e
->lastmod
< 0) {
586 debugs(88, 3, "validate HIT object? NO. Missing Last-Modified header. Do MISS.");
588 * Previous reply didn't have a Last-Modified header,
589 * we cannot revalidate it.
591 http
->logType
= LOG_TCP_MISS
;
593 } else if (r
->flags
.noCache
) {
594 debugs(88, 3, "validate HIT object? NO. Client sent CC:no-cache. Do CLIENT_REFRESH_MISS");
596 * This did not match a refresh pattern that overrides no-cache
597 * we should honour the client no-cache header.
599 http
->logType
= LOG_TCP_CLIENT_REFRESH_MISS
;
601 } else if (r
->url
.getScheme() == AnyP::PROTO_HTTP
) {
602 debugs(88, 3, "validate HIT object? YES.");
604 * Object needs to be revalidated
605 * XXX This could apply to FTP as well, if Last-Modified is known.
609 debugs(88, 3, "validate HIT object? NO. Client protocol non-HTTP. Do MISS.");
611 * We don't know how to re-validate other protocols. Handle
612 * them as if the object has expired.
614 http
->logType
= LOG_TCP_MISS
;
617 } else if (r
->conditional()) {
618 debugs(88, 5, "conditional HIT");
619 processConditional(result
);
622 * plain ol' cache hit
624 debugs(88, 5, "plain old HIT");
627 if (e
->store_status
!= STORE_OK
)
628 http
->logType
= LOG_TCP_MISS
;
631 if (e
->mem_status
== IN_MEMORY
)
632 http
->logType
= LOG_TCP_MEM_HIT
;
633 else if (Config
.onoff
.offline
)
634 http
->logType
= LOG_TCP_OFFLINE_HIT
;
636 sendMoreData(result
);
641 * Prepare to fetch the object as it's a cache miss of some kind.
644 clientReplyContext::processMiss()
646 char *url
= http
->uri
;
647 HttpRequest
*r
= http
->request
;
648 ErrorState
*err
= NULL
;
649 debugs(88, 4, r
->method
<< ' ' << url
);
652 * We might have a left-over StoreEntry from a failed cache hit
655 if (http
->storeEntry()) {
656 if (EBIT_TEST(http
->storeEntry()->flags
, ENTRY_SPECIAL
)) {
657 debugs(88, DBG_CRITICAL
, "clientProcessMiss: miss on a special object (" << url
<< ").");
658 debugs(88, DBG_CRITICAL
, "\tlog_type = " << LogTags_str
[http
->logType
]);
659 http
->storeEntry()->dump(1);
662 removeClientStoreReference(&sc
, http
);
665 /** Check if its a PURGE request to be actioned. */
666 if (r
->method
== Http::METHOD_PURGE
) {
671 /** Check if its an 'OTHER' request. Purge all cached entries if so and continue. */
672 if (r
->method
== Http::METHOD_OTHER
) {
676 /** Check if 'only-if-cached' flag is set. Action if so. */
677 if (http
->onlyIfCached()) {
678 processOnlyIfCachedMiss();
683 if (r
->flags
.loopDetected
) {
684 http
->al
->http
.code
= Http::scForbidden
;
685 err
= clientBuildError(ERR_ACCESS_DENIED
, Http::scForbidden
, NULL
, http
->getConn()->clientConnection
->remote
, http
->request
);
686 createStoreEntry(r
->method
, RequestFlags());
687 errorAppendEntry(http
->storeEntry(), err
);
688 triggerInitialStoreRead();
691 assert(http
->out
.offset
== 0);
692 createStoreEntry(r
->method
, r
->flags
);
693 triggerInitialStoreRead();
695 if (http
->redirect
.status
) {
696 HttpReply
*rep
= new HttpReply
;
697 http
->logType
= LOG_TCP_REDIRECT
;
698 http
->storeEntry()->releaseRequest();
699 rep
->redirect(http
->redirect
.status
, http
->redirect
.location
);
700 http
->storeEntry()->replaceHttpReply(rep
);
701 http
->storeEntry()->complete();
705 assert(r
->clientConnectionManager
== http
->getConn());
707 /** Start forwarding to get the new object from network */
708 Comm::ConnectionPointer conn
= http
->getConn() != NULL
? http
->getConn()->clientConnection
: NULL
;
709 FwdState::Start(conn
, http
->storeEntry(), r
, http
->al
);
714 * client issued a request with an only-if-cached cache-control directive;
715 * we did not find a cached object that can be returned without
716 * contacting other servers;
717 * respond with a 504 (Gateway Timeout) as suggested in [RFC 2068]
720 clientReplyContext::processOnlyIfCachedMiss()
722 debugs(88, 4, http
->request
->method
<< ' ' << http
->uri
);
723 http
->al
->http
.code
= Http::scGatewayTimeout
;
724 ErrorState
*err
= clientBuildError(ERR_ONLY_IF_CACHED_MISS
, Http::scGatewayTimeout
, NULL
,
725 http
->getConn()->clientConnection
->remote
, http
->request
);
726 removeClientStoreReference(&sc
, http
);
730 /// process conditional request from client
732 clientReplyContext::processConditional(StoreIOBuffer
&result
)
734 StoreEntry
*const e
= http
->storeEntry();
736 if (e
->getReply()->sline
.status() != Http::scOkay
) {
737 debugs(88, 4, "clientReplyContext::processConditional: Reply code " <<
738 e
->getReply()->sline
.status() << " != 200");
739 http
->logType
= LOG_TCP_MISS
;
744 HttpRequest
&r
= *http
->request
;
746 if (r
.header
.has(HDR_IF_MATCH
) && !e
->hasIfMatchEtag(r
)) {
747 // RFC 2616: reply with 412 Precondition Failed if If-Match did not match
748 sendPreconditionFailedError();
752 bool matchedIfNoneMatch
= false;
753 if (r
.header
.has(HDR_IF_NONE_MATCH
)) {
754 if (!e
->hasIfNoneMatchEtag(r
)) {
755 // RFC 2616: ignore IMS if If-None-Match did not match
759 r
.header
.delById(HDR_IF_MODIFIED_SINCE
);
760 http
->logType
= LOG_TCP_MISS
;
761 sendMoreData(result
);
766 // RFC 2616: if If-None-Match matched and there is no IMS,
767 // reply with 304 Not Modified or 412 Precondition Failed
768 sendNotModifiedOrPreconditionFailedError();
772 // otherwise check IMS below to decide if we reply with 304 or 412
773 matchedIfNoneMatch
= true;
777 // handle If-Modified-Since requests from the client
778 if (e
->modifiedSince(&r
)) {
779 http
->logType
= LOG_TCP_IMS_HIT
;
780 sendMoreData(result
);
784 if (matchedIfNoneMatch
) {
785 // If-None-Match matched, reply with 304 Not Modified or
786 // 412 Precondition Failed
787 sendNotModifiedOrPreconditionFailedError();
791 // otherwise reply with 304 Not Modified
796 /// whether squid.conf send_hit prevents us from serving this hit
798 clientReplyContext::blockedHit() const
800 if (!Config
.accessList
.sendHit
)
801 return false; // hits are not blocked by default
803 if (http
->flags
.internal
)
804 return false; // internal content "hits" cannot be blocked
806 if (const HttpReply
*rep
= http
->storeEntry()->getReply()) {
807 std::unique_ptr
<ACLFilledChecklist
> chl(clientAclChecklistCreate(Config
.accessList
.sendHit
, http
));
808 chl
->reply
= const_cast<HttpReply
*>(rep
); // ACLChecklist API bug
809 HTTPMSGLOCK(chl
->reply
);
810 return chl
->fastCheck() != ACCESS_ALLOWED
; // when in doubt, block
813 // This does not happen, I hope, because we are called from CacheHit, which
814 // is called via a storeClientCopy() callback, and store should initialize
815 // the reply before calling that callback.
816 debugs(88, 3, "Missing reply!");
821 clientReplyContext::purgeRequestFindObjectToPurge()
823 /* Try to find a base entry */
824 http
->flags
.purging
= true;
827 // TODO: can we use purgeAllCached() here instead of doing the
828 // getPublicByRequestMethod() dance?
829 StoreEntry::getPublicByRequestMethod(this, http
->request
, Http::METHOD_GET
);
832 // Purges all entries with a given url
833 // TODO: move to SideAgent parent, when we have one
835 * We probably cannot purge Vary-affected responses because their MD5
836 * keys depend on vary headers.
839 purgeEntriesByUrl(HttpRequest
* req
, const char *url
)
842 bool get_or_head_sent
= false;
845 for (HttpRequestMethod
m(Http::METHOD_NONE
); m
!= Http::METHOD_ENUM_END
; ++m
) {
846 if (m
.respMaybeCacheable()) {
847 if (StoreEntry
*entry
= storeGetPublic(url
, m
)) {
848 debugs(88, 5, "purging " << *entry
<< ' ' << m
<< ' ' << url
);
850 neighborsHtcpClear(entry
, url
, req
, m
, HTCP_CLR_INVALIDATION
);
851 if (m
== Http::METHOD_GET
|| m
== Http::METHOD_HEAD
) {
852 get_or_head_sent
= true;
861 if (!get_or_head_sent
) {
862 neighborsHtcpClear(NULL
, url
, req
, HttpRequestMethod(Http::METHOD_GET
), HTCP_CLR_INVALIDATION
);
868 clientReplyContext::purgeAllCached()
870 const char *url
= urlCanonical(http
->request
);
871 purgeEntriesByUrl(http
->request
, url
);
875 clientReplyContext::created(StoreEntry
*newEntry
)
877 if (lookingforstore
== 1)
878 purgeFoundGet(newEntry
);
879 else if (lookingforstore
== 2)
880 purgeFoundHead(newEntry
);
881 else if (lookingforstore
== 3)
882 purgeDoPurgeGet(newEntry
);
883 else if (lookingforstore
== 4)
884 purgeDoPurgeHead(newEntry
);
885 else if (lookingforstore
== 5)
886 identifyFoundObject(newEntry
);
890 clientReplyContext::purgeFoundGet(StoreEntry
*newEntry
)
892 if (newEntry
->isNull()) {
894 StoreEntry::getPublicByRequestMethod(this, http
->request
, Http::METHOD_HEAD
);
896 purgeFoundObject (newEntry
);
900 clientReplyContext::purgeFoundHead(StoreEntry
*newEntry
)
902 if (newEntry
->isNull())
905 purgeFoundObject (newEntry
);
909 clientReplyContext::purgeFoundObject(StoreEntry
*entry
)
911 assert (entry
&& !entry
->isNull());
913 if (EBIT_TEST(entry
->flags
, ENTRY_SPECIAL
)) {
914 http
->logType
= LOG_TCP_DENIED
;
915 ErrorState
*err
= clientBuildError(ERR_ACCESS_DENIED
, Http::scForbidden
, NULL
,
916 http
->getConn()->clientConnection
->remote
, http
->request
);
918 return; // XXX: leaking unused entry if some store does not keep it
921 StoreIOBuffer localTempBuffer
;
922 /* Swap in the metadata */
923 http
->storeEntry(entry
);
925 http
->storeEntry()->lock("clientReplyContext::purgeFoundObject");
926 http
->storeEntry()->createMemObject(storeId(), http
->log_uri
,
927 http
->request
->method
);
929 sc
= storeClientListAdd(http
->storeEntry(), this);
931 http
->logType
= LOG_TCP_HIT
;
935 localTempBuffer
.offset
= http
->out
.offset
;
937 localTempBuffer
.length
= next()->readBuffer
.length
;
939 localTempBuffer
.data
= next()->readBuffer
.data
;
941 storeClientCopy(sc
, http
->storeEntry(),
942 localTempBuffer
, CacheHit
, this);
946 clientReplyContext::purgeRequest()
948 debugs(88, 3, "Config2.onoff.enable_purge = " <<
949 Config2
.onoff
.enable_purge
);
951 if (!Config2
.onoff
.enable_purge
) {
952 http
->logType
= LOG_TCP_DENIED
;
953 ErrorState
*err
= clientBuildError(ERR_ACCESS_DENIED
, Http::scForbidden
, NULL
, http
->getConn()->clientConnection
->remote
, http
->request
);
958 /* Release both IP cache */
959 ipcacheInvalidate(http
->request
->GetHost());
961 if (!http
->flags
.purging
)
962 purgeRequestFindObjectToPurge();
968 clientReplyContext::purgeDoMissPurge()
970 http
->logType
= LOG_TCP_MISS
;
972 StoreEntry::getPublicByRequestMethod(this,http
->request
, Http::METHOD_GET
);
976 clientReplyContext::purgeDoPurgeGet(StoreEntry
*newEntry
)
979 /* Move to new() when that is created */
980 purgeStatus
= Http::scNotFound
;
982 if (!newEntry
->isNull()) {
983 /* Release the cached URI */
984 debugs(88, 4, "clientPurgeRequest: GET '" << newEntry
->url() << "'" );
986 neighborsHtcpClear(newEntry
, NULL
, http
->request
, HttpRequestMethod(Http::METHOD_GET
), HTCP_CLR_PURGE
);
989 purgeStatus
= Http::scOkay
;
993 StoreEntry::getPublicByRequestMethod(this, http
->request
, Http::METHOD_HEAD
);
997 clientReplyContext::purgeDoPurgeHead(StoreEntry
*newEntry
)
999 if (newEntry
&& !newEntry
->isNull()) {
1000 debugs(88, 4, "clientPurgeRequest: HEAD '" << newEntry
->url() << "'" );
1002 neighborsHtcpClear(newEntry
, NULL
, http
->request
, HttpRequestMethod(Http::METHOD_HEAD
), HTCP_CLR_PURGE
);
1004 newEntry
->release();
1005 purgeStatus
= Http::scOkay
;
1008 /* And for Vary, release the base URI if none of the headers was included in the request */
1010 if (http
->request
->vary_headers
1011 && !strstr(http
->request
->vary_headers
, "=")) {
1012 StoreEntry
*entry
= storeGetPublic(urlCanonical(http
->request
), Http::METHOD_GET
);
1015 debugs(88, 4, "clientPurgeRequest: Vary GET '" << entry
->url() << "'" );
1017 neighborsHtcpClear(entry
, NULL
, http
->request
, HttpRequestMethod(Http::METHOD_GET
), HTCP_CLR_PURGE
);
1020 purgeStatus
= Http::scOkay
;
1023 entry
= storeGetPublic(urlCanonical(http
->request
), Http::METHOD_HEAD
);
1026 debugs(88, 4, "clientPurgeRequest: Vary HEAD '" << entry
->url() << "'" );
1028 neighborsHtcpClear(entry
, NULL
, http
->request
, HttpRequestMethod(Http::METHOD_HEAD
), HTCP_CLR_PURGE
);
1031 purgeStatus
= Http::scOkay
;
1036 * Make a new entry to hold the reply to be written
1039 /* FIXME: This doesn't need to go through the store. Simply
1040 * push down the client chain
1042 createStoreEntry(http
->request
->method
, RequestFlags());
1044 triggerInitialStoreRead();
1046 HttpReply
*rep
= new HttpReply
;
1047 rep
->setHeaders(purgeStatus
, NULL
, NULL
, 0, 0, -1);
1048 http
->storeEntry()->replaceHttpReply(rep
);
1049 http
->storeEntry()->complete();
1053 clientReplyContext::traceReply(clientStreamNode
* node
)
1055 clientStreamNode
*nextNode
= (clientStreamNode
*)node
->node
.next
->data
;
1056 StoreIOBuffer localTempBuffer
;
1057 createStoreEntry(http
->request
->method
, RequestFlags());
1058 localTempBuffer
.offset
= nextNode
->readBuffer
.offset
+ headers_sz
;
1059 localTempBuffer
.length
= nextNode
->readBuffer
.length
;
1060 localTempBuffer
.data
= nextNode
->readBuffer
.data
;
1061 storeClientCopy(sc
, http
->storeEntry(),
1062 localTempBuffer
, SendMoreData
, this);
1063 http
->storeEntry()->releaseRequest();
1064 http
->storeEntry()->buffer();
1065 HttpReply
*rep
= new HttpReply
;
1066 rep
->setHeaders(Http::scOkay
, NULL
, "text/plain", http
->request
->prefixLen(), 0, squid_curtime
);
1067 http
->storeEntry()->replaceHttpReply(rep
);
1068 http
->request
->swapOut(http
->storeEntry());
1069 http
->storeEntry()->complete();
1072 #define SENDING_BODY 0
1073 #define SENDING_HDRSONLY 1
1075 clientReplyContext::checkTransferDone()
1077 StoreEntry
*entry
= http
->storeEntry();
1083 * For now, 'done_copying' is used for special cases like
1084 * Range and HEAD requests.
1086 if (http
->flags
.done_copying
)
1089 if (http
->request
->flags
.chunkedReply
&& !flags
.complete
) {
1090 // last-chunk was not sent
1095 * Handle STORE_OK objects.
1096 * objectLen(entry) will be set proprely.
1097 * RC: Does objectLen(entry) include the Headers?
1100 if (entry
->store_status
== STORE_OK
) {
1101 return storeOKTransferDone();
1103 return storeNotOKTransferDone();
1108 clientReplyContext::storeOKTransferDone() const
1110 assert(http
->storeEntry()->objectLen() >= 0);
1111 assert(http
->storeEntry()->objectLen() >= headers_sz
);
1112 if (http
->out
.offset
>= http
->storeEntry()->objectLen() - headers_sz
) {
1113 debugs(88,3,HERE
<< "storeOKTransferDone " <<
1114 " out.offset=" << http
->out
.offset
<<
1115 " objectLen()=" << http
->storeEntry()->objectLen() <<
1116 " headers_sz=" << headers_sz
);
1124 clientReplyContext::storeNotOKTransferDone() const
1127 * Now, handle STORE_PENDING objects
1129 MemObject
*mem
= http
->storeEntry()->mem_obj
;
1130 assert(mem
!= NULL
);
1131 assert(http
->request
!= NULL
);
1132 /* mem->reply was wrong because it uses the UPSTREAM header length!!! */
1133 HttpReply
const *curReply
= mem
->getReply();
1135 if (headers_sz
== 0)
1136 /* haven't found end of headers yet */
1140 * Figure out how much data we are supposed to send.
1141 * If we are sending a body and we don't have a content-length,
1142 * then we must wait for the object to become STORE_OK.
1144 if (curReply
->content_length
< 0)
1147 int64_t expectedLength
= curReply
->content_length
+ http
->out
.headers_sz
;
1149 if (http
->out
.size
< expectedLength
)
1152 debugs(88,3,HERE
<< "storeNotOKTransferDone " <<
1153 " out.size=" << http
->out
.size
<<
1154 " expectedLength=" << expectedLength
);
1159 /* A write has completed, what is the next status based on the
1160 * canonical request data?
1161 * 1 something is wrong
1162 * 0 nothing is wrong.
1166 clientHttpRequestStatus(int fd
, ClientHttpRequest
const *http
)
1168 #if SIZEOF_INT64_T == 4
1169 if (http
->out
.size
> 0x7FFF0000) {
1170 debugs(88, DBG_IMPORTANT
, "WARNING: closing FD " << fd
<< " to prevent out.size counter overflow");
1171 debugs(88, DBG_IMPORTANT
, "\tclient " << http
->getConn()->peer
);
1172 debugs(88, DBG_IMPORTANT
, "\treceived " << http
->out
.size
<< " bytes");
1173 debugs(88, DBG_IMPORTANT
, "\tURI " << http
->log_uri
);
1177 if (http
->out
.offset
> 0x7FFF0000) {
1178 debugs(88, DBG_IMPORTANT
, "WARNING: closing FD " << fd
< " to prevent out.offset counter overflow");
1179 debugs(88, DBG_IMPORTANT
, "\tclient " << http
->getConn()->peer
);
1180 debugs(88, DBG_IMPORTANT
, "\treceived " << http
->out
.size
<< " bytes, offset " << http
->out
.offset
);
1181 debugs(88, DBG_IMPORTANT
, "\tURI " << http
->log_uri
);
1190 * *http is a valid structure.
1191 * fd is either -1, or an open fd.
1193 * TODO: enumify this
1195 * This function is used by any http request sink, to determine the status
1198 clientStream_status_t
1199 clientReplyStatus(clientStreamNode
* aNode
, ClientHttpRequest
* http
)
1201 clientReplyContext
*context
= dynamic_cast<clientReplyContext
*>(aNode
->data
.getRaw());
1203 assert (context
->http
== http
);
1204 return context
->replyStatus();
1207 clientStream_status_t
1208 clientReplyContext::replyStatus()
1211 /* Here because lower nodes don't need it */
1213 if (http
->storeEntry() == NULL
) {
1214 debugs(88, 5, "clientReplyStatus: no storeEntry");
1215 return STREAM_FAILED
; /* yuck, but what can we do? */
1218 if (EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
)) {
1219 /* TODO: Could upstream read errors (result.flags.error) be
1220 * lost, and result in undersize requests being considered
1221 * complete. Should we tcp reset such connections ?
1223 debugs(88, 5, "clientReplyStatus: aborted storeEntry");
1224 return STREAM_FAILED
;
1227 if ((done
= checkTransferDone()) != 0 || flags
.complete
) {
1228 debugs(88, 5, "clientReplyStatus: transfer is DONE: " << done
<< flags
.complete
);
1229 /* Ok we're finished, but how? */
1231 const int64_t expectedBodySize
=
1232 http
->storeEntry()->getReply()->bodySize(http
->request
->method
);
1233 if (!http
->request
->flags
.proxyKeepalive
&& expectedBodySize
< 0) {
1234 debugs(88, 5, "clientReplyStatus: closing, content_length < 0");
1235 return STREAM_FAILED
;
1239 debugs(88, 5, "clientReplyStatus: closing, !done, but read 0 bytes");
1240 return STREAM_FAILED
;
1243 if (expectedBodySize
>= 0 && !http
->gotEnough()) {
1244 debugs(88, 5, "clientReplyStatus: client didn't get all it expected");
1245 return STREAM_UNPLANNED_COMPLETE
;
1248 debugs(88, 5, "clientReplyStatus: stream complete; keepalive=" <<
1249 http
->request
->flags
.proxyKeepalive
);
1250 return STREAM_COMPLETE
;
1253 // XXX: Should this be checked earlier? We could return above w/o checking.
1254 if (reply
->receivedBodyTooLarge(*http
->request
, http
->out
.offset
- 4096)) {
1255 /* 4096 is a margin for the HTTP headers included in out.offset */
1256 debugs(88, 5, "clientReplyStatus: client reply body is too large");
1257 return STREAM_FAILED
;
1263 /* Responses with no body will not have a content-type header,
1264 * which breaks the rep_mime_type acl, which
1265 * coincidentally, is the most common acl for reply access lists.
1266 * A better long term fix for this is to allow acl matchs on the various
1267 * status codes, and then supply a default ruleset that puts these
1268 * codes before any user defines access entries. That way the user
1269 * can choose to block these responses where appropriate, but won't get
1270 * mysterious breakages.
1273 clientReplyContext::alwaysAllowResponse(Http::StatusCode sline
) const
1279 case Http::scContinue
:
1281 case Http::scSwitchingProtocols
:
1283 case Http::scProcessing
:
1285 case Http::scNoContent
:
1287 case Http::scNotModified
:
1299 * Generate the reply headers sent to client.
1301 * Filters out unwanted entries and hop-by-hop from original reply header
1302 * then adds extra entries if we have more info than origin server
1303 * then adds Squid specific entries
1306 clientReplyContext::buildReplyHeader()
1308 HttpHeader
*hdr
= &reply
->header
;
1309 int is_hit
= logTypeIsATcpHit(http
->logType
);
1310 HttpRequest
*request
= http
->request
;
1311 #if DONT_FILTER_THESE
1312 /* but you might want to if you run Squid as an HTTP accelerator */
1313 /* hdr->delById(HDR_ACCEPT_RANGES); */
1314 hdr
->delById(HDR_ETAG
);
1318 hdr
->delById(HDR_SET_COOKIE
);
1319 // TODO: RFC 2965 : Must honour Cache-Control: no-cache="set-cookie2" and remove header.
1321 // if there is not configured a peer proxy with login=PASS or login=PASSTHRU option enabled
1322 // remove the Proxy-Authenticate header
1323 if ( !request
->peer_login
|| (strcmp(request
->peer_login
,"PASS") != 0 && strcmp(request
->peer_login
,"PASSTHRU") != 0))
1324 reply
->header
.delById(HDR_PROXY_AUTHENTICATE
);
1326 reply
->header
.removeHopByHopEntries();
1328 // if (request->range)
1329 // clientBuildRangeHeader(http, reply);
1332 * Add a estimated Age header on cache hits.
1336 * Remove any existing Age header sent by upstream caches
1337 * (note that the existing header is passed along unmodified
1340 hdr
->delById(HDR_AGE
);
1342 * This adds the calculated object age. Note that the details of the
1343 * age calculation is performed by adjusting the timestamp in
1344 * StoreEntry::timestampsSet(), not here.
1346 if (EBIT_TEST(http
->storeEntry()->flags
, ENTRY_SPECIAL
)) {
1347 hdr
->delById(HDR_DATE
);
1348 hdr
->insertTime(HDR_DATE
, squid_curtime
);
1349 } else if (http
->getConn() && http
->getConn()->port
->actAsOrigin
) {
1350 // Swap the Date: header to current time if we are simulating an origin
1351 HttpHeaderEntry
*h
= hdr
->findEntry(HDR_DATE
);
1353 hdr
->putExt("X-Origin-Date", h
->value
.termedBuf());
1354 hdr
->delById(HDR_DATE
);
1355 hdr
->insertTime(HDR_DATE
, squid_curtime
);
1356 h
= hdr
->findEntry(HDR_EXPIRES
);
1357 if (h
&& http
->storeEntry()->expires
>= 0) {
1358 hdr
->putExt("X-Origin-Expires", h
->value
.termedBuf());
1359 hdr
->delById(HDR_EXPIRES
);
1360 hdr
->insertTime(HDR_EXPIRES
, squid_curtime
+ http
->storeEntry()->expires
- http
->storeEntry()->timestamp
);
1362 if (http
->storeEntry()->timestamp
<= squid_curtime
) {
1363 // put X-Cache-Age: instead of Age:
1365 snprintf(age
, sizeof(age
), "%" PRId64
, static_cast<int64_t>(squid_curtime
- http
->storeEntry()->timestamp
));
1366 hdr
->putExt("X-Cache-Age", age
);
1368 } else if (http
->storeEntry()->timestamp
<= squid_curtime
) {
1369 hdr
->putInt(HDR_AGE
,
1370 squid_curtime
- http
->storeEntry()->timestamp
);
1371 /* Signal old objects. NB: rfc 2616 is not clear,
1372 * by implication, on whether we should do this to all
1373 * responses, or only cache hits.
1374 * 14.46 states it ONLY applys for heuristically caclulated
1375 * freshness values, 13.2.4 doesn't specify the same limitation.
1376 * We interpret RFC 2616 under the combination.
1378 /* TODO: if maxage or s-maxage is present, don't do this */
1380 if (squid_curtime
- http
->storeEntry()->timestamp
>= 86400) {
1382 snprintf (tbuf
, sizeof(tbuf
), "%s %s %s",
1384 "This cache hit is still fresh and more than 1 day old");
1385 hdr
->putStr(HDR_WARNING
, tbuf
);
1390 /* RFC 2616: Section 14.18
1392 * Add a Date: header if missing.
1393 * We have access to a clock therefore are required to amend any shortcoming in servers.
1395 * NP: done after Age: to prevent ENTRY_SPECIAL double-handling this header.
1397 if ( !hdr
->has(HDR_DATE
) ) {
1398 if (!http
->storeEntry())
1399 hdr
->insertTime(HDR_DATE
, squid_curtime
);
1400 else if (http
->storeEntry()->timestamp
> 0)
1401 hdr
->insertTime(HDR_DATE
, http
->storeEntry()->timestamp
);
1403 debugs(88,DBG_IMPORTANT
,"BUG 3279: HTTP reply without Date:");
1404 /* dump something useful about the problem */
1405 http
->storeEntry()->dump(DBG_IMPORTANT
);
1409 // add Warnings required by RFC 2616 if serving a stale hit
1410 if (http
->request
->flags
.staleIfHit
&& logTypeIsATcpHit(http
->logType
)) {
1411 hdr
->putWarning(110, "Response is stale");
1412 if (http
->request
->flags
.needValidation
)
1413 hdr
->putWarning(111, "Revalidation failed");
1416 /* Filter unproxyable authentication types */
1417 if (http
->logType
!= LOG_TCP_DENIED
&&
1418 hdr
->has(HDR_WWW_AUTHENTICATE
)) {
1419 HttpHeaderPos pos
= HttpHeaderInitPos
;
1422 int connection_auth_blocked
= 0;
1423 while ((e
= hdr
->getEntry(&pos
))) {
1424 if (e
->id
== HDR_WWW_AUTHENTICATE
) {
1425 const char *value
= e
->value
.rawBuf();
1427 if ((strncasecmp(value
, "NTLM", 4) == 0 &&
1428 (value
[4] == '\0' || value
[4] == ' '))
1430 (strncasecmp(value
, "Negotiate", 9) == 0 &&
1431 (value
[9] == '\0' || value
[9] == ' '))
1433 (strncasecmp(value
, "Kerberos", 8) == 0 &&
1434 (value
[8] == '\0' || value
[8] == ' '))) {
1435 if (request
->flags
.connectionAuthDisabled
) {
1436 hdr
->delAt(pos
, connection_auth_blocked
);
1439 request
->flags
.mustKeepalive
= true;
1440 if (!request
->flags
.accelerated
&& !request
->flags
.intercepted
) {
1441 httpHeaderPutStrf(hdr
, HDR_PROXY_SUPPORT
, "Session-Based-Authentication");
1443 We send "Connection: Proxy-Support" header to mark
1444 Proxy-Support as a hop-by-hop header for intermediaries that do not
1445 understand the semantics of this header. The RFC should have included
1446 this recommendation.
1448 httpHeaderPutStrf(hdr
, HDR_CONNECTION
, "Proxy-support");
1455 if (connection_auth_blocked
)
1460 /* Handle authentication headers */
1461 if (http
->logType
== LOG_TCP_DENIED
&&
1462 ( reply
->sline
.status() == Http::scProxyAuthenticationRequired
||
1463 reply
->sline
.status() == Http::scUnauthorized
)
1465 /* Add authentication header */
1466 /*! \todo alter errorstate to be accel on|off aware. The 0 on the next line
1467 * depends on authenticate behaviour: all schemes to date send no extra
1468 * data on 407/401 responses, and do not check the accel state on 401/407
1471 authenticateFixHeader(reply
, request
->auth_user_request
, request
, 0, 1);
1472 } else if (request
->auth_user_request
!= NULL
)
1473 authenticateFixHeader(reply
, request
->auth_user_request
, request
, http
->flags
.accel
, 0);
1476 /* Append X-Cache */
1477 httpHeaderPutStrf(hdr
, HDR_X_CACHE
, "%s from %s",
1478 is_hit
? "HIT" : "MISS", getMyHostname());
1480 #if USE_CACHE_DIGESTS
1481 /* Append X-Cache-Lookup: -- temporary hack, to be removed @?@ @?@ */
1482 httpHeaderPutStrf(hdr
, HDR_X_CACHE_LOOKUP
, "%s from %s:%d",
1483 lookup_type
? lookup_type
: "NONE",
1484 getMyHostname(), getMyPort());
1488 const bool maySendChunkedReply
= !request
->multipartRangeRequest() &&
1489 reply
->sline
.protocol
== AnyP::PROTO_HTTP
&& // response is HTTP
1490 (request
->http_ver
>= Http::ProtocolVersion(1,1));
1492 /* Check whether we should send keep-alive */
1493 if (!Config
.onoff
.error_pconns
&& reply
->sline
.status() >= 400 && !request
->flags
.mustKeepalive
) {
1494 debugs(33, 3, "clientBuildReplyHeader: Error, don't keep-alive");
1495 request
->flags
.proxyKeepalive
= false;
1496 } else if (!Config
.onoff
.client_pconns
&& !request
->flags
.mustKeepalive
) {
1497 debugs(33, 2, "clientBuildReplyHeader: Connection Keep-Alive not requested by admin or client");
1498 request
->flags
.proxyKeepalive
= false;
1499 } else if (request
->flags
.proxyKeepalive
&& shutting_down
) {
1500 debugs(88, 3, "clientBuildReplyHeader: Shutting down, don't keep-alive.");
1501 request
->flags
.proxyKeepalive
= false;
1502 } else if (request
->flags
.connectionAuth
&& !reply
->keep_alive
) {
1503 debugs(33, 2, "clientBuildReplyHeader: Connection oriented auth but server side non-persistent");
1504 request
->flags
.proxyKeepalive
= false;
1505 } else if (reply
->bodySize(request
->method
) < 0 && !maySendChunkedReply
) {
1506 debugs(88, 3, "clientBuildReplyHeader: can't keep-alive, unknown body size" );
1507 request
->flags
.proxyKeepalive
= false;
1508 } else if (fdUsageHigh()&& !request
->flags
.mustKeepalive
) {
1509 debugs(88, 3, "clientBuildReplyHeader: Not many unused FDs, can't keep-alive");
1510 request
->flags
.proxyKeepalive
= false;
1511 } else if (request
->flags
.sslBumped
&& !reply
->persistent()) {
1512 // We do not really have to close, but we pretend we are a tunnel.
1513 debugs(88, 3, "clientBuildReplyHeader: bumped reply forces close");
1514 request
->flags
.proxyKeepalive
= false;
1515 } else if (request
->pinnedConnection() && !reply
->persistent()) {
1516 // The peer wants to close the pinned connection
1517 debugs(88, 3, "pinned reply forces close");
1518 request
->flags
.proxyKeepalive
= false;
1519 } else if (http
->getConn()) {
1520 ConnStateData
* conn
= http
->getConn();
1521 if (!Comm::IsConnOpen(conn
->port
->listenConn
)) {
1522 // The listening port closed because of a reconfigure
1523 debugs(88, 3, "listening port closed");
1524 request
->flags
.proxyKeepalive
= false;
1528 // Decide if we send chunked reply
1529 if (maySendChunkedReply
&&
1530 request
->flags
.proxyKeepalive
&&
1531 reply
->bodySize(request
->method
) < 0) {
1532 debugs(88, 3, "clientBuildReplyHeader: chunked reply");
1533 request
->flags
.chunkedReply
= true;
1534 hdr
->putStr(HDR_TRANSFER_ENCODING
, "chunked");
1538 if (Config
.onoff
.via
) {
1539 LOCAL_ARRAY(char, bbuf
, MAX_URL
+ 32);
1541 hdr
->getList(HDR_VIA
, &strVia
);
1542 snprintf(bbuf
, MAX_URL
+ 32, "%d.%d %s",
1543 reply
->sline
.version
.major
,
1544 reply
->sline
.version
.minor
,
1546 strListAdd(&strVia
, bbuf
, ',');
1547 hdr
->delById(HDR_VIA
);
1548 hdr
->putStr(HDR_VIA
, strVia
.termedBuf());
1550 /* Signal keep-alive or close explicitly */
1551 hdr
->putStr(HDR_CONNECTION
, request
->flags
.proxyKeepalive
? "keep-alive" : "close");
1553 #if ADD_X_REQUEST_URI
1555 * Knowing the URI of the request is useful when debugging persistent
1556 * connections in a client; we cannot guarantee the order of http headers,
1557 * but X-Request-URI is likely to be the very last header to ease use from a
1558 * debugger [hdr->entries.count-1].
1560 hdr
->putStr(HDR_X_REQUEST_URI
,
1561 http
->memOjbect()->url
? http
->memObject()->url
: http
->uri
);
1565 /* Surrogate-Control requires Surrogate-Capability from upstream to pass on */
1566 if ( hdr
->has(HDR_SURROGATE_CONTROL
) ) {
1567 if (!request
->header
.has(HDR_SURROGATE_CAPABILITY
)) {
1568 hdr
->delById(HDR_SURROGATE_CONTROL
);
1570 /* TODO: else case: drop any controls intended specifically for our surrogate ID */
1573 httpHdrMangleList(hdr
, request
, ROR_REPLY
);
1577 clientReplyContext::cloneReply()
1579 assert(reply
== NULL
);
1581 reply
= http
->storeEntry()->getReply()->clone();
1584 if (reply
->sline
.protocol
== AnyP::PROTO_HTTP
) {
1585 /* RFC 2616 requires us to advertise our version (but only on real HTTP traffic) */
1586 reply
->sline
.version
= Http::ProtocolVersion();
1589 /* do header conversions */
1593 /// Safely disposes of an entry pointing to a cache hit that we do not want.
1594 /// We cannot just ignore the entry because it may be locking or otherwise
1595 /// holding an associated cache resource of some sort.
1597 clientReplyContext::forgetHit()
1599 StoreEntry
*e
= http
->storeEntry();
1600 assert(e
); // or we are not dealing with a hit
1601 // We probably have not locked the entry earlier, unfortunately. We lock it
1602 // now so that we can unlock two lines later (and trigger cleanup).
1603 // Ideally, ClientHttpRequest::storeEntry() should lock/unlock, but it is
1604 // used so inconsistently that simply adding locking there leads to bugs.
1605 e
->lock("clientReplyContext::forgetHit");
1606 http
->storeEntry(NULL
);
1607 e
->unlock("clientReplyContext::forgetHit"); // may delete e
1611 clientReplyContext::identifyStoreObject()
1613 HttpRequest
*r
= http
->request
;
1615 if (r
->flags
.cachable
|| r
->flags
.internal
) {
1616 lookingforstore
= 5;
1617 StoreEntry::getPublicByRequest (this, r
);
1619 identifyFoundObject (NullStoreEntry::getInstance());
1624 * Check state of the current StoreEntry object.
1625 * to see if we can determine the final status of the request.
1628 clientReplyContext::identifyFoundObject(StoreEntry
*newEntry
)
1630 StoreEntry
*e
= newEntry
;
1631 HttpRequest
*r
= http
->request
;
1633 /** \li If the entry received isNull() then we ignore it. */
1635 http
->storeEntry(NULL
);
1637 http
->storeEntry(e
);
1640 e
= http
->storeEntry();
1642 /* Release IP-cache entries on reload */
1643 /** \li If the request has no-cache flag set or some no_cache HACK in operation we
1644 * 'invalidate' the cached IP entries for this request ???
1646 if (r
->flags
.noCache
|| r
->flags
.noCacheHack())
1647 ipcacheInvalidateNegative(r
->GetHost());
1649 #if USE_CACHE_DIGESTS
1650 lookup_type
= http
->storeEntry() ? "HIT" : "MISS";
1653 if (NULL
== http
->storeEntry()) {
1654 /** \li If no StoreEntry object is current assume this object isn't in the cache set MISS*/
1655 debugs(85, 3, "StoreEntry is NULL - MISS");
1656 http
->logType
= LOG_TCP_MISS
;
1661 if (Config
.onoff
.offline
) {
1662 /** \li If we are running in offline mode set to HIT */
1663 debugs(85, 3, "offline HIT " << *e
);
1664 http
->logType
= LOG_TCP_HIT
;
1669 if (http
->redirect
.status
) {
1670 /** \li If redirection status is True force this to be a MISS */
1671 debugs(85, 3, "REDIRECT status forced StoreEntry to NULL (no body on 3XX responses) " << *e
);
1673 http
->logType
= LOG_TCP_REDIRECT
;
1678 if (!e
->validToSend()) {
1679 debugs(85, 3, "!storeEntryValidToSend MISS " << *e
);
1681 http
->logType
= LOG_TCP_MISS
;
1686 if (EBIT_TEST(e
->flags
, ENTRY_SPECIAL
)) {
1687 /* \li Special entries are always hits, no matter what the client says */
1688 debugs(85, 3, "ENTRY_SPECIAL HIT " << *e
);
1689 http
->logType
= LOG_TCP_HIT
;
1694 if (r
->flags
.noCache
) {
1695 debugs(85, 3, "no-cache REFRESH MISS " << *e
);
1697 http
->logType
= LOG_TCP_CLIENT_REFRESH_MISS
;
1702 debugs(85, 3, "default HIT " << *e
);
1703 http
->logType
= LOG_TCP_HIT
;
1708 * Request more data from the store for the client Stream
1709 * This is *the* entry point to this module.
1712 * - This is the head of the list.
1713 * - There is at least one more node.
1714 * - Data context is not null
1717 clientGetMoreData(clientStreamNode
* aNode
, ClientHttpRequest
* http
)
1719 /* Test preconditions */
1720 assert(aNode
!= NULL
);
1721 assert(cbdataReferenceValid(aNode
));
1722 assert(aNode
->node
.prev
== NULL
);
1723 assert(aNode
->node
.next
!= NULL
);
1724 clientReplyContext
*context
= dynamic_cast<clientReplyContext
*>(aNode
->data
.getRaw());
1726 assert(context
->http
== http
);
1728 clientStreamNode
*next
= ( clientStreamNode
*)aNode
->node
.next
->data
;
1730 if (!context
->ourNode
)
1731 context
->ourNode
= aNode
;
1733 /* no cbdatareference, this is only used once, and safely */
1734 if (context
->flags
.storelogiccomplete
) {
1735 StoreIOBuffer tempBuffer
;
1736 tempBuffer
.offset
= next
->readBuffer
.offset
+ context
->headers_sz
;
1737 tempBuffer
.length
= next
->readBuffer
.length
;
1738 tempBuffer
.data
= next
->readBuffer
.data
;
1740 storeClientCopy(context
->sc
, http
->storeEntry(),
1741 tempBuffer
, clientReplyContext::SendMoreData
, context
);
1745 if (context
->http
->request
->method
== Http::METHOD_PURGE
) {
1746 context
->purgeRequest();
1750 // OPTIONS with Max-Forwards:0 handled in clientProcessRequest()
1752 if (context
->http
->request
->method
== Http::METHOD_TRACE
) {
1753 if (context
->http
->request
->header
.getInt64(HDR_MAX_FORWARDS
) == 0) {
1754 context
->traceReply(aNode
);
1758 /* continue forwarding, not finished yet. */
1759 http
->logType
= LOG_TCP_MISS
;
1761 context
->doGetMoreData();
1763 context
->identifyStoreObject();
1767 clientReplyContext::doGetMoreData()
1769 /* We still have to do store logic processing - vary, cache hit etc */
1770 if (http
->storeEntry() != NULL
) {
1771 /* someone found the object in the cache for us */
1772 StoreIOBuffer localTempBuffer
;
1774 http
->storeEntry()->lock("clientReplyContext::doGetMoreData");
1776 MemObject
*mem_obj
= http
->storeEntry()->makeMemObject();
1777 if (!mem_obj
->hasUris()) {
1779 * This if-block exists because we don't want to clobber
1780 * a preexiting mem_obj->method value if the mem_obj
1781 * already exists. For example, when a HEAD request
1782 * is a cache hit for a GET response, we want to keep
1783 * the method as GET.
1785 mem_obj
->setUris(storeId(), http
->log_uri
, http
->request
->method
);
1787 * Here we can see if the object was
1788 * created using URL or alternative StoreID from helper.
1790 debugs(88, 3, "storeId: " << http
->storeEntry()->mem_obj
->storeId());
1793 sc
= storeClientListAdd(http
->storeEntry(), this);
1795 sc
->setDelayId(DelayId::DelayClient(http
));
1798 assert(http
->logType
== LOG_TCP_HIT
);
1800 /* guarantee nothing has been sent yet! */
1801 assert(http
->out
.size
== 0);
1802 assert(http
->out
.offset
== 0);
1804 if (Ip::Qos::TheConfig
.isHitTosActive()) {
1805 Ip::Qos::doTosLocalHit(http
->getConn()->clientConnection
);
1808 if (Ip::Qos::TheConfig
.isHitNfmarkActive()) {
1809 Ip::Qos::doNfmarkLocalHit(http
->getConn()->clientConnection
);
1812 localTempBuffer
.offset
= reqofs
;
1813 localTempBuffer
.length
= getNextNode()->readBuffer
.length
;
1814 localTempBuffer
.data
= getNextNode()->readBuffer
.data
;
1815 storeClientCopy(sc
, http
->storeEntry(), localTempBuffer
, CacheHit
, this);
1817 /* MISS CASE, http->logType is already set! */
1822 /** The next node has removed itself from the stream. */
1824 clientReplyDetach(clientStreamNode
* node
, ClientHttpRequest
* http
)
1826 /** detach from the stream */
1827 clientStreamDetach(node
, http
);
1831 * Accepts chunk of a http message in buf, parses prefix, filters headers and
1832 * such, writes processed message to the message recipient
1835 clientReplyContext::SendMoreData(void *data
, StoreIOBuffer result
)
1837 clientReplyContext
*context
= static_cast<clientReplyContext
*>(data
);
1838 context
->sendMoreData (result
);
1842 clientReplyContext::makeThisHead()
1844 /* At least, I think thats what this does */
1845 dlinkDelete(&http
->active
, &ClientActiveRequests
);
1846 dlinkAdd(http
, &http
->active
, &ClientActiveRequests
);
1850 clientReplyContext::errorInStream(StoreIOBuffer
const &result
, size_t const &sizeToProcess
)const
1852 return /* aborted request */
1853 (http
->storeEntry() && EBIT_TEST(http
->storeEntry()->flags
, ENTRY_ABORTED
)) ||
1854 /* Upstream read error */ (result
.flags
.error
) ||
1855 /* Upstream EOF */ (sizeToProcess
== 0);
1859 clientReplyContext::sendStreamError(StoreIOBuffer
const &result
)
1861 /** call clientWriteComplete so the client socket gets closed
1863 * We call into the stream, because we don't know that there is a
1866 debugs(88, 5, "clientReplyContext::sendStreamError: A stream error has occured, marking as complete and sending no data.");
1867 StoreIOBuffer localTempBuffer
;
1869 http
->request
->flags
.streamError
= true;
1870 localTempBuffer
.flags
.error
= result
.flags
.error
;
1871 clientStreamCallback((clientStreamNode
*)http
->client_stream
.head
->data
, http
, NULL
,
1876 clientReplyContext::pushStreamData(StoreIOBuffer
const &result
, char *source
)
1878 StoreIOBuffer localTempBuffer
;
1880 if (result
.length
== 0) {
1881 debugs(88, 5, "clientReplyContext::pushStreamData: marking request as complete due to 0 length store result");
1885 assert(result
.offset
- headers_sz
== next()->readBuffer
.offset
);
1886 localTempBuffer
.offset
= result
.offset
- headers_sz
;
1887 localTempBuffer
.length
= result
.length
;
1889 if (localTempBuffer
.length
)
1890 localTempBuffer
.data
= source
;
1892 clientStreamCallback((clientStreamNode
*)http
->client_stream
.head
->data
, http
, NULL
,
1897 clientReplyContext::next() const
1899 assert ( (clientStreamNode
*)http
->client_stream
.head
->next
->data
== getNextNode());
1900 return getNextNode();
1904 clientReplyContext::sendBodyTooLargeError()
1906 Ip::Address tmp_noaddr
;
1907 tmp_noaddr
.setNoAddr(); // TODO: make a global const
1908 http
->logType
= LOG_TCP_DENIED_REPLY
;
1909 ErrorState
*err
= clientBuildError(ERR_TOO_BIG
, Http::scForbidden
, NULL
,
1910 http
->getConn() != NULL
? http
->getConn()->clientConnection
->remote
: tmp_noaddr
,
1912 removeClientStoreReference(&(sc
), http
);
1913 HTTPMSGUNLOCK(reply
);
1918 /// send 412 (Precondition Failed) to client
1920 clientReplyContext::sendPreconditionFailedError()
1922 http
->logType
= LOG_TCP_HIT
;
1923 ErrorState
*const err
=
1924 clientBuildError(ERR_PRECONDITION_FAILED
, Http::scPreconditionFailed
,
1925 NULL
, http
->getConn()->clientConnection
->remote
, http
->request
);
1926 removeClientStoreReference(&sc
, http
);
1927 HTTPMSGUNLOCK(reply
);
1931 /// send 304 (Not Modified) to client
1933 clientReplyContext::sendNotModified()
1935 StoreEntry
*e
= http
->storeEntry();
1936 const time_t timestamp
= e
->timestamp
;
1937 HttpReply
*const temprep
= e
->getReply()->make304();
1938 http
->logType
= LOG_TCP_IMS_HIT
;
1939 removeClientStoreReference(&sc
, http
);
1940 createStoreEntry(http
->request
->method
, RequestFlags());
1941 e
= http
->storeEntry();
1942 // Copy timestamp from the original entry so the 304
1943 // reply has a meaningful Age: header.
1945 e
->timestamp
= timestamp
;
1946 e
->replaceHttpReply(temprep
);
1949 * TODO: why put this in the store and then serialise it and
1950 * then parse it again. Simply mark the request complete in
1951 * our context and write the reply struct to the client side.
1953 triggerInitialStoreRead();
1956 /// send 304 (Not Modified) or 412 (Precondition Failed) to client
1957 /// depending on request method
1959 clientReplyContext::sendNotModifiedOrPreconditionFailedError()
1961 if (http
->request
->method
== Http::METHOD_GET
||
1962 http
->request
->method
== Http::METHOD_HEAD
)
1965 sendPreconditionFailedError();
1969 clientReplyContext::processReplyAccess ()
1971 /* NP: this should probably soft-fail to a zero-sized-reply error ?? */
1974 /** Don't block our own responses or HTTP status messages */
1975 if (http
->logType
== LOG_TCP_DENIED
||
1976 http
->logType
== LOG_TCP_DENIED_REPLY
||
1977 alwaysAllowResponse(reply
->sline
.status())) {
1978 headers_sz
= reply
->hdr_sz
;
1979 processReplyAccessResult(ACCESS_ALLOWED
);
1983 /** Check for reply to big error */
1984 if (reply
->expectedBodyTooLarge(*http
->request
)) {
1985 sendBodyTooLargeError();
1989 headers_sz
= reply
->hdr_sz
;
1991 /** check for absent access controls (permit by default) */
1992 if (!Config
.accessList
.reply
) {
1993 processReplyAccessResult(ACCESS_ALLOWED
);
1997 /** Process http_reply_access lists */
1998 ACLFilledChecklist
*replyChecklist
=
1999 clientAclChecklistCreate(Config
.accessList
.reply
, http
);
2000 replyChecklist
->reply
= reply
;
2001 HTTPMSGLOCK(replyChecklist
->reply
);
2002 replyChecklist
->nonBlockingCheck(ProcessReplyAccessResult
, this);
2006 clientReplyContext::ProcessReplyAccessResult(allow_t rv
, void *voidMe
)
2008 clientReplyContext
*me
= static_cast<clientReplyContext
*>(voidMe
);
2009 me
->processReplyAccessResult(rv
);
2013 clientReplyContext::processReplyAccessResult(const allow_t
&accessAllowed
)
2015 debugs(88, 2, "The reply for " << http
->request
->method
2016 << ' ' << http
->uri
<< " is " << accessAllowed
<< ", because it matched "
2017 << (AclMatchedName
? AclMatchedName
: "NO ACL's"));
2019 if (accessAllowed
!= ACCESS_ALLOWED
) {
2022 page_id
= aclGetDenyInfoPage(&Config
.denyInfoList
, AclMatchedName
, 1);
2024 http
->logType
= LOG_TCP_DENIED_REPLY
;
2026 if (page_id
== ERR_NONE
)
2027 page_id
= ERR_ACCESS_DENIED
;
2029 Ip::Address tmp_noaddr
;
2030 tmp_noaddr
.setNoAddr();
2031 err
= clientBuildError(page_id
, Http::scForbidden
, NULL
,
2032 http
->getConn() != NULL
? http
->getConn()->clientConnection
->remote
: tmp_noaddr
,
2035 removeClientStoreReference(&sc
, http
);
2037 HTTPMSGUNLOCK(reply
);
2044 /* Ok, the reply is allowed, */
2045 http
->loggingEntry(http
->storeEntry());
2047 ssize_t body_size
= reqofs
- reply
->hdr_sz
;
2048 if (body_size
< 0) {
2049 reqofs
= reply
->hdr_sz
;
2053 debugs(88, 3, "clientReplyContext::sendMoreData: Appending " <<
2054 (int) body_size
<< " bytes after " << reply
->hdr_sz
<<
2055 " bytes of headers");
2059 if (http
->flags
.accel
&& reply
->sline
.status() != Http::scForbidden
&&
2060 !alwaysAllowResponse(reply
->sline
.status()) &&
2061 esiEnableProcessing(reply
)) {
2062 debugs(88, 2, "Enabling ESI processing for " << http
->uri
);
2063 clientStreamInsertHead(&http
->client_stream
, esiStreamRead
,
2064 esiProcessStream
, esiStreamDetach
, esiStreamStatus
, NULL
);
2069 if (http
->request
->method
== Http::METHOD_HEAD
) {
2070 /* do not forward body for HEAD replies */
2072 http
->flags
.done_copying
= true;
2076 assert (!flags
.headersSent
);
2077 flags
.headersSent
= true;
2079 StoreIOBuffer localTempBuffer
;
2080 char *buf
= next()->readBuffer
.data
;
2081 char *body_buf
= buf
+ reply
->hdr_sz
;
2083 //Server side may disable ranges under some circumstances.
2085 if ((!http
->request
->range
))
2086 next()->readBuffer
.offset
= 0;
2088 body_buf
-= next()->readBuffer
.offset
;
2090 if (next()->readBuffer
.offset
!= 0) {
2091 if (next()->readBuffer
.offset
> body_size
) {
2092 /* Can't use any of the body we received. send nothing */
2093 localTempBuffer
.length
= 0;
2094 localTempBuffer
.data
= NULL
;
2096 localTempBuffer
.length
= body_size
- next()->readBuffer
.offset
;
2097 localTempBuffer
.data
= body_buf
+ next()->readBuffer
.offset
;
2100 localTempBuffer
.length
= body_size
;
2101 localTempBuffer
.data
= body_buf
;
2104 /* TODO??: move the data in the buffer back by the request header size */
2105 clientStreamCallback((clientStreamNode
*)http
->client_stream
.head
->data
,
2106 http
, reply
, localTempBuffer
);
2112 clientReplyContext::sendMoreData (StoreIOBuffer result
)
2117 StoreEntry
*entry
= http
->storeEntry();
2119 ConnStateData
* conn
= http
->getConn();
2121 // too late, our conn is closing
2122 // TODO: should we also quit?
2124 debugs(33,3, "not sending more data to a closed connection" );
2127 if (!conn
->isOpen()) {
2128 debugs(33,3, "not sending more data to closing connection " << conn
->clientConnection
);
2131 if (conn
->pinning
.zeroReply
) {
2132 debugs(33,3, "not sending more data after a pinned zero reply " << conn
->clientConnection
);
2136 char *buf
= next()->readBuffer
.data
;
2138 if (buf
!= result
.data
) {
2139 /* we've got to copy some data */
2140 assert(result
.length
<= next()->readBuffer
.length
);
2141 memcpy(buf
, result
.data
, result
.length
);
2144 if (reqofs
==0 && !logTypeIsATcpHit(http
->logType
) && Comm::IsConnOpen(conn
->clientConnection
)) {
2145 if (Ip::Qos::TheConfig
.isHitTosActive()) {
2146 Ip::Qos::doTosLocalMiss(conn
->clientConnection
, http
->request
->hier
.code
);
2148 if (Ip::Qos::TheConfig
.isHitNfmarkActive()) {
2149 Ip::Qos::doNfmarkLocalMiss(conn
->clientConnection
, http
->request
->hier
.code
);
2153 /* We've got the final data to start pushing... */
2154 flags
.storelogiccomplete
= 1;
2156 reqofs
+= result
.length
;
2158 assert(reqofs
<= HTTP_REQBUF_SZ
|| flags
.headersSent
);
2160 assert(http
->request
!= NULL
);
2162 /* ESI TODO: remove this assert once everything is stable */
2163 assert(http
->client_stream
.head
->data
2164 && cbdataReferenceValid(http
->client_stream
.head
->data
));
2168 debugs(88, 5, "clientReplyContext::sendMoreData: " << http
->uri
<< ", " <<
2169 reqofs
<< " bytes (" << result
.length
<<
2171 debugs(88, 5, "clientReplyContext::sendMoreData:"
2172 << conn
->clientConnection
<<
2173 " '" << entry
->url() << "'" <<
2174 " out.offset=" << http
->out
.offset
);
2176 /* update size of the request */
2179 if (errorInStream(result
, reqofs
)) {
2180 sendStreamError(result
);
2184 if (flags
.headersSent
) {
2185 pushStreamData (result
, buf
);
2191 /* handle headers */
2193 if (Config
.onoff
.log_mime_hdrs
) {
2196 if ((k
= headersEnd(buf
, reqofs
))) {
2197 safe_free(http
->al
->headers
.reply
);
2198 http
->al
->headers
.reply
= (char *)xcalloc(k
+ 1, 1);
2199 xstrncpy(http
->al
->headers
.reply
, buf
, k
);
2203 holdingBuffer
= result
;
2204 processReplyAccess();
2208 /* Using this breaks the client layering just a little!
2211 clientReplyContext::createStoreEntry(const HttpRequestMethod
& m
, RequestFlags reqFlags
)
2213 assert(http
!= NULL
);
2215 * For erroneous requests, we might not have a h->request,
2216 * so make a fake one.
2219 if (http
->request
== NULL
) {
2220 http
->request
= new HttpRequest(m
, AnyP::PROTO_NONE
, null_string
);
2221 HTTPMSGLOCK(http
->request
);
2224 StoreEntry
*e
= storeCreateEntry(storeId(), http
->log_uri
, reqFlags
, m
);
2226 // Make entry collapsable ASAP, to increase collapsing chances for others,
2227 // TODO: every must-revalidate and similar request MUST reach the origin,
2228 // but do we have to prohibit others from collapsing on that request?
2229 if (Config
.onoff
.collapsed_forwarding
&& reqFlags
.cachable
&&
2230 !reqFlags
.needValidation
&&
2231 (m
== Http::METHOD_GET
|| m
== Http::METHOD_HEAD
)) {
2232 // make the entry available for future requests now
2233 Store::Root().allowCollapsing(e
, reqFlags
, m
);
2236 sc
= storeClientListAdd(e
, this);
2239 sc
->setDelayId(DelayId::DelayClient(http
));
2246 /* I don't think this is actually needed! -- adrian */
2247 /* http->reqbuf = http->norm_reqbuf; */
2248 // assert(http->reqbuf == http->norm_reqbuf);
2249 /* The next line is illegal because we don't know if the client stream
2250 * buffers have been set up
2252 // storeClientCopy(http->sc, e, 0, HTTP_REQBUF_SZ, http->reqbuf,
2253 // SendMoreData, this);
2254 /* So, we mark the store logic as complete */
2255 flags
.storelogiccomplete
= 1;
2257 /* and get the caller to request a read, from whereever they are */
2258 /* NOTE: after ANY data flows down the pipe, even one step,
2259 * this function CAN NOT be used to manage errors
2261 http
->storeEntry(e
);
2265 clientBuildError(err_type page_id
, Http::StatusCode status
, char const *url
,
2266 Ip::Address
&src_addr
, HttpRequest
* request
)
2268 ErrorState
*err
= new ErrorState(page_id
, status
, request
);
2269 err
->src_addr
= src_addr
;
2272 err
->url
= xstrdup(url
);