5 * AUTHOR: Duane Wessels
7 * SQUID Web Proxy Cache http://www.squid-cache.org/
8 * ----------------------------------------------------------
10 * Squid is the result of efforts by numerous individuals from
11 * the Internet community; see the CONTRIBUTORS file for full
12 * details. Many organizations have provided support for Squid's
13 * development; see the SPONSORS file for full details. Squid is
14 * Copyrighted (C) 2001 by the Regents of the University of
15 * California; see the COPYRIGHT file for full details. Squid
16 * incorporates software developed and/or copyrighted by other
17 * sources; see the CREDITS file for full details.
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
36 #include "acl/Gadgets.h"
37 #include "base/TextException.h"
38 #include "comm/Connection.h"
39 #include "comm/forward.h"
40 #include "comm/Write.h"
43 #include "HttpRequest.h"
44 #include "HttpReply.h"
45 #include "errorpage.h"
46 #include "err_detail_type.h"
47 #include "SquidTime.h"
50 #include "adaptation/AccessCheck.h"
51 #include "adaptation/Answer.h"
52 #include "adaptation/Iterator.h"
55 // implemented in client_side_reply.cc until sides have a common parent
56 extern void purgeEntriesByUrl(HttpRequest
* req
, const char *url
);
59 ServerStateData::ServerStateData(FwdState
*theFwdState
): AsyncJob("ServerStateData"),
62 adaptedHeadSource(NULL
),
63 adaptationAccessCheckPending(false),
64 startedAdaptation(false),
66 receivedWholeRequestBody(false)
73 request
= HTTPMSGLOCK(fwd
->request
);
76 ServerStateData::~ServerStateData()
78 // paranoid: check that swanSong has been called
79 assert(!requestBodySource
);
81 assert(!virginBodyDestination
);
82 assert(!adaptedBodySource
);
87 HTTPMSGUNLOCK(request
);
88 HTTPMSGUNLOCK(theVirginReply
);
89 HTTPMSGUNLOCK(theFinalReply
);
91 fwd
= NULL
; // refcounted
93 if (responseBodyBuffer
!= NULL
) {
94 delete responseBodyBuffer
;
95 responseBodyBuffer
= NULL
;
100 ServerStateData::swanSong()
102 // get rid of our piping obligations
103 if (requestBodySource
!= NULL
)
104 stopConsumingFrom(requestBodySource
);
110 BodyConsumer::swanSong();
112 Initiator::swanSong();
113 BodyProducer::swanSong();
116 // paranoid: check that swanSong has been called
117 // extra paranoid: yeah, I really mean it. they MUST pass here.
118 assert(!requestBodySource
);
120 assert(!virginBodyDestination
);
121 assert(!adaptedBodySource
);
127 ServerStateData::virginReply()
129 assert(theVirginReply
);
130 return theVirginReply
;
134 ServerStateData::virginReply() const
136 assert(theVirginReply
);
137 return theVirginReply
;
141 ServerStateData::setVirginReply(HttpReply
*rep
)
143 debugs(11,5, HERE
<< this << " setting virgin reply to " << rep
);
144 assert(!theVirginReply
);
146 theVirginReply
= HTTPMSGLOCK(rep
);
147 return theVirginReply
;
151 ServerStateData::finalReply()
153 assert(theFinalReply
);
154 return theFinalReply
;
158 ServerStateData::setFinalReply(HttpReply
*rep
)
160 debugs(11,5, HERE
<< this << " setting final reply to " << rep
);
162 assert(!theFinalReply
);
164 theFinalReply
= HTTPMSGLOCK(rep
);
166 // give entry the reply because haveParsedReplyHeaders() expects it there
167 entry
->replaceHttpReply(theFinalReply
, false); // but do not write yet
168 haveParsedReplyHeaders(); // update the entry/reply (e.g., set timestamps)
169 entry
->startWriting(); // write the updated entry to store
171 return theFinalReply
;
174 // called when no more server communication is expected; may quit
176 ServerStateData::serverComplete()
178 debugs(11,5,HERE
<< "serverComplete " << this);
180 if (!doneWithServer()) {
182 assert(doneWithServer());
187 HttpRequest
*r
= originalRequest();
188 r
->hier
.total_response_time
= r
->hier
.first_conn_start
.tv_sec
?
189 tvSubMsec(r
->hier
.first_conn_start
, current_time
) : -1;
191 if (requestBodySource
!= NULL
)
192 stopConsumingFrom(requestBodySource
);
194 if (responseBodyBuffer
!= NULL
)
201 ServerStateData::serverComplete2()
203 debugs(11,5,HERE
<< "serverComplete2 " << this);
206 if (virginBodyDestination
!= NULL
)
207 stopProducingFor(virginBodyDestination
, true);
209 if (!doneWithAdaptation())
213 completeForwarding();
217 // When we are done talking to the primary server, we may be still talking
218 // to the ICAP service. And vice versa. Here, we quit only if we are done
220 void ServerStateData::quitIfAllDone()
223 if (!doneWithAdaptation()) {
224 debugs(11,5, HERE
<< "transaction not done: still talking to ICAP");
229 if (!doneWithServer()) {
230 debugs(11,5, HERE
<< "transaction not done: still talking to server");
234 debugs(11,3, HERE
<< "transaction done");
236 deleteThis("ServerStateData::quitIfAllDone");
239 // FTP side overloads this to work around multiple calls to fwd->complete
241 ServerStateData::completeForwarding()
243 debugs(11,5, HERE
<< "completing forwarding for " << fwd
);
248 // Register to receive request body
249 bool ServerStateData::startRequestBodyFlow()
251 HttpRequest
*r
= originalRequest();
252 assert(r
->body_pipe
!= NULL
);
253 requestBodySource
= r
->body_pipe
;
254 if (requestBodySource
->setConsumerIfNotLate(this)) {
255 debugs(11,3, HERE
<< "expecting request body from " <<
256 requestBodySource
->status());
260 debugs(11,3, HERE
<< "aborting on partially consumed request body: " <<
261 requestBodySource
->status());
262 requestBodySource
= NULL
;
266 // Entry-dependent callbacks use this check to quit if the entry went bad
268 ServerStateData::abortOnBadEntry(const char *abortReason
)
270 if (entry
->isAccepting())
273 debugs(11,5, HERE
<< "entry is not Accepting!");
274 abortTransaction(abortReason
);
278 // more request or adapted response body is available
280 ServerStateData::noteMoreBodyDataAvailable(BodyPipe::Pointer bp
)
283 if (adaptedBodySource
== bp
) {
284 handleMoreAdaptedBodyAvailable();
288 handleMoreRequestBodyAvailable();
291 // the entire request or adapted response body was provided, successfully
293 ServerStateData::noteBodyProductionEnded(BodyPipe::Pointer bp
)
296 if (adaptedBodySource
== bp
) {
297 handleAdaptedBodyProductionEnded();
301 handleRequestBodyProductionEnded();
304 // premature end of the request or adapted response body production
306 ServerStateData::noteBodyProducerAborted(BodyPipe::Pointer bp
)
309 if (adaptedBodySource
== bp
) {
310 handleAdaptedBodyProducerAborted();
314 handleRequestBodyProducerAborted();
318 // more origin request body data is available
320 ServerStateData::handleMoreRequestBodyAvailable()
323 sendMoreRequestBody();
325 debugs(9,3, HERE
<< "waiting for request body write to complete");
328 // there will be no more handleMoreRequestBodyAvailable calls
330 ServerStateData::handleRequestBodyProductionEnded()
332 receivedWholeRequestBody
= true;
334 doneSendingRequestBody();
336 debugs(9,3, HERE
<< "waiting for request body write to complete");
339 // called when we are done sending request body; kids extend this
341 ServerStateData::doneSendingRequestBody()
343 debugs(9,3, HERE
<< "done sending request body");
344 assert(requestBodySource
!= NULL
);
345 stopConsumingFrom(requestBodySource
);
350 // called when body producers aborts; kids extend this
352 ServerStateData::handleRequestBodyProducerAborted()
354 if (requestSender
!= NULL
)
355 debugs(9,3, HERE
<< "fyi: request body aborted while we were sending");
357 fwd
->dontRetry(true); // the problem is not with the server
358 stopConsumingFrom(requestBodySource
); // requestSender, if any, will notice
363 // called when we wrote request headers(!) or a part of the body
365 ServerStateData::sentRequestBody(const CommIoCbParams
&io
)
367 debugs(11, 5, "sentRequestBody: FD " << io
.fd
<< ": size " << io
.size
<< ": errflag " << io
.flag
<< ".");
368 debugs(32,3,HERE
<< "sentRequestBody called");
370 requestSender
= NULL
;
373 fd_bytes(io
.fd
, io
.size
, FD_WRITE
);
374 kb_incr(&statCounter
.server
.all
.kbytes_out
, io
.size
);
375 // kids should increment their counters
378 if (io
.flag
== COMM_ERR_CLOSING
)
381 if (!requestBodySource
) {
382 debugs(9,3, HERE
<< "detected while-we-were-sending abort");
383 return; // do nothing;
387 debugs(11, 1, "sentRequestBody error: FD " << io
.fd
<< ": " << xstrerr(io
.xerrno
));
389 err
= errorCon(ERR_WRITE_ERROR
, HTTP_BAD_GATEWAY
, fwd
->request
);
390 err
->xerrno
= io
.xerrno
;
392 abortTransaction("I/O error while sending request body");
396 if (EBIT_TEST(entry
->flags
, ENTRY_ABORTED
)) {
397 abortTransaction("store entry aborted while sending request body");
401 if (!requestBodySource
->exhausted())
402 sendMoreRequestBody();
403 else if (receivedWholeRequestBody
)
404 doneSendingRequestBody();
406 debugs(9,3, HERE
<< "waiting for body production end or abort");
410 ServerStateData::sendMoreRequestBody()
412 assert(requestBodySource
!= NULL
);
413 assert(!requestSender
);
415 const Comm::ConnectionPointer conn
= dataConnection();
417 if (!Comm::IsConnOpen(conn
)) {
418 debugs(9,3, HERE
<< "cannot send request body to closing " << conn
);
419 return; // wait for the kid's close handler; TODO: assert(closer);
423 if (getMoreRequestBody(buf
) && buf
.contentSize() > 0) {
424 debugs(9,3, HERE
<< "will write " << buf
.contentSize() << " request body bytes");
425 typedef CommCbMemFunT
<ServerStateData
, CommIoCbParams
> Dialer
;
426 requestSender
= JobCallback(93,3, Dialer
, this, ServerStateData::sentRequestBody
);
427 Comm::Write(conn
, &buf
, requestSender
);
429 debugs(9,3, HERE
<< "will wait for more request body bytes or eof");
430 requestSender
= NULL
;
434 /// either fill buf with available [encoded] request body bytes or return false
436 ServerStateData::getMoreRequestBody(MemBuf
&buf
)
438 // default implementation does not encode request body content
439 Must(requestBodySource
!= NULL
);
440 return requestBodySource
->getMoreData(buf
);
443 // Compares hosts in urls, returns false if different, no sheme, or no host.
445 sameUrlHosts(const char *url1
, const char *url2
)
447 // XXX: Want urlHostname() here, but it uses static storage and copying
448 const char *host1
= strchr(url1
, ':');
449 const char *host2
= strchr(url2
, ':');
451 if (host1
&& host2
) {
452 // skip scheme slashes
456 } while (*host1
== '/' && *host2
== '/');
459 return false; // no host
461 // increment while the same until we reach the end of the URL/host
462 while (*host1
&& *host1
!= '/' && *host1
== *host2
) {
466 return *host1
== *host2
;
469 return false; // no URL scheme
472 // purges entries that match the value of a given HTTP [response] header
474 purgeEntriesByHeader(HttpRequest
*req
, const char *reqUrl
, HttpMsg
*rep
, http_hdr_type hdr
)
476 const char *hdrUrl
, *absUrl
;
479 hdrUrl
= rep
->header
.getStr(hdr
);
480 if (hdrUrl
== NULL
) {
485 * If the URL is relative, make it absolute so we can find it.
486 * If it's absolute, make sure the host parts match to avoid DOS attacks
487 * as per RFC 2616 13.10.
489 if (urlIsRelative(hdrUrl
)) {
490 absUrl
= urlMakeAbsolute(req
, hdrUrl
);
491 if (absUrl
!= NULL
) {
494 } else if (!sameUrlHosts(reqUrl
, hdrUrl
)) {
498 purgeEntriesByUrl(req
, hdrUrl
);
500 if (absUrl
!= NULL
) {
505 // some HTTP methods should purge matching cache entries
507 ServerStateData::maybePurgeOthers()
509 // only some HTTP methods should purge matching cache entries
510 if (!request
->method
.purgesOthers())
513 // and probably only if the response was successful
514 if (theFinalReply
->sline
.status
>= 400)
517 // XXX: should we use originalRequest() here?
518 const char *reqUrl
= urlCanonical(request
);
519 debugs(88, 5, "maybe purging due to " << RequestMethodStr(request
->method
) << ' ' << reqUrl
);
520 purgeEntriesByUrl(request
, reqUrl
);
521 purgeEntriesByHeader(request
, reqUrl
, theFinalReply
, HDR_LOCATION
);
522 purgeEntriesByHeader(request
, reqUrl
, theFinalReply
, HDR_CONTENT_LOCATION
);
525 /// called when we have final (possibly adapted) reply headers; kids extend
527 ServerStateData::haveParsedReplyHeaders()
534 ServerStateData::originalRequest()
540 /// Initiate an asynchronous adaptation transaction which will call us back.
542 ServerStateData::startAdaptation(const Adaptation::ServiceGroupPointer
&group
, HttpRequest
*cause
)
544 debugs(11, 5, "ServerStateData::startAdaptation() called");
545 // check whether we should be sending a body as well
546 // start body pipe to feed ICAP transaction if needed
547 assert(!virginBodyDestination
);
548 HttpReply
*vrep
= virginReply();
549 assert(!vrep
->body_pipe
);
551 if (vrep
->expectingBody(cause
->method
, size
) && size
) {
552 virginBodyDestination
= new BodyPipe(this);
553 vrep
->body_pipe
= virginBodyDestination
;
554 debugs(93, 6, HERE
<< "will send virgin reply body to " <<
555 virginBodyDestination
<< "; size: " << size
);
557 virginBodyDestination
->setBodySize(size
);
560 adaptedHeadSource
= initiateAdaptation(
561 new Adaptation::Iterator(vrep
, cause
, group
));
562 startedAdaptation
= initiated(adaptedHeadSource
);
563 Must(startedAdaptation
);
566 // properly cleans up ICAP-related state
567 // may be called multiple times
568 void ServerStateData::cleanAdaptation()
570 debugs(11,5, HERE
<< "cleaning ICAP; ACL: " << adaptationAccessCheckPending
);
572 if (virginBodyDestination
!= NULL
)
573 stopProducingFor(virginBodyDestination
, false);
575 announceInitiatorAbort(adaptedHeadSource
);
577 if (adaptedBodySource
!= NULL
)
578 stopConsumingFrom(adaptedBodySource
);
580 if (!adaptationAccessCheckPending
) // we cannot cancel a pending callback
581 assert(doneWithAdaptation()); // make sure the two methods are in sync
585 ServerStateData::doneWithAdaptation() const
587 return !adaptationAccessCheckPending
&&
588 !virginBodyDestination
&& !adaptedHeadSource
&& !adaptedBodySource
;
591 // sends virgin reply body to ICAP, buffering excesses if needed
593 ServerStateData::adaptVirginReplyBody(const char *data
, ssize_t len
)
595 assert(startedAdaptation
);
597 if (!virginBodyDestination
) {
598 debugs(11,3, HERE
<< "ICAP does not want more virgin body");
602 // grow overflow area if already overflowed
603 if (responseBodyBuffer
) {
604 responseBodyBuffer
->append(data
, len
);
605 data
= responseBodyBuffer
->content();
606 len
= responseBodyBuffer
->contentSize();
609 const ssize_t putSize
= virginBodyDestination
->putMoreData(data
, len
);
613 // if we had overflow area, shrink it as necessary
614 if (responseBodyBuffer
) {
615 if (putSize
== responseBodyBuffer
->contentSize()) {
616 delete responseBodyBuffer
;
617 responseBodyBuffer
= NULL
;
619 responseBodyBuffer
->consume(putSize
);
624 // if we did not have an overflow area, create it as needed
626 assert(!responseBodyBuffer
);
627 responseBodyBuffer
= new MemBuf
;
628 responseBodyBuffer
->init(4096, SQUID_TCP_SO_RCVBUF
* 10);
629 responseBodyBuffer
->append(data
, len
);
633 // can supply more virgin response body data
635 ServerStateData::noteMoreBodySpaceAvailable(BodyPipe::Pointer
)
637 if (responseBodyBuffer
) {
638 addVirginReplyBody(NULL
, 0); // kick the buffered fragment alive again
639 if (completed
&& !responseBodyBuffer
) {
644 maybeReadVirginBody();
647 // the consumer of our virgin response body aborted
649 ServerStateData::noteBodyConsumerAborted(BodyPipe::Pointer
)
651 stopProducingFor(virginBodyDestination
, false);
653 // do not force closeServer here in case we need to bypass AdaptationQueryAbort
655 if (doneWithAdaptation()) // we may still be receiving adapted response
656 handleAdaptationCompleted();
659 // received adapted response headers (body may follow)
661 ServerStateData::noteAdaptationAnswer(const Adaptation::Answer
&answer
)
663 clearAdaptation(adaptedHeadSource
); // we do not expect more messages
665 switch (answer
.kind
) {
666 case Adaptation::Answer::akForward
:
667 handleAdaptedHeader(answer
.message
);
670 case Adaptation::Answer::akBlock
:
671 handleAdaptationBlocked(answer
);
674 case Adaptation::Answer::akError
:
675 handleAdaptationAborted(!answer
.final
);
681 ServerStateData::handleAdaptedHeader(HttpMsg
*msg
)
683 if (abortOnBadEntry("entry went bad while waiting for adapted headers")) {
684 // If the adapted response has a body, the ICAP side needs to know
685 // that nobody will consume that body. We will be destroyed upon
686 // return. Tell the ICAP side that it is on its own.
687 HttpReply
*rep
= dynamic_cast<HttpReply
*>(msg
);
689 if (rep
->body_pipe
!= NULL
)
690 rep
->body_pipe
->expectNoConsumption();
695 HttpReply
*rep
= dynamic_cast<HttpReply
*>(msg
);
697 debugs(11,5, HERE
<< this << " setting adapted reply to " << rep
);
700 assert(!adaptedBodySource
);
701 if (rep
->body_pipe
!= NULL
) {
702 // subscribe to receive adapted body
703 adaptedBodySource
= rep
->body_pipe
;
704 // assume that ICAP does not auto-consume on failures
705 assert(adaptedBodySource
->setConsumerIfNotLate(this));
708 if (doneWithAdaptation()) // we may still be sending virgin response
709 handleAdaptationCompleted();
713 // more adapted response body is available
715 ServerStateData::handleMoreAdaptedBodyAvailable()
717 const size_t contentSize
= adaptedBodySource
->buf().contentSize();
719 debugs(11,5, HERE
<< "consuming " << contentSize
<< " bytes of adapted " <<
720 "response body at offset " << adaptedBodySource
->consumedSize());
722 if (abortOnBadEntry("entry refuses adapted body"))
726 BodyPipeCheckout
bpc(*adaptedBodySource
);
727 const StoreIOBuffer
ioBuf(&bpc
.buf
, currentOffset
);
728 currentOffset
+= bpc
.buf
.size
;
730 bpc
.buf
.consume(contentSize
);
734 // the entire adapted response body was produced, successfully
736 ServerStateData::handleAdaptedBodyProductionEnded()
738 stopConsumingFrom(adaptedBodySource
);
740 if (abortOnBadEntry("entry went bad while waiting for adapted body eof"))
743 handleAdaptationCompleted();
746 // premature end of the adapted response body
747 void ServerStateData::handleAdaptedBodyProducerAborted()
749 stopConsumingFrom(adaptedBodySource
);
750 handleAdaptationAborted();
753 // common part of noteAdaptationAnswer and handleAdaptedBodyProductionEnded
755 ServerStateData::handleAdaptationCompleted()
757 debugs(11,5, HERE
<< "handleAdaptationCompleted");
760 // We stop reading origin response because we have no place to put it and
761 // cannot use it. If some origin servers do not like that or if we want to
762 // reuse more pconns, we can add code to discard unneeded origin responses.
763 if (!doneWithServer()) {
764 debugs(11,3, HERE
<< "closing origin conn due to ICAP completion");
768 completeForwarding();
773 // common part of noteAdaptation*Aborted and noteBodyConsumerAborted methods
775 ServerStateData::handleAdaptationAborted(bool bypassable
)
777 debugs(11,5, HERE
<< "handleAdaptationAborted; bypassable: " << bypassable
<<
778 ", entry empty: " << entry
->isEmpty());
780 if (abortOnBadEntry("entry went bad while ICAP aborted"))
783 // TODO: bypass if possible
785 if (entry
->isEmpty()) {
786 debugs(11,9, HERE
<< "creating ICAP error entry after ICAP failure");
787 ErrorState
*err
= errorCon(ERR_ICAP_FAILURE
, HTTP_INTERNAL_SERVER_ERROR
, request
);
788 err
->xerrno
= ERR_DETAIL_ICAP_RESPMOD_EARLY
;
790 fwd
->dontRetry(true);
791 } else if (request
) { // update logged info directly
792 request
->detailError(ERR_ICAP_FAILURE
, ERR_DETAIL_ICAP_RESPMOD_LATE
);
795 abortTransaction("ICAP failure");
798 // adaptation service wants us to deny HTTP client access to this response
800 ServerStateData::handleAdaptationBlocked(const Adaptation::Answer
&answer
)
802 debugs(11,5, HERE
<< answer
.ruleId
);
804 if (abortOnBadEntry("entry went bad while ICAP aborted"))
807 if (!entry
->isEmpty()) { // too late to block (should not really happen)
809 request
->detailError(ERR_ICAP_FAILURE
, ERR_DETAIL_RESPMOD_BLOCK_LATE
);
810 abortTransaction("late adaptation block");
814 debugs(11,7, HERE
<< "creating adaptation block response");
817 aclGetDenyInfoPage(&Config
.denyInfoList
, answer
.ruleId
.termedBuf(), 1);
818 if (page_id
== ERR_NONE
)
819 page_id
= ERR_ACCESS_DENIED
;
821 ErrorState
*err
= errorCon(page_id
, HTTP_FORBIDDEN
, request
);
822 err
->xerrno
= ERR_DETAIL_RESPMOD_BLOCK_EARLY
;
824 fwd
->dontRetry(true);
826 abortTransaction("timely adaptation block");
830 ServerStateData::adaptationAclCheckDone(Adaptation::ServiceGroupPointer group
)
832 adaptationAccessCheckPending
= false;
834 if (abortOnBadEntry("entry went bad while waiting for ICAP ACL check"))
837 // TODO: Should nonICAP and postICAP path check this on the server-side?
838 // That check now only happens on client-side, in processReplyAccess().
839 if (virginReply()->expectedBodyTooLarge(*request
)) {
840 sendBodyIsTooLargeError();
843 // TODO: Should we check receivedBodyTooLarge on the server-side as well?
846 debugs(11,3, HERE
<< "no adapation needed");
847 setFinalReply(virginReply());
852 startAdaptation(group
, originalRequest());
857 ServerStateData::adaptationAclCheckDoneWrapper(Adaptation::ServiceGroupPointer group
, void *data
)
859 ServerStateData
*state
= (ServerStateData
*)data
;
860 state
->adaptationAclCheckDone(group
);
865 ServerStateData::sendBodyIsTooLargeError()
867 ErrorState
*err
= errorCon(ERR_TOO_BIG
, HTTP_FORBIDDEN
, request
);
870 fwd
->dontRetry(true);
871 abortTransaction("Virgin body too large.");
874 // TODO: when HttpStateData sends all errors to ICAP,
875 // we should be able to move this at the end of setVirginReply().
877 ServerStateData::adaptOrFinalizeReply()
880 // TODO: merge with client side and return void to hide the on/off logic?
881 // The callback can be called with a NULL service if adaptation is off.
882 adaptationAccessCheckPending
= Adaptation::AccessCheck::Start(
883 Adaptation::methodRespmod
, Adaptation::pointPreCache
,
884 originalRequest(), virginReply(), adaptationAclCheckDoneWrapper
, this);
885 debugs(11,5, HERE
<< "adaptationAccessCheckPending=" << adaptationAccessCheckPending
);
886 if (adaptationAccessCheckPending
)
890 setFinalReply(virginReply());
893 /// initializes bodyBytesRead stats if needed and applies delta
895 ServerStateData::adjustBodyBytesRead(const int64_t delta
)
897 int64_t &bodyBytesRead
= originalRequest()->hier
.bodyBytesRead
;
899 // if we got here, do not log a dash even if we got nothing from the server
900 if (bodyBytesRead
< 0)
903 bodyBytesRead
+= delta
; // supports negative and zero deltas
905 // check for overflows ("infinite" response?) and undeflows (a bug)
906 Must(bodyBytesRead
>= 0);
910 ServerStateData::addVirginReplyBody(const char *data
, ssize_t len
)
912 adjustBodyBytesRead(len
);
915 assert(!adaptationAccessCheckPending
); // or would need to buffer while waiting
916 if (startedAdaptation
) {
917 adaptVirginReplyBody(data
, len
);
921 storeReplyBody(data
, len
);
924 // writes virgin or adapted reply body to store
926 ServerStateData::storeReplyBody(const char *data
, ssize_t len
)
928 // write even if len is zero to push headers towards the client side
929 entry
->write (StoreIOBuffer(len
, currentOffset
, (char*)data
));
931 currentOffset
+= len
;
934 size_t ServerStateData::replyBodySpace(const MemBuf
&readBuf
,
935 const size_t minSpace
) const
937 size_t space
= readBuf
.spaceSize(); // available space w/o heroic measures
938 if (space
< minSpace
) {
939 const size_t maxSpace
= readBuf
.potentialSpaceSize(); // absolute best
940 space
= min(minSpace
, maxSpace
); // do not promise more than asked
944 if (responseBodyBuffer
) {
945 return 0; // Stop reading if already overflowed waiting for ICAP to catch up
948 if (virginBodyDestination
!= NULL
) {
950 * BodyPipe buffer has a finite size limit. We
951 * should not read more data from the network than will fit
952 * into the pipe buffer or we _lose_ what did not fit if
953 * the response ends sooner that BodyPipe frees up space:
954 * There is no code to keep pumping data into the pipe once
955 * response ends and serverComplete() is called.
957 * If the pipe is totally full, don't register the read handler.
958 * The BodyPipe will call our noteMoreBodySpaceAvailable() method
959 * when it has free space again.
961 size_t adaptation_space
=
962 virginBodyDestination
->buf().potentialSpaceSize();
964 debugs(11,9, "ServerStateData may read up to min(" <<
965 adaptation_space
<< ", " << space
<< ") bytes");
967 if (adaptation_space
< space
)
968 space
= adaptation_space
;