5 * DEBUG: section 11 Hypertext Transfer Protocol (HTTP)
6 * AUTHOR: Harvest Derived
8 * SQUID Web Proxy Cache http://www.squid-cache.org/
9 * ----------------------------------------------------------
11 * Squid is the result of efforts by numerous individuals from
12 * the Internet community; see the CONTRIBUTORS file for full
13 * details. Many organizations have provided support for Squid's
14 * development; see the SPONSORS file for full details. Squid is
15 * Copyrighted (C) 2001 by the Regents of the University of
16 * California; see the COPYRIGHT file for full details. Squid
17 * incorporates software developed and/or copyrighted by other
18 * sources; see the CREDITS file for full details.
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 2 of the License, or
23 * (at your option) any later version.
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with this program; if not, write to the Free Software
32 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
37 * Anonymizing patch by lutz@as-node.jena.thur.de
38 * have a look into http-anon.c to get more informations.
43 #include "acl/FilledChecklist.h"
44 #include "auth/UserRequest.h"
46 #include "DelayPools.h"
48 #include "errorpage.h"
51 #include "HttpHdrContRange.h"
52 #include "HttpHdrSc.h"
53 #include "HttpHdrScTarget.h"
54 #include "HttpReply.h"
55 #include "HttpRequest.h"
57 #include "MemObject.h"
60 #include "SquidTime.h"
62 #include "TextException.h"
65 #define SQUID_ENTER_THROWING_CODE() try {
66 #define SQUID_EXIT_THROWING_CODE(status) \
69 catch (const std::exception &e) { \
70 debugs (11, 1, "Exception error:" << e.what()); \
74 CBDATA_CLASS_INIT(HttpStateData
);
76 static const char *const crlf
= "\r\n";
78 static void httpMaybeRemovePublic(StoreEntry
*, http_status
);
79 static void copyOneHeaderFromClientsideRequestToUpstreamRequest(const HttpHeaderEntry
*e
, const String strConnection
, HttpRequest
* request
, const HttpRequest
* orig_request
,
80 HttpHeader
* hdr_out
, const int we_do_ranges
, const http_state_flags
);
82 HttpStateData::HttpStateData(FwdState
*theFwdState
) : AsyncJob("HttpStateData"), ServerStateData(theFwdState
),
83 lastChunk(0), header_bytes_read(0), reply_bytes_read(0),
84 body_bytes_truncated(0), httpChunkDecoder(NULL
)
86 debugs(11,5,HERE
<< "HttpStateData " << this << " created");
87 ignoreCacheControl
= false;
88 surrogateNoStore
= false;
92 orig_request
= HTTPMSGLOCK(fwd
->request
);
94 // reset peer response time stats for %<pt
95 orig_request
->hier
.peer_http_request_sent
.tv_sec
= 0;
96 orig_request
->hier
.peer_http_request_sent
.tv_usec
= 0;
99 _peer
= fwd
->servers
->_peer
; /* might be NULL */
104 if (_peer
->options
.originserver
)
105 url
= orig_request
->urlpath
.termedBuf();
109 HttpRequest
* proxy_req
= new HttpRequest(orig_request
->method
,
110 orig_request
->protocol
, url
);
112 proxy_req
->SetHost(_peer
->host
);
114 proxy_req
->port
= _peer
->http_port
;
116 proxy_req
->flags
= orig_request
->flags
;
118 proxy_req
->lastmod
= orig_request
->lastmod
;
120 proxy_req
->flags
.proxying
= 1;
122 HTTPMSGUNLOCK(request
);
124 request
= HTTPMSGLOCK(proxy_req
);
127 * This NEIGHBOR_PROXY_ONLY check probably shouldn't be here.
128 * We might end up getting the object from somewhere else if,
129 * for example, the request to this neighbor fails.
131 if (_peer
->options
.proxy_only
)
132 entry
->releaseRequest();
136 entry
->setNoDelay(_peer
->options
.no_delay
);
142 * register the handler to free HTTP state data when the FD closes
144 typedef CommCbMemFunT
<HttpStateData
, CommCloseCbParams
> Dialer
;
145 closeHandler
= asyncCall(9, 5, "httpStateData::httpStateConnClosed",
146 Dialer(this,&HttpStateData::httpStateConnClosed
));
147 comm_add_close_handler(fd
, closeHandler
);
150 HttpStateData::~HttpStateData()
153 * don't forget that ~ServerStateData() gets called automatically
156 if (!readBuf
->isNull())
161 if (httpChunkDecoder
)
162 delete httpChunkDecoder
;
164 HTTPMSGUNLOCK(orig_request
);
166 debugs(11,5, HERE
<< "HttpStateData " << this << " destroyed; FD " << fd
);
170 HttpStateData::dataDescriptor() const
176 httpStateFree(int fd, void *data)
178 HttpStateData *httpState = static_cast<HttpStateData *>(data);
179 debugs(11, 5, "httpStateFree: FD " << fd << ", httpState=" << data);
184 HttpStateData::httpStateConnClosed(const CommCloseCbParams
¶ms
)
186 debugs(11, 5, "httpStateFree: FD " << params
.fd
<< ", httpState=" << params
.data
);
187 deleteThis("HttpStateData::httpStateConnClosed");
191 httpCachable(const HttpRequestMethod
& method
)
193 /* GET and HEAD are cachable. Others are not. */
195 // TODO: replase to HttpRequestMethod::isCachable() ?
196 if (method
!= METHOD_GET
&& method
!= METHOD_HEAD
)
204 HttpStateData::httpTimeout(const CommTimeoutCbParams
¶ms
)
206 debugs(11, 4, "httpTimeout: FD " << fd
<< ": '" << entry
->url() << "'" );
208 if (entry
->store_status
== STORE_PENDING
) {
209 fwd
->fail(errorCon(ERR_READ_TIMEOUT
, HTTP_GATEWAY_TIMEOUT
, fwd
->request
));
216 httpMaybeRemovePublic(StoreEntry
* e
, http_status status
)
222 if (!EBIT_TEST(e
->flags
, KEY_PRIVATE
))
229 case HTTP_NON_AUTHORITATIVE_INFORMATION
:
231 case HTTP_MULTIPLE_CHOICES
:
233 case HTTP_MOVED_PERMANENTLY
:
235 case HTTP_MOVED_TEMPORARILY
:
246 case HTTP_METHOD_NOT_ALLOWED
:
253 case HTTP_UNAUTHORIZED
:
263 * Any 2xx response should eject previously cached entities...
266 if (status
>= 200 && status
< 300)
274 if (!remove
&& !forbidden
)
279 if (e
->mem_obj
->request
)
280 pe
= storeGetPublicByRequest(e
->mem_obj
->request
);
282 pe
= storeGetPublic(e
->mem_obj
->url
, e
->mem_obj
->method
);
287 neighborsHtcpClear(e
, NULL
, e
->mem_obj
->request
, e
->mem_obj
->method
, HTCP_CLR_INVALIDATION
);
293 * Also remove any cached HEAD response in case the object has
296 if (e
->mem_obj
->request
)
297 pe
= storeGetPublicByRequestMethod(e
->mem_obj
->request
, METHOD_HEAD
);
299 pe
= storeGetPublic(e
->mem_obj
->url
, METHOD_HEAD
);
304 neighborsHtcpClear(e
, NULL
, e
->mem_obj
->request
, HttpRequestMethod(METHOD_HEAD
), HTCP_CLR_INVALIDATION
);
311 HttpStateData::processSurrogateControl(HttpReply
*reply
)
313 if (request
->flags
.accelerated
&& reply
->surrogate_control
) {
314 HttpHdrScTarget
*sctusable
= httpHdrScGetMergedTarget(reply
->surrogate_control
, Config
.Accel
.surrogate_id
);
317 if (EBIT_TEST(sctusable
->mask
, SC_NO_STORE
) ||
318 (Config
.onoff
.surrogate_is_remote
319 && EBIT_TEST(sctusable
->mask
, SC_NO_STORE_REMOTE
))) {
320 surrogateNoStore
= true;
321 entry
->makePrivate();
324 /* The HttpHeader logic cannot tell if the header it's parsing is a reply to an
325 * accelerated request or not...
326 * Still, this is an abstraction breach. - RC
328 if (sctusable
->max_age
!= -1) {
329 if (sctusable
->max_age
< sctusable
->max_stale
)
330 reply
->expires
= reply
->date
+ sctusable
->max_age
;
332 reply
->expires
= reply
->date
+ sctusable
->max_stale
;
334 /* And update the timestamps */
335 entry
->timestampsSet();
338 /* We ignore cache-control directives as per the Surrogate specification */
339 ignoreCacheControl
= true;
341 httpHdrScTargetDestroy(sctusable
);
347 HttpStateData::cacheableReply()
349 HttpReply
const *rep
= finalReply();
350 HttpHeader
const *hdr
= &rep
->header
;
351 const int cc_mask
= (rep
->cache_control
) ? rep
->cache_control
->mask
: 0;
355 const refresh_t
*R
= NULL
;
357 /* This strange looking define first looks up the refresh pattern
358 * and then checks if the specified flag is set. The main purpose
359 * of this is to simplify the refresh pattern lookup and HTTP_VIOLATIONS
362 #define REFRESH_OVERRIDE(flag) \
363 ((R = (R ? R : refreshLimits(entry->mem_obj->url))) , \
364 (R && R->flags.flag))
366 #define REFRESH_OVERRIDE(flag) 0
369 if (surrogateNoStore
)
372 if (!ignoreCacheControl
) {
373 if (EBIT_TEST(cc_mask
, CC_PRIVATE
)) {
374 if (!REFRESH_OVERRIDE(ignore_private
))
378 if (EBIT_TEST(cc_mask
, CC_NO_CACHE
)) {
379 if (!REFRESH_OVERRIDE(ignore_no_cache
))
383 if (EBIT_TEST(cc_mask
, CC_NO_STORE
)) {
384 if (!REFRESH_OVERRIDE(ignore_no_store
))
389 if (request
->flags
.auth
|| request
->flags
.auth_sent
) {
391 * Responses to requests with authorization may be cached
392 * only if a Cache-Control: public reply header is present.
393 * RFC 2068, sec 14.9.4
396 if (!EBIT_TEST(cc_mask
, CC_PUBLIC
)) {
397 if (!REFRESH_OVERRIDE(ignore_auth
))
402 /* Pragma: no-cache in _replies_ is not documented in HTTP,
403 * but servers like "Active Imaging Webcast/2.0" sure do use it */
404 if (hdr
->has(HDR_PRAGMA
)) {
405 String s
= hdr
->getList(HDR_PRAGMA
);
406 const int no_cache
= strListIsMember(&s
, "no-cache", ',');
410 if (!REFRESH_OVERRIDE(ignore_no_cache
))
416 * The "multipart/x-mixed-replace" content type is used for
417 * continuous push replies. These are generally dynamic and
418 * probably should not be cachable
420 if ((v
= hdr
->getStr(HDR_CONTENT_TYPE
)))
421 if (!strncasecmp(v
, "multipart/x-mixed-replace", 25))
424 switch (rep
->sline
.status
) {
425 /* Responses that are cacheable */
429 case HTTP_NON_AUTHORITATIVE_INFORMATION
:
431 case HTTP_MULTIPLE_CHOICES
:
433 case HTTP_MOVED_PERMANENTLY
:
437 * Don't cache objects that need to be refreshed on next request,
438 * unless we know how to refresh it.
441 if (!refreshIsCachable(entry
)) {
442 debugs(22, 3, "refreshIsCachable() returned non-cacheable..");
446 /* don't cache objects from peers w/o LMT, Date, or Expires */
447 /* check that is it enough to check headers @?@ */
450 else if (rep
->last_modified
> -1)
455 /* @?@ (here and 302): invalid expires header compiles to squid_curtime */
456 else if (rep
->expires
> -1)
464 /* Responses that only are cacheable if the server says so */
466 case HTTP_MOVED_TEMPORARILY
:
467 case HTTP_TEMPORARY_REDIRECT
:
468 if (rep
->expires
> rep
->date
&& rep
->date
> 0)
476 /* Errors can be negatively cached */
478 case HTTP_NO_CONTENT
:
482 case HTTP_BAD_REQUEST
:
488 case HTTP_METHOD_NOT_ALLOWED
:
490 case HTTP_REQUEST_URI_TOO_LARGE
:
492 case HTTP_INTERNAL_SERVER_ERROR
:
494 case HTTP_NOT_IMPLEMENTED
:
496 case HTTP_BAD_GATEWAY
:
498 case HTTP_SERVICE_UNAVAILABLE
:
500 case HTTP_GATEWAY_TIMEOUT
:
506 /* Some responses can never be cached */
508 case HTTP_PARTIAL_CONTENT
: /* Not yet supported */
512 case HTTP_NOT_MODIFIED
:
514 case HTTP_UNAUTHORIZED
:
516 case HTTP_PROXY_AUTHENTICATION_REQUIRED
:
518 case HTTP_INVALID_HEADER
: /* Squid header parsing error */
520 case HTTP_HEADER_TOO_LARGE
:
522 case HTTP_PAYMENT_REQUIRED
:
523 case HTTP_NOT_ACCEPTABLE
:
524 case HTTP_REQUEST_TIMEOUT
:
526 case HTTP_LENGTH_REQUIRED
:
527 case HTTP_PRECONDITION_FAILED
:
528 case HTTP_REQUEST_ENTITY_TOO_LARGE
:
529 case HTTP_UNSUPPORTED_MEDIA_TYPE
:
530 case HTTP_UNPROCESSABLE_ENTITY
:
532 case HTTP_FAILED_DEPENDENCY
:
533 case HTTP_INSUFFICIENT_STORAGE
:
534 case HTTP_REQUESTED_RANGE_NOT_SATISFIABLE
:
535 case HTTP_EXPECTATION_FAILED
:
540 /* RFC 2616 section 6.1.1: an unrecognized response MUST NOT be cached. */
541 debugs (11, 3, HERE
<< "Unknown HTTP status code " << rep
->sline
.status
<< ". Not cacheable.");
553 * For Vary, store the relevant request headers as
554 * virtual headers in the reply
555 * Returns false if the variance cannot be stored
558 httpMakeVaryMark(HttpRequest
* request
, HttpReply
const * reply
)
561 const char *pos
= NULL
;
568 vary
= reply
->header
.getList(HDR_VARY
);
570 while (strListGetItem(&vary
, ',', &item
, &ilen
, &pos
)) {
571 char *name
= (char *)xmalloc(ilen
+ 1);
572 xstrncpy(name
, item
, ilen
+ 1);
575 if (strcmp(name
, "*") == 0) {
576 /* Can not handle "Vary: *" withtout ETag support */
582 strListAdd(&vstr
, name
, ',');
583 hdr
= request
->header
.getByName(name
);
585 value
= hdr
.termedBuf();
588 value
= rfc1738_escape_part(value
);
589 vstr
.append("=\"", 2);
591 vstr
.append("\"", 1);
598 #if X_ACCELERATOR_VARY
601 vary
= reply
->header
.getList(HDR_X_ACCELERATOR_VARY
);
603 while (strListGetItem(&vary
, ',', &item
, &ilen
, &pos
)) {
604 char *name
= (char *)xmalloc(ilen
+ 1);
605 xstrncpy(name
, item
, ilen
+ 1);
607 strListAdd(&vstr
, name
, ',');
608 hdr
= request
->header
.getByName(name
);
610 value
= hdr
.termedBuf();
613 value
= rfc1738_escape_part(value
);
614 vstr
.append("=\"", 2);
616 vstr
.append("\"", 1);
625 debugs(11, 3, "httpMakeVaryMark: " << vstr
);
626 return vstr
.termedBuf();
630 HttpStateData::keepaliveAccounting(HttpReply
*reply
)
634 _peer
->stats
.n_keepalives_sent
++;
636 if (reply
->keep_alive
) {
638 _peer
->stats
.n_keepalives_recv
++;
640 if (Config
.onoff
.detect_broken_server_pconns
641 && reply
->bodySize(request
->method
) == -1 && !flags
.chunked
) {
642 debugs(11, 1, "keepaliveAccounting: Impossible keep-alive header from '" << entry
->url() << "'" );
643 // debugs(11, 2, "GOT HTTP REPLY HDR:\n---------\n" << readBuf->content() << "\n----------" );
644 flags
.keepalive_broken
= 1;
650 HttpStateData::checkDateSkew(HttpReply
*reply
)
652 if (reply
->date
> -1 && !_peer
) {
653 int skew
= abs((int)(reply
->date
- squid_curtime
));
656 debugs(11, 3, "" << request
->GetHost() << "'s clock is skewed by " << skew
<< " seconds!");
661 * This creates the error page itself.. its likely
662 * that the forward ported reply header max size patch
663 * generates non http conformant error pages - in which
664 * case the errors where should be 'BAD_GATEWAY' etc
667 HttpStateData::processReplyHeader()
669 /** Creates a blank header. If this routine is made incremental, this will not do */
670 Ctx ctx
= ctx_enter(entry
->mem_obj
->url
);
671 debugs(11, 3, "processReplyHeader: key '" << entry
->getMD5Text() << "'");
673 assert(!flags
.headers_parsed
);
675 http_status error
= HTTP_STATUS_NONE
;
677 HttpReply
*newrep
= new HttpReply
;
678 const bool parsed
= newrep
->parse(readBuf
, eof
, &error
);
680 if (!parsed
&& readBuf
->contentSize() > 5 && strncmp(readBuf
->content(), "HTTP/", 5) != 0 && strncmp(readBuf
->content(), "ICY", 3) != 0) {
682 HttpReply
*tmprep
= new HttpReply
;
683 tmprep
->setHeaders(HTTP_OK
, "Gatewaying", NULL
, -1, -1, -1);
684 tmprep
->header
.putExt("X-Transformed-From", "HTTP/0.9");
686 newrep
->parse(mb
, eof
, &error
);
689 if (!parsed
&& error
> 0) { // unrecoverable parsing error
690 debugs(11, 3, "processReplyHeader: Non-HTTP-compliant header: '" << readBuf
->content() << "'");
691 flags
.headers_parsed
= 1;
692 newrep
->sline
.version
= HttpVersion(1,0);
693 newrep
->sline
.status
= error
;
694 HttpReply
*vrep
= setVirginReply(newrep
);
695 entry
->replaceHttpReply(vrep
);
700 if (!parsed
) { // need more data
708 debugs(11, 9, "GOT HTTP REPLY HDR:\n---------\n" << readBuf
->content() << "\n----------");
710 header_bytes_read
= headersEnd(readBuf
->content(), readBuf
->contentSize());
711 readBuf
->consume(header_bytes_read
);
714 /* Skip 1xx messages for now. Advertised in Via as an internal 1.0 hop */
715 if (newrep
->sline
.protocol
== PROTO_HTTP
&& newrep
->sline
.status
>= 100 && newrep
->sline
.status
< 200) {
718 /* When HTTP/1.1 check if the client is expecting a 1xx reply and maybe pass it on */
719 if (orig_request
->header
.has(HDR_EXPECT
)) {
720 // TODO: pass to the client anyway?
724 debugs(11, 2, HERE
<< "1xx headers consume " << header_bytes_read
<< " bytes header.");
725 header_bytes_read
= 0;
726 if (reply_bytes_read
> 0)
727 debugs(11, 2, HERE
<< "1xx headers consume " << reply_bytes_read
<< " bytes reply.");
728 reply_bytes_read
= 0;
730 processReplyHeader();
735 if (newrep
->sline
.protocol
== PROTO_HTTP
&& newrep
->header
.hasListMember(HDR_TRANSFER_ENCODING
, "chunked", ',')) {
737 httpChunkDecoder
= new ChunkedCodingParser
;
740 if (!peerSupportsConnectionPinning())
741 orig_request
->flags
.connection_auth_disabled
= 1;
743 HttpReply
*vrep
= setVirginReply(newrep
);
744 flags
.headers_parsed
= 1;
746 keepaliveAccounting(vrep
);
750 processSurrogateControl (vrep
);
752 /** \todo IF the reply is a 1.0 reply, AND it has a Connection: Header
753 * Parse the header and remove all referenced headers
756 orig_request
->hier
.peer_reply_status
= newrep
->sline
.status
;
763 * returns true if the peer can support connection pinning
765 bool HttpStateData::peerSupportsConnectionPinning() const
767 const HttpReply
*rep
= entry
->mem_obj
->getReply();
768 const HttpHeader
*hdr
= &rep
->header
;
775 /*If this peer does not support connection pinning (authenticated
776 connections) return false
778 if (!_peer
->connection_auth
)
781 /*The peer supports connection pinning and the http reply status
782 is not unauthorized, so the related connection can be pinned
784 if (rep
->sline
.status
!= HTTP_UNAUTHORIZED
)
787 /*The server respond with HTTP_UNAUTHORIZED and the peer configured
788 with "connection-auth=on" we know that the peer supports pinned
791 if (_peer
->connection_auth
== 1)
794 /*At this point peer has configured with "connection-auth=auto"
795 parameter so we need some extra checks to decide if we are going
796 to allow pinned connections or not
799 /*if the peer configured with originserver just allow connection
800 pinning (squid 2.6 behaviour)
802 if (_peer
->options
.originserver
)
805 /*if the connections it is already pinned it is OK*/
806 if (request
->flags
.pinned
)
809 /*Allow pinned connections only if the Proxy-support header exists in
810 reply and has in its list the "Session-Based-Authentication"
811 which means that the peer supports connection pinning.
813 if (!hdr
->has(HDR_PROXY_SUPPORT
))
816 header
= hdr
->getStrOrList(HDR_PROXY_SUPPORT
);
817 /* XXX This ought to be done in a case-insensitive manner */
818 rc
= (strstr(header
.termedBuf(), "Session-Based-Authentication") != NULL
);
823 // Called when we parsed (and possibly adapted) the headers but
824 // had not starting storing (a.k.a., sending) the body yet.
826 HttpStateData::haveParsedReplyHeaders()
828 ServerStateData::haveParsedReplyHeaders();
830 Ctx ctx
= ctx_enter(entry
->mem_obj
->url
);
831 HttpReply
*rep
= finalReply();
833 if (rep
->sline
.status
== HTTP_PARTIAL_CONTENT
&&
835 currentOffset
= rep
->content_range
->spec
.offset
;
837 entry
->timestampsSet();
839 /* Check if object is cacheable or not based on reply code */
840 debugs(11, 3, "haveParsedReplyHeaders: HTTP CODE: " << rep
->sline
.status
);
842 if (neighbors_do_private_keys
)
843 httpMaybeRemovePublic(entry
, rep
->sline
.status
);
845 if (rep
->header
.has(HDR_VARY
)
846 #if X_ACCELERATOR_VARY
847 || rep
->header
.has(HDR_X_ACCELERATOR_VARY
)
850 const char *vary
= httpMakeVaryMark(orig_request
, rep
);
853 entry
->makePrivate();
854 if (!fwd
->reforwardableStatus(rep
->sline
.status
))
855 EBIT_CLR(entry
->flags
, ENTRY_FWD_HDR_WAIT
);
859 entry
->mem_obj
->vary_headers
= xstrdup(vary
);
867 * If its not a reply that we will re-forward, then
868 * allow the client to get it.
870 if (!fwd
->reforwardableStatus(rep
->sline
.status
))
871 EBIT_CLR(entry
->flags
, ENTRY_FWD_HDR_WAIT
);
873 switch (cacheableReply()) {
880 entry
->makePrivate();
886 if (Config
.negativeTtl
> 0)
887 entry
->cacheNegatively();
890 entry
->makePrivate();
902 if (!ignoreCacheControl
&& rep
->cache_control
) {
903 if (EBIT_TEST(rep
->cache_control
->mask
, CC_PROXY_REVALIDATE
))
904 EBIT_SET(entry
->flags
, ENTRY_REVALIDATE
);
905 else if (EBIT_TEST(rep
->cache_control
->mask
, CC_MUST_REVALIDATE
))
906 EBIT_SET(entry
->flags
, ENTRY_REVALIDATE
);
910 headersLog(1, 0, request
->method
, rep
);
917 HttpStateData::ConnectionStatus
918 HttpStateData::statusIfComplete() const
920 const HttpReply
*rep
= virginReply();
922 * If the reply wants to close the connection, it takes precedence */
924 if (httpHeaderHasConnDir(&rep
->header
, "close"))
925 return COMPLETE_NONPERSISTENT_MSG
;
928 * If we didn't send a keep-alive request header, then this
929 * can not be a persistent connection.
931 if (!flags
.keepalive
)
932 return COMPLETE_NONPERSISTENT_MSG
;
935 * If we haven't sent the whole request then this can not be a persistent
938 if (!flags
.request_sent
) {
939 debugs(11, 1, "statusIfComplete: Request not yet fully sent \"" << RequestMethodStr(orig_request
->method
) << " " << entry
->url() << "\"" );
940 return COMPLETE_NONPERSISTENT_MSG
;
944 * What does the reply have to say about keep-alive?
948 * If the origin server (HTTP/1.0) does not send a keep-alive
949 * header, but keeps the connection open anyway, what happens?
950 * We'll return here and http.c waits for an EOF before changing
951 * store_status to STORE_OK. Combine this with ENTRY_FWD_HDR_WAIT
952 * and an error status code, and we might have to wait until
953 * the server times out the socket.
955 if (!rep
->keep_alive
)
956 return COMPLETE_NONPERSISTENT_MSG
;
958 return COMPLETE_PERSISTENT_MSG
;
961 HttpStateData::ConnectionStatus
962 HttpStateData::persistentConnStatus() const
964 debugs(11, 3, "persistentConnStatus: FD " << fd
<< " eof=" << eof
);
965 const HttpReply
*vrep
= virginReply();
966 debugs(11, 5, "persistentConnStatus: content_length=" << vrep
->content_length
);
968 /* If we haven't seen the end of reply headers, we are not done */
969 debugs(11, 5, "persistentConnStatus: flags.headers_parsed=" << flags
.headers_parsed
);
971 if (!flags
.headers_parsed
)
972 return INCOMPLETE_MSG
;
974 if (eof
) // already reached EOF
975 return COMPLETE_NONPERSISTENT_MSG
;
978 * In chunked response we do not know the content length but we are absolutely
979 * sure about the end of response, so we are calling the statusIfComplete to
980 * decide if we can be persistant
982 if (lastChunk
&& flags
.chunked
)
983 return statusIfComplete();
985 const int64_t clen
= vrep
->bodySize(request
->method
);
987 debugs(11, 5, "persistentConnStatus: clen=" << clen
);
989 /* If the body size is unknown we must wait for EOF */
991 return INCOMPLETE_MSG
;
994 * If the body size is known, we must wait until we've gotten all of it. */
997 // if (entry->mem_obj->endOffset() < vrep->content_length + vrep->hdr_sz)
998 const int64_t body_bytes_read
= reply_bytes_read
- header_bytes_read
;
999 debugs(11,5, "persistentConnStatus: body_bytes_read=" <<
1000 body_bytes_read
<< " content_length=" << vrep
->content_length
);
1002 if (body_bytes_read
< vrep
->content_length
)
1003 return INCOMPLETE_MSG
;
1005 if (body_bytes_truncated
> 0) // already read more than needed
1006 return COMPLETE_NONPERSISTENT_MSG
; // disable pconns
1010 * If there is no message body or we got it all, we can be persistent */
1011 return statusIfComplete();
1015 * This is the callback after some data has been read from the network
1019 HttpStateData::ReadReplyWrapper(int fd, char *buf, size_t len, comm_err_t flag, int xerrno, void *data)
1021 HttpStateData *httpState = static_cast<HttpStateData *>(data);
1022 assert (fd == httpState->fd);
1023 // assert(buf == readBuf->content());
1024 PROF_start(HttpStateData_readReply);
1025 httpState->readReply(len, flag, xerrno);
1026 PROF_stop(HttpStateData_readReply);
1030 /* XXX this function is too long! */
1032 HttpStateData::readReply(const CommIoCbParams
&io
)
1038 assert(fd
== io
.fd
);
1040 flags
.do_next_read
= 0;
1042 debugs(11, 5, "httpReadReply: FD " << fd
<< ": len " << len
<< ".");
1044 // Bail out early on COMM_ERR_CLOSING - close handlers will tidy up for us
1045 if (io
.flag
== COMM_ERR_CLOSING
) {
1046 debugs(11, 3, "http socket closing");
1050 if (EBIT_TEST(entry
->flags
, ENTRY_ABORTED
)) {
1051 maybeReadVirginBody();
1055 // handle I/O errors
1056 if (io
.flag
!= COMM_OK
|| len
< 0) {
1057 debugs(11, 2, "httpReadReply: FD " << fd
<< ": read failure: " << xstrerror() << ".");
1059 if (ignoreErrno(io
.xerrno
)) {
1060 flags
.do_next_read
= 1;
1063 err
= errorCon(ERR_READ_ERROR
, HTTP_BAD_GATEWAY
, fwd
->request
);
1064 err
->xerrno
= io
.xerrno
;
1066 flags
.do_next_read
= 0;
1075 readBuf
->appended(len
);
1076 reply_bytes_read
+= len
;
1079 DelayId delayId
= entry
->mem_obj
->mostBytesAllowed();
1080 delayId
.bytesIn(len
);
1083 kb_incr(&statCounter
.server
.all
.kbytes_in
, len
);
1084 kb_incr(&statCounter
.server
.http
.kbytes_in
, len
);
1085 IOStats
.Http
.reads
++;
1087 for (clen
= len
- 1, bin
= 0; clen
; bin
++)
1090 IOStats
.Http
.read_hist
[bin
]++;
1092 // update peer response time stats (%<pt)
1093 const timeval
&sent
= orig_request
->hier
.peer_http_request_sent
;
1094 orig_request
->hier
.peer_response_time
=
1095 sent
.tv_sec
? tvSubMsec(sent
, current_time
) : -1;
1099 * Here the RFC says we should ignore whitespace between replies, but we can't as
1100 * doing so breaks HTTP/0.9 replies beginning with witespace, and in addition
1101 * the response splitting countermeasures is extremely likely to trigger on this,
1102 * not allowing connection reuse in the first place.
1105 if (!flags
.headers_parsed
&& len
> 0 && fd_table
[fd
].uses
> 1) {
1106 /* Skip whitespace between replies */
1108 while (len
> 0 && xisspace(*buf
))
1109 xmemmove(buf
, buf
+ 1, len
--);
1112 /* Continue to read... */
1113 /* Timeout NOT increased. This whitespace was from previous reply */
1114 flags
.do_next_read
= 1;
1115 maybeReadVirginBody();
1122 if (len
== 0) { // reached EOF?
1124 flags
.do_next_read
= 0;
1127 if (!flags
.headers_parsed
) { // have not parsed headers yet?
1128 PROF_start(HttpStateData_processReplyHeader
);
1129 processReplyHeader();
1130 PROF_stop(HttpStateData_processReplyHeader
);
1132 if (!continueAfterParsingHeader()) // parsing error or need more data
1133 return; // TODO: send errors to ICAP
1135 adaptOrFinalizeReply();
1138 // kick more reads if needed and/or process the response body, if any
1139 PROF_start(HttpStateData_processReplyBody
);
1140 processReplyBody(); // may call serverComplete()
1141 PROF_stop(HttpStateData_processReplyBody
);
1145 \retval true if we can continue with processing the body or doing ICAP.
1148 HttpStateData::continueAfterParsingHeader()
1150 if (!flags
.headers_parsed
&& !eof
) {
1151 debugs(11, 9, HERE
<< "needs more at " << readBuf
->contentSize());
1152 flags
.do_next_read
= 1;
1153 /** \retval false If we have not finished parsing the headers and may get more data.
1154 * Schedules more reads to retrieve the missing data.
1156 maybeReadVirginBody(); // schedules all kinds of reads; TODO: rename
1160 /** If we are done with parsing, check for errors */
1162 err_type error
= ERR_NONE
;
1164 if (flags
.headers_parsed
) { // parsed headers, possibly with errors
1165 // check for header parsing errors
1166 if (HttpReply
*vrep
= virginReply()) {
1167 const http_status s
= vrep
->sline
.status
;
1168 const HttpVersion
&v
= vrep
->sline
.version
;
1169 if (s
== HTTP_INVALID_HEADER
&& v
!= HttpVersion(0,9)) {
1170 debugs(11, DBG_IMPORTANT
, "WARNING: HTTP: Invalid Response: Bad header encountered from " << entry
->url() << " AKA " << orig_request
->GetHost() << orig_request
->urlpath
.termedBuf() );
1171 error
= ERR_INVALID_RESP
;
1172 } else if (s
== HTTP_HEADER_TOO_LARGE
) {
1173 fwd
->dontRetry(true);
1174 error
= ERR_TOO_BIG
;
1176 return true; // done parsing, got reply, and no error
1179 // parsed headers but got no reply
1180 debugs(11, DBG_IMPORTANT
, "WARNING: HTTP: Invalid Response: No reply at all for " << entry
->url() << " AKA " << orig_request
->GetHost() << orig_request
->urlpath
.termedBuf() );
1181 error
= ERR_INVALID_RESP
;
1185 if (readBuf
->hasContent()) {
1186 error
= ERR_INVALID_RESP
;
1187 debugs(11, DBG_IMPORTANT
, "WARNING: HTTP: Invalid Response: Headers did not parse at all for " << entry
->url() << " AKA " << orig_request
->GetHost() << orig_request
->urlpath
.termedBuf() );
1189 error
= ERR_ZERO_SIZE_OBJECT
;
1190 debugs(11, DBG_IMPORTANT
, "WARNING: HTTP: Invalid Response: No object data received for " << entry
->url() << " AKA " << orig_request
->GetHost() << orig_request
->urlpath
.termedBuf() );
1194 assert(error
!= ERR_NONE
);
1196 fwd
->fail(errorCon(error
, HTTP_BAD_GATEWAY
, fwd
->request
));
1197 flags
.do_next_read
= 0;
1199 return false; // quit on error
1202 /** truncate what we read if we read too much so that writeReplyBody()
1203 writes no more than what we should have read */
1205 HttpStateData::truncateVirginBody()
1207 assert(flags
.headers_parsed
);
1209 HttpReply
*vrep
= virginReply();
1211 if (!vrep
->expectingBody(request
->method
, clen
) || clen
< 0)
1212 return; // no body or a body of unknown size, including chunked
1214 const int64_t body_bytes_read
= reply_bytes_read
- header_bytes_read
;
1215 if (body_bytes_read
- body_bytes_truncated
<= clen
)
1216 return; // we did not read too much or already took care of the extras
1218 if (const int64_t extras
= body_bytes_read
- body_bytes_truncated
- clen
) {
1219 // server sent more that the advertised content length
1220 debugs(11,5, HERE
<< "body_bytes_read=" << body_bytes_read
<<
1221 " clen=" << clen
<< '/' << vrep
->content_length
<<
1222 " body_bytes_truncated=" << body_bytes_truncated
<< '+' << extras
);
1224 readBuf
->truncate(extras
);
1225 body_bytes_truncated
+= extras
;
1230 * Call this when there is data from the origin server
1231 * which should be sent to either StoreEntry, or to ICAP...
1234 HttpStateData::writeReplyBody()
1236 truncateVirginBody(); // if needed
1237 const char *data
= readBuf
->content();
1238 int len
= readBuf
->contentSize();
1239 addVirginReplyBody(data
, len
);
1240 readBuf
->consume(len
);
1244 HttpStateData::decodeAndWriteReplyBody()
1246 const char *data
= NULL
;
1248 bool wasThereAnException
= false;
1249 assert(flags
.chunked
);
1250 assert(httpChunkDecoder
);
1251 SQUID_ENTER_THROWING_CODE();
1254 const bool doneParsing
= httpChunkDecoder
->parse(readBuf
,&decodedData
);
1255 len
= decodedData
.contentSize();
1256 data
=decodedData
.content();
1257 addVirginReplyBody(data
, len
);
1260 flags
.do_next_read
= 0;
1262 SQUID_EXIT_THROWING_CODE(wasThereAnException
);
1263 return wasThereAnException
;
1267 * processReplyBody has two purposes:
1268 * 1 - take the reply body data, if any, and put it into either
1269 * the StoreEntry, or give it over to ICAP.
1270 * 2 - see if we made it to the end of the response (persistent
1271 * connections and such)
1274 HttpStateData::processReplyBody()
1276 AsyncCall::Pointer call
;
1277 IpAddress client_addr
;
1278 bool ispinned
= false;
1280 if (!flags
.headers_parsed
) {
1281 flags
.do_next_read
= 1;
1282 maybeReadVirginBody();
1287 debugs(11,5, HERE
<< "adaptationAccessCheckPending=" << adaptationAccessCheckPending
);
1288 if (adaptationAccessCheckPending
)
1294 * At this point the reply headers have been parsed and consumed.
1295 * That means header content has been removed from readBuf and
1296 * it contains only body data.
1298 if (flags
.chunked
) {
1299 if (!decodeAndWriteReplyBody()) {
1300 flags
.do_next_read
= 0;
1307 if (EBIT_TEST(entry
->flags
, ENTRY_ABORTED
)) {
1309 * The above writeReplyBody() call could ABORT this entry,
1310 * in that case, the server FD should already be closed.
1311 * there's nothing for us to do.
1315 switch (persistentConnStatus()) {
1316 case INCOMPLETE_MSG
:
1317 debugs(11, 5, "processReplyBody: INCOMPLETE_MSG");
1318 /* Wait for more data or EOF condition */
1319 if (flags
.keepalive_broken
) {
1321 commSetTimeout(fd
, 10, call
);
1324 commSetTimeout(fd
, Config
.Timeout
.read
, call
);
1327 flags
.do_next_read
= 1;
1330 case COMPLETE_PERSISTENT_MSG
:
1331 debugs(11, 5, "processReplyBody: COMPLETE_PERSISTENT_MSG");
1332 /* yes we have to clear all these! */
1334 commSetTimeout(fd
, -1, call
);
1335 flags
.do_next_read
= 0;
1337 comm_remove_close_handler(fd
, closeHandler
);
1338 closeHandler
= NULL
;
1339 fwd
->unregister(fd
);
1341 if (orig_request
->flags
.spoof_client_ip
)
1342 client_addr
= orig_request
->client_addr
;
1345 if (request
->flags
.pinned
) {
1347 } else if (request
->flags
.connection_auth
&& request
->flags
.auth_sent
) {
1351 if (orig_request
->pinnedConnection() && ispinned
) {
1352 orig_request
->pinnedConnection()->pinConnection(fd
, orig_request
, _peer
,
1353 (request
->flags
.connection_auth
!= 0));
1355 fwd
->pconnPush(fd
, _peer
, request
, orig_request
->GetHost(), client_addr
);
1363 case COMPLETE_NONPERSISTENT_MSG
:
1364 debugs(11, 5, "processReplyBody: COMPLETE_NONPERSISTENT_MSG");
1369 maybeReadVirginBody();
1373 HttpStateData::maybeReadVirginBody()
1375 // we may need to grow the buffer if headers do not fit
1376 const int minRead
= flags
.headers_parsed
? 0 :1024;
1377 const int read_size
= replyBodySpace(*readBuf
, minRead
);
1379 debugs(11,9, HERE
<< (flags
.do_next_read
? "may" : "wont") <<
1380 " read up to " << read_size
<< " bytes from FD " << fd
);
1383 * why <2? Because delayAwareRead() won't actually read if
1384 * you ask it to read 1 byte. The delayed read request
1385 * just gets re-queued until the client side drains, then
1386 * the I/O thread hangs. Better to not register any read
1387 * handler until we get a notification from someone that
1388 * its okay to read again.
1393 if (flags
.do_next_read
) {
1394 flags
.do_next_read
= 0;
1395 typedef CommCbMemFunT
<HttpStateData
, CommIoCbParams
> Dialer
;
1396 entry
->delayAwareRead(fd
, readBuf
->space(read_size
), read_size
,
1397 asyncCall(11, 5, "HttpStateData::readReply",
1398 Dialer(this, &HttpStateData::readReply
)));
1403 * This will be called when request write is complete.
1406 HttpStateData::sendComplete(const CommIoCbParams
&io
)
1408 debugs(11, 5, "httpSendComplete: FD " << fd
<< ": size " << io
.size
<< ": errflag " << io
.flag
<< ".");
1409 #if URL_CHECKSUM_DEBUG
1411 entry
->mem_obj
->checkUrlChecksum();
1415 fd_bytes(fd
, io
.size
, FD_WRITE
);
1416 kb_incr(&statCounter
.server
.all
.kbytes_out
, io
.size
);
1417 kb_incr(&statCounter
.server
.http
.kbytes_out
, io
.size
);
1420 if (io
.flag
== COMM_ERR_CLOSING
)
1425 err
= errorCon(ERR_WRITE_ERROR
, HTTP_BAD_GATEWAY
, fwd
->request
);
1426 err
->xerrno
= io
.xerrno
;
1433 * Set the read timeout here because it hasn't been set yet.
1434 * We only set the read timeout after the request has been
1435 * fully written to the server-side. If we start the timeout
1436 * after connection establishment, then we are likely to hit
1437 * the timeout for POST/PUT requests that have very large
1440 typedef CommCbMemFunT
<HttpStateData
, CommTimeoutCbParams
> TimeoutDialer
;
1441 AsyncCall::Pointer timeoutCall
= asyncCall(11, 5, "HttpStateData::httpTimeout",
1442 TimeoutDialer(this,&HttpStateData::httpTimeout
));
1444 commSetTimeout(fd
, Config
.Timeout
.read
, timeoutCall
);
1446 flags
.request_sent
= 1;
1448 orig_request
->hier
.peer_http_request_sent
= current_time
;
1451 // Close the HTTP server connection. Used by serverComplete().
1453 HttpStateData::closeServer()
1455 debugs(11,5, HERE
<< "closing HTTP server FD " << fd
<< " this " << this);
1458 fwd
->unregister(fd
);
1459 comm_remove_close_handler(fd
, closeHandler
);
1460 closeHandler
= NULL
;
1467 HttpStateData::doneWithServer() const
1474 * Fixup authentication request headers for special cases
1477 httpFixupAuthentication(HttpRequest
* request
, HttpRequest
* orig_request
, const HttpHeader
* hdr_in
, HttpHeader
* hdr_out
, http_state_flags flags
)
1479 http_hdr_type header
= flags
.originpeer
? HDR_AUTHORIZATION
: HDR_PROXY_AUTHORIZATION
;
1481 /* Nothing to do unless we are forwarding to a peer */
1482 if (!request
->flags
.proxying
)
1485 /* Needs to be explicitly enabled */
1486 if (!orig_request
->peer_login
)
1489 /* Maybe already dealt with? */
1490 if (hdr_out
->has(header
))
1493 /* Nothing to do here for PASSTHRU */
1494 if (strcmp(orig_request
->peer_login
, "PASSTHRU") == 0)
1497 /* PROXYPASS is a special case, single-signon to servers with the proxy password (basic only) */
1498 if (flags
.originpeer
&& strcmp(orig_request
->peer_login
, "PROXYPASS") == 0 && hdr_in
->has(HDR_PROXY_AUTHORIZATION
)) {
1499 const char *auth
= hdr_in
->getStr(HDR_PROXY_AUTHORIZATION
);
1501 if (auth
&& strncasecmp(auth
, "basic ", 6) == 0) {
1502 hdr_out
->putStr(header
, auth
);
1507 /* Special mode to pass the username to the upstream cache */
1508 if (*orig_request
->peer_login
== '*') {
1510 const char *username
= "-";
1512 if (orig_request
->extacl_user
.size())
1513 username
= orig_request
->extacl_user
.termedBuf();
1514 else if (orig_request
->auth_user_request
)
1515 username
= orig_request
->auth_user_request
->username();
1517 snprintf(loginbuf
, sizeof(loginbuf
), "%s%s", username
, orig_request
->peer_login
+ 1);
1519 httpHeaderPutStrf(hdr_out
, header
, "Basic %s",
1520 base64_encode(loginbuf
));
1524 /* external_acl provided credentials */
1525 if (orig_request
->extacl_user
.size() && orig_request
->extacl_passwd
.size() &&
1526 (strcmp(orig_request
->peer_login
, "PASS") == 0 ||
1527 strcmp(orig_request
->peer_login
, "PROXYPASS") == 0)) {
1529 snprintf(loginbuf
, sizeof(loginbuf
), SQUIDSTRINGPH
":" SQUIDSTRINGPH
,
1530 SQUIDSTRINGPRINT(orig_request
->extacl_user
),
1531 SQUIDSTRINGPRINT(orig_request
->extacl_passwd
));
1532 httpHeaderPutStrf(hdr_out
, header
, "Basic %s",
1533 base64_encode(loginbuf
));
1537 /* Kerberos login to peer */
1538 #if HAVE_KRB5 && HAVE_GSSAPI
1539 if (strncmp(orig_request
->peer_login
, "NEGOTIATE",strlen("NEGOTIATE")) == 0) {
1541 char *PrincipalName
=NULL
,*p
;
1542 if ((p
=strchr(orig_request
->peer_login
,':')) != NULL
) {
1545 Token
= peer_proxy_negotiate_auth(PrincipalName
,request
->peer_host
);
1547 httpHeaderPutStrf(hdr_out
, HDR_PROXY_AUTHORIZATION
, "Negotiate %s",Token
);
1551 #endif /* HAVE_KRB5 && HAVE_GSSAPI */
1553 httpHeaderPutStrf(hdr_out
, header
, "Basic %s",
1554 base64_encode(orig_request
->peer_login
));
1559 * build request headers and append them to a given MemBuf
1560 * used by buildRequestPrefix()
1561 * note: initialised the HttpHeader, the caller is responsible for Clean()-ing
1564 HttpStateData::httpBuildRequestHeader(HttpRequest
* request
,
1565 HttpRequest
* orig_request
,
1567 HttpHeader
* hdr_out
,
1568 http_state_flags flags
)
1570 /* building buffer for complex strings */
1571 #define BBUF_SZ (MAX_URL+32)
1572 LOCAL_ARRAY(char, bbuf
, BBUF_SZ
);
1573 LOCAL_ARRAY(char, ntoabuf
, MAX_IPSTRLEN
);
1574 const HttpHeader
*hdr_in
= &orig_request
->header
;
1575 const HttpHeaderEntry
*e
= NULL
;
1576 HttpHeaderPos pos
= HttpHeaderInitPos
;
1577 assert (hdr_out
->owner
== hoRequest
);
1579 /* append our IMS header */
1580 if (request
->lastmod
> -1)
1581 hdr_out
->putTime(HDR_IF_MODIFIED_SINCE
, request
->lastmod
);
1583 bool we_do_ranges
= decideIfWeDoRanges (orig_request
);
1585 String
strConnection (hdr_in
->getList(HDR_CONNECTION
));
1587 while ((e
= hdr_in
->getEntry(&pos
)))
1588 copyOneHeaderFromClientsideRequestToUpstreamRequest(e
, strConnection
, request
, orig_request
, hdr_out
, we_do_ranges
, flags
);
1590 /* Abstraction break: We should interpret multipart/byterange responses
1591 * into offset-length data, and this works around our inability to do so.
1593 if (!we_do_ranges
&& orig_request
->multipartRangeRequest()) {
1594 /* don't cache the result */
1595 orig_request
->flags
.cachable
= 0;
1596 /* pretend it's not a range request */
1597 delete orig_request
->range
;
1598 orig_request
->range
= NULL
;
1599 orig_request
->flags
.range
= 0;
1603 if (Config
.onoff
.via
) {
1605 strVia
= hdr_in
->getList(HDR_VIA
);
1606 snprintf(bbuf
, BBUF_SZ
, "%d.%d %s",
1607 orig_request
->http_ver
.major
,
1608 orig_request
->http_ver
.minor
, ThisCache
);
1609 strListAdd(&strVia
, bbuf
, ',');
1610 hdr_out
->putStr(HDR_VIA
, strVia
.termedBuf());
1614 if (orig_request
->flags
.accelerated
) {
1615 /* Append Surrogate-Capabilities */
1616 String
strSurrogate(hdr_in
->getList(HDR_SURROGATE_CAPABILITY
));
1618 snprintf(bbuf
, BBUF_SZ
, "%s=\"Surrogate/1.0 ESI/1.0\"", Config
.Accel
.surrogate_id
);
1620 snprintf(bbuf
, BBUF_SZ
, "%s=\"Surrogate/1.0\"", Config
.Accel
.surrogate_id
);
1622 strListAdd(&strSurrogate
, bbuf
, ',');
1623 hdr_out
->putStr(HDR_SURROGATE_CAPABILITY
, strSurrogate
.termedBuf());
1626 /** \pre Handle X-Forwarded-For */
1627 if (strcmp(opt_forwarded_for
, "delete") != 0) {
1629 String strFwd
= hdr_in
->getList(HDR_X_FORWARDED_FOR
);
1631 if (strFwd
.size() > 65536/2) {
1632 // There is probably a forwarding loop with Via detection disabled.
1633 // If we do nothing, String will assert on overflow soon.
1634 // TODO: Terminate all transactions with huge XFF?
1637 static int warnedCount
= 0;
1638 if (warnedCount
++ < 100) {
1639 const char *url
= entry
? entry
->url() : urlCanonical(orig_request
);
1640 debugs(11, 1, "Warning: likely forwarding loop with " << url
);
1644 if (strcmp(opt_forwarded_for
, "on") == 0) {
1645 /** If set to ON - append client IP or 'unknown'. */
1646 if ( orig_request
->client_addr
.IsNoAddr() )
1647 strListAdd(&strFwd
, "unknown", ',');
1649 strListAdd(&strFwd
, orig_request
->client_addr
.NtoA(ntoabuf
, MAX_IPSTRLEN
), ',');
1650 } else if (strcmp(opt_forwarded_for
, "off") == 0) {
1651 /** If set to OFF - append 'unknown'. */
1652 strListAdd(&strFwd
, "unknown", ',');
1653 } else if (strcmp(opt_forwarded_for
, "transparent") == 0) {
1654 /** If set to TRANSPARENT - pass through unchanged. */
1655 } else if (strcmp(opt_forwarded_for
, "truncate") == 0) {
1656 /** If set to TRUNCATE - drop existing list and replace with client IP or 'unknown'. */
1657 if ( orig_request
->client_addr
.IsNoAddr() )
1660 strFwd
= orig_request
->client_addr
.NtoA(ntoabuf
, MAX_IPSTRLEN
);
1662 if (strFwd
.size() > 0)
1663 hdr_out
->putStr(HDR_X_FORWARDED_FOR
, strFwd
.termedBuf());
1665 /** If set to DELETE - do not copy through. */
1667 /* append Host if not there already */
1668 if (!hdr_out
->has(HDR_HOST
)) {
1669 if (orig_request
->peer_domain
) {
1670 hdr_out
->putStr(HDR_HOST
, orig_request
->peer_domain
);
1671 } else if (orig_request
->port
== urlDefaultPort(orig_request
->protocol
)) {
1672 /* use port# only if not default */
1673 hdr_out
->putStr(HDR_HOST
, orig_request
->GetHost());
1675 httpHeaderPutStrf(hdr_out
, HDR_HOST
, "%s:%d",
1676 orig_request
->GetHost(),
1677 (int) orig_request
->port
);
1681 /* append Authorization if known in URL, not in header and going direct */
1682 if (!hdr_out
->has(HDR_AUTHORIZATION
)) {
1683 if (!request
->flags
.proxying
&& *request
->login
) {
1684 httpHeaderPutStrf(hdr_out
, HDR_AUTHORIZATION
, "Basic %s",
1685 base64_encode(request
->login
));
1689 /* Fixup (Proxy-)Authorization special cases. Plain relaying dealt with above */
1690 httpFixupAuthentication(request
, orig_request
, hdr_in
, hdr_out
, flags
);
1692 /* append Cache-Control, add max-age if not there already */
1694 HttpHdrCc
*cc
= hdr_in
->getCc();
1697 cc
= httpHdrCcCreate();
1699 #if 0 /* see bug 2330 */
1700 /* Set no-cache if determined needed but not found */
1701 if (orig_request
->flags
.nocache
)
1702 EBIT_SET(cc
->mask
, CC_NO_CACHE
);
1705 /* Add max-age only without no-cache */
1706 if (!EBIT_TEST(cc
->mask
, CC_MAX_AGE
) && !EBIT_TEST(cc
->mask
, CC_NO_CACHE
)) {
1708 entry
? entry
->url() : urlCanonical(orig_request
);
1709 httpHdrCcSetMaxAge(cc
, getMaxAge(url
));
1711 if (request
->urlpath
.size())
1712 assert(strstr(url
, request
->urlpath
.termedBuf()));
1715 /* Enforce sibling relations */
1716 if (flags
.only_if_cached
)
1717 EBIT_SET(cc
->mask
, CC_ONLY_IF_CACHED
);
1721 httpHdrCcDestroy(cc
);
1724 /* maybe append Connection: keep-alive */
1725 if (flags
.keepalive
) {
1726 if (flags
.proxying
) {
1727 hdr_out
->putStr(HDR_PROXY_CONNECTION
, "keep-alive");
1729 hdr_out
->putStr(HDR_CONNECTION
, "keep-alive");
1733 /* append Front-End-Https */
1734 if (flags
.front_end_https
) {
1735 if (flags
.front_end_https
== 1 || request
->protocol
== PROTO_HTTPS
)
1736 hdr_out
->putStr(HDR_FRONT_END_HTTPS
, "On");
1739 /* Now mangle the headers. */
1740 if (Config2
.onoff
.mangle_request_headers
)
1741 httpHdrMangleList(hdr_out
, request
, ROR_REQUEST
);
1743 strConnection
.clean();
1747 * Decides whether a particular header may be cloned from the received Clients request
1748 * to our outgoing fetch request.
1751 copyOneHeaderFromClientsideRequestToUpstreamRequest(const HttpHeaderEntry
*e
, const String strConnection
, HttpRequest
* request
, const HttpRequest
* orig_request
, HttpHeader
* hdr_out
, const int we_do_ranges
, const http_state_flags flags
)
1753 debugs(11, 5, "httpBuildRequestHeader: " << e
->name
<< ": " << e
->value
);
1757 /** \par RFC 2616 sect 13.5.1 - Hop-by-Hop headers which Squid should not pass on. */
1759 case HDR_PROXY_AUTHORIZATION
:
1760 /** \par Proxy-Authorization:
1761 * Only pass on proxy authentication to peers for which
1762 * authentication forwarding is explicitly enabled
1764 if (!flags
.originpeer
&& flags
.proxying
&& orig_request
->peer_login
&&
1765 (strcmp(orig_request
->peer_login
, "PASS") == 0 ||
1766 strcmp(orig_request
->peer_login
, "PROXYPASS") == 0 ||
1767 strcmp(orig_request
->peer_login
, "PASSTHRU") == 0)) {
1768 hdr_out
->addEntry(e
->clone());
1772 /** \par RFC 2616 sect 13.5.1 - Hop-by-Hop headers which Squid does not pass on. */
1774 case HDR_CONNECTION
: /** \par Connection: */
1775 case HDR_TE
: /** \par TE: */
1776 case HDR_KEEP_ALIVE
: /** \par Keep-Alive: */
1777 case HDR_PROXY_AUTHENTICATE
: /** \par Proxy-Authenticate: */
1778 case HDR_TRAILERS
: /** \par Trailers: */
1779 case HDR_UPGRADE
: /** \par Upgrade: */
1780 case HDR_TRANSFER_ENCODING
: /** \par Transfer-Encoding: */
1784 /** \par OTHER headers I haven't bothered to track down yet. */
1786 case HDR_AUTHORIZATION
:
1787 /** \par WWW-Authorization:
1788 * Pass on WWW authentication */
1790 if (!flags
.originpeer
) {
1791 hdr_out
->addEntry(e
->clone());
1793 /** \note In accelerators, only forward authentication if enabled
1794 * (see also httpFixupAuthentication for special cases)
1796 if (orig_request
->peer_login
&&
1797 (strcmp(orig_request
->peer_login
, "PASS") == 0 ||
1798 strcmp(orig_request
->peer_login
, "PASSTHRU") == 0 ||
1799 strcmp(orig_request
->peer_login
, "PROXYPASS") == 0)) {
1800 hdr_out
->addEntry(e
->clone());
1808 * Normally Squid rewrites the Host: header.
1809 * However, there is one case when we don't: If the URL
1810 * went through our redirector and the admin configured
1811 * 'redir_rewrites_host' to be off.
1813 if (orig_request
->peer_domain
)
1814 hdr_out
->putStr(HDR_HOST
, orig_request
->peer_domain
);
1815 else if (request
->flags
.redirected
&& !Config
.onoff
.redir_rewrites_host
)
1816 hdr_out
->addEntry(e
->clone());
1818 /* use port# only if not default */
1820 if (orig_request
->port
== urlDefaultPort(orig_request
->protocol
)) {
1821 hdr_out
->putStr(HDR_HOST
, orig_request
->GetHost());
1823 httpHeaderPutStrf(hdr_out
, HDR_HOST
, "%s:%d",
1824 orig_request
->GetHost(),
1825 (int) orig_request
->port
);
1831 case HDR_IF_MODIFIED_SINCE
:
1832 /** \par If-Modified-Since:
1833 * append unless we added our own;
1834 * \note at most one client's ims header can pass through */
1836 if (!hdr_out
->has(HDR_IF_MODIFIED_SINCE
))
1837 hdr_out
->addEntry(e
->clone());
1841 case HDR_MAX_FORWARDS
:
1842 /** \par Max-Forwards:
1843 * pass only on TRACE or OPTIONS requests */
1844 if (orig_request
->method
== METHOD_TRACE
|| orig_request
->method
== METHOD_OPTIONS
) {
1845 const int64_t hops
= e
->getInt64();
1848 hdr_out
->putInt64(HDR_MAX_FORWARDS
, hops
- 1);
1855 * If Via is disabled then forward any received header as-is.
1856 * Otherwise leave for explicit updated addition later. */
1858 if (!Config
.onoff
.via
)
1859 hdr_out
->addEntry(e
->clone());
1867 case HDR_REQUEST_RANGE
:
1868 /** \par Range:, If-Range:, Request-Range:
1869 * Only pass if we accept ranges */
1871 hdr_out
->addEntry(e
->clone());
1875 case HDR_PROXY_CONNECTION
:
1877 case HDR_X_FORWARDED_FOR
:
1879 case HDR_CACHE_CONTROL
:
1880 /** \par Proxy-Connaction:, X-Forwarded-For:, Cache-Control:
1881 * handled specially by Squid, so leave off for now.
1882 * append these after the loop if needed */
1885 case HDR_FRONT_END_HTTPS
:
1886 /** \par Front-End-Https:
1887 * Pass thru only if peer is configured with front-end-https */
1888 if (!flags
.front_end_https
)
1889 hdr_out
->addEntry(e
->clone());
1895 * pass on all other header fields
1896 * which are NOT listed by the special Connection: header. */
1898 if (strConnection
.size()>0 && strListIsMember(&strConnection
, e
->name
.termedBuf(), ',')) {
1899 debugs(11, 2, "'" << e
->name
<< "' header cropped by Connection: definition");
1903 hdr_out
->addEntry(e
->clone());
1908 HttpStateData::decideIfWeDoRanges (HttpRequest
* orig_request
)
1911 /* decide if we want to do Ranges ourselves
1912 * and fetch the whole object now)
1913 * We want to handle Ranges ourselves iff
1914 * - we can actually parse client Range specs
1915 * - the specs are expected to be simple enough (e.g. no out-of-order ranges)
1916 * - reply will be cachable
1917 * (If the reply will be uncachable we have to throw it away after
1918 * serving this request, so it is better to forward ranges to
1919 * the server and fetch only the requested content)
1922 if (NULL
== orig_request
->range
|| !orig_request
->flags
.cachable
1923 || orig_request
->range
->offsetLimitExceeded() || orig_request
->flags
.connection_auth
)
1926 debugs(11, 8, "decideIfWeDoRanges: range specs: " <<
1927 orig_request
->range
<< ", cachable: " <<
1928 orig_request
->flags
.cachable
<< "; we_do_ranges: " << result
);
1933 /* build request prefix and append it to a given MemBuf;
1934 * return the length of the prefix */
1936 HttpStateData::buildRequestPrefix(HttpRequest
* aRequest
,
1937 HttpRequest
* original_request
,
1938 StoreEntry
* sentry
,
1940 http_state_flags stateFlags
)
1942 const int offset
= mb
->size
;
1943 HttpVersion
httpver(1,0);
1944 mb
->Printf("%s %s HTTP/%d.%d\r\n",
1945 RequestMethodStr(aRequest
->method
),
1946 aRequest
->urlpath
.size() ? aRequest
->urlpath
.termedBuf() : "/",
1947 httpver
.major
,httpver
.minor
);
1948 /* build and pack headers */
1950 HttpHeader
hdr(hoRequest
);
1952 httpBuildRequestHeader(aRequest
, original_request
, sentry
, &hdr
, stateFlags
);
1954 if (aRequest
->flags
.pinned
&& aRequest
->flags
.connection_auth
)
1955 aRequest
->flags
.auth_sent
= 1;
1956 else if (hdr
.has(HDR_AUTHORIZATION
))
1957 aRequest
->flags
.auth_sent
= 1;
1959 packerToMemInit(&p
, mb
);
1964 /* append header terminator */
1965 mb
->append(crlf
, 2);
1966 return mb
->size
- offset
;
1969 /* This will be called when connect completes. Write request. */
1971 HttpStateData::sendRequest()
1975 debugs(11, 5, "httpSendRequest: FD " << fd
<< ", request " << request
<< ", this " << this << ".");
1976 typedef CommCbMemFunT
<HttpStateData
, CommTimeoutCbParams
> TimeoutDialer
;
1977 AsyncCall::Pointer timeoutCall
= asyncCall(11, 5, "HttpStateData::httpTimeout",
1978 TimeoutDialer(this,&HttpStateData::httpTimeout
));
1979 commSetTimeout(fd
, Config
.Timeout
.lifetime
, timeoutCall
);
1980 flags
.do_next_read
= 1;
1981 maybeReadVirginBody();
1983 if (orig_request
->body_pipe
!= NULL
) {
1984 if (!startRequestBodyFlow()) // register to receive body data
1986 typedef CommCbMemFunT
<HttpStateData
, CommIoCbParams
> Dialer
;
1987 Dialer
dialer(this, &HttpStateData::sentRequestBody
);
1988 requestSender
= asyncCall(11,5, "HttpStateData::sentRequestBody", dialer
);
1990 assert(!requestBodySource
);
1991 typedef CommCbMemFunT
<HttpStateData
, CommIoCbParams
> Dialer
;
1992 Dialer
dialer(this, &HttpStateData::sendComplete
);
1993 requestSender
= asyncCall(11,5, "HttpStateData::SendComplete", dialer
);
1996 if (_peer
!= NULL
) {
1997 if (_peer
->options
.originserver
) {
1999 flags
.originpeer
= 1;
2002 flags
.originpeer
= 0;
2006 flags
.originpeer
= 0;
2010 * Is keep-alive okay for all request methods?
2012 if (orig_request
->flags
.must_keepalive
)
2013 flags
.keepalive
= 1;
2014 else if (!Config
.onoff
.server_pconns
)
2015 flags
.keepalive
= 0;
2016 else if (_peer
== NULL
)
2017 flags
.keepalive
= 1;
2018 else if (_peer
->stats
.n_keepalives_sent
< 10)
2019 flags
.keepalive
= 1;
2020 else if ((double) _peer
->stats
.n_keepalives_recv
/
2021 (double) _peer
->stats
.n_keepalives_sent
> 0.50)
2022 flags
.keepalive
= 1;
2025 if (neighborType(_peer
, request
) == PEER_SIBLING
&&
2026 !_peer
->options
.allow_miss
)
2027 flags
.only_if_cached
= 1;
2029 flags
.front_end_https
= _peer
->front_end_https
;
2033 request
->peer_host
=_peer
?_peer
->host
:NULL
;
2034 buildRequestPrefix(request
, orig_request
, entry
, &mb
, flags
);
2035 debugs(11, 6, "httpSendRequest: FD " << fd
<< ":\n" << mb
.buf
);
2036 comm_write_mbuf(fd
, &mb
, requestSender
);
2042 httpStart(FwdState
*fwd
)
2044 debugs(11, 3, "httpStart: \"" << RequestMethodStr(fwd
->request
->method
) << " " << fwd
->entry
->url() << "\"" );
2045 HttpStateData
*httpState
= new HttpStateData(fwd
);
2047 if (!httpState
->sendRequest()) {
2048 debugs(11, 3, "httpStart: aborted");
2053 statCounter
.server
.all
.requests
++;
2054 statCounter
.server
.http
.requests
++;
2057 * We used to set the read timeout here, but not any more.
2058 * Now its set in httpSendComplete() after the full request,
2059 * including request body, has been written to the server.
2064 HttpStateData::doneSendingRequestBody()
2066 debugs(11,5, HERE
<< "doneSendingRequestBody: FD " << fd
);
2069 if (Config
.accessList
.brokenPosts
) {
2070 ACLFilledChecklist
ch(Config
.accessList
.brokenPosts
, request
, NULL
);
2071 if (!ch
.fastCheck()) {
2072 debugs(11, 5, "doneSendingRequestBody: didn't match brokenPosts");
2073 CommIoCbParams
io(NULL
);
2078 debugs(11, 2, "doneSendingRequestBody: matched brokenPosts");
2079 typedef CommCbMemFunT
<HttpStateData
, CommIoCbParams
> Dialer
;
2080 Dialer
dialer(this, &HttpStateData::sendComplete
);
2081 AsyncCall::Pointer call
= asyncCall(11,5, "HttpStateData::SendComplete", dialer
);
2082 comm_write(fd
, "\r\n", 2, call
);
2086 debugs(11, 5, "doneSendingRequestBody: No brokenPosts list");
2087 #endif /* HTTP_VIOLATIONS */
2089 CommIoCbParams
io(NULL
);
2095 // more origin request body data is available
2097 HttpStateData::handleMoreRequestBodyAvailable()
2099 if (eof
|| fd
< 0) {
2100 // XXX: we should check this condition in other callbacks then!
2101 // TODO: Check whether this can actually happen: We should unsubscribe
2102 // as a body consumer when the above condition(s) are detected.
2103 debugs(11, 1, HERE
<< "Transaction aborted while reading HTTP body");
2107 assert(requestBodySource
!= NULL
);
2109 if (requestBodySource
->buf().hasContent()) {
2110 // XXX: why does not this trigger a debug message on every request?
2112 if (flags
.headers_parsed
&& !flags
.abuse_detected
) {
2113 flags
.abuse_detected
= 1;
2114 debugs(11, 1, "http handleMoreRequestBodyAvailable: Likely proxy abuse detected '" << orig_request
->client_addr
<< "' -> '" << entry
->url() << "'" );
2116 if (virginReply()->sline
.status
== HTTP_INVALID_HEADER
) {
2123 HttpStateData::handleMoreRequestBodyAvailable();
2126 // premature end of the request body
2128 HttpStateData::handleRequestBodyProducerAborted()
2130 ServerStateData::handleRequestBodyProducerAborted();
2131 // XXX: SendComplete(COMM_ERR_CLOSING) does little. Is it enough?
2132 CommIoCbParams
io(NULL
);
2134 io
.flag
=COMM_ERR_CLOSING
;
2138 // called when we wrote request headers(!) or a part of the body
2140 HttpStateData::sentRequestBody(const CommIoCbParams
&io
)
2143 kb_incr(&statCounter
.server
.http
.kbytes_out
, io
.size
);
2145 ServerStateData::sentRequestBody(io
);
2148 // Quickly abort the transaction
2149 // TODO: destruction should be sufficient as the destructor should cleanup,
2150 // including canceling close handlers
2152 HttpStateData::abortTransaction(const char *reason
)
2154 debugs(11,5, HERE
<< "aborting transaction for " << reason
<<
2155 "; FD " << fd
<< ", this " << this);
2162 fwd
->handleUnregisteredServerEnd();
2163 deleteThis("HttpStateData::abortTransaction");
2168 httpBuildVersion(HttpVersion
* version
, unsigned int major
, unsigned int minor
)
2170 version
->major
= major
;
2171 version
->minor
= minor
;
2176 HttpStateData::originalRequest()
2178 return orig_request
;