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
)
315 if (request
->flags
.accelerated
&& reply
->surrogate_control
) {
316 HttpHdrScTarget
*sctusable
=
317 httpHdrScGetMergedTarget(reply
->surrogate_control
,
318 Config
.Accel
.surrogate_id
);
321 if (EBIT_TEST(sctusable
->mask
, SC_NO_STORE
) ||
322 (Config
.onoff
.surrogate_is_remote
323 && EBIT_TEST(sctusable
->mask
, SC_NO_STORE_REMOTE
))) {
324 surrogateNoStore
= true;
325 entry
->makePrivate();
328 /* The HttpHeader logic cannot tell if the header it's parsing is a reply to an
329 * accelerated request or not...
330 * Still, this is an abtraction breach. - RC
332 if (sctusable
->max_age
!= -1) {
333 if (sctusable
->max_age
< sctusable
->max_stale
)
334 reply
->expires
= reply
->date
+ sctusable
->max_age
;
336 reply
->expires
= reply
->date
+ sctusable
->max_stale
;
338 /* And update the timestamps */
339 entry
->timestampsSet();
342 /* We ignore cache-control directives as per the Surrogate specification */
343 ignoreCacheControl
= true;
345 httpHdrScTargetDestroy(sctusable
);
353 HttpStateData::cacheableReply()
355 HttpReply
const *rep
= finalReply();
356 HttpHeader
const *hdr
= &rep
->header
;
357 const int cc_mask
= (rep
->cache_control
) ? rep
->cache_control
->mask
: 0;
361 const refresh_t
*R
= NULL
;
363 /* This strange looking define first looks up the refresh pattern
364 * and then checks if the specified flag is set. The main purpose
365 * of this is to simplify the refresh pattern lookup and HTTP_VIOLATIONS
368 #define REFRESH_OVERRIDE(flag) \
369 ((R = (R ? R : refreshLimits(entry->mem_obj->url))) , \
370 (R && R->flags.flag))
372 #define REFRESH_OVERRIDE(flag) 0
375 if (surrogateNoStore
)
378 if (!ignoreCacheControl
) {
379 if (EBIT_TEST(cc_mask
, CC_PRIVATE
)) {
380 if (!REFRESH_OVERRIDE(ignore_private
))
384 if (EBIT_TEST(cc_mask
, CC_NO_CACHE
)) {
385 if (!REFRESH_OVERRIDE(ignore_no_cache
))
389 if (EBIT_TEST(cc_mask
, CC_NO_STORE
)) {
390 if (!REFRESH_OVERRIDE(ignore_no_store
))
395 if (request
->flags
.auth
|| request
->flags
.auth_sent
) {
397 * Responses to requests with authorization may be cached
398 * only if a Cache-Control: public reply header is present.
399 * RFC 2068, sec 14.9.4
402 if (!EBIT_TEST(cc_mask
, CC_PUBLIC
)) {
403 if (!REFRESH_OVERRIDE(ignore_auth
))
408 /* Pragma: no-cache in _replies_ is not documented in HTTP,
409 * but servers like "Active Imaging Webcast/2.0" sure do use it */
410 if (hdr
->has(HDR_PRAGMA
)) {
411 String s
= hdr
->getList(HDR_PRAGMA
);
412 const int no_cache
= strListIsMember(&s
, "no-cache", ',');
416 if (!REFRESH_OVERRIDE(ignore_no_cache
))
422 * The "multipart/x-mixed-replace" content type is used for
423 * continuous push replies. These are generally dynamic and
424 * probably should not be cachable
426 if ((v
= hdr
->getStr(HDR_CONTENT_TYPE
)))
427 if (!strncasecmp(v
, "multipart/x-mixed-replace", 25))
430 switch (rep
->sline
.status
) {
431 /* Responses that are cacheable */
435 case HTTP_NON_AUTHORITATIVE_INFORMATION
:
437 case HTTP_MULTIPLE_CHOICES
:
439 case HTTP_MOVED_PERMANENTLY
:
443 * Don't cache objects that need to be refreshed on next request,
444 * unless we know how to refresh it.
447 if (!refreshIsCachable(entry
)) {
448 debugs(22, 3, "refreshIsCachable() returned non-cacheable..");
452 /* don't cache objects from peers w/o LMT, Date, or Expires */
453 /* check that is it enough to check headers @?@ */
456 else if (rep
->last_modified
> -1)
461 /* @?@ (here and 302): invalid expires header compiles to squid_curtime */
462 else if (rep
->expires
> -1)
470 /* Responses that only are cacheable if the server says so */
472 case HTTP_MOVED_TEMPORARILY
:
473 case HTTP_TEMPORARY_REDIRECT
:
474 if (rep
->expires
> rep
->date
&& rep
->date
> 0)
482 /* Errors can be negatively cached */
484 case HTTP_NO_CONTENT
:
488 case HTTP_BAD_REQUEST
:
494 case HTTP_METHOD_NOT_ALLOWED
:
496 case HTTP_REQUEST_URI_TOO_LARGE
:
498 case HTTP_INTERNAL_SERVER_ERROR
:
500 case HTTP_NOT_IMPLEMENTED
:
502 case HTTP_BAD_GATEWAY
:
504 case HTTP_SERVICE_UNAVAILABLE
:
506 case HTTP_GATEWAY_TIMEOUT
:
512 /* Some responses can never be cached */
514 case HTTP_PARTIAL_CONTENT
: /* Not yet supported */
518 case HTTP_NOT_MODIFIED
:
520 case HTTP_UNAUTHORIZED
:
522 case HTTP_PROXY_AUTHENTICATION_REQUIRED
:
524 case HTTP_INVALID_HEADER
: /* Squid header parsing error */
526 case HTTP_HEADER_TOO_LARGE
:
528 case HTTP_PAYMENT_REQUIRED
:
529 case HTTP_NOT_ACCEPTABLE
:
530 case HTTP_REQUEST_TIMEOUT
:
532 case HTTP_LENGTH_REQUIRED
:
533 case HTTP_PRECONDITION_FAILED
:
534 case HTTP_REQUEST_ENTITY_TOO_LARGE
:
535 case HTTP_UNSUPPORTED_MEDIA_TYPE
:
536 case HTTP_UNPROCESSABLE_ENTITY
:
538 case HTTP_FAILED_DEPENDENCY
:
539 case HTTP_INSUFFICIENT_STORAGE
:
540 case HTTP_REQUESTED_RANGE_NOT_SATISFIABLE
:
541 case HTTP_EXPECTATION_FAILED
:
546 /* RFC 2616 section 6.1.1: an unrecognized response MUST NOT be cached. */
547 debugs (11, 3, HERE
<< "Unknown HTTP status code " << rep
->sline
.status
<< ". Not cacheable.");
559 * For Vary, store the relevant request headers as
560 * virtual headers in the reply
561 * Returns false if the variance cannot be stored
564 httpMakeVaryMark(HttpRequest
* request
, HttpReply
const * reply
)
567 const char *pos
= NULL
;
574 vary
= reply
->header
.getList(HDR_VARY
);
576 while (strListGetItem(&vary
, ',', &item
, &ilen
, &pos
)) {
577 char *name
= (char *)xmalloc(ilen
+ 1);
578 xstrncpy(name
, item
, ilen
+ 1);
581 if (strcmp(name
, "*") == 0) {
582 /* Can not handle "Vary: *" withtout ETag support */
588 strListAdd(&vstr
, name
, ',');
589 hdr
= request
->header
.getByName(name
);
591 value
= hdr
.termedBuf();
594 value
= rfc1738_escape_part(value
);
595 vstr
.append("=\"", 2);
597 vstr
.append("\"", 1);
604 #if X_ACCELERATOR_VARY
607 vary
= reply
->header
.getList(HDR_X_ACCELERATOR_VARY
);
609 while (strListGetItem(&vary
, ',', &item
, &ilen
, &pos
)) {
610 char *name
= (char *)xmalloc(ilen
+ 1);
611 xstrncpy(name
, item
, ilen
+ 1);
613 strListAdd(&vstr
, name
, ',');
614 hdr
= request
->header
.getByName(name
);
616 value
= hdr
.termedBuf();
619 value
= rfc1738_escape_part(value
);
620 vstr
.append("=\"", 2);
622 vstr
.append("\"", 1);
631 debugs(11, 3, "httpMakeVaryMark: " << vstr
);
632 return vstr
.termedBuf();
636 HttpStateData::keepaliveAccounting(HttpReply
*reply
)
640 _peer
->stats
.n_keepalives_sent
++;
642 if (reply
->keep_alive
) {
644 _peer
->stats
.n_keepalives_recv
++;
646 if (Config
.onoff
.detect_broken_server_pconns
647 && reply
->bodySize(request
->method
) == -1 && !flags
.chunked
) {
648 debugs(11, 1, "keepaliveAccounting: Impossible keep-alive header from '" << entry
->url() << "'" );
649 // debugs(11, 2, "GOT HTTP REPLY HDR:\n---------\n" << readBuf->content() << "\n----------" );
650 flags
.keepalive_broken
= 1;
656 HttpStateData::checkDateSkew(HttpReply
*reply
)
658 if (reply
->date
> -1 && !_peer
) {
659 int skew
= abs((int)(reply
->date
- squid_curtime
));
662 debugs(11, 3, "" << request
->GetHost() << "'s clock is skewed by " << skew
<< " seconds!");
667 * This creates the error page itself.. its likely
668 * that the forward ported reply header max size patch
669 * generates non http conformant error pages - in which
670 * case the errors where should be 'BAD_GATEWAY' etc
673 HttpStateData::processReplyHeader()
675 /** Creates a blank header. If this routine is made incremental, this will not do */
676 Ctx ctx
= ctx_enter(entry
->mem_obj
->url
);
677 debugs(11, 3, "processReplyHeader: key '" << entry
->getMD5Text() << "'");
679 assert(!flags
.headers_parsed
);
681 http_status error
= HTTP_STATUS_NONE
;
683 HttpReply
*newrep
= new HttpReply
;
684 const bool parsed
= newrep
->parse(readBuf
, eof
, &error
);
686 if (!parsed
&& readBuf
->contentSize() > 5 && strncmp(readBuf
->content(), "HTTP/", 5) != 0 && strncmp(readBuf
->content(), "ICY", 3) != 0) {
688 HttpReply
*tmprep
= new HttpReply
;
689 tmprep
->setHeaders(HTTP_OK
, "Gatewaying", NULL
, -1, -1, -1);
690 tmprep
->header
.putExt("X-Transformed-From", "HTTP/0.9");
692 newrep
->parse(mb
, eof
, &error
);
695 if (!parsed
&& error
> 0) { // unrecoverable parsing error
696 debugs(11, 3, "processReplyHeader: Non-HTTP-compliant header: '" << readBuf
->content() << "'");
697 flags
.headers_parsed
= 1;
698 newrep
->sline
.version
= HttpVersion(1,0);
699 newrep
->sline
.status
= error
;
700 HttpReply
*vrep
= setVirginReply(newrep
);
701 entry
->replaceHttpReply(vrep
);
706 if (!parsed
) { // need more data
714 debugs(11, 9, "GOT HTTP REPLY HDR:\n---------\n" << readBuf
->content() << "\n----------");
716 header_bytes_read
= headersEnd(readBuf
->content(), readBuf
->contentSize());
717 readBuf
->consume(header_bytes_read
);
721 if (newrep
->sline
.protocol
== PROTO_HTTP
&& newrep
->header
.hasListMember(HDR_TRANSFER_ENCODING
, "chunked", ',')) {
723 httpChunkDecoder
= new ChunkedCodingParser
;
726 if (!peerSupportsConnectionPinning())
727 orig_request
->flags
.connection_auth_disabled
= 1;
729 HttpReply
*vrep
= setVirginReply(newrep
);
730 flags
.headers_parsed
= 1;
732 keepaliveAccounting(vrep
);
736 processSurrogateControl (vrep
);
738 /** \todo IF the reply is a 1.0 reply, AND it has a Connection: Header
739 * Parse the header and remove all referenced headers
742 orig_request
->hier
.peer_reply_status
= newrep
->sline
.status
;
749 * returns true if the peer can support connection pinning
751 bool HttpStateData::peerSupportsConnectionPinning() const
753 const HttpReply
*rep
= entry
->mem_obj
->getReply();
754 const HttpHeader
*hdr
= &rep
->header
;
761 /*If this peer does not support connection pinning (authenticated
762 connections) return false
764 if (!_peer
->connection_auth
)
767 /*The peer supports connection pinning and the http reply status
768 is not unauthorized, so the related connection can be pinned
770 if (rep
->sline
.status
!= HTTP_UNAUTHORIZED
)
773 /*The server respond with HTTP_UNAUTHORIZED and the peer configured
774 with "connection-auth=on" we know that the peer supports pinned
777 if (_peer
->connection_auth
== 1)
780 /*At this point peer has configured with "connection-auth=auto"
781 parameter so we need some extra checks to decide if we are going
782 to allow pinned connections or not
785 /*if the peer configured with originserver just allow connection
786 pinning (squid 2.6 behaviour)
788 if (_peer
->options
.originserver
)
791 /*if the connections it is already pinned it is OK*/
792 if (request
->flags
.pinned
)
795 /*Allow pinned connections only if the Proxy-support header exists in
796 reply and has in its list the "Session-Based-Authentication"
797 which means that the peer supports connection pinning.
799 if (!hdr
->has(HDR_PROXY_SUPPORT
))
802 header
= hdr
->getStrOrList(HDR_PROXY_SUPPORT
);
803 /* XXX This ought to be done in a case-insensitive manner */
804 rc
= (strstr(header
.termedBuf(), "Session-Based-Authentication") != NULL
);
809 // Called when we parsed (and possibly adapted) the headers but
810 // had not starting storing (a.k.a., sending) the body yet.
812 HttpStateData::haveParsedReplyHeaders()
814 ServerStateData::haveParsedReplyHeaders();
816 Ctx ctx
= ctx_enter(entry
->mem_obj
->url
);
817 HttpReply
*rep
= finalReply();
819 if (rep
->sline
.status
== HTTP_PARTIAL_CONTENT
&&
821 currentOffset
= rep
->content_range
->spec
.offset
;
823 entry
->timestampsSet();
825 /* Check if object is cacheable or not based on reply code */
826 debugs(11, 3, "haveParsedReplyHeaders: HTTP CODE: " << rep
->sline
.status
);
828 if (neighbors_do_private_keys
)
829 httpMaybeRemovePublic(entry
, rep
->sline
.status
);
831 if (rep
->header
.has(HDR_VARY
)
832 #if X_ACCELERATOR_VARY
833 || rep
->header
.has(HDR_X_ACCELERATOR_VARY
)
836 const char *vary
= httpMakeVaryMark(orig_request
, rep
);
839 entry
->makePrivate();
840 if (!fwd
->reforwardableStatus(rep
->sline
.status
))
841 EBIT_CLR(entry
->flags
, ENTRY_FWD_HDR_WAIT
);
845 entry
->mem_obj
->vary_headers
= xstrdup(vary
);
853 * If its not a reply that we will re-forward, then
854 * allow the client to get it.
856 if (!fwd
->reforwardableStatus(rep
->sline
.status
))
857 EBIT_CLR(entry
->flags
, ENTRY_FWD_HDR_WAIT
);
859 switch (cacheableReply()) {
866 entry
->makePrivate();
872 if (Config
.negativeTtl
> 0)
873 entry
->cacheNegatively();
876 entry
->makePrivate();
888 if (!ignoreCacheControl
&& rep
->cache_control
) {
889 if (EBIT_TEST(rep
->cache_control
->mask
, CC_PROXY_REVALIDATE
))
890 EBIT_SET(entry
->flags
, ENTRY_REVALIDATE
);
891 else if (EBIT_TEST(rep
->cache_control
->mask
, CC_MUST_REVALIDATE
))
892 EBIT_SET(entry
->flags
, ENTRY_REVALIDATE
);
896 headersLog(1, 0, request
->method
, rep
);
903 HttpStateData::ConnectionStatus
904 HttpStateData::statusIfComplete() const
906 const HttpReply
*rep
= virginReply();
908 * If the reply wants to close the connection, it takes precedence */
910 if (httpHeaderHasConnDir(&rep
->header
, "close"))
911 return COMPLETE_NONPERSISTENT_MSG
;
914 * If we didn't send a keep-alive request header, then this
915 * can not be a persistent connection.
917 if (!flags
.keepalive
)
918 return COMPLETE_NONPERSISTENT_MSG
;
921 * If we haven't sent the whole request then this can not be a persistent
924 if (!flags
.request_sent
) {
925 debugs(11, 1, "statusIfComplete: Request not yet fully sent \"" << RequestMethodStr(orig_request
->method
) << " " << entry
->url() << "\"" );
926 return COMPLETE_NONPERSISTENT_MSG
;
930 * What does the reply have to say about keep-alive?
934 * If the origin server (HTTP/1.0) does not send a keep-alive
935 * header, but keeps the connection open anyway, what happens?
936 * We'll return here and http.c waits for an EOF before changing
937 * store_status to STORE_OK. Combine this with ENTRY_FWD_HDR_WAIT
938 * and an error status code, and we might have to wait until
939 * the server times out the socket.
941 if (!rep
->keep_alive
)
942 return COMPLETE_NONPERSISTENT_MSG
;
944 return COMPLETE_PERSISTENT_MSG
;
947 HttpStateData::ConnectionStatus
948 HttpStateData::persistentConnStatus() const
950 debugs(11, 3, "persistentConnStatus: FD " << fd
<< " eof=" << eof
);
951 const HttpReply
*vrep
= virginReply();
952 debugs(11, 5, "persistentConnStatus: content_length=" << vrep
->content_length
);
954 /* If we haven't seen the end of reply headers, we are not done */
955 debugs(11, 5, "persistentConnStatus: flags.headers_parsed=" << flags
.headers_parsed
);
957 if (!flags
.headers_parsed
)
958 return INCOMPLETE_MSG
;
960 if (eof
) // already reached EOF
961 return COMPLETE_NONPERSISTENT_MSG
;
964 * In chunked response we do not know the content length but we are absolutely
965 * sure about the end of response, so we are calling the statusIfComplete to
966 * decide if we can be persistant
968 if (lastChunk
&& flags
.chunked
)
969 return statusIfComplete();
971 const int64_t clen
= vrep
->bodySize(request
->method
);
973 debugs(11, 5, "persistentConnStatus: clen=" << clen
);
975 /* If the body size is unknown we must wait for EOF */
977 return INCOMPLETE_MSG
;
980 * If the body size is known, we must wait until we've gotten all of it. */
983 // if (entry->mem_obj->endOffset() < vrep->content_length + vrep->hdr_sz)
984 const int64_t body_bytes_read
= reply_bytes_read
- header_bytes_read
;
985 debugs(11,5, "persistentConnStatus: body_bytes_read=" <<
986 body_bytes_read
<< " content_length=" << vrep
->content_length
);
988 if (body_bytes_read
< vrep
->content_length
)
989 return INCOMPLETE_MSG
;
991 if (body_bytes_truncated
> 0) // already read more than needed
992 return COMPLETE_NONPERSISTENT_MSG
; // disable pconns
996 * If there is no message body or we got it all, we can be persistent */
997 return statusIfComplete();
1001 * This is the callback after some data has been read from the network
1005 HttpStateData::ReadReplyWrapper(int fd, char *buf, size_t len, comm_err_t flag, int xerrno, void *data)
1007 HttpStateData *httpState = static_cast<HttpStateData *>(data);
1008 assert (fd == httpState->fd);
1009 // assert(buf == readBuf->content());
1010 PROF_start(HttpStateData_readReply);
1011 httpState->readReply(len, flag, xerrno);
1012 PROF_stop(HttpStateData_readReply);
1016 /* XXX this function is too long! */
1018 HttpStateData::readReply(const CommIoCbParams
&io
)
1024 assert(fd
== io
.fd
);
1026 flags
.do_next_read
= 0;
1028 debugs(11, 5, "httpReadReply: FD " << fd
<< ": len " << len
<< ".");
1030 // Bail out early on COMM_ERR_CLOSING - close handlers will tidy up for us
1031 if (io
.flag
== COMM_ERR_CLOSING
) {
1032 debugs(11, 3, "http socket closing");
1036 if (EBIT_TEST(entry
->flags
, ENTRY_ABORTED
)) {
1037 maybeReadVirginBody();
1041 // handle I/O errors
1042 if (io
.flag
!= COMM_OK
|| len
< 0) {
1043 debugs(11, 2, "httpReadReply: FD " << fd
<< ": read failure: " << xstrerror() << ".");
1045 if (ignoreErrno(io
.xerrno
)) {
1046 flags
.do_next_read
= 1;
1049 err
= errorCon(ERR_READ_ERROR
, HTTP_BAD_GATEWAY
, fwd
->request
);
1050 err
->xerrno
= io
.xerrno
;
1052 flags
.do_next_read
= 0;
1061 readBuf
->appended(len
);
1062 reply_bytes_read
+= len
;
1065 DelayId delayId
= entry
->mem_obj
->mostBytesAllowed();
1066 delayId
.bytesIn(len
);
1069 kb_incr(&statCounter
.server
.all
.kbytes_in
, len
);
1070 kb_incr(&statCounter
.server
.http
.kbytes_in
, len
);
1071 IOStats
.Http
.reads
++;
1073 for (clen
= len
- 1, bin
= 0; clen
; bin
++)
1076 IOStats
.Http
.read_hist
[bin
]++;
1078 // update peer response time stats (%<pt)
1079 const timeval
&sent
= orig_request
->hier
.peer_http_request_sent
;
1080 orig_request
->hier
.peer_response_time
=
1081 sent
.tv_sec
? tvSubMsec(sent
, current_time
) : -1;
1085 * Here the RFC says we should ignore whitespace between replies, but we can't as
1086 * doing so breaks HTTP/0.9 replies beginning with witespace, and in addition
1087 * the response splitting countermeasures is extremely likely to trigger on this,
1088 * not allowing connection reuse in the first place.
1091 if (!flags
.headers_parsed
&& len
> 0 && fd_table
[fd
].uses
> 1) {
1092 /* Skip whitespace between replies */
1094 while (len
> 0 && xisspace(*buf
))
1095 xmemmove(buf
, buf
+ 1, len
--);
1098 /* Continue to read... */
1099 /* Timeout NOT increased. This whitespace was from previous reply */
1100 flags
.do_next_read
= 1;
1101 maybeReadVirginBody();
1108 if (len
== 0) { // reached EOF?
1110 flags
.do_next_read
= 0;
1113 if (!flags
.headers_parsed
) { // have not parsed headers yet?
1114 PROF_start(HttpStateData_processReplyHeader
);
1115 processReplyHeader();
1116 PROF_stop(HttpStateData_processReplyHeader
);
1118 if (!continueAfterParsingHeader()) // parsing error or need more data
1119 return; // TODO: send errors to ICAP
1121 adaptOrFinalizeReply();
1124 // kick more reads if needed and/or process the response body, if any
1125 PROF_start(HttpStateData_processReplyBody
);
1126 processReplyBody(); // may call serverComplete()
1127 PROF_stop(HttpStateData_processReplyBody
);
1131 \retval true if we can continue with processing the body or doing ICAP.
1134 HttpStateData::continueAfterParsingHeader()
1136 if (!flags
.headers_parsed
&& !eof
) {
1137 debugs(11, 9, HERE
<< "needs more at " << readBuf
->contentSize());
1138 flags
.do_next_read
= 1;
1139 /** \retval false If we have not finished parsing the headers and may get more data.
1140 * Schedules more reads to retrieve the missing data.
1142 maybeReadVirginBody(); // schedules all kinds of reads; TODO: rename
1146 /** If we are done with parsing, check for errors */
1148 err_type error
= ERR_NONE
;
1150 if (flags
.headers_parsed
) { // parsed headers, possibly with errors
1151 // check for header parsing errors
1152 if (HttpReply
*vrep
= virginReply()) {
1153 const http_status s
= vrep
->sline
.status
;
1154 const HttpVersion
&v
= vrep
->sline
.version
;
1155 if (s
== HTTP_INVALID_HEADER
&& v
!= HttpVersion(0,9)) {
1156 debugs(11, DBG_IMPORTANT
, "WARNING: HTTP: Invalid Response: Bad header encountered from " << entry
->url() << " AKA " << orig_request
->GetHost() << orig_request
->urlpath
.termedBuf() );
1157 error
= ERR_INVALID_RESP
;
1158 } else if (s
== HTTP_HEADER_TOO_LARGE
) {
1159 fwd
->dontRetry(true);
1160 error
= ERR_TOO_BIG
;
1162 return true; // done parsing, got reply, and no error
1165 // parsed headers but got no reply
1166 debugs(11, DBG_IMPORTANT
, "WARNING: HTTP: Invalid Response: No reply at all for " << entry
->url() << " AKA " << orig_request
->GetHost() << orig_request
->urlpath
.termedBuf() );
1167 error
= ERR_INVALID_RESP
;
1171 if (readBuf
->hasContent()) {
1172 error
= ERR_INVALID_RESP
;
1173 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() );
1175 error
= ERR_ZERO_SIZE_OBJECT
;
1176 debugs(11, DBG_IMPORTANT
, "WARNING: HTTP: Invalid Response: No object data received for " << entry
->url() << " AKA " << orig_request
->GetHost() << orig_request
->urlpath
.termedBuf() );
1180 assert(error
!= ERR_NONE
);
1182 fwd
->fail(errorCon(error
, HTTP_BAD_GATEWAY
, fwd
->request
));
1183 flags
.do_next_read
= 0;
1185 return false; // quit on error
1188 /** truncate what we read if we read too much so that writeReplyBody()
1189 writes no more than what we should have read */
1191 HttpStateData::truncateVirginBody()
1193 assert(flags
.headers_parsed
);
1195 HttpReply
*vrep
= virginReply();
1197 if (!vrep
->expectingBody(request
->method
, clen
) || clen
< 0)
1198 return; // no body or a body of unknown size, including chunked
1200 const int64_t body_bytes_read
= reply_bytes_read
- header_bytes_read
;
1201 if (body_bytes_read
- body_bytes_truncated
<= clen
)
1202 return; // we did not read too much or already took care of the extras
1204 if (const int64_t extras
= body_bytes_read
- body_bytes_truncated
- clen
) {
1205 // server sent more that the advertised content length
1206 debugs(11,5, HERE
<< "body_bytes_read=" << body_bytes_read
<<
1207 " clen=" << clen
<< '/' << vrep
->content_length
<<
1208 " body_bytes_truncated=" << body_bytes_truncated
<< '+' << extras
);
1210 readBuf
->truncate(extras
);
1211 body_bytes_truncated
+= extras
;
1216 * Call this when there is data from the origin server
1217 * which should be sent to either StoreEntry, or to ICAP...
1220 HttpStateData::writeReplyBody()
1222 truncateVirginBody(); // if needed
1223 const char *data
= readBuf
->content();
1224 int len
= readBuf
->contentSize();
1225 addVirginReplyBody(data
, len
);
1226 readBuf
->consume(len
);
1230 HttpStateData::decodeAndWriteReplyBody()
1232 const char *data
= NULL
;
1234 bool wasThereAnException
= false;
1235 assert(flags
.chunked
);
1236 assert(httpChunkDecoder
);
1237 SQUID_ENTER_THROWING_CODE();
1240 const bool doneParsing
= httpChunkDecoder
->parse(readBuf
,&decodedData
);
1241 len
= decodedData
.contentSize();
1242 data
=decodedData
.content();
1243 addVirginReplyBody(data
, len
);
1246 flags
.do_next_read
= 0;
1248 SQUID_EXIT_THROWING_CODE(wasThereAnException
);
1249 return wasThereAnException
;
1253 * processReplyBody has two purposes:
1254 * 1 - take the reply body data, if any, and put it into either
1255 * the StoreEntry, or give it over to ICAP.
1256 * 2 - see if we made it to the end of the response (persistent
1257 * connections and such)
1260 HttpStateData::processReplyBody()
1262 AsyncCall::Pointer call
;
1263 IpAddress client_addr
;
1264 bool ispinned
= false;
1266 if (!flags
.headers_parsed
) {
1267 flags
.do_next_read
= 1;
1268 maybeReadVirginBody();
1273 debugs(11,5, HERE
<< "adaptationAccessCheckPending=" << adaptationAccessCheckPending
);
1274 if (adaptationAccessCheckPending
)
1280 * At this point the reply headers have been parsed and consumed.
1281 * That means header content has been removed from readBuf and
1282 * it contains only body data.
1284 if (flags
.chunked
) {
1285 if (!decodeAndWriteReplyBody()) {
1286 flags
.do_next_read
= 0;
1293 if (EBIT_TEST(entry
->flags
, ENTRY_ABORTED
)) {
1295 * The above writeReplyBody() call could ABORT this entry,
1296 * in that case, the server FD should already be closed.
1297 * there's nothing for us to do.
1301 switch (persistentConnStatus()) {
1302 case INCOMPLETE_MSG
:
1303 debugs(11, 5, "processReplyBody: INCOMPLETE_MSG");
1304 /* Wait for more data or EOF condition */
1305 if (flags
.keepalive_broken
) {
1307 commSetTimeout(fd
, 10, call
);
1310 commSetTimeout(fd
, Config
.Timeout
.read
, call
);
1313 flags
.do_next_read
= 1;
1316 case COMPLETE_PERSISTENT_MSG
:
1317 debugs(11, 5, "processReplyBody: COMPLETE_PERSISTENT_MSG");
1318 /* yes we have to clear all these! */
1320 commSetTimeout(fd
, -1, call
);
1321 flags
.do_next_read
= 0;
1323 comm_remove_close_handler(fd
, closeHandler
);
1324 closeHandler
= NULL
;
1325 fwd
->unregister(fd
);
1327 if (orig_request
->flags
.spoof_client_ip
)
1328 client_addr
= orig_request
->client_addr
;
1331 if (request
->flags
.pinned
) {
1333 } else if (request
->flags
.connection_auth
&& request
->flags
.auth_sent
) {
1337 if (orig_request
->pinnedConnection() && ispinned
) {
1338 orig_request
->pinnedConnection()->pinConnection(fd
, orig_request
, _peer
,
1339 (request
->flags
.connection_auth
!= 0));
1341 fwd
->pconnPush(fd
, _peer
, request
, orig_request
->GetHost(), client_addr
);
1349 case COMPLETE_NONPERSISTENT_MSG
:
1350 debugs(11, 5, "processReplyBody: COMPLETE_NONPERSISTENT_MSG");
1355 maybeReadVirginBody();
1359 HttpStateData::maybeReadVirginBody()
1361 // we may need to grow the buffer if headers do not fit
1362 const int minRead
= flags
.headers_parsed
? 0 :1024;
1363 const int read_size
= replyBodySpace(*readBuf
, minRead
);
1365 debugs(11,9, HERE
<< (flags
.do_next_read
? "may" : "wont") <<
1366 " read up to " << read_size
<< " bytes from FD " << fd
);
1369 * why <2? Because delayAwareRead() won't actually read if
1370 * you ask it to read 1 byte. The delayed read request
1371 * just gets re-queued until the client side drains, then
1372 * the I/O thread hangs. Better to not register any read
1373 * handler until we get a notification from someone that
1374 * its okay to read again.
1379 if (flags
.do_next_read
) {
1380 flags
.do_next_read
= 0;
1381 typedef CommCbMemFunT
<HttpStateData
, CommIoCbParams
> Dialer
;
1382 entry
->delayAwareRead(fd
, readBuf
->space(read_size
), read_size
,
1383 asyncCall(11, 5, "HttpStateData::readReply",
1384 Dialer(this, &HttpStateData::readReply
)));
1389 * This will be called when request write is complete.
1392 HttpStateData::sendComplete(const CommIoCbParams
&io
)
1394 debugs(11, 5, "httpSendComplete: FD " << fd
<< ": size " << io
.size
<< ": errflag " << io
.flag
<< ".");
1395 #if URL_CHECKSUM_DEBUG
1397 entry
->mem_obj
->checkUrlChecksum();
1401 fd_bytes(fd
, io
.size
, FD_WRITE
);
1402 kb_incr(&statCounter
.server
.all
.kbytes_out
, io
.size
);
1403 kb_incr(&statCounter
.server
.http
.kbytes_out
, io
.size
);
1406 if (io
.flag
== COMM_ERR_CLOSING
)
1411 err
= errorCon(ERR_WRITE_ERROR
, HTTP_BAD_GATEWAY
, fwd
->request
);
1412 err
->xerrno
= io
.xerrno
;
1419 * Set the read timeout here because it hasn't been set yet.
1420 * We only set the read timeout after the request has been
1421 * fully written to the server-side. If we start the timeout
1422 * after connection establishment, then we are likely to hit
1423 * the timeout for POST/PUT requests that have very large
1426 typedef CommCbMemFunT
<HttpStateData
, CommTimeoutCbParams
> TimeoutDialer
;
1427 AsyncCall::Pointer timeoutCall
= asyncCall(11, 5, "HttpStateData::httpTimeout",
1428 TimeoutDialer(this,&HttpStateData::httpTimeout
));
1430 commSetTimeout(fd
, Config
.Timeout
.read
, timeoutCall
);
1432 flags
.request_sent
= 1;
1434 orig_request
->hier
.peer_http_request_sent
= current_time
;
1437 // Close the HTTP server connection. Used by serverComplete().
1439 HttpStateData::closeServer()
1441 debugs(11,5, HERE
<< "closing HTTP server FD " << fd
<< " this " << this);
1444 fwd
->unregister(fd
);
1445 comm_remove_close_handler(fd
, closeHandler
);
1446 closeHandler
= NULL
;
1453 HttpStateData::doneWithServer() const
1460 * Fixup authentication request headers for special cases
1463 httpFixupAuthentication(HttpRequest
* request
, HttpRequest
* orig_request
, const HttpHeader
* hdr_in
, HttpHeader
* hdr_out
, http_state_flags flags
)
1465 http_hdr_type header
= flags
.originpeer
? HDR_AUTHORIZATION
: HDR_PROXY_AUTHORIZATION
;
1467 /* Nothing to do unless we are forwarding to a peer */
1468 if (!request
->flags
.proxying
)
1471 /* Needs to be explicitly enabled */
1472 if (!orig_request
->peer_login
)
1475 /* Maybe already dealt with? */
1476 if (hdr_out
->has(header
))
1479 /* Nothing to do here for PASSTHRU */
1480 if (strcmp(orig_request
->peer_login
, "PASSTHRU") == 0)
1483 /* PROXYPASS is a special case, single-signon to servers with the proxy password (basic only) */
1484 if (flags
.originpeer
&& strcmp(orig_request
->peer_login
, "PROXYPASS") == 0 && hdr_in
->has(HDR_PROXY_AUTHORIZATION
)) {
1485 const char *auth
= hdr_in
->getStr(HDR_PROXY_AUTHORIZATION
);
1487 if (auth
&& strncasecmp(auth
, "basic ", 6) == 0) {
1488 hdr_out
->putStr(header
, auth
);
1493 /* Special mode to pass the username to the upstream cache */
1494 if (*orig_request
->peer_login
== '*') {
1496 const char *username
= "-";
1498 if (orig_request
->extacl_user
.size())
1499 username
= orig_request
->extacl_user
.termedBuf();
1500 else if (orig_request
->auth_user_request
)
1501 username
= orig_request
->auth_user_request
->username();
1503 snprintf(loginbuf
, sizeof(loginbuf
), "%s%s", username
, orig_request
->peer_login
+ 1);
1505 httpHeaderPutStrf(hdr_out
, header
, "Basic %s",
1506 base64_encode(loginbuf
));
1510 /* external_acl provided credentials */
1511 if (orig_request
->extacl_user
.size() && orig_request
->extacl_passwd
.size() &&
1512 (strcmp(orig_request
->peer_login
, "PASS") == 0 ||
1513 strcmp(orig_request
->peer_login
, "PROXYPASS") == 0)) {
1515 snprintf(loginbuf
, sizeof(loginbuf
), SQUIDSTRINGPH
":" SQUIDSTRINGPH
,
1516 SQUIDSTRINGPRINT(orig_request
->extacl_user
),
1517 SQUIDSTRINGPRINT(orig_request
->extacl_passwd
));
1518 httpHeaderPutStrf(hdr_out
, header
, "Basic %s",
1519 base64_encode(loginbuf
));
1523 /* Kerberos login to peer */
1524 #if HAVE_KRB5 && HAVE_GSSAPI
1525 if (strncmp(orig_request
->peer_login
, "NEGOTIATE",strlen("NEGOTIATE")) == 0) {
1527 char *PrincipalName
=NULL
,*p
;
1528 if ((p
=strchr(orig_request
->peer_login
,':')) != NULL
) {
1531 Token
= peer_proxy_negotiate_auth(PrincipalName
,request
->peer_host
);
1533 httpHeaderPutStrf(hdr_out
, HDR_PROXY_AUTHORIZATION
, "Negotiate %s",Token
);
1537 #endif /* HAVE_KRB5 && HAVE_GSSAPI */
1539 httpHeaderPutStrf(hdr_out
, header
, "Basic %s",
1540 base64_encode(orig_request
->peer_login
));
1545 * build request headers and append them to a given MemBuf
1546 * used by buildRequestPrefix()
1547 * note: initialised the HttpHeader, the caller is responsible for Clean()-ing
1550 HttpStateData::httpBuildRequestHeader(HttpRequest
* request
,
1551 HttpRequest
* orig_request
,
1553 HttpHeader
* hdr_out
,
1554 http_state_flags flags
)
1556 /* building buffer for complex strings */
1557 #define BBUF_SZ (MAX_URL+32)
1558 LOCAL_ARRAY(char, bbuf
, BBUF_SZ
);
1559 LOCAL_ARRAY(char, ntoabuf
, MAX_IPSTRLEN
);
1560 const HttpHeader
*hdr_in
= &orig_request
->header
;
1561 const HttpHeaderEntry
*e
= NULL
;
1562 HttpHeaderPos pos
= HttpHeaderInitPos
;
1563 assert (hdr_out
->owner
== hoRequest
);
1565 /* append our IMS header */
1566 if (request
->lastmod
> -1)
1567 hdr_out
->putTime(HDR_IF_MODIFIED_SINCE
, request
->lastmod
);
1569 bool we_do_ranges
= decideIfWeDoRanges (orig_request
);
1571 String
strConnection (hdr_in
->getList(HDR_CONNECTION
));
1573 while ((e
= hdr_in
->getEntry(&pos
)))
1574 copyOneHeaderFromClientsideRequestToUpstreamRequest(e
, strConnection
, request
, orig_request
, hdr_out
, we_do_ranges
, flags
);
1576 /* Abstraction break: We should interpret multipart/byterange responses
1577 * into offset-length data, and this works around our inability to do so.
1579 if (!we_do_ranges
&& orig_request
->multipartRangeRequest()) {
1580 /* don't cache the result */
1581 orig_request
->flags
.cachable
= 0;
1582 /* pretend it's not a range request */
1583 delete orig_request
->range
;
1584 orig_request
->range
= NULL
;
1585 orig_request
->flags
.range
= 0;
1589 if (Config
.onoff
.via
) {
1591 strVia
= hdr_in
->getList(HDR_VIA
);
1592 snprintf(bbuf
, BBUF_SZ
, "%d.%d %s",
1593 orig_request
->http_ver
.major
,
1594 orig_request
->http_ver
.minor
, ThisCache
);
1595 strListAdd(&strVia
, bbuf
, ',');
1596 hdr_out
->putStr(HDR_VIA
, strVia
.termedBuf());
1601 if (orig_request
->flags
.accelerated
) {
1602 /* Append Surrogate-Capabilities */
1603 String
strSurrogate (hdr_in
->getList(HDR_SURROGATE_CAPABILITY
));
1604 snprintf(bbuf
, BBUF_SZ
, "%s=\"Surrogate/1.0 ESI/1.0\"",
1605 Config
.Accel
.surrogate_id
);
1606 strListAdd(&strSurrogate
, bbuf
, ',');
1607 hdr_out
->putStr(HDR_SURROGATE_CAPABILITY
, strSurrogate
.termedBuf());
1611 /** \pre Handle X-Forwarded-For */
1612 if (strcmp(opt_forwarded_for
, "delete") != 0) {
1614 String strFwd
= hdr_in
->getList(HDR_X_FORWARDED_FOR
);
1616 if (strFwd
.size() > 65536/2) {
1617 // There is probably a forwarding loop with Via detection disabled.
1618 // If we do nothing, String will assert on overflow soon.
1619 // TODO: Terminate all transactions with huge XFF?
1622 static int warnedCount
= 0;
1623 if (warnedCount
++ < 100) {
1624 const char *url
= entry
? entry
->url() : urlCanonical(orig_request
);
1625 debugs(11, 1, "Warning: likely forwarding loop with " << url
);
1629 if (strcmp(opt_forwarded_for
, "on") == 0) {
1630 /** If set to ON - append client IP or 'unknown'. */
1631 if ( orig_request
->client_addr
.IsNoAddr() )
1632 strListAdd(&strFwd
, "unknown", ',');
1634 strListAdd(&strFwd
, orig_request
->client_addr
.NtoA(ntoabuf
, MAX_IPSTRLEN
), ',');
1635 } else if (strcmp(opt_forwarded_for
, "off") == 0) {
1636 /** If set to OFF - append 'unknown'. */
1637 strListAdd(&strFwd
, "unknown", ',');
1638 } else if (strcmp(opt_forwarded_for
, "transparent") == 0) {
1639 /** If set to TRANSPARENT - pass through unchanged. */
1640 } else if (strcmp(opt_forwarded_for
, "truncate") == 0) {
1641 /** If set to TRUNCATE - drop existing list and replace with client IP or 'unknown'. */
1642 if ( orig_request
->client_addr
.IsNoAddr() )
1645 strFwd
= orig_request
->client_addr
.NtoA(ntoabuf
, MAX_IPSTRLEN
);
1647 if (strFwd
.size() > 0)
1648 hdr_out
->putStr(HDR_X_FORWARDED_FOR
, strFwd
.termedBuf());
1650 /** If set to DELETE - do not copy through. */
1652 /* append Host if not there already */
1653 if (!hdr_out
->has(HDR_HOST
)) {
1654 if (orig_request
->peer_domain
) {
1655 hdr_out
->putStr(HDR_HOST
, orig_request
->peer_domain
);
1656 } else if (orig_request
->port
== urlDefaultPort(orig_request
->protocol
)) {
1657 /* use port# only if not default */
1658 hdr_out
->putStr(HDR_HOST
, orig_request
->GetHost());
1660 httpHeaderPutStrf(hdr_out
, HDR_HOST
, "%s:%d",
1661 orig_request
->GetHost(),
1662 (int) orig_request
->port
);
1666 /* append Authorization if known in URL, not in header and going direct */
1667 if (!hdr_out
->has(HDR_AUTHORIZATION
)) {
1668 if (!request
->flags
.proxying
&& *request
->login
) {
1669 httpHeaderPutStrf(hdr_out
, HDR_AUTHORIZATION
, "Basic %s",
1670 base64_encode(request
->login
));
1674 /* Fixup (Proxy-)Authorization special cases. Plain relaying dealt with above */
1675 httpFixupAuthentication(request
, orig_request
, hdr_in
, hdr_out
, flags
);
1677 /* append Cache-Control, add max-age if not there already */
1679 HttpHdrCc
*cc
= hdr_in
->getCc();
1682 cc
= httpHdrCcCreate();
1684 #if 0 /* see bug 2330 */
1685 /* Set no-cache if determined needed but not found */
1686 if (orig_request
->flags
.nocache
)
1687 EBIT_SET(cc
->mask
, CC_NO_CACHE
);
1690 /* Add max-age only without no-cache */
1691 if (!EBIT_TEST(cc
->mask
, CC_MAX_AGE
) && !EBIT_TEST(cc
->mask
, CC_NO_CACHE
)) {
1693 entry
? entry
->url() : urlCanonical(orig_request
);
1694 httpHdrCcSetMaxAge(cc
, getMaxAge(url
));
1696 if (request
->urlpath
.size())
1697 assert(strstr(url
, request
->urlpath
.termedBuf()));
1700 /* Enforce sibling relations */
1701 if (flags
.only_if_cached
)
1702 EBIT_SET(cc
->mask
, CC_ONLY_IF_CACHED
);
1706 httpHdrCcDestroy(cc
);
1709 /* maybe append Connection: keep-alive */
1710 if (flags
.keepalive
) {
1711 if (flags
.proxying
) {
1712 hdr_out
->putStr(HDR_PROXY_CONNECTION
, "keep-alive");
1714 hdr_out
->putStr(HDR_CONNECTION
, "keep-alive");
1718 /* append Front-End-Https */
1719 if (flags
.front_end_https
) {
1720 if (flags
.front_end_https
== 1 || request
->protocol
== PROTO_HTTPS
)
1721 hdr_out
->putStr(HDR_FRONT_END_HTTPS
, "On");
1724 /* Now mangle the headers. */
1725 if (Config2
.onoff
.mangle_request_headers
)
1726 httpHdrMangleList(hdr_out
, request
, ROR_REQUEST
);
1728 strConnection
.clean();
1732 * Decides whether a particular header may be cloned from the received Clients request
1733 * to our outgoing fetch request.
1736 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
)
1738 debugs(11, 5, "httpBuildRequestHeader: " << e
->name
<< ": " << e
->value
);
1742 /** \par RFC 2616 sect 13.5.1 - Hop-by-Hop headers which Squid should not pass on. */
1744 case HDR_PROXY_AUTHORIZATION
:
1745 /** \par Proxy-Authorization:
1746 * Only pass on proxy authentication to peers for which
1747 * authentication forwarding is explicitly enabled
1749 if (!flags
.originpeer
&& flags
.proxying
&& orig_request
->peer_login
&&
1750 (strcmp(orig_request
->peer_login
, "PASS") == 0 ||
1751 strcmp(orig_request
->peer_login
, "PROXYPASS") == 0 ||
1752 strcmp(orig_request
->peer_login
, "PASSTHRU") == 0)) {
1753 hdr_out
->addEntry(e
->clone());
1757 /** \par RFC 2616 sect 13.5.1 - Hop-by-Hop headers which Squid does not pass on. */
1759 case HDR_CONNECTION
: /** \par Connection: */
1760 case HDR_TE
: /** \par TE: */
1761 case HDR_KEEP_ALIVE
: /** \par Keep-Alive: */
1762 case HDR_PROXY_AUTHENTICATE
: /** \par Proxy-Authenticate: */
1763 case HDR_TRAILERS
: /** \par Trailers: */
1764 case HDR_UPGRADE
: /** \par Upgrade: */
1765 case HDR_TRANSFER_ENCODING
: /** \par Transfer-Encoding: */
1769 /** \par OTHER headers I haven't bothered to track down yet. */
1771 case HDR_AUTHORIZATION
:
1772 /** \par WWW-Authorization:
1773 * Pass on WWW authentication */
1775 if (!flags
.originpeer
) {
1776 hdr_out
->addEntry(e
->clone());
1778 /** \note In accelerators, only forward authentication if enabled
1779 * (see also httpFixupAuthentication for special cases)
1781 if (orig_request
->peer_login
&&
1782 (strcmp(orig_request
->peer_login
, "PASS") == 0 ||
1783 strcmp(orig_request
->peer_login
, "PASSTHRU") == 0 ||
1784 strcmp(orig_request
->peer_login
, "PROXYPASS") == 0)) {
1785 hdr_out
->addEntry(e
->clone());
1793 * Normally Squid rewrites the Host: header.
1794 * However, there is one case when we don't: If the URL
1795 * went through our redirector and the admin configured
1796 * 'redir_rewrites_host' to be off.
1798 if (orig_request
->peer_domain
)
1799 hdr_out
->putStr(HDR_HOST
, orig_request
->peer_domain
);
1800 else if (request
->flags
.redirected
&& !Config
.onoff
.redir_rewrites_host
)
1801 hdr_out
->addEntry(e
->clone());
1803 /* use port# only if not default */
1805 if (orig_request
->port
== urlDefaultPort(orig_request
->protocol
)) {
1806 hdr_out
->putStr(HDR_HOST
, orig_request
->GetHost());
1808 httpHeaderPutStrf(hdr_out
, HDR_HOST
, "%s:%d",
1809 orig_request
->GetHost(),
1810 (int) orig_request
->port
);
1816 case HDR_IF_MODIFIED_SINCE
:
1817 /** \par If-Modified-Since:
1818 * append unless we added our own;
1819 * \note at most one client's ims header can pass through */
1821 if (!hdr_out
->has(HDR_IF_MODIFIED_SINCE
))
1822 hdr_out
->addEntry(e
->clone());
1826 case HDR_MAX_FORWARDS
:
1827 /** \par Max-Forwards:
1828 * pass only on TRACE or OPTIONS requests */
1829 if (orig_request
->method
== METHOD_TRACE
|| orig_request
->method
== METHOD_OPTIONS
) {
1830 const int64_t hops
= e
->getInt64();
1833 hdr_out
->putInt64(HDR_MAX_FORWARDS
, hops
- 1);
1840 * If Via is disabled then forward any received header as-is.
1841 * Otherwise leave for explicit updated addition later. */
1843 if (!Config
.onoff
.via
)
1844 hdr_out
->addEntry(e
->clone());
1852 case HDR_REQUEST_RANGE
:
1853 /** \par Range:, If-Range:, Request-Range:
1854 * Only pass if we accept ranges */
1856 hdr_out
->addEntry(e
->clone());
1860 case HDR_PROXY_CONNECTION
:
1862 case HDR_X_FORWARDED_FOR
:
1864 case HDR_CACHE_CONTROL
:
1865 /** \par Proxy-Connaction:, X-Forwarded-For:, Cache-Control:
1866 * handled specially by Squid, so leave off for now.
1867 * append these after the loop if needed */
1870 case HDR_FRONT_END_HTTPS
:
1871 /** \par Front-End-Https:
1872 * Pass thru only if peer is configured with front-end-https */
1873 if (!flags
.front_end_https
)
1874 hdr_out
->addEntry(e
->clone());
1880 * pass on all other header fields
1881 * which are NOT listed by the special Connection: header. */
1883 if (strConnection
.size()>0 && strListIsMember(&strConnection
, e
->name
.termedBuf(), ',')) {
1884 debugs(11, 2, "'" << e
->name
<< "' header cropped by Connection: definition");
1888 hdr_out
->addEntry(e
->clone());
1893 HttpStateData::decideIfWeDoRanges (HttpRequest
* orig_request
)
1896 /* decide if we want to do Ranges ourselves
1897 * and fetch the whole object now)
1898 * We want to handle Ranges ourselves iff
1899 * - we can actually parse client Range specs
1900 * - the specs are expected to be simple enough (e.g. no out-of-order ranges)
1901 * - reply will be cachable
1902 * (If the reply will be uncachable we have to throw it away after
1903 * serving this request, so it is better to forward ranges to
1904 * the server and fetch only the requested content)
1907 if (NULL
== orig_request
->range
|| !orig_request
->flags
.cachable
1908 || orig_request
->range
->offsetLimitExceeded() || orig_request
->flags
.connection_auth
)
1911 debugs(11, 8, "decideIfWeDoRanges: range specs: " <<
1912 orig_request
->range
<< ", cachable: " <<
1913 orig_request
->flags
.cachable
<< "; we_do_ranges: " << result
);
1918 /* build request prefix and append it to a given MemBuf;
1919 * return the length of the prefix */
1921 HttpStateData::buildRequestPrefix(HttpRequest
* aRequest
,
1922 HttpRequest
* original_request
,
1923 StoreEntry
* sentry
,
1925 http_state_flags stateFlags
)
1927 const int offset
= mb
->size
;
1928 HttpVersion
httpver(1,0);
1929 mb
->Printf("%s %s HTTP/%d.%d\r\n",
1930 RequestMethodStr(aRequest
->method
),
1931 aRequest
->urlpath
.size() ? aRequest
->urlpath
.termedBuf() : "/",
1932 httpver
.major
,httpver
.minor
);
1933 /* build and pack headers */
1935 HttpHeader
hdr(hoRequest
);
1937 httpBuildRequestHeader(aRequest
, original_request
, sentry
, &hdr
, stateFlags
);
1939 if (aRequest
->flags
.pinned
&& aRequest
->flags
.connection_auth
)
1940 aRequest
->flags
.auth_sent
= 1;
1941 else if (hdr
.has(HDR_AUTHORIZATION
))
1942 aRequest
->flags
.auth_sent
= 1;
1944 packerToMemInit(&p
, mb
);
1949 /* append header terminator */
1950 mb
->append(crlf
, 2);
1951 return mb
->size
- offset
;
1954 /* This will be called when connect completes. Write request. */
1956 HttpStateData::sendRequest()
1960 debugs(11, 5, "httpSendRequest: FD " << fd
<< ", request " << request
<< ", this " << this << ".");
1961 typedef CommCbMemFunT
<HttpStateData
, CommTimeoutCbParams
> TimeoutDialer
;
1962 AsyncCall::Pointer timeoutCall
= asyncCall(11, 5, "HttpStateData::httpTimeout",
1963 TimeoutDialer(this,&HttpStateData::httpTimeout
));
1964 commSetTimeout(fd
, Config
.Timeout
.lifetime
, timeoutCall
);
1965 flags
.do_next_read
= 1;
1966 maybeReadVirginBody();
1968 if (orig_request
->body_pipe
!= NULL
) {
1969 if (!startRequestBodyFlow()) // register to receive body data
1971 typedef CommCbMemFunT
<HttpStateData
, CommIoCbParams
> Dialer
;
1972 Dialer
dialer(this, &HttpStateData::sentRequestBody
);
1973 requestSender
= asyncCall(11,5, "HttpStateData::sentRequestBody", dialer
);
1975 assert(!requestBodySource
);
1976 typedef CommCbMemFunT
<HttpStateData
, CommIoCbParams
> Dialer
;
1977 Dialer
dialer(this, &HttpStateData::sendComplete
);
1978 requestSender
= asyncCall(11,5, "HttpStateData::SendComplete", dialer
);
1981 if (_peer
!= NULL
) {
1982 if (_peer
->options
.originserver
) {
1984 flags
.originpeer
= 1;
1987 flags
.originpeer
= 0;
1991 flags
.originpeer
= 0;
1995 * Is keep-alive okay for all request methods?
1997 if (orig_request
->flags
.must_keepalive
)
1998 flags
.keepalive
= 1;
1999 else if (!Config
.onoff
.server_pconns
)
2000 flags
.keepalive
= 0;
2001 else if (_peer
== NULL
)
2002 flags
.keepalive
= 1;
2003 else if (_peer
->stats
.n_keepalives_sent
< 10)
2004 flags
.keepalive
= 1;
2005 else if ((double) _peer
->stats
.n_keepalives_recv
/
2006 (double) _peer
->stats
.n_keepalives_sent
> 0.50)
2007 flags
.keepalive
= 1;
2010 if (neighborType(_peer
, request
) == PEER_SIBLING
&&
2011 !_peer
->options
.allow_miss
)
2012 flags
.only_if_cached
= 1;
2014 flags
.front_end_https
= _peer
->front_end_https
;
2018 request
->peer_host
=_peer
?_peer
->host
:NULL
;
2019 buildRequestPrefix(request
, orig_request
, entry
, &mb
, flags
);
2020 debugs(11, 6, "httpSendRequest: FD " << fd
<< ":\n" << mb
.buf
);
2021 comm_write_mbuf(fd
, &mb
, requestSender
);
2027 httpStart(FwdState
*fwd
)
2029 debugs(11, 3, "httpStart: \"" << RequestMethodStr(fwd
->request
->method
) << " " << fwd
->entry
->url() << "\"" );
2030 HttpStateData
*httpState
= new HttpStateData(fwd
);
2032 if (!httpState
->sendRequest()) {
2033 debugs(11, 3, "httpStart: aborted");
2038 statCounter
.server
.all
.requests
++;
2039 statCounter
.server
.http
.requests
++;
2042 * We used to set the read timeout here, but not any more.
2043 * Now its set in httpSendComplete() after the full request,
2044 * including request body, has been written to the server.
2049 HttpStateData::doneSendingRequestBody()
2051 debugs(11,5, HERE
<< "doneSendingRequestBody: FD " << fd
);
2054 if (Config
.accessList
.brokenPosts
) {
2055 ACLFilledChecklist
ch(Config
.accessList
.brokenPosts
, request
, NULL
);
2056 if (!ch
.fastCheck()) {
2057 debugs(11, 5, "doneSendingRequestBody: didn't match brokenPosts");
2058 CommIoCbParams
io(NULL
);
2063 debugs(11, 2, "doneSendingRequestBody: matched brokenPosts");
2064 typedef CommCbMemFunT
<HttpStateData
, CommIoCbParams
> Dialer
;
2065 Dialer
dialer(this, &HttpStateData::sendComplete
);
2066 AsyncCall::Pointer call
= asyncCall(11,5, "HttpStateData::SendComplete", dialer
);
2067 comm_write(fd
, "\r\n", 2, call
);
2071 debugs(11, 5, "doneSendingRequestBody: No brokenPosts list");
2072 #endif /* HTTP_VIOLATIONS */
2074 CommIoCbParams
io(NULL
);
2080 // more origin request body data is available
2082 HttpStateData::handleMoreRequestBodyAvailable()
2084 if (eof
|| fd
< 0) {
2085 // XXX: we should check this condition in other callbacks then!
2086 // TODO: Check whether this can actually happen: We should unsubscribe
2087 // as a body consumer when the above condition(s) are detected.
2088 debugs(11, 1, HERE
<< "Transaction aborted while reading HTTP body");
2092 assert(requestBodySource
!= NULL
);
2094 if (requestBodySource
->buf().hasContent()) {
2095 // XXX: why does not this trigger a debug message on every request?
2097 if (flags
.headers_parsed
&& !flags
.abuse_detected
) {
2098 flags
.abuse_detected
= 1;
2099 debugs(11, 1, "http handleMoreRequestBodyAvailable: Likely proxy abuse detected '" << orig_request
->client_addr
<< "' -> '" << entry
->url() << "'" );
2101 if (virginReply()->sline
.status
== HTTP_INVALID_HEADER
) {
2108 HttpStateData::handleMoreRequestBodyAvailable();
2111 // premature end of the request body
2113 HttpStateData::handleRequestBodyProducerAborted()
2115 ServerStateData::handleRequestBodyProducerAborted();
2116 // XXX: SendComplete(COMM_ERR_CLOSING) does little. Is it enough?
2117 CommIoCbParams
io(NULL
);
2119 io
.flag
=COMM_ERR_CLOSING
;
2123 // called when we wrote request headers(!) or a part of the body
2125 HttpStateData::sentRequestBody(const CommIoCbParams
&io
)
2128 kb_incr(&statCounter
.server
.http
.kbytes_out
, io
.size
);
2130 ServerStateData::sentRequestBody(io
);
2133 // Quickly abort the transaction
2134 // TODO: destruction should be sufficient as the destructor should cleanup,
2135 // including canceling close handlers
2137 HttpStateData::abortTransaction(const char *reason
)
2139 debugs(11,5, HERE
<< "aborting transaction for " << reason
<<
2140 "; FD " << fd
<< ", this " << this);
2147 fwd
->handleUnregisteredServerEnd();
2148 deleteThis("HttpStateData::abortTransaction");
2153 httpBuildVersion(HttpVersion
* version
, unsigned int major
, unsigned int minor
)
2155 version
->major
= major
;
2156 version
->minor
= minor
;
2161 HttpStateData::originalRequest()
2163 return orig_request
;