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1 | /* | |
2 | * Copyright (C) 1996-2015 The Squid Software Foundation and contributors | |
3 | * | |
4 | * Squid software is distributed under GPLv2+ license and includes | |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
7 | */ | |
8 | ||
9 | /* DEBUG: section 11 Hypertext Transfer Protocol (HTTP) */ | |
10 | ||
11 | /* | |
12 | * Anonymizing patch by lutz@as-node.jena.thur.de | |
13 | * have a look into http-anon.c to get more informations. | |
14 | */ | |
15 | ||
16 | #include "squid.h" | |
17 | #include "acl/FilledChecklist.h" | |
18 | #include "base/AsyncJobCalls.h" | |
19 | #include "base/TextException.h" | |
20 | #include "base64.h" | |
21 | #include "CachePeer.h" | |
22 | #include "client_side.h" | |
23 | #include "comm/Connection.h" | |
24 | #include "comm/Read.h" | |
25 | #include "comm/Write.h" | |
26 | #include "CommRead.h" | |
27 | #include "err_detail_type.h" | |
28 | #include "errorpage.h" | |
29 | #include "fd.h" | |
30 | #include "fde.h" | |
31 | #include "globals.h" | |
32 | #include "http.h" | |
33 | #include "http/one/ResponseParser.h" | |
34 | #include "http/one/TeChunkedParser.h" | |
35 | #include "HttpControlMsg.h" | |
36 | #include "HttpHdrCc.h" | |
37 | #include "HttpHdrContRange.h" | |
38 | #include "HttpHdrSc.h" | |
39 | #include "HttpHdrScTarget.h" | |
40 | #include "HttpHeaderTools.h" | |
41 | #include "HttpReply.h" | |
42 | #include "HttpRequest.h" | |
43 | #include "HttpStateFlags.h" | |
44 | #include "log/access_log.h" | |
45 | #include "MemBuf.h" | |
46 | #include "MemObject.h" | |
47 | #include "neighbors.h" | |
48 | #include "peer_proxy_negotiate_auth.h" | |
49 | #include "profiler/Profiler.h" | |
50 | #include "refresh.h" | |
51 | #include "RefreshPattern.h" | |
52 | #include "rfc1738.h" | |
53 | #include "SquidConfig.h" | |
54 | #include "SquidTime.h" | |
55 | #include "StatCounters.h" | |
56 | #include "Store.h" | |
57 | #include "StrList.h" | |
58 | #include "tools.h" | |
59 | #include "URL.h" | |
60 | #include "util.h" | |
61 | ||
62 | #if USE_AUTH | |
63 | #include "auth/UserRequest.h" | |
64 | #endif | |
65 | #if USE_DELAY_POOLS | |
66 | #include "DelayPools.h" | |
67 | #endif | |
68 | ||
69 | #define SQUID_ENTER_THROWING_CODE() try { | |
70 | #define SQUID_EXIT_THROWING_CODE(status) \ | |
71 | status = true; \ | |
72 | } \ | |
73 | catch (const std::exception &e) { \ | |
74 | debugs (11, 1, "Exception error:" << e.what()); \ | |
75 | status = false; \ | |
76 | } | |
77 | ||
78 | CBDATA_CLASS_INIT(HttpStateData); | |
79 | ||
80 | static const char *const crlf = "\r\n"; | |
81 | ||
82 | static void httpMaybeRemovePublic(StoreEntry *, Http::StatusCode); | |
83 | static void copyOneHeaderFromClientsideRequestToUpstreamRequest(const HttpHeaderEntry *e, const String strConnection, const HttpRequest * request, | |
84 | HttpHeader * hdr_out, const int we_do_ranges, const HttpStateFlags &); | |
85 | //Declared in HttpHeaderTools.cc | |
86 | void httpHdrAdd(HttpHeader *heads, HttpRequest *request, const AccessLogEntryPointer &al, HeaderWithAclList &headers_add); | |
87 | ||
88 | HttpStateData::HttpStateData(FwdState *theFwdState) : | |
89 | AsyncJob("HttpStateData"), | |
90 | Client(theFwdState), | |
91 | lastChunk(0), | |
92 | httpChunkDecoder(NULL), | |
93 | payloadSeen(0), | |
94 | payloadTruncated(0) | |
95 | { | |
96 | debugs(11,5,HERE << "HttpStateData " << this << " created"); | |
97 | ignoreCacheControl = false; | |
98 | surrogateNoStore = false; | |
99 | serverConnection = fwd->serverConnection(); | |
100 | ||
101 | // reset peer response time stats for %<pt | |
102 | request->hier.peer_http_request_sent.tv_sec = 0; | |
103 | request->hier.peer_http_request_sent.tv_usec = 0; | |
104 | ||
105 | if (fwd->serverConnection() != NULL) | |
106 | _peer = cbdataReference(fwd->serverConnection()->getPeer()); /* might be NULL */ | |
107 | ||
108 | if (_peer) { | |
109 | request->flags.proxying = true; | |
110 | /* | |
111 | * This NEIGHBOR_PROXY_ONLY check probably shouldn't be here. | |
112 | * We might end up getting the object from somewhere else if, | |
113 | * for example, the request to this neighbor fails. | |
114 | */ | |
115 | if (_peer->options.proxy_only) | |
116 | entry->releaseRequest(); | |
117 | ||
118 | #if USE_DELAY_POOLS | |
119 | entry->setNoDelay(_peer->options.no_delay); | |
120 | #endif | |
121 | } | |
122 | ||
123 | /* | |
124 | * register the handler to free HTTP state data when the FD closes | |
125 | */ | |
126 | typedef CommCbMemFunT<HttpStateData, CommCloseCbParams> Dialer; | |
127 | closeHandler = JobCallback(9, 5, Dialer, this, HttpStateData::httpStateConnClosed); | |
128 | comm_add_close_handler(serverConnection->fd, closeHandler); | |
129 | } | |
130 | ||
131 | HttpStateData::~HttpStateData() | |
132 | { | |
133 | /* | |
134 | * don't forget that ~Client() gets called automatically | |
135 | */ | |
136 | ||
137 | if (httpChunkDecoder) | |
138 | delete httpChunkDecoder; | |
139 | ||
140 | cbdataReferenceDone(_peer); | |
141 | ||
142 | debugs(11,5, HERE << "HttpStateData " << this << " destroyed; " << serverConnection); | |
143 | } | |
144 | ||
145 | const Comm::ConnectionPointer & | |
146 | HttpStateData::dataConnection() const | |
147 | { | |
148 | return serverConnection; | |
149 | } | |
150 | ||
151 | void | |
152 | HttpStateData::httpStateConnClosed(const CommCloseCbParams ¶ms) | |
153 | { | |
154 | debugs(11, 5, "httpStateFree: FD " << params.fd << ", httpState=" << params.data); | |
155 | mustStop("HttpStateData::httpStateConnClosed"); | |
156 | } | |
157 | ||
158 | void | |
159 | HttpStateData::httpTimeout(const CommTimeoutCbParams &) | |
160 | { | |
161 | debugs(11, 4, serverConnection << ": '" << entry->url() << "'"); | |
162 | ||
163 | if (entry->store_status == STORE_PENDING) { | |
164 | fwd->fail(new ErrorState(ERR_READ_TIMEOUT, Http::scGatewayTimeout, fwd->request)); | |
165 | } | |
166 | ||
167 | serverConnection->close(); | |
168 | } | |
169 | ||
170 | /// Remove an existing public store entry if the incoming response (to be | |
171 | /// stored in a currently private entry) is going to invalidate it. | |
172 | static void | |
173 | httpMaybeRemovePublic(StoreEntry * e, Http::StatusCode status) | |
174 | { | |
175 | int remove = 0; | |
176 | int forbidden = 0; | |
177 | StoreEntry *pe; | |
178 | ||
179 | // If the incoming response already goes into a public entry, then there is | |
180 | // nothing to remove. This protects ready-for-collapsing entries as well. | |
181 | if (!EBIT_TEST(e->flags, KEY_PRIVATE)) | |
182 | return; | |
183 | ||
184 | switch (status) { | |
185 | ||
186 | case Http::scOkay: | |
187 | ||
188 | case Http::scNonAuthoritativeInformation: | |
189 | ||
190 | case Http::scMultipleChoices: | |
191 | ||
192 | case Http::scMovedPermanently: | |
193 | ||
194 | case Http::scFound: | |
195 | ||
196 | case Http::scGone: | |
197 | ||
198 | case Http::scNotFound: | |
199 | remove = 1; | |
200 | ||
201 | break; | |
202 | ||
203 | case Http::scForbidden: | |
204 | ||
205 | case Http::scMethodNotAllowed: | |
206 | forbidden = 1; | |
207 | ||
208 | break; | |
209 | ||
210 | #if WORK_IN_PROGRESS | |
211 | ||
212 | case Http::scUnauthorized: | |
213 | forbidden = 1; | |
214 | ||
215 | break; | |
216 | ||
217 | #endif | |
218 | ||
219 | default: | |
220 | #if QUESTIONABLE | |
221 | /* | |
222 | * Any 2xx response should eject previously cached entities... | |
223 | */ | |
224 | ||
225 | if (status >= 200 && status < 300) | |
226 | remove = 1; | |
227 | ||
228 | #endif | |
229 | ||
230 | break; | |
231 | } | |
232 | ||
233 | if (!remove && !forbidden) | |
234 | return; | |
235 | ||
236 | assert(e->mem_obj); | |
237 | ||
238 | if (e->mem_obj->request) | |
239 | pe = storeGetPublicByRequest(e->mem_obj->request); | |
240 | else | |
241 | pe = storeGetPublic(e->mem_obj->storeId(), e->mem_obj->method); | |
242 | ||
243 | if (pe != NULL) { | |
244 | assert(e != pe); | |
245 | #if USE_HTCP | |
246 | neighborsHtcpClear(e, NULL, e->mem_obj->request, e->mem_obj->method, HTCP_CLR_INVALIDATION); | |
247 | #endif | |
248 | pe->release(); | |
249 | } | |
250 | ||
251 | /** \par | |
252 | * Also remove any cached HEAD response in case the object has | |
253 | * changed. | |
254 | */ | |
255 | if (e->mem_obj->request) | |
256 | pe = storeGetPublicByRequestMethod(e->mem_obj->request, Http::METHOD_HEAD); | |
257 | else | |
258 | pe = storeGetPublic(e->mem_obj->storeId(), Http::METHOD_HEAD); | |
259 | ||
260 | if (pe != NULL) { | |
261 | assert(e != pe); | |
262 | #if USE_HTCP | |
263 | neighborsHtcpClear(e, NULL, e->mem_obj->request, HttpRequestMethod(Http::METHOD_HEAD), HTCP_CLR_INVALIDATION); | |
264 | #endif | |
265 | pe->release(); | |
266 | } | |
267 | } | |
268 | ||
269 | void | |
270 | HttpStateData::processSurrogateControl(HttpReply *reply) | |
271 | { | |
272 | if (request->flags.accelerated && reply->surrogate_control) { | |
273 | HttpHdrScTarget *sctusable = reply->surrogate_control->getMergedTarget(Config.Accel.surrogate_id); | |
274 | ||
275 | if (sctusable) { | |
276 | if (sctusable->noStore() || | |
277 | (Config.onoff.surrogate_is_remote | |
278 | && sctusable->noStoreRemote())) { | |
279 | surrogateNoStore = true; | |
280 | entry->makePrivate(); | |
281 | } | |
282 | ||
283 | /* The HttpHeader logic cannot tell if the header it's parsing is a reply to an | |
284 | * accelerated request or not... | |
285 | * Still, this is an abstraction breach. - RC | |
286 | */ | |
287 | if (sctusable->hasMaxAge()) { | |
288 | if (sctusable->maxAge() < sctusable->maxStale()) | |
289 | reply->expires = reply->date + sctusable->maxAge(); | |
290 | else | |
291 | reply->expires = reply->date + sctusable->maxStale(); | |
292 | ||
293 | /* And update the timestamps */ | |
294 | entry->timestampsSet(); | |
295 | } | |
296 | ||
297 | /* We ignore cache-control directives as per the Surrogate specification */ | |
298 | ignoreCacheControl = true; | |
299 | ||
300 | delete sctusable; | |
301 | } | |
302 | } | |
303 | } | |
304 | ||
305 | int | |
306 | HttpStateData::cacheableReply() | |
307 | { | |
308 | HttpReply const *rep = finalReply(); | |
309 | HttpHeader const *hdr = &rep->header; | |
310 | const char *v; | |
311 | #if USE_HTTP_VIOLATIONS | |
312 | ||
313 | const RefreshPattern *R = NULL; | |
314 | ||
315 | /* This strange looking define first looks up the refresh pattern | |
316 | * and then checks if the specified flag is set. The main purpose | |
317 | * of this is to simplify the refresh pattern lookup and USE_HTTP_VIOLATIONS | |
318 | * condition | |
319 | */ | |
320 | #define REFRESH_OVERRIDE(flag) \ | |
321 | ((R = (R ? R : refreshLimits(entry->mem_obj->storeId()))) , \ | |
322 | (R && R->flags.flag)) | |
323 | #else | |
324 | #define REFRESH_OVERRIDE(flag) 0 | |
325 | #endif | |
326 | ||
327 | if (EBIT_TEST(entry->flags, RELEASE_REQUEST)) { | |
328 | debugs(22, 3, "NO because " << *entry << " has been released."); | |
329 | return 0; | |
330 | } | |
331 | ||
332 | // Check for Surrogate/1.0 protocol conditions | |
333 | // NP: reverse-proxy traffic our parent server has instructed us never to cache | |
334 | if (surrogateNoStore) { | |
335 | debugs(22, 3, HERE << "NO because Surrogate-Control:no-store"); | |
336 | return 0; | |
337 | } | |
338 | ||
339 | // RFC 2616: HTTP/1.1 Cache-Control conditions | |
340 | if (!ignoreCacheControl) { | |
341 | // XXX: check to see if the request headers alone were enough to prevent caching earlier | |
342 | // (ie no-store request header) no need to check those all again here if so. | |
343 | // for now we are not reliably doing that so we waste CPU re-checking request CC | |
344 | ||
345 | // RFC 2616 section 14.9.2 - MUST NOT cache any response with request CC:no-store | |
346 | if (request && request->cache_control && request->cache_control->noStore() && | |
347 | !REFRESH_OVERRIDE(ignore_no_store)) { | |
348 | debugs(22, 3, HERE << "NO because client request Cache-Control:no-store"); | |
349 | return 0; | |
350 | } | |
351 | ||
352 | // NP: request CC:no-cache only means cache READ is forbidden. STORE is permitted. | |
353 | if (rep->cache_control && rep->cache_control->hasNoCache() && rep->cache_control->noCache().size() > 0) { | |
354 | /* TODO: we are allowed to cache when no-cache= has parameters. | |
355 | * Provided we strip away any of the listed headers unless they are revalidated | |
356 | * successfully (ie, must revalidate AND these headers are prohibited on stale replies). | |
357 | * That is a bit tricky for squid right now so we avoid caching entirely. | |
358 | */ | |
359 | debugs(22, 3, HERE << "NO because server reply Cache-Control:no-cache has parameters"); | |
360 | return 0; | |
361 | } | |
362 | ||
363 | // NP: request CC:private is undefined. We ignore. | |
364 | // NP: other request CC flags are limiters on HIT/MISS. We don't care about here. | |
365 | ||
366 | // RFC 2616 section 14.9.2 - MUST NOT cache any response with CC:no-store | |
367 | if (rep->cache_control && rep->cache_control->noStore() && | |
368 | !REFRESH_OVERRIDE(ignore_no_store)) { | |
369 | debugs(22, 3, HERE << "NO because server reply Cache-Control:no-store"); | |
370 | return 0; | |
371 | } | |
372 | ||
373 | // RFC 2616 section 14.9.1 - MUST NOT cache any response with CC:private in a shared cache like Squid. | |
374 | // CC:private overrides CC:public when both are present in a response. | |
375 | // TODO: add a shared/private cache configuration possibility. | |
376 | if (rep->cache_control && | |
377 | rep->cache_control->hasPrivate() && | |
378 | !REFRESH_OVERRIDE(ignore_private)) { | |
379 | /* TODO: we are allowed to cache when private= has parameters. | |
380 | * Provided we strip away any of the listed headers unless they are revalidated | |
381 | * successfully (ie, must revalidate AND these headers are prohibited on stale replies). | |
382 | * That is a bit tricky for squid right now so we avoid caching entirely. | |
383 | */ | |
384 | debugs(22, 3, HERE << "NO because server reply Cache-Control:private"); | |
385 | return 0; | |
386 | } | |
387 | } | |
388 | ||
389 | // RFC 2068, sec 14.9.4 - MUST NOT cache any response with Authentication UNLESS certain CC controls are present | |
390 | // allow HTTP violations to IGNORE those controls (ie re-block caching Auth) | |
391 | if (request && (request->flags.auth || request->flags.authSent)) { | |
392 | if (!rep->cache_control) { | |
393 | debugs(22, 3, HERE << "NO because Authenticated and server reply missing Cache-Control"); | |
394 | return 0; | |
395 | } | |
396 | ||
397 | if (ignoreCacheControl) { | |
398 | debugs(22, 3, HERE << "NO because Authenticated and ignoring Cache-Control"); | |
399 | return 0; | |
400 | } | |
401 | ||
402 | bool mayStore = false; | |
403 | // HTTPbis pt6 section 3.2: a response CC:public is present | |
404 | if (rep->cache_control->Public()) { | |
405 | debugs(22, 3, HERE << "Authenticated but server reply Cache-Control:public"); | |
406 | mayStore = true; | |
407 | ||
408 | // HTTPbis pt6 section 3.2: a response CC:must-revalidate is present | |
409 | } else if (rep->cache_control->mustRevalidate()) { | |
410 | debugs(22, 3, HERE << "Authenticated but server reply Cache-Control:must-revalidate"); | |
411 | mayStore = true; | |
412 | ||
413 | #if USE_HTTP_VIOLATIONS | |
414 | // NP: given the must-revalidate exception we should also be able to exempt no-cache. | |
415 | // HTTPbis WG verdict on this is that it is omitted from the spec due to being 'unexpected' by | |
416 | // some. The caching+revalidate is not exactly unsafe though with Squids interpretation of no-cache | |
417 | // (without parameters) as equivalent to must-revalidate in the reply. | |
418 | } else if (rep->cache_control->hasNoCache() && rep->cache_control->noCache().size() == 0) { | |
419 | debugs(22, 3, HERE << "Authenticated but server reply Cache-Control:no-cache (equivalent to must-revalidate)"); | |
420 | mayStore = true; | |
421 | #endif | |
422 | ||
423 | // HTTPbis pt6 section 3.2: a response CC:s-maxage is present | |
424 | } else if (rep->cache_control->sMaxAge()) { | |
425 | debugs(22, 3, HERE << "Authenticated but server reply Cache-Control:s-maxage"); | |
426 | mayStore = true; | |
427 | } | |
428 | ||
429 | if (!mayStore) { | |
430 | debugs(22, 3, HERE << "NO because Authenticated transaction"); | |
431 | return 0; | |
432 | } | |
433 | ||
434 | // NP: response CC:no-cache is equivalent to CC:must-revalidate,max-age=0. We MAY cache, and do so. | |
435 | // NP: other request CC flags are limiters on HIT/MISS/REFRESH. We don't care about here. | |
436 | } | |
437 | ||
438 | /* HACK: The "multipart/x-mixed-replace" content type is used for | |
439 | * continuous push replies. These are generally dynamic and | |
440 | * probably should not be cachable | |
441 | */ | |
442 | if ((v = hdr->getStr(Http::HdrType::CONTENT_TYPE))) | |
443 | if (!strncasecmp(v, "multipart/x-mixed-replace", 25)) { | |
444 | debugs(22, 3, HERE << "NO because Content-Type:multipart/x-mixed-replace"); | |
445 | return 0; | |
446 | } | |
447 | ||
448 | switch (rep->sline.status()) { | |
449 | /* Responses that are cacheable */ | |
450 | ||
451 | case Http::scOkay: | |
452 | ||
453 | case Http::scNonAuthoritativeInformation: | |
454 | ||
455 | case Http::scMultipleChoices: | |
456 | ||
457 | case Http::scMovedPermanently: | |
458 | case Http::scPermanentRedirect: | |
459 | ||
460 | case Http::scGone: | |
461 | /* | |
462 | * Don't cache objects that need to be refreshed on next request, | |
463 | * unless we know how to refresh it. | |
464 | */ | |
465 | ||
466 | if (!refreshIsCachable(entry) && !REFRESH_OVERRIDE(store_stale)) { | |
467 | debugs(22, 3, "NO because refreshIsCachable() returned non-cacheable.."); | |
468 | return 0; | |
469 | } else { | |
470 | debugs(22, 3, HERE << "YES because HTTP status " << rep->sline.status()); | |
471 | return 1; | |
472 | } | |
473 | /* NOTREACHED */ | |
474 | break; | |
475 | ||
476 | /* Responses that only are cacheable if the server says so */ | |
477 | ||
478 | case Http::scFound: | |
479 | case Http::scTemporaryRedirect: | |
480 | if (rep->date <= 0) { | |
481 | debugs(22, 3, HERE << "NO because HTTP status " << rep->sline.status() << " and Date missing/invalid"); | |
482 | return 0; | |
483 | } | |
484 | if (rep->expires > rep->date) { | |
485 | debugs(22, 3, HERE << "YES because HTTP status " << rep->sline.status() << " and Expires > Date"); | |
486 | return 1; | |
487 | } else { | |
488 | debugs(22, 3, HERE << "NO because HTTP status " << rep->sline.status() << " and Expires <= Date"); | |
489 | return 0; | |
490 | } | |
491 | /* NOTREACHED */ | |
492 | break; | |
493 | ||
494 | /* Errors can be negatively cached */ | |
495 | ||
496 | case Http::scNoContent: | |
497 | ||
498 | case Http::scUseProxy: | |
499 | ||
500 | case Http::scBadRequest: | |
501 | ||
502 | case Http::scForbidden: | |
503 | ||
504 | case Http::scNotFound: | |
505 | ||
506 | case Http::scMethodNotAllowed: | |
507 | ||
508 | case Http::scUriTooLong: | |
509 | ||
510 | case Http::scInternalServerError: | |
511 | ||
512 | case Http::scNotImplemented: | |
513 | ||
514 | case Http::scBadGateway: | |
515 | ||
516 | case Http::scServiceUnavailable: | |
517 | ||
518 | case Http::scGatewayTimeout: | |
519 | case Http::scMisdirectedRequest: | |
520 | ||
521 | debugs(22, 3, "MAYBE because HTTP status " << rep->sline.status()); | |
522 | return -1; | |
523 | ||
524 | /* NOTREACHED */ | |
525 | break; | |
526 | ||
527 | /* Some responses can never be cached */ | |
528 | ||
529 | case Http::scPartialContent: /* Not yet supported */ | |
530 | ||
531 | case Http::scSeeOther: | |
532 | ||
533 | case Http::scNotModified: | |
534 | ||
535 | case Http::scUnauthorized: | |
536 | ||
537 | case Http::scProxyAuthenticationRequired: | |
538 | ||
539 | case Http::scInvalidHeader: /* Squid header parsing error */ | |
540 | ||
541 | case Http::scHeaderTooLarge: | |
542 | ||
543 | case Http::scPaymentRequired: | |
544 | case Http::scNotAcceptable: | |
545 | case Http::scRequestTimeout: | |
546 | case Http::scConflict: | |
547 | case Http::scLengthRequired: | |
548 | case Http::scPreconditionFailed: | |
549 | case Http::scPayloadTooLarge: | |
550 | case Http::scUnsupportedMediaType: | |
551 | case Http::scUnprocessableEntity: | |
552 | case Http::scLocked: | |
553 | case Http::scFailedDependency: | |
554 | case Http::scInsufficientStorage: | |
555 | case Http::scRequestedRangeNotSatisfied: | |
556 | case Http::scExpectationFailed: | |
557 | ||
558 | debugs(22, 3, HERE << "NO because HTTP status " << rep->sline.status()); | |
559 | return 0; | |
560 | ||
561 | default: | |
562 | /* RFC 2616 section 6.1.1: an unrecognized response MUST NOT be cached. */ | |
563 | debugs (11, 3, HERE << "NO because unknown HTTP status code " << rep->sline.status()); | |
564 | return 0; | |
565 | ||
566 | /* NOTREACHED */ | |
567 | break; | |
568 | } | |
569 | ||
570 | /* NOTREACHED */ | |
571 | } | |
572 | ||
573 | /* | |
574 | * For Vary, store the relevant request headers as | |
575 | * virtual headers in the reply | |
576 | * Returns false if the variance cannot be stored | |
577 | */ | |
578 | const char * | |
579 | httpMakeVaryMark(HttpRequest * request, HttpReply const * reply) | |
580 | { | |
581 | String vary, hdr; | |
582 | const char *pos = NULL; | |
583 | const char *item; | |
584 | const char *value; | |
585 | int ilen; | |
586 | static String vstr; | |
587 | ||
588 | vstr.clean(); | |
589 | vary = reply->header.getList(Http::HdrType::VARY); | |
590 | ||
591 | while (strListGetItem(&vary, ',', &item, &ilen, &pos)) { | |
592 | static const SBuf asterisk("*"); | |
593 | SBuf name(item, ilen); | |
594 | if (name == asterisk) { | |
595 | vstr.clean(); | |
596 | break; | |
597 | } | |
598 | name.toLower(); | |
599 | strListAdd(&vstr, name.c_str(), ','); | |
600 | hdr = request->header.getByName(name); | |
601 | value = hdr.termedBuf(); | |
602 | if (value) { | |
603 | value = rfc1738_escape_part(value); | |
604 | vstr.append("=\"", 2); | |
605 | vstr.append(value); | |
606 | vstr.append("\"", 1); | |
607 | } | |
608 | ||
609 | hdr.clean(); | |
610 | } | |
611 | ||
612 | vary.clean(); | |
613 | #if X_ACCELERATOR_VARY | |
614 | ||
615 | pos = NULL; | |
616 | vary = reply->header.getList(Http::HdrType::HDR_X_ACCELERATOR_VARY); | |
617 | ||
618 | while (strListGetItem(&vary, ',', &item, &ilen, &pos)) { | |
619 | char *name = (char *)xmalloc(ilen + 1); | |
620 | xstrncpy(name, item, ilen + 1); | |
621 | Tolower(name); | |
622 | strListAdd(&vstr, name, ','); | |
623 | hdr = request->header.getByName(name); | |
624 | safe_free(name); | |
625 | value = hdr.termedBuf(); | |
626 | ||
627 | if (value) { | |
628 | value = rfc1738_escape_part(value); | |
629 | vstr.append("=\"", 2); | |
630 | vstr.append(value); | |
631 | vstr.append("\"", 1); | |
632 | } | |
633 | ||
634 | hdr.clean(); | |
635 | } | |
636 | ||
637 | vary.clean(); | |
638 | #endif | |
639 | ||
640 | debugs(11, 3, "httpMakeVaryMark: " << vstr); | |
641 | return vstr.termedBuf(); | |
642 | } | |
643 | ||
644 | void | |
645 | HttpStateData::keepaliveAccounting(HttpReply *reply) | |
646 | { | |
647 | if (flags.keepalive) | |
648 | if (_peer) | |
649 | ++ _peer->stats.n_keepalives_sent; | |
650 | ||
651 | if (reply->keep_alive) { | |
652 | if (_peer) | |
653 | ++ _peer->stats.n_keepalives_recv; | |
654 | ||
655 | if (Config.onoff.detect_broken_server_pconns | |
656 | && reply->bodySize(request->method) == -1 && !flags.chunked) { | |
657 | debugs(11, DBG_IMPORTANT, "keepaliveAccounting: Impossible keep-alive header from '" << entry->url() << "'" ); | |
658 | // debugs(11, 2, "GOT HTTP REPLY HDR:\n---------\n" << readBuf->content() << "\n----------" ); | |
659 | flags.keepalive_broken = true; | |
660 | } | |
661 | } | |
662 | } | |
663 | ||
664 | void | |
665 | HttpStateData::checkDateSkew(HttpReply *reply) | |
666 | { | |
667 | if (reply->date > -1 && !_peer) { | |
668 | int skew = abs((int)(reply->date - squid_curtime)); | |
669 | ||
670 | if (skew > 86400) | |
671 | debugs(11, 3, "" << request->url.host() << "'s clock is skewed by " << skew << " seconds!"); | |
672 | } | |
673 | } | |
674 | ||
675 | /** | |
676 | * This creates the error page itself.. its likely | |
677 | * that the forward ported reply header max size patch | |
678 | * generates non http conformant error pages - in which | |
679 | * case the errors where should be 'BAD_GATEWAY' etc | |
680 | */ | |
681 | void | |
682 | HttpStateData::processReplyHeader() | |
683 | { | |
684 | /** Creates a blank header. If this routine is made incremental, this will not do */ | |
685 | ||
686 | /* NP: all exit points to this function MUST call ctx_exit(ctx) */ | |
687 | Ctx ctx = ctx_enter(entry->mem_obj->urlXXX()); | |
688 | ||
689 | debugs(11, 3, "processReplyHeader: key '" << entry->getMD5Text() << "'"); | |
690 | ||
691 | assert(!flags.headers_parsed); | |
692 | ||
693 | if (!inBuf.length()) { | |
694 | ctx_exit(ctx); | |
695 | return; | |
696 | } | |
697 | ||
698 | /* Attempt to parse the first line; this will define where the protocol, status, reason-phrase and header begin */ | |
699 | { | |
700 | if (hp == NULL) | |
701 | hp = new Http1::ResponseParser; | |
702 | ||
703 | bool parsedOk = hp->parse(inBuf); | |
704 | ||
705 | // sync the buffers after parsing. | |
706 | inBuf = hp->remaining(); | |
707 | ||
708 | if (hp->needsMoreData()) { | |
709 | if (eof) { // no more data coming | |
710 | /* Bug 2879: Replies may terminate with \r\n then EOF instead of \r\n\r\n. | |
711 | * We also may receive truncated responses. | |
712 | * Ensure here that we have at minimum two \r\n when EOF is seen. | |
713 | */ | |
714 | inBuf.append("\r\n\r\n", 4); | |
715 | // retry the parse | |
716 | parsedOk = hp->parse(inBuf); | |
717 | // sync the buffers after parsing. | |
718 | inBuf = hp->remaining(); | |
719 | } else { | |
720 | debugs(33, 5, "Incomplete response, waiting for end of response headers"); | |
721 | ctx_exit(ctx); | |
722 | return; | |
723 | } | |
724 | } | |
725 | ||
726 | if (!parsedOk) { | |
727 | // unrecoverable parsing error | |
728 | debugs(11, 3, "Non-HTTP-compliant header:\n---------\n" << inBuf << "\n----------"); | |
729 | flags.headers_parsed = true; | |
730 | HttpReply *newrep = new HttpReply; | |
731 | newrep->sline.set(Http::ProtocolVersion(), hp->messageStatus()); | |
732 | HttpReply *vrep = setVirginReply(newrep); | |
733 | entry->replaceHttpReply(vrep); | |
734 | // XXX: close the server connection ? | |
735 | ctx_exit(ctx); | |
736 | return; | |
737 | } | |
738 | } | |
739 | ||
740 | /* We know the whole response is in parser now */ | |
741 | debugs(11, 2, "HTTP Server " << serverConnection); | |
742 | debugs(11, 2, "HTTP Server RESPONSE:\n---------\n" << | |
743 | hp->messageProtocol() << " " << hp->messageStatus() << " " << hp->reasonPhrase() << "\n" << | |
744 | hp->mimeHeader() << | |
745 | "----------"); | |
746 | ||
747 | // reset payload tracking to begin after message headers | |
748 | payloadSeen = inBuf.length(); | |
749 | ||
750 | HttpReply *newrep = new HttpReply; | |
751 | // XXX: RFC 7230 indicates we MAY ignore the reason phrase, | |
752 | // and use an empty string on unknown status. | |
753 | // We do that now to avoid performance regression from using SBuf::c_str() | |
754 | newrep->sline.set(Http::ProtocolVersion(1,1), hp->messageStatus() /* , hp->reasonPhrase() */); | |
755 | newrep->sline.protocol = newrep->sline.version.protocol = hp->messageProtocol().protocol; | |
756 | newrep->sline.version.major = hp->messageProtocol().major; | |
757 | newrep->sline.version.minor = hp->messageProtocol().minor; | |
758 | ||
759 | // parse headers | |
760 | if (!newrep->parseHeader(*hp)) { | |
761 | // XXX: when Http::ProtocolVersion is a function, remove this hack. just set with messageProtocol() | |
762 | newrep->sline.set(Http::ProtocolVersion(), Http::scInvalidHeader); | |
763 | newrep->sline.version.protocol = hp->messageProtocol().protocol; | |
764 | newrep->sline.version.major = hp->messageProtocol().major; | |
765 | newrep->sline.version.minor = hp->messageProtocol().minor; | |
766 | debugs(11, 2, "error parsing response headers mime block"); | |
767 | } | |
768 | ||
769 | // done with Parser, now process using the HttpReply | |
770 | hp = NULL; | |
771 | ||
772 | newrep->removeStaleWarnings(); | |
773 | ||
774 | if (newrep->sline.protocol == AnyP::PROTO_HTTP && newrep->sline.status() >= 100 && newrep->sline.status() < 200) { | |
775 | handle1xx(newrep); | |
776 | ctx_exit(ctx); | |
777 | return; | |
778 | } | |
779 | ||
780 | flags.chunked = false; | |
781 | if (newrep->sline.protocol == AnyP::PROTO_HTTP && newrep->header.chunked()) { | |
782 | flags.chunked = true; | |
783 | httpChunkDecoder = new Http1::TeChunkedParser; | |
784 | } | |
785 | ||
786 | if (!peerSupportsConnectionPinning()) | |
787 | request->flags.connectionAuthDisabled = true; | |
788 | ||
789 | HttpReply *vrep = setVirginReply(newrep); | |
790 | flags.headers_parsed = true; | |
791 | ||
792 | keepaliveAccounting(vrep); | |
793 | ||
794 | checkDateSkew(vrep); | |
795 | ||
796 | processSurrogateControl (vrep); | |
797 | ||
798 | request->hier.peer_reply_status = newrep->sline.status(); | |
799 | ||
800 | ctx_exit(ctx); | |
801 | } | |
802 | ||
803 | /// ignore or start forwarding the 1xx response (a.k.a., control message) | |
804 | void | |
805 | HttpStateData::handle1xx(HttpReply *reply) | |
806 | { | |
807 | HttpReply::Pointer msg(reply); // will destroy reply if unused | |
808 | ||
809 | // one 1xx at a time: we must not be called while waiting for previous 1xx | |
810 | Must(!flags.handling1xx); | |
811 | flags.handling1xx = true; | |
812 | ||
813 | if (!request->canHandle1xx() || request->forcedBodyContinuation) { | |
814 | debugs(11, 2, "ignoring 1xx because it is " << (request->forcedBodyContinuation ? "already sent" : "not supported by client")); | |
815 | proceedAfter1xx(); | |
816 | return; | |
817 | } | |
818 | ||
819 | #if USE_HTTP_VIOLATIONS | |
820 | // check whether the 1xx response forwarding is allowed by squid.conf | |
821 | if (Config.accessList.reply) { | |
822 | ACLFilledChecklist ch(Config.accessList.reply, originalRequest(), NULL); | |
823 | ch.reply = reply; | |
824 | HTTPMSGLOCK(ch.reply); | |
825 | if (ch.fastCheck() != ACCESS_ALLOWED) { // TODO: support slow lookups? | |
826 | debugs(11, 3, HERE << "ignoring denied 1xx"); | |
827 | proceedAfter1xx(); | |
828 | return; | |
829 | } | |
830 | } | |
831 | #endif // USE_HTTP_VIOLATIONS | |
832 | ||
833 | debugs(11, 2, HERE << "forwarding 1xx to client"); | |
834 | ||
835 | // the Sink will use this to call us back after writing 1xx to the client | |
836 | typedef NullaryMemFunT<HttpStateData> CbDialer; | |
837 | const AsyncCall::Pointer cb = JobCallback(11, 3, CbDialer, this, | |
838 | HttpStateData::proceedAfter1xx); | |
839 | CallJobHere1(11, 4, request->clientConnectionManager, ConnStateData, | |
840 | ConnStateData::sendControlMsg, HttpControlMsg(msg, cb)); | |
841 | // If the call is not fired, then the Sink is gone, and HttpStateData | |
842 | // will terminate due to an aborted store entry or another similar error. | |
843 | // If we get stuck, it is not handle1xx fault if we could get stuck | |
844 | // for similar reasons without a 1xx response. | |
845 | } | |
846 | ||
847 | /// restores state and resumes processing after 1xx is ignored or forwarded | |
848 | void | |
849 | HttpStateData::proceedAfter1xx() | |
850 | { | |
851 | Must(flags.handling1xx); | |
852 | debugs(11, 2, "continuing with " << payloadSeen << " bytes in buffer after 1xx"); | |
853 | CallJobHere(11, 3, this, HttpStateData, HttpStateData::processReply); | |
854 | } | |
855 | ||
856 | /** | |
857 | * returns true if the peer can support connection pinning | |
858 | */ | |
859 | bool HttpStateData::peerSupportsConnectionPinning() const | |
860 | { | |
861 | const HttpReply *rep = entry->mem_obj->getReply(); | |
862 | const HttpHeader *hdr = &rep->header; | |
863 | bool rc; | |
864 | String header; | |
865 | ||
866 | if (!_peer) | |
867 | return true; | |
868 | ||
869 | /*If this peer does not support connection pinning (authenticated | |
870 | connections) return false | |
871 | */ | |
872 | if (!_peer->connection_auth) | |
873 | return false; | |
874 | ||
875 | /*The peer supports connection pinning and the http reply status | |
876 | is not unauthorized, so the related connection can be pinned | |
877 | */ | |
878 | if (rep->sline.status() != Http::scUnauthorized) | |
879 | return true; | |
880 | ||
881 | /*The server respond with Http::scUnauthorized and the peer configured | |
882 | with "connection-auth=on" we know that the peer supports pinned | |
883 | connections | |
884 | */ | |
885 | if (_peer->connection_auth == 1) | |
886 | return true; | |
887 | ||
888 | /*At this point peer has configured with "connection-auth=auto" | |
889 | parameter so we need some extra checks to decide if we are going | |
890 | to allow pinned connections or not | |
891 | */ | |
892 | ||
893 | /*if the peer configured with originserver just allow connection | |
894 | pinning (squid 2.6 behaviour) | |
895 | */ | |
896 | if (_peer->options.originserver) | |
897 | return true; | |
898 | ||
899 | /*if the connections it is already pinned it is OK*/ | |
900 | if (request->flags.pinned) | |
901 | return true; | |
902 | ||
903 | /*Allow pinned connections only if the Proxy-support header exists in | |
904 | reply and has in its list the "Session-Based-Authentication" | |
905 | which means that the peer supports connection pinning. | |
906 | */ | |
907 | if (!hdr->has(Http::HdrType::PROXY_SUPPORT)) | |
908 | return false; | |
909 | ||
910 | header = hdr->getStrOrList(Http::HdrType::PROXY_SUPPORT); | |
911 | /* XXX This ought to be done in a case-insensitive manner */ | |
912 | rc = (strstr(header.termedBuf(), "Session-Based-Authentication") != NULL); | |
913 | ||
914 | return rc; | |
915 | } | |
916 | ||
917 | // Called when we parsed (and possibly adapted) the headers but | |
918 | // had not starting storing (a.k.a., sending) the body yet. | |
919 | void | |
920 | HttpStateData::haveParsedReplyHeaders() | |
921 | { | |
922 | Client::haveParsedReplyHeaders(); | |
923 | ||
924 | Ctx ctx = ctx_enter(entry->mem_obj->urlXXX()); | |
925 | HttpReply *rep = finalReply(); | |
926 | ||
927 | entry->timestampsSet(); | |
928 | ||
929 | /* Check if object is cacheable or not based on reply code */ | |
930 | debugs(11, 3, "HTTP CODE: " << rep->sline.status()); | |
931 | ||
932 | if (neighbors_do_private_keys) | |
933 | httpMaybeRemovePublic(entry, rep->sline.status()); | |
934 | ||
935 | bool varyFailure = false; | |
936 | if (rep->header.has(Http::HdrType::VARY) | |
937 | #if X_ACCELERATOR_VARY | |
938 | || rep->header.has(Http::HdrType::HDR_X_ACCELERATOR_VARY) | |
939 | #endif | |
940 | ) { | |
941 | const char *vary = httpMakeVaryMark(request, rep); | |
942 | ||
943 | if (!vary) { | |
944 | entry->makePrivate(); | |
945 | if (!fwd->reforwardableStatus(rep->sline.status())) | |
946 | EBIT_CLR(entry->flags, ENTRY_FWD_HDR_WAIT); | |
947 | varyFailure = true; | |
948 | } else { | |
949 | entry->mem_obj->vary_headers = xstrdup(vary); | |
950 | } | |
951 | } | |
952 | ||
953 | if (!varyFailure) { | |
954 | /* | |
955 | * If its not a reply that we will re-forward, then | |
956 | * allow the client to get it. | |
957 | */ | |
958 | if (!fwd->reforwardableStatus(rep->sline.status())) | |
959 | EBIT_CLR(entry->flags, ENTRY_FWD_HDR_WAIT); | |
960 | ||
961 | switch (cacheableReply()) { | |
962 | ||
963 | case 1: | |
964 | entry->makePublic(); | |
965 | break; | |
966 | ||
967 | case 0: | |
968 | entry->makePrivate(); | |
969 | break; | |
970 | ||
971 | case -1: | |
972 | ||
973 | #if USE_HTTP_VIOLATIONS | |
974 | if (Config.negativeTtl > 0) | |
975 | entry->cacheNegatively(); | |
976 | else | |
977 | #endif | |
978 | entry->makePrivate(); | |
979 | break; | |
980 | ||
981 | default: | |
982 | assert(0); | |
983 | break; | |
984 | } | |
985 | } | |
986 | ||
987 | if (!ignoreCacheControl) { | |
988 | if (rep->cache_control) { | |
989 | // We are required to revalidate on many conditions. | |
990 | // For security reasons we do so even if storage was caused by refresh_pattern ignore-* option | |
991 | ||
992 | // CC:must-revalidate or CC:proxy-revalidate | |
993 | const bool ccMustRevalidate = (rep->cache_control->proxyRevalidate() || rep->cache_control->mustRevalidate()); | |
994 | ||
995 | // CC:no-cache (only if there are no parameters) | |
996 | const bool ccNoCacheNoParams = (rep->cache_control->hasNoCache() && rep->cache_control->noCache().size()==0); | |
997 | ||
998 | // CC:s-maxage=N | |
999 | const bool ccSMaxAge = rep->cache_control->hasSMaxAge(); | |
1000 | ||
1001 | // CC:private (yes, these can sometimes be stored) | |
1002 | const bool ccPrivate = rep->cache_control->hasPrivate(); | |
1003 | ||
1004 | if (ccMustRevalidate || ccNoCacheNoParams || ccSMaxAge || ccPrivate) | |
1005 | EBIT_SET(entry->flags, ENTRY_REVALIDATE); | |
1006 | } | |
1007 | #if USE_HTTP_VIOLATIONS // response header Pragma::no-cache is undefined in HTTP | |
1008 | else { | |
1009 | // Expensive calculation. So only do it IF the CC: header is not present. | |
1010 | ||
1011 | /* HACK: Pragma: no-cache in _replies_ is not documented in HTTP, | |
1012 | * but servers like "Active Imaging Webcast/2.0" sure do use it */ | |
1013 | if (rep->header.has(Http::HdrType::PRAGMA) && | |
1014 | rep->header.hasListMember(Http::HdrType::PRAGMA,"no-cache",',')) | |
1015 | EBIT_SET(entry->flags, ENTRY_REVALIDATE); | |
1016 | } | |
1017 | #endif | |
1018 | } | |
1019 | ||
1020 | #if HEADERS_LOG | |
1021 | headersLog(1, 0, request->method, rep); | |
1022 | ||
1023 | #endif | |
1024 | ||
1025 | ctx_exit(ctx); | |
1026 | } | |
1027 | ||
1028 | HttpStateData::ConnectionStatus | |
1029 | HttpStateData::statusIfComplete() const | |
1030 | { | |
1031 | const HttpReply *rep = virginReply(); | |
1032 | /** \par | |
1033 | * If the reply wants to close the connection, it takes precedence */ | |
1034 | ||
1035 | if (httpHeaderHasConnDir(&rep->header, "close")) | |
1036 | return COMPLETE_NONPERSISTENT_MSG; | |
1037 | ||
1038 | /** \par | |
1039 | * If we didn't send a keep-alive request header, then this | |
1040 | * can not be a persistent connection. | |
1041 | */ | |
1042 | if (!flags.keepalive) | |
1043 | return COMPLETE_NONPERSISTENT_MSG; | |
1044 | ||
1045 | /** \par | |
1046 | * If we haven't sent the whole request then this can not be a persistent | |
1047 | * connection. | |
1048 | */ | |
1049 | if (!flags.request_sent) { | |
1050 | debugs(11, 2, "Request not yet fully sent " << request->method << ' ' << entry->url()); | |
1051 | return COMPLETE_NONPERSISTENT_MSG; | |
1052 | } | |
1053 | ||
1054 | /** \par | |
1055 | * What does the reply have to say about keep-alive? | |
1056 | */ | |
1057 | /** | |
1058 | \bug XXX BUG? | |
1059 | * If the origin server (HTTP/1.0) does not send a keep-alive | |
1060 | * header, but keeps the connection open anyway, what happens? | |
1061 | * We'll return here and http.c waits for an EOF before changing | |
1062 | * store_status to STORE_OK. Combine this with ENTRY_FWD_HDR_WAIT | |
1063 | * and an error status code, and we might have to wait until | |
1064 | * the server times out the socket. | |
1065 | */ | |
1066 | if (!rep->keep_alive) | |
1067 | return COMPLETE_NONPERSISTENT_MSG; | |
1068 | ||
1069 | return COMPLETE_PERSISTENT_MSG; | |
1070 | } | |
1071 | ||
1072 | HttpStateData::ConnectionStatus | |
1073 | HttpStateData::persistentConnStatus() const | |
1074 | { | |
1075 | debugs(11, 3, HERE << serverConnection << " eof=" << eof); | |
1076 | if (eof) // already reached EOF | |
1077 | return COMPLETE_NONPERSISTENT_MSG; | |
1078 | ||
1079 | /* If server fd is closing (but we have not been notified yet), stop Comm | |
1080 | I/O to avoid assertions. TODO: Change Comm API to handle callers that | |
1081 | want more I/O after async closing (usually initiated by others). */ | |
1082 | // XXX: add canReceive or s/canSend/canTalkToServer/ | |
1083 | if (!Comm::IsConnOpen(serverConnection)) | |
1084 | return COMPLETE_NONPERSISTENT_MSG; | |
1085 | ||
1086 | /** \par | |
1087 | * In chunked response we do not know the content length but we are absolutely | |
1088 | * sure about the end of response, so we are calling the statusIfComplete to | |
1089 | * decide if we can be persistant | |
1090 | */ | |
1091 | if (lastChunk && flags.chunked) | |
1092 | return statusIfComplete(); | |
1093 | ||
1094 | const HttpReply *vrep = virginReply(); | |
1095 | debugs(11, 5, "persistentConnStatus: content_length=" << vrep->content_length); | |
1096 | ||
1097 | const int64_t clen = vrep->bodySize(request->method); | |
1098 | ||
1099 | debugs(11, 5, "persistentConnStatus: clen=" << clen); | |
1100 | ||
1101 | /* If the body size is unknown we must wait for EOF */ | |
1102 | if (clen < 0) | |
1103 | return INCOMPLETE_MSG; | |
1104 | ||
1105 | /** \par | |
1106 | * If the body size is known, we must wait until we've gotten all of it. */ | |
1107 | if (clen > 0) { | |
1108 | debugs(11,5, "payloadSeen=" << payloadSeen << " content_length=" << vrep->content_length); | |
1109 | ||
1110 | if (payloadSeen < vrep->content_length) | |
1111 | return INCOMPLETE_MSG; | |
1112 | ||
1113 | if (payloadTruncated > 0) // already read more than needed | |
1114 | return COMPLETE_NONPERSISTENT_MSG; // disable pconns | |
1115 | } | |
1116 | ||
1117 | /** \par | |
1118 | * If there is no message body or we got it all, we can be persistent */ | |
1119 | return statusIfComplete(); | |
1120 | } | |
1121 | ||
1122 | #if USE_DELAY_POOLS | |
1123 | static void | |
1124 | readDelayed(void *context, CommRead const &) | |
1125 | { | |
1126 | HttpStateData *state = static_cast<HttpStateData*>(context); | |
1127 | state->flags.do_next_read = true; | |
1128 | state->maybeReadVirginBody(); | |
1129 | } | |
1130 | #endif | |
1131 | ||
1132 | void | |
1133 | HttpStateData::readReply(const CommIoCbParams &io) | |
1134 | { | |
1135 | Must(!flags.do_next_read); // XXX: should have been set false by mayReadVirginBody() | |
1136 | flags.do_next_read = false; | |
1137 | ||
1138 | debugs(11, 5, io.conn); | |
1139 | ||
1140 | // Bail out early on Comm::ERR_CLOSING - close handlers will tidy up for us | |
1141 | if (io.flag == Comm::ERR_CLOSING) { | |
1142 | debugs(11, 3, "http socket closing"); | |
1143 | return; | |
1144 | } | |
1145 | ||
1146 | if (EBIT_TEST(entry->flags, ENTRY_ABORTED)) { | |
1147 | abortTransaction("store entry aborted while reading reply"); | |
1148 | return; | |
1149 | } | |
1150 | ||
1151 | Must(Comm::IsConnOpen(serverConnection)); | |
1152 | Must(io.conn->fd == serverConnection->fd); | |
1153 | ||
1154 | /* | |
1155 | * Don't reset the timeout value here. The value should be | |
1156 | * counting Config.Timeout.request and applies to the request | |
1157 | * as a whole, not individual read() calls. | |
1158 | * Plus, it breaks our lame *HalfClosed() detection | |
1159 | */ | |
1160 | ||
1161 | Must(maybeMakeSpaceAvailable(true)); | |
1162 | CommIoCbParams rd(this); // will be expanded with ReadNow results | |
1163 | rd.conn = io.conn; | |
1164 | rd.size = entry->bytesWanted(Range<size_t>(0, inBuf.spaceSize())); | |
1165 | #if USE_DELAY_POOLS | |
1166 | if (rd.size < 1) { | |
1167 | assert(entry->mem_obj); | |
1168 | ||
1169 | /* read ahead limit */ | |
1170 | /* Perhaps these two calls should both live in MemObject */ | |
1171 | AsyncCall::Pointer nilCall; | |
1172 | if (!entry->mem_obj->readAheadPolicyCanRead()) { | |
1173 | entry->mem_obj->delayRead(DeferredRead(readDelayed, this, CommRead(io.conn, NULL, 0, nilCall))); | |
1174 | return; | |
1175 | } | |
1176 | ||
1177 | /* delay id limit */ | |
1178 | entry->mem_obj->mostBytesAllowed().delayRead(DeferredRead(readDelayed, this, CommRead(io.conn, NULL, 0, nilCall))); | |
1179 | return; | |
1180 | } | |
1181 | #endif | |
1182 | ||
1183 | switch (Comm::ReadNow(rd, inBuf)) { | |
1184 | case Comm::INPROGRESS: | |
1185 | if (inBuf.isEmpty()) | |
1186 | debugs(33, 2, io.conn << ": no data to process, " << xstrerr(rd.xerrno)); | |
1187 | flags.do_next_read = true; | |
1188 | maybeReadVirginBody(); | |
1189 | return; | |
1190 | ||
1191 | case Comm::OK: | |
1192 | { | |
1193 | payloadSeen += rd.size; | |
1194 | #if USE_DELAY_POOLS | |
1195 | DelayId delayId = entry->mem_obj->mostBytesAllowed(); | |
1196 | delayId.bytesIn(rd.size); | |
1197 | #endif | |
1198 | ||
1199 | statCounter.server.all.kbytes_in += rd.size; | |
1200 | statCounter.server.http.kbytes_in += rd.size; | |
1201 | ++ IOStats.Http.reads; | |
1202 | ||
1203 | int bin = 0; | |
1204 | for (int clen = rd.size - 1; clen; ++bin) | |
1205 | clen >>= 1; | |
1206 | ||
1207 | ++ IOStats.Http.read_hist[bin]; | |
1208 | ||
1209 | // update peer response time stats (%<pt) | |
1210 | const timeval &sent = request->hier.peer_http_request_sent; | |
1211 | if (sent.tv_sec) | |
1212 | tvSub(request->hier.peer_response_time, sent, current_time); | |
1213 | else | |
1214 | request->hier.peer_response_time.tv_sec = -1; | |
1215 | } | |
1216 | ||
1217 | /* Continue to process previously read data */ | |
1218 | break; | |
1219 | ||
1220 | case Comm::ENDFILE: // close detected by 0-byte read | |
1221 | eof = 1; | |
1222 | flags.do_next_read = false; | |
1223 | ||
1224 | /* Continue to process previously read data */ | |
1225 | break; | |
1226 | ||
1227 | // case Comm::COMM_ERROR: | |
1228 | default: // no other flags should ever occur | |
1229 | debugs(11, 2, io.conn << ": read failure: " << xstrerr(rd.xerrno)); | |
1230 | ErrorState *err = new ErrorState(ERR_READ_ERROR, Http::scBadGateway, fwd->request); | |
1231 | err->xerrno = rd.xerrno; | |
1232 | fwd->fail(err); | |
1233 | flags.do_next_read = false; | |
1234 | io.conn->close(); | |
1235 | ||
1236 | return; | |
1237 | } | |
1238 | ||
1239 | /* Process next response from buffer */ | |
1240 | processReply(); | |
1241 | } | |
1242 | ||
1243 | /// processes the already read and buffered response data, possibly after | |
1244 | /// waiting for asynchronous 1xx control message processing | |
1245 | void | |
1246 | HttpStateData::processReply() | |
1247 | { | |
1248 | ||
1249 | if (flags.handling1xx) { // we came back after handling a 1xx response | |
1250 | debugs(11, 5, HERE << "done with 1xx handling"); | |
1251 | flags.handling1xx = false; | |
1252 | Must(!flags.headers_parsed); | |
1253 | } | |
1254 | ||
1255 | if (!flags.headers_parsed) { // have not parsed headers yet? | |
1256 | PROF_start(HttpStateData_processReplyHeader); | |
1257 | processReplyHeader(); | |
1258 | PROF_stop(HttpStateData_processReplyHeader); | |
1259 | ||
1260 | if (!continueAfterParsingHeader()) // parsing error or need more data | |
1261 | return; // TODO: send errors to ICAP | |
1262 | ||
1263 | adaptOrFinalizeReply(); // may write to, abort, or "close" the entry | |
1264 | } | |
1265 | ||
1266 | // kick more reads if needed and/or process the response body, if any | |
1267 | PROF_start(HttpStateData_processReplyBody); | |
1268 | processReplyBody(); // may call serverComplete() | |
1269 | PROF_stop(HttpStateData_processReplyBody); | |
1270 | } | |
1271 | ||
1272 | /** | |
1273 | \retval true if we can continue with processing the body or doing ICAP. | |
1274 | */ | |
1275 | bool | |
1276 | HttpStateData::continueAfterParsingHeader() | |
1277 | { | |
1278 | if (flags.handling1xx) { | |
1279 | debugs(11, 5, HERE << "wait for 1xx handling"); | |
1280 | Must(!flags.headers_parsed); | |
1281 | return false; | |
1282 | } | |
1283 | ||
1284 | if (!flags.headers_parsed && !eof) { | |
1285 | debugs(11, 9, "needs more at " << inBuf.length()); | |
1286 | flags.do_next_read = true; | |
1287 | /** \retval false If we have not finished parsing the headers and may get more data. | |
1288 | * Schedules more reads to retrieve the missing data. | |
1289 | */ | |
1290 | maybeReadVirginBody(); // schedules all kinds of reads; TODO: rename | |
1291 | return false; | |
1292 | } | |
1293 | ||
1294 | /** If we are done with parsing, check for errors */ | |
1295 | ||
1296 | err_type error = ERR_NONE; | |
1297 | ||
1298 | if (flags.headers_parsed) { // parsed headers, possibly with errors | |
1299 | // check for header parsing errors | |
1300 | if (HttpReply *vrep = virginReply()) { | |
1301 | const Http::StatusCode s = vrep->sline.status(); | |
1302 | const AnyP::ProtocolVersion &v = vrep->sline.version; | |
1303 | if (s == Http::scInvalidHeader && v != Http::ProtocolVersion(0,9)) { | |
1304 | debugs(11, DBG_IMPORTANT, "WARNING: HTTP: Invalid Response: Bad header encountered from " << entry->url() << " AKA " << request->url); | |
1305 | error = ERR_INVALID_RESP; | |
1306 | } else if (s == Http::scHeaderTooLarge) { | |
1307 | fwd->dontRetry(true); | |
1308 | error = ERR_TOO_BIG; | |
1309 | } else if (vrep->header.conflictingContentLength()) { | |
1310 | fwd->dontRetry(true); | |
1311 | error = ERR_INVALID_RESP; | |
1312 | } else { | |
1313 | return true; // done parsing, got reply, and no error | |
1314 | } | |
1315 | } else { | |
1316 | // parsed headers but got no reply | |
1317 | debugs(11, DBG_IMPORTANT, "WARNING: HTTP: Invalid Response: No reply at all for " << entry->url() << " AKA " << request->url); | |
1318 | error = ERR_INVALID_RESP; | |
1319 | } | |
1320 | } else { | |
1321 | assert(eof); | |
1322 | if (inBuf.length()) { | |
1323 | error = ERR_INVALID_RESP; | |
1324 | debugs(11, DBG_IMPORTANT, "WARNING: HTTP: Invalid Response: Headers did not parse at all for " << entry->url() << " AKA " << request->url); | |
1325 | } else { | |
1326 | error = ERR_ZERO_SIZE_OBJECT; | |
1327 | debugs(11, (request->flags.accelerated?DBG_IMPORTANT:2), "WARNING: HTTP: Invalid Response: No object data received for " << entry->url() << " AKA " << request->url); | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | assert(error != ERR_NONE); | |
1332 | entry->reset(); | |
1333 | fwd->fail(new ErrorState(error, Http::scBadGateway, fwd->request)); | |
1334 | flags.do_next_read = false; | |
1335 | serverConnection->close(); | |
1336 | return false; // quit on error | |
1337 | } | |
1338 | ||
1339 | /** truncate what we read if we read too much so that writeReplyBody() | |
1340 | writes no more than what we should have read */ | |
1341 | void | |
1342 | HttpStateData::truncateVirginBody() | |
1343 | { | |
1344 | assert(flags.headers_parsed); | |
1345 | ||
1346 | HttpReply *vrep = virginReply(); | |
1347 | int64_t clen = -1; | |
1348 | if (!vrep->expectingBody(request->method, clen) || clen < 0) | |
1349 | return; // no body or a body of unknown size, including chunked | |
1350 | ||
1351 | if (payloadSeen - payloadTruncated <= clen) | |
1352 | return; // we did not read too much or already took care of the extras | |
1353 | ||
1354 | if (const int64_t extras = payloadSeen - payloadTruncated - clen) { | |
1355 | // server sent more that the advertised content length | |
1356 | debugs(11, 5, "payloadSeen=" << payloadSeen << | |
1357 | " clen=" << clen << '/' << vrep->content_length << | |
1358 | " trucated=" << payloadTruncated << '+' << extras); | |
1359 | ||
1360 | inBuf.chop(0, inBuf.length() - extras); | |
1361 | payloadTruncated += extras; | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | /** | |
1366 | * Call this when there is data from the origin server | |
1367 | * which should be sent to either StoreEntry, or to ICAP... | |
1368 | */ | |
1369 | void | |
1370 | HttpStateData::writeReplyBody() | |
1371 | { | |
1372 | truncateVirginBody(); // if needed | |
1373 | const char *data = inBuf.rawContent(); | |
1374 | int len = inBuf.length(); | |
1375 | addVirginReplyBody(data, len); | |
1376 | inBuf.consume(len); | |
1377 | } | |
1378 | ||
1379 | bool | |
1380 | HttpStateData::decodeAndWriteReplyBody() | |
1381 | { | |
1382 | const char *data = NULL; | |
1383 | int len; | |
1384 | bool wasThereAnException = false; | |
1385 | assert(flags.chunked); | |
1386 | assert(httpChunkDecoder); | |
1387 | SQUID_ENTER_THROWING_CODE(); | |
1388 | MemBuf decodedData; | |
1389 | decodedData.init(); | |
1390 | httpChunkDecoder->setPayloadBuffer(&decodedData); | |
1391 | const bool doneParsing = httpChunkDecoder->parse(inBuf); | |
1392 | inBuf = httpChunkDecoder->remaining(); // sync buffers after parse | |
1393 | len = decodedData.contentSize(); | |
1394 | data=decodedData.content(); | |
1395 | addVirginReplyBody(data, len); | |
1396 | if (doneParsing) { | |
1397 | lastChunk = 1; | |
1398 | flags.do_next_read = false; | |
1399 | } | |
1400 | SQUID_EXIT_THROWING_CODE(wasThereAnException); | |
1401 | return wasThereAnException; | |
1402 | } | |
1403 | ||
1404 | /** | |
1405 | * processReplyBody has two purposes: | |
1406 | * 1 - take the reply body data, if any, and put it into either | |
1407 | * the StoreEntry, or give it over to ICAP. | |
1408 | * 2 - see if we made it to the end of the response (persistent | |
1409 | * connections and such) | |
1410 | */ | |
1411 | void | |
1412 | HttpStateData::processReplyBody() | |
1413 | { | |
1414 | Ip::Address client_addr; | |
1415 | bool ispinned = false; | |
1416 | ||
1417 | if (!flags.headers_parsed) { | |
1418 | flags.do_next_read = true; | |
1419 | maybeReadVirginBody(); | |
1420 | return; | |
1421 | } | |
1422 | ||
1423 | #if USE_ADAPTATION | |
1424 | debugs(11,5, HERE << "adaptationAccessCheckPending=" << adaptationAccessCheckPending); | |
1425 | if (adaptationAccessCheckPending) | |
1426 | return; | |
1427 | ||
1428 | #endif | |
1429 | ||
1430 | /* | |
1431 | * At this point the reply headers have been parsed and consumed. | |
1432 | * That means header content has been removed from readBuf and | |
1433 | * it contains only body data. | |
1434 | */ | |
1435 | if (entry->isAccepting()) { | |
1436 | if (flags.chunked) { | |
1437 | if (!decodeAndWriteReplyBody()) { | |
1438 | flags.do_next_read = false; | |
1439 | serverComplete(); | |
1440 | return; | |
1441 | } | |
1442 | } else | |
1443 | writeReplyBody(); | |
1444 | } | |
1445 | ||
1446 | if (EBIT_TEST(entry->flags, ENTRY_ABORTED)) { | |
1447 | // The above writeReplyBody() call may have aborted the store entry. | |
1448 | abortTransaction("store entry aborted while storing reply"); | |
1449 | return; | |
1450 | } else | |
1451 | switch (persistentConnStatus()) { | |
1452 | case INCOMPLETE_MSG: { | |
1453 | debugs(11, 5, "processReplyBody: INCOMPLETE_MSG from " << serverConnection); | |
1454 | /* Wait for more data or EOF condition */ | |
1455 | AsyncCall::Pointer nil; | |
1456 | if (flags.keepalive_broken) { | |
1457 | commSetConnTimeout(serverConnection, 10, nil); | |
1458 | } else { | |
1459 | commSetConnTimeout(serverConnection, Config.Timeout.read, nil); | |
1460 | } | |
1461 | ||
1462 | flags.do_next_read = true; | |
1463 | } | |
1464 | break; | |
1465 | ||
1466 | case COMPLETE_PERSISTENT_MSG: | |
1467 | debugs(11, 5, "processReplyBody: COMPLETE_PERSISTENT_MSG from " << serverConnection); | |
1468 | /* yes we have to clear all these! */ | |
1469 | commUnsetConnTimeout(serverConnection); | |
1470 | flags.do_next_read = false; | |
1471 | ||
1472 | comm_remove_close_handler(serverConnection->fd, closeHandler); | |
1473 | closeHandler = NULL; | |
1474 | fwd->unregister(serverConnection); | |
1475 | ||
1476 | if (request->flags.spoofClientIp) | |
1477 | client_addr = request->client_addr; | |
1478 | ||
1479 | if (request->flags.pinned) { | |
1480 | ispinned = true; | |
1481 | } else if (request->flags.connectionAuth && request->flags.authSent) { | |
1482 | ispinned = true; | |
1483 | } | |
1484 | ||
1485 | if (ispinned && request->clientConnectionManager.valid()) { | |
1486 | request->clientConnectionManager->pinConnection(serverConnection, request, _peer, | |
1487 | (request->flags.connectionAuth)); | |
1488 | } else { | |
1489 | fwd->pconnPush(serverConnection, request->url.host()); | |
1490 | } | |
1491 | ||
1492 | serverConnection = NULL; | |
1493 | serverComplete(); | |
1494 | return; | |
1495 | ||
1496 | case COMPLETE_NONPERSISTENT_MSG: | |
1497 | debugs(11, 5, "processReplyBody: COMPLETE_NONPERSISTENT_MSG from " << serverConnection); | |
1498 | serverComplete(); | |
1499 | return; | |
1500 | } | |
1501 | ||
1502 | maybeReadVirginBody(); | |
1503 | } | |
1504 | ||
1505 | bool | |
1506 | HttpStateData::mayReadVirginReplyBody() const | |
1507 | { | |
1508 | // TODO: Be more precise here. For example, if/when reading trailer, we may | |
1509 | // not be doneWithServer() yet, but we should return false. Similarly, we | |
1510 | // could still be writing the request body after receiving the whole reply. | |
1511 | return !doneWithServer(); | |
1512 | } | |
1513 | ||
1514 | void | |
1515 | HttpStateData::maybeReadVirginBody() | |
1516 | { | |
1517 | // too late to read | |
1518 | if (!Comm::IsConnOpen(serverConnection) || fd_table[serverConnection->fd].closing()) | |
1519 | return; | |
1520 | ||
1521 | if (!maybeMakeSpaceAvailable(false)) | |
1522 | return; | |
1523 | ||
1524 | // XXX: get rid of the do_next_read flag | |
1525 | // check for the proper reasons preventing read(2) | |
1526 | if (!flags.do_next_read) | |
1527 | return; | |
1528 | ||
1529 | flags.do_next_read = false; | |
1530 | ||
1531 | // must not already be waiting for read(2) ... | |
1532 | assert(!Comm::MonitorsRead(serverConnection->fd)); | |
1533 | ||
1534 | // wait for read(2) to be possible. | |
1535 | typedef CommCbMemFunT<HttpStateData, CommIoCbParams> Dialer; | |
1536 | AsyncCall::Pointer call = JobCallback(11, 5, Dialer, this, HttpStateData::readReply); | |
1537 | Comm::Read(serverConnection, call); | |
1538 | } | |
1539 | ||
1540 | bool | |
1541 | HttpStateData::maybeMakeSpaceAvailable(bool doGrow) | |
1542 | { | |
1543 | // how much we are allowed to buffer | |
1544 | const int limitBuffer = (flags.headers_parsed ? Config.readAheadGap : Config.maxReplyHeaderSize); | |
1545 | ||
1546 | if (limitBuffer < 0 || inBuf.length() >= (SBuf::size_type)limitBuffer) { | |
1547 | // when buffer is at or over limit already | |
1548 | debugs(11, 7, "wont read up to " << limitBuffer << ". buffer has (" << inBuf.length() << "/" << inBuf.spaceSize() << ") from " << serverConnection); | |
1549 | debugs(11, DBG_DATA, "buffer has {" << inBuf << "}"); | |
1550 | // Process next response from buffer | |
1551 | processReply(); | |
1552 | return false; | |
1553 | } | |
1554 | ||
1555 | // how much we want to read | |
1556 | const size_t read_size = calcBufferSpaceToReserve(inBuf.spaceSize(), (limitBuffer - inBuf.length())); | |
1557 | ||
1558 | if (!read_size) { | |
1559 | debugs(11, 7, "wont read up to " << read_size << " into buffer (" << inBuf.length() << "/" << inBuf.spaceSize() << ") from " << serverConnection); | |
1560 | return false; | |
1561 | } | |
1562 | ||
1563 | // just report whether we could grow or not, dont actually do it | |
1564 | if (doGrow) | |
1565 | return (read_size >= 2); | |
1566 | ||
1567 | // we may need to grow the buffer | |
1568 | inBuf.reserveSpace(read_size); | |
1569 | debugs(11, 8, (!flags.do_next_read ? "wont" : "may") << | |
1570 | " read up to " << read_size << " bytes info buf(" << inBuf.length() << "/" << inBuf.spaceSize() << | |
1571 | ") from " << serverConnection); | |
1572 | ||
1573 | return (inBuf.spaceSize() >= 2); // only read if there is 1+ bytes of space available | |
1574 | } | |
1575 | ||
1576 | /// called after writing the very last request byte (body, last-chunk, etc) | |
1577 | void | |
1578 | HttpStateData::wroteLast(const CommIoCbParams &io) | |
1579 | { | |
1580 | debugs(11, 5, HERE << serverConnection << ": size " << io.size << ": errflag " << io.flag << "."); | |
1581 | #if URL_CHECKSUM_DEBUG | |
1582 | ||
1583 | entry->mem_obj->checkUrlChecksum(); | |
1584 | #endif | |
1585 | ||
1586 | if (io.size > 0) { | |
1587 | fd_bytes(io.fd, io.size, FD_WRITE); | |
1588 | statCounter.server.all.kbytes_out += io.size; | |
1589 | statCounter.server.http.kbytes_out += io.size; | |
1590 | } | |
1591 | ||
1592 | if (io.flag == Comm::ERR_CLOSING) | |
1593 | return; | |
1594 | ||
1595 | if (io.flag) { | |
1596 | ErrorState *err = new ErrorState(ERR_WRITE_ERROR, Http::scBadGateway, fwd->request); | |
1597 | err->xerrno = io.xerrno; | |
1598 | fwd->fail(err); | |
1599 | serverConnection->close(); | |
1600 | return; | |
1601 | } | |
1602 | ||
1603 | sendComplete(); | |
1604 | } | |
1605 | ||
1606 | /// successfully wrote the entire request (including body, last-chunk, etc.) | |
1607 | void | |
1608 | HttpStateData::sendComplete() | |
1609 | { | |
1610 | /* | |
1611 | * Set the read timeout here because it hasn't been set yet. | |
1612 | * We only set the read timeout after the request has been | |
1613 | * fully written to the peer. If we start the timeout | |
1614 | * after connection establishment, then we are likely to hit | |
1615 | * the timeout for POST/PUT requests that have very large | |
1616 | * request bodies. | |
1617 | */ | |
1618 | typedef CommCbMemFunT<HttpStateData, CommTimeoutCbParams> TimeoutDialer; | |
1619 | AsyncCall::Pointer timeoutCall = JobCallback(11, 5, | |
1620 | TimeoutDialer, this, HttpStateData::httpTimeout); | |
1621 | ||
1622 | commSetConnTimeout(serverConnection, Config.Timeout.read, timeoutCall); | |
1623 | flags.request_sent = true; | |
1624 | request->hier.peer_http_request_sent = current_time; | |
1625 | } | |
1626 | ||
1627 | // Close the HTTP server connection. Used by serverComplete(). | |
1628 | void | |
1629 | HttpStateData::closeServer() | |
1630 | { | |
1631 | debugs(11,5, HERE << "closing HTTP server " << serverConnection << " this " << this); | |
1632 | ||
1633 | if (Comm::IsConnOpen(serverConnection)) { | |
1634 | fwd->unregister(serverConnection); | |
1635 | comm_remove_close_handler(serverConnection->fd, closeHandler); | |
1636 | closeHandler = NULL; | |
1637 | serverConnection->close(); | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | bool | |
1642 | HttpStateData::doneWithServer() const | |
1643 | { | |
1644 | return !Comm::IsConnOpen(serverConnection); | |
1645 | } | |
1646 | ||
1647 | /* | |
1648 | * Fixup authentication request headers for special cases | |
1649 | */ | |
1650 | static void | |
1651 | httpFixupAuthentication(HttpRequest * request, const HttpHeader * hdr_in, HttpHeader * hdr_out, const HttpStateFlags &flags) | |
1652 | { | |
1653 | Http::HdrType header = flags.originpeer ? Http::HdrType::AUTHORIZATION : Http::HdrType::PROXY_AUTHORIZATION; | |
1654 | ||
1655 | /* Nothing to do unless we are forwarding to a peer */ | |
1656 | if (!request->flags.proxying) | |
1657 | return; | |
1658 | ||
1659 | /* Needs to be explicitly enabled */ | |
1660 | if (!request->peer_login) | |
1661 | return; | |
1662 | ||
1663 | /* Maybe already dealt with? */ | |
1664 | if (hdr_out->has(header)) | |
1665 | return; | |
1666 | ||
1667 | /* Nothing to do here for PASSTHRU */ | |
1668 | if (strcmp(request->peer_login, "PASSTHRU") == 0) | |
1669 | return; | |
1670 | ||
1671 | /* PROXYPASS is a special case, single-signon to servers with the proxy password (basic only) */ | |
1672 | if (flags.originpeer && strcmp(request->peer_login, "PROXYPASS") == 0 && hdr_in->has(Http::HdrType::PROXY_AUTHORIZATION)) { | |
1673 | const char *auth = hdr_in->getStr(Http::HdrType::PROXY_AUTHORIZATION); | |
1674 | ||
1675 | if (auth && strncasecmp(auth, "basic ", 6) == 0) { | |
1676 | hdr_out->putStr(header, auth); | |
1677 | return; | |
1678 | } | |
1679 | } | |
1680 | ||
1681 | uint8_t loginbuf[base64_encode_len(MAX_LOGIN_SZ)]; | |
1682 | size_t blen; | |
1683 | struct base64_encode_ctx ctx; | |
1684 | base64_encode_init(&ctx); | |
1685 | ||
1686 | /* Special mode to pass the username to the upstream cache */ | |
1687 | if (*request->peer_login == '*') { | |
1688 | const char *username = "-"; | |
1689 | ||
1690 | if (request->extacl_user.size()) | |
1691 | username = request->extacl_user.termedBuf(); | |
1692 | #if USE_AUTH | |
1693 | else if (request->auth_user_request != NULL) | |
1694 | username = request->auth_user_request->username(); | |
1695 | #endif | |
1696 | ||
1697 | blen = base64_encode_update(&ctx, loginbuf, strlen(username), reinterpret_cast<const uint8_t*>(username)); | |
1698 | blen += base64_encode_update(&ctx, loginbuf+blen, strlen(request->peer_login +1), reinterpret_cast<const uint8_t*>(request->peer_login +1)); | |
1699 | blen += base64_encode_final(&ctx, loginbuf+blen); | |
1700 | httpHeaderPutStrf(hdr_out, header, "Basic %.*s", (int)blen, loginbuf); | |
1701 | return; | |
1702 | } | |
1703 | ||
1704 | /* external_acl provided credentials */ | |
1705 | if (request->extacl_user.size() && request->extacl_passwd.size() && | |
1706 | (strcmp(request->peer_login, "PASS") == 0 || | |
1707 | strcmp(request->peer_login, "PROXYPASS") == 0)) { | |
1708 | ||
1709 | blen = base64_encode_update(&ctx, loginbuf, request->extacl_user.size(), reinterpret_cast<const uint8_t*>(request->extacl_user.rawBuf())); | |
1710 | blen += base64_encode_update(&ctx, loginbuf+blen, 1, reinterpret_cast<const uint8_t*>(":")); | |
1711 | blen += base64_encode_update(&ctx, loginbuf+blen, request->extacl_passwd.size(), reinterpret_cast<const uint8_t*>(request->extacl_passwd.rawBuf())); | |
1712 | blen += base64_encode_final(&ctx, loginbuf+blen); | |
1713 | httpHeaderPutStrf(hdr_out, header, "Basic %.*s", (int)blen, loginbuf); | |
1714 | return; | |
1715 | } | |
1716 | // if no external user credentials are available to fake authentication with PASS acts like PASSTHRU | |
1717 | if (strcmp(request->peer_login, "PASS") == 0) | |
1718 | return; | |
1719 | ||
1720 | /* Kerberos login to peer */ | |
1721 | #if HAVE_AUTH_MODULE_NEGOTIATE && HAVE_KRB5 && HAVE_GSSAPI | |
1722 | if (strncmp(request->peer_login, "NEGOTIATE",strlen("NEGOTIATE")) == 0) { | |
1723 | char *Token=NULL; | |
1724 | char *PrincipalName=NULL,*p; | |
1725 | if ((p=strchr(request->peer_login,':')) != NULL ) { | |
1726 | PrincipalName=++p; | |
1727 | } | |
1728 | Token = peer_proxy_negotiate_auth(PrincipalName, request->peer_host); | |
1729 | if (Token) { | |
1730 | httpHeaderPutStrf(hdr_out, header, "Negotiate %s",Token); | |
1731 | } | |
1732 | return; | |
1733 | } | |
1734 | #endif /* HAVE_KRB5 && HAVE_GSSAPI */ | |
1735 | ||
1736 | blen = base64_encode_update(&ctx, loginbuf, strlen(request->peer_login), reinterpret_cast<const uint8_t*>(request->peer_login)); | |
1737 | blen += base64_encode_final(&ctx, loginbuf+blen); | |
1738 | httpHeaderPutStrf(hdr_out, header, "Basic %.*s", (int)blen, loginbuf); | |
1739 | return; | |
1740 | } | |
1741 | ||
1742 | /* | |
1743 | * build request headers and append them to a given MemBuf | |
1744 | * used by buildRequestPrefix() | |
1745 | * note: initialised the HttpHeader, the caller is responsible for Clean()-ing | |
1746 | */ | |
1747 | void | |
1748 | HttpStateData::httpBuildRequestHeader(HttpRequest * request, | |
1749 | StoreEntry * entry, | |
1750 | const AccessLogEntryPointer &al, | |
1751 | HttpHeader * hdr_out, | |
1752 | const HttpStateFlags &flags) | |
1753 | { | |
1754 | /* building buffer for complex strings */ | |
1755 | #define BBUF_SZ (MAX_URL+32) | |
1756 | LOCAL_ARRAY(char, bbuf, BBUF_SZ); | |
1757 | LOCAL_ARRAY(char, ntoabuf, MAX_IPSTRLEN); | |
1758 | const HttpHeader *hdr_in = &request->header; | |
1759 | const HttpHeaderEntry *e = NULL; | |
1760 | HttpHeaderPos pos = HttpHeaderInitPos; | |
1761 | assert (hdr_out->owner == hoRequest); | |
1762 | ||
1763 | /* use our IMS header if the cached entry has Last-Modified time */ | |
1764 | if (request->lastmod > -1) | |
1765 | hdr_out->putTime(Http::HdrType::IF_MODIFIED_SINCE, request->lastmod); | |
1766 | ||
1767 | // Add our own If-None-Match field if the cached entry has a strong ETag. | |
1768 | // copyOneHeaderFromClientsideRequestToUpstreamRequest() adds client ones. | |
1769 | if (request->etag.size() > 0) { | |
1770 | hdr_out->addEntry(new HttpHeaderEntry(Http::HdrType::IF_NONE_MATCH, NULL, | |
1771 | request->etag.termedBuf())); | |
1772 | } | |
1773 | ||
1774 | bool we_do_ranges = decideIfWeDoRanges (request); | |
1775 | ||
1776 | String strConnection (hdr_in->getList(Http::HdrType::CONNECTION)); | |
1777 | ||
1778 | while ((e = hdr_in->getEntry(&pos))) | |
1779 | copyOneHeaderFromClientsideRequestToUpstreamRequest(e, strConnection, request, hdr_out, we_do_ranges, flags); | |
1780 | ||
1781 | /* Abstraction break: We should interpret multipart/byterange responses | |
1782 | * into offset-length data, and this works around our inability to do so. | |
1783 | */ | |
1784 | if (!we_do_ranges && request->multipartRangeRequest()) { | |
1785 | /* don't cache the result */ | |
1786 | request->flags.cachable = false; | |
1787 | /* pretend it's not a range request */ | |
1788 | request->ignoreRange("want to request the whole object"); | |
1789 | request->flags.isRanged = false; | |
1790 | } | |
1791 | ||
1792 | /* append Via */ | |
1793 | if (Config.onoff.via) { | |
1794 | String strVia; | |
1795 | strVia = hdr_in->getList(Http::HdrType::VIA); | |
1796 | snprintf(bbuf, BBUF_SZ, "%d.%d %s", | |
1797 | request->http_ver.major, | |
1798 | request->http_ver.minor, ThisCache); | |
1799 | strListAdd(&strVia, bbuf, ','); | |
1800 | hdr_out->putStr(Http::HdrType::VIA, strVia.termedBuf()); | |
1801 | strVia.clean(); | |
1802 | } | |
1803 | ||
1804 | if (request->flags.accelerated) { | |
1805 | /* Append Surrogate-Capabilities */ | |
1806 | String strSurrogate(hdr_in->getList(Http::HdrType::SURROGATE_CAPABILITY)); | |
1807 | #if USE_SQUID_ESI | |
1808 | snprintf(bbuf, BBUF_SZ, "%s=\"Surrogate/1.0 ESI/1.0\"", Config.Accel.surrogate_id); | |
1809 | #else | |
1810 | snprintf(bbuf, BBUF_SZ, "%s=\"Surrogate/1.0\"", Config.Accel.surrogate_id); | |
1811 | #endif | |
1812 | strListAdd(&strSurrogate, bbuf, ','); | |
1813 | hdr_out->putStr(Http::HdrType::SURROGATE_CAPABILITY, strSurrogate.termedBuf()); | |
1814 | } | |
1815 | ||
1816 | /** \pre Handle X-Forwarded-For */ | |
1817 | if (strcmp(opt_forwarded_for, "delete") != 0) { | |
1818 | ||
1819 | String strFwd = hdr_in->getList(Http::HdrType::X_FORWARDED_FOR); | |
1820 | ||
1821 | if (strFwd.size() > 65536/2) { | |
1822 | // There is probably a forwarding loop with Via detection disabled. | |
1823 | // If we do nothing, String will assert on overflow soon. | |
1824 | // TODO: Terminate all transactions with huge XFF? | |
1825 | strFwd = "error"; | |
1826 | ||
1827 | static int warnedCount = 0; | |
1828 | if (warnedCount++ < 100) { | |
1829 | const SBuf url(entry ? SBuf(entry->url()) : request->effectiveRequestUri()); | |
1830 | debugs(11, DBG_IMPORTANT, "Warning: likely forwarding loop with " << url); | |
1831 | } | |
1832 | } | |
1833 | ||
1834 | if (strcmp(opt_forwarded_for, "on") == 0) { | |
1835 | /** If set to ON - append client IP or 'unknown'. */ | |
1836 | if ( request->client_addr.isNoAddr() ) | |
1837 | strListAdd(&strFwd, "unknown", ','); | |
1838 | else | |
1839 | strListAdd(&strFwd, request->client_addr.toStr(ntoabuf, MAX_IPSTRLEN), ','); | |
1840 | } else if (strcmp(opt_forwarded_for, "off") == 0) { | |
1841 | /** If set to OFF - append 'unknown'. */ | |
1842 | strListAdd(&strFwd, "unknown", ','); | |
1843 | } else if (strcmp(opt_forwarded_for, "transparent") == 0) { | |
1844 | /** If set to TRANSPARENT - pass through unchanged. */ | |
1845 | } else if (strcmp(opt_forwarded_for, "truncate") == 0) { | |
1846 | /** If set to TRUNCATE - drop existing list and replace with client IP or 'unknown'. */ | |
1847 | if ( request->client_addr.isNoAddr() ) | |
1848 | strFwd = "unknown"; | |
1849 | else | |
1850 | strFwd = request->client_addr.toStr(ntoabuf, MAX_IPSTRLEN); | |
1851 | } | |
1852 | if (strFwd.size() > 0) | |
1853 | hdr_out->putStr(Http::HdrType::X_FORWARDED_FOR, strFwd.termedBuf()); | |
1854 | } | |
1855 | /** If set to DELETE - do not copy through. */ | |
1856 | ||
1857 | /* append Host if not there already */ | |
1858 | if (!hdr_out->has(Http::HdrType::HOST)) { | |
1859 | if (request->peer_domain) { | |
1860 | hdr_out->putStr(Http::HdrType::HOST, request->peer_domain); | |
1861 | } else { | |
1862 | SBuf authority = request->url.authority(); | |
1863 | hdr_out->putStr(Http::HdrType::HOST, authority.c_str()); | |
1864 | } | |
1865 | } | |
1866 | ||
1867 | /* append Authorization if known in URL, not in header and going direct */ | |
1868 | if (!hdr_out->has(Http::HdrType::AUTHORIZATION)) { | |
1869 | if (!request->flags.proxying && !request->url.userInfo().isEmpty()) { | |
1870 | static uint8_t result[base64_encode_len(MAX_URL*2)]; // should be big enough for a single URI segment | |
1871 | struct base64_encode_ctx ctx; | |
1872 | base64_encode_init(&ctx); | |
1873 | size_t blen = base64_encode_update(&ctx, result, request->url.userInfo().length(), reinterpret_cast<const uint8_t*>(request->url.userInfo().rawContent())); | |
1874 | blen += base64_encode_final(&ctx, result+blen); | |
1875 | result[blen] = '\0'; | |
1876 | if (blen) | |
1877 | httpHeaderPutStrf(hdr_out, Http::HdrType::AUTHORIZATION, "Basic %.*s", (int)blen, result); | |
1878 | } | |
1879 | } | |
1880 | ||
1881 | /* Fixup (Proxy-)Authorization special cases. Plain relaying dealt with above */ | |
1882 | httpFixupAuthentication(request, hdr_in, hdr_out, flags); | |
1883 | ||
1884 | /* append Cache-Control, add max-age if not there already */ | |
1885 | { | |
1886 | HttpHdrCc *cc = hdr_in->getCc(); | |
1887 | ||
1888 | if (!cc) | |
1889 | cc = new HttpHdrCc(); | |
1890 | ||
1891 | #if 0 /* see bug 2330 */ | |
1892 | /* Set no-cache if determined needed but not found */ | |
1893 | if (request->flags.nocache) | |
1894 | EBIT_SET(cc->mask, HttpHdrCcType::CC_NO_CACHE); | |
1895 | #endif | |
1896 | ||
1897 | /* Add max-age only without no-cache */ | |
1898 | if (!cc->hasMaxAge() && !cc->hasNoCache()) { | |
1899 | // XXX: performance regression. c_str() reallocates | |
1900 | SBuf tmp(request->effectiveRequestUri()); | |
1901 | cc->maxAge(getMaxAge(entry ? entry->url() : tmp.c_str())); | |
1902 | } | |
1903 | ||
1904 | /* Enforce sibling relations */ | |
1905 | if (flags.only_if_cached) | |
1906 | cc->onlyIfCached(true); | |
1907 | ||
1908 | hdr_out->putCc(cc); | |
1909 | ||
1910 | delete cc; | |
1911 | } | |
1912 | ||
1913 | /* maybe append Connection: keep-alive */ | |
1914 | if (flags.keepalive) { | |
1915 | hdr_out->putStr(Http::HdrType::CONNECTION, "keep-alive"); | |
1916 | } | |
1917 | ||
1918 | /* append Front-End-Https */ | |
1919 | if (flags.front_end_https) { | |
1920 | if (flags.front_end_https == 1 || request->url.getScheme() == AnyP::PROTO_HTTPS) | |
1921 | hdr_out->putStr(Http::HdrType::FRONT_END_HTTPS, "On"); | |
1922 | } | |
1923 | ||
1924 | if (flags.chunked_request) { | |
1925 | // Do not just copy the original value so that if the client-side | |
1926 | // starts decode other encodings, this code may remain valid. | |
1927 | hdr_out->putStr(Http::HdrType::TRANSFER_ENCODING, "chunked"); | |
1928 | } | |
1929 | ||
1930 | /* Now mangle the headers. */ | |
1931 | if (Config2.onoff.mangle_request_headers) | |
1932 | httpHdrMangleList(hdr_out, request, ROR_REQUEST); | |
1933 | ||
1934 | if (Config.request_header_add && !Config.request_header_add->empty()) | |
1935 | httpHdrAdd(hdr_out, request, al, *Config.request_header_add); | |
1936 | ||
1937 | strConnection.clean(); | |
1938 | } | |
1939 | ||
1940 | /** | |
1941 | * Decides whether a particular header may be cloned from the received Clients request | |
1942 | * to our outgoing fetch request. | |
1943 | */ | |
1944 | void | |
1945 | copyOneHeaderFromClientsideRequestToUpstreamRequest(const HttpHeaderEntry *e, const String strConnection, const HttpRequest * request, HttpHeader * hdr_out, const int we_do_ranges, const HttpStateFlags &flags) | |
1946 | { | |
1947 | debugs(11, 5, "httpBuildRequestHeader: " << e->name << ": " << e->value ); | |
1948 | ||
1949 | switch (e->id) { | |
1950 | ||
1951 | /** \par RFC 2616 sect 13.5.1 - Hop-by-Hop headers which Squid should not pass on. */ | |
1952 | ||
1953 | case Http::HdrType::PROXY_AUTHORIZATION: | |
1954 | /** \par Proxy-Authorization: | |
1955 | * Only pass on proxy authentication to peers for which | |
1956 | * authentication forwarding is explicitly enabled | |
1957 | */ | |
1958 | if (!flags.originpeer && flags.proxying && request->peer_login && | |
1959 | (strcmp(request->peer_login, "PASS") == 0 || | |
1960 | strcmp(request->peer_login, "PROXYPASS") == 0 || | |
1961 | strcmp(request->peer_login, "PASSTHRU") == 0)) { | |
1962 | hdr_out->addEntry(e->clone()); | |
1963 | } | |
1964 | break; | |
1965 | ||
1966 | /** \par RFC 2616 sect 13.5.1 - Hop-by-Hop headers which Squid does not pass on. */ | |
1967 | ||
1968 | case Http::HdrType::CONNECTION: /** \par Connection: */ | |
1969 | case Http::HdrType::TE: /** \par TE: */ | |
1970 | case Http::HdrType::KEEP_ALIVE: /** \par Keep-Alive: */ | |
1971 | case Http::HdrType::PROXY_AUTHENTICATE: /** \par Proxy-Authenticate: */ | |
1972 | case Http::HdrType::TRAILER: /** \par Trailer: */ | |
1973 | case Http::HdrType::UPGRADE: /** \par Upgrade: */ | |
1974 | case Http::HdrType::TRANSFER_ENCODING: /** \par Transfer-Encoding: */ | |
1975 | break; | |
1976 | ||
1977 | /** \par OTHER headers I haven't bothered to track down yet. */ | |
1978 | ||
1979 | case Http::HdrType::AUTHORIZATION: | |
1980 | /** \par WWW-Authorization: | |
1981 | * Pass on WWW authentication */ | |
1982 | ||
1983 | if (!flags.originpeer) { | |
1984 | hdr_out->addEntry(e->clone()); | |
1985 | } else { | |
1986 | /** \note In accelerators, only forward authentication if enabled | |
1987 | * (see also httpFixupAuthentication for special cases) | |
1988 | */ | |
1989 | if (request->peer_login && | |
1990 | (strcmp(request->peer_login, "PASS") == 0 || | |
1991 | strcmp(request->peer_login, "PASSTHRU") == 0 || | |
1992 | strcmp(request->peer_login, "PROXYPASS") == 0)) { | |
1993 | hdr_out->addEntry(e->clone()); | |
1994 | } | |
1995 | } | |
1996 | ||
1997 | break; | |
1998 | ||
1999 | case Http::HdrType::HOST: | |
2000 | /** \par Host: | |
2001 | * Normally Squid rewrites the Host: header. | |
2002 | * However, there is one case when we don't: If the URL | |
2003 | * went through our redirector and the admin configured | |
2004 | * 'redir_rewrites_host' to be off. | |
2005 | */ | |
2006 | if (request->peer_domain) | |
2007 | hdr_out->putStr(Http::HdrType::HOST, request->peer_domain); | |
2008 | else if (request->flags.redirected && !Config.onoff.redir_rewrites_host) | |
2009 | hdr_out->addEntry(e->clone()); | |
2010 | else { | |
2011 | SBuf authority = request->url.authority(); | |
2012 | hdr_out->putStr(Http::HdrType::HOST, authority.c_str()); | |
2013 | } | |
2014 | ||
2015 | break; | |
2016 | ||
2017 | case Http::HdrType::IF_MODIFIED_SINCE: | |
2018 | /** \par If-Modified-Since: | |
2019 | * append unless we added our own, | |
2020 | * but only if cache_miss_revalidate is enabled, or | |
2021 | * the request is not cacheable, or | |
2022 | * the request contains authentication credentials. | |
2023 | * \note at most one client's If-Modified-Since header can pass through | |
2024 | */ | |
2025 | // XXX: need to check and cleanup the auth case so cacheable auth requests get cached. | |
2026 | if (hdr_out->has(Http::HdrType::IF_MODIFIED_SINCE)) | |
2027 | break; | |
2028 | else if (Config.onoff.cache_miss_revalidate || !request->flags.cachable || request->flags.auth) | |
2029 | hdr_out->addEntry(e->clone()); | |
2030 | break; | |
2031 | ||
2032 | case Http::HdrType::IF_NONE_MATCH: | |
2033 | /** \par If-None-Match: | |
2034 | * append if the wildcard '*' special case value is present, or | |
2035 | * cache_miss_revalidate is disabled, or | |
2036 | * the request is not cacheable in this proxy, or | |
2037 | * the request contains authentication credentials. | |
2038 | * \note this header lists a set of responses for the server to elide sending. Squid added values are extending that set. | |
2039 | */ | |
2040 | // XXX: need to check and cleanup the auth case so cacheable auth requests get cached. | |
2041 | if (hdr_out->hasListMember(Http::HdrType::IF_MATCH, "*", ',') || Config.onoff.cache_miss_revalidate || !request->flags.cachable || request->flags.auth) | |
2042 | hdr_out->addEntry(e->clone()); | |
2043 | break; | |
2044 | ||
2045 | case Http::HdrType::MAX_FORWARDS: | |
2046 | /** \par Max-Forwards: | |
2047 | * pass only on TRACE or OPTIONS requests */ | |
2048 | if (request->method == Http::METHOD_TRACE || request->method == Http::METHOD_OPTIONS) { | |
2049 | const int64_t hops = e->getInt64(); | |
2050 | ||
2051 | if (hops > 0) | |
2052 | hdr_out->putInt64(Http::HdrType::MAX_FORWARDS, hops - 1); | |
2053 | } | |
2054 | ||
2055 | break; | |
2056 | ||
2057 | case Http::HdrType::VIA: | |
2058 | /** \par Via: | |
2059 | * If Via is disabled then forward any received header as-is. | |
2060 | * Otherwise leave for explicit updated addition later. */ | |
2061 | ||
2062 | if (!Config.onoff.via) | |
2063 | hdr_out->addEntry(e->clone()); | |
2064 | ||
2065 | break; | |
2066 | ||
2067 | case Http::HdrType::RANGE: | |
2068 | ||
2069 | case Http::HdrType::IF_RANGE: | |
2070 | ||
2071 | case Http::HdrType::REQUEST_RANGE: | |
2072 | /** \par Range:, If-Range:, Request-Range: | |
2073 | * Only pass if we accept ranges */ | |
2074 | if (!we_do_ranges) | |
2075 | hdr_out->addEntry(e->clone()); | |
2076 | ||
2077 | break; | |
2078 | ||
2079 | case Http::HdrType::PROXY_CONNECTION: // SHOULD ignore. But doing so breaks things. | |
2080 | break; | |
2081 | ||
2082 | case Http::HdrType::CONTENT_LENGTH: | |
2083 | // pass through unless we chunk; also, keeping this away from default | |
2084 | // prevents request smuggling via Connection: Content-Length tricks | |
2085 | if (!flags.chunked_request) | |
2086 | hdr_out->addEntry(e->clone()); | |
2087 | break; | |
2088 | ||
2089 | case Http::HdrType::X_FORWARDED_FOR: | |
2090 | ||
2091 | case Http::HdrType::CACHE_CONTROL: | |
2092 | /** \par X-Forwarded-For:, Cache-Control: | |
2093 | * handled specially by Squid, so leave off for now. | |
2094 | * append these after the loop if needed */ | |
2095 | break; | |
2096 | ||
2097 | case Http::HdrType::FRONT_END_HTTPS: | |
2098 | /** \par Front-End-Https: | |
2099 | * Pass thru only if peer is configured with front-end-https */ | |
2100 | if (!flags.front_end_https) | |
2101 | hdr_out->addEntry(e->clone()); | |
2102 | ||
2103 | break; | |
2104 | ||
2105 | default: | |
2106 | /** \par default. | |
2107 | * pass on all other header fields | |
2108 | * which are NOT listed by the special Connection: header. */ | |
2109 | ||
2110 | if (strConnection.size()>0 && strListIsMember(&strConnection, e->name.termedBuf(), ',')) { | |
2111 | debugs(11, 2, "'" << e->name << "' header cropped by Connection: definition"); | |
2112 | return; | |
2113 | } | |
2114 | ||
2115 | hdr_out->addEntry(e->clone()); | |
2116 | } | |
2117 | } | |
2118 | ||
2119 | bool | |
2120 | HttpStateData::decideIfWeDoRanges (HttpRequest * request) | |
2121 | { | |
2122 | bool result = true; | |
2123 | /* decide if we want to do Ranges ourselves | |
2124 | * and fetch the whole object now) | |
2125 | * We want to handle Ranges ourselves iff | |
2126 | * - we can actually parse client Range specs | |
2127 | * - the specs are expected to be simple enough (e.g. no out-of-order ranges) | |
2128 | * - reply will be cachable | |
2129 | * (If the reply will be uncachable we have to throw it away after | |
2130 | * serving this request, so it is better to forward ranges to | |
2131 | * the server and fetch only the requested content) | |
2132 | */ | |
2133 | ||
2134 | int64_t roffLimit = request->getRangeOffsetLimit(); | |
2135 | ||
2136 | if (NULL == request->range || !request->flags.cachable | |
2137 | || request->range->offsetLimitExceeded(roffLimit) || request->flags.connectionAuth) | |
2138 | result = false; | |
2139 | ||
2140 | debugs(11, 8, "decideIfWeDoRanges: range specs: " << | |
2141 | request->range << ", cachable: " << | |
2142 | request->flags.cachable << "; we_do_ranges: " << result); | |
2143 | ||
2144 | return result; | |
2145 | } | |
2146 | ||
2147 | /* build request prefix and append it to a given MemBuf; | |
2148 | * return the length of the prefix */ | |
2149 | mb_size_t | |
2150 | HttpStateData::buildRequestPrefix(MemBuf * mb) | |
2151 | { | |
2152 | const int offset = mb->size; | |
2153 | /* Uses a local httpver variable to print the HTTP label | |
2154 | * since the HttpRequest may have an older version label. | |
2155 | * XXX: This could create protocol bugs as the headers sent and | |
2156 | * flow control should all be based on the HttpRequest version | |
2157 | * not the one we are sending. Needs checking. | |
2158 | */ | |
2159 | const AnyP::ProtocolVersion httpver = Http::ProtocolVersion(); | |
2160 | const SBuf url(_peer && !_peer->options.originserver ? request->effectiveRequestUri() : request->url.path()); | |
2161 | mb->appendf(SQUIDSBUFPH " " SQUIDSBUFPH " %s/%d.%d\r\n", | |
2162 | SQUIDSBUFPRINT(request->method.image()), | |
2163 | SQUIDSBUFPRINT(url), | |
2164 | AnyP::ProtocolType_str[httpver.protocol], | |
2165 | httpver.major,httpver.minor); | |
2166 | /* build and pack headers */ | |
2167 | { | |
2168 | HttpHeader hdr(hoRequest); | |
2169 | httpBuildRequestHeader(request, entry, fwd->al, &hdr, flags); | |
2170 | ||
2171 | if (request->flags.pinned && request->flags.connectionAuth) | |
2172 | request->flags.authSent = true; | |
2173 | else if (hdr.has(Http::HdrType::AUTHORIZATION)) | |
2174 | request->flags.authSent = true; | |
2175 | ||
2176 | hdr.packInto(mb); | |
2177 | hdr.clean(); | |
2178 | } | |
2179 | /* append header terminator */ | |
2180 | mb->append(crlf, 2); | |
2181 | return mb->size - offset; | |
2182 | } | |
2183 | ||
2184 | /* This will be called when connect completes. Write request. */ | |
2185 | bool | |
2186 | HttpStateData::sendRequest() | |
2187 | { | |
2188 | MemBuf mb; | |
2189 | ||
2190 | debugs(11, 5, HERE << serverConnection << ", request " << request << ", this " << this << "."); | |
2191 | ||
2192 | if (!Comm::IsConnOpen(serverConnection)) { | |
2193 | debugs(11,3, HERE << "cannot send request to closing " << serverConnection); | |
2194 | assert(closeHandler != NULL); | |
2195 | return false; | |
2196 | } | |
2197 | ||
2198 | typedef CommCbMemFunT<HttpStateData, CommTimeoutCbParams> TimeoutDialer; | |
2199 | AsyncCall::Pointer timeoutCall = JobCallback(11, 5, | |
2200 | TimeoutDialer, this, HttpStateData::httpTimeout); | |
2201 | commSetConnTimeout(serverConnection, Config.Timeout.lifetime, timeoutCall); | |
2202 | flags.do_next_read = true; | |
2203 | maybeReadVirginBody(); | |
2204 | ||
2205 | if (request->body_pipe != NULL) { | |
2206 | if (!startRequestBodyFlow()) // register to receive body data | |
2207 | return false; | |
2208 | typedef CommCbMemFunT<HttpStateData, CommIoCbParams> Dialer; | |
2209 | requestSender = JobCallback(11,5, | |
2210 | Dialer, this, HttpStateData::sentRequestBody); | |
2211 | ||
2212 | Must(!flags.chunked_request); | |
2213 | // use chunked encoding if we do not know the length | |
2214 | if (request->content_length < 0) | |
2215 | flags.chunked_request = true; | |
2216 | } else { | |
2217 | assert(!requestBodySource); | |
2218 | typedef CommCbMemFunT<HttpStateData, CommIoCbParams> Dialer; | |
2219 | requestSender = JobCallback(11,5, | |
2220 | Dialer, this, HttpStateData::wroteLast); | |
2221 | } | |
2222 | ||
2223 | flags.originpeer = (_peer != NULL && _peer->options.originserver); | |
2224 | flags.proxying = (_peer != NULL && !flags.originpeer); | |
2225 | ||
2226 | /* | |
2227 | * Is keep-alive okay for all request methods? | |
2228 | */ | |
2229 | if (request->flags.mustKeepalive) | |
2230 | flags.keepalive = true; | |
2231 | else if (request->flags.pinned) | |
2232 | flags.keepalive = request->persistent(); | |
2233 | else if (!Config.onoff.server_pconns) | |
2234 | flags.keepalive = false; | |
2235 | else if (_peer == NULL) | |
2236 | flags.keepalive = true; | |
2237 | else if (_peer->stats.n_keepalives_sent < 10) | |
2238 | flags.keepalive = true; | |
2239 | else if ((double) _peer->stats.n_keepalives_recv / | |
2240 | (double) _peer->stats.n_keepalives_sent > 0.50) | |
2241 | flags.keepalive = true; | |
2242 | ||
2243 | if (_peer) { | |
2244 | /*The old code here was | |
2245 | if (neighborType(_peer, request->url) == PEER_SIBLING && ... | |
2246 | which is equivalent to: | |
2247 | if (neighborType(_peer, URL()) == PEER_SIBLING && ... | |
2248 | or better: | |
2249 | if (((_peer->type == PEER_MULTICAST && p->options.mcast_siblings) || | |
2250 | _peer->type == PEER_SIBLINGS ) && _peer->options.allow_miss) | |
2251 | flags.only_if_cached = 1; | |
2252 | ||
2253 | But I suppose it was a bug | |
2254 | */ | |
2255 | if (neighborType(_peer, request->url) == PEER_SIBLING && !_peer->options.allow_miss) | |
2256 | flags.only_if_cached = true; | |
2257 | ||
2258 | flags.front_end_https = _peer->front_end_https; | |
2259 | } | |
2260 | ||
2261 | mb.init(); | |
2262 | request->peer_host=_peer?_peer->host:NULL; | |
2263 | buildRequestPrefix(&mb); | |
2264 | ||
2265 | debugs(11, 2, "HTTP Server " << serverConnection); | |
2266 | debugs(11, 2, "HTTP Server REQUEST:\n---------\n" << mb.buf << "\n----------"); | |
2267 | ||
2268 | Comm::Write(serverConnection, &mb, requestSender); | |
2269 | return true; | |
2270 | } | |
2271 | ||
2272 | bool | |
2273 | HttpStateData::getMoreRequestBody(MemBuf &buf) | |
2274 | { | |
2275 | // parent's implementation can handle the no-encoding case | |
2276 | if (!flags.chunked_request) | |
2277 | return Client::getMoreRequestBody(buf); | |
2278 | ||
2279 | MemBuf raw; | |
2280 | ||
2281 | Must(requestBodySource != NULL); | |
2282 | if (!requestBodySource->getMoreData(raw)) | |
2283 | return false; // no request body bytes to chunk yet | |
2284 | ||
2285 | // optimization: pre-allocate buffer size that should be enough | |
2286 | const mb_size_t rawDataSize = raw.contentSize(); | |
2287 | // we may need to send: hex-chunk-size CRLF raw-data CRLF last-chunk | |
2288 | buf.init(16 + 2 + rawDataSize + 2 + 5, raw.max_capacity); | |
2289 | ||
2290 | buf.appendf("%x\r\n", static_cast<unsigned int>(rawDataSize)); | |
2291 | buf.append(raw.content(), rawDataSize); | |
2292 | buf.append("\r\n", 2); | |
2293 | ||
2294 | Must(rawDataSize > 0); // we did not accidently created last-chunk above | |
2295 | ||
2296 | // Do not send last-chunk unless we successfully received everything | |
2297 | if (receivedWholeRequestBody) { | |
2298 | Must(!flags.sentLastChunk); | |
2299 | flags.sentLastChunk = true; | |
2300 | buf.append("0\r\n\r\n", 5); | |
2301 | } | |
2302 | ||
2303 | return true; | |
2304 | } | |
2305 | ||
2306 | void | |
2307 | httpStart(FwdState *fwd) | |
2308 | { | |
2309 | debugs(11, 3, fwd->request->method << ' ' << fwd->entry->url()); | |
2310 | AsyncJob::Start(new HttpStateData(fwd)); | |
2311 | } | |
2312 | ||
2313 | void | |
2314 | HttpStateData::start() | |
2315 | { | |
2316 | if (!sendRequest()) { | |
2317 | debugs(11, 3, "httpStart: aborted"); | |
2318 | mustStop("HttpStateData::start failed"); | |
2319 | return; | |
2320 | } | |
2321 | ||
2322 | ++ statCounter.server.all.requests; | |
2323 | ++ statCounter.server.http.requests; | |
2324 | ||
2325 | /* | |
2326 | * We used to set the read timeout here, but not any more. | |
2327 | * Now its set in httpSendComplete() after the full request, | |
2328 | * including request body, has been written to the server. | |
2329 | */ | |
2330 | } | |
2331 | ||
2332 | /// if broken posts are enabled for the request, try to fix and return true | |
2333 | bool | |
2334 | HttpStateData::finishingBrokenPost() | |
2335 | { | |
2336 | #if USE_HTTP_VIOLATIONS | |
2337 | if (!Config.accessList.brokenPosts) { | |
2338 | debugs(11, 5, HERE << "No brokenPosts list"); | |
2339 | return false; | |
2340 | } | |
2341 | ||
2342 | ACLFilledChecklist ch(Config.accessList.brokenPosts, originalRequest(), NULL); | |
2343 | if (ch.fastCheck() != ACCESS_ALLOWED) { | |
2344 | debugs(11, 5, HERE << "didn't match brokenPosts"); | |
2345 | return false; | |
2346 | } | |
2347 | ||
2348 | if (!Comm::IsConnOpen(serverConnection)) { | |
2349 | debugs(11, 3, HERE << "ignoring broken POST for closed " << serverConnection); | |
2350 | assert(closeHandler != NULL); | |
2351 | return true; // prevent caller from proceeding as if nothing happened | |
2352 | } | |
2353 | ||
2354 | debugs(11, 3, "finishingBrokenPost: fixing broken POST"); | |
2355 | typedef CommCbMemFunT<HttpStateData, CommIoCbParams> Dialer; | |
2356 | requestSender = JobCallback(11,5, | |
2357 | Dialer, this, HttpStateData::wroteLast); | |
2358 | Comm::Write(serverConnection, "\r\n", 2, requestSender, NULL); | |
2359 | return true; | |
2360 | #else | |
2361 | return false; | |
2362 | #endif /* USE_HTTP_VIOLATIONS */ | |
2363 | } | |
2364 | ||
2365 | /// if needed, write last-chunk to end the request body and return true | |
2366 | bool | |
2367 | HttpStateData::finishingChunkedRequest() | |
2368 | { | |
2369 | if (flags.sentLastChunk) { | |
2370 | debugs(11, 5, HERE << "already sent last-chunk"); | |
2371 | return false; | |
2372 | } | |
2373 | ||
2374 | Must(receivedWholeRequestBody); // or we should not be sending last-chunk | |
2375 | flags.sentLastChunk = true; | |
2376 | ||
2377 | typedef CommCbMemFunT<HttpStateData, CommIoCbParams> Dialer; | |
2378 | requestSender = JobCallback(11,5, Dialer, this, HttpStateData::wroteLast); | |
2379 | Comm::Write(serverConnection, "0\r\n\r\n", 5, requestSender, NULL); | |
2380 | return true; | |
2381 | } | |
2382 | ||
2383 | void | |
2384 | HttpStateData::doneSendingRequestBody() | |
2385 | { | |
2386 | Client::doneSendingRequestBody(); | |
2387 | debugs(11,5, HERE << serverConnection); | |
2388 | ||
2389 | // do we need to write something after the last body byte? | |
2390 | if (flags.chunked_request && finishingChunkedRequest()) | |
2391 | return; | |
2392 | if (!flags.chunked_request && finishingBrokenPost()) | |
2393 | return; | |
2394 | ||
2395 | sendComplete(); | |
2396 | } | |
2397 | ||
2398 | // more origin request body data is available | |
2399 | void | |
2400 | HttpStateData::handleMoreRequestBodyAvailable() | |
2401 | { | |
2402 | if (eof || !Comm::IsConnOpen(serverConnection)) { | |
2403 | // XXX: we should check this condition in other callbacks then! | |
2404 | // TODO: Check whether this can actually happen: We should unsubscribe | |
2405 | // as a body consumer when the above condition(s) are detected. | |
2406 | debugs(11, DBG_IMPORTANT, HERE << "Transaction aborted while reading HTTP body"); | |
2407 | return; | |
2408 | } | |
2409 | ||
2410 | assert(requestBodySource != NULL); | |
2411 | ||
2412 | if (requestBodySource->buf().hasContent()) { | |
2413 | // XXX: why does not this trigger a debug message on every request? | |
2414 | ||
2415 | if (flags.headers_parsed && !flags.abuse_detected) { | |
2416 | flags.abuse_detected = true; | |
2417 | debugs(11, DBG_IMPORTANT, "http handleMoreRequestBodyAvailable: Likely proxy abuse detected '" << request->client_addr << "' -> '" << entry->url() << "'" ); | |
2418 | ||
2419 | if (virginReply()->sline.status() == Http::scInvalidHeader) { | |
2420 | serverConnection->close(); | |
2421 | return; | |
2422 | } | |
2423 | } | |
2424 | } | |
2425 | ||
2426 | HttpStateData::handleMoreRequestBodyAvailable(); | |
2427 | } | |
2428 | ||
2429 | // premature end of the request body | |
2430 | void | |
2431 | HttpStateData::handleRequestBodyProducerAborted() | |
2432 | { | |
2433 | Client::handleRequestBodyProducerAborted(); | |
2434 | if (entry->isEmpty()) { | |
2435 | debugs(11, 3, "request body aborted: " << serverConnection); | |
2436 | // We usually get here when ICAP REQMOD aborts during body processing. | |
2437 | // We might also get here if client-side aborts, but then our response | |
2438 | // should not matter because either client-side will provide its own or | |
2439 | // there will be no response at all (e.g., if the the client has left). | |
2440 | ErrorState *err = new ErrorState(ERR_ICAP_FAILURE, Http::scInternalServerError, fwd->request); | |
2441 | err->detailError(ERR_DETAIL_SRV_REQMOD_REQ_BODY); | |
2442 | fwd->fail(err); | |
2443 | } | |
2444 | ||
2445 | abortTransaction("request body producer aborted"); | |
2446 | } | |
2447 | ||
2448 | // called when we wrote request headers(!) or a part of the body | |
2449 | void | |
2450 | HttpStateData::sentRequestBody(const CommIoCbParams &io) | |
2451 | { | |
2452 | if (io.size > 0) | |
2453 | statCounter.server.http.kbytes_out += io.size; | |
2454 | ||
2455 | Client::sentRequestBody(io); | |
2456 | } | |
2457 | ||
2458 | // Quickly abort the transaction | |
2459 | // TODO: destruction should be sufficient as the destructor should cleanup, | |
2460 | // including canceling close handlers | |
2461 | void | |
2462 | HttpStateData::abortTransaction(const char *reason) | |
2463 | { | |
2464 | debugs(11,5, HERE << "aborting transaction for " << reason << | |
2465 | "; " << serverConnection << ", this " << this); | |
2466 | ||
2467 | if (Comm::IsConnOpen(serverConnection)) { | |
2468 | serverConnection->close(); | |
2469 | return; | |
2470 | } | |
2471 | ||
2472 | fwd->handleUnregisteredServerEnd(); | |
2473 | mustStop("HttpStateData::abortTransaction"); | |
2474 | } | |
2475 |