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Diffstat (limited to 'netwerk/protocol/http/nsHttpResponseHead.cpp')
-rw-r--r-- | netwerk/protocol/http/nsHttpResponseHead.cpp | 1221 |
1 files changed, 1221 insertions, 0 deletions
diff --git a/netwerk/protocol/http/nsHttpResponseHead.cpp b/netwerk/protocol/http/nsHttpResponseHead.cpp new file mode 100644 index 000000000..6d384c488 --- /dev/null +++ b/netwerk/protocol/http/nsHttpResponseHead.cpp @@ -0,0 +1,1221 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* vim:set ts=4 sw=4 sts=4 et cin: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// HttpLog.h should generally be included first +#include "HttpLog.h" + +#include "nsHttpResponseHead.h" +#include "nsIHttpHeaderVisitor.h" +#include "nsPrintfCString.h" +#include "prtime.h" +#include "plstr.h" +#include "nsURLHelper.h" +#include <algorithm> + +namespace mozilla { +namespace net { + +//----------------------------------------------------------------------------- +// nsHttpResponseHead <public> +//----------------------------------------------------------------------------- + +nsHttpResponseHead::nsHttpResponseHead(const nsHttpResponseHead &aOther) + : mReentrantMonitor("nsHttpResponseHead.mReentrantMonitor") + , mInVisitHeaders(false) +{ + nsHttpResponseHead &other = const_cast<nsHttpResponseHead&>(aOther); + ReentrantMonitorAutoEnter monitor(other.mReentrantMonitor); + + mHeaders = other.mHeaders; + mVersion = other.mVersion; + mStatus = other.mStatus; + mStatusText = other.mStatusText; + mContentLength = other.mContentLength; + mContentType = other.mContentType; + mContentCharset = other.mContentCharset; + mCacheControlPrivate = other.mCacheControlPrivate; + mCacheControlNoStore = other.mCacheControlNoStore; + mCacheControlNoCache = other.mCacheControlNoCache; + mCacheControlImmutable = other.mCacheControlImmutable; + mPragmaNoCache = other.mPragmaNoCache; +} + +nsHttpResponseHead& +nsHttpResponseHead::operator=(const nsHttpResponseHead &aOther) +{ + nsHttpResponseHead &other = const_cast<nsHttpResponseHead&>(aOther); + ReentrantMonitorAutoEnter monitorOther(other.mReentrantMonitor); + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + + mHeaders = other.mHeaders; + mVersion = other.mVersion; + mStatus = other.mStatus; + mStatusText = other.mStatusText; + mContentLength = other.mContentLength; + mContentType = other.mContentType; + mContentCharset = other.mContentCharset; + mCacheControlPrivate = other.mCacheControlPrivate; + mCacheControlNoStore = other.mCacheControlNoStore; + mCacheControlNoCache = other.mCacheControlNoCache; + mCacheControlImmutable = other.mCacheControlImmutable; + mPragmaNoCache = other.mPragmaNoCache; + + return *this; +} + +nsHttpVersion +nsHttpResponseHead::Version() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return mVersion; +} + +uint16_t +nsHttpResponseHead::Status() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return mStatus; +} + +void +nsHttpResponseHead::StatusText(nsACString &aStatusText) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + aStatusText = mStatusText; +} + +int64_t +nsHttpResponseHead::ContentLength() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return mContentLength; +} + +void +nsHttpResponseHead::ContentType(nsACString &aContentType) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + aContentType = mContentType; +} + +void +nsHttpResponseHead::ContentCharset(nsACString &aContentCharset) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + aContentCharset = mContentCharset; +} + +bool +nsHttpResponseHead::Private() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return mCacheControlPrivate; +} + +bool +nsHttpResponseHead::NoStore() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return mCacheControlNoStore; +} + +bool +nsHttpResponseHead::NoCache() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return (mCacheControlNoCache || mPragmaNoCache); +} + +bool +nsHttpResponseHead::Immutable() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return mCacheControlImmutable; +} + +nsresult +nsHttpResponseHead::SetHeader(nsHttpAtom hdr, + const nsACString &val, + bool merge) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + + if (mInVisitHeaders) { + return NS_ERROR_FAILURE; + } + + return SetHeader_locked(hdr, val, merge); +} + +nsresult +nsHttpResponseHead::SetHeader_locked(nsHttpAtom hdr, + const nsACString &val, + bool merge) +{ + nsresult rv = mHeaders.SetHeader(hdr, val, merge, + nsHttpHeaderArray::eVarietyResponse); + if (NS_FAILED(rv)) return rv; + + // respond to changes in these headers. we need to reparse the entire + // header since the change may have merged in additional values. + if (hdr == nsHttp::Cache_Control) + ParseCacheControl(mHeaders.PeekHeader(hdr)); + else if (hdr == nsHttp::Pragma) + ParsePragma(mHeaders.PeekHeader(hdr)); + + return NS_OK; +} + +nsresult +nsHttpResponseHead::GetHeader(nsHttpAtom h, nsACString &v) +{ + v.Truncate(); + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return mHeaders.GetHeader(h, v); +} + +void +nsHttpResponseHead::ClearHeader(nsHttpAtom h) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + mHeaders.ClearHeader(h); +} + +void +nsHttpResponseHead::ClearHeaders() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + mHeaders.Clear(); +} + +bool +nsHttpResponseHead::HasHeaderValue(nsHttpAtom h, const char *v) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return mHeaders.HasHeaderValue(h, v); +} + +bool +nsHttpResponseHead::HasHeader(nsHttpAtom h) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return mHeaders.HasHeader(h); +} + +void +nsHttpResponseHead::SetContentType(const nsACString &s) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + mContentType = s; +} + +void +nsHttpResponseHead::SetContentCharset(const nsACString &s) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + mContentCharset = s; +} + +void +nsHttpResponseHead::SetContentLength(int64_t len) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + + mContentLength = len; + if (len < 0) + mHeaders.ClearHeader(nsHttp::Content_Length); + else + mHeaders.SetHeader(nsHttp::Content_Length, + nsPrintfCString("%lld", len), + false, + nsHttpHeaderArray::eVarietyResponse); +} + +void +nsHttpResponseHead::Flatten(nsACString &buf, bool pruneTransients) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + if (mVersion == NS_HTTP_VERSION_0_9) + return; + + buf.AppendLiteral("HTTP/"); + if (mVersion == NS_HTTP_VERSION_2_0) + buf.AppendLiteral("2.0 "); + else if (mVersion == NS_HTTP_VERSION_1_1) + buf.AppendLiteral("1.1 "); + else + buf.AppendLiteral("1.0 "); + + buf.Append(nsPrintfCString("%u", unsigned(mStatus)) + + NS_LITERAL_CSTRING(" ") + + mStatusText + + NS_LITERAL_CSTRING("\r\n")); + + + mHeaders.Flatten(buf, false, pruneTransients); +} + +void +nsHttpResponseHead::FlattenNetworkOriginalHeaders(nsACString &buf) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + if (mVersion == NS_HTTP_VERSION_0_9) { + return; + } + + mHeaders.FlattenOriginalHeader(buf); +} + +nsresult +nsHttpResponseHead::ParseCachedHead(const char *block) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + LOG(("nsHttpResponseHead::ParseCachedHead [this=%p]\n", this)); + + // this command works on a buffer as prepared by Flatten, as such it is + // not very forgiving ;-) + + char *p = PL_strstr(block, "\r\n"); + if (!p) + return NS_ERROR_UNEXPECTED; + + ParseStatusLine_locked(nsDependentCSubstring(block, p - block)); + + do { + block = p + 2; + + if (*block == 0) + break; + + p = PL_strstr(block, "\r\n"); + if (!p) + return NS_ERROR_UNEXPECTED; + + ParseHeaderLine_locked(nsDependentCSubstring(block, p - block), false); + + } while (1); + + return NS_OK; +} + +nsresult +nsHttpResponseHead::ParseCachedOriginalHeaders(char *block) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + LOG(("nsHttpResponseHead::ParseCachedOriginalHeader [this=%p]\n", this)); + + // this command works on a buffer as prepared by FlattenOriginalHeader, + // as such it is not very forgiving ;-) + + if (!block) { + return NS_ERROR_UNEXPECTED; + } + + char *p = block; + nsHttpAtom hdr = {0}; + nsAutoCString val; + nsresult rv; + + do { + block = p; + + if (*block == 0) + break; + + p = PL_strstr(block, "\r\n"); + if (!p) + return NS_ERROR_UNEXPECTED; + + *p = 0; + if (NS_FAILED(nsHttpHeaderArray::ParseHeaderLine( + nsDependentCString(block, p - block), &hdr, &val))) { + + return NS_OK; + } + + rv = mHeaders.SetResponseHeaderFromCache(hdr, + val, + nsHttpHeaderArray::eVarietyResponseNetOriginal); + + if (NS_FAILED(rv)) { + return rv; + } + + p = p + 2; + } while (1); + + return NS_OK; +} + +void +nsHttpResponseHead::AssignDefaultStatusText() +{ + LOG(("response status line needs default reason phrase\n")); + + // if a http response doesn't contain a reason phrase, put one in based + // on the status code. The reason phrase is totally meaningless so its + // ok to have a default catch all here - but this makes debuggers and addons + // a little saner to use if we don't map things to "404 OK" or other nonsense. + // In particular, HTTP/2 does not use reason phrases at all so they need to + // always be injected. + + switch (mStatus) { + // start with the most common + case 200: + mStatusText.AssignLiteral("OK"); + break; + case 404: + mStatusText.AssignLiteral("Not Found"); + break; + case 301: + mStatusText.AssignLiteral("Moved Permanently"); + break; + case 304: + mStatusText.AssignLiteral("Not Modified"); + break; + case 307: + mStatusText.AssignLiteral("Temporary Redirect"); + break; + case 500: + mStatusText.AssignLiteral("Internal Server Error"); + break; + + // also well known + case 100: + mStatusText.AssignLiteral("Continue"); + break; + case 101: + mStatusText.AssignLiteral("Switching Protocols"); + break; + case 201: + mStatusText.AssignLiteral("Created"); + break; + case 202: + mStatusText.AssignLiteral("Accepted"); + break; + case 203: + mStatusText.AssignLiteral("Non Authoritative"); + break; + case 204: + mStatusText.AssignLiteral("No Content"); + break; + case 205: + mStatusText.AssignLiteral("Reset Content"); + break; + case 206: + mStatusText.AssignLiteral("Partial Content"); + break; + case 207: + mStatusText.AssignLiteral("Multi-Status"); + break; + case 208: + mStatusText.AssignLiteral("Already Reported"); + break; + case 300: + mStatusText.AssignLiteral("Multiple Choices"); + break; + case 302: + mStatusText.AssignLiteral("Found"); + break; + case 303: + mStatusText.AssignLiteral("See Other"); + break; + case 305: + mStatusText.AssignLiteral("Use Proxy"); + break; + case 308: + mStatusText.AssignLiteral("Permanent Redirect"); + break; + case 400: + mStatusText.AssignLiteral("Bad Request"); + break; + case 401: + mStatusText.AssignLiteral("Unauthorized"); + break; + case 402: + mStatusText.AssignLiteral("Payment Required"); + break; + case 403: + mStatusText.AssignLiteral("Forbidden"); + break; + case 405: + mStatusText.AssignLiteral("Method Not Allowed"); + break; + case 406: + mStatusText.AssignLiteral("Not Acceptable"); + break; + case 407: + mStatusText.AssignLiteral("Proxy Authentication Required"); + break; + case 408: + mStatusText.AssignLiteral("Request Timeout"); + break; + case 409: + mStatusText.AssignLiteral("Conflict"); + break; + case 410: + mStatusText.AssignLiteral("Gone"); + break; + case 411: + mStatusText.AssignLiteral("Length Required"); + break; + case 412: + mStatusText.AssignLiteral("Precondition Failed"); + break; + case 413: + mStatusText.AssignLiteral("Request Entity Too Large"); + break; + case 414: + mStatusText.AssignLiteral("Request URI Too Long"); + break; + case 415: + mStatusText.AssignLiteral("Unsupported Media Type"); + break; + case 416: + mStatusText.AssignLiteral("Requested Range Not Satisfiable"); + break; + case 417: + mStatusText.AssignLiteral("Expectation Failed"); + break; + case 421: + mStatusText.AssignLiteral("Misdirected Request"); + break; + case 501: + mStatusText.AssignLiteral("Not Implemented"); + break; + case 502: + mStatusText.AssignLiteral("Bad Gateway"); + break; + case 503: + mStatusText.AssignLiteral("Service Unavailable"); + break; + case 504: + mStatusText.AssignLiteral("Gateway Timeout"); + break; + case 505: + mStatusText.AssignLiteral("HTTP Version Unsupported"); + break; + default: + mStatusText.AssignLiteral("No Reason Phrase"); + break; + } +} + +void +nsHttpResponseHead::ParseStatusLine(const nsACString &line) +{ + + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + ParseStatusLine_locked(line); +} + +void +nsHttpResponseHead::ParseStatusLine_locked(const nsACString &line) +{ + // + // Parse Status-Line:: HTTP-Version SP Status-Code SP Reason-Phrase CRLF + // + + const char *start = line.BeginReading(); + const char *end = line.EndReading(); + const char *p = start; + + // HTTP-Version + ParseVersion(start); + + int32_t index = line.FindChar(' '); + + if ((mVersion == NS_HTTP_VERSION_0_9) || (index == -1)) { + mStatus = 200; + AssignDefaultStatusText(); + } + else { + // Status-Code + p += index + 1; + mStatus = (uint16_t) atoi(p); + if (mStatus == 0) { + LOG(("mal-formed response status; assuming status = 200\n")); + mStatus = 200; + } + + // Reason-Phrase is whatever is remaining of the line + index = line.FindChar(' ', p - start); + if (index == -1) { + AssignDefaultStatusText(); + } + else { + p = start + index + 1; + mStatusText = nsDependentCSubstring(p, end - p); + } + } + + LOG(("Have status line [version=%u status=%u statusText=%s]\n", + unsigned(mVersion), unsigned(mStatus), mStatusText.get())); +} + +nsresult +nsHttpResponseHead::ParseHeaderLine(const nsACString &line) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return ParseHeaderLine_locked(line, true); +} + +nsresult +nsHttpResponseHead::ParseHeaderLine_locked(const nsACString &line, bool originalFromNetHeaders) +{ + nsHttpAtom hdr = {0}; + nsAutoCString val; + + if (NS_FAILED(nsHttpHeaderArray::ParseHeaderLine(line, &hdr, &val))) { + return NS_OK; + } + nsresult rv; + if (originalFromNetHeaders) { + rv = mHeaders.SetHeaderFromNet(hdr, + val, + true); + } else { + rv = mHeaders.SetResponseHeaderFromCache(hdr, + val, + nsHttpHeaderArray::eVarietyResponse); + } + if (NS_FAILED(rv)) { + return rv; + } + + // leading and trailing LWS has been removed from |val| + + // handle some special case headers... + if (hdr == nsHttp::Content_Length) { + int64_t len; + const char *ignored; + // permit only a single value here. + if (nsHttp::ParseInt64(val.get(), &ignored, &len)) { + mContentLength = len; + } + else { + // If this is a negative content length then just ignore it + LOG(("invalid content-length! %s\n", val.get())); + } + } + else if (hdr == nsHttp::Content_Type) { + LOG(("ParseContentType [type=%s]\n", val.get())); + bool dummy; + net_ParseContentType(val, + mContentType, mContentCharset, &dummy); + } + else if (hdr == nsHttp::Cache_Control) + ParseCacheControl(val.get()); + else if (hdr == nsHttp::Pragma) + ParsePragma(val.get()); + return NS_OK; +} + +// From section 13.2.3 of RFC2616, we compute the current age of a cached +// response as follows: +// +// currentAge = max(max(0, responseTime - dateValue), ageValue) +// + now - requestTime +// +// where responseTime == now +// +// This is typically a very small number. +// +nsresult +nsHttpResponseHead::ComputeCurrentAge(uint32_t now, + uint32_t requestTime, + uint32_t *result) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + uint32_t dateValue; + uint32_t ageValue; + + *result = 0; + + if (requestTime > now) { + // for calculation purposes lets not allow the request to happen in the future + requestTime = now; + } + + if (NS_FAILED(GetDateValue_locked(&dateValue))) { + LOG(("nsHttpResponseHead::ComputeCurrentAge [this=%p] " + "Date response header not set!\n", this)); + // Assume we have a fast connection and that our clock + // is in sync with the server. + dateValue = now; + } + + // Compute apparent age + if (now > dateValue) + *result = now - dateValue; + + // Compute corrected received age + if (NS_SUCCEEDED(GetAgeValue_locked(&ageValue))) + *result = std::max(*result, ageValue); + + // Compute current age + *result += (now - requestTime); + return NS_OK; +} + +// From section 13.2.4 of RFC2616, we compute the freshness lifetime of a cached +// response as follows: +// +// freshnessLifetime = max_age_value +// <or> +// freshnessLifetime = expires_value - date_value +// <or> +// freshnessLifetime = min(one-week,(date_value - last_modified_value) * 0.10) +// <or> +// freshnessLifetime = 0 +// +nsresult +nsHttpResponseHead::ComputeFreshnessLifetime(uint32_t *result) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + *result = 0; + + // Try HTTP/1.1 style max-age directive... + if (NS_SUCCEEDED(GetMaxAgeValue_locked(result))) + return NS_OK; + + *result = 0; + + uint32_t date = 0, date2 = 0; + if (NS_FAILED(GetDateValue_locked(&date))) + date = NowInSeconds(); // synthesize a date header if none exists + + // Try HTTP/1.0 style expires header... + if (NS_SUCCEEDED(GetExpiresValue_locked(&date2))) { + if (date2 > date) + *result = date2 - date; + // the Expires header can specify a date in the past. + return NS_OK; + } + + // These responses can be cached indefinitely. + if ((mStatus == 300) || (mStatus == 410) || nsHttp::IsPermanentRedirect(mStatus)) { + LOG(("nsHttpResponseHead::ComputeFreshnessLifetime [this = %p] " + "Assign an infinite heuristic lifetime\n", this)); + *result = uint32_t(-1); + return NS_OK; + } + + if (mStatus >= 400) { + LOG(("nsHttpResponseHead::ComputeFreshnessLifetime [this = %p] " + "Do not calculate heuristic max-age for most responses >= 400\n", this)); + return NS_OK; + } + + // Fallback on heuristic using last modified header... + if (NS_SUCCEEDED(GetLastModifiedValue_locked(&date2))) { + LOG(("using last-modified to determine freshness-lifetime\n")); + LOG(("last-modified = %u, date = %u\n", date2, date)); + if (date2 <= date) { + // this only makes sense if last-modified is actually in the past + *result = (date - date2) / 10; + const uint32_t kOneWeek = 60 * 60 * 24 * 7; + *result = std::min(kOneWeek, *result); + return NS_OK; + } + } + + LOG(("nsHttpResponseHead::ComputeFreshnessLifetime [this = %p] " + "Insufficient information to compute a non-zero freshness " + "lifetime!\n", this)); + + return NS_OK; +} + +bool +nsHttpResponseHead::MustValidate() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + LOG(("nsHttpResponseHead::MustValidate ??\n")); + + // Some response codes are cacheable, but the rest are not. This switch + // should stay in sync with the list in nsHttpChannel::ProcessResponse + switch (mStatus) { + // Success codes + case 200: + case 203: + case 206: + // Cacheable redirects + case 300: + case 301: + case 302: + case 304: + case 307: + case 308: + // Gone forever + case 410: + break; + // Uncacheable redirects + case 303: + case 305: + // Other known errors + case 401: + case 407: + case 412: + case 416: + default: // revalidate unknown error pages + LOG(("Must validate since response is an uncacheable error page\n")); + return true; + } + + // The no-cache response header indicates that we must validate this + // cached response before reusing. + if (mCacheControlNoCache || mPragmaNoCache) { + LOG(("Must validate since response contains 'no-cache' header\n")); + return true; + } + + // Likewise, if the response is no-store, then we must validate this + // cached response before reusing. NOTE: it may seem odd that a no-store + // response may be cached, but indeed all responses are cached in order + // to support File->SaveAs, View->PageSource, and other browser features. + if (mCacheControlNoStore) { + LOG(("Must validate since response contains 'no-store' header\n")); + return true; + } + + // Compare the Expires header to the Date header. If the server sent an + // Expires header with a timestamp in the past, then we must validate this + // cached response before reusing. + if (ExpiresInPast_locked()) { + LOG(("Must validate since Expires < Date\n")); + return true; + } + + LOG(("no mandatory validation requirement\n")); + return false; +} + +bool +nsHttpResponseHead::MustValidateIfExpired() +{ + // according to RFC2616, section 14.9.4: + // + // When the must-revalidate directive is present in a response received by a + // cache, that cache MUST NOT use the entry after it becomes stale to respond to + // a subsequent request without first revalidating it with the origin server. + // + return HasHeaderValue(nsHttp::Cache_Control, "must-revalidate"); +} + +bool +nsHttpResponseHead::IsResumable() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + // even though some HTTP/1.0 servers may support byte range requests, we're not + // going to bother with them, since those servers wouldn't understand If-Range. + // Also, while in theory it may be possible to resume when the status code + // is not 200, it is unlikely to be worth the trouble, especially for + // non-2xx responses. + return mStatus == 200 && + mVersion >= NS_HTTP_VERSION_1_1 && + mHeaders.PeekHeader(nsHttp::Content_Length) && + (mHeaders.PeekHeader(nsHttp::ETag) || + mHeaders.PeekHeader(nsHttp::Last_Modified)) && + mHeaders.HasHeaderValue(nsHttp::Accept_Ranges, "bytes"); +} + +bool +nsHttpResponseHead::ExpiresInPast() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return ExpiresInPast_locked(); +} + +bool +nsHttpResponseHead::ExpiresInPast_locked() const +{ + uint32_t maxAgeVal, expiresVal, dateVal; + + // Bug #203271. Ensure max-age directive takes precedence over Expires + if (NS_SUCCEEDED(GetMaxAgeValue_locked(&maxAgeVal))) { + return false; + } + + return NS_SUCCEEDED(GetExpiresValue_locked(&expiresVal)) && + NS_SUCCEEDED(GetDateValue_locked(&dateVal)) && + expiresVal < dateVal; +} + +nsresult +nsHttpResponseHead::UpdateHeaders(nsHttpResponseHead *aOther) +{ + LOG(("nsHttpResponseHead::UpdateHeaders [this=%p]\n", this)); + + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + ReentrantMonitorAutoEnter monitorOther(aOther->mReentrantMonitor); + + uint32_t i, count = aOther->mHeaders.Count(); + for (i=0; i<count; ++i) { + nsHttpAtom header; + const char *val = aOther->mHeaders.PeekHeaderAt(i, header); + + if (!val) { + continue; + } + + // Ignore any hop-by-hop headers... + if (header == nsHttp::Connection || + header == nsHttp::Proxy_Connection || + header == nsHttp::Keep_Alive || + header == nsHttp::Proxy_Authenticate || + header == nsHttp::Proxy_Authorization || // not a response header! + header == nsHttp::TE || + header == nsHttp::Trailer || + header == nsHttp::Transfer_Encoding || + header == nsHttp::Upgrade || + // Ignore any non-modifiable headers... + header == nsHttp::Content_Location || + header == nsHttp::Content_MD5 || + header == nsHttp::ETag || + // Assume Cache-Control: "no-transform" + header == nsHttp::Content_Encoding || + header == nsHttp::Content_Range || + header == nsHttp::Content_Type || + // Ignore wacky headers too... + // this one is for MS servers that send "Content-Length: 0" + // on 304 responses + header == nsHttp::Content_Length) { + LOG(("ignoring response header [%s: %s]\n", header.get(), val)); + } + else { + LOG(("new response header [%s: %s]\n", header.get(), val)); + + // overwrite the current header value with the new value... + SetHeader_locked(header, nsDependentCString(val)); + } + } + + return NS_OK; +} + +void +nsHttpResponseHead::Reset() +{ + LOG(("nsHttpResponseHead::Reset\n")); + + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + + mHeaders.Clear(); + + mVersion = NS_HTTP_VERSION_1_1; + mStatus = 200; + mContentLength = -1; + mCacheControlPrivate = false; + mCacheControlNoStore = false; + mCacheControlNoCache = false; + mCacheControlImmutable = false; + mPragmaNoCache = false; + mStatusText.Truncate(); + mContentType.Truncate(); + mContentCharset.Truncate(); +} + +nsresult +nsHttpResponseHead::ParseDateHeader(nsHttpAtom header, uint32_t *result) const +{ + const char *val = mHeaders.PeekHeader(header); + if (!val) + return NS_ERROR_NOT_AVAILABLE; + + PRTime time; + PRStatus st = PR_ParseTimeString(val, true, &time); + if (st != PR_SUCCESS) + return NS_ERROR_NOT_AVAILABLE; + + *result = PRTimeToSeconds(time); + return NS_OK; +} + +nsresult +nsHttpResponseHead::GetAgeValue(uint32_t *result) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return GetAgeValue_locked(result); +} + +nsresult +nsHttpResponseHead::GetAgeValue_locked(uint32_t *result) const +{ + const char *val = mHeaders.PeekHeader(nsHttp::Age); + if (!val) + return NS_ERROR_NOT_AVAILABLE; + + *result = (uint32_t) atoi(val); + return NS_OK; +} + +// Return the value of the (HTTP 1.1) max-age directive, which itself is a +// component of the Cache-Control response header +nsresult +nsHttpResponseHead::GetMaxAgeValue(uint32_t *result) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return GetMaxAgeValue_locked(result); +} + +nsresult +nsHttpResponseHead::GetMaxAgeValue_locked(uint32_t *result) const +{ + const char *val = mHeaders.PeekHeader(nsHttp::Cache_Control); + if (!val) + return NS_ERROR_NOT_AVAILABLE; + + const char *p = nsHttp::FindToken(val, "max-age", HTTP_HEADER_VALUE_SEPS "="); + if (!p) + return NS_ERROR_NOT_AVAILABLE; + p += 7; + while (*p == ' ' || *p == '\t') + ++p; + if (*p != '=') + return NS_ERROR_NOT_AVAILABLE; + ++p; + while (*p == ' ' || *p == '\t') + ++p; + + int maxAgeValue = atoi(p); + if (maxAgeValue < 0) + maxAgeValue = 0; + *result = static_cast<uint32_t>(maxAgeValue); + return NS_OK; +} + +nsresult +nsHttpResponseHead::GetDateValue(uint32_t *result) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return GetDateValue_locked(result); +} + +nsresult +nsHttpResponseHead::GetExpiresValue(uint32_t *result) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return GetExpiresValue_locked(result); +} + +nsresult +nsHttpResponseHead::GetExpiresValue_locked(uint32_t *result) const +{ + const char *val = mHeaders.PeekHeader(nsHttp::Expires); + if (!val) + return NS_ERROR_NOT_AVAILABLE; + + PRTime time; + PRStatus st = PR_ParseTimeString(val, true, &time); + if (st != PR_SUCCESS) { + // parsing failed... RFC 2616 section 14.21 says we should treat this + // as an expiration time in the past. + *result = 0; + return NS_OK; + } + + if (time < 0) + *result = 0; + else + *result = PRTimeToSeconds(time); + return NS_OK; +} + +nsresult +nsHttpResponseHead::GetLastModifiedValue(uint32_t *result) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return ParseDateHeader(nsHttp::Last_Modified, result); +} + +bool +nsHttpResponseHead::operator==(const nsHttpResponseHead& aOther) const +{ + nsHttpResponseHead &curr = const_cast<nsHttpResponseHead&>(*this); + nsHttpResponseHead &other = const_cast<nsHttpResponseHead&>(aOther); + ReentrantMonitorAutoEnter monitorOther(other.mReentrantMonitor); + ReentrantMonitorAutoEnter monitor(curr.mReentrantMonitor); + + return mHeaders == aOther.mHeaders && + mVersion == aOther.mVersion && + mStatus == aOther.mStatus && + mStatusText == aOther.mStatusText && + mContentLength == aOther.mContentLength && + mContentType == aOther.mContentType && + mContentCharset == aOther.mContentCharset && + mCacheControlPrivate == aOther.mCacheControlPrivate && + mCacheControlNoCache == aOther.mCacheControlNoCache && + mCacheControlNoStore == aOther.mCacheControlNoStore && + mCacheControlImmutable == aOther.mCacheControlImmutable && + mPragmaNoCache == aOther.mPragmaNoCache; +} + +int64_t +nsHttpResponseHead::TotalEntitySize() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + const char* contentRange = mHeaders.PeekHeader(nsHttp::Content_Range); + if (!contentRange) + return mContentLength; + + // Total length is after a slash + const char* slash = strrchr(contentRange, '/'); + if (!slash) + return -1; // No idea what the length is + + slash++; + if (*slash == '*') // Server doesn't know the length + return -1; + + int64_t size; + if (!nsHttp::ParseInt64(slash, &size)) + size = UINT64_MAX; + return size; +} + +//----------------------------------------------------------------------------- +// nsHttpResponseHead <private> +//----------------------------------------------------------------------------- + +void +nsHttpResponseHead::ParseVersion(const char *str) +{ + // Parse HTTP-Version:: "HTTP" "/" 1*DIGIT "." 1*DIGIT + + LOG(("nsHttpResponseHead::ParseVersion [version=%s]\n", str)); + + // make sure we have HTTP at the beginning + if (PL_strncasecmp(str, "HTTP", 4) != 0) { + if (PL_strncasecmp(str, "ICY ", 4) == 0) { + // ShoutCast ICY is HTTP/1.0-like. Assume it is HTTP/1.0. + LOG(("Treating ICY as HTTP 1.0\n")); + mVersion = NS_HTTP_VERSION_1_0; + return; + } + LOG(("looks like a HTTP/0.9 response\n")); + mVersion = NS_HTTP_VERSION_0_9; + return; + } + str += 4; + + if (*str != '/') { + LOG(("server did not send a version number; assuming HTTP/1.0\n")); + // NCSA/1.5.2 has a bug in which it fails to send a version number + // if the request version is HTTP/1.1, so we fall back on HTTP/1.0 + mVersion = NS_HTTP_VERSION_1_0; + return; + } + + char *p = PL_strchr(str, '.'); + if (p == nullptr) { + LOG(("mal-formed server version; assuming HTTP/1.0\n")); + mVersion = NS_HTTP_VERSION_1_0; + return; + } + + ++p; // let b point to the minor version + + int major = atoi(str + 1); + int minor = atoi(p); + + if ((major > 2) || ((major == 2) && (minor >= 0))) + mVersion = NS_HTTP_VERSION_2_0; + else if ((major == 1) && (minor >= 1)) + // at least HTTP/1.1 + mVersion = NS_HTTP_VERSION_1_1; + else + // treat anything else as version 1.0 + mVersion = NS_HTTP_VERSION_1_0; +} + +void +nsHttpResponseHead::ParseCacheControl(const char *val) +{ + if (!(val && *val)) { + // clear flags + mCacheControlPrivate = false; + mCacheControlNoCache = false; + mCacheControlNoStore = false; + mCacheControlImmutable = false; + return; + } + + // search header value for occurrence of "private" + if (nsHttp::FindToken(val, "private", HTTP_HEADER_VALUE_SEPS)) + mCacheControlPrivate = true; + + // search header value for occurrence(s) of "no-cache" but ignore + // occurrence(s) of "no-cache=blah" + if (nsHttp::FindToken(val, "no-cache", HTTP_HEADER_VALUE_SEPS)) + mCacheControlNoCache = true; + + // search header value for occurrence of "no-store" + if (nsHttp::FindToken(val, "no-store", HTTP_HEADER_VALUE_SEPS)) + mCacheControlNoStore = true; + + // search header value for occurrence of "immutable" + if (nsHttp::FindToken(val, "immutable", HTTP_HEADER_VALUE_SEPS)) { + mCacheControlImmutable = true; + } +} + +void +nsHttpResponseHead::ParsePragma(const char *val) +{ + LOG(("nsHttpResponseHead::ParsePragma [val=%s]\n", val)); + + if (!(val && *val)) { + // clear no-cache flag + mPragmaNoCache = false; + return; + } + + // Although 'Pragma: no-cache' is not a standard HTTP response header (it's + // a request header), caching is inhibited when this header is present so + // as to match existing Navigator behavior. + if (nsHttp::FindToken(val, "no-cache", HTTP_HEADER_VALUE_SEPS)) + mPragmaNoCache = true; +} + +nsresult +nsHttpResponseHead::VisitHeaders(nsIHttpHeaderVisitor *visitor, + nsHttpHeaderArray::VisitorFilter filter) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + mInVisitHeaders = true; + nsresult rv = mHeaders.VisitHeaders(visitor, filter); + mInVisitHeaders = false; + return rv; +} + +nsresult +nsHttpResponseHead::GetOriginalHeader(nsHttpAtom aHeader, + nsIHttpHeaderVisitor *aVisitor) +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + mInVisitHeaders = true; + nsresult rv = mHeaders.GetOriginalHeader(aHeader, aVisitor); + mInVisitHeaders = false; + return rv; +} + +bool +nsHttpResponseHead::HasContentType() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return !mContentType.IsEmpty(); +} + +bool +nsHttpResponseHead::HasContentCharset() +{ + ReentrantMonitorAutoEnter monitor(mReentrantMonitor); + return !mContentCharset.IsEmpty(); +} + +} // namespace net +} // namespace mozilla |