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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // The rules for header parsing were borrowed from Firefox: | 5 // The rules for header parsing were borrowed from Firefox: |
6 // http://lxr.mozilla.org/seamonkey/source/netwerk/protocol/http/src/nsHttpRespo
nseHead.cpp | 6 // http://lxr.mozilla.org/seamonkey/source/netwerk/protocol/http/src/nsHttpRespo
nseHead.cpp |
7 // The rules for parsing content-types were also borrowed from Firefox: | 7 // The rules for parsing content-types were also borrowed from Firefox: |
8 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834 | 8 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834 |
9 | 9 |
10 #include "net/http/http_response_headers.h" | 10 #include "net/http/http_response_headers.h" |
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91 // this list: | 91 // this list: |
92 const char* const kNonUpdatedHeaderPrefixes[] = { | 92 const char* const kNonUpdatedHeaderPrefixes[] = { |
93 "content-", | 93 "content-", |
94 "x-content-", | 94 "x-content-", |
95 "x-webkit-" | 95 "x-webkit-" |
96 }; | 96 }; |
97 | 97 |
98 bool ShouldUpdateHeader(const std::string::const_iterator& name_begin, | 98 bool ShouldUpdateHeader(const std::string::const_iterator& name_begin, |
99 const std::string::const_iterator& name_end) { | 99 const std::string::const_iterator& name_end) { |
100 for (size_t i = 0; i < arraysize(kNonUpdatedHeaders); ++i) { | 100 for (size_t i = 0; i < arraysize(kNonUpdatedHeaders); ++i) { |
101 if (base::LowerCaseEqualsASCII(name_begin, name_end, | 101 if (LowerCaseEqualsASCII(name_begin, name_end, kNonUpdatedHeaders[i])) |
102 kNonUpdatedHeaders[i])) | |
103 return false; | 102 return false; |
104 } | 103 } |
105 for (size_t i = 0; i < arraysize(kNonUpdatedHeaderPrefixes); ++i) { | 104 for (size_t i = 0; i < arraysize(kNonUpdatedHeaderPrefixes); ++i) { |
106 if (StartsWithASCII(std::string(name_begin, name_end), | 105 if (StartsWithASCII(std::string(name_begin, name_end), |
107 kNonUpdatedHeaderPrefixes[i], false)) | 106 kNonUpdatedHeaderPrefixes[i], false)) |
108 return false; | 107 return false; |
109 } | 108 } |
110 return true; | 109 return true; |
111 } | 110 } |
112 | 111 |
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626 // static | 625 // static |
627 HttpVersion HttpResponseHeaders::ParseVersion( | 626 HttpVersion HttpResponseHeaders::ParseVersion( |
628 std::string::const_iterator line_begin, | 627 std::string::const_iterator line_begin, |
629 std::string::const_iterator line_end) { | 628 std::string::const_iterator line_end) { |
630 std::string::const_iterator p = line_begin; | 629 std::string::const_iterator p = line_begin; |
631 | 630 |
632 // RFC2616 sec 3.1: HTTP-Version = "HTTP" "/" 1*DIGIT "." 1*DIGIT | 631 // RFC2616 sec 3.1: HTTP-Version = "HTTP" "/" 1*DIGIT "." 1*DIGIT |
633 // TODO: (1*DIGIT apparently means one or more digits, but we only handle 1). | 632 // TODO: (1*DIGIT apparently means one or more digits, but we only handle 1). |
634 // TODO: handle leading zeros, which is allowed by the rfc1616 sec 3.1. | 633 // TODO: handle leading zeros, which is allowed by the rfc1616 sec 3.1. |
635 | 634 |
636 if ((line_end - p < 4) || !base::LowerCaseEqualsASCII(p, p + 4, "http")) { | 635 if ((line_end - p < 4) || !LowerCaseEqualsASCII(p, p + 4, "http")) { |
637 DVLOG(1) << "missing status line"; | 636 DVLOG(1) << "missing status line"; |
638 return HttpVersion(); | 637 return HttpVersion(); |
639 } | 638 } |
640 | 639 |
641 p += 4; | 640 p += 4; |
642 | 641 |
643 if (p >= line_end || *p != '/') { | 642 if (p >= line_end || *p != '/') { |
644 DVLOG(1) << "missing version"; | 643 DVLOG(1) << "missing version"; |
645 return HttpVersion(); | 644 return HttpVersion(); |
646 } | 645 } |
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757 bool HttpResponseHeaders::GetCacheControlDirective(const StringPiece& directive, | 756 bool HttpResponseHeaders::GetCacheControlDirective(const StringPiece& directive, |
758 TimeDelta* result) const { | 757 TimeDelta* result) const { |
759 StringPiece name("cache-control"); | 758 StringPiece name("cache-control"); |
760 std::string value; | 759 std::string value; |
761 | 760 |
762 size_t directive_size = directive.size(); | 761 size_t directive_size = directive.size(); |
763 | 762 |
764 void* iter = NULL; | 763 void* iter = NULL; |
765 while (EnumerateHeader(&iter, name, &value)) { | 764 while (EnumerateHeader(&iter, name, &value)) { |
766 if (value.size() > directive_size + 1 && | 765 if (value.size() > directive_size + 1 && |
767 base::LowerCaseEqualsASCII(value.begin(), | 766 LowerCaseEqualsASCII(value.begin(), |
768 value.begin() + directive_size, | 767 value.begin() + directive_size, |
769 directive.begin()) && | 768 directive.begin()) && |
770 value[directive_size] == '=') { | 769 value[directive_size] == '=') { |
771 int64 seconds; | 770 int64 seconds; |
772 base::StringToInt64( | 771 base::StringToInt64( |
773 StringPiece(value.begin() + directive_size + 1, value.end()), | 772 StringPiece(value.begin() + directive_size + 1, value.end()), |
774 &seconds); | 773 &seconds); |
775 *result = TimeDelta::FromSeconds(seconds); | 774 *result = TimeDelta::FromSeconds(seconds); |
776 return true; | 775 return true; |
777 } | 776 } |
778 } | 777 } |
779 | 778 |
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1178 // meaningful when we don't know that this response was from a proxy, but | 1177 // meaningful when we don't know that this response was from a proxy, but |
1179 // Mozilla also does this, so we'll do the same. | 1178 // Mozilla also does this, so we'll do the same. |
1180 std::string connection_val; | 1179 std::string connection_val; |
1181 if (!EnumerateHeader(NULL, "connection", &connection_val)) | 1180 if (!EnumerateHeader(NULL, "connection", &connection_val)) |
1182 EnumerateHeader(NULL, "proxy-connection", &connection_val); | 1181 EnumerateHeader(NULL, "proxy-connection", &connection_val); |
1183 | 1182 |
1184 bool keep_alive; | 1183 bool keep_alive; |
1185 | 1184 |
1186 if (http_version_ == HttpVersion(1, 0)) { | 1185 if (http_version_ == HttpVersion(1, 0)) { |
1187 // HTTP/1.0 responses default to NOT keep-alive | 1186 // HTTP/1.0 responses default to NOT keep-alive |
1188 keep_alive = base::LowerCaseEqualsASCII(connection_val, "keep-alive"); | 1187 keep_alive = LowerCaseEqualsASCII(connection_val, "keep-alive"); |
1189 } else { | 1188 } else { |
1190 // HTTP/1.1 responses default to keep-alive | 1189 // HTTP/1.1 responses default to keep-alive |
1191 keep_alive = !base::LowerCaseEqualsASCII(connection_val, "close"); | 1190 keep_alive = !LowerCaseEqualsASCII(connection_val, "close"); |
1192 } | 1191 } |
1193 | 1192 |
1194 return keep_alive; | 1193 return keep_alive; |
1195 } | 1194 } |
1196 | 1195 |
1197 bool HttpResponseHeaders::HasStrongValidators() const { | 1196 bool HttpResponseHeaders::HasStrongValidators() const { |
1198 std::string etag_header; | 1197 std::string etag_header; |
1199 EnumerateHeader(NULL, "etag", &etag_header); | 1198 EnumerateHeader(NULL, "etag", &etag_header); |
1200 std::string last_modified_header; | 1199 std::string last_modified_header; |
1201 EnumerateHeader(NULL, "Last-Modified", &last_modified_header); | 1200 EnumerateHeader(NULL, "Last-Modified", &last_modified_header); |
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1256 size_t space_position = content_range_spec.find(' '); | 1255 size_t space_position = content_range_spec.find(' '); |
1257 if (space_position == std::string::npos) | 1256 if (space_position == std::string::npos) |
1258 return false; | 1257 return false; |
1259 | 1258 |
1260 // Invalid header if it doesn't contain "bytes-unit". | 1259 // Invalid header if it doesn't contain "bytes-unit". |
1261 std::string::const_iterator content_range_spec_begin = | 1260 std::string::const_iterator content_range_spec_begin = |
1262 content_range_spec.begin(); | 1261 content_range_spec.begin(); |
1263 std::string::const_iterator content_range_spec_end = | 1262 std::string::const_iterator content_range_spec_end = |
1264 content_range_spec.begin() + space_position; | 1263 content_range_spec.begin() + space_position; |
1265 HttpUtil::TrimLWS(&content_range_spec_begin, &content_range_spec_end); | 1264 HttpUtil::TrimLWS(&content_range_spec_begin, &content_range_spec_end); |
1266 if (!base::LowerCaseEqualsASCII(content_range_spec_begin, | 1265 if (!LowerCaseEqualsASCII(content_range_spec_begin, |
1267 content_range_spec_end, | 1266 content_range_spec_end, |
1268 "bytes")) { | 1267 "bytes")) { |
1269 return false; | 1268 return false; |
1270 } | 1269 } |
1271 | 1270 |
1272 size_t slash_position = content_range_spec.find('/', space_position + 1); | 1271 size_t slash_position = content_range_spec.find('/', space_position + 1); |
1273 if (slash_position == std::string::npos) | 1272 if (slash_position == std::string::npos) |
1274 return false; | 1273 return false; |
1275 | 1274 |
1276 // Obtain the part behind the space and before slash. | 1275 // Obtain the part behind the space and before slash. |
1277 std::string::const_iterator byte_range_resp_spec_begin = | 1276 std::string::const_iterator byte_range_resp_spec_begin = |
1278 content_range_spec.begin() + space_position + 1; | 1277 content_range_spec.begin() + space_position + 1; |
1279 std::string::const_iterator byte_range_resp_spec_end = | 1278 std::string::const_iterator byte_range_resp_spec_end = |
1280 content_range_spec.begin() + slash_position; | 1279 content_range_spec.begin() + slash_position; |
1281 HttpUtil::TrimLWS(&byte_range_resp_spec_begin, &byte_range_resp_spec_end); | 1280 HttpUtil::TrimLWS(&byte_range_resp_spec_begin, &byte_range_resp_spec_end); |
1282 | 1281 |
1283 // Parse the byte-range-resp-spec part. | 1282 // Parse the byte-range-resp-spec part. |
1284 std::string byte_range_resp_spec(byte_range_resp_spec_begin, | 1283 std::string byte_range_resp_spec(byte_range_resp_spec_begin, |
1285 byte_range_resp_spec_end); | 1284 byte_range_resp_spec_end); |
1286 // If byte-range-resp-spec != "*". | 1285 // If byte-range-resp-spec != "*". |
1287 if (!base::LowerCaseEqualsASCII(byte_range_resp_spec, "*")) { | 1286 if (!LowerCaseEqualsASCII(byte_range_resp_spec, "*")) { |
1288 size_t minus_position = byte_range_resp_spec.find('-'); | 1287 size_t minus_position = byte_range_resp_spec.find('-'); |
1289 if (minus_position != std::string::npos) { | 1288 if (minus_position != std::string::npos) { |
1290 // Obtain first-byte-pos. | 1289 // Obtain first-byte-pos. |
1291 std::string::const_iterator first_byte_pos_begin = | 1290 std::string::const_iterator first_byte_pos_begin = |
1292 byte_range_resp_spec.begin(); | 1291 byte_range_resp_spec.begin(); |
1293 std::string::const_iterator first_byte_pos_end = | 1292 std::string::const_iterator first_byte_pos_end = |
1294 byte_range_resp_spec.begin() + minus_position; | 1293 byte_range_resp_spec.begin() + minus_position; |
1295 HttpUtil::TrimLWS(&first_byte_pos_begin, &first_byte_pos_end); | 1294 HttpUtil::TrimLWS(&first_byte_pos_begin, &first_byte_pos_end); |
1296 | 1295 |
1297 bool ok = base::StringToInt64(StringPiece(first_byte_pos_begin, | 1296 bool ok = base::StringToInt64(StringPiece(first_byte_pos_begin, |
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1321 } | 1320 } |
1322 | 1321 |
1323 // Parse the instance-length part. | 1322 // Parse the instance-length part. |
1324 // If instance-length == "*". | 1323 // If instance-length == "*". |
1325 std::string::const_iterator instance_length_begin = | 1324 std::string::const_iterator instance_length_begin = |
1326 content_range_spec.begin() + slash_position + 1; | 1325 content_range_spec.begin() + slash_position + 1; |
1327 std::string::const_iterator instance_length_end = | 1326 std::string::const_iterator instance_length_end = |
1328 content_range_spec.end(); | 1327 content_range_spec.end(); |
1329 HttpUtil::TrimLWS(&instance_length_begin, &instance_length_end); | 1328 HttpUtil::TrimLWS(&instance_length_begin, &instance_length_end); |
1330 | 1329 |
1331 if (base::LowerCaseEqualsASCII(instance_length_begin, instance_length_end, | 1330 if (LowerCaseEqualsASCII(instance_length_begin, instance_length_end, "*")) { |
1332 "*")) { | |
1333 return false; | 1331 return false; |
1334 } else if (!base::StringToInt64(StringPiece(instance_length_begin, | 1332 } else if (!base::StringToInt64(StringPiece(instance_length_begin, |
1335 instance_length_end), | 1333 instance_length_end), |
1336 instance_length)) { | 1334 instance_length)) { |
1337 *instance_length = -1; | 1335 *instance_length = -1; |
1338 return false; | 1336 return false; |
1339 } | 1337 } |
1340 | 1338 |
1341 // We have all the values; let's verify that they make sense for a 206 | 1339 // We have all the values; let's verify that they make sense for a 206 |
1342 // response. | 1340 // response. |
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1399 return true; | 1397 return true; |
1400 } | 1398 } |
1401 | 1399 |
1402 bool HttpResponseHeaders::IsChunkEncoded() const { | 1400 bool HttpResponseHeaders::IsChunkEncoded() const { |
1403 // Ignore spurious chunked responses from HTTP/1.0 servers and proxies. | 1401 // Ignore spurious chunked responses from HTTP/1.0 servers and proxies. |
1404 return GetHttpVersion() >= HttpVersion(1, 1) && | 1402 return GetHttpVersion() >= HttpVersion(1, 1) && |
1405 HasHeaderValue("Transfer-Encoding", "chunked"); | 1403 HasHeaderValue("Transfer-Encoding", "chunked"); |
1406 } | 1404 } |
1407 | 1405 |
1408 } // namespace net | 1406 } // namespace net |
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