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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "content/renderer/media/cache_util.h" | |
| 6 | |
| 7 #include <string> | |
| 8 | |
| 9 #include "base/strings/string_number_conversions.h" | |
| 10 #include "base/strings/string_util.h" | |
| 11 #include "base/time/time.h" | |
| 12 #include "net/http/http_util.h" | |
| 13 #include "net/http/http_version.h" | |
| 14 #include "third_party/WebKit/public/platform/WebCString.h" | |
| 15 #include "third_party/WebKit/public/platform/WebString.h" | |
| 16 #include "third_party/WebKit/public/platform/WebURLResponse.h" | |
| 17 | |
| 18 using base::Time; | |
| 19 using base::TimeDelta; | |
| 20 using net::HttpVersion; | |
| 21 using blink::WebURLResponse; | |
| 22 | |
| 23 namespace content { | |
| 24 | |
| 25 enum { kHttpOK = 200, kHttpPartialContent = 206 }; | |
| 26 | |
| 27 uint32 GetReasonsForUncacheability(const WebURLResponse& response) { | |
| 28 uint32 reasons = 0; | |
| 29 const int code = response.httpStatusCode(); | |
| 30 const int version = response.httpVersion(); | |
| 31 const HttpVersion http_version = | |
| 32 version == WebURLResponse::HTTP_1_1 ? HttpVersion(1, 1) : | |
| 33 version == WebURLResponse::HTTP_1_0 ? HttpVersion(1, 0) : | |
| 34 version == WebURLResponse::HTTP_0_9 ? HttpVersion(0, 9) : | |
| 35 HttpVersion(); | |
| 36 if (code != kHttpOK && code != kHttpPartialContent) | |
| 37 reasons |= kNoData; | |
| 38 if (http_version < HttpVersion(1, 1) && code == kHttpPartialContent) | |
| 39 reasons |= kPre11PartialResponse; | |
| 40 if (code == kHttpPartialContent && | |
| 41 !net::HttpUtil::HasStrongValidators( | |
| 42 http_version, | |
| 43 response.httpHeaderField("etag").utf8(), | |
| 44 response.httpHeaderField("Last-Modified").utf8(), | |
| 45 response.httpHeaderField("Date").utf8())) { | |
| 46 reasons |= kNoStrongValidatorOnPartialResponse; | |
| 47 } | |
| 48 | |
| 49 std::string cache_control_header = | |
| 50 response.httpHeaderField("cache-control").utf8(); | |
| 51 base::StringToLowerASCII(&cache_control_header); | |
| 52 if (cache_control_header.find("no-cache") != std::string::npos) | |
| 53 reasons |= kNoCache; | |
| 54 if (cache_control_header.find("no-store") != std::string::npos) | |
| 55 reasons |= kNoStore; | |
| 56 if (cache_control_header.find("must-revalidate") != std::string::npos) | |
| 57 reasons |= kHasMustRevalidate; | |
| 58 | |
| 59 const TimeDelta kMinimumAgeForUsefulness = | |
| 60 TimeDelta::FromSeconds(3600); // Arbitrary value. | |
| 61 | |
| 62 const char kMaxAgePrefix[] = "max-age="; | |
| 63 const size_t kMaxAgePrefixLen = arraysize(kMaxAgePrefix) - 1; | |
| 64 if (cache_control_header.substr(0, kMaxAgePrefixLen) == kMaxAgePrefix) { | |
| 65 int64 max_age_seconds; | |
| 66 base::StringToInt64( | |
| 67 base::StringPiece(cache_control_header.begin() + kMaxAgePrefixLen, | |
| 68 cache_control_header.end()), | |
| 69 &max_age_seconds); | |
| 70 if (TimeDelta::FromSeconds(max_age_seconds) < kMinimumAgeForUsefulness) | |
| 71 reasons |= kShortMaxAge; | |
| 72 } | |
| 73 | |
| 74 Time date; | |
| 75 Time expires; | |
| 76 if (Time::FromString(response.httpHeaderField("Date").utf8().data(), &date) && | |
| 77 Time::FromString(response.httpHeaderField("Expires").utf8().data(), | |
| 78 &expires) && | |
| 79 date > Time() && expires > Time() && | |
| 80 (expires - date) < kMinimumAgeForUsefulness) { | |
| 81 reasons |= kExpiresTooSoon; | |
| 82 } | |
| 83 | |
| 84 return reasons; | |
| 85 } | |
| 86 | |
| 87 } // namespace content | |
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Chromium Code Reviews
Issue 495353003:
Move WebMediaPlayerImpl and its dependencies to media/blink. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master