Moved data reduction proxy header processing out of net

BUG=367221

Review URL: https://codereview.chromium.org/318753005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@277314 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 59 insertions, 0 deletions

diff --git a/components/data_reduction_proxy/common/data_reduction_proxy_headers.h b/components/data_reduction_proxy/common/data_reduction_proxy_headers.h
new file mode 100644
index 0000000..88b0cd0
--- /dev/null
+++ b/components/data_reduction_proxy/common/data_reduction_proxy_headers.h
@@ -0,0 +1,59 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_DATA_REDUCTION_PROXY_COMMON_DATA_REDUCTION_PROXY_HEADERS_H_
+#define COMPONENTS_DATA_REDUCTION_PROXY_COMMON_DATA_REDUCTION_PROXY_HEADERS_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "base/time/time.h"
+#include "net/http/http_response_headers.h"
+#include "net/proxy/proxy_service.h"
+
+namespace data_reduction_proxy {
+
+// Contains instructions contained in the Chrome-Proxy header.
+struct DataReductionProxyInfo {
+  DataReductionProxyInfo() : bypass_all(false) {}
+
+  // True if Chrome should bypass all available data reduction proxies. False
+  // if only the currently connected data reduction proxy should be bypassed.
+  bool bypass_all;
+
+  // Amount of time to bypass the data reduction proxy or proxies.
+  base::TimeDelta bypass_duration;
+};
+
+// Returns true if the Chrome-Proxy header is present and contains a bypass
+// delay. Sets |proxy_info->bypass_duration| to the specified delay if greater
+// than 0, and to 0 otherwise to indicate that the default proxy delay
+// (as specified in |ProxyList::UpdateRetryInfoOnFallback|) should be used.
+// If all available data reduction proxies should by bypassed, |bypass_all| is
+// set to true. |proxy_info| must be non-NULL.
+bool GetDataReductionProxyInfo(
+    const net::HttpResponseHeaders* headers,
+    DataReductionProxyInfo* proxy_info);
+
+// Returns true if the response contain the data reduction proxy Via header
+// value. Used to check the integrity of data reduction proxy responses.
+bool HasDataReductionProxyViaHeader(const net::HttpResponseHeaders* headers);
+
+// Returns the reason why the Chrome proxy should be bypassed or not, and
+// populates |proxy_info| with information on how long to bypass if
+// applicable.
+net::ProxyService::DataReductionProxyBypassEventType
+GetDataReductionProxyBypassEventType(
+    const net::HttpResponseHeaders* headers,
+    DataReductionProxyInfo* proxy_info);
+
+// Searches for the specified Chrome-Proxy action, and if present interprets
+// its value as a duration in seconds.
+bool GetDataReductionProxyBypassDuration(
+    const net::HttpResponseHeaders* headers,
+    const std::string& action_prefix,
+    base::TimeDelta* duration);
+
+}  // namespace data_reduction_proxy
+#endif  // COMPONENTS_DATA_REDUCTION_PROXY_COMMON_DATA_REDUCTION_PROXY_HEADERS_H_