Changed the update protocol for component updater from v2 to v3.

chrome/browser/component_updater/update_manifest.h

+// Copyright (c) 2013 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 CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_MANIFEST_H_
+#define CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_MANIFEST_H_
+
+#include <string>
+#include <vector>
+#include "base/basictypes.h"
+#include "url/gurl.h"
+
+namespace component_updater {
+
+// Parses responses for the update protocol version 3.
+// (http://code.google.com/p/omaha/wiki/ServerProtocol)
+//
+// An update manifest looks like this:
+//
+// <?xml version="1.0" encoding="UTF-8"?>
+//  <response protocol="3.0" server="prod">
+//    <daystart elapsed_seconds="56508"/>
+//    <app appid="{430FD4D0-B729-4F61-AA34-91526481799D}" status="ok">
+//      <updatecheck status="noupdate"/>
+//      <ping status="ok"/>
+//    </app>
+//    <app appid="{D0AB2EBC-931B-4013-9FEB-C9C4C2225C8C}" status="ok">
+//      <updatecheck status="ok">
+//        <urls>
+//          <url codebase="http://host/edgedl/chrome/install/782.112/"
+//          <url codebasediff="http://fallback/chrome/diff/782.112/"/>
+//        </urls>
+//        <manifest version="13.0.782.112" prodversionmin="2.0.143.0">
+//          <packages>
+//            <package name="component.crx"
+//                     namediff="diff_1.2.3.4.crx"
+//                     fp="1.123"
+//                     hash_sha256="9830b4245c4..." size="23963192"
+//                     hashdiff_sha256="cfb6caf3d0..." sizediff="101"/>
+//          </packages>
+//        </manifest>
+//      </updatecheck>
+//      <ping status="ok"/>
+//    </app>
+//  </response>
+//
+// The <daystart> tag contains a "elapsed_seconds" attribute which refers to
+// the server's notion of how many seconds it has been since midnight.
+//
+// The "appid" attribute of the <app> tag refers to the unique id of the
+// extension. The "codebase" attribute of the <updatecheck> tag is the url to
+// fetch the updated crx file, and the "prodversionmin" attribute refers to
+// the minimum version of the chrome browser that the update applies to.
+//
+// The diff data members correspond to the differential update package, if
+// a differential update is specified in the response.
+class UpdateManifest {
+ public:
+
+  // The result of parsing one <app> tag in an xml update check manifest.
+  struct Result {
+    struct Manifest {
+      struct Package {
+        Package();
+        ~Package();
+
+        std::string fingerprint;
+
+        // Attributes for the full update.
+        std::string name;
+        std::string hash_sha256;
+        int size;
+
+        // Attributes for the differential update.
+        std::string namediff;
+        std::string hashdiff_sha256;
+        int sizediff;
+      };
+
+      Manifest();
+      ~Manifest();
+
+      std::string version;
+      std::string browser_min_version;
+      std::vector<Package> packages;
+    };
+
+    Result();
+    ~Result();
+
+    std::string extension_id;
+
+    // The list of fallback urls, for full and diff updates respectively.
+    std::vector<GURL> crx_urls;
+    std::vector<GURL> crx_diffurls;
+
+    Manifest manifest;
+  };
+
+  static const int kNoDaystart = -1;
+  struct Results {
+    Results();
+    ~Results();
+
+    // This will be >= 0, or kNoDaystart if the <daystart> tag was not present.
+    int daystart_elapsed_seconds;
+    std::vector<Result> list;
+  };
+
+  UpdateManifest();
+  ~UpdateManifest();
+
+  // Parses an update manifest xml string into Result data. Returns a bool
+  // indicating success or failure. On success, the results are available by
+  // calling results(). The details for any failures are available by calling
+  // errors().
+  bool Parse(const std::string& manifest_xml);
+
+  const Results& results() const { return results_; }
+  const std::string& errors() const { return errors_; }
+
+ private:
+  Results results_;
+  std::string errors_;
+
+  // Adds parse error details to |errors_| string.
+  void ParseError(const char* details, ...);
+
+  DISALLOW_COPY_AND_ASSIGN(UpdateManifest);
+};
+
+}  // namespace component_updater
+
+#endif  // CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_MANIFEST_H_