Differential updates for components.

chrome/common/extensions/update_manifest.h

 // Copyright (c) 2010 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_COMMON_EXTENSIONS_UPDATE_MANIFEST_H_
 #define CHROME_COMMON_EXTENSIONS_UPDATE_MANIFEST_H_
 
 #include <string>
 #include <vector>
 
 #include "googleurl/src/gurl.h"
 
 class UpdateManifest {
  public:
 
   // An update manifest looks like this:
   //
-  // <?xml version='1.0' encoding='UTF-8'?>
-  // <gupdate xmlns='http://www.google.com/update2/response' protocol='2.0'>
-  //  <daystart elapsed_seconds='300' />
-  //  <app appid='12345'>
-  //   <updatecheck codebase='http://example.com/extension_1.2.3.4.crx'
-  //                version='1.2.3.4' prodversionmin='2.0.143.0'
-  //                hash="12345"/>
+  // <?xml version="1.0" encoding="UTF-8"?>
+  // <gupdate xmlns="http://www.google.com/update2/response" protocol="2.0">
+  //  <daystart elapsed_seconds="300" />
+  //  <app appid="12345" status="ok">
+  //   <updatecheck codebase="http://example.com/extension_1.2.3.4.crx"
+  //                hash="12345" size="9854" status="ok" version="1.2.3.4"
+  //                prodversionmin="2.0.143.0"
+  //                codebasediff="http://example.com/diff_1.2.3.4.crx"
+  //                hashdiff="123" sizediff="101" />
   //  </app>
   // </gupdate>
   //
   // 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.
+
   // The result of parsing one <app> tag in an xml update check manifest.
   struct Result {
     Result();
     ~Result();
 
     std::string extension_id;
     std::string version;
     std::string browser_min_version;
+
+    // Attributes for the full update.
+    GURL crx_url;
     std::string package_hash;
-    GURL crx_url;
+    int size;
+    std::string package_fingerprint;
+
+    // Attributes for the differential update.
+    GURL diff_crx_url;
+    std::string diff_package_hash;
+    int diff_size;
   };
 
   static const int kNoDaystart = -1;
   struct Results {
     Results();
     ~Results();
 
     std::vector<Result> list;
     // This will be >= 0, or kNoDaystart if the <daystart> tag was not present.
     int daystart_elapsed_seconds;
@@ skipping 15 matching lines @@
   Results results_;
   std::string errors_;
 
   // Helper function that adds parse error details to our errors_ string.
   void ParseError(const char* details, ...);
 
   DISALLOW_COPY_AND_ASSIGN(UpdateManifest);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_UPDATE_MANIFEST_H_