components/component_updater/update_response.h

   1 // Copyright 2014 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 #ifndef COMPONENTS_COMPONENT_UPDATER_UPDATE_RESPONSE_H_
   6 #define COMPONENTS_COMPONENT_UPDATER_UPDATE_RESPONSE_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/macros.h"
  12 #include "url/gurl.h"
  13
  14 namespace component_updater {
  15
  16 // Parses responses for the update protocol version 3.
  17 // (http://code.google.com/p/omaha/wiki/ServerProtocol)
  18 //
  19 // An update response looks like this:
  20 //
  21 // <?xml version="1.0" encoding="UTF-8"?>
  22 //  <response protocol="3.0" server="prod">
  23 //    <daystart elapsed_seconds="56508"/>
  24 //    <app appid="{430FD4D0-B729-4F61-AA34-91526481799D}" status="ok">
  25 //      <updatecheck status="noupdate"/>
  26 //      <ping status="ok"/>
  27 //    </app>
  28 //    <app appid="{D0AB2EBC-931B-4013-9FEB-C9C4C2225C8C}" status="ok">
  29 //      <updatecheck status="ok">
  30 //        <urls>
  31 //          <url codebase="http://host/edgedl/chrome/install/782.112/"
  32 //          <url codebasediff="http://fallback/chrome/diff/782.112/"/>
  33 //        </urls>
  34 //        <manifest version="13.0.782.112" prodversionmin="2.0.143.0">
  35 //          <packages>
  36 //            <package name="component.crx"
  37 //                     namediff="diff_1.2.3.4.crx"
  38 //                     fp="1.123"
  39 //                     hash_sha256="9830b4245c4..." size="23963192"
  40 //                     hashdiff_sha256="cfb6caf3d0..." sizediff="101"/>
  41 //          </packages>
  42 //        </manifest>
  43 //      </updatecheck>
  44 //      <ping status="ok"/>
  45 //    </app>
  46 //  </response>
  47 //
  48 // The <daystart> tag contains a "elapsed_seconds" attribute which refers to
  49 // the server's notion of how many seconds it has been since midnight.
  50 //
  51 // The "appid" attribute of the <app> tag refers to the unique id of the
  52 // extension. The "codebase" attribute of the <updatecheck> tag is the url to
  53 // fetch the updated crx file, and the "prodversionmin" attribute refers to
  54 // the minimum version of the chrome browser that the update applies to.
  55 //
  56 // The diff data members correspond to the differential update package, if
  57 // a differential update is specified in the response.
  58 class UpdateResponse {
  59  public:
  60   // The result of parsing one <app> tag in an xml update check response.
  61   struct Result {
  62     struct Manifest {
  63       struct Package {
  64         Package();
  65         ~Package();
  66
  67         std::string fingerprint;
  68
  69         // Attributes for the full update.
  70         std::string name;
  71         std::string hash_sha256;
  72         int size;
  73
  74         // Attributes for the differential update.
  75         std::string namediff;
  76         std::string hashdiff_sha256;
  77         int sizediff;
  78       };
  79
  80       Manifest();
  81       ~Manifest();
  82
  83       std::string version;
  84       std::string browser_min_version;
  85       std::vector<Package> packages;
  86     };
  87
  88     Result();
  89     ~Result();
  90
  91     std::string extension_id;
  92
  93     // The list of fallback urls, for full and diff updates respectively.
  94     // These urls are base urls; they don't include the filename.
  95     std::vector<GURL> crx_urls;
  96     std::vector<GURL> crx_diffurls;
  97
  98     Manifest manifest;
  99   };
 100
 101   static const int kNoDaystart = -1;
 102   struct Results {
 103     Results();
 104     ~Results();
 105
 106     // This will be >= 0, or kNoDaystart if the <daystart> tag was not present.
 107     int daystart_elapsed_seconds;
 108     std::vector<Result> list;
 109   };
 110
 111   UpdateResponse();
 112   ~UpdateResponse();
 113
 114   // Parses an update response xml string into Result data. Returns a bool
 115   // indicating success or failure. On success, the results are available by
 116   // calling results(). The details for any failures are available by calling
 117   // errors().
 118   bool Parse(const std::string& manifest_xml);
 119
 120   const Results& results() const { return results_; }
 121   const std::string& errors() const { return errors_; }
 122
 123  private:
 124   Results results_;
 125   std::string errors_;
 126
 127   // Adds parse error details to |errors_| string.
 128   void ParseError(const char* details, ...);
 129
 130   DISALLOW_COPY_AND_ASSIGN(UpdateResponse);
 131 };
 132
 133 }  // namespace component_updater
 134
 135 #endif  // COMPONENTS_COMPONENT_UPDATER_UPDATE_RESPONSE_H_