components/component_updater/component_updater_utils.cc

   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 #include "components/component_updater/component_updater_utils.h"
   6
   7 #include <cmath>
   8
   9 #include "base/file_util.h"
  10 #include "base/files/file_path.h"
  11 #include "base/guid.h"
  12 #include "base/strings/string_number_conversions.h"
  13 #include "base/strings/string_piece.h"
  14 #include "base/strings/string_util.h"
  15 #include "base/strings/stringprintf.h"
  16 #include "base/sys_info.h"
  17 #include "base/win/windows_version.h"
  18 #include "components/component_updater/component_updater_configurator.h"
  19 #include "components/component_updater/crx_update_item.h"
  20 #include "components/crx_file/id_util.h"
  21 #include "components/omaha_query_params/omaha_query_params.h"
  22 #include "net/base/load_flags.h"
  23 #include "net/url_request/url_fetcher.h"
  24 #include "net/url_request/url_request_context_getter.h"
  25 #include "net/url_request/url_request_status.h"
  26
  27 using omaha_query_params::OmahaQueryParams;
  28
  29 namespace component_updater {
  30
  31 namespace {
  32
  33 // Returns the amount of physical memory in GB, rounded to the nearest GB.
  34 int GetPhysicalMemoryGB() {
  35   const double kOneGB = 1024 * 1024 * 1024;
  36   const int64 phys_mem = base::SysInfo::AmountOfPhysicalMemory();
  37   return static_cast<int>(std::floor(0.5 + phys_mem / kOneGB));
  38 }
  39
  40 }  // namespace
  41
  42 std::string BuildProtocolRequest(const std::string& browser_version,
  43                                  const std::string& channel,
  44                                  const std::string& lang,
  45                                  const std::string& os_long_name,
  46                                  const std::string& request_body,
  47                                  const std::string& additional_attributes) {
  48   const std::string prod_id(
  49       OmahaQueryParams::GetProdIdString(OmahaQueryParams::CHROME));
  50
  51   std::string request(
  52       "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
  53       "<request protocol=\"3.0\" ");
  54
  55   if (!additional_attributes.empty())
  56     base::StringAppendF(&request, "%s ", additional_attributes.c_str());
  57
  58   // Chrome version and platform information.
  59   base::StringAppendF(
  60       &request,
  61       "version=\"%s-%s\" prodversion=\"%s\" "
  62       "requestid=\"{%s}\" lang=\"%s\" updaterchannel=\"%s\" prodchannel=\"%s\" "
  63       "os=\"%s\" arch=\"%s\" nacl_arch=\"%s\"",
  64       prod_id.c_str(),
  65       browser_version.c_str(),           // "version"
  66       browser_version.c_str(),           // "prodversion"
  67       base::GenerateGUID().c_str(),      // "requestid"
  68       lang.c_str(),                      // "lang",
  69       channel.c_str(),                   // "updaterchannel"
  70       channel.c_str(),                   // "prodchannel"
  71       OmahaQueryParams::GetOS(),         // "os"
  72       OmahaQueryParams::GetArch(),       // "arch"
  73       OmahaQueryParams::GetNaclArch());  // "nacl_arch"
  74 #if defined(OS_WIN)
  75   const bool is_wow64(base::win::OSInfo::GetInstance()->wow64_status() ==
  76                       base::win::OSInfo::WOW64_ENABLED);
  77   if (is_wow64)
  78     base::StringAppendF(&request, " wow64=\"1\"");
  79 #endif
  80   base::StringAppendF(&request, ">");
  81
  82   // HW platform information.
  83   base::StringAppendF(&request,
  84                       "<hw physmemory=\"%d\"/>",
  85                       GetPhysicalMemoryGB());  // "physmem" in GB.
  86
  87   // OS version and platform information.
  88   base::StringAppendF(
  89       &request,
  90       "<os platform=\"%s\" version=\"%s\" arch=\"%s\"/>",
  91       os_long_name.c_str(),                                    // "platform"
  92       base::SysInfo().OperatingSystemVersion().c_str(),        // "version"
  93       base::SysInfo().OperatingSystemArchitecture().c_str());  // "arch"
  94
  95   // The actual payload of the request.
  96   base::StringAppendF(&request, "%s</request>", request_body.c_str());
  97
  98   return request;
  99 }
 100
 101 net::URLFetcher* SendProtocolRequest(
 102     const GURL& url,
 103     const std::string& protocol_request,
 104     net::URLFetcherDelegate* url_fetcher_delegate,
 105     net::URLRequestContextGetter* url_request_context_getter) {
 106   net::URLFetcher* url_fetcher(net::URLFetcher::Create(
 107       0, url, net::URLFetcher::POST, url_fetcher_delegate));
 108
 109   url_fetcher->SetUploadData("application/xml", protocol_request);
 110   url_fetcher->SetRequestContext(url_request_context_getter);
 111   url_fetcher->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
 112                             net::LOAD_DO_NOT_SAVE_COOKIES |
 113                             net::LOAD_DISABLE_CACHE);
 114   url_fetcher->SetAutomaticallyRetryOn5xx(false);
 115   url_fetcher->Start();
 116
 117   return url_fetcher;
 118 }
 119
 120 bool FetchSuccess(const net::URLFetcher& fetcher) {
 121   return GetFetchError(fetcher) == 0;
 122 }
 123
 124 int GetFetchError(const net::URLFetcher& fetcher) {
 125   const net::URLRequestStatus::Status status(fetcher.GetStatus().status());
 126   switch (status) {
 127     case net::URLRequestStatus::IO_PENDING:
 128     case net::URLRequestStatus::CANCELED:
 129       // Network status is a small positive number.
 130       return status;
 131
 132     case net::URLRequestStatus::SUCCESS: {
 133       // Response codes are positive numbers, greater than 100.
 134       const int response_code(fetcher.GetResponseCode());
 135       if (response_code == 200)
 136         return 0;
 137       else
 138         return response_code ? response_code : -1;
 139     }
 140
 141     case net::URLRequestStatus::FAILED: {
 142       // Network errors are small negative numbers.
 143       const int error = fetcher.GetStatus().error();
 144       return error ? error : -1;
 145     }
 146
 147     default:
 148       return -1;
 149   }
 150 }
 151
 152 bool HasDiffUpdate(const CrxUpdateItem* update_item) {
 153   return !update_item->crx_diffurls.empty();
 154 }
 155
 156 bool IsHttpServerError(int status_code) {
 157   return 500 <= status_code && status_code < 600;
 158 }
 159
 160 bool DeleteFileAndEmptyParentDirectory(const base::FilePath& filepath) {
 161   if (!base::DeleteFile(filepath, false))
 162     return false;
 163
 164   const base::FilePath dirname(filepath.DirName());
 165   if (!base::IsDirectoryEmpty(dirname))
 166     return true;
 167
 168   return base::DeleteFile(dirname, false);
 169 }
 170
 171 // Produces an extension-like friendly id.
 172 std::string HexStringToID(const std::string& hexstr) {
 173   std::string id;
 174   for (size_t i = 0; i < hexstr.size(); ++i) {
 175     int val = 0;
 176     if (base::HexStringToInt(
 177             base::StringPiece(hexstr.begin() + i, hexstr.begin() + i + 1),
 178             &val)) {
 179       id.append(1, val + 'a');
 180     } else {
 181       id.append(1, 'a');
 182     }
 183   }
 184
 185   DCHECK(crx_file::id_util::IdIsValid(id));
 186
 187   return id;
 188 }
 189
 190 std::string GetCrxComponentID(const CrxComponent& component) {
 191   return HexStringToID(base::StringToLowerASCII(
 192       base::HexEncode(&component.pk_hash[0], component.pk_hash.size() / 2)));
 193 }
 194
 195 }  // namespace component_updater