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 <stdint.h>
   8 #include <cmath>
   9
  10 #include "base/files/file_path.h"
  11 #include "base/files/file_util.h"
  12 #include "base/guid.h"
  13 #include "base/strings/string_number_conversions.h"
  14 #include "base/strings/string_piece.h"
  15 #include "base/strings/string_util.h"
  16 #include "base/strings/stringprintf.h"
  17 #include "base/sys_info.h"
  18 #include "base/win/windows_version.h"
  19 #include "components/component_updater/component_updater_configurator.h"
  20 #include "components/component_updater/crx_update_item.h"
  21 #include "components/crx_file/id_util.h"
  22 #include "components/omaha_query_params/omaha_query_params.h"
  23 #include "net/base/load_flags.h"
  24 #include "net/url_request/url_fetcher.h"
  25 #include "net/url_request/url_request_context_getter.h"
  26 #include "net/url_request/url_request_status.h"
  27
  28 using omaha_query_params::OmahaQueryParams;
  29
  30 namespace component_updater {
  31
  32 namespace {
  33
  34 // Returns the amount of physical memory in GB, rounded to the nearest GB.
  35 int GetPhysicalMemoryGB() {
  36   const double kOneGB = 1024 * 1024 * 1024;
  37   const int64_t phys_mem = base::SysInfo::AmountOfPhysicalMemory();
  38   return static_cast<int>(std::floor(0.5 + phys_mem / kOneGB));
  39 }
  40
  41 }  // namespace
  42
  43 std::string BuildProtocolRequest(const std::string& browser_version,
  44                                  const std::string& channel,
  45                                  const std::string& lang,
  46                                  const std::string& os_long_name,
  47                                  const std::string& request_body,
  48                                  const std::string& additional_attributes) {
  49   const std::string prod_id(
  50       OmahaQueryParams::GetProdIdString(OmahaQueryParams::CHROME));
  51
  52   std::string request(
  53       "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
  54       "<request protocol=\"3.0\" ");
  55
  56   if (!additional_attributes.empty())
  57     base::StringAppendF(&request, "%s ", additional_attributes.c_str());
  58
  59   // Chrome version and platform information.
  60   base::StringAppendF(
  61       &request,
  62       "version=\"%s-%s\" prodversion=\"%s\" "
  63       "requestid=\"{%s}\" lang=\"%s\" updaterchannel=\"%s\" prodchannel=\"%s\" "
  64       "os=\"%s\" arch=\"%s\" nacl_arch=\"%s\"",
  65       prod_id.c_str(),
  66       browser_version.c_str(),           // "version"
  67       browser_version.c_str(),           // "prodversion"
  68       base::GenerateGUID().c_str(),      // "requestid"
  69       lang.c_str(),                      // "lang",
  70       channel.c_str(),                   // "updaterchannel"
  71       channel.c_str(),                   // "prodchannel"
  72       OmahaQueryParams::GetOS(),         // "os"
  73       OmahaQueryParams::GetArch(),       // "arch"
  74       OmahaQueryParams::GetNaclArch());  // "nacl_arch"
  75 #if defined(OS_WIN)
  76   const bool is_wow64(base::win::OSInfo::GetInstance()->wow64_status() ==
  77                       base::win::OSInfo::WOW64_ENABLED);
  78   if (is_wow64)
  79     base::StringAppendF(&request, " wow64=\"1\"");
  80 #endif
  81   base::StringAppendF(&request, ">");
  82
  83   // HW platform information.
  84   base::StringAppendF(&request,
  85                       "<hw physmemory=\"%d\"/>",
  86                       GetPhysicalMemoryGB());  // "physmem" in GB.
  87
  88   // OS version and platform information.
  89   base::StringAppendF(
  90       &request,
  91       "<os platform=\"%s\" version=\"%s\" arch=\"%s\"/>",
  92       os_long_name.c_str(),                                    // "platform"
  93       base::SysInfo().OperatingSystemVersion().c_str(),        // "version"
  94       base::SysInfo().OperatingSystemArchitecture().c_str());  // "arch"
  95
  96   // The actual payload of the request.
  97   base::StringAppendF(&request, "%s</request>", request_body.c_str());
  98
  99   return request;
 100 }
 101
 102 net::URLFetcher* SendProtocolRequest(
 103     const GURL& url,
 104     const std::string& protocol_request,
 105     net::URLFetcherDelegate* url_fetcher_delegate,
 106     net::URLRequestContextGetter* url_request_context_getter) {
 107   net::URLFetcher* url_fetcher(net::URLFetcher::Create(
 108       0, url, net::URLFetcher::POST, url_fetcher_delegate));
 109
 110   url_fetcher->SetUploadData("application/xml", protocol_request);
 111   url_fetcher->SetRequestContext(url_request_context_getter);
 112   url_fetcher->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
 113                             net::LOAD_DO_NOT_SAVE_COOKIES |
 114                             net::LOAD_DISABLE_CACHE);
 115   url_fetcher->SetAutomaticallyRetryOn5xx(false);
 116   url_fetcher->Start();
 117
 118   return url_fetcher;
 119 }
 120
 121 bool FetchSuccess(const net::URLFetcher& fetcher) {
 122   return GetFetchError(fetcher) == 0;
 123 }
 124
 125 int GetFetchError(const net::URLFetcher& fetcher) {
 126   const net::URLRequestStatus::Status status(fetcher.GetStatus().status());
 127   switch (status) {
 128     case net::URLRequestStatus::IO_PENDING:
 129     case net::URLRequestStatus::CANCELED:
 130       // Network status is a small positive number.
 131       return status;
 132
 133     case net::URLRequestStatus::SUCCESS: {
 134       // Response codes are positive numbers, greater than 100.
 135       const int response_code(fetcher.GetResponseCode());
 136       if (response_code == 200)
 137         return 0;
 138       else
 139         return response_code ? response_code : -1;
 140     }
 141
 142     case net::URLRequestStatus::FAILED: {
 143       // Network errors are small negative numbers.
 144       const int error = fetcher.GetStatus().error();
 145       return error ? error : -1;
 146     }
 147
 148     default:
 149       return -1;
 150   }
 151 }
 152
 153 bool HasDiffUpdate(const CrxUpdateItem* update_item) {
 154   return !update_item->crx_diffurls.empty();
 155 }
 156
 157 bool IsHttpServerError(int status_code) {
 158   return 500 <= status_code && status_code < 600;
 159 }
 160
 161 bool DeleteFileAndEmptyParentDirectory(const base::FilePath& filepath) {
 162   if (!base::DeleteFile(filepath, false))
 163     return false;
 164
 165   const base::FilePath dirname(filepath.DirName());
 166   if (!base::IsDirectoryEmpty(dirname))
 167     return true;
 168
 169   return base::DeleteFile(dirname, false);
 170 }
 171
 172 // Produces an extension-like friendly id.
 173 std::string HexStringToID(const std::string& hexstr) {
 174   std::string id;
 175   for (size_t i = 0; i < hexstr.size(); ++i) {
 176     int val = 0;
 177     if (base::HexStringToInt(
 178             base::StringPiece(hexstr.begin() + i, hexstr.begin() + i + 1),
 179             &val)) {
 180       id.append(1, val + 'a');
 181     } else {
 182       id.append(1, 'a');
 183     }
 184   }
 185
 186   DCHECK(crx_file::id_util::IdIsValid(id));
 187
 188   return id;
 189 }
 190
 191 std::string GetCrxComponentID(const CrxComponent& component) {
 192   return HexStringToID(base::StringToLowerASCII(
 193       base::HexEncode(&component.pk_hash[0], component.pk_hash.size() / 2)));
 194 }
 195
 196 }  // namespace component_updater