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/update_client/update_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 update_client::UpdateQueryParams;
  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 // Produces an extension-like friendly id.
  42 std::string HexStringToID(const std::string& hexstr) {
  43   std::string id;
  44   for (size_t i = 0; i < hexstr.size(); ++i) {
  45     int val = 0;
  46     if (base::HexStringToInt(
  47             base::StringPiece(hexstr.begin() + i, hexstr.begin() + i + 1),
  48             &val)) {
  49       id.append(1, val + 'a');
  50     } else {
  51       id.append(1, 'a');
  52     }
  53   }
  54
  55   DCHECK(crx_file::id_util::IdIsValid(id));
  56
  57   return id;
  58 }
  59
  60 }  // namespace
  61
  62 std::string BuildProtocolRequest(const std::string& browser_version,
  63                                  const std::string& channel,
  64                                  const std::string& lang,
  65                                  const std::string& os_long_name,
  66                                  const std::string& request_body,
  67                                  const std::string& additional_attributes) {
  68   const std::string prod_id(
  69       UpdateQueryParams::GetProdIdString(UpdateQueryParams::CHROME));
  70
  71   std::string request(
  72       "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
  73       "<request protocol=\"3.0\" ");
  74
  75   if (!additional_attributes.empty())
  76     base::StringAppendF(&request, "%s ", additional_attributes.c_str());
  77
  78   // Chrome version and platform information.
  79   base::StringAppendF(
  80       &request,
  81       "version=\"%s-%s\" prodversion=\"%s\" "
  82       "requestid=\"{%s}\" lang=\"%s\" updaterchannel=\"%s\" prodchannel=\"%s\" "
  83       "os=\"%s\" arch=\"%s\" nacl_arch=\"%s\"",
  84       prod_id.c_str(),
  85       browser_version.c_str(),            // "version"
  86       browser_version.c_str(),            // "prodversion"
  87       base::GenerateGUID().c_str(),       // "requestid"
  88       lang.c_str(),                       // "lang",
  89       channel.c_str(),                    // "updaterchannel"
  90       channel.c_str(),                    // "prodchannel"
  91       UpdateQueryParams::GetOS(),         // "os"
  92       UpdateQueryParams::GetArch(),       // "arch"
  93       UpdateQueryParams::GetNaclArch());  // "nacl_arch"
  94 #if defined(OS_WIN)
  95   const bool is_wow64(base::win::OSInfo::GetInstance()->wow64_status() ==
  96                       base::win::OSInfo::WOW64_ENABLED);
  97   if (is_wow64)
  98     base::StringAppendF(&request, " wow64=\"1\"");
  99 #endif
 100   base::StringAppendF(&request, ">");
 101
 102   // HW platform information.
 103   base::StringAppendF(&request,
 104                       "<hw physmemory=\"%d\"/>",
 105                       GetPhysicalMemoryGB());  // "physmem" in GB.
 106
 107   // OS version and platform information.
 108   base::StringAppendF(
 109       &request,
 110       "<os platform=\"%s\" version=\"%s\" arch=\"%s\"/>",
 111       os_long_name.c_str(),                                    // "platform"
 112       base::SysInfo().OperatingSystemVersion().c_str(),        // "version"
 113       base::SysInfo().OperatingSystemArchitecture().c_str());  // "arch"
 114
 115   // The actual payload of the request.
 116   base::StringAppendF(&request, "%s</request>", request_body.c_str());
 117
 118   return request;
 119 }
 120
 121 net::URLFetcher* SendProtocolRequest(
 122     const GURL& url,
 123     const std::string& protocol_request,
 124     net::URLFetcherDelegate* url_fetcher_delegate,
 125     net::URLRequestContextGetter* url_request_context_getter) {
 126   net::URLFetcher* url_fetcher(net::URLFetcher::Create(
 127       0, url, net::URLFetcher::POST, url_fetcher_delegate));
 128
 129   url_fetcher->SetUploadData("application/xml", protocol_request);
 130   url_fetcher->SetRequestContext(url_request_context_getter);
 131   url_fetcher->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
 132                             net::LOAD_DO_NOT_SAVE_COOKIES |
 133                             net::LOAD_DISABLE_CACHE);
 134   url_fetcher->SetAutomaticallyRetryOn5xx(false);
 135   url_fetcher->Start();
 136
 137   return url_fetcher;
 138 }
 139
 140 bool FetchSuccess(const net::URLFetcher& fetcher) {
 141   return GetFetchError(fetcher) == 0;
 142 }
 143
 144 int GetFetchError(const net::URLFetcher& fetcher) {
 145   const net::URLRequestStatus::Status status(fetcher.GetStatus().status());
 146   switch (status) {
 147     case net::URLRequestStatus::IO_PENDING:
 148     case net::URLRequestStatus::CANCELED:
 149       // Network status is a small positive number.
 150       return status;
 151
 152     case net::URLRequestStatus::SUCCESS: {
 153       // Response codes are positive numbers, greater than 100.
 154       const int response_code(fetcher.GetResponseCode());
 155       if (response_code == 200)
 156         return 0;
 157       else
 158         return response_code ? response_code : -1;
 159     }
 160
 161     case net::URLRequestStatus::FAILED: {
 162       // Network errors are small negative numbers.
 163       const int error = fetcher.GetStatus().error();
 164       return error ? error : -1;
 165     }
 166
 167     default:
 168       return -1;
 169   }
 170 }
 171
 172 bool HasDiffUpdate(const CrxUpdateItem* update_item) {
 173   return !update_item->crx_diffurls.empty();
 174 }
 175
 176 bool IsHttpServerError(int status_code) {
 177   return 500 <= status_code && status_code < 600;
 178 }
 179
 180 bool DeleteFileAndEmptyParentDirectory(const base::FilePath& filepath) {
 181   if (!base::DeleteFile(filepath, false))
 182     return false;
 183
 184   const base::FilePath dirname(filepath.DirName());
 185   if (!base::IsDirectoryEmpty(dirname))
 186     return true;
 187
 188   return base::DeleteFile(dirname, false);
 189 }
 190
 191 std::string GetCrxComponentID(const CrxComponent& component) {
 192   const size_t kCrxIdSize = 16;
 193   CHECK_GE(component.pk_hash.size(), kCrxIdSize);
 194   return HexStringToID(base::StringToLowerASCII(
 195       base::HexEncode(&component.pk_hash[0], kCrxIdSize)));
 196 }
 197
 198 }  // namespace component_updater