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