net/base/net_util_win.cc

   1 // Copyright (c) 2011 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 "net/base/net_util.h"
   6
   7 #include <iphlpapi.h>
   8
   9 #include <algorithm>
  10
  11 #include "base/file_path.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/string_piece.h"
  14 #include "base/string_util.h"
  15 #include "base/sys_string_conversions.h"
  16 #include "base/threading/thread_restrictions.h"
  17 #include "base/utf_string_conversions.h"
  18 #include "googleurl/src/gurl.h"
  19 #include "net/base/escape.h"
  20 #include "net/base/ip_endpoint.h"
  21 #include "net/base/net_errors.h"
  22
  23 namespace net {
  24
  25 bool FileURLToFilePath(const GURL& url, FilePath* file_path) {
  26   *file_path = FilePath();
  27   std::wstring& file_path_str = const_cast<std::wstring&>(file_path->value());
  28   file_path_str.clear();
  29
  30   if (!url.is_valid())
  31     return false;
  32
  33   std::string path;
  34   std::string host = url.host();
  35   if (host.empty()) {
  36     // URL contains no host, the path is the filename. In this case, the path
  37     // will probably be preceeded with a slash, as in "/C:/foo.txt", so we
  38     // trim out that here.
  39     path = url.path();
  40     size_t first_non_slash = path.find_first_not_of("/\\");
  41     if (first_non_slash != std::string::npos && first_non_slash > 0)
  42       path.erase(0, first_non_slash);
  43   } else {
  44     // URL contains a host: this means it's UNC. We keep the preceeding slash
  45     // on the path.
  46     path = "\\\\";
  47     path.append(host);
  48     path.append(url.path());
  49   }
  50
  51   if (path.empty())
  52     return false;
  53   std::replace(path.begin(), path.end(), '/', '\\');
  54
  55   // GURL stores strings as percent-encoded UTF-8, this will undo if possible.
  56   path = UnescapeURLComponent(path,
  57       UnescapeRule::SPACES | UnescapeRule::URL_SPECIAL_CHARS);
  58
  59   if (!IsStringUTF8(path)) {
  60     // Not UTF-8, assume encoding is native codepage and we're done. We know we
  61     // are giving the conversion function a nonempty string, and it may fail if
  62     // the given string is not in the current encoding and give us an empty
  63     // string back. We detect this and report failure.
  64     file_path_str = base::SysNativeMBToWide(path);
  65     return !file_path_str.empty();
  66   }
  67   file_path_str.assign(UTF8ToWide(path));
  68
  69   // We used to try too hard and see if |path| made up entirely of
  70   // the 1st 256 characters in the Unicode was a zero-extended UTF-16.
  71   // If so, we converted it to 'Latin-1' and checked if the result was UTF-8.
  72   // If the check passed, we converted the result to UTF-8.
  73   // Otherwise, we treated the result as the native OS encoding.
  74   // However, that led to http://crbug.com/4619 and http://crbug.com/14153
  75   return true;
  76 }
  77
  78 bool GetNetworkList(NetworkInterfaceList* networks) {
  79   // GetAdaptersAddresses() may require IO operations.
  80   base::ThreadRestrictions::AssertIOAllowed();
  81
  82   IP_ADAPTER_ADDRESSES info_temp;
  83   ULONG len = 0;
  84
  85   // First get number of networks.
  86   ULONG result = GetAdaptersAddresses(AF_UNSPEC, 0, NULL, &info_temp, &len);
  87   if (result != ERROR_BUFFER_OVERFLOW) {
  88     // There are 0 networks.
  89     return true;
  90   }
  91
  92   scoped_array<char> buf(new char[len]);
  93   IP_ADAPTER_ADDRESSES *adapters =
  94       reinterpret_cast<IP_ADAPTER_ADDRESSES *>(buf.get());
  95   result = GetAdaptersAddresses(AF_UNSPEC, 0, NULL, adapters, &len);
  96   if (result != NO_ERROR) {
  97     LOG(ERROR) << "GetAdaptersAddresses failed: " << result;
  98     return false;
  99   }
 100
 101   for (IP_ADAPTER_ADDRESSES *adapter = adapters; adapter != NULL;
 102        adapter = adapter->Next) {
 103     // Ignore the loopback device.
 104     if (adapter->IfType == IF_TYPE_SOFTWARE_LOOPBACK) {
 105       continue;
 106     }
 107
 108     IP_ADAPTER_UNICAST_ADDRESS* address;
 109     for (address = adapter->FirstUnicastAddress; address != NULL;
 110          address = address->Next) {
 111       int family = address->Address.lpSockaddr->sa_family;
 112       if (family == AF_INET || family == AF_INET6) {
 113         IPEndPoint endpoint;
 114         if (endpoint.FromSockAddr(address->Address.lpSockaddr,
 115                                   address->Address.iSockaddrLength)) {
 116           std::string name = adapter->AdapterName;
 117           networks->push_back(NetworkInterface(name, endpoint.address()));
 118         }
 119       }
 120     }
 121   }
 122
 123   return true;
 124 }
 125
 126 }  // namespace net