content/child/ftp_directory_listing_response_delegate.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 "content/child/ftp_directory_listing_response_delegate.h"
   6
   7 #include <vector>
   8
   9 #include "base/i18n/icu_encoding_detection.h"
  10 #include "base/i18n/icu_string_conversions.h"
  11 #include "base/logging.h"
  12 #include "base/strings/string_util.h"
  13 #include "base/strings/sys_string_conversions.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/time/time.h"
  16 #include "net/base/escape.h"
  17 #include "net/base/net_errors.h"
  18 #include "net/base/net_util.h"
  19 #include "net/ftp/ftp_directory_listing_parser.h"
  20 #include "third_party/WebKit/public/platform/WebURL.h"
  21 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
  22 #include "webkit/child/weburlresponse_extradata_impl.h"
  23
  24 using net::FtpDirectoryListingEntry;
  25
  26 using blink::WebURLLoader;
  27 using blink::WebURLLoaderClient;
  28 using blink::WebURLResponse;
  29
  30 using webkit_glue::WebURLResponseExtraDataImpl;
  31
  32 namespace {
  33
  34 base::string16 ConvertPathToUTF16(const std::string& path) {
  35   // Per RFC 2640, FTP servers should use UTF-8 or its proper subset ASCII,
  36   // but many old FTP servers use legacy encodings. Try UTF-8 first.
  37   if (base::IsStringUTF8(path))
  38     return base::UTF8ToUTF16(path);
  39
  40   // Try detecting the encoding. The sample is rather small though, so it may
  41   // fail.
  42   std::string encoding;
  43   if (base::DetectEncoding(path, &encoding) && !encoding.empty()) {
  44     base::string16 path_utf16;
  45     if (base::CodepageToUTF16(path, encoding.c_str(),
  46                               base::OnStringConversionError::SUBSTITUTE,
  47                               &path_utf16)) {
  48       return path_utf16;
  49     }
  50   }
  51
  52   // Use system native encoding as the last resort.
  53   return base::WideToUTF16(base::SysNativeMBToWide(path));
  54 }
  55
  56 }  // namespace
  57
  58 namespace content {
  59
  60 FtpDirectoryListingResponseDelegate::FtpDirectoryListingResponseDelegate(
  61     WebURLLoaderClient* client,
  62     WebURLLoader* loader,
  63     const WebURLResponse& response)
  64     : client_(client),
  65       loader_(loader) {
  66   if (response.extraData()) {
  67     // extraData can be NULL during tests.
  68     WebURLResponseExtraDataImpl* extra_data =
  69         static_cast<WebURLResponseExtraDataImpl*>(response.extraData());
  70     extra_data->set_is_ftp_directory_listing(true);
  71   }
  72   Init(response.url());
  73 }
  74
  75 void FtpDirectoryListingResponseDelegate::OnReceivedData(const char* data,
  76                                                          int data_len) {
  77   buffer_.append(data, data_len);
  78 }
  79
  80 void FtpDirectoryListingResponseDelegate::OnCompletedRequest() {
  81   std::vector<FtpDirectoryListingEntry> entries;
  82   int rv = net::ParseFtpDirectoryListing(buffer_, base::Time::Now(), &entries);
  83   if (rv != net::OK) {
  84     SendDataToClient("<script>onListingParsingError();</script>\n");
  85     return;
  86   }
  87   for (size_t i = 0; i < entries.size(); i++) {
  88     const FtpDirectoryListingEntry& entry = entries[i];
  89
  90     // Skip the current and parent directory entries in the listing. Our header
  91     // always includes them.
  92     if (EqualsASCII(entry.name, ".") || EqualsASCII(entry.name, ".."))
  93       continue;
  94
  95     bool is_directory = (entry.type == FtpDirectoryListingEntry::DIRECTORY);
  96     int64 size = entry.size;
  97     if (entry.type != FtpDirectoryListingEntry::FILE)
  98       size = 0;
  99     SendDataToClient(net::GetDirectoryListingEntry(
 100         entry.name, entry.raw_name, is_directory, size, entry.last_modified));
 101   }
 102 }
 103
 104 void FtpDirectoryListingResponseDelegate::Init(const GURL& response_url) {
 105   net::UnescapeRule::Type unescape_rules = net::UnescapeRule::SPACES |
 106                                            net::UnescapeRule::URL_SPECIAL_CHARS;
 107   std::string unescaped_path = net::UnescapeURLComponent(response_url.path(),
 108                                                          unescape_rules);
 109   SendDataToClient(net::GetDirectoryListingHeader(
 110       ConvertPathToUTF16(unescaped_path)));
 111
 112   // If this isn't top level directory (i.e. the path isn't "/",)
 113   // add a link to the parent directory.
 114   if (response_url.path().length() > 1) {
 115     SendDataToClient(net::GetDirectoryListingEntry(
 116         base::ASCIIToUTF16(".."), std::string(), false, 0, base::Time()));
 117   }
 118 }
 119
 120 void FtpDirectoryListingResponseDelegate::SendDataToClient(
 121     const std::string& data) {
 122   client_->didReceiveData(loader_, data.data(), data.length(), -1);
 123 }
 124
 125 }  // namespace content