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 "content/child/weburlresponse_extradata_impl.h"
  17 #include "net/base/escape.h"
  18 #include "net/base/net_errors.h"
  19 #include "net/base/net_util.h"
  20 #include "net/ftp/ftp_directory_listing_parser.h"
  21 #include "third_party/WebKit/public/platform/WebURL.h"
  22 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
  23
  24 using blink::WebURLLoader;
  25 using blink::WebURLLoaderClient;
  26 using blink::WebURLResponse;
  27 using net::FtpDirectoryListingEntry;
  28
  29 namespace {
  30
  31 base::string16 ConvertPathToUTF16(const std::string& path) {
  32   // Per RFC 2640, FTP servers should use UTF-8 or its proper subset ASCII,
  33   // but many old FTP servers use legacy encodings. Try UTF-8 first.
  34   if (base::IsStringUTF8(path))
  35     return base::UTF8ToUTF16(path);
  36
  37   // Try detecting the encoding. The sample is rather small though, so it may
  38   // fail.
  39   std::string encoding;
  40   if (base::DetectEncoding(path, &encoding) && !encoding.empty()) {
  41     base::string16 path_utf16;
  42     if (base::CodepageToUTF16(path, encoding.c_str(),
  43                               base::OnStringConversionError::SUBSTITUTE,
  44                               &path_utf16)) {
  45       return path_utf16;
  46     }
  47   }
  48
  49   // Use system native encoding as the last resort.
  50   return base::WideToUTF16(base::SysNativeMBToWide(path));
  51 }
  52
  53 }  // namespace
  54
  55 namespace content {
  56
  57 FtpDirectoryListingResponseDelegate::FtpDirectoryListingResponseDelegate(
  58     WebURLLoaderClient* client,
  59     WebURLLoader* loader,
  60     const WebURLResponse& response)
  61     : client_(client),
  62       loader_(loader) {
  63   if (response.extraData()) {
  64     // extraData can be NULL during tests.
  65     WebURLResponseExtraDataImpl* extra_data =
  66         static_cast<WebURLResponseExtraDataImpl*>(response.extraData());
  67     extra_data->set_is_ftp_directory_listing(true);
  68   }
  69   Init(response.url());
  70 }
  71
  72 void FtpDirectoryListingResponseDelegate::Cancel() {
  73   client_ = NULL;
  74   loader_ = NULL;
  75 }
  76
  77 void FtpDirectoryListingResponseDelegate::OnReceivedData(const char* data,
  78                                                          int data_len) {
  79   buffer_.append(data, data_len);
  80 }
  81
  82 void FtpDirectoryListingResponseDelegate::OnCompletedRequest() {
  83   std::vector<FtpDirectoryListingEntry> entries;
  84   int rv = -1;
  85 #if !defined(DISABLE_FTP_SUPPORT)
  86   rv = net::ParseFtpDirectoryListing(buffer_, base::Time::Now(), &entries);
  87 #endif
  88   if (rv != net::OK) {
  89     SendDataToClient("<script>onListingParsingError();</script>\n");
  90     return;
  91   }
  92   for (size_t i = 0; i < entries.size(); i++) {
  93     const FtpDirectoryListingEntry& entry = entries[i];
  94
  95     // Skip the current and parent directory entries in the listing. Our header
  96     // always includes them.
  97     if (base::EqualsASCII(entry.name, ".") ||
  98         base::EqualsASCII(entry.name, ".."))
  99       continue;
 100
 101     bool is_directory = (entry.type == FtpDirectoryListingEntry::DIRECTORY);
 102     int64 size = entry.size;
 103     if (entry.type != FtpDirectoryListingEntry::FILE)
 104       size = 0;
 105     SendDataToClient(net::GetDirectoryListingEntry(
 106         entry.name, entry.raw_name, is_directory, size, entry.last_modified));
 107   }
 108 }
 109
 110 void FtpDirectoryListingResponseDelegate::Init(const GURL& response_url) {
 111   net::UnescapeRule::Type unescape_rules = net::UnescapeRule::SPACES |
 112                                            net::UnescapeRule::URL_SPECIAL_CHARS;
 113   std::string unescaped_path = net::UnescapeURLComponent(response_url.path(),
 114                                                          unescape_rules);
 115   SendDataToClient(net::GetDirectoryListingHeader(
 116       ConvertPathToUTF16(unescaped_path)));
 117
 118   // If this isn't top level directory (i.e. the path isn't "/",)
 119   // add a link to the parent directory.
 120   if (response_url.path().length() > 1) {
 121     SendDataToClient(net::GetDirectoryListingEntry(
 122         base::ASCIIToUTF16(".."), std::string(), false, 0, base::Time()));
 123   }
 124 }
 125
 126 void FtpDirectoryListingResponseDelegate::SendDataToClient(
 127     const std::string& data) {
 128   if (client_)
 129     client_->didReceiveData(loader_, data.data(), data.length(), -1);
 130 }
 131
 132 }  // namespace content