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      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 "webkit/glue/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/string_util.h"
     13 #include "base/sys_string_conversions.h"
     14 #include "base/utf_string_conversions.h"
     15 #include "base/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/Source/WebKit/chromium/public/WebURL.h"
     21 #include "third_party/WebKit/Source/WebKit/chromium/public/WebURLLoaderClient.h"
     22 
     23 using net::FtpDirectoryListingEntry;
     24 
     25 using WebKit::WebURLLoader;
     26 using WebKit::WebURLLoaderClient;
     27 using WebKit::WebURLResponse;
     28 
     29 namespace {
     30 
     31 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 (IsStringUTF8(path))
     35     return 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     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 WideToUTF16Hack(base::SysNativeMBToWide(path));
     51 }
     52 
     53 }  // namespace
     54 
     55 namespace webkit_glue {
     56 
     57 FtpDirectoryListingResponseDelegate::FtpDirectoryListingResponseDelegate(
     58     WebURLLoaderClient* client,
     59     WebURLLoader* loader,
     60     const WebURLResponse& response)
     61     : client_(client),
     62       loader_(loader) {
     63   Init(response.url());
     64 }
     65 
     66 void FtpDirectoryListingResponseDelegate::OnReceivedData(const char* data,
     67                                                          int data_len) {
     68   buffer_.append(data, data_len);
     69 }
     70 
     71 void FtpDirectoryListingResponseDelegate::OnCompletedRequest() {
     72   std::vector<FtpDirectoryListingEntry> entries;
     73   int rv = net::ParseFtpDirectoryListing(buffer_, base::Time::Now(), &entries);
     74   if (rv != net::OK) {
     75     SendDataToClient("<script>onListingParsingError();</script>\n");
     76     return;
     77   }
     78   for (size_t i = 0; i < entries.size(); i++) {
     79     FtpDirectoryListingEntry entry = entries[i];
     80 
     81     // Skip the current and parent directory entries in the listing. Our header
     82     // always includes them.
     83     if (EqualsASCII(entry.name, ".") || EqualsASCII(entry.name, ".."))
     84       continue;
     85 
     86     bool is_directory = (entry.type == FtpDirectoryListingEntry::DIRECTORY);
     87     int64 size = entry.size;
     88     if (entry.type != FtpDirectoryListingEntry::FILE)
     89       size = 0;
     90     SendDataToClient(net::GetDirectoryListingEntry(
     91         entry.name, entry.raw_name, is_directory, size, entry.last_modified));
     92   }
     93 }
     94 
     95 void FtpDirectoryListingResponseDelegate::Init(const GURL& response_url) {
     96   UnescapeRule::Type unescape_rules = UnescapeRule::SPACES |
     97                                       UnescapeRule::URL_SPECIAL_CHARS;
     98   std::string unescaped_path = UnescapeURLComponent(response_url.path(),
     99                                                     unescape_rules);
    100   SendDataToClient(net::GetDirectoryListingHeader(
    101                        ConvertPathToUTF16(unescaped_path)));
    102 
    103   // If this isn't top level directory (i.e. the path isn't "/",)
    104   // add a link to the parent directory.
    105   if (response_url.path().length() > 1) {
    106     SendDataToClient(net::GetDirectoryListingEntry(
    107         ASCIIToUTF16(".."), std::string(), false, 0, base::Time()));
    108   }
    109 }
    110 
    111 void FtpDirectoryListingResponseDelegate::SendDataToClient(
    112     const std::string& data) {
    113   client_->didReceiveData(loader_, data.data(), data.length(), -1);
    114 }
    115 
    116 }  // namespace webkit_glue
    117