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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/ftp/ftp_directory_listing_parser.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/i18n/icu_encoding_detection.h"
#include "base/i18n/icu_string_conversions.h"
#include "base/stl_util.h"
#include "base/strings/string_util.h"
#include "base/strings/string_split.h"
#include "base/strings/utf_string_conversions.h"
#include "net/base/net_errors.h"
#include "net/ftp/ftp_directory_listing_parser_ls.h"
#include "net/ftp/ftp_directory_listing_parser_netware.h"
#include "net/ftp/ftp_directory_listing_parser_os2.h"
#include "net/ftp/ftp_directory_listing_parser_vms.h"
#include "net/ftp/ftp_directory_listing_parser_windows.h"
#include "net/ftp/ftp_server_type_histograms.h"
namespace net {
namespace {
// Fills in |raw_name| for all |entries| using |encoding|. Returns network
// error code.
int FillInRawName(const std::string& encoding,
std::vector<FtpDirectoryListingEntry>* entries) {
for (size_t i = 0; i < entries->size(); i++) {
if (!base::UTF16ToCodepage(entries->at(i).name, encoding.c_str(),
base::OnStringConversionError::FAIL,
&entries->at(i).raw_name)) {
return ERR_ENCODING_CONVERSION_FAILED;
}
}
return OK;
}
// Parses |text| as an FTP directory listing. Fills in |entries|
// and |server_type| and returns network error code.
int ParseListing(const base::string16& text,
const base::string16& newline_separator,
const std::string& encoding,
const base::Time& current_time,
std::vector<FtpDirectoryListingEntry>* entries,
FtpServerType* server_type) {
std::vector<base::string16> lines;
base::SplitStringUsingSubstr(text, newline_separator, &lines);
struct {
base::Callback<bool(void)> callback;
FtpServerType server_type;
} parsers[] = {
{
base::Bind(&ParseFtpDirectoryListingLs, lines, current_time, entries),
SERVER_LS
},
{
base::Bind(&ParseFtpDirectoryListingWindows, lines, entries),
SERVER_WINDOWS
},
{
base::Bind(&ParseFtpDirectoryListingVms, lines, entries),
SERVER_VMS
},
{
base::Bind(&ParseFtpDirectoryListingNetware,
lines, current_time, entries),
SERVER_NETWARE
},
{
base::Bind(&ParseFtpDirectoryListingOS2, lines, entries),
SERVER_OS2
}
};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(parsers); i++) {
entries->clear();
if (parsers[i].callback.Run()) {
*server_type = parsers[i].server_type;
return FillInRawName(encoding, entries);
}
}
entries->clear();
return ERR_UNRECOGNIZED_FTP_DIRECTORY_LISTING_FORMAT;
}
// Detects encoding of |text| and parses it as an FTP directory listing.
// Fills in |entries| and |server_type| and returns network error code.
int DecodeAndParse(const std::string& text,
const base::Time& current_time,
std::vector<FtpDirectoryListingEntry>* entries,
FtpServerType* server_type) {
const char* kNewlineSeparators[] = { "\n", "\r\n" };
std::vector<std::string> encodings;
if (!base::DetectAllEncodings(text, &encodings))
return ERR_ENCODING_DETECTION_FAILED;
// Use first encoding that can be used to decode the text.
for (size_t i = 0; i < encodings.size(); i++) {
base::string16 converted_text;
if (base::CodepageToUTF16(text,
encodings[i].c_str(),
base::OnStringConversionError::FAIL,
&converted_text)) {
for (size_t j = 0; j < arraysize(kNewlineSeparators); j++) {
int rv = ParseListing(converted_text,
ASCIIToUTF16(kNewlineSeparators[j]),
encodings[i],
current_time,
entries,
server_type);
if (rv == OK)
return rv;
}
}
}
entries->clear();
*server_type = SERVER_UNKNOWN;
return ERR_UNRECOGNIZED_FTP_DIRECTORY_LISTING_FORMAT;
}
} // namespace
FtpDirectoryListingEntry::FtpDirectoryListingEntry()
: type(UNKNOWN),
size(-1) {
}
int ParseFtpDirectoryListing(const std::string& text,
const base::Time& current_time,
std::vector<FtpDirectoryListingEntry>* entries) {
FtpServerType server_type = SERVER_UNKNOWN;
int rv = DecodeAndParse(text, current_time, entries, &server_type);
UpdateFtpServerTypeHistograms(server_type);
return rv;
}
} // namespace net
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