// 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_util.h"
#include <vector>
#include "base/i18n/char_iterator.h"
#include "base/logging.h"
#include "base/string_number_conversions.h"
#include "base/string_tokenizer.h"
#include "base/string_util.h"
#include "base/time.h"
#include "base/utf_string_conversions.h"
#include "unicode/datefmt.h"
#include "unicode/dtfmtsym.h"
#include "unicode/uchar.h"
// For examples of Unix<->VMS path conversions, see the unit test file. On VMS
// a path looks differently depending on whether it's a file or directory.
namespace net {
// static
std::string FtpUtil::UnixFilePathToVMS(const std::string& unix_path) {
if (unix_path.empty())
return std::string();
StringTokenizer tokenizer(unix_path, "/");
std::vector<std::string> tokens;
while (tokenizer.GetNext())
tokens.push_back(tokenizer.token());
if (unix_path[0] == '/') {
// It's an absolute path.
if (tokens.empty()) {
DCHECK_EQ(1U, unix_path.length());
return "[]";
}
if (tokens.size() == 1)
return unix_path.substr(1); // Drop the leading slash.
std::string result(tokens[0] + ":[");
if (tokens.size() == 2) {
// Don't ask why, it just works that way on VMS.
result.append("000000");
} else {
result.append(tokens[1]);
for (size_t i = 2; i < tokens.size() - 1; i++)
result.append("." + tokens[i]);
}
result.append("]" + tokens[tokens.size() - 1]);
return result;
}
if (tokens.size() == 1)
return unix_path;
std::string result("[");
for (size_t i = 0; i < tokens.size() - 1; i++)
result.append("." + tokens[i]);
result.append("]" + tokens[tokens.size() - 1]);
return result;
}
// static
std::string FtpUtil::UnixDirectoryPathToVMS(const std::string& unix_path) {
if (unix_path.empty())
return std::string();
std::string path(unix_path);
if (path[path.length() - 1] != '/')
path.append("/");
// Reuse logic from UnixFilePathToVMS by appending a fake file name to the
// real path and removing it after conversion.
path.append("x");
path = UnixFilePathToVMS(path);
return path.substr(0, path.length() - 1);
}
// static
std::string FtpUtil::VMSPathToUnix(const std::string& vms_path) {
if (vms_path.empty())
return ".";
if (vms_path == "[]")
return "/";
std::string result(vms_path);
if (vms_path[0] == '[') {
// It's a relative path.
ReplaceFirstSubstringAfterOffset(&result, 0, "[.", "");
} else {
// It's an absolute path.
result.insert(0, "/");
ReplaceSubstringsAfterOffset(&result, 0, ":[000000]", "/");
ReplaceSubstringsAfterOffset(&result, 0, ":[", "/");
}
std::replace(result.begin(), result.end(), '.', '/');
std::replace(result.begin(), result.end(), ']', '/');
// Make sure the result doesn't end with a slash.
if (result.length() && result[result.length() - 1] == '/')
result = result.substr(0, result.length() - 1);
return result;
}
// static
bool FtpUtil::AbbreviatedMonthToNumber(const string16& text, int* number) {
icu::UnicodeString unicode_text(text.data(), text.size());
int32_t locales_count;
const icu::Locale* locales =
icu::DateFormat::getAvailableLocales(locales_count);
// Some FTP servers localize the date listings. To guess the locale,
// we loop over all available ones.
for (int32_t locale = 0; locale < locales_count; locale++) {
UErrorCode status(U_ZERO_ERROR);
icu::DateFormatSymbols format_symbols(locales[locale], status);
// If we cannot get format symbols for some locale, it's not a fatal error.
// Just try another one.
if (U_FAILURE(status))
continue;
int32_t months_count;
const icu::UnicodeString* months =
format_symbols.getShortMonths(months_count);
// Loop over all abbreviated month names in given locale.
// An alternative solution (to parse |text| in given locale) is more
// lenient, and may accept more than we want even with setLenient(false).
for (int32_t month = 0; month < months_count; month++) {
// Compare (case-insensitive), but just first three characters. Sometimes
// ICU returns longer strings (for example for Russian locale), and in FTP
// listings they are abbreviated to just three characters.
// Note: ICU may also return strings shorter than three characters,
// and those also should be accepted.
if (months[month].caseCompare(0, 3, unicode_text, 0) == 0) {
*number = month + 1;
return true;
}
}
}
return false;
}
// static
bool FtpUtil::LsDateListingToTime(const string16& month, const string16& day,
const string16& rest,
const base::Time& current_time,
base::Time* result) {
base::Time::Exploded time_exploded = { 0 };
if (!AbbreviatedMonthToNumber(month, &time_exploded.month))
return false;
if (!base::StringToInt(day, &time_exploded.day_of_month))
return false;
if (time_exploded.day_of_month > 31)
return false;
if (!base::StringToInt(rest, &time_exploded.year)) {
// Maybe it's time. Does it look like time (HH:MM)?
if (rest.length() == 5 && rest[2] == ':') {
if (!base::StringToInt(rest.begin(),
rest.begin() + 2,
&time_exploded.hour))
return false;
if (!base::StringToInt(rest.begin() + 3,
rest.begin() + 5,
&time_exploded.minute))
return false;
} else if (rest.length() == 4 && rest[1] == ':') {
// Sometimes it's just H:MM.
if (!base::StringToInt(rest.begin(),
rest.begin() + 1,
&time_exploded.hour))
return false;
if (!base::StringToInt(rest.begin() + 2,
rest.begin() + 4,
&time_exploded.minute))
return false;
} else {
return false;
}
// Guess the year.
base::Time::Exploded current_exploded;
current_time.LocalExplode(¤t_exploded);
// If it's not possible for the parsed date to be in the current year,
// use the previous year.
if (time_exploded.month > current_exploded.month ||
(time_exploded.month == current_exploded.month &&
time_exploded.day_of_month > current_exploded.day_of_month)) {
time_exploded.year = current_exploded.year - 1;
} else {
time_exploded.year = current_exploded.year;
}
}
// We don't know the time zone of the listing, so just use local time.
*result = base::Time::FromLocalExploded(time_exploded);
return true;
}
// static
string16 FtpUtil::GetStringPartAfterColumns(const string16& text, int columns) {
base::i18n::UTF16CharIterator iter(&text);
// TODO(jshin): Is u_isspace the right function to use here?
for (int i = 0; i < columns; i++) {
// Skip the leading whitespace.
while (!iter.end() && u_isspace(iter.get()))
iter.Advance();
// Skip the actual text of i-th column.
while (!iter.end() && !u_isspace(iter.get()))
iter.Advance();
}
string16 result(text.substr(iter.array_pos()));
TrimWhitespace(result, TRIM_ALL, &result);
return result;
}
} // namespace