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.
5 #include "net/ftp/ftp_util.h"
10 #include "base/i18n/case_conversion.h"
11 #include "base/i18n/char_iterator.h"
12 #include "base/logging.h"
13 #include "base/memory/singleton.h"
14 #include "base/strings/string_number_conversions.h"
15 #include "base/strings/string_piece.h"
16 #include "base/strings/string_split.h"
17 #include "base/strings/string_tokenizer.h"
18 #include "base/strings/string_util.h"
19 #include "base/strings/utf_string_conversions.h"
20 #include "base/time/time.h"
21 #include "third_party/icu/source/common/unicode/uchar.h"
22 #include "third_party/icu/source/i18n/unicode/datefmt.h"
23 #include "third_party/icu/source/i18n/unicode/dtfmtsym.h"
25 using base::StringPiece16;
27 // For examples of Unix<->VMS path conversions, see the unit test file. On VMS
28 // a path looks differently depending on whether it's a file or directory.
33 std::string FtpUtil::UnixFilePathToVMS(const std::string& unix_path) {
34 if (unix_path.empty())
37 base::StringTokenizer tokenizer(unix_path, "/");
38 std::vector<std::string> tokens;
39 while (tokenizer.GetNext())
40 tokens.push_back(tokenizer.token());
42 if (unix_path[0] == '/') {
43 // It's an absolute path.
46 DCHECK_EQ(1U, unix_path.length());
50 if (tokens.size() == 1)
51 return unix_path.substr(1); // Drop the leading slash.
53 std::string result(tokens[0] + ":[");
54 if (tokens.size() == 2) {
55 // Don't ask why, it just works that way on VMS.
56 result.append("000000");
58 result.append(tokens[1]);
59 for (size_t i = 2; i < tokens.size() - 1; i++)
60 result.append("." + tokens[i]);
62 result.append("]" + tokens[tokens.size() - 1]);
66 if (tokens.size() == 1)
69 std::string result("[");
70 for (size_t i = 0; i < tokens.size() - 1; i++)
71 result.append("." + tokens[i]);
72 result.append("]" + tokens[tokens.size() - 1]);
77 std::string FtpUtil::UnixDirectoryPathToVMS(const std::string& unix_path) {
78 if (unix_path.empty())
81 std::string path(unix_path);
83 if (path[path.length() - 1] != '/')
86 // Reuse logic from UnixFilePathToVMS by appending a fake file name to the
87 // real path and removing it after conversion.
89 path = UnixFilePathToVMS(path);
90 return path.substr(0, path.length() - 1);
94 std::string FtpUtil::VMSPathToUnix(const std::string& vms_path) {
98 if (vms_path[0] == '/') {
99 // This is not really a VMS path. Most likely the server is emulating UNIX.
100 // Return path as-is.
104 if (vms_path == "[]")
107 std::string result(vms_path);
108 if (vms_path[0] == '[') {
109 // It's a relative path.
110 ReplaceFirstSubstringAfterOffset(&result, 0, "[.", std::string());
112 // It's an absolute path.
113 result.insert(0, "/");
114 ReplaceSubstringsAfterOffset(&result, 0, ":[000000]", "/");
115 ReplaceSubstringsAfterOffset(&result, 0, ":[", "/");
117 std::replace(result.begin(), result.end(), '.', '/');
118 std::replace(result.begin(), result.end(), ']', '/');
120 // Make sure the result doesn't end with a slash.
121 if (result.length() && result[result.length() - 1] == '/')
122 result = result.substr(0, result.length() - 1);
129 // Lazy-initialized map of abbreviated month names.
130 class AbbreviatedMonthsMap {
132 static AbbreviatedMonthsMap* GetInstance() {
133 return Singleton<AbbreviatedMonthsMap>::get();
136 // Converts abbreviated month name |text| to its number (in range 1-12).
137 // On success returns true and puts the number in |number|.
138 bool GetMonthNumber(const base::string16& text, int* number) {
139 // Ignore the case of the month names. The simplest way to handle that
140 // is to make everything lowercase.
141 base::string16 text_lower(base::i18n::ToLower(text));
143 if (map_.find(text_lower) == map_.end())
146 *number = map_[text_lower];
151 friend struct DefaultSingletonTraits<AbbreviatedMonthsMap>;
153 // Constructor, initializes the map based on ICU data. It is much faster
154 // to do that just once.
155 AbbreviatedMonthsMap() {
156 int32_t locales_count;
157 const icu::Locale* locales =
158 icu::DateFormat::getAvailableLocales(locales_count);
160 for (int32_t locale = 0; locale < locales_count; locale++) {
161 UErrorCode status(U_ZERO_ERROR);
163 icu::DateFormatSymbols format_symbols(locales[locale], status);
165 // If we cannot get format symbols for some locale, it's not a fatal
166 // error. Just try another one.
167 if (U_FAILURE(status))
170 int32_t months_count;
171 const icu::UnicodeString* months =
172 format_symbols.getShortMonths(months_count);
174 for (int32_t month = 0; month < months_count; month++) {
175 base::string16 month_name(months[month].getBuffer(),
176 static_cast<size_t>(months[month].length()));
178 // Ignore the case of the month names. The simplest way to handle that
179 // is to make everything lowercase.
180 month_name = base::i18n::ToLower(month_name);
182 map_[month_name] = month + 1;
184 // Sometimes ICU returns longer strings, but in FTP listings a shorter
185 // abbreviation is used (for example for the Russian locale). Make sure
186 // we always have a map entry for a three-letter abbreviation.
187 map_[month_name.substr(0, 3)] = month + 1;
191 // Fail loudly if the data returned by ICU is obviously incomplete.
192 // This is intended to catch cases like http://crbug.com/177428
193 // much earlier. Note that the issue above turned out to be non-trivial
194 // to reproduce - crash data is much better indicator of a problem
195 // than incomplete bug reports.
196 CHECK_EQ(1, map_[ASCIIToUTF16("jan")]);
197 CHECK_EQ(2, map_[ASCIIToUTF16("feb")]);
198 CHECK_EQ(3, map_[ASCIIToUTF16("mar")]);
199 CHECK_EQ(4, map_[ASCIIToUTF16("apr")]);
200 CHECK_EQ(5, map_[ASCIIToUTF16("may")]);
201 CHECK_EQ(6, map_[ASCIIToUTF16("jun")]);
202 CHECK_EQ(7, map_[ASCIIToUTF16("jul")]);
203 CHECK_EQ(8, map_[ASCIIToUTF16("aug")]);
204 CHECK_EQ(9, map_[ASCIIToUTF16("sep")]);
205 CHECK_EQ(10, map_[ASCIIToUTF16("oct")]);
206 CHECK_EQ(11, map_[ASCIIToUTF16("nov")]);
207 CHECK_EQ(12, map_[ASCIIToUTF16("dec")]);
210 // Maps lowercase month names to numbers in range 1-12.
211 std::map<base::string16, int> map_;
213 DISALLOW_COPY_AND_ASSIGN(AbbreviatedMonthsMap);
219 bool FtpUtil::AbbreviatedMonthToNumber(const base::string16& text,
221 return AbbreviatedMonthsMap::GetInstance()->GetMonthNumber(text, number);
225 bool FtpUtil::LsDateListingToTime(const base::string16& month,
226 const base::string16& day,
227 const base::string16& rest,
228 const base::Time& current_time,
229 base::Time* result) {
230 base::Time::Exploded time_exploded = { 0 };
232 if (!AbbreviatedMonthToNumber(month, &time_exploded.month)) {
233 // Work around garbage sent by some servers in the same column
234 // as the month. Take just last 3 characters of the string.
235 if (month.length() < 3 ||
236 !AbbreviatedMonthToNumber(month.substr(month.length() - 3),
237 &time_exploded.month)) {
242 if (!base::StringToInt(day, &time_exploded.day_of_month))
244 if (time_exploded.day_of_month > 31)
247 if (!base::StringToInt(rest, &time_exploded.year)) {
248 // Maybe it's time. Does it look like time? Note that it can be any of
249 // "HH:MM", "H:MM", "HH:M" or maybe even "H:M".
250 if (rest.length() > 5)
253 size_t colon_pos = rest.find(':');
254 if (colon_pos == string16::npos)
259 if (!base::StringToInt(
260 StringPiece16(rest.begin(), rest.begin() + colon_pos),
261 &time_exploded.hour)) {
264 if (!base::StringToInt(
265 StringPiece16(rest.begin() + colon_pos + 1, rest.end()),
266 &time_exploded.minute)) {
271 base::Time::Exploded current_exploded;
272 current_time.LocalExplode(¤t_exploded);
274 // If it's not possible for the parsed date to be in the current year,
275 // use the previous year.
276 if (time_exploded.month > current_exploded.month ||
277 (time_exploded.month == current_exploded.month &&
278 time_exploded.day_of_month > current_exploded.day_of_month)) {
279 time_exploded.year = current_exploded.year - 1;
281 time_exploded.year = current_exploded.year;
285 // We don't know the time zone of the listing, so just use local time.
286 *result = base::Time::FromLocalExploded(time_exploded);
291 bool FtpUtil::WindowsDateListingToTime(const base::string16& date,
292 const base::string16& time,
293 base::Time* result) {
294 base::Time::Exploded time_exploded = { 0 };
296 // Date should be in format MM-DD-YY[YY].
297 std::vector<base::string16> date_parts;
298 base::SplitString(date, '-', &date_parts);
299 if (date_parts.size() != 3)
301 if (!base::StringToInt(date_parts[0], &time_exploded.month))
303 if (!base::StringToInt(date_parts[1], &time_exploded.day_of_month))
305 if (!base::StringToInt(date_parts[2], &time_exploded.year))
307 if (time_exploded.year < 0)
309 // If year has only two digits then assume that 00-79 is 2000-2079,
310 // and 80-99 is 1980-1999.
311 if (time_exploded.year < 80)
312 time_exploded.year += 2000;
313 else if (time_exploded.year < 100)
314 time_exploded.year += 1900;
316 // Time should be in format HH:MM[(AM|PM)]
317 if (time.length() < 5)
320 std::vector<base::string16> time_parts;
321 base::SplitString(time.substr(0, 5), ':', &time_parts);
322 if (time_parts.size() != 2)
324 if (!base::StringToInt(time_parts[0], &time_exploded.hour))
326 if (!base::StringToInt(time_parts[1], &time_exploded.minute))
328 if (!time_exploded.HasValidValues())
331 if (time.length() > 5) {
332 if (time.length() != 7)
334 base::string16 am_or_pm(time.substr(5, 2));
335 if (EqualsASCII(am_or_pm, "PM")) {
336 if (time_exploded.hour < 12)
337 time_exploded.hour += 12;
338 } else if (EqualsASCII(am_or_pm, "AM")) {
339 if (time_exploded.hour == 12)
340 time_exploded.hour = 0;
346 // We don't know the time zone of the server, so just use local time.
347 *result = base::Time::FromLocalExploded(time_exploded);
352 base::string16 FtpUtil::GetStringPartAfterColumns(const base::string16& text,
354 base::i18n::UTF16CharIterator iter(&text);
356 // TODO(jshin): Is u_isspace the right function to use here?
357 for (int i = 0; i < columns; i++) {
358 // Skip the leading whitespace.
359 while (!iter.end() && u_isspace(iter.get()))
362 // Skip the actual text of i-th column.
363 while (!iter.end() && !u_isspace(iter.get()))
367 base::string16 result(text.substr(iter.array_pos()));
368 TrimWhitespace(result, TRIM_ALL, &result);