rnystrom@google.com
0bc9b19740
Review URL: https://chromiumcodereview.appspot.com//10850034 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@10354 260f80e4-7a28-3924-810f-c04153c831b5
256 lines
8.7 KiB
Dart
256 lines
8.7 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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class _HttpUtils {
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static String decodeUrlEncodedString(String urlEncoded) {
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// First check the string for any encoding.
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int index = 0;
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bool encoded = false;
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while (!encoded && index < urlEncoded.length) {
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encoded = urlEncoded[index] == "+" || urlEncoded[index] == "%";
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index++;
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}
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if (!encoded) return urlEncoded;
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index--;
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// Start decoding from the first encoded character.
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List<int> bytes = new List<int>();
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for (int i = 0; i < index; i++) bytes.add(urlEncoded.charCodeAt(i));
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for (int i = index; i < urlEncoded.length; i++) {
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if (urlEncoded[i] == "+") {
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bytes.add(32);
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} else if (urlEncoded[i] == "%") {
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if (urlEncoded.length - i < 2) {
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throw new HttpException("Invalid URL encoding");
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}
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int byte = 0;
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for (int j = 0; j < 2; j++) {
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var charCode = urlEncoded.charCodeAt(i + j + 1);
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if (0x30 <= charCode && charCode <= 0x39) {
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byte = byte * 16 + charCode - 0x30;
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} else if (0x41 <= charCode && charCode <= 0x46) {
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byte = byte * 16 + charCode - 0x37;
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} else if (0x61 <= charCode && charCode <= 0x66) {
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byte = byte * 16 + charCode - 0x57;
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} else {
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throw new HttpException("Invalid URL encoding");
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}
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}
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bytes.add(byte);
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i += 2;
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} else {
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bytes.add(urlEncoded.charCodeAt(i));
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}
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}
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return decodeUtf8(bytes);
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}
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static Map<String, String> splitQueryString(String queryString) {
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Map<String, String> result = new Map<String, String>();
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int currentPosition = 0;
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while (currentPosition < queryString.length) {
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int position = queryString.indexOf("=", currentPosition);
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if (position == -1) {
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break;
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}
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String name = queryString.substring(currentPosition, position);
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currentPosition = position + 1;
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position = queryString.indexOf("&", currentPosition);
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String value;
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if (position == -1) {
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value = queryString.substring(currentPosition);
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currentPosition = queryString.length;
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} else {
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value = queryString.substring(currentPosition, position);
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currentPosition = position + 1;
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}
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result[_HttpUtils.decodeUrlEncodedString(name)] =
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_HttpUtils.decodeUrlEncodedString(value);
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}
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return result;
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}
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// From RFC 2616 section "3.3.1 Full Date"
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// HTTP-date = rfc1123-date | rfc850-date | asctime-date
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// rfc1123-date = wkday "," SP date1 SP time SP "GMT"
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// rfc850-date = weekday "," SP date2 SP time SP "GMT"
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// asctime-date = wkday SP date3 SP time SP 4DIGIT
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// date1 = 2DIGIT SP month SP 4DIGIT
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// ; day month year (e.g., 02 Jun 1982)
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// date2 = 2DIGIT "-" month "-" 2DIGIT
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// ; day-month-year (e.g., 02-Jun-82)
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// date3 = month SP ( 2DIGIT | ( SP 1DIGIT ))
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// ; month day (e.g., Jun 2)
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// time = 2DIGIT ":" 2DIGIT ":" 2DIGIT
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// ; 00:00:00 - 23:59:59
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// wkday = "Mon" | "Tue" | "Wed"
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// | "Thu" | "Fri" | "Sat" | "Sun"
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// weekday = "Monday" | "Tuesday" | "Wednesday"
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// | "Thursday" | "Friday" | "Saturday" | "Sunday"
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// month = "Jan" | "Feb" | "Mar" | "Apr"
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// | "May" | "Jun" | "Jul" | "Aug"
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// | "Sep" | "Oct" | "Nov" | "Dec"
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// Format as RFC 1123 date.
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static String formatDate(Date date) {
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List wkday = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"];
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List month = ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
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Date d = date.toUtc();
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StringBuffer sb = new StringBuffer();
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sb.add(wkday[d.weekday - 1]);
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sb.add(", ");
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sb.add(d.day.toString());
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sb.add(" ");
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sb.add(month[d.month - 1]);
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sb.add(" ");
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sb.add(d.year.toString());
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d.hour < 9 ? sb.add(" 0") : sb.add(" ");
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sb.add(d.hour.toString());
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d.minute < 9 ? sb.add(":0") : sb.add(":");
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sb.add(d.minute.toString());
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d.second < 9 ? sb.add(":0") : sb.add(":");
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sb.add(d.second.toString());
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sb.add(" GMT");
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return sb.toString();
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}
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static Date parseDate(String date, [bool strict = true]) {
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final int SP = 32;
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List wkdays = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"];
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List weekdays = ["Monday", "Tuesday", "Wednesday", "Thursday",
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"Friday", "Saturday", "Sunday"];
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List months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
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List wkdaysLowerCase = ["mon", "tue", "wed", "thu", "fri", "sat", "sun"];
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List weekdaysLowerCase = ["monday", "tuesday", "wednesday", "thursday",
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"friday", "saturday", "sunday"];
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List monthsLowerCase = ["jan", "feb", "mar", "apr", "may", "jun",
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"jul", "aug", "sep", "oct", "nov", "dec"];
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final int formatRfc1123 = 0;
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final int formatRfc850 = 1;
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final int formatAsctime = 2;
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int index = 0;
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String tmp;
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int format;
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void expect(String s) {
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if (date.length - index < s.length) {
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throw new HttpException("Invalid HTTP date $date");
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}
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String tmp = date.substring(index, index + s.length);
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if (strict) {
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if (tmp != s) {
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throw new HttpException("Invalid HTTP date $date");
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}
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} else {
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if (tmp.toLowerCase() != s.toLowerCase()) {
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throw new HttpException("Invalid HTTP date $date");
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}
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}
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index += s.length;
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}
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int expectWeekday() {
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int weekday;
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// The formatting of the weekday signals the format of the date string.
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int pos = date.indexOf(",", index);
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if (pos == -1) {
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int pos = date.indexOf(" ", index);
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if (pos == -1) throw new HttpException("Invalid HTTP date $date");
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tmp = date.substring(index, pos);
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index = pos + 1;
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weekday = strict ? wkdays.indexOf(tmp)
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: wkdaysLowerCase.indexOf(tmp.toLowerCase());
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if (weekday != -1) {
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format = formatAsctime;
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return weekday;
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}
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} else {
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tmp = date.substring(index, pos);
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index = pos + 1;
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weekday = strict ? wkdays.indexOf(tmp)
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: wkdaysLowerCase.indexOf(tmp.toLowerCase());
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if (weekday != -1) {
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format = formatRfc1123;
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return weekday;
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}
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weekday = strict ? weekdays.indexOf(tmp)
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: weekdaysLowerCase.indexOf(tmp.toLowerCase());
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if (weekday != -1) {
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format = formatRfc850;
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return weekday;
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}
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}
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throw new HttpException("Invalid HTTP date $date");
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}
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int expectMonth(String separator) {
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int pos = date.indexOf(separator, index);
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if (pos - index != 3) throw new HttpException("Invalid HTTP date $date");
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tmp = date.substring(index, pos);
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index = pos + 1;
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int month = strict ? months.indexOf(tmp)
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: monthsLowerCase.indexOf(tmp.toLowerCase());
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if (month != -1) return month;
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throw new HttpException("Invalid HTTP date $date");
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}
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int expectNum(String separator) {
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int pos;
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if (separator.length > 0) {
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pos = date.indexOf(separator, index);
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} else {
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pos = date.length;
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}
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String tmp = date.substring(index, pos);
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index = pos + separator.length;
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try {
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int value = Math.parseInt(tmp);
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return value;
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} catch (FormatException e) {
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throw new HttpException("Invalid HTTP date $date");
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}
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}
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void expectEnd() {
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if (index != date.length) {
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throw new HttpException("Invalid HTTP date $date");
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}
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}
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int weekday = expectWeekday();
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int day;
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int month;
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int year;
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int hours;
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int minutes;
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int seconds;
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if (format == formatAsctime) {
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month = expectMonth(" ");
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if (date.charCodeAt(index) == SP) index++;
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day = expectNum(" ");
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hours = expectNum(":");
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minutes = expectNum(":");
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seconds = expectNum(" ");
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year = expectNum("");
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} else {
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expect(" ");
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day = expectNum(format == formatRfc1123 ? " " : "-");
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month = expectMonth(format == formatRfc1123 ? " " : "-");
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year = expectNum(" ");
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hours = expectNum(":");
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minutes = expectNum(":");
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seconds = expectNum(" ");
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expect("GMT");
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}
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expectEnd();
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return new Date(
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year, month + 1, day, hours, minutes, seconds, 0, isUtc: true);
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}
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}
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