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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 library utils; | 5 library utils; |
6 | 6 |
7 import 'dart:async'; | 7 import 'dart:async'; |
8 import 'dart:crypto'; | 8 import 'dart:crypto'; |
9 import 'dart:io'; | 9 import 'dart:io'; |
10 import 'dart:typed_data'; | 10 import 'dart:typed_data'; |
11 import 'dart:uri'; | |
12 import 'dart:utf'; | 11 import 'dart:utf'; |
13 | 12 |
14 import 'byte_stream.dart'; | 13 import 'byte_stream.dart'; |
15 | 14 |
16 /// Converts a URL query string (or `application/x-www-form-urlencoded` body) | 15 /// Converts a URL query string (or `application/x-www-form-urlencoded` body) |
17 /// into a [Map] from parameter names to values. | 16 /// into a [Map] from parameter names to values. |
18 /// | 17 /// |
19 /// queryToMap("foo=bar&baz=bang&qux"); | 18 /// queryToMap("foo=bar&baz=bang&qux"); |
20 /// //=> {"foo": "bar", "baz": "bang", "qux": ""} | 19 /// //=> {"foo": "bar", "baz": "bang", "qux": ""} |
21 Map<String, String> queryToMap(String queryList) { | 20 Map<String, String> queryToMap(String queryList) { |
22 var map = {}; | 21 var map = {}; |
23 for (var pair in queryList.split("&")) { | 22 for (var pair in queryList.split("&")) { |
24 var split = split1(pair, "="); | 23 var split = split1(pair, "="); |
25 if (split.isEmpty) continue; | 24 if (split.isEmpty) continue; |
26 var key = urlDecode(split[0]); | 25 var key = urlDecode(split[0]); |
27 var value = urlDecode(split.length > 1 ? split[1] : ""); | 26 var value = urlDecode(split.length > 1 ? split[1] : ""); |
28 map[key] = value; | 27 map[key] = value; |
29 } | 28 } |
30 return map; | 29 return map; |
31 } | 30 } |
32 | 31 |
33 /// Converts a [Map] from parameter names to values to a URL query string. | 32 /// Converts a [Map] from parameter names to values to a URL query string. |
34 /// | 33 /// |
35 /// mapToQuery({"foo": "bar", "baz": "bang"}); | 34 /// mapToQuery({"foo": "bar", "baz": "bang"}); |
36 /// //=> "foo=bar&baz=bang" | 35 /// //=> "foo=bar&baz=bang" |
37 String mapToQuery(Map<String, String> map) { | 36 String mapToQuery(Map<String, String> map) { |
38 var pairs = <List<String>>[]; | 37 var pairs = <List<String>>[]; |
39 map.forEach((key, value) => | 38 map.forEach((key, value) => |
40 pairs.add([encodeUriComponent(key), encodeUriComponent(value)])); | 39 pairs.add([Uri.encodeQueryComponent(key), |
| 40 Uri.encodeQueryComponent(value)])); |
41 return pairs.map((pair) => "${pair[0]}=${pair[1]}").join("&"); | 41 return pairs.map((pair) => "${pair[0]}=${pair[1]}").join("&"); |
42 } | 42 } |
43 | 43 |
44 /// Adds all key/value pairs from [source] to [destination], overwriting any | 44 /// Adds all key/value pairs from [source] to [destination], overwriting any |
45 /// pre-existing values. | 45 /// pre-existing values. |
46 /// | 46 /// |
47 /// var a = {"foo": "bar", "baz": "bang"}; | 47 /// var a = {"foo": "bar", "baz": "bang"}; |
48 /// mapAddAll(a, {"baz": "zap", "qux": "quux"}); | 48 /// mapAddAll(a, {"baz": "zap", "qux": "quux"}); |
49 /// a; //=> {"foo": "bar", "baz": "zap", "qux": "quux"} | 49 /// a; //=> {"foo": "bar", "baz": "zap", "qux": "quux"} |
50 void mapAddAll(Map destination, Map source) => | 50 void mapAddAll(Map destination, Map source) => |
51 source.forEach((key, value) => destination[key] = value); | 51 source.forEach((key, value) => destination[key] = value); |
52 | 52 |
53 /// Decodes a URL-encoded string. Unlike [decodeUriComponent], this includes | 53 /// Decodes a URL-encoded string. Unlike [Uri.decodeComponent], this includes |
54 /// replacing `+` with ` `. | 54 /// replacing `+` with ` `. |
55 String urlDecode(String encoded) => | 55 String urlDecode(String encoded) => |
56 decodeUriComponent(encoded.replaceAll("+", " ")); | 56 Uri.decodeComponent(encoded.replaceAll("+", " ")); |
57 | 57 |
58 /// Like [String.split], but only splits on the first occurrence of the pattern. | 58 /// Like [String.split], but only splits on the first occurrence of the pattern. |
59 /// This will always return an array of two elements or fewer. | 59 /// This will always return an array of two elements or fewer. |
60 /// | 60 /// |
61 /// split1("foo,bar,baz", ","); //=> ["foo", "bar,baz"] | 61 /// split1("foo,bar,baz", ","); //=> ["foo", "bar,baz"] |
62 /// split1("foo", ","); //=> ["foo"] | 62 /// split1("foo", ","); //=> ["foo"] |
63 /// split1("", ","); //=> [] | 63 /// split1("", ","); //=> [] |
64 List<String> split1(String toSplit, String pattern) { | 64 List<String> split1(String toSplit, String pattern) { |
65 if (toSplit.isEmpty) return <String>[]; | 65 if (toSplit.isEmpty) return <String>[]; |
66 | 66 |
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232 /// The return values of all [Future]s are discarded. Any errors will cause the | 232 /// The return values of all [Future]s are discarded. Any errors will cause the |
233 /// iteration to stop and will be piped through the return value. | 233 /// iteration to stop and will be piped through the return value. |
234 Future forEachFuture(Iterable input, Future fn(element)) { | 234 Future forEachFuture(Iterable input, Future fn(element)) { |
235 var iterator = input.iterator; | 235 var iterator = input.iterator; |
236 Future nextElement(_) { | 236 Future nextElement(_) { |
237 if (!iterator.moveNext()) return new Future.value(); | 237 if (!iterator.moveNext()) return new Future.value(); |
238 return fn(iterator.current).then(nextElement); | 238 return fn(iterator.current).then(nextElement); |
239 } | 239 } |
240 return nextElement(null); | 240 return nextElement(null); |
241 } | 241 } |
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