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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2015, 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 /// A library for broadly-useful functions and regular expressions for scanning | 5 /// A library for broadly-useful functions and regular expressions for scanning |
6 /// HTTP entities. | 6 /// HTTP entities. |
7 /// | 7 /// |
8 /// Many of the regular expressions come from [section 2.2 of the HTTP | 8 /// Many of the regular expressions come from [section 2.2 of the HTTP |
9 /// spec][spec]. | 9 /// spec][spec]. |
10 /// | 10 /// |
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30 final whitespace = new RegExp("(?:${_lws.pattern})*"); | 30 final whitespace = new RegExp("(?:${_lws.pattern})*"); |
31 | 31 |
32 /// Parses a list of elements, as in `1#element` in the HTTP spec. | 32 /// Parses a list of elements, as in `1#element` in the HTTP spec. |
33 /// | 33 /// |
34 /// [scanner] is used to parse the elements, and [parseElement] is used to parse | 34 /// [scanner] is used to parse the elements, and [parseElement] is used to parse |
35 /// each one individually. The values returned by [parseElement] are collected | 35 /// each one individually. The values returned by [parseElement] are collected |
36 /// in a list and returned. | 36 /// in a list and returned. |
37 /// | 37 /// |
38 /// Once this is finished, [scanner] will be at the next non-LWS character in | 38 /// Once this is finished, [scanner] will be at the next non-LWS character in |
39 /// the string, or the end of the string. | 39 /// the string, or the end of the string. |
40 List parseList(StringScanner scanner, parseElement()) { | 40 List/*<T>*/ parseList/*<T>*/(StringScanner scanner, /*=T*/ parseElement()) { |
41 var result = []; | 41 var result = /*<T>*/[]; |
42 | 42 |
43 // Consume initial empty values. | 43 // Consume initial empty values. |
44 while (scanner.scan(",")) { | 44 while (scanner.scan(",")) { |
45 scanner.scan(whitespace); | 45 scanner.scan(whitespace); |
46 } | 46 } |
47 | 47 |
48 result.add(parseElement()); | 48 result.add(parseElement()); |
49 scanner.scan(whitespace); | 49 scanner.scan(whitespace); |
50 | 50 |
51 while (scanner.scan(",")) { | 51 while (scanner.scan(",")) { |
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66 /// If [name] is passed, it's used to describe the expected value if it's not | 66 /// If [name] is passed, it's used to describe the expected value if it's not |
67 /// found. | 67 /// found. |
68 String expectQuotedString(StringScanner scanner, {String name}) { | 68 String expectQuotedString(StringScanner scanner, {String name}) { |
69 if (name == null) name = "quoted string"; | 69 if (name == null) name = "quoted string"; |
70 scanner.expect(_quotedString, name: name); | 70 scanner.expect(_quotedString, name: name); |
71 var string = scanner.lastMatch[0]; | 71 var string = scanner.lastMatch[0]; |
72 return string | 72 return string |
73 .substring(1, string.length - 1) | 73 .substring(1, string.length - 1) |
74 .replaceAllMapped(_quotedPair, (match) => match[1]); | 74 .replaceAllMapped(_quotedPair, (match) => match[1]); |
75 } | 75 } |
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