1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
//
// HeaderInfo.cs
//
// Authors:
// Marek Safar <marek.safar@gmail.com>
//
// Copyright (C) 2011, 2014 Xamarin Inc (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Diagnostics;
using System.Collections.Generic;
namespace System.Net.Http.Headers
{
delegate bool TryParseDelegate<T> (string value, out T result);
delegate bool TryParseListDelegate<T> (string value, int minimalCount, out List<T> result);
abstract class HeaderInfo
{
class HeaderTypeInfo<T, U> : HeaderInfo where U : class
{
readonly TryParseDelegate<T> parser;
public HeaderTypeInfo (string name, TryParseDelegate<T> parser, HttpHeaderKind headerKind)
: base (name, headerKind)
{
this.parser = parser;
}
public override void AddToCollection (object collection, object value)
{
Debug.Assert (AllowsMany);
var c = (HttpHeaderValueCollection<U>) collection;
var list = value as List<U>;
if (list != null)
c.AddRange (list);
else
c.Add ((U) value);
}
protected override object CreateCollection (HttpHeaders headers, HeaderInfo headerInfo)
{
return new HttpHeaderValueCollection<U> (headers, headerInfo);
}
public override List<string> ToStringCollection (object collection)
{
if (collection == null)
return null;
var c = (HttpHeaderValueCollection<U>) collection;
if (c.Count == 0)
return null;
var list = new List<string> ();
foreach (var item in c) {
list.Add (item.ToString ());
}
return list;
}
public override bool TryParse (string value, out object result)
{
T tresult;
bool b = parser (value, out tresult);
result = tresult;
return b;
}
}
class CollectionHeaderTypeInfo<T, U> : HeaderTypeInfo<T, U> where U : class
{
readonly int minimalCount;
TryParseListDelegate<T> parser;
public CollectionHeaderTypeInfo (string name, TryParseListDelegate<T> parser, HttpHeaderKind headerKind, int minimalCount)
: base (name, null, headerKind)
{
this.parser = parser;
this.minimalCount = minimalCount;
AllowsMany = true;
}
public override bool TryParse (string value, out object result)
{
List<T> tresult;
if (!parser (value, minimalCount, out tresult)) {
result = null;
return false;
}
result = tresult;
return true;
}
}
public bool AllowsMany;
public readonly HttpHeaderKind HeaderKind;
public readonly string Name;
protected HeaderInfo (string name, HttpHeaderKind headerKind)
{
this.Name = name;
this.HeaderKind = headerKind;
}
public static HeaderInfo CreateSingle<T> (string name, TryParseDelegate<T> parser, HttpHeaderKind headerKind)
{
return new HeaderTypeInfo<T, object> (name, parser, headerKind);
}
//
// Headers with #rule for defining lists of elements or *rule for defining occurences of elements
//
public static HeaderInfo CreateMulti<T> (string name, TryParseListDelegate<T> elementParser, HttpHeaderKind headerKind, int minimalCount = 1) where T : class
{
return new CollectionHeaderTypeInfo<T, T> (name, elementParser, headerKind, minimalCount);
}
public object CreateCollection (HttpHeaders headers)
{
return CreateCollection (headers, this);
}
public abstract void AddToCollection (object collection, object value);
protected abstract object CreateCollection (HttpHeaders headers, HeaderInfo headerInfo);
public abstract List<string> ToStringCollection (object collection);
public abstract bool TryParse (string value, out object result);
}
}
|
