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
|
//-----------------------------------------------------------------------
// <copyright file="NetworkDirectWebResponse.cs" company="Andrew Arnott">
// Copyright (c) Andrew Arnott. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.Messaging {
using System;
using System.Diagnostics;
using System.Diagnostics.Contracts;
using System.IO;
using System.Net;
using System.Text;
/// <summary>
/// A live network HTTP response
/// </summary>
[DebuggerDisplay("{Status} {ContentType.MediaType}")]
[ContractVerification(true)]
internal class NetworkDirectWebResponse : IncomingWebResponse, IDisposable {
/// <summary>
/// The network response object, used to initialize this instance, that still needs
/// to be closed if applicable.
/// </summary>
private HttpWebResponse httpWebResponse;
/// <summary>
/// The incoming network response stream.
/// </summary>
private Stream responseStream;
/// <summary>
/// A value indicating whether a stream reader has already been
/// created on this instance.
/// </summary>
private bool streamReadBegun;
/// <summary>
/// Initializes a new instance of the <see cref="NetworkDirectWebResponse"/> class.
/// </summary>
/// <param name="requestUri">The request URI.</param>
/// <param name="response">The response.</param>
internal NetworkDirectWebResponse(Uri requestUri, HttpWebResponse response)
: base(requestUri, response) {
Requires.NotNull(requestUri, "requestUri");
Requires.NotNull(response, "response");
this.httpWebResponse = response;
this.responseStream = response.GetResponseStream();
}
/// <summary>
/// Gets the body of the HTTP response.
/// </summary>
public override Stream ResponseStream {
get { return this.responseStream; }
}
/// <summary>
/// Creates a text reader for the response stream.
/// </summary>
/// <returns>The text reader, initialized for the proper encoding.</returns>
public override StreamReader GetResponseReader() {
this.streamReadBegun = true;
if (this.responseStream == null) {
throw new ObjectDisposedException(GetType().Name);
}
string contentEncoding = this.Headers[HttpResponseHeader.ContentEncoding];
if (string.IsNullOrEmpty(contentEncoding)) {
return new StreamReader(this.ResponseStream);
} else {
return new StreamReader(this.ResponseStream, Encoding.GetEncoding(contentEncoding));
}
}
/// <summary>
/// Gets an offline snapshot version of this instance.
/// </summary>
/// <param name="maximumBytesToCache">The maximum bytes from the response stream to cache.</param>
/// <returns>A snapshot version of this instance.</returns>
/// <remarks>
/// If this instance is a <see cref="NetworkDirectWebResponse"/> creating a snapshot
/// will automatically close and dispose of the underlying response stream.
/// If this instance is a <see cref="CachedDirectWebResponse"/>, the result will
/// be the self same instance.
/// </remarks>
internal override CachedDirectWebResponse GetSnapshot(int maximumBytesToCache) {
ErrorUtilities.VerifyOperation(!this.streamReadBegun, "Network stream reading has already begun.");
ErrorUtilities.VerifyOperation(this.httpWebResponse != null, "httpWebResponse != null");
this.streamReadBegun = true;
var result = new CachedDirectWebResponse(this.RequestUri, this.httpWebResponse, maximumBytesToCache);
this.Dispose();
return result;
}
/// <summary>
/// Releases unmanaged and - optionally - managed resources
/// </summary>
/// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected override void Dispose(bool disposing) {
if (disposing) {
if (this.responseStream != null) {
this.responseStream.Dispose();
this.responseStream = null;
}
if (this.httpWebResponse != null) {
this.httpWebResponse.Close();
this.httpWebResponse = null;
}
}
base.Dispose(disposing);
}
}
}
|
