《C# 爬虫 破境之道》：第一境 爬虫原理 — 第三节：WebResponse
2021-01-20 04:14
标签：parameter 重点 run text object 支持 认证 nat rac 第二节中，我们介绍了WebRequest，它可以帮助我们发送一个请求，不过正所谓“来而不往非礼也”，对方收到我们的请求，不给点回复，貌似不太合适（不过，还真有脸皮厚的：P）。 接下来，就重点研究一下，我们收到的回复，是个什么样的东东 [Code 1.3.1] 相比较WebRequest而言，WebResponse简单许多，这里就不再分解片断讲解了。有事儿说事儿，不要以貌取人：D 首先，与WebRequest的类似，它还是抽象类，两个构造函数的结构，一票子虚属性，大部分都是只读的，和一票子虚方法。 其次，与WebRequest不同，它继承了System.IDisposable接口，提醒我们啊，用完了，要释放啊~~~~~~ 几个属性 [Code 1.3.2] 重要的属性有Headers、ContentType、ContentLength。对于分析数据都是举足轻重的。 几个方法 [Code 1.3.3] 重要的方法有GetResponseStream、Close。对于获取数据至关重要。 总而言之，WebResponse还是比较简单的，给我们留下的坑不多。与WebRequest的讲解一样，干嚼无味，还是在实例中体会个中滋味吧：P 《C# 爬虫 破境之道》：第一境 爬虫原理 — 第三节：WebResponse 标签：parameter 重点 run text object 支持 认证 nat rac 原文地址：https://www.cnblogs.com/mikecheers/p/12144431.html
1 //
2 // Summary:
3 // Provides a response from a Uniform Resource Identifier (URI). This is an abstract
4 // class.
5 public abstract class WebResponse : MarshalByRefObject, ISerializable, IDisposable
6 {
7 //
8 // Summary:
9 // Initializes a new instance of the System.Net.WebResponse class.
10 protected WebResponse();
11 //
12 // Summary:
13 // Initializes a new instance of the System.Net.WebResponse class from the specified
14 // instances of the System.Runtime.Serialization.SerializationInfo and System.Runtime.Serialization.StreamingContext
15 // classes.
16 //
17 // Parameters:
18 // serializationInfo:
19 // An instance of the System.Runtime.Serialization.SerializationInfo class that
20 // contains the information required to serialize the new System.Net.WebRequest
21 // instance.
22 //
23 // streamingContext:
24 // An instance of the System.Runtime.Serialization.StreamingContext class that indicates
25 // the source of the serialized stream that is associated with the new System.Net.WebRequest
26 // instance.
27 //
28 // Exceptions:
29 // T:System.NotSupportedException:
30 // Any attempt is made to access the constructor, when the constructor is not overridden
31 // in a descendant class.
32 protected WebResponse(SerializationInfo serializationInfo, StreamingContext streamingContext);
33
34 //
35 // Summary:
36 // Gets a System.Boolean value that indicates whether this response was obtained
37 // from the cache.
38 //
39 // Returns:
40 // true if the response was taken from the cache; otherwise, false.
41 public virtual bool IsFromCache { get; }
42 //
43 // Summary:
44 // Gets a System.Boolean value that indicates whether mutual authentication occurred.
45 //
46 // Returns:
47 // true if both client and server were authenticated; otherwise, false.
48 public virtual bool IsMutuallyAuthenticated { get; }
49 //
50 // Summary:
51 // When overridden in a descendant class, gets or sets the content length of data
52 // being received.
53 //
54 // Returns:
55 // The number of bytes returned from the Internet resource.
56 //
57 // Exceptions:
58 // T:System.NotSupportedException:
59 // Any attempt is made to get or set the property, when the property is not overridden
60 // in a descendant class.
61 public virtual long ContentLength { get; set; }
62 //
63 // Summary:
64 // When overridden in a derived class, gets or sets the content type of the data
65 // being received.
66 //
67 // Returns:
68 // A string that contains the content type of the response.
69 //
70 // Exceptions:
71 // T:System.NotSupportedException:
72 // Any attempt is made to get or set the property, when the property is not overridden
73 // in a descendant class.
74 public virtual string ContentType { get; set; }
75 //
76 // Summary:
77 // When overridden in a derived class, gets the URI of the Internet resource that
78 // actually responded to the request.
79 //
80 // Returns:
81 // An instance of the System.Uri class that contains the URI of the Internet resource
82 // that actually responded to the request.
83 //
84 // Exceptions:
85 // T:System.NotSupportedException:
86 // Any attempt is made to get or set the property, when the property is not overridden
87 // in a descendant class.
88 public virtual Uri ResponseUri { get; }
89 //
90 // Summary:
91 // When overridden in a derived class, gets a collection of header name-value pairs
92 // associated with this request.
93 //
94 // Returns:
95 // An instance of the System.Net.WebHeaderCollection class that contains header
96 // values associated with this response.
97 //
98 // Exceptions:
99 // T:System.NotSupportedException:
100 // Any attempt is made to get or set the property, when the property is not overridden
101 // in a descendant class.
102 public virtual WebHeaderCollection Headers { get; }
103 //
104 // Summary:
105 // Gets a value that indicates if headers are supported.
106 //
107 // Returns:
108 // Returns System.Boolean. true if headers are supported; otherwise, false.
109 public virtual bool SupportsHeaders { get; }
110
111 //
112 // Summary:
113 // When overridden by a descendant class, closes the response stream.
114 //
115 // Exceptions:
116 // T:System.NotSupportedException:
117 // Any attempt is made to access the method, when the method is not overridden in
118 // a descendant class.
119 public virtual void Close();
120 //
121 // Summary:
122 // Releases the unmanaged resources used by the System.Net.WebResponse object.
123 public void Dispose();
124 //
125 // Summary:
126 // When overridden in a descendant class, returns the data stream from the Internet
127 // resource.
128 //
129 // Returns:
130 // An instance of the System.IO.Stream class for reading data from the Internet
131 // resource.
132 //
133 // Exceptions:
134 // T:System.NotSupportedException:
135 // Any attempt is made to access the method, when the method is not overridden in
136 // a descendant class.
137 public virtual Stream GetResponseStream();
138 //
139 // Summary:
140 // Releases the unmanaged resources used by the System.Net.WebResponse object, and
141 // optionally disposes of the managed resources.
142 //
143 // Parameters:
144 // disposing:
145 // true to release both managed and unmanaged resources; false to releases only
146 // unmanaged resources.
147 protected virtual void Dispose(bool disposing);
148 //
149 // Summary:
150 // Populates a System.Runtime.Serialization.SerializationInfo with the data that
151 // is needed to serialize the target object.
152 //
153 // Parameters:
154 // serializationInfo:
155 // The System.Runtime.Serialization.SerializationInfo to populate with data.
156 //
157 // streamingContext:
158 // A System.Runtime.Serialization.StreamingContext that specifies the destination
159 // for this serialization.
160 protected virtual void GetObjectData(SerializationInfo serializationInfo, StreamingContext streamingContext);
161 }
1 ///
1 ///
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