亿牛云 Logo亿牛云

C# 爬虫代理示例

阅读模式

代码示例说明

  1. 代码样例不能直接运行，请替换成您自己的代理信息。
  2. 在不同编程语言的代码示例中，需注意其环境版本。
  3. 示例代码使用遇到问题请，我们会为您提供技术支持。

request

1


2
// 要访问的目标页面

3
string targetUrl = "http://httpbin.org/ip";

4


5


6
// 代理服务器(产品官网 www.16yun.cn)

7
string proxyHost = "http://t.16yun.cn";

8
string proxyPort = "31111";

9


10
// 代理验证信息

11
string proxyUser = "username";

12
string proxyPass = "password";

13


14
// 设置代理服务器

15
WebProxy proxy = new WebProxy(string.Format("{0}:{1}", proxyHost, proxyPort), true);

16


17


18
ServicePointManager.Expect100Continue = false;

19


20
var request = WebRequest.Create(targetUrl) as HttpWebRequest;

21


22
request.AllowAutoRedirect = true;

23
request.KeepAlive = true;

24
request.Method    = "GET";

25
request.Proxy     = proxy;

26


27
//request.Proxy.Credentials = CredentialCache.DefaultCredentials;

28
    

29
request.Proxy.Credentials = new System.Net.NetworkCredential(proxyUser, proxyPass);

30
    

31
// 设置Proxy Tunnel

32
// Random ran=new Random();

33
// int tunnel =ran.Next(1,10000);

34
// request.Headers.Add("Proxy-Tunnel", String.valueOf(tunnel));

35


36


37
//request.Timeout = 20000;

38
//request.ServicePoint.ConnectionLimit = 512;

39
//request.UserAgent = "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.82 Safari/537.36";

40
//request.Headers.Add("Cache-Control", "max-age=0");

41
//request.Headers.Add("DNT", "1");

42


43
    

44
//String encoded = System.Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes(proxyUser + ":" + proxyPass));

45
//request.Headers.Add("Proxy-Authorization", "Basic " + encoded);

46


47
using (var response = request.GetResponse() as HttpWebResponse)

48
using (var sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8))

49
{

50
    string htmlStr = sr.ReadToEnd();

51
}

NOTE

如果出现服务器提交协议冲突 Section=ResponseStatusLine 异常

通过修改配置文件解决：在app.config(WinForm)或web.config(Web)文件里修改。

WinForm下的app.config默认不存在，手动在Debug文件夹所在的同级目录下新建一个XML配置文件，内容为：

1
<?xml version="1.0" encoding="utf-8" ?>

2
<configuration>

3
  <system.net>

4
      <settings>

5
          <httpWebRequest  useUnsafeHeaderParsing= "true "  />

6
      </settings>

7
    </system.net>

8
</configuration>

编译以后会在Debug下面自动创建一个 程序名.exe.config 的配置文件

JavaPHP