C# 操作http协议学习总结下

框架，否则将不能使用

httpclient

3.

实现代码

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border- box;

string=

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string=

border- box;

string=

border- box;

string=

using System;

using c;

using

using

using

using

using rExpressions;

using

namespace ClassLibrary1

{

public class Class1

{

private static String dir = @

///

///

写文件到本地

///

///

///

public static void Write(string fileName, string html)

{

try

{

FileStream fs = new FileStream(dir + fileName, FileMode.C

reate);

StreamWriter sw = new StreamWriter(fs, t);

(html);

();

();

}catch(Exception ex){

ine(race);

}

}

///

///

写文件到本地

///

///

///

public static void Write(string fileName, byte[] html)

{

try

{

llBytes(dir + fileName, html);

}

catch (Exception ex)

{

ine(race);

}

}

///

///

登录博客园

///

public static void LoginCnblogs()

{

HttpClient httpClient = new HttpClient();

ponseContentBufferSize = 256000;

(

la/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML,

like Gecko) Chrome/36.0.1985.143 Safari/537.36

String url =

HttpResponseMessage response = nc(new Ur

i(url)).Result;

String result = StringAsync().Resu

lt;

String username =

String password =

密码

do

{

String __EVENTVALIDATION = new Regex(

ION

String __VIEWSTATE = new Regex(

String LBD_VCID_c_login_logincaptcha = new Regex(

< br>D_VCID_c_login_logincaptcha

ult).Grou ps[1].Value;

//

图片验证码

url =

ogin_logincaptcha_Capt chaImage

sult).Groups[1].Value;

response = nc(new Uri(url)).Result;

Write(

().Result);

ine(

输入图片验证码：

String imgCode =

验证码写到本地了，需要手动填写

imgCode = ne();

//

开始登录

url =

List> paramList = new List>();

(new KeyValuePair(

(new KeyValuePair(

(new KeyValuePair(

E));

(new KeyValuePair(

NTVALIDATION));

(new KeyValuePair(

(new KeyValuePair(

(new KeyValuePair(

tcha

(new KeyVal uePair(

n_logincaptcha

(new KeyValuePair(

ode));

(new KeyValuePair(

登

录

(new KeyValuePair(

/

response = ync(new Uri(url), new FormUrl

EncodedCon tent(paramList)).Result;

result = StringAsync().Result;

Write(

} while (ns(

验证码错误，麻烦您重新输入

ine(

登录成功！

//

用完要记得释放

e();

}

public static void Main()

{

LoginCnblogs();

}

}

代码分析：

首先，从

Main

函数开始，调用

L oginCnblogs

方法；

其次 ，使用

GET

方法：

HttpResponseMessage response = nc(new Ur

i(url)).Result;

String result = StringAsync().Res

ult;

再者，使用

POST

方法：

List> paramList = new List>();

(new KeyValuePair(

RGET

....

response = ync(new Uri(u

rl), new FormUrlEncodedContent(paramList)).Result;

result = StringAsy

nc().Result;

rgb(51, 51, 51); font-family:

Arial,

YaHei

FreeSans,

Arimo,

Sans

micro

hei

Sans

GB

Sans

GB

W3

FontAwesome,

sans-serif;

font-size: 16px; font-style: normal; font-variant-ligatures: normal;

font-variant-caps:

normal;

font-weight:

normal;

letter-spacing:

normal;

orphans: 2; text- align: start; text-indent: 0px; text-transform: none;

white-space: normal; widows: 2; word-spacing: 0px;

-webkit-text-stroke- width: 0px; background-color: rgb(255, 255,

255);

border- box;

最后，

注意其返回值可以是

string

，

也可以是

byte[],

和

stream

的方式，

这里

看你需要什么吧。

4.

登录成功后的截图

1).

使用浏览器登录后的截图：

< /p>

2).

使用

Httpcliet