httpClient 带验证码登录实现

「爱情、让人受尽委屈。」 2022-09-30 13:52 286阅读 0赞

在实现之前，需要注意一个问题。关于Cookie，如果能很好跟踪上到Cookie，基本上，实现都是小事一碟。   
在网络上，有提到过验证码老是提示有错。貌似思路流程都是正确的。兄弟，如果你在半个小时还没搞清楚，先休息一下，听听歌，打打游戏。再想过。   
推断为什么会出现这种问题。问题是你登录验证码页面(jsp,aspx)，实际上就是一个会话或者Cookie记录。此时，你有去连接登录页面，有可能已经重新生成一个新的验证码啦。你用了之前的验证码，指定会提示验证码错误。   
在这里，我只能说一下我遇到的这种问题的解决办法。如果还有其他情况，可以私下M我，我们继续过。   
一、抓取一个农业网站思路步骤如下：   
1、首先需要获取验证码页面，把它以图片的格式保证下来。（图片格式需要通过抓包的工具查看。如：httpWatch）并跟踪到的cookie保存下来。cookie必须要跟抓包工具看到的cookie一致。   
2、提交登录页面所需要的字段和验证码，字段尽可能全部提交上去。   
二、代码实现。

Java代码   ![收藏代码][icon_star.png]

1.  **import** java.io.BufferedReader;  
2.  **import** java.io.File;  
3.  **import** java.io.FileNotFoundException;  
4.  **import** java.io.FileOutputStream;  
5.  **import** java.io.IOException;  
6.  **import** java.io.InputStreamReader;  
7.    
8.  **import** org.apache.commons.httpclient.Cookie;  
9.  **import** org.apache.commons.httpclient.Header;  
10. **import** org.apache.commons.httpclient.HttpClient;  
11. **import** org.apache.commons.httpclient.HttpException;  
12. **import** org.apache.commons.httpclient.NameValuePair;  
13. **import** org.apache.commons.httpclient.cookie.CookiePolicy;  
14. **import** org.apache.commons.httpclient.methods.GetMethod;  
15. **import** org.apache.commons.httpclient.methods.PostMethod;  
16. **import** org.apache.commons.httpclient.params.DefaultHttpParams;  
17.   
18. **public** **class** \_\_10086 \{  
19.   
20.     **public** **void** test() **throws** HttpException, IOException\{  
21.         String url = "http://12582.10086.cn/user/login/verifycode.aspx";  
22.         HttpClient httpClient = **new** HttpClient();  
23.         DefaultHttpParams.getDefaultParams().setParameter("http.protocol.cookie-policy", CookiePolicy.BROWSER\_COMPATIBILITY);  
24.         GetMethod getMethod = **new** GetMethod("http://12582.10086.cn/user/login/verifycode.aspx");    
25.         getMethod.setRequestHeader("Host", "12582.10086.cn");  
26.         getMethod.setRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 5.2; rv:5.0.1) Gecko/20100101 Firefox/5.0.1");  
27.         getMethod.setRequestHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,\*/\*;q=0.8");  
28.         getMethod.setRequestHeader("Accept-Language", "zh-cn,zh;q=0.5");  
29.         getMethod.setRequestHeader("Accept-Charset", "GB2312,utf-8;q=0.7,\*;q=0.7");  
30.         getMethod.setRequestHeader("Connection", "keep-alive");  
31. //      getMethod.setRequestHeader("Cookie", "Hm\_lvt\_6e06bb5a029d6c5473951d1079638828=1328777184942; Hm\_lvt\_e64244e1e591d0337e17a12b714c0996=1328777186856; WT\_FPC=id=183.16.35.230-1530895312.30204303:lv=1328174810886:ss=1328174810886; ASP.NET\_SessionId=gj25p555exiqjd45kdcqoq55; BIGipServernxt-wz=369797312.20480.0000; Hm\_lpvt\_6e06bb5a029d6c5473951d1079638828=1328777184942; Hm\_lpvt\_e64244e1e591d0337e17a12b714c0996=1328777186856; .12582portals=4CF97704261E34DBE12913CBA18211005E960282A771D94FF3709BAFC99610A7397BE8293ADB2E876A0A7380AC4A158016419745F27511D6E79F82A408D009519D6DDFE18A578E5CFC5F48025C75B33B6EBD43953A7DB05AEBAAB856E0AA29112818B4910350AADACD2012F5DE56297B1F6622ED7F4959D31E19C474E48F7773D7966437");  
32.         getMethod.setRequestHeader("Cache-Control", "max-age=0");  
33.         **int** code = httpClient.executeMethod(getMethod);  
34.         Header header = getMethod.getResponseHeader("Set-cookie");   
35.         System.out.println(header.getValue());  
36.         String headerCookie = header.getValue();  
37.         String SessionId = headerCookie.substring(headerCookie.indexOf("NET\_SessionId=") + "NET\_SessionId=".length(), headerCookie.indexOf(";"));  
38.         System.out.println(SessionId);  
39.         String BIGipServernxt = headerCookie.substring(headerCookie.indexOf("BIGipServernxt-wz=") + "BIGipServernxt-wz=".length(), headerCookie.length());  
40.         BIGipServernxt = BIGipServernxt.substring(0, BIGipServernxt.indexOf(";"));  
41.         StringBuffer sb = **new** StringBuffer();  
42.         sb.append("Hm\_lvt\_6e06bb5a029d6c5473951d1079638828=1328778307106; ");  
43.         sb.append("Hm\_lvt\_e64244e1e591d0337e17a12b714c0996=1328778308090; ");  
44.         sb.append("WT\_FPC=id=183.16.35.230-1530895312.30204303:lv=1328174810886:ss=1328174810886; ");  
45.         sb.append("ASP.NET\_SessionId=").append(SessionId).append("; ");  
46.         sb.append("BIGipServernxt-wz=").append(BIGipServernxt).append("; ");  
47.         sb.append("Hm\_lpvt\_6e06bb5a029d6c5473951d1079638828=1328778307106; ");  
48.         sb.append("Hm\_lpvt\_e64244e1e591d0337e17a12b714c0996=1328778308090");  
49.         System.out.println(sb.toString());  
50.         String ValidCode = savegif(getMethod);  
51.         getMethod.releaseConnection();  
52.         // 第二次链接  
53.         httpClient.getHostConfiguration().setHost("12582.10086.cn", 80, "http");  
54.         PostMethod method = getPostMethod(ValidCode);  
55.         method.setRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 5.2; rv:5.0.1) Gecko/20100101 Firefox/5.0.1");  
56.         method.setRequestHeader("Host", "12582.10086.cn");  
57.         method.setRequestHeader("Accept", "application/json, text/javascript, \*/\*");  
58.         method.setRequestHeader("Accept-Language", "zh-cn,zh;q=0.5");  
59. //      method.setRequestHeader("Accept-Encoding", "gzip, deflate");  
60.         method.setRequestHeader("Accept-Charset", "GB2312,utf-8;q=0.7,\*;q=0.7");  
61.         method.setRequestHeader("Connection", "keep-alive");  
62.         method.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");  
63.         method.setRequestHeader("X-Requested-With", "XMLHttpRequest");  
64.         method.setRequestHeader("Referer", "http://12582.10086.cn/user/login/");  
65.         method.setRequestHeader("Cookie", sb.toString());   
66.         httpClient.executeMethod(method);  
67.         System.out.println(method.getStatusCode());  
68.         System.out.println(method.getResponseBodyAsString());  
69.         // 第三次链接  
70.         Header header1 = method.getResponseHeader("Set-cookie");   
71.         System.out.println("dd=" + header1.getValue());  
72.         sb.append("; " + header1.getValue());  
73.         Cookie\[\] cookies = httpClient.getState().getCookies();  
74.         method.releaseConnection();  
75.         String my = "http://12582.10086.cn/my";  
76.         System.out.println(sb.toString());  
77.         getMethod = **new** GetMethod(my);  
78.         getMethod.setRequestHeader("Host", "12582.10086.cn");  
79.         getMethod.setRequestHeader("User-Agent", "Mozilla/5.0 (Windows NT 5.2; rv:5.0.1) Gecko/20100101 Firefox/5.0.1");  
80.         getMethod.setRequestHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,\*/\*;q=0.8");  
81.         getMethod.setRequestHeader("Accept-Language", "zh-cn,zh;q=0.5");  
82.         getMethod.setRequestHeader("Accept-Charset", "GB2312,utf-8;q=0.7,\*;q=0.7");  
83.         getMethod.setRequestHeader("Connection", "keep-alive");  
84.         getMethod.setRequestHeader("Referer", "http://12582.10086.cn/user/login");  
85.         getMethod.setRequestHeader("Cookie", sb.toString());  
86.         code = httpClient.executeMethod(getMethod);  
87.         System.out.println(getMethod.getStatusCode());  
88.         System.out.println(getMethod.getResponseBodyAsString());  
89.         File storeFile = **new** File("c:/2008sohu.html");    
90.         FileOutputStream output = **new** FileOutputStream(storeFile);    
91.         //得到网络资源的字节数组,并写入文件    
92.         output.write(getMethod.getResponseBody());    
93.         output.close();   
94.     \}  
95.       
96.     **public** String savegif(GetMethod getMethod) **throws** IOException \{  
97.         File storeFile = **new** File("c:/2008sohu.gif");    
98.         FileOutputStream output = **new** FileOutputStream(storeFile);    
99.         //得到网络资源的字节数组,并写入文件    
100.         output.write(getMethod.getResponseBody());    
101.         output.close();    
102.         InputStreamReader is = **new** InputStreamReader(System.in);   
103.         BufferedReader br = **new** BufferedReader(is);  
104.         String ValidCode = "";  
105.         **try** \{  
106.             ValidCode = br.readLine();  
107.             br.close();  
108.             is.close();  
109.         \} **catch**(Exception e) \{  
110.             e.printStackTrace();  
111.         \}  
112.         **return** ValidCode;  
113.     \}  
114.       
115.     **private** PostMethod getPostMethod(String ValidCode) \{  
116.         PostMethod post = **new** PostMethod("/ajax/postlogin");  
117.         NameValuePair\[\] simcard = \{  
118.                 **new** NameValuePair("email", "XXX"),  
119.                 **new** NameValuePair("password", "XXX"),  
120.                 **new** NameValuePair("ValidCode", ValidCode),  
121.                 **new** NameValuePair("rme", "0"),  
122.                 \};  
123.         post.setRequestBody(simcard);  
124.         **return** post;  
125.     \}  
126.       
127.     **public** **static** **void** main(String args\[\]) \{  
128.         \_\_10086 \_10086 = **new** \_\_10086();  
129.         **try** \{  
130.             \_10086.test();  
131.         \} **catch** (HttpException e) \{  
132.             // TODO Auto-generated catch block  
133.             e.printStackTrace();  
134.         \} **catch** (IOException e) \{  
135.             // TODO Auto-generated catch block  
136.             e.printStackTrace();  
137.         \}  
138.     \}  
139. \}

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