httpClient 带验证码登录实现

「爱情、让人受尽委屈。」 2022-09-30 13:52 348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

  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;
  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;
  18. public class __10086 {
  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. }
  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. }
  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. }
  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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