curl 模拟用户登陆,但有验证码
我在用curl做一个用户模拟登陆,但是遇到了验证码。我在网上找了很多资料,但都没有解决问题。我想,要模拟登录的思路大概是这样子的:
1、获取页面中的表单,模拟填写登录名和密码;
2、从验证码图片中得到验证码,模拟填写验证码;(这一步获取验证码解决不了)
3、提交cookie和参数进行登录,保存本地cookie;
其中第2步遇到了问题,怎么会的验证码?使用图片识别库吗?还是下载让用户手工输入呢?或者还有其他的办法?
希望做过这类需求的朋友帮帮忙,谢谢~
回复内容:
我在用curl做一个用户模拟登陆,但是遇到了验证码。我在网上找了很多资料,但都没有解决问题。我想,要模拟登录的思路大概是这样子的:
1、获取页面中的表单,模拟填写登录名和密码;
2、从验证码图片中得到验证码,模拟填写验证码;(这一步获取验证码解决不了)
3、提交cookie和参数进行登录,保存本地cookie;
其中第2步遇到了问题,怎么会的验证码?使用图片识别库吗?还是下载让用户手工输入呢?或者还有其他的办法?
希望做过这类需求的朋友帮帮忙,谢谢~
火速解答
- 手工输入
- 花钱买在线的api在线打码
- ocr(不准确,简单的验证码可以,但总体上指望不大)
你可以去 www.uuwise.com 这样的网站,去了解一下验证码打码的黑技术
- 如果手工打码,用PHP带Cookie取到验证码的值,再设
Header("Content-Type: image/jpeg");
吐出来, 这里你可以自己结合前端做些小的改善,例如用Ajax Long Poll或webSocket做个实时提醒的小东西,一旦产生新验证码,你的客户端叮咚提示你打验证码,打完,把内容传给CURL类,CURL再模拟你把验证码传给网站。 在PHP中这里有个很强悍的模拟库,叫做snoopy.class.php
。 - 如果验证码比较简单(无扭曲、无干扰线、非中文、字符长度是定长、每个验证码字符边界距离等同、噪点小、字体不生僻或你能找到),也就是说,你觉得机器可以根据一定模式识别出来,那么自己用PHP写个OCR,或调用扩展,我不知道有没有OCR扩展你自己找找。自己写也简单,我记得是先把图片二值化,再把每个字母的区域拆分,计算黑色所占比例,和已有字体库对比,网上类似教程太多,自己实践。
http://blog.csdn.net/ugg/article/details/3972368
http://jingyan.baidu.com/article/456c463b66e5320a583144b7.html
http://www.poboke.com/study/php-verification-code-identification-primary.html

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