当前位置：Gxlcms > PHP教程 > php下载获取远程图片函数(可伪造来路)

php下载获取远程图片函数(可伪造来路)

时间：2021-07-01 10:21:17 帮助过：9人阅读

  2. //下载获取远程图片
  3. function DownImageKeep($gurl, $rfurl, $filename, $gcookie="", $JumpCount=0, $maxtime=30)
  4. {
  5. $urlinfos = GetHostInfo($gurl);
  6. $ghost = trim($urlinfos['host']);
  7. if($ghost=='')
  8. {
  9. return FALSE;
  10. }
  11. $gquery = $urlinfos['query'];
  12. if($gcookie=="" && !empty($rfurl))
  13. {
  14. $gcookie = RefurlCookie($rfurl);
  15. }
  16. $sessionQuery = "GET $gquery HTTP/1.1\r\n";
  17. $sessionQuery .= "Host: $ghost\r\n";
  18. $sessionQuery .= "Referer: $rfurl\r\n";
  19. $sessionQuery .= "Accept: */*\r\n";
  20. $sessionQuery .= "User-Agent: Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)\r\n";
  21. if($gcookie!="" && !preg_match("/[\r\n]/", $gcookie))
  22. {
  23. $sessionQuery .= $gcookie."\r\n";
  24. }
  25. $sessionQuery .= "Connection: Keep-Alive\r\n\r\n";
  26. $errno = "";
  27. $errstr = "";
  28. $m_fp = fsockopen($ghost, 80, $errno, $errstr,10);
  29. fwrite($m_fp,$sessionQuery);
  30. $lnum = 0;
  32. //获取详细应答头
  33. $m_httphead = Array();
  34. $httpstas = explode(" ",fgets($m_fp,256));
  35. $m_httphead["http-edition"] = trim($httpstas[0]);
  36. $m_httphead["http-state"] = trim($httpstas[1]);
  37. while(!feof($m_fp))
  38. {
  39. $line = trim(fgets($m_fp,256));
  40. if($line == "" || $lnum>100)
  41. {
  42. break;
  43. }
  44. $hkey = "";
  45. $hvalue = "";
  46. $v = 0;
  47. for($i=0; $i {
  48. if($v==1)
  49. {
  50. $hvalue .= $line[$i];
  51. }
  52. if($line[$i]==":")
  53. {
  54. $v = 1;
  55. }
  56. if($v==0)
  57. {
  58. $hkey .= $line[$i];
  59. }
  60. }
  61. $hkey = trim($hkey);
  62. if($hkey!="")
  63. {
  64. $m_httphead[strtolower($hkey)] = trim($hvalue);
  65. }
  66. }
  68. //分析返回记录
  69. if(preg_match("/^3/", $m_httphead["http-state"]))
  70. {
  71. if(isset($m_httphead["location"]) && $JumpCount<3)
  72. {
  73. $JumpCount++;
  74. DownImageKeep($gurl,$rfurl,$filename,$gcookie,$JumpCount);
  75. }
  76. else
  77. {
  78. return FALSE;
  79. }
  80. }
  81. if(!preg_match("/^2/", $m_httphead["http-state"]))
  82. {
  83. return FALSE;
  84. }
  85. if(!isset($m_httphead))
  86. {
  87. return FALSE;
  88. }
  89. $contentLength = $m_httphead['content-length'];
  91. //保存文件
  92. $fp = fopen($filename,"w") or die("写入文件：{$filename} 失败！");
  93. $i=0;
  94. $okdata = "";
  95. $starttime = time();
  96. while(!feof($m_fp))
  97. {
  98. $okdata .= fgetc($m_fp);
  99. $i++;
  101. //超时结束
  102. if(time()-$starttime>$maxtime)
  103. {
  104. break;
  105. }
  107. //到达指定大小结束
  108. if($i >= $contentLength)
  109. {
  110. break;
  111. }
  112. }
  113. if($okdata!="")
  114. {
  115. fwrite($fp,$okdata);
  116. }
  117. fclose($fp);
  118. if($okdata=="")
  119. {
  120. @unlink($filename);
  121. fclose($m_fp);
  122. return FALSE;
  123. }
  124. fclose($m_fp);
  125. return TRUE;
  126. }
  128. /**
  129. * 获得某页面返回的Cookie信息
  130. *
  131. * @access public
  132. * @param string $gurl 调整地址
  133. * @return string
  134. */
  135. function RefurlCookie($gurl)
  136. {
  137. global $gcookie,$lastRfurl;
  138. $gurl = trim($gurl);
  139. if(!empty($gcookie) && $lastRfurl==$gurl)
  140. {
  141. return $gcookie;
  142. }
  143. else
  144. {
  145. $lastRfurl=$gurl;
  146. }
  147. if(trim($gurl)=='')
  148. {
  149. return '';
  150. }
  151. $urlinfos = GetHostInfo($gurl);
  152. $ghost = $urlinfos['host'];
  153. $gquery = $urlinfos['query'];
  154. $sessionQuery = "GET $gquery HTTP/1.1\r\n";
  155. $sessionQuery .= "Host: $ghost\r\n";
  156. $sessionQuery .= "Accept: */*\r\n";
  157. $sessionQuery .= "User-Agent: Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)\r\n";
  158. $sessionQuery .= "Connection: Close\r\n\r\n";
  159. $errno = "";
  160. $errstr = "";
  161. $m_fp = fsockopen($ghost, 80, $errno, $errstr,10) or die($ghost.'
    ');
  162. fwrite($m_fp,$sessionQuery);
  163. $lnum = 0;
  165. //获取详细应答头
  166. $gcookie = "";
  167. while(!feof($m_fp))
  168. {
  169. $line = trim(fgets($m_fp,256));
  170. if($line == "" || $lnum>100)
  171. {
  172. break;
  173. }
  174. else
  175. {
  176. if(preg_match("/^cookie/i", $line))
  177. {
  178. $gcookie = $line;
  179. break;
  180. }
  181. }
  182. }
  183. fclose($m_fp);
  184. return $gcookie;
  185. }
  187. /**
  188. * 获得网址的host和query部份
  189. *
  190. * @access public
  191. * @param string $gurl 调整地址
  192. * @return string
  193. */
  194. function GetHostInfo($gurl)
  195. {
  196. $gurl = preg_replace("/^http:\/\//i", "", trim($gurl));
  197. $garr['host'] = preg_replace("/\/(.*)$/i", "", $gurl);
  198. $garr['query'] = "/".preg_replace("/^([^\/]*)\//i", "", $gurl);
  199. return $garr;
  200. }
  201. ?>

人气教程排行

本站所有资源全部来源于网络，若本站发布的内容侵害到您的隐私或者利益，请联系我们删除！