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php下载远程图片函数示例(伪造来路)

时间：2021-07-01 10:21:17 帮助过：35人阅读

  2. /**
  3. * @功能：下载远程图片
  4. * @ bbs.it-home.org
  5. */
  6. function DownImageKeep($gurl, $rfurl, $filename, $gcookie="", $JumpCount=0, $maxtime=30)
  7. {
  8. $urlinfos = GetHostInfo($gurl);
  9. $ghost = trim($urlinfos['host']);
  10. if($ghost=='')
  11. {
  12. return FALSE;
  13. }
  14. $gquery = $urlinfos['query'];
  15. if($gcookie=="" && !empty($rfurl))
  16. {
  17. $gcookie = RefurlCookie($rfurl);
  18. }
  19. $sessionQuery = "GET $gquery HTTP/1.1\r\n";
  20. $sessionQuery .= "Host: $ghost\r\n";
  21. $sessionQuery .= "Referer: $rfurl\r\n";
  22. $sessionQuery .= "Accept: */*\r\n";
  23. $sessionQuery .= "User-Agent: Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)\r\n";
  24. if($gcookie!="" && !preg_match("/[\r\n]/", $gcookie))
  25. {
  26. $sessionQuery .= $gcookie."\r\n";
  27. }
  28. $sessionQuery .= "Connection: Keep-Alive\r\n\r\n";
  29. $errno = "";
  30. $errstr = "";
  31. $m_fp = fsockopen($ghost, 80, $errno, $errstr,10);
  32. fwrite($m_fp,$sessionQuery);
  33. $lnum = 0;
  35. //获取详细应答头
  36. $m_httphead = Array();
  37. $httpstas = explode(" ",fgets($m_fp,256));
  38. $m_httphead["http-edition"] = trim($httpstas[0]);
  39. $m_httphead["http-state"] = trim($httpstas[1]);
  40. while(!feof($m_fp))
  41. {
  42. $line = trim(fgets($m_fp,256));
  43. if($line == "" || $lnum>100)
  44. {
  45. break;
  46. }
  47. $hkey = "";
  48. $hvalue = "";
  49. $v = 0;
  50. for($i=0; $i {
  51. if($v==1)
  52. {
  53. $hvalue .= $line[$i];
  54. }
  55. if($line[$i]==":")
  56. {
  57. $v = 1;
  58. }
  59. if($v==0)
  60. {
  61. $hkey .= $line[$i];
  62. }
  63. }
  64. $hkey = trim($hkey);
  65. if($hkey!="")
  66. {
  67. $m_httphead[strtolower($hkey)] = trim($hvalue);
  68. }
  69. }
  71. //分析返回记录
  72. if(preg_match("/^3/", $m_httphead["http-state"]))
  73. {
  74. if(isset($m_httphead["location"]) && $JumpCount<3)
  75. {
  76. $JumpCount++;
  77. DownImageKeep($gurl,$rfurl,$filename,$gcookie,$JumpCount);
  78. }
  79. else
  80. {
  81. return FALSE;
  82. }
  83. }
  84. if(!preg_match("/^2/", $m_httphead["http-state"]))
  85. {
  86. return FALSE;
  87. }
  88. if(!isset($m_httphead))
  89. {
  90. return FALSE;
  91. }
  92. $contentLength = $m_httphead['content-length'];
  94. //保存文件
  95. $fp = fopen($filename,"w") or die("写入文件：{$filename} 失败！");
  96. $i=0;
  97. $okdata = "";
  98. $starttime = time();
  99. while(!feof($m_fp))
  100. {
  101. $okdata .= fgetc($m_fp);
  102. $i++;
  104. //超时结束
  105. if(time()-$starttime>$maxtime)
  106. {
  107. break;
  108. }
  110. //到达指定大小结束
  111. if($i >= $contentLength)
  112. {
  113. break;
  114. }
  115. }
  116. if($okdata!="")
  117. {
  118. fwrite($fp,$okdata);
  119. }
  120. fclose($fp);
  121. if($okdata=="")
  122. {
  123. @unlink($filename);
  124. fclose($m_fp);
  125. return FALSE;
  126. }
  127. fclose($m_fp);
  128. return TRUE;
  129. }
  131. /**
  132. * 获得某页面返回的Cookie信息
  133. *
  134. * @access public
  135. * @param string $gurl 调整地址
  136. * @return string
  137. */
  138. function RefurlCookie($gurl)
  139. {
  140. global $gcookie,$lastRfurl;
  141. $gurl = trim($gurl);
  142. if(!empty($gcookie) && $lastRfurl==$gurl)
  143. {
  144. return $gcookie;
  145. }
  146. else
  147. {
  148. $lastRfurl=$gurl;
  149. }
  150. if(trim($gurl)=='')
  151. {
  152. return '';
  153. }
  154. $urlinfos = GetHostInfo($gurl);
  155. $ghost = $urlinfos['host'];
  156. $gquery = $urlinfos['query'];
  157. $sessionQuery = "GET $gquery HTTP/1.1\r\n";
  158. $sessionQuery .= "Host: $ghost\r\n";
  159. $sessionQuery .= "Accept: */*\r\n";
  160. $sessionQuery .= "User-Agent: Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)\r\n";
  161. $sessionQuery .= "Connection: Close\r\n\r\n";
  162. $errno = "";
  163. $errstr = "";
  164. $m_fp = fsockopen($ghost, 80, $errno, $errstr,10) or die($ghost.'
    ');
  165. fwrite($m_fp,$sessionQuery);
  166. $lnum = 0;
  168. //获取详细应答头
  169. $gcookie = "";
  170. while(!feof($m_fp))
  171. {
  172. $line = trim(fgets($m_fp,256));
  173. if($line == "" || $lnum>100)
  174. {
  175. break;
  176. }
  177. else
  178. {
  179. if(preg_match("/^cookie/i", $line))
  180. {
  181. $gcookie = $line;
  182. break;
  183. }
  184. }
  185. }
  186. fclose($m_fp);
  187. return $gcookie;
  188. }
  190. /**
  191. * 获得网址的host和query部份
  192. *
  193. * @access public
  194. * @param string $gurl 调整地址
  195. * @return string
  196. */
  197. function GetHostInfo($gurl)
  198. {
  199. $gurl = preg_replace("/^http:\/\//i", "", trim($gurl));
  200. $garr['host'] = preg_replace("/\/(.*)$/i", "", $gurl);
  201. $garr['query'] = "/".preg_replace("/^([^\/]*)\//i", "", $gurl);
  202. return $garr;
  203. }
  204. ?>

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