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? ??? ?? PHP ???? ??? ??? ????? ???? PHP ???? ?? ?? ???

??? ??? ????? ???? PHP ???? ?? ?? ???

Jul 25, 2016 am 08:44 AM
斷點續(xù)傳, PHP

PHP ???? ?? ?? ???, ??? ?? ???? ??, ???? ?? ?? ??? ???? ????. ????? ?? HTTP ????? ???? ??? ???????. HTTP1.1 ????? ??? ?? ? ??? ????? ?? ???? ???. ??? ??? ??? ?? ? feof? ???? ?? ??? ? ????. ??? ??? ?? ??? ?????? ?????.

  1. /**
  2. * ?? ?? ????? ??? ??? ?????
  3. */
  4. class HttpDownload {
  5. private $m_url = "";
  6. private $m_urlpath = "";
  7. ?? $m_scheme = "http";
  8. ?? $m_host = "";
  9. ?? $m_port = "80";
  10. ?? $m_user = "";
  11. ?? $ m_pass = "";
  12. ??? $m_path = "/";
  13. ??? $m_query = "";
  14. ??? $m_fp = "";
  15. ??? $m_error = "";
  16. ??? $m_httphead = "" ;
  17. ??? $m_html = "";
  19. /**
  20. * ???
  21. */
  22. ?? ?? PrivateInit($url){
  23. $urls = "";
  24. $urls = @parse_url($url);
  25. $this->m_url = $url;
  26. if(is_array($urls)) {
  27. $this->m_host = $urls ["???"];
  28. if(!empty($urls["scheme"])) $this->m_scheme = $urls["scheme"];
  29. if(!empty($urls[" user"])) $this->m_user = $urls["user"];
  30. if(!empty($urls["pass"])) $this->m_pass = $urls["pass" ];
  31. if(!empty($urls["port"])) $this->m_port = $urls["port"];
  32. if(!empty($urls["path"]) ) $this->m_path = $urls["path"];
  33. $this->m_urlpath = $this->m_path;
  34. if(!empty($urls["query"])) {
  35. $this->m_query = $urls["query"];
  36. $this->m_urlpath .= "?".$this->m_query;
  37. }
  38. }
  39. }
  41. /**
  42. * ??? URL? ???
  43. */
  44. function OpenUrl($url) {
  45. # 重設各參數(shù)
  46. $this->m_url = "";
  47. $this->m_urlpath = "";
  48. $this->m_scheme = "http";
  49. $this->m_host = "";
  50. $this->m_port = "80 ";
  51. $this->m_user = "";
  52. $this->m_pass = "";
  53. $this->m_path = "/";
  54. $this-> m_query = "";
  55. $this->m_error = "";
  56. $this->m_httphead = "" ;
  57. $this->m_html = "";
  58. $this- >Close();
  59. #初始化系統(tǒng)
  60. $this->PrivateInit($url);
  61. $this->PrivateStartSession();
  62. }
  64. /* *
  65. * ?? ??? ?? ??
  66. */
  67. ?? ?? printError() {
  68. echo "錯誤信息：".$this->m_error;
  69. echo "具體返回頭：
    ";
  70. foreach($this->m_httphead as $k=>$v) {
  71. echo "$k => $v
    rn";
  72. }
  73. }
  75. /**
  76. * Get ???? ???? ?? ??? ?? ??? ???? ??
  77. */
  78. ?? ?? IsGetOK() {
  79. if( ereg("^2 ",$this->GetHead("http-state")) ) {
  80. return true;
  81. } else {
  82. $this->m_error .= $this->GetHead("http -??")." - ".$this->GetHead("http-describe")."
    ";
  83. return false;
  84. }
  85. }
  87. /**
  88. * ??? ????? ??? ???? ??
  89. */
  90. ?? ?? IsText() {
  91. if (ereg("^2",$this->GetHead("http-state")) && eregi("^text",$this-> GetHead("content-type"))) {
  92. return true;
  93. } else {
  94. $this->m_error .= "內容為無文本類型
    ";
  95. return false;
  96. }
  97. }
  98. /**
  99. * ??? ????? ?? ???? ??
  100. */
  101. ?? ?? IsContentType($ctype) {
  102. if (ereg("^2",$this->GetHead ("http-state")) && $this->GetHead("content-type") == strtolower($ctype)) {
  103. return true
  104. } else {
  105. $this-> ;m_error .= "類型不對 ".$this->GetHead("content-type")."
    ";
  106. return false;
  107. }
  108. }
  110. /**
  111. * HTTP ????? ???? ?? ????
  112. */
  113. ?? ?? SaveToBin($savefilename) {
  114. if (!$this->IsGetOK()) return false;
  115. if (@feof($this-> m_fp)) {
  116. $this->m_error = "連接已經關閉!"
  117. return false;
  118. }
  119. $fp = fopen($savefilename,"w") ?? die("寫入文件 $savefilename 失敗!");
  120. while (!feof($this->m_fp)) {
  121. @fwrite($fp,fgets($this->m_fp,256));
  122. }
  123. @ fclose( $this->m_fp);
  124. return true;
  125. }
  127. /**
  128. * 儲存網頁內容為 Text 檔案
  129. */
  130. public function SaveToText($savefilename) {
  131. if ( $this- >IsText()) {
  132. $this->SaveBinFile($savefilename);
  133. } else {
  134. return "";
  135. }
  136. }
  138. /**
  139. * 用 HTTP 協(xié)定取得一個網頁的內容
  140. */
  141. public function GetHtml() {
  142. if (!$this->IsText()) return "";
  143. if ($this->m_html!= "") return $this- >m_html;
  144. if (!$this->m_fp||@feof($this->m_fp)) return "";
  145. while(!feof($this ->m_fp)) {
  146. $ this->m_html .= fgets($this->m_fp,256);
  147. }
  148. @fclose($this->m_fp);
  149. return $this->m_html;
  150. }
  151. }
  153. /**
  154. * 開始 HTTP 會話
  155. */
  156. public function PrivateStartSession() {
  157. if (!$this->PrivateOpenHost() ) {
  158. $this->m_error .= "開啟遠端主機錯誤！ ";
  159. } else {
  160. $httpv = "HTTP/1.0";
  161. }
  162. fputs($this->m_fp,"GET ".$this->m_urlpath."$httpvrn") ;
  163. fputs($this->m_fp,"主機:".$this->m_host."rn");
  164. fputs($this->m_fp,"接受：*/*rn");
  165. fputs($this->m_fp,"用戶代理：Mozilla/4.0（相容；MSIE 6.0；Windows NT 5.2)rn");
  166. #HTTP1.1協(xié)定必須指定文件結束後關閉鏈接，否則讀取文件時無法使用feof判斷結束
  167. if ($httpv=="HTTP/1.1") {
  168. fputs($this->m_fp,"連接: Closernrn");
  169. } else {
  170. fputs($this->m_fp,"rn");
  171. }
  172. $ httpsstas = fgets($this->m_fp,256);
  173. $httpsstas = split(" ",$httpsstas);
  174. $this->m_httphead["http-edition"] = trim($httpsstas [0]);
  175. $this->m_httphead["http-state"] = trim($httpsstas[1]);
  176. $this->m_httphead["http-describe"] = "" ;
  177. for ($i=2;$i $this->m_httphead[ "http-describe"] .= " ".trim($httpsstas[ $i]);
  178. }
  179. while (!feof($this->m_fp)) {
  180. $line = str_replace(" "","",trim(fgets($this->m_fp) m_fp,256)));
  181. if($line == "") break;
  182. if (ereg(":",$line )) {
  183. $lines = split(":",$ line);
  184. $this->m_httphead[strtolower(trim($lines[0]))] = trim($lines[1]);
  185. }
  186. }
  187. }
  189. /**
  190. * 得到一個Http頭的值
  191. */
  192. public function GetHead($headname) {
  193. $headname = strtolower($headname);
  194. if (isset($this->m_httphead[$headname) ])) {
  195. return $this->m_httphead[$headname];
  196. } else {
  197. return "";
  198. }
  199. }
  201. /**
  202. * 開啟連線
  203. */
  204. public function PrivateOpenHost() {
  205. if ($this->m_host=="") return false;
  206. $this ->m_fp = @fsockopen($this->m_fp; m_host, $this->m_port, &$errno, &$errstr,10);
  207. if (!$this->m_fp){
  208. $this->m_error = $errstr;
  209. return false;
  210. } else {
  211. return true;
  212. }
  213. }
  215. /**
  216. * 關閉連線
  217. */
  218. public function Close(){
  219. @ fclose($ this->m_fp);
  220. }
  221. }
  223. # 兩種使用方法，分別如下：
  225. #開啟網頁
  226. $httpdown = new HttpDownload ();
  227. $httpdown->OpenUrl("http://www.google.com.hk");
  228. echo $httpdown->GetHtml();
  229. $httpdown->關閉();
  231. #下載檔案
  232. $file = new HttpDownload(); # 實例化類別
  233. $file->OpenUrl("http://www.ti.com.cn/cn/lit/an/rust020/rust020.pdf"); # 遠端檔案位址
  234. $file->SaveToBin("rust020.pdf"); # 儲存路徑及檔名
  235. $file->Close(); # 釋放資源
  236. ?>
  239. 複製程式碼

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