Php remote download class sharing

This article mainly shares the php remote download class. Users can download files to the host. interested friends can refer to the examples in this article to share the php remote download class as follows:

<? Php/*** remote file download supports resumable Upload */class HttpDownload {private $ m_url = ""; private $ m_urlpath = ""; private $ m_scheme = "http "; private $ m_host = ""; private $ m_port = "80"; private $ m_user = ""; private $ m_pass = ""; private $ m_path = "/"; private $ m_query = ""; private $ m_fp = ""; private $ m_error = ""; private $ m_httphead = ""; private $ m_html = ""; /*** initialize */public function PrivateInit ($ url) {$ urls = ""; $ Urls = @ parse_url ($ url); $ this-> m_url = $ url; if (is_array ($ urls )) {$ this-> m_host = $ urls ["host"]; if (! Empty ($ urls ["scheme"]) $ this-> m_scheme = $ urls ["scheme"]; if (! Empty ($ urls ["user"]) $ this-> m_user = $ urls ["user"]; if (! Empty ($ urls ["pass"]) $ this-> m_pass = $ urls ["pass"]; if (! Empty ($ urls ["port"]) $ this-> m_port = $ urls ["port"]; if (! Empty ($ urls ["path"]) $ this-> m_path = $ urls ["path"]; $ this-> m_urlpath = $ this-> m_path; if (! Empty ($ urls ["query"]) {$ this-> m_query = $ urls ["query"]; $ this-> m_urlpath. = "? ". $ This-> m_query ;}}/ *** open the specified url */function OpenUrl ($ url) {# reset the parameters $ this-> m_url = ""; $ this-> m_urlpath = ""; $ this-> m_scheme = "http"; $ this-> m_host = ""; $ this-> m_port = "80 "; $ this-> m_user = ""; $ this-> m_pass = ""; $ this-> m_path = "/"; $ this-> m_query = ""; $ this-> m_error = ""; $ this-> m_httphead = ""; $ this-> m_html = ""; $ this-> Close (); # Initialize the system $ this-> PrivateInit ($ url); $ this-> PrivateStartSession ();}/*** get the cause of an operation error */public function printError () {echo "error message :". $ this-> m_error; echo "specific return headers:
"; Foreach ($ this-> m_httphead as $ k = >$ v) {echo" $ k => $ v
\ R \ n ";}}/*** determine whether the response result of the header sent by the Get method is correct */public function IsGetOK () {if (ereg ("^ 2", $ this-> GetHead ("http-state") {return true;} else {$ this-> m_error. = $ this-> GetHead ("http-state "). "-". $ this-> GetHead ("http-describe ")."
"; Return false ;}}/*** check whether the returned webpage is of the text type */public function IsText () {if (ereg (" ^ 2 ", $ this-> GetHead ("http-state") & eregi ("^ text", $ this-> GetHead ("content-type "))) {return true;} else {$ this-> m_error. = "The content is non-text
"; Return false ;}}/*** determine whether the returned webpage is of a specific type */public function IsContentType ($ ctype) {if (ereg (" ^ 2 ", $ this-> GetHead ("http-state") & $ this-> GetHead ("content-type") = strtolower ($ ctype) {return true ;} else {$ this-> m_error. = "wrong type ". $ this-> GetHead ("content-type ")."
"; Return false ;}}/*** download an object using HTTP */public function SaveToBin ($ savefilename) {if (! $ This-> IsGetOK () return false; if (@ feof ($ this-> m_fp) {$ this-> m_error = "The connection has been closed! "; Return false;} $ fp = fopen ($ savefilename," w ") or die (" An error occurred while writing $ savefilename to the file! "); While (! Feof ($ this-> m_fp) {@ fwrite ($ fp, fgets ($ this-> m_fp, 256) ;}@ fclose ($ this-> m_fp ); return true;}/*** save the webpage content as a Text file */public function SaveToText ($ savefilename) {if ($ this-> IsText ()) {$ this-> SaveBinFile ($ savefilename);} else {return "" ;}}/*** obtain the content of a webpage through HTTP */public function GetHtml () {if (! $ This-> IsText () return ""; if ($ this-> m_html! = "") Return $ this-> m_html; if (! $ This-> m_fp | @ feof ($ this-> m_fp) return ""; while (! Feof ($ this-> m_fp) {$ this-> m_html. = fgets ($ this-> m_fp, 256) ;}@ fclose ($ this-> m_fp); return $ this-> m_html ;} /*** start HTTP session */public function PrivateStartSession () {if (! $ This-> PrivateOpenHost () {$ this-> m_error. = "an error occurred while enabling the remote host! "; Return false;} if ($ this-> GetHead (" http-edition ") =" HTTP/1.1 ") {$ httpv =" HTTP/1.1 ";} else {$ httpv = "HTTP/1.0";} fputs ($ this-> m_fp, "GET ". $ this-> m_urlpath. "$ httpv \ r \ n"); fputs ($ this-> m_fp, "Host :". $ this-> m_host. "\ r \ n"); fputs ($ this-> m_fp, "Accept: */* \ r \ n"); fputs ($ this-> m_fp, "User-Agent: Mozilla/4.0 + (compatible; + MSIE + 6.0; + Windows + NT + 5.2) \ r \ n "); # The link must be closed after the document ends in HTTP1.1 protocol. otherwise, feof cannot be used to judge the end of the document when reading the document. if ($ httpv = "HTTP/1.1 ") {fputs ($ this-> m_fp, "Connection: Close \ r \ n");} else {fputs ($ this-> m_fp, "\ r \ n") ;}$ httpstas = fgets ($ this-> m_fp, 256); $ httpstas = split ("", $ httpstas ); $ this-> m_httphead ["http-edition"] = trim ($ httpstas [0]); $ this-> m_httphead ["http-state"] = trim ($ httpstas [1]); $ this-> m_httphead ["http-describe"] = ""; for ($ I = 2; $ I
 
  
M_httphead ["http-describe"]. = ". trim ($ httpstas [$ I]);} while (! Feof ($ this-> m_fp) {$ line = str_replace ("\" "," ", trim (fgets ($ this-> m_fp, 256 ))); if ($ line = "") break; if (ereg (":", $ line) {$ lines = split (":", $ line ); $ this-> m_httphead [strtolower (trim ($ lines [0])] = trim ($ lines [1]) ;}} /*** get the value of an Http header */public function GetHead ($ headname) {$ headname = strtolower ($ headname ); if (isset ($ this-> m_httphead [$ headname]) {return $ this-> m_httphead [$ headname];} e Lse {return "" ;}}/*** open connection */public function PrivateOpenHost () {if ($ this-> m_host = "") return false; $ this-> m_fp = @ fsockopen ($ this-> m_host, $ this-> m_port, & $ errno, & $ errstr, 10); if (! $ This-> m_fp) {$ this-> m_error = $ errstr; return false;} else {return true ;}/ *** Close connection */public function Close () {@ fclose ($ this-> m_fp) ;}# use the following methods: # Open the webpage $ httpdown = new HttpDownload (); $ httpdown-> OpenUrl (" http://www.google.com.hk "); Echo $ httpdown-> GetHtml (); $ httpdown-> Close (); # download the file $ file = new HttpDownload (); # instantiation class $ file-> OpenUrl (" http://dldir1.qq.com/qqfile/qq/QQ8.2/17724/QQ8.2.exe "); # Remote file address $ file-> SaveToBin (" qq.exe "); # save path and file name $ file-> Close (); # release resources
 

The above is all the content of this article, hoping to help you learn.