Php super large file download and resumable download implementation code

Php super large file download and resumable download implementation code

$ SourceFile = "jbxue. tmp"; // temporary file name to be downloaded $ OutFile = "..xls"; // download the file name saved to the client $ File_extension = strtolower (substr (strrchr ($ sourceFile, "."), 1); // get the file extension // Echo $ sourceFile; If (! Ereg ("[tmp | txt | rar | pdf | doc]", $ file_extension) exit ("illegal resource download "); // Check whether the file exists If (! Is_file ($ sourceFile )){ Die ("404 File not found!"); } $ Len = filesize ($ sourceFile); // get the file size $ Filename = basename ($ sourceFile); // get the file name $ OutFile_extension = strtolower (substr (strrchr ($ outFile, "."), 1); // get the file extension // Specify the output browser format based on the extension Switch ($ outFile_extension ){ Case "exe ": $ Ctype = "application/octet-stream "; Break; Case "zip ": $ Ctype = "application/zip "; Break; Case "mp3 ": $ Ctype = "audio/mpeg "; Break; Case "mpg ": $ Ctype = "video/mpeg "; Break; Case "avi ": $ Ctype = "video/x-msvideo "; Break; Default: $ Ctype = "application/force-download "; } // Begin writing headers Header ("Cache-Control :"); Header ("Cache-Control: public "); // Set the output browser format Header ("Content-Type: $ ctype "); Header ("Content-Disposition: attachment; filename =". $ outFile ); Header ("Accept-Ranges: bytes "); $ Size = filesize ($ sourceFile ); // If $ _ SERVER ['http _ range'] parameter exists If (isset ($ _ SERVER ['http _ range']) { /* The Range header can request one or more sub-ranges of an object. For example, Indicates the first 500 bytes: bytes = 0-499 Indicates the second 500 bytes: bytes = 500-999 Indicates the last 500 bytes: bytes =-500 Indicates the range after 500 bytes: bytes = 500- First and Last bytes: bytes = 0-0,-1 Specify the following ranges: bytes = 500-600,601-999. However, the server can ignore this request header. if the unconditional GET contains the Range request header, the response will be returned with the status code 206 (PartialContent) instead of 200 (OK ). */ // The value of connecting to $ _ SERVER ['http _ range'] again after the breakpoint is bytes = 4390912- List ($ a, $ range) = explode ("=", $ _ SERVER ['http _ range']); // If yes, download missing part Str_replace ($ range, "-", $ range); // What is this sentence .... $ Size2 = $ size-1; // total file bytes $ New_length = $ size2-$ range; // Obtain the length of the next download. Header ("HTTP/1.1 206 Partial Content "); Header ("Content-Length: $ new_length"); // The total Length of input Header ("Content-Range: bytes $ range $ size2/$ size"); // Content-Range: bytes 4908618-4988927/4988928 95% } Else { // The first connection $ Size2 = $ size-1; Header ("Content-Range: bytes 0-$ size2/$ size"); // Content-Range: bytes 0-4988927/4988928 Header ("Content-Length:". $ size); // total output Length } // Open the file // Edit bbs.it-home.org $ Fp = fopen ("$ sourceFile", "rb "); // Set the pointer position Fseek ($ fp, $ range ); // Unreal output While (! Feof ($ fp )){ // Set the maximum file execution time Set_time_limit (0 ); Print (fread ($ fp, 1024*8); // output file Flush (); // OUTPUT BUFFER Ob_flush (); } Fclose ($ fp ); Exit (); ?>