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php+resumablejs实现的分块上传 断点续传功能示例

转载 作者：qq735679552 更新时间：2022-09-28 22:32:09 28 4
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这篇CFSDN的博客文章php+resumablejs实现的分块上传 断点续传功能示例由作者收集整理，如果你对这篇文章有兴趣，记得点赞哟.

本文实例讲述了php+resumablejs实现的分块上传 断点续传功能。分享给大家供大家参考，具体如下:

resumablejs官网 http://www.resumablejs.com/ 。

upload.html 。

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<!DOCTYPE html>
<html lang= "en" >
<div>
  <a href= "#" rel= "external nofollow" id= "browseButton" >Select files</a>
<div>
<div>
<input id= "btnCancel" type= "button" onClick= 'r.pause()' value= "Cancel All Uploads"
  style= "margin-left: 2px; height: 22px; font-size: 8pt;" />
    <br />
</div>
<script src= "resumable.js" ></script>
<script>
var r = new Resumable({
  target: 'upload.php' ,
  chunkSize:2*1024*1024,
  simultaneousUploads:4,
  testChunks: true ,
  throttleProgressCallbacks:1,
});
r.assignBrowse(document.getElementById( 'browseButton' ));
r.on( 'fileSuccess' , function (file){
  // console.debug(file);
  });
r.on( 'fileProgress' , function (file){
  // console.debug(file);
  });
r.on( 'fileAdded' , function (file, event){
  r.upload();
  //console.debug(file, event);
  });
r.on( 'fileRetry' , function (file){
  //console.debug(file);
  });
r.on( 'fileError' , function (file, message){
  //console.debug(file, message);
  });
r.on( 'uploadStart' , function (){
  //console.debug();
  });
r.on( 'complete' , function (){
  //console.debug();
  });
r.on( 'progress' , function (){
  //console.debug();
  });
r.on( 'error' , function (message, file){
  //console.debug(message, file);
  });
r.on( 'pause' , function (file,message){
  //console.debug();
  });
r.on( 'cancel' , function (){
  //console.debug();
  });
</script>
</html>

upload.php 。

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<?php
/**
  * This is the implementation of the server side part of
  * Resumable.js client script, which sends/uploads files
  * to a server in several chunks.
  *
  * The script receives the files in a standard way as if
  * the files were uploaded using standard HTML form (multipart).
  *
  * This PHP script stores all the chunks of a file in a temporary
  * directory (`temp`) with the extension `_part<#ChunkN>`. Once all
  * the parts have been uploaded, a final destination file is
  * being created from all the stored parts (appending one by one).
  *
  * @author Gregory Chris (http://online-php.com)
  * @email www.online.php@gmail.com
  */
////////////////////////////////////////////////////////////////////
// THE FUNCTIONS
////////////////////////////////////////////////////////////////////
/**
  *
  * Logging operation - to a file (upload_log.txt) and to the stdout
  * @param string $str - the logging string
  */
function _log( $str ) {
  // log to the output
  $log_str = date ( 'd.m.Y' ). ": {$str}\r\n" ;
  echo $log_str ;
  // log to file
  if (( $fp = fopen ( 'upload_log.txt' , 'a+' )) !== false) {
   fputs ( $fp , $log_str );
   fclose( $fp );
  }
}
/**
  *
  * Delete a directory RECURSIVELY
  * @param string $dir - directory path
  * @link http://php.net/manual/en/function.rmdir.php
  */
function rrmdir( $dir ) {
  if ( is_dir ( $dir )) {
   $objects = scandir( $dir );
   foreach ( $objects as $object ) {
    if ( $object != "." && $object != ".." ) {
     if ( filetype ( $dir . "/" . $object ) == "dir" ) {
      rrmdir( $dir . "/" . $object );
     } else {
      unlink( $dir . "/" . $object );
     }
    }
   }
   reset( $objects );
   rmdir ( $dir );
  }
}
/**
  *
  * Check if all the parts exist, and
  * gather all the parts of the file together
  * @param string $dir - the temporary directory holding all the parts of the file
  * @param string $fileName - the original file name
  * @param string $chunkSize - each chunk size (in bytes)
  * @param string $totalSize - original file size (in bytes)
  */
function createFileFromChunks( $temp_dir , $fileName , $chunkSize , $totalSize ) {
  // count all the parts of this file
  $total_files = 0;
  foreach (scandir( $temp_dir ) as $file ) {
   if ( stripos ( $file , $fileName ) !== false) {
    $total_files ++;
   }
  }
  // check that all the parts are present
  // the size of the last part is between chunkSize and 2*$chunkSize
  if ( $total_files * $chunkSize >= ( $totalSize - $chunkSize + 1)) {
   // create the final destination file
   if (( $fp = fopen ( 'temp/' . $fileName , 'w' )) !== false) {
    for ( $i =1; $i <= $total_files ; $i ++) {
     fwrite( $fp , file_get_contents ( $temp_dir . '/' . $fileName . '.part' . $i ));
     _log( 'writing chunk ' . $i );
    }
    fclose( $fp );
   } else {
    _log( 'cannot create the destination file' );
    return false;
   }
   // rename the temporary directory (to avoid access from other
   // concurrent chunks uploads) and than delete it
   if (rename( $temp_dir , $temp_dir . '_UNUSED' )) {
    rrmdir( $temp_dir . '_UNUSED' );
   } else {
    rrmdir( $temp_dir );
   }
  }
}
////////////////////////////////////////////////////////////////////
// THE SCRIPT
////////////////////////////////////////////////////////////////////
//check if request is GET and the requested chunk exists or not. this makes testChunks work
if ( $_SERVER [ 'REQUEST_METHOD' ] === 'GET' ) {
  $temp_dir = 'temp/' . $_GET [ 'resumableIdentifier' ];
  $chunk_file = $temp_dir . '/' . $_GET [ 'resumableFilename' ]. '.part' . $_GET [ 'resumableChunkNumber' ];
  if ( file_exists ( $chunk_file )) {
    header( "HTTP/1.0 200 Ok" );
   } else
   {
    header( "HTTP/1.0 404 Not Found" );
   }
  }
// loop through files and move the chunks to a temporarily created directory
if (! empty ( $_FILES )) foreach ( $_FILES as $file ) {
  // check the error status
  if ( $file [ 'error' ] != 0) {
   _log( 'error ' . $file [ 'error' ]. ' in file ' . $_POST [ 'resumableFilename' ]);
   continue ;
  }
  // init the destination file (format <filename.ext>.part<#chunk>
  // the file is stored in a temporary directory
  $temp_dir = 'temp/' . $_POST [ 'resumableIdentifier' ];
  $dest_file = $temp_dir . '/' . $_POST [ 'resumableFilename' ]. '.part' . $_POST [ 'resumableChunkNumber' ];
  // create the temporary directory
  if (! is_dir ( $temp_dir )) {
   mkdir ( $temp_dir , 0777, true);
  }
  // move the temporary file
  if (!move_uploaded_file( $file [ 'tmp_name' ], $dest_file )) {
   _log( 'Error saving (move_uploaded_file) chunk ' . $_POST [ 'resumableChunkNumber' ]. ' for file ' . $_POST [ 'resumableFilename' ]);
  } else {
   // check if all the parts present, and create the final destination file
   createFileFromChunks( $temp_dir , $_POST [ 'resumableFilename' ],
     $_POST [ 'resumableChunkSize' ], $_POST [ 'resumableTotalSize' ]);
  }
}

希望本文所述对大家PHP程序设计有所帮助.

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