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POJavascript file dropping and reading directories - Asynchronous Recursion
 

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  1. POJavascript file dropping and reading directories - Asynchronous Recursion
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    <p>So I'm trying to create a file dropper web application. Right now, a user can drop files on the screen and I can read them, including all the files in a directory that was dropped. But, I don't know when the script is done reading the files.</p> <p>Some code:</p> <p>This first function handles a 'drop' event and will loop through each file and send it to another function that will read its contents.</p> <pre><code>function readDrop( evt ) { for( var i = 0; i &lt; evt.dataTransfer.files.length; i++) { var entry = evt.dataTransfer.items[i].webkitGetAsEntry(); if(entry) readContents(entry, ""); } //Do stuff after all files and directories have been read. } </code></pre> <p>This function is a recursive FileEntry reader. If it is a file, I will read the FileEntry. If it is a directory, it will loop through the contents and pass it through this function.</p> <pre><code>function readContents(entry, path) { if( entry.isFile ) { readFileData( entry, path, function(fileData) { _MyFiles.push( fileData ); }); } else if( entry.isDirectory ) { var directoryReader = entry.createReader(); var path = path + entry.name; directoryReader.readEntries(function(results) { for( var j = 0; j &lt; results.length; j++ ) { readContents(entry, path); } }, errorHandler) } } </code></pre> <p>And here is my function for reading the files. The callback just pushes the fileData object to a global array</p> <pre><code>function readFileData(entry, path, callback) { var fileData = {"name": entry.name, "size": 0, "path": path, "file": entry}; entry.file(function(file) { fileData["size"] = file.size; callback( fileData ); } } </code></pre> <p>I'm not sure where to go from here so that I can have a callback when all files and directories have been read.</p>
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    1. PTQuestion
    1. USfrshca
    1. USfrshca
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    1. COThe interesting bit is in the code you left out where you have the comment `//read the file` - show us that code and we might be able to help you
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      1. POJavascript file dropping and reading directories - Asynchronous Recursion
      1. USMartin Jespersen
    2. COOk I guess I didn't think that part of the code was that important, but I added it
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      1. POJavascript file dropping and reading directories - Asynchronous Recursion
      1. USfrshca
 

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