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POSaving an uploaded image remotely - Java and Tomcat
 

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    <p>These are days that I'm banging my head on this problem and maybe you that certainly know more than me you can help me .... Then I try to explain better.</p> <p>I have a javascript file that through the library d3.js builds the html code pages and replaces it with the other code each part a different function ... The page will not charge (Ajax). At some point I need to allow the user to upload an image to their profile picture so I make sure that the html code bait </p> <pre><code>&lt;input type="file" id="file"&gt; </code></pre> <p>and a </p> <pre><code>&lt;input type = "button" onclick = "javaScript: performAjaxSubmit ()"&gt; </code></pre> <p>PerformAjaxSubmit function () sends the data to a Java Servlet via a xmlHttpRequest level 2, which, from what I understand, can send not only strings but also more complex things such as files.</p> <p>The function is as follows:</p> <pre><code>function performAjaxSubmit() { var sampleFile = document.getElementById("file").files[0]; var formdata = new FormData(); formdata.append("sampleFile", sampleFile); var xhr = new XMLHttpRequest(); xhr.open("POST", "http://127.0.0.1:8080/Prova/Upload", true); xhr.send(formdata); xhr.onload = function(e) { if (this.status == 200) { alert(this.responseText); } }; } </code></pre> <p>The code in the Servlet instead is this:</p> <pre><code>protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // Check that we have a file upload request System.out.println(request.getAttribute("username")); isMultipart = ServletFileUpload.isMultipartContent(request); response.setContentType("text/html"); java.io.PrintWriter out = response.getWriter( ); DiskFileItemFactory factory = new DiskFileItemFactory(); // maximum size that will be stored in memory factory.setSizeThreshold(maxMemSize); // Location to save data that is larger than maxMemSize. factory.setRepository(new File("C:/Users/Marty/workspaceJEE/Prova/WebContent/imm/utenti")); filePath="C:/Users/Marty/workspaceJEE/Prova/WebContent/imm/utenti"; // Create a new file upload handler ServletFileUpload upload = new ServletFileUpload(factory); // maximum file size to be uploaded. upload.setSizeMax( maxFileSize ); try{ // Parse the request to get file items. List fileItems = upload.parseRequest(request); // Process the uploaded file items Iterator i = fileItems.iterator(); while ( i.hasNext () ) { FileItem fi = (FileItem)i.next(); if ( !fi.isFormField () ) { // Get the uploaded file parameters String fieldName = fi.getFieldName(); String fileName = fi.getName(); String contentType = fi.getContentType(); boolean isInMemory = fi.isInMemory(); long sizeInBytes = fi.getSize(); // Write the file if( fileName.lastIndexOf("\\") &gt;= 0 ){ file = new File( filePath +"/"+ fileName.substring( fileName.lastIndexOf("\\"))) ; }else{ System.out.println(filePath + fileName.substring(fileName.lastIndexOf("\\")+1)); file = new File( filePath +"/"+ fileName.substring(fileName.lastIndexOf("\\")+1)) ; } fi.write( file ) ; } } }catch(Exception ex) { System.out.println(ex); } } </code></pre> <p>Now (sorry if the question is a bit long) it works but the problem is that the images are saved in the path that I have provided me with the command:</p> <pre><code>factory.setRepository(new File("C:/Users/Marty/workspaceJEE/Prova/WebContent/imm/utenti")); </code></pre> <p>How do I then save it remotely? That is, once I load the site of such Altrevista, how do I make sure that they are not pià saved to C but in a folder in your project?</p> <p>I hope I explained. I'm using Apache Tomcat v7.0. Thanks in advance!</p>
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