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POWhy doesn't servlet find FileItem in multipart request?
 

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  1. POWhy doesn't servlet find FileItem in multipart request?
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    <p>I've written a Servlet that handles file uploads using the Apache commons file upload library. Here is some of the code:</p> <pre><code>protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { boolean isMultipart = ServletFileUpload.isMultipartContent(request); if (isMultipart) { try { DiskFileItemFactory fileItemFactory = new DiskFileItemFactory(); // Set size threshold for storing upload fileItemFactory.setSizeThreshold(1 * 1024 * 50); // 50 KB // Set temporary directory to store uploaded files above threshold size fileItemFactory.setRepository(new File(TEMP_DIRECTORY)); ServletFileUpload upload = new ServletFileUpload(fileItemFactory); //HashMap&lt;String, String&gt; params = new HashMap&lt;String, String&gt;(); FileItemIterator iterator = upload.getItemIterator(request); upload.setSizeMax(REQUEST_MAX_SIZE); List items = upload.parseRequest(request); Iterator it = items.iterator(); while (it.hasNext()) { FileItem item = (FileItem) it.next(); if(item.isFormField()) { } else { String contentType = item.getContentType(); String fileName = item.getName(); String fieldName = item.getFieldName(); boolean isInMemory = item.isInMemory(); long sizeInBytes = item.getSize(); File uploadedFile = new File(PATH + "new_audio1.amr"); item.write(uploadedFile); System.out.println("Field: " + fieldName); System.out.println("File name: " + fileName); System.out.println("Size: " + sizeInBytes); System.out.println("Is in memory:" + isInMemory); } } } catch (Exception ex) { throw new ServletException(ex); } } else { throw new ServletException(); } </code></pre> <p>For some reason that escapes me the List 'items' is empty so I can't grab the uploaded file. </p> <p>For the upload itself, I've written some java code: </p> <pre><code>File audioFile = new File("C:\\Users\\Soto\\Desktop\\test recording.amr"); String url = "http://localhost:8080/AudioFileUpload/UploadServlet"; String charset = "UTF-8"; // random values String latitude = "145"; String longitude = "132"; String speed = "0"; String query; try { query = String.format("latitude=%s&amp;longitude=%s&amp;speed=%s", URLEncoder.encode(latitude, charset), URLEncoder.encode(longitude, charset), URLEncoder.encode(speed, charset)); } catch (UnsupportedEncodingException e) { query = String.format("latitude=%s&amp;longitude=%s&amp;speed=%s", latitude, longitude, speed); } HttpClient httpClient = new DefaultHttpClient(); httpClient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1); HttpPost httpPost = new HttpPost(url + "?" + query); MultipartEntity mpEntity = new MultipartEntity(); ContentBody cbFile = new FileBody(audioFile, "audio/AMR"); mpEntity.addPart("audioFile", cbFile); httpPost.setEntity(mpEntity); HttpResponse response = null; try { response = httpClient.execute(httpPost); HttpEntity responseEntity = response.getEntity(); System.out.println(response.getStatusLine()); if(responseEntity != null) System.out.println(EntityUtils.toString(responseEntity)); if(responseEntity != null) { EntityUtils.consume(responseEntity); } httpClient.getConnectionManager().shutdown(); } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } </code></pre> <p>It feels to me like the file is being attached and uploaded correctly. I also tried doing it through HTML with a multipart/form-data post request, but the file still wasn't found.</p> <p>What am I doing wrong?</p> <p>EDIT: I removed the line at the beginning of the doPost() along with the if statement: </p> <pre><code>ServletFileUpload.isMultipartContent(request); </code></pre> <p>And then the upload worked correctly. Is it possible that this method consumes the request's 'input/output/whatever it is' stream?</p> <p>Thanks </p>
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    1. USSotirios Delimanolis
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    1. CODid you try to upload from the browser?
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      1. USAlexander Pogrebnyak
 

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