Menu
I have very little idea how html works.What i want to do is exactly similar to the following but on android
<body> <form action="<%= some_url %>" method="post" enctype="multipart/form-data"> <input type="file" name="myFile"> <input type="submit" value="Submit"> </form> </body>I tried the following code -
private static void postToUrl(String url_to_upload_on, String file_name_with_ext, byte[] byteArray) { String attachmentName = "file"; String attachmentFileName = file_name_with_ext; String crlf = "\r\n"; String twoHyphens = "--"; String boundary = "*****"; try{ URL url = new URL(url_to_upload_on); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setDoOutput(true); connection.setRequestMethod("POST"); connection.setRequestProperty( "Content-Type", "multipart/form-data;boundary=" + boundary); DataOutputStream request = new DataOutputStream( connection.getOutputStream()); request.writeBytes(twoHyphens + boundary + crlf); request.writeBytes("Content-Disposition: form-data; name=\"" + attachmentName + "\";filename=\"" + attachmentFileName + "\"" + crlf); request.writeBytes(crlf); request.write(byteArray); request.writeBytes(crlf); request.writeBytes(twoHyphens + boundary + twoHyphens + crlf); request.flush(); request.close(); }catch(Exception e){ e.printStackTrace(); } } this gives me no direct errors but when i get error-stream using-
Log.w(TAG, "connection.getErrorStream() = " + connection.getErrorStream()); i get this-
12-14 18:25:54.911: W/uploadToBlobStore(30558): httpUrlConnection.getErrorStream() = com.android.okhttp.internal.http.HttpTransport$FixedLengthInputStream@426dd5a8 with no success.
PS- I am uploading a file to google blobstore
PS- I can not use Apache http libraries or its multipart class as android says its depreciated
EDIT 1
Now I am using the following code but it is working only for files less then 2.3Mb -
private static void postToUrl3(String url_to_upload_on, String file_name_with_ext, byte[] byteArray, String mimeType) { CloseableHttpClient httpClient = null; try { httpClient = HttpClientBuilder.create().build(); HttpPost postRequest = new HttpPost(url_to_upload_on); MultipartEntityBuilder reqEntity = MultipartEntityBuilder.create(); reqEntity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE); ByteArrayBody bab = new ByteArrayBody(byteArray, file_name_with_ext); reqEntity.addPart("file", bab); postRequest.setEntity(reqEntity.build()); httpClient.execute(postRequest);// takes time } catch (Exception e) { Log.w("uploadToBlobStore", "postToUrl Exception e = " + e); e.printStackTrace(); } finally { if (httpClient != null) { Log.w("uploadToBlobStore", "connection.closing "); try { httpClient.close(); } catch (IOException e) { Log.w("uploadToBlobStore", "connection.closing errot e = " + e); e.printStackTrace(); } } } } how to make it work with larger files?
PS- i am sending it to blobstore and i did set the maxUploadSizeBytesand MaxUploadSizeBytesPerBlob to 30MB.I am not able to figure out the issue with size because google blobstore documentation says -
Google App Engine includes the Blobstore service, which allows applications to serve data objects limited only by the amount of data that can be uploaded or downloaded over a single HTTP connection.
So can it be a problem with http connection? and if so, how can i configure it.
480
I am using HttpURLConnection to achieve this.
Create one Multipart custom class ::
public class MultipartUtility { private final String boundary; private static final String LINE_FEED = "\r\n"; private HttpURLConnection httpConn; private String charset; private OutputStream outputStream; private PrintWriter writer; /** * This constructor initializes a new HTTP POST request with content type * is set to multipart/form-data * * @param requestURL * @param charset * @throws IOException */ public MultipartUtility(String requestURL, String charset) throws IOException { this.charset = charset; // creates a unique boundary based on time stamp boundary = "===" + System.currentTimeMillis() + "==="; URL url = new URL(requestURL); httpConn = (HttpURLConnection) url.openConnection(); httpConn.setUseCaches(false); httpConn.setDoOutput(true); // indicates POST method httpConn.setDoInput(true); httpConn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary); outputStream = httpConn.getOutputStream(); writer = new PrintWriter(new OutputStreamWriter(outputStream, charset), true); } /** * Adds a form field to the request * * @param name field name * @param value field value */ public void addFormField(String name, String value) { writer.append("--" + boundary).append(LINE_FEED); writer.append("Content-Disposition: form-data; name=\"" + name + "\"") .append(LINE_FEED); writer.append("Content-Type: text/plain; charset=" + charset).append( LINE_FEED); writer.append(LINE_FEED); writer.append(value).append(LINE_FEED); writer.flush(); } /** * Adds a upload file section to the request * * @param fieldName name attribute in <input type="file" name="..." /> * @param uploadFile a File to be uploaded * @throws IOException */ public void addFilePart(String fieldName, File uploadFile) throws IOException { String fileName = uploadFile.getName(); writer.append("--" + boundary).append(LINE_FEED); writer.append( "Content-Disposition: form-data; name=\"" + fieldName + "\"; filename=\"" + fileName + "\"") .append(LINE_FEED); writer.append( "Content-Type: " + URLConnection.guessContentTypeFromName(fileName)) .append(LINE_FEED); writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED); writer.append(LINE_FEED); writer.flush(); FileInputStream inputStream = new FileInputStream(uploadFile); byte[] buffer = new byte[4096]; int bytesRead = -1; while ((bytesRead = inputStream.read(buffer)) != -1) { outputStream.write(buffer, 0, bytesRead); } outputStream.flush(); inputStream.close(); writer.append(LINE_FEED); writer.flush(); } /** * Adds a header field to the request. * * @param name - name of the header field * @param value - value of the header field */ public void addHeaderField(String name, String value) { writer.append(name + ": " + value).append(LINE_FEED); writer.flush(); } /** * Completes the request and receives response from the server. * * @return a list of Strings as response in case the server returned * status OK, otherwise an exception is thrown. * @throws IOException */ public List<String> finish() throws IOException { List<String> response = new ArrayList<String>(); writer.append(LINE_FEED).flush(); writer.append("--" + boundary + "--").append(LINE_FEED); writer.close(); // checks server's status code first int status = httpConn.getResponseCode(); if (status == HttpURLConnection.HTTP_OK) { BufferedReader reader = new BufferedReader(new InputStreamReader( httpConn.getInputStream())); String line = null; while ((line = reader.readLine()) != null) { response.add(line); } reader.close(); httpConn.disconnect(); } else { throw new IOException("Server returned non-OK status: " + status); } return response; } } Use it (async way) ::
MultipartUtility multipart = new MultipartUtility(requestURL, charset); // In your case you are not adding form data so ignore this /*This is to add parameter values */ for (int i = 0; i < myFormDataArray.size(); i++) { multipart.addFormField(myFormDataArray.get(i).getParamName(), myFormDataArray.get(i).getParamValue()); } //add your file here. /*This is to add file content*/ for (int i = 0; i < myFileArray.size(); i++) { multipart.addFilePart(myFileArray.getParamName(), new File(myFileArray.getFileName())); } List<String> response = multipart.finish(); Debug.e(TAG, "SERVER REPLIED:"); for (String line : response) { Debug.e(TAG, "Upload Files Response:::" + line); // get your server response here. responseString = line; } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
