Databases
StackOverflow2013
Postsdbo
POSend image with HttpUrlConnection by chunks and other parameters
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POSend image with HttpUrlConnection by chunks and other parameters
    primarykey
    data
    text
    <p>The thing is I'm trying to upload an image to a server. The image has to be uploaded by chunks of 256kb and I need to pass the chunks count and id with every call. I can get the total number of chunks to upload and I'm using a BufferedInputStream to get the chunks bytes. But when I finish to upload all the chunks the image showed is always corrupted.</p> <p>My code so far:</p> <pre><code>int chunkSize = 255 * 1024; final long size = mFile.length(); final long chunks = mFile.length() &lt; chunkSize? 1: (mFile.length() / chunkSize); int chunkId = 0; BufferedInputStream stream = new BufferedInputStream(new FileInputStream(mFile)); String lineEnd = "\r\n"; String twoHyphens = "--"; String boundary = "RQdzAAihJq7Xp1kjraqf";// random data for (chunkId = 0; chunkId &lt; chunks; chunkId++) { URL url = new URL(urlString); // Open a HTTP connection to the URL conn = (HttpURLConnection) url.openConnection(); conn.setReadTimeout(20000 /* milliseconds */); conn.setConnectTimeout(20000 /* milliseconds */); // Allow Inputs conn.setDoInput(true); // Allow Outputs conn.setDoOutput(true); // Don't use a cached copy. conn.setUseCaches(false); // Use a post method. conn.setRequestMethod("POST"); conn.setRequestProperty("Connection", "Keep-Alive"); conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary); dos = new DataOutputStream( conn.getOutputStream() ); dos.writeBytes(twoHyphens + boundary + lineEnd); String param1 = ""+chunkId; String param2 = ""+chunks; String param3 = mFile.getName(); // for every param dos.writeBytes("Content-Disposition: form-data; name=\"chunk\"" + lineEnd); dos.writeBytes("Content-Type: text/plain; charset=UTF-8" + lineEnd); dos.writeBytes("Content-Length: " + param1.length() + lineEnd); dos.writeBytes(lineEnd); dos.writeBytes(param1 + lineEnd); dos.writeBytes(twoHyphens + boundary + lineEnd); // Send parameter #chunks dos.writeBytes("Content-Disposition: form-data; name=\"chunks\"" + lineEnd); dos.writeBytes("Content-Type: text/plain; charset=UTF-8" + lineEnd); dos.writeBytes("Content-Length: " + param2.length() + lineEnd); dos.writeBytes(lineEnd); dos.writeBytes(param2 + lineEnd); dos.writeBytes(twoHyphens + boundary + lineEnd); // Send parameter #name dos.writeBytes("Content-Disposition: form-data; name=\"name\"" + lineEnd); dos.writeBytes("Content-Type: text/plain; charset=UTF-8" + lineEnd); dos.writeBytes("Content-Length: " + param4.length() + lineEnd); dos.writeBytes(lineEnd); dos.writeBytes(param3 + lineEnd); dos.writeBytes(twoHyphens + boundary + lineEnd); // Send parameter #file dos.writeBytes("Content-Disposition: form-data; name=\"file\";filename=\"" + param4 + "\"" + lineEnd); // filename is the Name of the File to be uploaded dos.writeBytes("Content-Type: image/jpeg" + lineEnd); dos.writeBytes(lineEnd); byte[] buffer = new byte[chunkSize]; stream.skip(chunkId * chunkSize); stream.read(buffer); // dos.write(buffer, 0, bufferSize); dos.write(buffer); dos.writeBytes(lineEnd); dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); dos.flush(); dos.close(); // read response... } </code></pre> <p>Many thanks!</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USChronos
    1. USChronos
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POSend image with HttpUrlConnection by chunks and other parameters
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POSend image with HttpUrlConnection by chunks and other parameters
      1. This table or related slice is empty.
      1. VTUpMod
    1. COdid you find a solution on this problem please tell me what you do I have the same problem. Thanks
      singulars
      1. POSend image with HttpUrlConnection by chunks and other parameters
      1. USNewDroidDev
    2. CO@NewDroidDev, this line was wrong: stream.skip(chunkId * chunkSize);. I deleted it and all works fine now.
      singulars
      1. POSend image with HttpUrlConnection by chunks and other parameters
      1. USChronos
    3. COmay I know what is the value of your param4?
      singulars
      1. POSend image with HttpUrlConnection by chunks and other parameters
      1. USNewDroidDev
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload