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    <p>you should not worry about setting 'content-length' header on a post if you are using the correct methods. With Post, you usually use some overloaded version of 'SetEntity($Type-stream/string/encodedArray...)' </p> <p>look at this <a href="http://svn.apache.org/viewvc/httpcomponents/oac.hc3x/trunk/src/java/org/apache/commons/httpclient/methods/EntityEnclosingMethod.java?view=markup" rel="nofollow noreferrer">source</a>( search on length) to see examples of how the API takes care of the length for you on a post.</p> <p>You should evaluate what lib you will use for http and find POST examples showing methods like 'setEntity' to set the body of the post. that way , you will not get errors related to content-length. see <a href="https://stackoverflow.com/questions/6028981/using-httpclient-and-httppost-in-android-with-post-parameters">example</a></p> <p>Sample code "HttpConnection" class - using links from my comment...</p> <p>For JSON OR Bitmap:</p> <pre><code>try { HttpResponse response = null; switch (method) { case GET: HttpGet httpGet = new HttpGet(url); response = httpClient.execute(httpGet); break; //Note on NIO - using a FileChannel and mappedByteBuffer may be NO Faster // than using std httpcore http.entity.FileEntity case POST: //TODO bmp to stream to bytearray for data entity HttpPost httpPost = new HttpPost(url); //urlends "audio OR "pic" if ( !url.contains("class") ){ ByteArrayOutputStream stream = new ByteArrayOutputStream(); //can alter belo for smaller uploads to parse .JPG , 40,strm bmp.compress(Bitmap.CompressFormat.PNG, 100, stream); httpPost.setEntity(new ByteArrayEntity(stream.toByteArray())); }else if(data != null &amp;&amp; (url.contains("class"))){ //bug data is blank httpPost.setEntity(new StringEntity(data)); Log.d(TAG, "DATA in POST run-setup " +data); } response = httpClient.execute(httpPost); break; case PUT: HttpPut httpPut = new HttpPut(url); httpPut.setEntity(new StringEntity(data)); response = httpClient.execute(httpPut); break; case DELETE: response = httpClient.execute(new HttpDelete(url)); break; case BITMAP: response = httpClient.execute(new HttpGet(url)); processBitmapEntity(response.getEntity()); break; } if (method &lt; BITMAP) processEntity(response.getEntity()); } catch (Exception e) { handler.sendMessage(Message.obtain(handler, HttpConnection.DID_ERROR, e)); } </code></pre> <p>For XML body in Post:</p> <pre><code>try { HttpResponse response = null; switch (method) { case POST: HttpPost httpPost = new HttpPost(url); if (data != null){ System.out.println(" post data not null "); httpPost.setEntity(new StringEntity(data)); } if (entry != null){ ContentProducer cp = new ContentProducer() { public void writeTo(OutputStream outstream) throws IOException { ExtensionProfile ep = new ExtensionProfile(); ep.addDeclarations(entry); XmlWriter xmlWriter = new XmlWriter(new OutputStreamWriter(outstream, "UTF-8")); entry.generate(xmlWriter, ep); xmlWriter.flush(); } }; httpPost.setEntity(new EntityTemplate(cp)); } httpPost.addHeader("GData-Version", "2"); httpPost.addHeader("X-HTTP-Method-Override", "PATCH"); httpPost.addHeader("If-Match", "*"); httpPost.addHeader("Content-Type", "application/xml"); response = httpClient.execute(httpPost); break; } if (method &lt; BITMAP) processEntity(response.getEntity()); } catch (Exception e) { handler.sendMessage(Message.obtain(handler, HttpConnection.DID_ERROR, e)); } </code></pre>
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    1. POAndroid DefaultHttpClient POST method Can't set Content Length, getting Http Error 411
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    1. USCommunity
    1. USRobert Rowntree
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    1. COI rewrote the HttpPost so I create the entity first, set the content type, then I set the entity to the post. It looks like the following. `StringEntity body = new StringEntity(jsonmessage, HTTP.UTF_8); body.setContentType("application/json; charset=utf-8"); httppost.setEntity(body); // Execute HTTP Post Request HttpResponse response = httpclient.execute(httppost);` I still get the same 411 error.
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      1. PO
      1. USDavid Fekke
    2. COhmm. dont know why. what httpclient are you using? If you want to rethink your implementation of httpclient then you could do this: example - http://masl.cis.gvsu.edu/2010/04/05/android-code-sample-asynchronous-http-connections/ that is for async use of http and very good use of the network. Then - https://code.google.com/p/httpclientandroidlib/ for a lib that can be used to implement.
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      1. USRobert Rowntree
    3. COI have tried every API I could find. I have used the DefaultHttpClient, the loopj Async client, the HttpURLConnection with the same results. The whole thing blows up when I set one of the headers.
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      1. USDavid Fekke
 

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