[android-developers] Re: HttpURLConnection with POST method

I may post this to a new subject, but I'll try here. Two days after
giving this code sample, I found it doesn't work on Android ver. 2.3!
My phone (LG Ally) and emulator were running version 2.2.2 & the code
below was working fine. I had a co-worker run the program on his phone
& it didn't work. His phone was an HTC running 2.3. So, I changed my
emulator to version 2.3 and sure enough it didn't work in the same
way. GET was working, but POST did not on 2.3. Well... actually the
Response code was the same, 200, so it worked right? But, the value it
returned was null. I've been trying to find any mention of a
difference like this between versions on this list, but no luck so
far. The only clue I have is that a bit after a try at a POST, I get

SntpClient Request time failed: java.net.socketException: Address
family not supported by protocol

I'm not sure that is related to this problem, but it's all I have to
go on so far (that and it works on 2.2 and not 2.3!)

Anybody have any ideas about this problem?

Alan

On Sep 14, 1:26 pm, Alan <alans_1...@yahoo.com> wrote:
> Thank you so much for sharing that link... it helped me a great deal.
> I wound up combining parts of that code with others to come up with
> this:
>
> /* Note: these are some methods in a class I wrote. "mURLString" is
> the url to
> *       talk to such as "http://somesite/somefile.php"; "parameters" are the
> parameters to use for the POST, such
> *       as "param1=abc&param2=def&param3=ghi".  I create the string in
> similar way to his example which was like:
> *
> *        String parameters = "param1=" +
> URLEncoder.encode("abc","UTF-8")+
> *                      "&param2="+URLEncoder.encode("def","UTF-8")+
> *                      "&param3="+URLEncoder.encode("ghi","UTF-8");
> *
> *       The result of the POST is returned in "resultString".
> */
>
> public String doHttpPost( String parameters )
> {
>         String resultString = null;
>
>         URL url = null;
>        HttpURLConnectionurlConnection = null;
>
>         try {
>                 url = new URL( mURLString );
>         } catch (MalformedURLException e)
>         {
>                 // TODO Auto-generated catch block
>                 e.printStackTrace();
>         }
>
>         try {
>                 urlConnection = (HttpURLConnection) url.openConnection();
>                 urlConnection.setDoOutput(true);
>                 urlConnection.setRequestMethod("POST");
>
> urlConnection.setFixedLengthStreamingMode(parameters.getBytes().length);
>
>                 //send the POST out
>                 PrintWriter out = new PrintWriter(urlConnection.getOutputStream());
>                 out.print(parameters);
>                 out.close();
>
>                 int response = urlConnection.getResponseCode();
>                 // if resonse =HttpURLConnection.HTTP_OK = 200, then it worked.
>
>                 InputStream in = new
> BufferedInputStream(urlConnection.getInputStream());
>                 resultString = readStream(in);
>
>         } catch( Exception e ){
>                 e.printStackTrace();
>         }
>         finally {
>                 urlConnection.disconnect();
>         }
>
>         return resultString;
>   }
>
>   public static String readStream(InputStream in) throws IOException
>   {
>         StringBuilder sb = new StringBuilder();
>         BufferedReader r = new BufferedReader(new InputStreamReader(in),
> 1000);
>
>         for (String line = r.readLine(); line != null; line = r.readLine())
> {
>                 sb.append(line).append("\n");
>         }
>
>         in.close();
>
>         return sb.toString();
>   }
>
> On Aug 30, 1:06 pm, jesb <budiat...@gmail.com> wrote:
>
> > i figured it out.http://digitallibraryworld.com/?p=189
>
> > On Aug 16, 3:21 pm, lbendlin <l...@bendlin.us> wrote:
>
> > >POSTworks very different from GET. You need to spend much more energy to
> > > format the request body. You're missing the whole Content-Disposition:
> > > form-data  and the delimiter definitions etc.
>
> > > your out.write should then use the prepared request body string (as you did,
> > > sort of).
>
>

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