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POHttpURLConnection Not Sending Post Data
 

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    <p>I have been following the steps <a href="https://stackoverflow.com/a/2793153/620197">outlined here</a> for uploading files via the <code>HttpURLConnection</code>. In my case, there is POST parameter named "json," which needs to pulled out of <code>_POST['json']</code> on the server.</p> <p>The issue is, there is nothing in <code>_POST['json']</code>, except when I attempt to upload a file; the file data is placed in <code>_POST['json']</code>, instead of <code>_FILES['filename']</code>.</p> <p>The goal is to achieve this:</p> <pre><code>_POST['json'] = {"fileData":"Some extra data about the file(s)"} _FILES['filename'] = the file I uploaded. </code></pre> <p>My Code where I build the request is:</p> <pre><code>try { url = new URL(_requestObject.getUrl()); conn = (HttpURLConnection)url.openConnection(); conn.setRequestProperty("Content-Type", MMWebAPIConstants.MM_REQUEST_CONTENT_TYPE_HF + MMWebAPIConstants.MM_REQUEST_BOUNDARY); conn.addRequestProperty("Connection", "Keep-Alive"); conn.setRequestMethod("POST"); conn.setDoInput(true); conn.setDoOutput(true); conn.setUseCaches(false); if ( ! _requestObject.getAction().equals(MMWebAPIConstants.ACTION_LOGIN) ) { for ( String cookie : MMSessionManager.getSharedInstance().getCookies() ) conn.addRequestProperty("Cookie", cookie); } outstream = conn.getOutputStream(); writer = new PrintWriter(new OutputStreamWriter(outstream, "UTF-8"), true); writer.append("--" + MMWebAPIConstants.MM_REQUEST_BOUNDARY).append(crlf); writer.append("Content-Disposition: form-data; name=\"json\"").append(crlf); writer.append("Content-Type: text/plain; charset=UTF-8").append(crlf); writer.append(postValue.toString()).append(crlf).flush(); if ( hasfiles ) { byte[] bytes = null; InputStream input = null; for ( String filename : _requestObject.getFilePaths() ) { String filepath = this.getContext().getFilesDir().getAbsolutePath() + "/" + filename; String type = URLConnection.guessContentTypeFromName(filename); bytes = new byte[5120]; input = new FileInputStream(filepath); writer.append("--" + MMWebAPIConstants.MM_REQUEST_BOUNDARY).append(crlf); writer.append("Content-Disposition: form-data; name=\"" + filename + "\"; filename=\"" + filename + "\"").append(crlf); writer.append("Content-Type: " + type).append(crlf); writer.append("Content-Transfer-Encoding: binary").append(crlf); writer.append(crlf).flush(); for ( int l = 0; (l = input.read(bytes)) &gt; 0; ) { outstream.write(bytes, 0, l); } outstream.flush(); writer.append(crlf).flush(); } } writer.append("--" + MMWebAPIConstants.MM_REQUEST_BOUNDARY + "--").append(crlf); responseObject = this.getResponse(conn); this.getCookiesFromRequest(conn); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if ( writer != null ) writer.close(); if ( conn != null ) conn.disconnect(); } </code></pre> <p>And the post and files array looks like:</p> <pre><code>ERROR - 2012-08-02 18:49:59 --&gt; POST: Array ( [json] =&gt; PNG IHDR#JzsBIT|d 4IDATx͒7rcd).`Tv-IHMH @55k.c_@qّ)f3Zz*UK%귿6}OGI~IJ~:M|@eӼXw|0`?b Fլq^$zAn.;Cضo= 9J2O; e:=Md?DI{a;Lr56xA+~ҍZO|{orB{Iu&lt;VkWL&lt;x&lt;m=+ȡhE5$:ͲI\k `9_5Ofx7EX"D#'NO:ƧjS+uj:gjP=,rɳW3I s&gt;DM4ޖ)մ_*``@JZ6(ʝZ3\ u5삮*rת@Rkc$o=JRs$%aϮi]ځl;]Q7lI6K \ `L?OAsشZQOٍߍ*Y7VyoZuJYq,iM`SyYUSJfjѮf["0%y5N_0Z5"\ߚ$/fC!-ca^Mpfizvߚ???,)ak"_bUE&gt;ml,BcMSB[7y')O7I7c&gt;m3;Or6]qrAfe8t]I&gt;0Zc!6Ϡ8 YT0\YA\?&lt;#'GXGI^c"&lt;Ͳ]cU;k$'y/z$Ƣ&amp;N g&lt;-0Џr'IRJAŗ9|ʉj3IL[Yo&lt;fugq2;-acY[cw/Ô#,U /X"0x,k&gt;uF&amp;LRN$snu;דO ~M&lt;/aSQ[Sy˶&lt;*z`(RByP4Wh `L1=X s3ٖ'9VaJ WML 0&amp;|k:MB|LRNĚU&lt;S|z`AWt7010&amp;)'v/z%{cn=6lU9dW]"۔Ϫ&lt;LFH_cNoy.0&amp;SNT"fR.{0* `l&lt;RKr&lt;Ͳ?O;ÔxyػI~lU;=Jr@] yMa&amp;y=W}cbrƬs)aO_!&lt;`삣$ea. jUC~ơ+=6Zu-!8HfJ.B `@MRNDW }\wlҽ$$ߏ=`@]%ɿ9 Uɓq͗g)!Ъ*b!0H `4q|=LVO7&gt;#MW*yp. A͔m_/srr|We!]} 7GI˫OojRBK&gt;gDK~@|܀W????[v9M8K9V4.Gtq܅'9+zؼU!U5z8:)Mr'9dy~ZB5IxE40 (Ƀ&amp;NRNk(46+ܩU;}5ZnGI(EpA;I.n2Cۣ'`4pj5A] ס &amp;ݱwb&lt;gxGY .nqS*͞0СiسjV4uUߴvB2 !NV~r[;i`@5M n,k:٬خI4ZԾ6uIt1.Xs [Jg8ZW$tqQ)ByM3i/moJ@1mo7XnFi=&amp;ͪWBU}Sp%i%xjMIENDB` ) ERROR - 2012-08-02 18:49:59 --&gt; FILES: Array ( ) </code></pre> <p><strong>UPDATE</strong>:</p> <p>As a trial, I tried following <a href="https://stackoverflow.com/q/8900337/620197">this thread</a> (which threw a runtime exception), and I tried without the file upload, which does not populate <code>_POST['json']</code>, but still threw a runtime exception.</p> <p>Sill looking for some help on this please.</p>
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