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    <p>The the first line should be simply your URL</p> <pre><code>String httpURL = "http://ip_of_my_server/phpServer/receiver2.php"; </code></pre> <p>And you should only send the json string to the server as request.</p> <p>instead of <code>byte[] request_body = httpURL.getBytes();</code> </p> <p>use <code>byte[] request_body = jsonString.getBytes();</code></p> <p>Here is the method for OS 5.0 and above </p> <pre><code>public static HttpConnection getHttpConnection(String url, byte[] postData) { HttpConnection conn = null; OutputStream out = null; try { conn = (HttpConnection) new ConnectionFactory().getConnection(url).getConnection(); if (conn != null) { if (postData == null) { conn.setRequestMethod(HttpConnection.GET); conn.setRequestProperty("User-Agent", "Profile/MIDP-2.0 Configuration/CLDC-1.0"); } else { conn.setRequestMethod(HttpConnection.POST); conn.setRequestProperty("Content-Length", String.valueOf(postData.length)); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty("User-Agent", "Profile/MIDP-2.0 Configuration/CLDC-1.0"); out = conn.openOutputStream(); out.write(postData); out.flush(); } if (conn.getResponseCode() != 0) { return conn; } } } catch (Exception e) { } finally { try { out.close(); } catch (Exception e2) { } } //Only if exception occurs, we close the connection. //Otherwise the caller should close the connection himself. try { conn.close(); } catch (Exception e1) { } return null; } </code></pre> <p>Here is the complete class if you want it to work with OS 4.2 and above. You may need to replace the constant COVERAGE_DIRECT by its value 1, if you want to compile it with &lt; 4.5.</p> <pre><code>public class ConnectionHelper { /** * Returns the working connection type. The connection types can be BIS, BES, TCP, WAP2, TCPIP */ public static HttpConnection getHttpConnection(String url, byte[] postData) { int[] preferredOrder = new int[] { CONNECTION_WIFI, CONNECTION_BIS, CONNECTION_BES, CONNECTION_UNITE, CONNECTION_WAP2, CONNECTION_TCPIP, }; for (int i = 0; i &lt; preferredOrder.length; i++) { int type = preferredOrder[i]; if (isPresent(type)) { HttpConnection conn = null; OutputStream out = null; try { conn = (HttpConnection) Connector.open(convertURL(type, url)); if (conn != null) { if (postData == null) { conn.setRequestMethod(HttpConnection.GET); conn.setRequestProperty("User-Agent", "Profile/MIDP-2.0 Configuration/CLDC-1.0"); } else { conn.setRequestMethod(HttpConnection.POST); conn.setRequestProperty(HttpProtocolConstants.HEADER_CONTENT_LENGTH, String.valueOf(postData.length)); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty("User-Agent", "Profile/MIDP-2.0 Configuration/CLDC-1.0"); out = conn.openOutputStream(); out.write(postData); out.flush(); } if (conn.getResponseCode() != 0) { return conn; } } } catch (Exception e) { } finally { try { out.close(); } catch (Exception e2) { } } } } // Only if exception occurs, we close the connection. // Otherwise the caller should close the connection himself. try { conn.close(); } catch (Exception e1) { } return null; } /** Stores transport ServiceBooks if found. Otherwise, null */ private static ServiceRecord srMDS, srWiFi, srBIS, srWAP2, srUnite; private static final int CONNECTION_DEFAULT = 0; private static final int CONNECTION_BIS = 1; private static final int CONNECTION_BES = 2; private static final int CONNECTION_TCPIP = 3; private static final int CONNECTION_WIFI = 4; private static final int CONNECTION_WAP2 = 5; private static final int CONNECTION_UNITE = 6; private static final int CONFIG_TYPE_BES = 1; private static final String UNITE_NAME = "Unite"; private static void checkTransportAvailability() { initializeTransportAvailability(); } /** * Initializes the ServiceRecord instances for each transport (if available). Otherwise leaves it null. Also determines if sufficient coverage is available for each transport * and sets coverage* flags. */ private static void initializeTransportAvailability() { ServiceBook sb = ServiceBook.getSB(); ServiceRecord[] records = sb.getRecords(); for (int i = 0; i &lt; records.length; i++) { ServiceRecord myRecord = records[i]; String cid, uid; if (myRecord.isValid() &amp;&amp; !myRecord.isDisabled()) { cid = myRecord.getCid().toLowerCase(); uid = myRecord.getUid().toLowerCase(); // BIS if (cid.indexOf("ippp") != -1 &amp;&amp; uid.indexOf("gpmds") != -1) { srBIS = myRecord; } // BES if (cid.indexOf("ippp") != -1 &amp;&amp; uid.indexOf("gpmds") == -1) { srMDS = myRecord; } // WiFi if (cid.indexOf("wptcp") != -1 &amp;&amp; uid.indexOf("wifi") != -1) { srWiFi = myRecord; } // Wap2.0 if (cid.indexOf("wptcp") != -1 &amp;&amp; uid.indexOf("wifi") == -1 &amp;&amp; uid.indexOf("mms") == -1) { srWAP2 = myRecord; } // Unite if (getConfigType(myRecord) == CONFIG_TYPE_BES &amp;&amp; myRecord.getName().equals(UNITE_NAME)) { srUnite = myRecord; } } } } /** * Gets the config type of a ServiceRecord using getDataInt below * * @param record * A ServiceRecord * @return configType of the ServiceRecord */ private static int getConfigType(ServiceRecord record) { return getDataInt(record, 12); } /** * Gets the config type of a ServiceRecord. Passing 12 as type returns the configType. * * @param record * A ServiceRecord * @param type * dataType * @return configType */ private static int getDataInt(ServiceRecord record, int type) { DataBuffer buffer = null; buffer = getDataBuffer(record, type); if (buffer != null) { try { return ConverterUtilities.readInt(buffer); } catch (EOFException e) { return -1; } } return -1; } /** * Utility Method for getDataInt() */ private static DataBuffer getDataBuffer(ServiceRecord record, int type) { byte[] data = record.getApplicationData(); if (data != null) { DataBuffer buffer = new DataBuffer(data, 0, data.length, true); try { buffer.readByte(); } catch (EOFException e1) { return null; } if (ConverterUtilities.findType(buffer, type)) { return buffer; } } return null; } private static String convertURL(int connectionType, String url) { switch (connectionType) { case CONNECTION_BES: url += ";deviceside=false"; break; case CONNECTION_BIS: url += ";deviceside=false" + ";ConnectionType=mds-public"; break; case CONNECTION_TCPIP: url += ";deviceside=true"; break; case CONNECTION_WIFI: url += ";interface=wifi"; break; case CONNECTION_WAP2: url += ";deviceside=true;ConnectionUID=" + srWAP2.getUid(); break; case CONNECTION_UNITE: url += ";deviceside=false;ConnectionUID=" + srUnite.getUid(); break; } return url; } private static boolean isPresent(int connectionType) { checkTransportAvailability(); switch (connectionType) { case CONNECTION_BIS: return (srBIS != null &amp;&amp; CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_BIS_B)); case CONNECTION_BES: return (srMDS != null &amp;&amp; CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_MDS)); case CONNECTION_WIFI: return (srWiFi != null &amp;&amp; CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_DIRECT, RadioInfo.WAF_WLAN, false)); case CONNECTION_TCPIP: return (CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_DIRECT)); case CONNECTION_WAP2: return (srWAP2 != null &amp;&amp; CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_DIRECT)); case CONNECTION_UNITE: return (srUnite != null &amp;&amp; CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_MDS)); case CONNECTION_DEFAULT: return true; } return false; } } </code></pre> <p>And finally post your data.</p> <pre><code>public void sendJson(String jsonString) { String httpURL = "http://ip_of_my_server/phpServer/receiver2.php"; HttpConnection httpConn = null; try { httpConn = getHttpConnection(httpURL, jsonString.getBytes()); if(httpConn.getResponseCode() == 200) { //If you need the output, then read it. Otherwise comment it. byte[] data = IOUtilities.streamToBytes(httpConn.openInputStream()); String response = new String(data); System.out.println("!!!!!!!!!!!!!! Response is: " + response); } } catch (Exception e) { } finally { try { httpConn.close(); } catch (Exception e2) { } } } </code></pre>
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    1. COI don't know if it's strictly **necessary**, but the code I have that does this also includes the line `httpConn.setRequestProperty(HttpProtocolConstants.HEADER_CONTENT_LENGTH, String.valueOf(request_body.length));` before writing to `_outStream`.
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    2. COYes, It is a good practice to provide Content-Length since some servers would not accept the post request without it. However, the OP's server seems to work without the it.
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    3. COThank you very much for your answer adwiv , and for your useful comment @Nate , really appreciate it. Yes now works perfectly and is exactly what i was looking for. One more tip though if you like. The response variable that you see in the code is always null. Is it supposed to behave like this? Also i saw this answer here http://stackoverflow.com/questions/8969666/http-post-blackberry-null-response/8981963#8981963 where they take different kind of actions according to the response. Should i do smth like that here too? If yes how would it look like?
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