Blackberry HttpConnection failure on device - http

Question

I'm after some BlackBerry suggestions again. I'm developing a REST based app using the standard BB code that appends to the URI connection string (I'll post if you like but don't want to take up space here as I suspect that those of you that know about this know exactly what I mean).
The code works fine in the emulator in MDS mode and is good on the phone too with straight WiFi.
Now, the problem is when I come to use 3G on an actual phone. At that point it fails. Is this some kind of transcoding problem?
I'm using a raw HttpConnection.
An HTTP POST works (with body info) but the GET (which uses a cookie for auth purposes as a header requestproperty) fails.
The failure is only with header (GET) based info on non WiFi connections on the mobile device.
Any suggestions would be most appreciated.
public static String httpGet(Hashtable params, String uriIn) {
String result = null;
LoginDetails loginDetails = LoginDetails.getInstance();
HttpConnection _connection;
String uri = uriIn + "?api_key=" + loginDetails.getApi_key();
Enumeration e = params.keys();
// iterate through Hashtable keys Enumeration
while (e.hasMoreElements()) {
String key = (String) (e.nextElement());
String value = (String) params.get(key);
uri += "&" + key + "=" + value;
}
uri = uri + HelperMethods.getConnectionString();
try {
_connection = (HttpConnection) Connector.open(uri);
_connection.setRequestMethod(HttpConnection.GET);
_connection.setRequestProperty("Content-Type",
"text/plain; charset=UTF-8");
_connection.setRequestProperty("x-rim-authentication-passthrough",
"true");
_connection.setRequestProperty("Cookie", loginDetails.getCookie());
_connection.setRequestProperty("Content-Type", "application/json");
String charset = "UTF-8";
_connection.setRequestProperty("Accept-Charset", charset);
_connection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded;charset=" + charset);
OutputStream _outputStream = _connection.openOutputStream();
int rc = _connection.getResponseCode();
InputStream _inputStream = _connection.openInputStream();
ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
int ch;
while ((ch = _inputStream.read()) != -1) {
bytestream.write(ch);
}
result = new String(bytestream.toByteArray());
bytestream.close();
{
if (_outputStream != null)
try {
_outputStream.close();
} catch (Exception e1) {
}
if (_connection != null)
try {
_connection.close();
} catch (Exception e2) {
}
}
} catch (IOException e3) {
// TODO Auto-generated catch block
e3.printStackTrace();
}
return result;
}
And this uses:
public synchronized static String getConnectionString() {
String connectionString = null;
// Simulator behaviour is controlled by the USE_MDS_IN_SIMULATOR
// variable.
if (DeviceInfo.isSimulator()) {
connectionString = ";deviceside=true";
}
// Wifi is the preferred transmission method
else if (WLANInfo.getWLANState() == WLANInfo.WLAN_STATE_CONNECTED) {
connectionString = ";interface=wifi";
}
// Is the carrier network the only way to connect?
else if ((CoverageInfo.getCoverageStatus() & CoverageInfo.COVERAGE_DIRECT) == CoverageInfo.COVERAGE_DIRECT) {
String carrierUid = getCarrierBIBSUid();
if (carrierUid == null) {
// Has carrier coverage, but not BIBS. So use the carrier's TCP
// network
connectionString = ";deviceside=true";
} else {
// otherwise, use the Uid to construct a valid carrier BIBS
// request
connectionString = ";deviceside=false;connectionUID="+carrierUid + ";ConnectionType=mds-public";
}
}
// Check for an MDS connection instead (BlackBerry Enterprise Server)
else if ((CoverageInfo.getCoverageStatus() & CoverageInfo.COVERAGE_MDS) == CoverageInfo.COVERAGE_MDS) {
connectionString = ";deviceside=false";
}
// If there is no connection available abort to avoid hassling the user
// unnecssarily.
else if (CoverageInfo.getCoverageStatus() == CoverageInfo.COVERAGE_NONE) {
connectionString = "none";
}
// In theory, all bases are covered by now so this shouldn't be reachable.But hey, just in case ...
else {
connectionString = ";deviceside=true";
}
return connectionString;
}
/**
* Looks through the phone's service book for a carrier provided BIBS
* network
*
* #return The uid used to connect to that network.
*/
private synchronized static String getCarrierBIBSUid() {
ServiceRecord[] records = ServiceBook.getSB().getRecords();
int currentRecord;
for (currentRecord = 0; currentRecord < records.length; currentRecord++) {
if (records[currentRecord].getCid().toLowerCase().equals("ippp")) {
if (records[currentRecord].getName().toLowerCase()
.indexOf("bibs") >= 0) {
return records[currentRecord].getUid();
}
}
}
return null;
}

Answer 1

Fixed - see above.
It turns out that there were spaces in the uri's.
Quite why this worked over WiFi & not 3G etc. is still puzzling.