问题
I am trying to send a json string , from my BlackBerry OS < 7.X application to my Server. I am trying to use an HTTP Post request. What i have done so far is :
String httpURL = "http://ip_of_my_server/phpServer/receiver2.php/" + jsonString;
try {
HttpConnection httpConn;
httpConn = (HttpConnection) Connector.open(httpURL + getConnectionString());
httpConn.setRequestMethod(HttpConnection.POST);
httpConn.setRequestProperty("Content-Type", "application/json; charset=utf-8");
DataOutputStream _outStream = new DataOutputStream(httpConn.openDataOutputStream());
byte[] request_body = httpURL.getBytes();
for (int i = 0; i < request_body.length; i++) {
_outStream.writeByte(request_body[i]);
}
DataInputStream _inputStream = new DataInputStream(httpConn.openInputStream());
StringBuffer _responseMessage = new StringBuffer();
int ch;
while ((ch = _inputStream.read()) != -1) {
_responseMessage.append((char) ch);
}
String res = (_responseMessage.toString());
String response = res.trim();
System.out.println("!!!!!!!!!!!!!! Response is: " + response);
httpConn.close();
} catch (Exception e) {
Dialog.alert("Error - " + e.toString());
}
The code works in a way that i dont fully understand. The author of the above code suggested to use as an httpURL the URL of the server + my json string. The final result is that on my server instead of arriving the json string , is arriving a string like that :
http://ip_of_my_server/phpServer/receiver2.php/ + jsonString
I am not familiar with java. I have previously done this for WP7 and iOS and in the httpUrl i put my servers URL and then with a command i was "appending" my json string to the http request and everything worked as expected.
How can i append the json string to the above HttpRequest , instead of adding it to the URL so that in the server arrives the JSON String only?
EDIT (providing the rest of the code that was used)
//used to specify connection type ( wifi - 3g - etc )
public static String getConnectionString() {
String connectionString = null;
// Wifi is the preferred transmission method
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 unnecessarily
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";
}
System.out.println("!!!!!!!!!!!!!! Connection type is: " + connectionString);
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;
}
回答1:
The the first line should be simply your URL
String httpURL = "http://ip_of_my_server/phpServer/receiver2.php";
And you should only send the json string to the server as request.
instead of byte[] request_body = httpURL.getBytes();
use byte[] request_body = jsonString.getBytes();
Here is the method for OS 5.0 and above
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;
}
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 < 4.5.
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 < 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 < records.length; i++) {
ServiceRecord myRecord = records[i];
String cid, uid;
if (myRecord.isValid() && !myRecord.isDisabled()) {
cid = myRecord.getCid().toLowerCase();
uid = myRecord.getUid().toLowerCase();
// BIS
if (cid.indexOf("ippp") != -1 && uid.indexOf("gpmds") != -1) {
srBIS = myRecord;
}
// BES
if (cid.indexOf("ippp") != -1 && uid.indexOf("gpmds") == -1) {
srMDS = myRecord;
}
// WiFi
if (cid.indexOf("wptcp") != -1 && uid.indexOf("wifi") != -1) {
srWiFi = myRecord;
}
// Wap2.0
if (cid.indexOf("wptcp") != -1 && uid.indexOf("wifi") == -1 && uid.indexOf("mms") == -1) {
srWAP2 = myRecord;
}
// Unite
if (getConfigType(myRecord) == CONFIG_TYPE_BES && 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 && CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_BIS_B));
case CONNECTION_BES:
return (srMDS != null && CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_MDS));
case CONNECTION_WIFI:
return (srWiFi != null && CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_DIRECT, RadioInfo.WAF_WLAN, false));
case CONNECTION_TCPIP:
return (CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_DIRECT));
case CONNECTION_WAP2:
return (srWAP2 != null && CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_DIRECT));
case CONNECTION_UNITE:
return (srUnite != null && CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_MDS));
case CONNECTION_DEFAULT:
return true;
}
return false;
}
}
And finally post your data.
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) {
}
}
}
来源：https://stackoverflow.com/questions/16149958/http-post-request-on-blackberry