Android Volley POST body request recieved EMPTY at backend - json

Question

i'm using the following code to post a json object to php server :
Map<String, String> paramsMap = new HashMap<String, String>();
paramsMap.put("tag", "jsonParams");
JSONObject jsonObject = new JSONObject(paramsMap);
Log.d("JSON", jsonObject.toString());
JsonObjectRequest jsonRequest = new JsonObjectRequest(Request.Method.POST, url, jsonObject,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.d("JSON RESPONSE", response.toString());
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.d("JSON ERROR", error.getMessage());
}
});
requestQ.add(jsonRequest);
and using this to receive the object in php:
$body = '';
$handle = fopen('php://input','r');
while(!feof($handle)){
$body .= fread($handle,1024);
}
$logger->log("login request","request body: ".$body);
the problem is that the $body is always empty i used FIDDLER to check my HTTP request and it's there as raw data like this : {"tag":"jsonParams"}
so what am i messing ?
thx in advance.

Answer 1

I know this is an old question, but for future readers...
I have solved the exact same problem by using StringRequest instead of JsonObjectRequest. The constructor differs just very slightly and you can then easily parse string response to JsonObject like this:
JSONObject response = new JSONObject(responseString);

Answer 2

Not sure what was your problem, but for the future googlers:
My problem was that I wasn't reading from php://input
Full code (working):
Java:
JSONObject jsonobj; // declared locally so that it destroys after serving its purpose
jsonobj = new JSONObject();
try {
// adding some keys
jsonobj.put("new key", Math.random());
jsonobj.put("weburl", "hashincludetechnology.com");
// lets add some headers (nested JSON object)
JSONObject header = new JSONObject();
header.put("devicemodel", android.os.Build.MODEL); // Device model
header.put("deviceVersion", android.os.Build.VERSION.RELEASE); // Device OS version
header.put("language", Locale.getDefault().getISO3Language()); // Language
jsonobj.put("header", header);
// Display the contents of the JSON objects
display.setText(jsonobj.toString(2));
} catch (JSONException ex) {
display.setText("Error Occurred while building JSON");
ex.printStackTrace();
}
JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.POST, URL, jsonobj, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
System.out.println("onResponse()");
try {
result.setText("Response: " + response.toString(2))
System.out.println("Response: " + response.toString(2));
} catch (JSONException e) {
display.setText("Error Occurred while building JSON");
e.printStackTrace();
}
//to make sure it works backwards as well
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
System.out.println("onErrorResponse()");
System.out.println(error.toString());
}
});
System.out.println("After the request is made");
// Add the request to the RequestQueue.
queue.add(jsObjRequest);
Clarification: display and result are two TextView objects I am using to display data on the screen, and queue is Volley's request queue.
PHP:
$inp = json_decode(file_get_contents('php://input')); //$input now contains the jsonobj
echo json_encode(["foo"=>"bar","input"=>$inp]); //to make sure we received the json and to test the response handling
Your Android Monitor should output sth. like :
{
"foo":"bar",
"input":{
"new key":0.8523024722406781,
"weburl":"hashincludetechnology.com",
"header": {
"devicemodel":"Android SDK built for x86",
"deviceVersion":"7.1",
"language":"eng"
}
}
}