send a JSON request with JSONObject as parameter? - android-json-rpc

Question

I want to make an android-json request to a webservice with httpClient.
The method which i try to call is "authenticate"
The request should have the following structure:
{"id":"ID","method":"authenticate","params":{"user":"ANDROID",
"password":"PASSWORD", "client":"CLIENT"},"jsonrpc":"2.0"}
mandatory parameter: ?school=SCHOOLNAME
This is what i have tried:
class MyAsnycTask extends AsyncTask<String, String, String>{
protected String doInBackground(String... params) {
String apiUrl = "https://arche.webuntis.com/WebUntis/jsonrpc.do";
JSONObject jsonParams = new JSONObject();
JSONObject params1 = new JSONObject();
HttpClient client = new DefaultHttpClient();
// Prepare a request object
HttpPost post = new HttpPost(apiUrl);
post.setHeader("Content-type", "application/json");
try {
params1.put("?school","litec");
params1.put("user", "40146720133271");
params1.put("password", "1234567");
jsonParams.put("id", "ID");
jsonParams.put("method", "authenticate");
jsonParams.put("params", params1);
jsonParams.put("jsonrpc", "2.0");
StringEntity se = new StringEntity(jsonParams.toString());
post.setEntity(se);
} catch (JSONException e1) {
e1.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
// Execute the request
try {
HttpResponse response = client.execute(post);
Log.d("log_response: ", response.getStatusLine().toString());
// Get hold the response entity
HttpEntity entity = response.getEntity();
// if the response does not enclose the entity, there is no need
// to worry about it
if(entity != null){
// a simple JSON Response read
InputStream instream = entity.getContent();
String result;
// convert content of response to bufferedreader
BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null){
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
}finally{
try{
instream.close();
}catch(IOException exp){
exp.printStackTrace();
}
}
result = sb.toString();
Log.d("Result of the Request: ", result);
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "OK";
}
protected String doInBackground(String result) {
return result;
// TODO Auto-generated method stub
}
}
After executing this, i get the request:
{"jsonrpc":"2.0","id":"error","error":{"message":"invalid schoolname","code":-8500}}
So its telling me that our schoolname is false.
So what can i do, is my way to pass parameters wrong ?

Answer 1

I saw your question some time ago, but I was not able to answer. I'm working with the WebUntis API as well, and I dont know if you solved the error, but it is a simple error in the url. As mentionend in the API, the mandatory paramter for the method 'authenthicate' is ?school=SCHULNAME. Your Url in the code is 'https://arche.webuntis.com/WebUntis/jsonrpc.do', but the mandatory parameter SCHULNAME is not given. Your Url should look like this: https://arche.webuntis.com/WebUntis/jsonrpc.do?school=SCHULNAME. Maybe you have to add the length of your request. E.g. if you use the method authenthicate: {"id":"ID","method":"authenticate","params":{"user":"USR", "password":"PW", "client":"MyApp"},"jsonrpc":"2.0"}
In this case length would be 109. I hope this helped, even if the question is over a month old. For other Googlers: If you are not using an AsyncTask, you have to return true, not ok.
EDIT:
The code looks like this (I haven't tested this yet, I hope it works):
class MyAsnycTask extends AsyncTask<String, String, String>{
protected String doInBackground(String... params) {
String apiUrl = "https://arche.webuntis.com/WebUntis/jsonrpc.do?school=SCHULNAME"; //Changes here
JSONObject jsonParams = new JSONObject();
JSONObject params1 = new JSONObject();
HttpClient client = new DefaultHttpClient();
// Prepare a request object
HttpPost post = new HttpPost(apiUrl);
post.setHeader("Content-type", "application/json");
try {
params1.put("user", "40146720133271");
params1.put("password", "1234567");
params1.put("client", "seriouslysAndroidApp"); //You can change the name
jsonParams.put("id", "ID");
jsonParams.put("method", "authenticate");
jsonParams.put("params", params1);
jsonParams.put("jsonrpc", "2.0");
StringEntity se = new StringEntity(jsonParams.toString());
post.setHeader("Content-length",""+se.getContentLength()); //header has to be set after jsonparams are complete
post.setEntity(se);
} catch (JSONException e1) {
e1.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
// Execute the request
try {
HttpResponse response = client.execute(post);
Log.d("log_response: ", response.getStatusLine().toString());
// Get hold the response entity
HttpEntity entity = response.getEntity();
// if the response does not enclose the entity, there is no need
// to worry about it
if(entity != null){
// a simple JSON Response read
InputStream instream = entity.getContent();
String result;
// convert content of response to bufferedreader
BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null){
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
}finally{
try{
instream.close();
}catch(IOException exp){
exp.printStackTrace();
}
}
result = sb.toString();
Log.d("Result of the Request: ", result);
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "OK";
}
protected String doInBackground(String result) {
return result;
// TODO Auto-generated method stub
}