I am using this code to send data to the site where my gae-python app is deployed .But I dont know how to receive it on the other end.
protected void tryLogin(String mUsername, String mPassword)
{
HttpURLConnection connection;
OutputStreamWriter requestself = null;
URL url = null;
String response = null;
String parameters = "username="+mUsername+"&password="+mPassword;
try
{
url = new URL("http://www.pranshutrial3.appspot.com");
connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestMethod("POST");
requestself = new OutputStreamWriter(connection.getOutputStream());
requestself.write(parameters);
requestself.flush();
requestself.close();
String line = "";
InputStreamReader isr = new InputStreamReader(connection.getInputStream());
BufferedReader reader = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
// Response from server after login process will be stored in response variable.
response = sb.toString();
// You can perform UI operations here
Toast.makeText(this,"Message from Server: \n"+ response, Toast.LENGTH_LONG).show();
isr.close();
reader.close();
}
catch(IOException e)
{
// Error
}
}
Related
Good afternoon. I am trying to connect Android app to http://localhost:3000/ ( but in code I use an emulator's ip).
The error is "W/System.err: java.net.ConnectException: Connection refused"
Could you help me to find an error? Other posts were not useful for me.
public String execute() {
String line;
StringBuilder outputStringBuilder = new StringBuilder();
try {
StringBuilder urlString = new StringBuilder(baseUrl + urlResource);
if (!urlPath.equals("")) {
urlString.append("/" + urlPath); }
if (parameters.size() > 0 && httpMethod.equals("POST")) {
payload = getPayloadAsString();
urlString.append("?" + payload); }
URL url = new URL(urlString.toString());
String encoding = Base64Encoder.encode(email + ":" + password);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod(httpMethod);
connection.setRequestProperty("Authorization", "Basic " + encoding);
connection.setRequestProperty("Accept", "application/json");
connection.setRequestProperty("Content-Type", "text/plain");
connection.connect();
if (httpMethod.equals("GET") || httpMethod.equals("PUT")) {
payload = getPayloadAsString();
connection.setDoInput(true);
connection.setDoOutput(true);
try {
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
writer.write(payload);
headerFields = connection.getHeaderFields();
BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while ((line = br.readLine()) != null) {
outputStringBuilder.append(line);
}
} catch (Exception ex) {}
connection.disconnect();
}
else {
InputStream content = (InputStream) connection.getInputStream();
headerFields = connection.getHeaderFields();
BufferedReader in = new BufferedReader(new InputStreamReader(content));
while ((line = in.readLine()) != null) {
outputStringBuilder.append(line);} }
} catch (Exception e) {
e.printStackTrace(); }
if (!outputStringBuilder.toString().equals("")) {
lastResponse = outputStringBuilder.toString(); }
return outputStringBuilder.toString(); }}
I want to send a mp3 file using POST request from android studio to a flask server. I have read an mp3 file from device and stored in input stream object. The flask server identifies the request to be a POST request and creates the mp3 file. But when I play the mp3 file it does not work. So the connection part does not have any problem. I would like to know how to send this inputstream object in my POST request and get it successfully play the mp3 file on the server (Raspberry Pi).
The part to get the mp3 file and store in inputstream:
if(!DocumentsContract.isDocumentUri(this, data.getData()))
throw new RuntimeException("Not a documentsContract document");
try {
InputStream is = getContentResolver().openInputStream(data.getData());
new Main4Activity.httpAsyncTask417().execute();
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
The part of sending the POST request:
public class httpAsyncTask417 extends AsyncTask<String, Void, Void> {
#Override
protected Void doInBackground(String... strings) {
try {
String url="http://172.17.57.132/post_songs";
URL obj=new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
//add reuqest header
con.setRequestMethod("POST");
String urlParameters = "content=";
// Send post request
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(urlParameters);
wr.flush();
wr.close();
int responseCode = con.getResponseCode();
Log.v("HTTPDelete_Check3", "Get returned: " + responseCode);
BufferedReader in = new BufferedReader(
new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
//print result
}catch(java.io.IOException ex) {
}
return null;
}
#Override
protected void onPostExecute(Void v) {
}
}
I solved the problem. Below is the solution.
The part to get the mp3 file and store in inputstream:
//if(!DocumentsContract.isDocumentUri(this, data.getData()))
// throw new RuntimeException("Not a documentsContract document");
try {
is = getContentResolver().openInputStream(data.getData());
uri=data.getData();
file_name=getFileName(uri);
new Main4Activity.httpAsyncTask417().execute();
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
The part of sending the POST request:
try {
String url="http://172.17.59.97/post_songs?title="+file_name;
URL obj=new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
//add reuqest header
con.setRequestMethod("POST");
// Send post request
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
/*BufferedReader r = new BufferedReader(new InputStreamReader(is));
String line;
while ((line = r.readLine()) != null) {
wr.writeBytes(line+'\n');
}*/
//wr.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"" + uri.toString() +"\"" + "\r\n");
byte []buffer = new byte[4096];
int read = 0;
while ( (read = is.read(buffer)) != -1 ) {
wr.write(buffer, 0, read);
}
wr.flush();
wr.close();
int responseCode = con.getResponseCode();
Log.v("HTTPDelete_Check3", "Get returned: " + responseCode);
BufferedReader in = new BufferedReader(
new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
//print result
}catch(java.io.IOException ex) {
}
I am trying to make a post from Java to make a market order using my Bitstamp account but the following code is returning a file not found for the URL.
It may be because of CSRF but I am unsure, if anyone has had any experience with the bitstamp API that would be great.
public static void postToken() throws IOException, JSONException {
URL url = null;
String sig = encode();
try {
url = new URL("https://www.bitstamp.net/api/v2/buy/market/" + feedbackType.toLowerCase() +"usd/");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(5000);//5 secs
connection.setReadTimeout(5000);//5 secs
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
JSONObject cred = new JSONObject();
cred.put("key",api_key);
cred.put("signature", sig);
cred.put("nonce", nonce);
cred.put("amount", feedback);
OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());
out.write(cred.toString());
out.flush();
out.close();
int res = connection.getResponseCode();
System.out.println(res);
InputStream is = connection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String line = null;
while((line = br.readLine() ) != null) {
Log.d(TAG, line);
}
connection.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
Error: W/System.err: java.io.FileNotFoundException: https://www.bitstamp.net/api/v2/buy/market/btcusd/
I'm trying to send push notifications via Appcelerator rest API through my java server. I've been able to login, but when I try to send the notification I get 422 error (Unprocessable entity)
Here´s my login:
String SENDER_ID = "55694f177eead29359bda190";
String API_KEY = "bRhpzjfpHakUkYeVGbCBoFLGpqLTeKIm";
String API_USR = "tuin";
String API_PAS = "tuin123";
String URL_ACS = "https://api.cloud.appcelerator.com/v1/";
URL url = null;
URLConnection uc = null;
String idSession=null;
try {
url = new URL(URL_ACS+"users/login.json?key="+API_KEY+"&login="+API_USR+"&password="+API_PAS+"");
uc = url.openConnection();
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
if (conn.getResponseCode() != 200) {
throw new Exception(conn.getResponseMessage());
}
InputStream is = conn.getInputStream();
BufferedReader rd = new BufferedReader(
new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line;
while ((line = rd.readLine()) != null) {
sb.append(line);
}
rd.close();
conn.disconnect();
String respuesta=sb.toString();
if(respuesta.contains("status\":\"ok") && respuesta.contains("code\":200") ){
int number=sb.indexOf("session_id");
String meta=sb.substring(number+13, number+60);
int fin=meta.indexOf("\"");
idSession=meta.substring(0, fin);
}else{
System.out.println("No ID");
}
} catch (Exception e) {
throw new Exception("Trouble "+e);
}
Then I try to send the notification
public String sendPush(String date,String name, String text, String title,String session_id) throws Exception{
String URL_ACS = "https://api.cloud.appcelerator.com/v1/";
String API_KEY = "bRhpzjfpHakUkYeVGbCBoFLGpqLTeKIm";
URL url = null;
HttpURLConnection uc = null;
String idSession=null;
try {
String rt=URL_ACS+"push_notification/notify.json?key="+API_KEY+"";
url=new URL(rt);
uc = (HttpURLConnection) url.openConnection();
uc.setDoInput(true);
uc.setDoOutput(true);
uc.setRequestProperty("Content-Type", "application/json");
uc.setRequestProperty("Accept", "application/json");
uc.setRequestProperty("Cookie","_session_id="+session_id);
JSONObject cred = new JSONObject();
JSONObject push = new JSONObject();
JSONObject chan = new JSONObject();
cred.put("alert","test");
cred.put("title","title");
cred.put("icon","icon_notifi");
cred.put("vibrate",true);
cred.put("sound","default");
push.put("payload",cred);
//chan.put("push_notification", push);
System.out.println(push.toString());
String responseJSON=push.toString().replace("{\"payload\":", "{channel=\"noti\",to_ids=\"everyone\",payload=");
OutputStreamWriter wr= new OutputStreamWriter(uc.getOutputStream());
wr.write(responseJSON);
if (uc.getResponseCode() != 200) {
throw new Exception(uc.getResponseMessage());
}
InputStream is = uc.getInputStream();
BufferedReader rd = new BufferedReader(
new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line;
while ((line = rd.readLine()) != null) {
sb.append(line);
}
rd.close();
uc.disconnect();
System.out.println("The content was: " + sb.toString());
} catch (Exception e) {
throw new Exception("Trouble: "+e);
}
return idSession;
}
In the second part I got 422 Error.
I got the same problem. I fixed changing to Admin: yes the user that I'm using.
http://docs.appcelerator.com/arrowdb/latest/#!/guide/admin_access
I can not see what is wrong with this code:
JSONObject msg; //passed in as a parameter to this method
HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
httpCon.setDoOutput(true);
httpCon.setDoInput(true);
httpCon.setUseCaches(false);
httpCon.setRequestProperty( "Content-Type", "application/json" );
httpCon.setRequestProperty("Accept", "application/json");
httpCon.setRequestMethod("POST");
OutputStream os = httpCon.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os, "UTF-8");
msg.write(osw);
osw.flush();
osw.close();
os.close(); //probably overkill
On the server, I am getting no post content at all, a zero length string.
Try
...
httpCon.setRequestMethod("POST");
httpCon.connect(); // Note the connect() here
...
OutputStream os = httpCon.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os, "UTF-8");
...
osw.write(msg.toString());
osw.flush();
osw.close();
to send data.
to retrieve data try:
BufferedReader br = new BufferedReader(new InputStreamReader( httpCon.getInputStream(),"utf-8"));
String line = null;
while ((line = br.readLine()) != null) {
sb.append(line + "\n");
}
br.close();
System.out.println(""+sb.toString());
public String sendHTTPData(String urlpath, JSONObject json) {
HttpURLConnection connection = null;
try {
URL url=new URL(urlpath);
connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("Accept", "application/json");
OutputStreamWriter streamWriter = new OutputStreamWriter(connection.getOutputStream());
streamWriter.write(json.toString());
streamWriter.flush();
StringBuilder stringBuilder = new StringBuilder();
if (connection.getResponseCode() == HttpURLConnection.HTTP_OK){
InputStreamReader streamReader = new InputStreamReader(connection.getInputStream());
BufferedReader bufferedReader = new BufferedReader(streamReader);
String response = null;
while ((response = bufferedReader.readLine()) != null) {
stringBuilder.append(response + "\n");
}
bufferedReader.close();
Log.d("test", stringBuilder.toString());
return stringBuilder.toString();
} else {
Log.e("test", connection.getResponseMessage());
return null;
}
} catch (Exception exception){
Log.e("test", exception.toString());
return null;
} finally {
if (connection != null){
connection.disconnect();
}
}
}`
call this methopd in doitbackground in asynctask
HttpURLConnection is cumbersome to use. With DavidWebb, a tiny wrapper around HttpURLConnection, you can write it like this:
JSONObject msg; //passed in as a parameter to this method
Webb webb = Webb.create();
JSONObject result = webb.post("http://my-url/path/to/res")
.useCaches(false)
.body(msg)
.ensureSuccess()
.asJsonObject()
.getBody();
If you don't like it, there is a list of alternative libraries on the link provided.
Why should we all write the same boilerplate code every day? BTW the code above is more readable and less error-prone. HttpURLConnection has an awful interface. This has to be wrapped!
Follow this example:
public static PricesResponse getResponse(EventRequestRaw request) {
// String urlParameters = "param1=a¶m2=b¶m3=c";
String urlParameters = Piping.serialize(request);
HttpURLConnection conn = RestClient.getPOSTConnection(endPoint, urlParameters);
PricesResponse response = null;
try {
// POST
OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream());
writer.write(urlParameters);
writer.flush();
// RESPONSE
BufferedReader reader = new BufferedReader(new InputStreamReader((conn.getInputStream()), StandardCharsets.UTF_8));
String json = Buffering.getString(reader);
response = (PricesResponse) Piping.deserialize(json, PricesResponse.class);
writer.close();
reader.close();
} catch (Exception e) {
e.printStackTrace();
}
conn.disconnect();
System.out.println("PricesClient: " + response.toString());
return response;
}
public static HttpURLConnection getPOSTConnection(String endPoint, String urlParameters) {
return RestClient.getConnection(endPoint, "POST", urlParameters);
}
public static HttpURLConnection getConnection(String endPoint, String method, String urlParameters) {
System.out.println("ENDPOINT " + endPoint + " METHOD " + method);
HttpURLConnection conn = null;
try {
URL url = new URL(endPoint);
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod(method);
conn.setDoOutput(true);
conn.setRequestProperty("Content-Type", "text/plain");
} catch (IOException e) {
e.printStackTrace();
}
return conn;
}
this without json String post data to server
class PostLogin extends AsyncTask<Void, Void, String> {
#Override
protected String doInBackground(Void... params) {
String response = null;
Uri.Builder builder= new Uri.Builder().appendQueryParameter("username","amit").appendQueryParameter("password", "amit");
String parm=builder.build().getEncodedQuery();
try
{
response = postData("your url here/",parm);
}catch (Exception e)
{
e.printStackTrace();
}
Log.d("test", "response string is:" + response);
return response;
}
}
private String postData(String path, String param)throws IOException {
StringBuffer response = null;
URL url = new URL(path);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
// connection.setRequestProperty("Content-Type", "application/json");
// connection.setRequestProperty("Accept", "application/json");
OutputStream out = connection.getOutputStream();
out.write(param.getBytes());
out.flush();
out.close();
int responseCode = connection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
response = new StringBuffer();
while ((line = br.readLine()) != null) {
response.append(line);
}
br.close();
}
return response.toString();
}