Android Post request not posting any data on server - java

=====Updated========
Actually below code is fine, My problem is at server side.
=====Updated========
Below is my code,I am using HttpURLConnection but not able to send JSON data to server.
Please help me Thanks in advance
JSONObject jo = new JSONObject();
jo.put("ID", "25")
Log.e("test", jo.toString());
url = new URL(URL);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/json");
connection.setUseCaches(false);
connection.setDoInput(true);
connection.setDoOutput(true);
//Send request
DataOutputStream wr = new DataOutputStream(
connection.getOutputStream());
wr.writeBytes(jo.toString());
wr.flush();
wr.close();
//Get Response
InputStream is = connection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer sb = new StringBuffer();
int chr;
while ((chr = is.read()) != -1) {
sb.append((char) chr);
}
line = sb.toString();
Log.e("json_temp", line);
rd.close();


Your code is fine, it doesn't show a blank array, but a string "Array()". I tried a resource test, and that's exactly what it showed me.
If you type in the URL in the browser, you should see the same thing.

Related

How to use Satang "orders/user" API with java?

I've built java code to use satang "orders/user" api.
But got 405 error.
Please help me.
I've built placeLimitOrder() function.
And used successfully.
Then getUserOrders() function also made with same rult.
But this function got 405 error.
I can't find the reason.
public String getUserOrders (String pair,String limit,String offset,String status,String side)
{
String req="limit="+limit+"&offset="+offset+"&pair="+pair+"&side="+side+"&status="+status;
String operation="orders/user";
String signature=getSignature(req);
URL url = new URL(baseUrl+operation);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("POST");
con.setDoOutput( true );
con.setInstanceFollowRedirects( false );
con.setRequestProperty("Authorization", "TDAX-API "+this.key);
con.setRequestProperty("Signature",signature);
con.setRequestProperty("Content-Type", "application/json");
con.setRequestProperty("charset", "utf-8");
con.setRequestProperty("User-Agent", "java client");
con.setUseCaches( false );
JsonObject obj=new JsonObject();
obj.addProperty("limit", limit);
obj.addProperty("offset", offset);
obj.addProperty("pair", pair);
obj.addProperty("side", side);
obj.addProperty("status", status);
String json=obj.toString();
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(json);
wr.flush();
wr.close();
int responseCode=con.getResponseCode();
if(responseCode!=HttpURLConnection.HTTP_OK){
throw new BadResponseException(responseCode);
}
BufferedReader rd = new BufferedReader(new InputStreamReader(con.getInputStream()));
StringBuilder result = new StringBuilder();
String line;
while ((line = rd.readLine()) != null) {
result.append(line);
}
rd.close();
return result.toString();
}
Following code working well.
I can't find the reason.
public String placeLimitOrder(String amount,String pair,String price,String side) throws IOException, BadResponseException
{
Long lnonce=new Date().getTime();
String nonce=lnonce.toString();
String req="amount="+amount+"&nonce="+nonce+"&pair="+pair+"&price="+price+"&side="+side+"&type=limit";
String operation="orders/";
String signature=getSignature(req);
URL url = new URL(baseUrl+operation);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("GET");
con.setDoOutput( true );
con.setInstanceFollowRedirects( false );
con.setRequestProperty("Authorization", "TDAX-API "+this.key);
con.setRequestProperty("Signature",signature);
con.setRequestProperty("Content-Type", "application/json");
con.setRequestProperty("charset", "utf-8");
con.setRequestProperty("User-Agent", "java client");
con.setUseCaches( false );
JsonObject obj=new JsonObject();
obj.addProperty("amount", amount);
obj.addProperty("nonce", nonce);
obj.addProperty("pair", pair);
obj.addProperty("price", price);
obj.addProperty("side", side);
obj.addProperty("type", "limit");
String json=obj.toString();
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(json);
wr.flush();
wr.close();
int responseCode=con.getResponseCode();
if(responseCode!=HttpURLConnection.HTTP_OK){
throw new BadResponseException(responseCode);
}
BufferedReader rd = new BufferedReader(new InputStreamReader(con.getInputStream()));
StringBuilder result = new StringBuilder();
String line;
while ((line = rd.readLine()) != null) {
result.append(line);
}
rd.close();
return result.toString();
}

public String getUserOrders(String pair,String limit,String offset,String status,String side) throws IOException, BadResponseException
{
String req="limit="+limit+"&offset="+offset+"&pair="+pair+"&side="+side+"&status="+status;
String operation="orders/user?"+req;
String signature=getSignature("");
URL url = new URL(baseUrl+operation);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("GET");
con.setDoOutput( true );
con.setInstanceFollowRedirects( false );
con.setRequestProperty("Authorization", "TDAX-API "+this.key);
con.setRequestProperty("Signature",signature);
con.setRequestProperty("Content-Type", "application/json");
con.setRequestProperty("charset", "utf-8");
con.setRequestProperty("User-Agent", "java client");
con.setUseCaches( false );
int responseCode=con.getResponseCode();
if(responseCode!=HttpURLConnection.HTTP_OK){
throw new BadResponseException(responseCode);
}
BufferedReader rd = new BufferedReader(new InputStreamReader(con.getInputStream()));
StringBuilder result = new StringBuilder();
String line;
while ((line = rd.readLine()) != null) {
result.append(line);
}
rd.close();
return result.toString();
}

So if you are trying to do GET to https://api.tdax.com/api/orders/user
Headers should include:
Signature
Authentication
Query Parameters:
pair
limit
offset
status
side
From your code, it looks like you have put everything to the Signature.
Link to API docs
This is what you should fix:
URL. It should look like:
https://api.tdax.com/api/orders/user?pair=pairValue&limit=limitValue&offset=... add all the parameters and insert values.
Change request method to GET
Double-check your headers (Signature, Authentication).
Error code 405 - "bad request", which means most likely your request URL is bad. After you will fix URL, you should be able to get a different response code like 403/401 which should indicate that something is wrong with signature or authentication. In the best-case scenario, you will get 200 and then try to parse the JSON response.
Also, I don't recommend you to use HttpURLConnection, Generally, it’s NOT recommended to use this class, because the codebase is very old and outdated, it may not supports the new HTTP/2 standard, in fact, it’s really difficult to configure and use this class. Please consider using OkHttp, Apache HttpClient or other libraries.

I need to send a POST request to an api using an XML request structure in java

String urly = "myurl";
URL url = new URL(myurl);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type","application/xml");
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(xml);
wr.flush();
i am not sure whether this sends the request using xml request structure which is stored in String "xml". I dont know any other way to send request using XML.
int responseCode = con.getResponseCode();
System.out.println("Response Code : " + responseCode);
BufferedReader iny = new BufferedReader(new InputStreamReader(con.getInputStream()));
String output;
StringBuffer res = new StringBuffer();
while ((output = iny.readLine()) != null) {
res.append(output);
}
iny.close();
wr.close();
//printing result from response
System.out.println(res.toString());
The response i am getting shows Invalid Request.

The generated XML was wrong, it needed to be checked.

How to read restful response on client side in java for post

I have returning response to client as
return Response.status(200).entity("Data was succesfully loaded into database").build();
I have to read this on client my client code
URL url=new URL(urlString);
// URLConnection connection=url.openConnection();
//connection.setDoOutput(true);
HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
httpCon.setDoOutput(true);
httpCon.setRequestMethod("POST");
httpCon.setRequestProperty("Content-Type",
"application/json");
how to read these type of responses on client side

Once you have HttpURLConnection you can send data to the server (if this is needed, but looks like as it is, because you have POST request):
DataOutputStream wr = new DataOutputStream(httpCon.getOutputStream());
wr.writeBytes(yourData);
wr.flush();
wr.close();
Then you can check for response code (for e.g. if it is 200):
int responseCode = httpCon.getResponseCode();
And read data from response:
BufferedReader in = new BufferedReader(
new InputStreamReader(httpCon.getInputStream()));
String line;
StringBuffer response = new StringBuffer();
while ((line = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
If you want to parse JSON you can use org.json or Gson.

Java Servlet how to get the json response from Shopify API

I was trying to get the products record from shopify API through REST services. But I was getting this error {"errors":{"product":"can't be blank"}} Below is the snippet of the code.
String getURL = "https://myshop.myshopify.com/admin/products.json";
url = new URL(getURL);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setRequestProperty("Content-Type",
"application-json");
connection.setRequestProperty("X-Shopify-Access-Token",token);
connection.setUseCaches(false);
connection.setDoInput(true);
connection.setDoOutput(true);
// Send request
DataOutputStream w = new DataOutputStream(
connection.getOutputStream());
w.flush();
w.close();
// Get Response
InputStream i = connection.getInputStream();
BufferedReader streamReader = new BufferedReader(new InputStreamReader(i, "UTF-8"));
StringBuilder responseStrBuilder = new StringBuilder();
String inputStr;
while ((inputStr = streamReader.readLine()) != null){
System.out.println(inputStr);
responseStrBuilder.append(inputStr);
}

The Request Headers should be this:
connection.setRequestProperty("Accept", "application/json");
connection.setRequestProperty("Content-Type", "application/json");

Posting to a user's wall using the POST request and graph API

I am new to facebook app development and i have been trying to post a simple message on the wall of the user.i have managed to get the access token .Here is the code for the POST request.I am using java servlets
String data = URLEncoder.encode("access_token", "UTF-8") + "=" + URLEncoder.encode(accessToken, "UTF-8");
data += "&" + URLEncoder.encode("message", "UTF-8") + "=" + URLEncoder.encode("finally", "UTF-8");
out.println("data is\n"+data);
// Send data
String u="https://graph.facebook.com/me/feed";
URL urls = new URL(u);
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(data);
wr.flush();
Well this code is not working and i can not post on the wall.Any suggestion as to where i might be wrong?

I'm pretty sure that it's because you don't specify the application/x-www-form-urlencoded content type, try this:
URLConnection connection = new URL("https://graph.facebook.com/me/feed").openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
DataOutputStream out = new DataOutputStream(connection.getOutputStream());
out.writeBytes(data);
out.flush();
out.close()
Edit
Ok, so there are two more things that might cause this problem:
You also need to specify the content length.
You might need to read the response to make it count..
This code was tested and it works:
StringBuffer buffer = new StringBuffer();
buffer.append("access_token").append('=').append(ACCESS_TOKEN);
buffer.append('&').append("message=").append('=').append("YO!");
String content = buffer.toString();
URLConnection connection = new URL("https://graph.facebook.com/me/feed").openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", Integer.toString(content.length()));
DataOutputStream out = new DataOutputStream(connection.getOutputStream());
out.writeBytes(content);
out.flush();
out.close();
BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
System.out.println(inputLine);
}
in.close();

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