Develop Reference

JAVA rest assure get request with auth token

I am trying to create a post request with auth token but I am getting null response. Can you please help me.Can you please let me know what am I missing in the code ?
public static void main(String[] args) {
try {
String url = "https://test.abc.com/";
String token="XXXXXX-abcd-496a-ae73-7659587896";
URL object = new URL(url);
HttpURLConnection con = (HttpURLConnection) object.openConnection();
con.setDoInput(true);
con.setRequestMethod("GET");
con.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
con.setRequestProperty("Accept", "application/json");
con.setRequestProperty("Authorization", "Bearer " + token);
//Display what the GET request returns
StringBuilder sb = new StringBuilder();
int HttpResult = con.getResponseCode();
if (HttpResult == HttpURLConnection.HTTP_OK) {
BufferedReader br = new BufferedReader(
new InputStreamReader(con.getInputStream(), "utf-8"));
String line = null;
while ((line = br.readLine()) != null) {
sb.append(line + "\n");
}
br.close();
System.out.println(con.getResponseMessage());
} else {
System.out.println(con.getResponseMessage());
}
} catch (Exception e) {
System.out.println(e);
}
}
}

Can't send JSON in a Java HTTP POST request

I'm getting a 'Server returned HTTP response code: 500' error although I have checked what I'm sending (I even tried sending it with an online tool and it worked). The API Key and the JSON are correct. I get this error when trying to read the input stream with 'connection.getInputStream()'. Where could this be comming frome ? Did I forget something ? I am trying to implement this feature from the openrouteservice API : https://openrouteservice.org/dev/#/api-docs/v2/directions/{profile}/post
public static UPSRoute getRoute(Location start, Location end, String language) {
if (language.equals("fr")) {
JSONObject jsonObject = null;
try {
URL url = new URL("https://api.openrouteservice.org/v2/directions/foot-walking");
String payload = "{\"coordinates\":[[" + start.getCoordinates() + "],[" + end.getCoordinates() + "]],\"language\":\"fr\"}";
System.out.println(payload); //{"coordinates":[[1.463478,43.562038],[1.471717,43.560787]],"language":"fr"}
byte[] postData = payload.getBytes(StandardCharsets.UTF_8);
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Authorization", API_KEY);
connection.setRequestProperty("Accept", "application/json, application/geo+json, application/gpx+xml, img/png; charset=utf-8");
connection.setDoOutput(true);
try (DataOutputStream wr = new DataOutputStream(connection.getOutputStream())) {
wr.write(postData);
}
BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream())); // Error is right here
String inputLine;
StringBuffer content = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
content.append(inputLine);
}
in.close();
connection.disconnect();
jsonObject = new JSONObject(content.toString());
} catch (IOException | JSONException e) {
e.printStackTrace();
}
return new UPSRoute(jsonObject);
} else {
return getRoute(start, end);
}
}
Here is the error :
java.io.IOException: Server returned HTTP response code: 500 for URL: https://api.openrouteservice.org/v2/directions/foot-walking/json
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1913)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1509)
at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:245)
at UPSRouteService.getRoute(UPSRouteService.java:63)
at Main.main(Main.java:5)

Thanks to Andreas, it was just missing the line :
connection.setRequestProperty("Content-Type", "application/json");
It works fine now.

Request Transaction-List from Paypal

I try to request a transaction list from paypal but I allways get HTTP-Code 400
public void getTransactionList(String accessToken)
{
try
{
URL url = new URL(
"https://api.sandbox.paypal.com/v1/reporting/transactions"
+ "?start_date=2018-01-01T00:00:00Z&end_date=2018-04-01T00:00:00Z"
+ "&fields=all&page_size=100&page=1");
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setRequestProperty("Authorization", "Bearer " + accessToken);
conn.setRequestProperty("Content-Type", "application/json");
conn.setRequestProperty("Accept-Language", "en_US");
conn.setUseCaches(false);
conn.setDoOutput(true);
String line;
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
while ((line = reader.readLine()) != null)
{
System.out.println(line);
}
reader.close();
}
catch (Throwable e)
{
e.printStackTrace();
//throw new ActionException(e);
}
}
The Exception is
java.io.IOException: Server returned HTTP response code: 400 for URL: https://api.sandbox.paypal.com/v1/reporting/transactions?start_date=2018-01-01T00:00:00-000&end_date=2018-04-02T00:00:00-000&fields=all&page_size=100&page=1
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1894)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:263)
at de.crefo.workflow.paypal.http.HttpRestClient.getTransactionList(HttpRestClient.java:42)
at de.crefo.workflow.paypal.http.HttpRestClient.main(HttpRestClient.java:112)
The Access-Token request, I do in a similar way, is working perfectly fine and gives me a valid token.
What am I doing wrong?
EDIT. Changed dateformat in URL, see comments.

HttpsURLConnection - Send POST request

I want to send a POST request to this particular API: https://developer.lufthansa.com/docs/read/api_basics/Getting_Started and I researched how to do that and tried everything but it simply doesn't work, I always get an HTTP 400 or an HTTP 401 error. Here's my code:
private void setAccessToken(String clientID, String clientSecret) {
try {
URL url = new URL(URL_BASE + "oauth/token");
String params = "client_id=" + clientID + "&client_secret=" + clientSecret + "&grant_type=client_credentials";
HttpsURLConnection connection = (HttpsURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
connection.connect();
OutputStreamWriter osw = new OutputStreamWriter(connection.getOutputStream());
osw.write(params);
BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while((line = br.readLine()) != null) {
System.out.println(line);
}
} catch(IOException e) {
e.printStackTrace();
}
}
Kenta1561

Seems that your code is working well and it may be the case that you are providing invalid clientID or clientSecret so that your are getting wrong response in this case (as 401 indicates unauthorized). One thing you can do is you are only getting the response message if the http request status is ok (200). You may also get the invalid response message in case of 400 or 401 http response status. In order to print the invalid response messages you may follow the code below:
private void setAccessToken(String clientID, String clientSecret) throws Exception {
String params = "client_id=" + clientID + "&client_secret=" + clientSecret + "&grant_type=client_credentials";
URL obj = new URL(url);
HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
BufferedReader in;
// add reuqest header
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", "Mozilla/5.0");
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
// Send post request
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(params);
wr.flush();
wr.close();
int responseCode = con.getResponseCode();
if (responseCode >= 400)
in = new BufferedReader(new InputStreamReader(con.getErrorStream()));
else
in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
System.out.println(response.toString());
}
In this way you can also get invalid response message. In your case when I tried to hit the provided api it is giving me the response below:
{"error": "invalid_client"}

openTSDB REST API is not storing data

I am trying to write to an openTSDB database so I can analyse my data using Bosun.
If I manually add data through the Bosun interface it works fine, however if i do a POST request to <docker-ip>/api/put (where <docker-ip> is configured correctly) the data does not show up in Bosun.
If I send the data points as a a JSON from my Java application nothing shows up at all in Bosun, but if I send the request using the chrome app 'Postman' then the metric shows up, but the data I sent with the request does not.
This is the data I'm sending:
try {
CloseableHttpClient httpClient = HttpClientBuilder.create().build();
HttpPost request = new HttpPost("http://192.168.59.103:8070/api/put?summary");
StringEntity params = new StringEntity("{\"metric\":\"tester.example\",\"timestamp\":\"" + System.currentTimeMillis() + "\", \"value\": \"22\", \"tags\": { \"host\": \"chrisedwards\", \"dc\": \"lga\" }}");
request.setEntity(params);
request.setHeader("Content-Type", "application/json; charset=UTF-8");
HttpResponse response = httpClient.execute(request);
System.out.println(response);
// handle response here...
} catch (Exception ex) {
ex.printStackTrace();
} finally {
// httpClient.close();
}
which returns a 200 response code. I send the same request using Postmaster to the same address as in the java application however, the postmaster request shows the metric name in Bosun but no data, and the Java request doesn't even show the metric name.

Try this, it served my purpose:
try {
String url = "http://192.168.59.103:8070/api/put";
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
//add reuqest header
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", USER_AGENT);
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
String urlParameters = "{\"metric\":\"tester.example\",\"timestamp\":\"" + System.currentTimeMillis() + "\", \"value\": \"22\", \"tags\": { \"host\": \"chrisedwards\", \"dc\": \"lga\" }}";
// Send post request
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(urlParameters);
wr.flush();
wr.close();
int responseCode = con.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + url);
System.out.println("Post parameters : " + urlParameters);
System.out.println("Response Code : " + 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
System.out.println(response.toString());
}
catch(Exception e) {
e.printStackTrace();
}