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JAVA - How to build a client for OAuth 1.0 REST API with signature method as HMAC-SHA256?

I'm able to consume APIs (OAuth 1.0 Authorization & signature method as HMAC-SHA256) in POSTMAN, but not working JAVA (maven project).
Generated code from POSTMAN with OkHttp & Unirest libraries, both are not working. They give the following error.
403 Forbidden
I understand error is related to invalid authentication parameters. But not able to figure out what needs to be changed. Because same keys are working in Postman
OkHttp JAVA Code
OkHttpClient client = new OkHttpClient().newBuilder().build();
MediaType mediaType = MediaType.parse("application/json");
String url = "https://www.example.com?script=508&deploy=1";
String JSONpayload = "{}";
RequestBody body = RequestBody.create(mediaType, JSONpayload);
Request request = new Request.Builder()
.url(url)
.method("POST", body)
.addHeader("Content-Type", "application/json")
.addHeader("Authorization", "OAuth realm=\"1111222_SB1\",oauth_consumer_key=\"xxxxxxxxx\",oauth_token=\"xxxxxxxx\",oauth_signature_method=\"HMAC-SHA256\",oauth_timestamp=\"1628747273\",oauth_nonce=\"xxxxxx\",oauth_version=\"1.0\",oauth_signature=\"xxxxxxxxxxx\"")
.addHeader("Cookie", "NS_ROUTING_VERSION=LAGGING")
.build();
Response response = client.newCall(request).execute();
Unirest JAVA Code
Unirest.setTimeouts(0, 0);
String url = "https://www.example.com?script=508&deploy=1";
String JSONpayload = "{}";
HttpResponse<String> response = Unirest.post(url)
.header("Content-Type", "application/json")
.header("Authorization", "OAuth realm=\"1114415_SB1\",oauth_consumer_key=\"xxxxxxxxxx\",oauth_token=\"xxxxxxxxxxx\",oauth_signature_method=\"HMAC-SHA256\",oauth_timestamp=\"1628747273\",oauth_nonce=\"xxxxxxxx\",oauth_version=\"1.0\",oauth_signature=\"xxxxxxxx\"")
.header("Cookie", "NS_ROUTING_VERSION=LAGGING")
.body(JSONpayload).asString();
Any kind of help is appreciated. Thanks in Advance.

MS Graph create teams meeting Bad Request "onlinemeeting cannot be null."

I'm trying to create a meeting through a web app using a HttpPost request, but I'm getting a 400 BadRequest error with the message "onlinemeeting cannot be null."
HttpPost httpPost = new HttpPost("https://graph.microsoft.com/v1.0/me/onlineMeetings");
LocalDateTime meetingTime = java.time.LocalDateTime.now();
try {
JSONObject bodyJson = new JSONObject();
bodyJson.put("meetingType", "meetNow"); //tried with and without this and still didn't work
bodyJson.put("startDateTime", meetingTime.toString());
bodyJson.put("subject", "TeamsMeeting");
bodyJson.put("participants", new JSONObject().put("organizer",
new JSONObject().put("identity",
new JSONObject().put("user",
new JSONObject().put("id", userId)))));
StringEntity entity = new StringEntity(bodyJson.toString());
entity.setContentType("application/json");
httpPost.setEntity(entity);
BasicHeader authHeader = new BasicHeader("Authorization", "Bearer " + teamsToken);
httpPost.addHeader(authHeader);
httpPost.addHeader("Content-Type", "application/json");
HttpResponse postResponse = httpClient.execute(httpPost);
String responseContent = EntityUtils.toString(postResponse.getEntity(), StandardCharsets.UTF_8.name());
...
I get this when executing the post request:
{
"error": {
"code":"BadRequest",
"message":"onlinemeeting cannot be null.",
"innerError": {
"date":"2020-07-10T19:09:48",
"request-id":"cfad7871-6595-4efb-a262-13ac42f0e599"
}
}
}
It works when I use postman, but I can't when hitting it through my webapp. Any ideas what might be causing this? Is there something wrong in the Java code? Any help is appreciated.

If you create an online meeting with user token, there is the doc of OnlineMeeting with Java in MS Graph.
IGraphServiceClient graphClient = GraphServiceClient.builder().authenticationProvider( authProvider ).buildClient();
OnlineMeeting onlineMeeting = new OnlineMeeting();
onlineMeeting.startDateTime = "2019-07-12T21:30:34.2444915+00:00";
onlineMeeting.endDateTime = "2019-07-12T22:00:34.2464912+00:00";
onlineMeeting.subject = "User Token Meeting";
graphClient.me().onlineMeetings()
.buildRequest()
.post(onlineMeeting);
If you create an online meeting with application token, try this code:
IGraphServiceClient graphClient = GraphServiceClient.builder().authenticationProvider( authProvider ).buildClient();
OnlineMeeting onlineMeeting = new OnlineMeeting();
onlineMeeting.startDateTime = "2019-07-12T21:30:34.2444915+00:00";
onlineMeeting.endDateTime = "2019-07-12T22:00:34.2464912+00:00";
onlineMeeting.subject = "Application Token Meeting";
MeetingParticipants meetingParticipants = new MeetingParticipants();
meetingParticipants.organizer.identity.user.id = "550fae72-d251-43ec-868c-373732c2704f";
onlineMeeting.participants = meetingParticipants;
graphClient.me().onlineMeetings()
.buildRequest()
.post(onlineMeeting);
For more details about the Class OnlineMeeting, see here.

Use Below Code its worked for me:
OkHttpClient client = new OkHttpClient();
MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, json);
Request request = new Request.Builder()
.url(authHelper.getMsGraphEndpointHost() + url)
.post(body)
.addHeader("content-type", "application/json")
.addHeader("authorization", accessToken)
.addHeader("cache-control", "no-cache")
.build();
Response responseOk = client.newCall(request).execute();

The issue ended up being with the startDateTime because I think it wasn't in the exact format required. The error message didn't indicate that it was that value, but once removing that from the json body, it worked without having to use the OnlineMeeting object.

Make a post request with okHttp

I make a post request using okHttp with the next code:
final MediaType JSON = MediaType.get("application/json; charset=utf-8");
OkHttpClient client = new OkHttpClient();
RequestBody body = RequestBody.create(JSON, params);
Request request = new Request.Builder()
.url(url)
.post(body)
.build();
Response response = null;
response = client.newCall(request).execute();
The server response with:
response
{
message: {
user: {
id: 12,
name: 'myName'
},
message: 'Usuario creado con éxito.',
code: 200
}
}
But the response that okHttp gives me is:
Response{protocol=http/1.1, code=200, message=OK, url=http://localhost:2222/api/users}
There isn´t a way to get what the server sends me with okHttp?

If the response is sent in the body you can get it with:
response.body().string();
You just had to look on the documentation
¡Salud!

What you are getting is the header of response object. you can access the body of response by:
response.body().string();
full code:
final MediaType JSON = MediaType.get("application/json; charset=utf-8");
OkHttpClient client = new OkHttpClient();
RequestBody body = RequestBody.create(JSON, params);
Request request = new Request.Builder()
.url(url)
.post(body)
.build();
Response response = null;
response = client.newCall(request).execute();
String responseBody = response.body().string();

When sending okhttp request: HTTP ERROR 405 and invalid_client

I'm making a request to a website. However, I keep getting a returned JSON of {"error":"invalid_client"}. Additionally, when I navigate to the URL I'm making the request to through a web browser it shows HTTP ERROR 405.
From what I read on those errors that might mean that my request isn't structured correctly.
According to the API's documentation, this is an example of the request type I'm trying to do:
OkHttpClient client = new OkHttpClient();
MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
RequestBody body = RequestBody.create(mediaType, "client_secret={your_client_secret}&client_id={your_client_id}&code={your_authorization_code}&grant_type=authorization_code&redirect_uri={your_redirect_uri}");
Request request = new Request.Builder()
.url("https://api.website.com/v2/oauth2/token")
.post(body)
.addHeader("content-type", "application/x-www-form-urlencoded")
.addHeader("cache-control", "no-cache")
.build();
Response response = client.newCall(request).execute();
From what I can tell mine should be doing the same thing, just a little differently.
Here is a Pastebin of my doInBackground method (I'm using AsynchTask). Here is the more applicable part:
OkHttpClient client = new OkHttpClient();
// A section here gets strings from a JSON file storing values such as client_id
RequestBody bodyBuilder = new FormBody.Builder()
.add("client_secret", CLIENT_SECRET)
.add("client_id", CLIENT_ID)
.add("code", AUTHORIZATION_CODE)
.add("grant_type", GRANT_TYPE)
.add("redirect_uri", REDIRECT_URI)
.build();
System.out.println("Built body: " + bodyBuilder.toString());
String mediaTypeString = "application/x-www-form-urlencoded";
MediaType mediaType = MediaType.parse(mediaTypeString);
RequestBody body = RequestBody.create(mediaType, requestbodyToString(bodyBuilder)); // See Edit 1
Request request = new Request.Builder()
.url(TARGET_URL)
.post(body)
.addHeader("content-type", mediaTypeString)
.addHeader("cache-control", "no-cache")
.build();
try {
System.out.println("Starting request.");
Response response = client.newCall(request).execute();
String targetUrl = request.url().toString() + bodyToString(request);
System.out.println("request: " + targetUrl);
String responseBodyString = response.body().string();
System.out.println("response: " + responseBodyString);
return responseBodyString;
} catch (IOException ex) {
System.out.println(ex);
}
Like I said, I keep getting a returned JSON of {"error":"invalid_client"}, and when I navigate to the URL I'm making the request to through a web browser it shows HTTP ERROR 405.
I'd love to provide as much additional information as you need. Thanks!
Edit 1: The second parameter of this used to be "bodyBuilder.toString()", but I changed it because I realized it wasn't actually sending the body. The result is still the same - {"error":"invalid_client"}. The method now used comes from here.

I figured out what it was - I hadn't actually been writing the authentication_code to the file, only adding it to another JSONObject. Oops. :)

How to send url encoded data using post method in java

I am trying to send url encoded data using HttpURLConnection method in java. Client shared the below string from Soap UI tester as a sample request:
http://www.clienturl.com/payment?username=bk&password=bk&customerid=100039085&amountcredit=100&operationdate=2018-07-17&event=9977773&reference=2323900&account=00000000&valuedate=2018-07-17&terminal=00010
I've tried all combinations of sending data using java. Am getting response code as 200, but the response is showing that missing mandatory parameters in the request. Please help if there are any error in my code, in writing the request.
StringBuffer response = new StringBuffer();
String EndPointURL = url;
String requestXML = "username=bk&password=bk&customerid=78233209438&amountcredit=100&operationdate=2018-07-17&event=9977773&reference=13903232&account=000000&valuedate=2018-07-17&terminal=00010";
String encodedData = URLEncoder.encode(requestXML, "UTF-8");
System.out.println("Encoded data: " + encodedData);
URL localURL = new URL(EndPointURL);
HttpURLConnection con = (HttpURLConnection) localURL.openConnection();
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
con.setRequestProperty("Accept-Charset", charset);
con.setRequestProperty("Content-Length", Integer.toString(encodedData.length()));
OutputStream os = con.getOutputStream();

if you are using Okhttp3, use this code :
OkHttpClient client = new OkHttpClient();
MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
RequestBody body = RequestBody.create(mediaType, "string-that-you-need-to-pass-in-body");
Request request = new Request.Builder()
.url("url-string")
.post(body)
.addHeader("content-type", "application/x-www-form-urlencoded")
.build();
Response response = client.newCall(request).execute();
For Unirest :
HttpResponse<String> response = Unirest.post("url-string")
.header("content-type", "application/x-www-form-urlencoded")
.body("string-that-you-need-to-pass-in-body")
.asString();