We Keep Coding

How tu use PerspectiveAPI in Java?

how to use the perspective api, in java, I have tried several codes and it does not work too much .
I have do this, but not work.
`
try {
String url = "https://commentanalyzer.googleapis.com/$discovery/rest?version=v1alpha1&", key = "key=my_key";
final URL serverUrl = new URL(url + key);
URLConnection urlConnection = serverUrl.openConnection();
HttpURLConnection httpConnection = (HttpURLConnection)urlConnection;
httpConnection.setRequestMethod("POST");
httpConnection.setRequestProperty("Content-Type", "application/json");
httpConnection.setDoOutput(true);
BufferedWriter httpRequestBodyWriter = new BufferedWriter(new
OutputStreamWriter(httpConnection.getOutputStream()));
httpRequestBodyWriter.write("{\"comment\": {\"text\": \"" + "Salut mec" + "\"},"
+ "\"requestedAttributes\": {\"TOXICITY\": {}}}");
httpRequestBodyWriter.flush();
httpRequestBodyWriter.close();
System.out.println("CODE : " + httpConnection.getResponseCode());
BufferedReader responseBuffer = new BufferedReader(new InputStreamReader((httpConnection.getInputStream())));
String output;
while ((output = responseBuffer.readLine()) != null) {
System.out.println(output);
}
httpConnection.disconnect();
} catch (IOException e1) {
e1.printStackTrace();
}`
I have Code 404, and Caused by: java.io.FileNotFoundException: https://commentanalyzer.googleapis.com/$discovery/rest?version=v1alpha1&key=my_key
Have you an idea ?

How to implement HTTP POST method in web proxy through Java

I am trying to make a web proxy for HTTP communication between server and client. The GET method is working fine but I am POST method part is not working. I am sure I have missed out something. I want to know what have I missed or not implemented.
// request from client is handle from here
while ((inputLine = in.readLine()) != null) {
try {
StringTokenizer tok = new StringTokenizer(inputLine);
tok.nextToken();
} catch (Exception e) {
break;
}
if (cnt == 0) {
System.out.println("inputLine "+inputLine);
String[] tokens = inputLine.split(" ");
urlToCall = tokens[1];
//hum inputline sy URL nikaal rahay hai
if(tokens[0]=="POST")
{
f=1;
}
System.out.println("Request for : " + urlToCall);
}
cnt++;
}
BufferedReader rd = null;
try {
//yaha sy hum ab server ko request send karay gy
URL url = new URL(urlToCall);
URLConnection conn = url.openConnection();
HttpURLConnection huc = (HttpURLConnection) conn;
conn.setDoInput(true);
conn.setDoOutput(false);
// now we will get the response from the server
if (f == 1) {
huc.setDoOutput(true);
huc.setInstanceFollowRedirects(false);
huc.setRequestMethod("POST");
huc.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
huc.setRequestProperty("charset", "utf-8");
}
InputStream is = null;
if (conn.getContentLength() > 0)
{
try {
is = conn.getInputStream();
rd = new BufferedReader(new InputStreamReader(is));
} catch (IOException ioe) {
System.out.println(
"********* IO EXCEPTION **********: " + ioe);
}
}

What is the error you are getting on the post? And what is a sample GET request that is being passed into your code?
When I use a simple GET request, the code fails because the urlToCall does not have the host or protocol. The below code worked for me, but I would highly suggest you change your code to not hide the exceptions that are being thrown because they will have important information about what is going wrong with your code.
if (cnt == 1) {
System.out.println("host: " + inputLine);
String[] tokens = inputLine.split(" ");
urlToCall = "HTTP://" + tokens[1] + urlToCall;
}

Google Drive Api OAuth2 no token but lots of errors

I am trying to access the Drive Api from a JavaFX Desktop app. After I received the initial authentication (aka code), I want to get the token to be able to work with the api. The config is set up as a native application in the dev console.
When I attempt to fetch the token I get various http-errors (400, 401, 404, 405, 406, 411). I guess something is wrong with the encoding and/or the way I send the request to the server.
Here the code:
public void sendOAuth2TokenRequest(String initialOAuth2) {
final String charset = "UTF-8";
try {
String url = "https://www.googleapis.com/oauth2/v3/token";
HttpsURLConnection con = (HttpsURLConnection) new URL(url).openConnection();
con.setDoOutput(true);
con.setRequestMethod("POST");
con.setRequestProperty("Accept-Charset", charset);
con.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
OutputStream output = con.getOutputStream();
output.write(getEncodedUrlParms().getBytes(charset));
output.close();
BufferedReader responseReader =
new BufferedReader(new InputStreamReader(con.getInputStream(), charset));
String inputLine;
StringBuilder response = new StringBuilder();
while ((inputLine = responseReader.readLine()) != null) {
response.append(inputLine);
}
Log.i(TAG, "OAuth2Request " + inputLine);
responseReader.close();
} catch (IOException e) {
e.printStackTrace();
Log.e(TAG, "OAuth2Request Error: " + e.getMessage());
}
}
private String getEncodedUrlParms() throws UnsupportedEncodingException {
return "code=" + URLEncoder.encode(getInitialCode(), "UTF-8") +
"&client_id=" + URLEncoder.encode(DriveHelper.CLIENT_ID, "UTF-8") +
"&client_secret=" + URLEncoder.encode(DriveHelper.CLIENT_SECRET, "UTF-8") +
"&redirect_uri=" + URLEncoder.encode("urn:ietf:wg:oauth:2.0:oob", "UTF-8") +
"&grant_type=" + URLEncoder.encode("authorization_code", "UTF-8");
}
Please let me know what the mean here:
The client secret you obtained from the Developers Console (optional for clients registered as Android, iOS or Chrome applications).
Is the client_secret needed (mandatory) in native apps?

How to set parameters in a GET request in Java

So I want to send a GET request with parameters. But it only seems to have conventions for the url you send the request to. Unlike the POST request, I see no way to pass parameters in it.
How I send the GET request now, without parameters (might be wrong):
String url = "http://api.netatmo.net/api/getuser";
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
// optional default is GET
con.setRequestMethod("GET");
//add request header
con.setRequestProperty("User-Agent", USER_AGENT);
int responseCode = con.getResponseCode();
Log.v(TAG, ("\nSending 'GET' request to URL : " + url));
Log.v(TAG, ("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
Log.v(TAG, (response.toString()));
How I send the POST request with parameters:
String url = "https://api.netatmo.net/oauth2/token";
URL obj = new URL(url);
HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
//add request header
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", USER_AGENT);
con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
String urlParameters = "grant_type=password&client_id=myid&client_secret=mysecret&username=myusername&password=mypass";
// 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(TAG, "\nSending 'POST' request to URL : " + url);
Log.v(TAG, "Post parameters : " + urlParameters);
Log.v(TAG, "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
Log.v(TAG, response.toString());
access_token = response.substring(17, 74);
refresh_token = response.substring(93,150);
getRequest = "/api/getuser?access_token=" + access_token + " HTTP/1.1";
Log.v(TAG, access_token);
Log.v(TAG, refresh_token);
Log.v(TAG, getRequest);

As per the HTTP specification GET supports only path params or url params and hence you cannot put the params in HTTP request body as you do in POST request.
As Sotirios mentioned in the comments, technically you can still push params in the GET body, but if the APIs are respecting the specs, they will not provide you a way to do it.

Have you tried to add the query params to the request java.net.URL?
String url = "http://api.netatmo.net/api/getuser?access_token=" + access_token;
URL obj = new URL(url);

I was encountering the same problem, trying this:
String bla = "http://api.netatmo.net/api/devicelist?access_token=" + AUTH_TOKEN;
URL url = new URL(bla);
BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));
String line = "";
String message = "";
while ((line = reader.readLine()) != null)
{
message += line;
}
I got an exception that the syntax was not correct. When I changed the syntax (by for example encoding with UTF 8) the API would just return errors (like 404 not found...).
I finally got it working using this:
try
{
System.out.println("Access Token: " + AUTH_TOKEN);
String url = "http://api.netatmo.net/api/devicelist";
String query = "access_token=" + URLEncoder.encode(AUTH_TOKEN, CHARSET);
URLConnection connection = new URL(url + "?" + query).openConnection();
connection.setRequestProperty("Accept-Charset", CHARSET);
InputStream response = connection.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(response));
String line = "";
String message = "";
while ((line = reader.readLine()) != null)
{
message += line;
}
return message;
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Note: CHARSET = "UTF-8"

Turns out the url the API provided confused me greatly. I fixed the url and it works now.

Java - HttpURLConnection - How to insert user data into Header Response

I have a java servlet class that is performing a GET to a specific URL. I am also passing data as part of the GET.
What I need, is in my HTTP Server code that recieves this data, how do I insert user based response data into the Header back so my calling Java servlet class can read it.
I can read standard response things like .getResponseCode() etc, but I need to insert my own response into the header some how. How can this be done? and how can I read it?
This is my java servlet send class:
public void sendRequest(String data, String sendUrl) throws Throwable{
String messageEncoded = URLEncoder.encode(data, "UTF-8");
String message = URLDecoder.decode(messageEncoded);
System.out.println("messageEncoded : " + messageEncoded);
System.out.println("messageDecoded : " + message);
try {
URL url = new URL(sendUrl);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestMethod("GET");
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
writer.write(message);
writer.close();
BufferedReader rd = null;
StringBuilder sb = null;
String line = null;
System.out.println(" *** headers ***");
for (Entry<String, List<String>> headernew : connection.getHeaderFields().entrySet()) {
System.out.println(headernew.getKey() + "=" + headernew.getValue());
}
System.out.println(" \n\n*** Body ***");
rd = new BufferedReader(new InputStreamReader(connection.getInputStream()));
sb = new StringBuilder();
while ((line = rd.readLine()) != null) {
sb.append(line + '\n');
}
System.out.println("body=" + sb.toString());
System.out.println("connection.getResponseCode() : " + connection.getResponseCode());
System.out.println("connection.getResponseMessage()" + connection.getResponseMessage());
if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
// Ok
} else {
// Server returned HTTP error code.
}
} catch (MalformedURLException e) {
// ...
System.out.println(this.getClass() + " : MalformedURLException Error occured due to: " + e);
} catch (IOException e) {
System.out.println(this.getClass() + " : IOException Error occured due to: " + e);
}
}