Develop Reference

How to call a Youtube Data API through HTTPUrlConnection in Android with using headers?

I am trying to develop a part of my app in which i want to get video details for a keyword. I am using the search list API. I think I have an issue with the authorization. I am getting a 401. I have tried passing my authorization details.
I have tried the following code after going through a few resources online and I am current getting the java.io.FileNotFoundException at the line at which i get the Input Stream. The connection code that I am getting is a 401.
The given code is in the doInBackground of an AsyncTask.
String ytres="";
URL url;
HttpURLConnection urlConnection = null;
try {
Log.d("youtubedata","a1");
url = new URL("https://www.googleapis.com/youtube/v3/search?part=id&q=queen%20bohemian");
Log.d("youtubedata","a2");
Log.d("youtubedata","a");
urlConnection = (HttpURLConnection) url
.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setRequestProperty ("Authorization", "Bearer MYAPIKEY");
urlConnection.setRequestProperty ("Accept", "application/json");
Log.d("youtubedatanum",Integer.toString(urlConnection.getResponseCode()));
InputStream in = urlConnection.getInputStream();
InputStreamReader isw = new InputStreamReader(in);
int data = isw.read();
while (data != -1) {
char current = (char) data;
data = isw.read();
ytres=ytres+current;
System.out.print(current);
}
Log.d("youtubedata",ytres);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
}
return ytres;
I do suspect the issue is in the way i have passed my API Key.

Please go through the API docs at Calling the API and at Search Endpoint.
You'll see that your URL does not contain the needed API key passed on as the key parameter.
It may also worth it to dug up Google's own sample Java implementation at Search.java. However, that code, due to the layer of library abstraction it uses, is not of immediate help since it obscures the way a client should work directly with the API.

For You-tube Data API error 401
Possible issue for unauthorized (401) can be
authorizationRequired
youtubeSignupRequired
Check You-tube Data API error doc Here.
Also confirm that you have follow THIS steps to integrate API.
Sample API Code you can find Here
Hope this can help you.

How to Use Both HTTPS and HTTP to parse JSON data in Android?

I followed this to Parse Json In Android
I have Successfully Done it with HttpData handler..
Here I am Successfully Posting Data to server and Getting Response..
Now I want to Use this same in the Part of HTTPS..
Can Any one suggest me How to do this Without Major Changes in my code.. Because In my application I am doing this for more activities.. Please Suggest me to Use HTTPs in my code..
I will provide Additional Info... Depending Responses...
Update
In my code I have Changed HttpURLConnection to HttpsURLConnection
Please suggest me How to through this error In my code..
Update 1
I have Changed Certificate on server side.. Now its working On Https..
But Now,
I want to Use HTTP and HTTPS Both in one app Depending on Client Requirement So here now its worked with Https....
But I also need to work with Http
In my Code Can any any one suggest me...I want I should Work with Https and Http Both In one App.

to use both HTTP and HTTPS, you need to have the 2 methods (i think you already have them)
GetHTTPData(String urlString)
GetHTTPSData(String urlString)
now in HTTPDataHandler class (where you have both methods above)
you need to create a 3rd method GetDataFromUrl(), that will check URL and decide which method to use (http or https)
public String GetDataFromUrl(String url){
if(url.toLowerCase().startsWith("https")){
//HTTPS:
return GetHTTPSData(url);
}else{
//HTTP:
return GetHTTPData(url);
}
}
now in the AsyncTask class ProcessJSON
replace this line stream = hh.GetHTTPData(urlString);
with this one stream = hh.GetDataFromUrl(urlString);
if you don't want to add that 3rd method in HTTPDataHandler, just use the if-statement in ProcessJSON at doInBackground() to call either one of the 2 methods (http or https)

You can use HttpsURLConnection, replace HttpURLConnection by HttpsURLConnection .
public String GetHTTPData(String urlString){
try{
URL url = new URL(urlString);
HttpsURLConnection urlConnection =(HttpsURLConnection)url.openConnection();
// Check the connection status
if(urlConnection.getResponseCode() == 200)
{
// if response code = 200 ok
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
// Read the BufferedInputStream
BufferedReader r = new BufferedReader(new InputStreamReader(in));
StringBuilder sb = new StringBuilder();
String line;
while ((line = r.readLine()) != null) {
sb.append(line);
}
stream = sb.toString();
// End reading...............
// Disconnect the HttpURLConnection
urlConnection.disconnect();
}
else
{
// Do something
}
}catch (MalformedURLException e){
e.printStackTrace();
}catch(IOException e){
e.printStackTrace();
}finally {
}
// Return the data from specified url
return stream;
}

What I understand is in your server side, they used self signed SSL certificate. So you have to install that certificate in your android device also. Settings > Security > install form storage.But for production build you have to buy ssl certificate from CA Authorities.
Hope this will solve your problem.

Remove HttpDataHandler lines in doInBackground use HttpUrlConnection directly in doInBackground or use HttpUrlConnection in JSONparse class to post params to server follow this tutorial to post params Website

When is it necessary to specific application/json Content-Type explicitly

Currently, I'm building a Android mobile app & Python restful server services.
I found that, it makes no different, whether or not I'm using
self.response.headers['Content-Type'] = "application/json"
The following code (which doesn't specific Content-Type explicitly) works fine for me. I was wondering, in what situation, I should specific Content-Type explicitly?
Python restful server services code
class DebugHandler(webapp2.RequestHandler):
def get(self):
response = {}
response["key"] = "value"
self.response.out.write(json.dumps(response))
application = webapp2.WSGIApplication([
('/debug', DebugHandler),
], debug = True)
Android mobile app client code
public static String getResponseBodyAsString(String request) {
BufferedReader bufferedReader = null;
try {
URL url = new URL(request);
HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
initHttpURLConnection(httpURLConnection);
InputStream inputStream = httpURLConnection.getInputStream();
bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
int charRead = 0;
char[] buffer = new char[8*1024];
// Use StringBuilder instead of StringBuffer. We do not concern
// on thread safety. stringBuffer = new StringBuffer();
StringBuilder stringBuilder = new StringBuilder();
while ((charRead = bufferedReader.read(buffer)) > 0) {
stringBuilder.append(buffer, 0, charRead);
}
return stringBuilder.toString();
} catch (MalformedURLException e) {
Log.e(TAG, "", e);
} catch (IOException e) {
Log.e(TAG, "", e);
} finally {
close(bufferedReader);
}
return null;
}

Content-Type specifies what's inside the response (i.e. how to interpret the body of the response). Is it JSON, a HTML document, a JPEG, etc? It is useful when you have different representations of your resources and together with Accept it's a header involved in doing content negotiation between client and server.
Different clients might need different formats. A C# client might prefer XML, a Javascript client might prefer JSON, another client could work with multiple representations but try to request the most efficient one first and then settle for others if the server can't serve the preferred one, etc.
Content-Type is very important in the browser so that the user agent knows how to display the response. If you don't specify one the browser will try to guess, usually based on the extension and maybe fallback to some Save as... dialog if that fails also. In a browser, the lack of a Content-Type might cause some HTML to open a Save as... dialog, or a PDF file to be rendered as gibberish in the page.
In an application client, not having a Content-Type might cause a parsing error or might be ignored. If you server only serves JSON and your client only expects JSON then you can ignore the Content-Type, the client will just assume it's JSON because that's how it was built.
But what if at some point you want to add XML as a representation, or YAML or whatever? Then you have a problem because the client assumed it's always JSON and ignored the Content-Type. Now when it receives XML it will try to parse as JSON and fail. If instead the client was built with content types in mind and you always specify a Content-Type then your client will then take it into account and select an appropriate parser instead of blindly making assumptions.

want to build lotus notes leave application for android

I want to build lotus notes leave application on android. For that purpose I need some lotus script files which will provide me data for showing in my app. But first thing what I need is to get server login
But after trying to login I am not getting proper response. I need advice how can I proceed to build the app leave application for ibm lotus notes.
protected static void tryLogin()
{ ``
HttpURLConnection connection;
OutputStreamWriter request = null;
URL url = null;
String response = null;
String parameters = "username="+"ABCD"+"password="+"!!!!!!!!";
try
{
url = new URL("http://10.194.5.33/dvlp/wdcidmanage.nsf/hwlsp?wsdl");
connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
// connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestMethod("POST");
request = new OutputStreamWriter(connection.getOutputStream());
request.write(parameters);
request.flush();
request.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();
System.out.println("response--------------------------"+response);
// You can perform UI operations here
// Toast.makeText(this,"Message from Server: \n"+ response, 0).show();
isr.close();
reader.close();
}
catch(IOException e)
{
// Error
System.out.println("error"+"----------------error is there------------");
}
}
this is my code snippet for login. in the server side what i need to do for login ?

If I understood, your need to consume a Domino WS: http://xx.xxx.x.xx/dvlp/wdcidmanage.nsf/hwlsp?wsdl
Ask the Domino administrator to add Anonymous in the ACL of the wdcidmanage.nsf
Consume the WS in androide: http://www.c-sharpcorner.com/UploadFile/88b6e5/how-to-call-web-service-in-android-using-soap/

For an overview of Domino web server authentication see this article. I wrote the article with Domino REST services in mind, but a lot of it applies to SOAP-based services too. This is because authentication is normally done in a layer that's common to REST and SOAP.
You probably want to start with basic authentication. That means sending an Authorization header with each web service request. The value of the Authorization header is just the base64 encoded user name and password as described in this Wikipedia article.
In your comment you said, "when i am trying to establish connection with it it returns me a html page." That sounds like the server is set up for session authentication. As the first article says, you can set up a web site rule to override session authentication for your web service. Then you will get back an HTTP 401 response when the request isn't properly authenticated.

Creating a playlist with Youtube DATA API on Android

I am trying to use the Youtube GDATA API in order to add a new playlist to a youtube account.
I base my code on the documentation: https://developers.google.com/youtube/2.0/developers_guide_protocol_playlists#Adding_a_playlist
I first get an access token and use my developer key appropriately.
The post seems to work just fine, but when trying to get back the response, I get a file not found exception while calling getInputStream.
Does anyone has an idea?
Thanks
Here is the connection code (an updated cleaner version):
#Override
protected Boolean doInBackground(Void... arg0) {
BufferedReader input = null;
InputStreamReader inputStreamReader = null;
StringBuilder postContentXml = new StringBuilder();
postContentXml.append("<?xml version='1.0' encoding='UTF-8'?>").
append("<entry xmlns='http://www.w3.org/2005/Atom'") .
append(" xmlns:yt='http://gdata.youtube.com/schemas/2007'>").
append("<title type='text'>Sports Highlights Playlist</title>").
append("<summary>A selection of sports highlights</summary>").
append("</entry>");
byte[] buffer = postContentXml.toString().getBytes();
StringBuilder response = new StringBuilder();
try {
URL url = new URL("https://gdata.youtube.com/feeds/api/users/default/playlists");
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
// Initialize connection parameters
urlConnection.setConnectTimeout(30000);
urlConnection.setReadTimeout(30000);
urlConnection.setDoOutput(true);
urlConnection.setRequestMethod("POST");
// Headers initialization
urlConnection.setRequestProperty("Content-Type", "application/atom+xml");
urlConnection.setRequestProperty("Content-Length", String.valueOf(buffer.length));
urlConnection.setRequestProperty("Authorization", mAuthToken);
urlConnection.setRequestProperty("GData-Version", "2");
urlConnection.setRequestProperty("X-GData-Key", YoutubeUtils.getDevKey());
OutputStream os = urlConnection.getOutputStream();
os.write(buffer, 0, buffer.length);
os.flush();
os.close();
InputStream inputStream = urlConnection.getInputStream();
inputStreamReader = new InputStreamReader(inputStream, "UTF-8");
input = new BufferedReader(inputStreamReader, 4096);
String strLine = null;
while ((strLine = input.readLine()) != null) {
response.append(strLine);
}
input.close();
inputStreamReader.close();
inputStream.close();
urlConnection.disconnect();
Log.d("CreatePlaylistTask", "Response: " + response);
}
catch(Exception e) {
Log.d("CreatePlaylistTask", "Error occured: " + e.getMessage());
}
return true;
}

I'm assuming that the POST wasn't actually successful.
If I had to guess from looking at your code, I'd think that the problem might be the Authorization header value. What does myAuthToken look like, and what type of token is it? If it's an OAuth 2 token, for instance, then the value needs to be Bearer TOKEN_VALUE, not just TOKEN_VALUE.
Also, please note that v3 of the YouTube Data API will be released in the near future, and it will offer better support on Android using the new Google APIs Client Library for Java.

I have put together a sample Android application which uses the YouTube Data v3 API to demonstrate how you can load a playlist into a ListView.
https://github.com/akoscz/YouTubePlaylist
Note that you MUST have a valid API key for this sample application to work. You can register your application with the Google Developer Console and enable the YouTube Data API. You need to Register a Web Application NOT an Android application, because the API key that this sample app uses is the "Browser Key".