I try to get authorization token from Twitter (app-only), the code almost fully follows oficial guide, but get 503 Service unavailable code.
@Override
protected Boolean doInBackground(Void... params) {
String cred_enc = tw_cons_key + ":" + tw_priv_cons_key;
cred_enc = Base64.encodeToString(cred_enc.getBytes(), Base64.NO_WRAP);
Request request = new Request.Builder().url("https://api.twitter.com/oauth2/token")
.header("Authorization:", "Basic " + cred_enc)
.header("Content-Type:", "application/x-www-form-urlencoded;charset=UTF-8")
.post(RequestBody.create(MEDIA_TYPE_MARKDOWN, postBody))
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
ResponseBody body = response.body();
if (response.isSuccessful()) {
Headers headers = response.headers();
//response check
for (int i = 0; i < headers.size(); i++) {
System.out.println("Headers: " + i + " " + headers.name(i) + " : " + headers.value(i));
}
System.out.println(body.string());
try {
JSONObject jsonObject = new JSONObject(body.string());
} catch (JSONException e) {
e.printStackTrace();
}
} else {
throw new IOException("Unexpected code" + response);
}
body.close();
}
});
return true;
}
What may be the possible reason?
It required me to write a simple server on localhost to find out what HTTP request was actually generated.
The problem was with colons: .header("Authorization:"resulted in Authorization:: in the network request!
After I removed colons from the header key values, both HttpUrlConnection and OkHttp code variants worked seamlessly.