Database Reference
In-Depth Information
Listing 2.5
Using the Twitter API to fetch the friends of a user
public JSONArray GetFriends(String username) {
...
JSONArray friends = new JSONArray();
// Step 1: Create the API request using the supplied
username
URL url = new URL(
"https://api.twitter.com/1.1/friends/
list.json?screen_name="
+username+
"&cursor="
+cursor);
HttpURLConnection huc = (HttpURLConnection) url.
openConnection();
huc.setReadTimeout(5000);
// Step 2: Sign the request using the OAuth Secret
Consumer.sign(huc);
huc.connect();
...
/
**
Step 3: If the requests have been exhausted,
*
then wait until the quota is renewed
*
/
if(huc.getResponseCode()==429) {
try {
Thread.sleep(
this
.GetWaitTime(
"/friends/
list"
));
} catch (InterruptedException ex) {
Logger.getLogger(RESTApiExample.
class
.
getName()).log(Level.SEVERE, null,
ex);
}
}
// Step 4: Retrieve the friends list from Twitter
bRead = new BufferedReader(new InputStreamReader((
InputStream) huc.getContent()));
...
JSONObject jobj = new JSONObject(content.toString());
// Step 5: Retrieve the token for the next request
cursor = jobj.getLong(
"next_cursor"
);
JSONArray userlist = jobj.getJSONArray(
"users"
);
for(int i=0;i<userlist.length();i++) {
friends.put(userlist.get(i));
}
...
return friends;
}
Source: Chapter2/restapi/RESTApiExample.java
Rate Limit
: A maximum of 15 calls from a user and 30 API calls from an
application are allowed within a rate limit window.
