我正在使用 twitter 的文档来关注用户，使用下面的 url https://dev.twitter.com/rest/reference/post/friendships/create
在使用 api https://api.twitter.com/1.1/friendships/create.json?user_id=1401881&follow=true时，我收到 403 错误，
调用api的代码如下。
public String getTwitterFollow(String url) {
//?screen_name=MDforLives&follow=true
String results = null;
// Step 1: Encode consumer key and secret
try {
// URL encode the consumer key and secret
String urlApiKey = URLEncoder.encode(CONSUMER_KEY, "UTF-8");
String urlApiSecret = URLEncoder.encode(CONSUMER_SECRET, "UTF-8");
// Concatenate the encoded consumer key, a colon character, and the
// encoded consumer secret
String combined = urlApiKey + ":" + urlApiSecret;
// Base64 encode the string
String base64Encoded = Base64.encodeToString(combined.getBytes(), Base64.NO_WRAP);
// Step 2: Obtain a bearer token
HttpPost httpPost = new HttpPost(TwitterTokenURL);
httpPost.setHeader("Authorization", "Basic " + base64Encoded);
httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
httpPost.setEntity(new StringEntity("grant_type=client_credentials"));
String rawAuthorization = getResponseBody(httpPost);
Authenticated auth = jsonToAuthenticated(rawAuthorization);
// Applications should verify that the value associated with the
// token_type key of the returned object is bearer
if (auth != null && auth.token_type.equals("bearer")) {
url = url.replaceAll(" ", "%20");
// Step 3: Authenticate API requests with bearer token
HttpPost httpGet = new HttpPost(url);
// construct a normal HTTPS request and include an Authorization
// header with the value of Bearer <>
httpGet.setHeader("Authorization", "Bearer " + auth.access_token);
// httpGet.setHeader("Content-Type", "application/json");
StringEntity stringEntity;
JSONObject obj=new JSONObject();
obj.put("screen_name","MDforLives");
obj.put("follow","true");
stringEntity = new StringEntity(obj.toString());
stringEntity.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
// httpGet.setEntity(stringEntity);
// update the results with the body of the response
results = getResponseBody(httpGet);
System.out.println("results returns" + results);
}
} catch (Exception ex) {
}
return results;
}
因此，请建议 url 有什么问题，或者 android 端是否有任何代码问题。