friendships/exists

判断两个用户是否有关注关系，如果user_a关注了user_b则返回true,否则返回false.

Tests for the existence of friendship between two users. Will return true if user_a follows user_b, otherwise will return false.

URL:

http://api.t.sina.com.cn/friendships/exists.format

Formats:

xml, json

HTTP Method(s):

POST, DELETE

Requires Authentication (about authentication):

true if user_a or user_b is protected

API rate limited (about rate limiting):

true

Parameters:

• user_a. 必填参数，要判断的用户UID或用户账号
• user_b. 必填参数，要判断的被关注人用户UID或用户账号.

• user_a. Required. The ID or screen_name of the subject user.
• user_b. Required. The ID or screen_name of the user to test for following.

Response (about return values):

XML example:

<friends>true</friends>

JSON example:

true

Usage examples:

cURL (about cURL):

curl -u user:password http://api.t.sina.com.cn/friendships/exists.xml?user_a=dougw&user_b=al3x