今天遇到一个坑爹的项目需求，做个笔记方便下次再用。
需求描述：
1.打开对方官网https:test.cn
2.用账户登陆https:test.cn
3.登陆成功后跳转到我们的网站https:my.cn,并且返回一个code给我们
4.进入我们系统后根据返回的code在后台用代码post对方的一个action 地址:https://https:test.cn/CNS-AS/OAuth/Token/1.1 获取一个Access_token
5.将获取到的Access_token添加到http 头文件中再去调用对方的wcf接口https:test.cn/CNS-Service/CNSServices.svc/CNSServices
6.最后拿到验证通过的账户信息，最后停留https:my.cn 我们站点进行相关操作
废话少说，直接上代码
1.https:test.cn 登陆成功后跳转的地址：
https://test.cn/CNS-AS/OAuth/Authorize?client_id=indegene_client&redirect_uri=https:my.cn/home/index&state=12321&scope=http://tempuri.org/ICNSServices/GetCNSUserName&response_type=code
2.进入https:my.cn后代码
public ActionResult Index()
{
//1-3step(Authorization Response)
string code = Request["code"];
string state = Request["state"];
//4. Access Token Request
HttpWebRequest objWebRequest = (HttpWebRequest)WebRequest.Create("https://test.cn/CNS-AS/OAuth/Token/1.1"); //请求地址
//设置用户名密码的Base64编码
string code1 = Convert.ToBase64String(Encoding.ASCII.GetBytes(string.Format("{0}:{1}", "test", "test")));
string postData = string.Format("grant_type=authorization_code&code={0}&redirect_uri={1}&client_id={2}&client_secret={3}", code, "http://my/home/index", "indegene_client", "indegene_secretIJH"); // 要发放的数据
byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(postData);
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
objWebRequest.Method = "POST";//提交方式
objWebRequest.ContentType = "application/x-www-form-urlencoded";
objWebRequest.ContentLength = byteArray.Length;
Stream newStream = objWebRequest.GetRequestStream(); // Send the data.
newStream.Write(byteArray, 0, byteArray.Length); //写入参数
newStream.Close();
//响应请求
//5. Access Token Response
HttpWebResponse response = (HttpWebResponse)objWebRequest.GetResponse();//获取响应
StreamReader sr = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);
string textResponse = sr.ReadToEnd(); // 返回的数据
Response.Write(textResponse);//打印返回值
AccessToken access_token = JsonConvert.DeserializeObject<AccessToken>(textResponse);
//6. Request CNS user information by access token（调用wcf）
CNS.CNSServicesClient svc = new CNS.CNSServicesClient();
using (OperationContextScope scope =
new OperationContextScope(svc.InnerChannel))
{
//添加消息头
HttpRequestMessageProperty requestMessage = new HttpRequestMessageProperty();
requestMessage.Headers.Add("Authorization", "aaa" + access_token.Access_token);
OperationContext.Current.OutgoingMessageProperties[HttpRequestMessageProperty.Name] = requestMessage;
//调用wcf（必须先添加消息头，否则不能调用（身份验证））
string res = svc.GetCNSUserName();
}
}
public class AccessToken {
private string access_token;
public string Access_token
{
get { return access_token; }
set { access_token = value; }
}
private string token_type;
public string Token_type
{
get { return token_type; }
set { token_type = value; }
}
private string expires_in;
public string Expires_in
{
get { return expires_in; }
set { expires_in = value; }
}
private string refresh_token;
public string Refresh_token
{
get { return refresh_token; }
set { refresh_token = value; }
}
private string scope;
public string Scope
{
get { return scope; }
set { scope = value; }
}
}