使用AFNetWorking 实现以Basic Authentication方式获取access-token

async Task GetAccessToken(string grantType, string userName = null, string password = null) { var parameters = new Dictionary<string, string>(); parameters.Add("client_id", "1234"); parameters.Add("client_secret", "5678"); var clientId = "1234"; var clientSecret = "5678"; var parameters = new Dictionary<string, string>(); parameters.Add("grant_type", grantType); if (!string.IsNullOrEmpty(userName) && !string.IsNullOrEmpty(password)) { parameters.Add("username", userName); parameters.Add("password", password); } _httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue( "Basic", Convert.ToBase64String(Encoding.ASCII.GetBytes(clientId + ":" + clientSecret)) ); var response = await _httpClient.PostAsync("/token", new FormUrlEncodedContent(parameters)); var responseValue = await response.Content.ReadAsStringAsync(); }

 

通过上面的代码就可以看出在客户端需要做下面几件事情：

1、对client_id和client_secret进行Base64String编码，在iOS里有专门对NSString进行Base64编码的库，具体请参见NSData＋Base64。

2、将grant_type为"client_credentials"作为参数Post给服务器地址；

3、最后需要注意的是AFNetWorking 实现Basic 验证的时候，传值的时候注意Basic后面有一个空格，然后设置Content-Type为"application/x-www-form-urlencoded;charset=UTF-8"。这样就可以拿到access_token。代码如下：

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSString *client_id = @"1234";
NSString *client_secret = @"5678";

NSString *authStr = [NSString stringWithFormat:@"%@:%@",client_id,client_secret];
NSData *authData = [authStr dataUsingEncoding:NSUTF8StringEncoding];
NSString *authValue = [NSString stringWithFormat:@"Basic %@",[authData base64EncodedStringWithOptions:0]];

[manager.requestSerializer setValue:authValue  forHTTPHeaderField:@"Authorization"];
[manager.requestSerializer setValue:@"application/x-www-form-urlencoded;charset=UTF-8" forHTTPHeaderField:@"Content-Type"];

NSDictionary *params = @{@"grant_type":@"client_credentials"};

[manager POST:@"http://api.cnblogs.com/token" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON: %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", [error description]);
}];

这样就完成了本次场景的需求。实验以Basic 验证方式获取access_token。这样拿到服务端的授权以后就可以调用公开的API列表啦。

使用AFNetWorking 实现以Basic Authentication方式获取access-token

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