Question

我在通过Objective-C POST请求检索Lyft API的访问令牌时遇到了问题（我对POST请求很新）。 Lyft API文档将此作为示例请求进行了详细说明：

POST /oauth/token HTTP/1.1
Authorization: Basic base64(client_id:client_secret)
Content-Type: application/json;charset=UTF-8

{
  "grant_type": "authorization_code",
  "code": "<authorization_code>"
}

这是他们文档中的卷曲请求：

curl -X POST -H "Content-Type: application/json" \
     --user "<client_id>:<client_secret>" \
     -d '{"grant_type": "authorization_code", "code": "<authorization_code>"}' \
     'https://api.lyft.com/oauth/token'

我如何在Objective-C中实现这一点？这是我现在的代码：

    NSString *post = [[NSString alloc] initWithFormat: @"{grant_type: client_credentials, scope: public}"];
    NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];

    NSURL *lyftURL = [NSURL URLWithString: @"https://api.lyft.com/oauth/token"];
    NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:lyftURL];

    [req setHTTPMethod:@"POST"];
    [req addValue: @"application/json" forHTTPHeaderField: @"Content-Type"];

    NSString *authStr = [NSString stringWithFormat:@"%@:%@", @"UK83N70T5vBx", @"6Fw8SnbIXPJ9v9_OnBRczvP1DIXqD1H2"];
    NSData *authData = [authStr dataUsingEncoding:NSUTF8StringEncoding];
    NSString *authValue = [NSString stringWithFormat:@"Basic %@", [authData base64Encoding]];
    [req setValue:authValue forHTTPHeaderField:@"Authorization"];

    [req setHTTPBody: postData];

    [NSURLConnection sendAsynchronousRequest: req queue: [NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
        if (connectionError)
            NSLog(@"ERROR");
        else {
            NSLog(@"DATA: %@", data);

            NSError* error;
            NSDictionary* lyftJSON = [NSJSONSerialization JSONObjectWithData:data
                                                                       options:kNilOptions
                                                                         error:&error];
            NSLog(@"JSON: %@", lyftJSON);

        }
    }];

我收到以下错误：'无法找到或解析grant_type，您是否正确设置了Content-Type标头？'

以下是Lyft文档的链接：[https://developer.lyft.com/docs/authentication][1]

如果我能够知道我的问题在我的代码中的位置，那就太棒了。

具有Lyft API访问令牌的Objective-C中的POST请求

0 个答案: