认证后的 JSON API 请求

Question

伙计们，

在 iOS 中，我想在身份验证后发送 API 链接的身份验证我想使用 Accept: application/json 处理另一个 JSON 请求 API

我该怎么做？

我尝试了这种方法，但它不起作用：

NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"URL for authentication"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:120.0];

    [request setValue:@"application/json" forHTTPHeaderField:@"Content-type"];
    [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [request setHTTPMethod:@"POST"];
    //[request setHTTPBody:data];
    NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];


    [connection start];

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
    if ([challenge previousFailureCount] == 0) {
        NSLog(@"received authentication challenge");
        NSURLCredential *newCredential = [NSURLCredential credentialWithUser:@"username"
                                                                    password:@"pass"
                                                                 persistence:NSURLCredentialPersistenceForSession];
        NSLog(@"credential created");
        [[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];



        NSLog(@"responded to authentication challenge");

        // Second JSON Request API here


    }
    else {
        NSLog(@"previous authentication failure");
    }
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {

    NSLog(@"%@",response);

}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {


}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {

}

查看此链接

https://checkout.hackathon.sla-alacrity.com/catalogs/443b70de5cd4429e43e9da9b87d6468058d0ae737fd6b8771

这是表演

{ “错误”： { "message": "Accept header 无效。需要通过 HTTP Header Accept: application/json", “类型”：“bad_request” } }

Answer 1

您可以查看此answer。我也建议使用AFNetworking。

如果您使用的是基本 HTTP 身份验证，我认为不需要专门请求身份验证 URL，您应该首先简单地请求 JSON API。如果您事先有用户名和密码，则应在发出请求之前将它们设置在标头中：

#import "NSData+Base64.h"
...
NSString *authStr = [NSString stringWithFormat:@"%@:%@", @"username", @"pass"];
NSData *authData = [authStr dataUsingEncoding:NSASCIIStringEncoding];
NSString *authValue = [NSString stringWithFormat:@"Basic %@", [authData base64EncodedString]];
[request setValue:authValue forHTTPHeaderField:@"Authorization"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-type"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setHTTPMethod:@"POST"];

上面的代码有 NSData+Base64.h 依赖，你需要将它添加到你的项目中，你可以下载到：NSData+Base64 class and header

如果您提示用户输入凭据（代码中未显示）并且您确实需要在连接中设置凭据：didReceiveAuthenticationChallenge 仍然适用，您可以只使用您尝试创建的 URL在身份验证质询方法中：

// Second JSON Request API here