我目前正在使用 YouTube API 并允许用户订阅其他 channel ,但现在我应该发送一个包含“请求正文”的 POST 方法。
这是我应该发送的请求:
POST https://www.googleapis.com/youtube/v3/subscriptions?part=snippet&key={YOUR_API_KEY}
//The Request Body
{
"snippet": {
"resourceId": {
"channelId": "UCJZ7f6NQzGKZnFXzFW9y9UQ"
}
}
}
这是我当前的代码
+(void)subscribeToChannel:(NSString *)channelID {
GTMOAuth2Authentication *auth;
auth = [GTMOAuth2ViewControllerTouch authForGoogleFromKeychainForName:kKeychainItemName clientID:clientIDclientSecret:clientSecret];
NSString *urlStr;
NSMutableURLRequest *request;
urlStr = [NSString stringWithFormat:@"https://www.googleapis.com/youtube/v3/subscriptions?id=%@&key=mykey", channelID];
[request setHTTPBody:[@"{ \"snippet\": { \"resourceId\": { \"channelId\": \"UCJZ7f6NQzGKZnFXzFW9y9UQ\" } } }" dataUsingEncoding:NSUTF8StringEncoding]];
NSURL *url = [NSURL URLWithString:urlStr];
request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[auth authorizeRequest:request
completionHandler:^(NSError *error) {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,
(unsigned long)NULL), ^(void) {
NSString *output = nil;
if (error) {
output = [error description];
NSLog(@"ERRO LOADING INFO : %@", output);
} else {
NSURLResponse *response = nil;
NSData *data = [NSURLConnection sendSynchronousRequest:request
returningResponse:&response
error:nil];
if (data) {
output = [[NSString alloc] initWithData:data
encoding:NSUTF8StringEncoding];
} else {
output = [error description];
}
}
});
}];
}
我确信我在[request setHTTPBody]中做错了什么,但这是我唯一能想到的事情。
最佳答案
您尝试在分配 NSMutableURLRequest
实例之前设置 NSMutableURLRequest
的 HTTPBody。
NSString *urlStr;
// The request is nil
NSMutableURLRequest *request;
urlStr = [NSString stringWithFormat:@"https://www.googleapis.com/youtube/v3/subscriptions?id=%@&key=mykey", channelID];
// At this point the request is still nil so you are attempting to set the HTTPBody on a nil object
[request setHTTPBody:[@"{ \"snippet\": { \"resourceId\": { \"channelId\": \"UCJZ7f6NQzGKZnFXzFW9y9UQ\" } } }" dataUsingEncoding:NSUTF8StringEncoding]]
您还在评论中提到您收到“此 API 不支持解析表单编码输入”。错误。您可能会收到此错误,因为您没有设置内容类型(我通过谷歌搜索错误得出了这个结论。我可能是错的)。
这应该有效:
NSString * urlStr = [NSString stringWithFormat:@"https://www.googleapis.com/youtube/v3/subscriptions?id=%@&key=mykey", channelID];
NSURL *url = [NSURL URLWithString:urlStr];
NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
// Set the content type
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
// Create the dictionary that you will be using in the HTTPBody
NSDictionary * httpBody = @{
@"snippet": @{
@"resourceId": @{
@"channelId": channelID
}
}
};
// Make sure that the above dictionary can be converted to JSON data
if([NSJSONSerialization isValidJSONObject:httpBody])
{
// Convert the JSON object to NSData
NSData * httpBodyData = [NSJSONSerialization dataWithJSONObject:httpBody options:0 error:nil];
// set the http body
[request setHTTPBody:httpBodyData];
}
我在使用 Google Places API 查找地点时执行此操作,但其工作原理应该是相同的。
关于ios - 发送带有 "Body Requests"的 NSMutableURLRequest 请求,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23722929/