HTTP 请求内存泄漏

发布于 2024-11-27 10:52:33 字数 1362 浏览 0 评论 0原文

我正在使用这段代码，但在分析时，它告诉我在 response_error、request 和 _response 变量中存在许多内存泄漏。

我尝试了几个地方来放置函数中使用的每个变量的释放代码，但它也不断崩溃，有或没有错误消息。（最常见的是 EXC_BAD_ACCESS 指向内存访问错误）

我认为这可能是 NSURLConnection sendSynchronousRequest 方法的问题，但我不确定。

有人可以给我建议或将 release 块放置在这段代码的正确位置吗？

谢谢，

NSString *request_url = [NSString stringWithFormat:@"http://www.server.com/api/arg1/%@/arg2/%@/arg3/%@",self._api_key,self._device_id,self._token];
NSURL *requestURL = [NSURL URLWithString:request_url];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:requestURL];
NSError *response_error = [[NSError alloc] init];
NSHTTPURLResponse *_response = [[NSHTTPURLResponse alloc] init];
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:&_response error:&response_error];
NSString *str_response = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];
return [[str_response JSONValue] valueForKey:@"pairing"];

变量的定义如下

@interface MyClass : NSObject {
  NSString *_device_id;
  NSString *_token;
  NSString *_api_key;
}
@property (nonatomic,retain) NSString *_device_id;
@property (nonatomic,retain) NSString *_api_key;
@property (nonatomic,retain) NSString *_token;

原文

I'm using this code, but when profiling, it tells me I have a many memory leaks within response_error, request and _response variables.

I tried several places to put a release code of each variable used in function, but it keeps crashing with and without error message too. (most often it is EXC_BAD_ACCESS which points to memory access error)

I think it could be problem of NSURLConnection sendSynchronousRequest method, but I'm not sure.

Can somebody please give me an advice or place release blocks in right place of this code?

Thanks

NSString *request_url = [NSString stringWithFormat:@"http://www.server.com/api/arg1/%@/arg2/%@/arg3/%@",self._api_key,self._device_id,self._token];
NSURL *requestURL = [NSURL URLWithString:request_url];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:requestURL];
NSError *response_error = [[NSError alloc] init];
NSHTTPURLResponse *_response = [[NSHTTPURLResponse alloc] init];
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:&_response error:&response_error];
NSString *str_response = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];
return [[str_response JSONValue] valueForKey:@"pairing"];

where variables are defined like

@interface MyClass : NSObject {
  NSString *_device_id;
  NSString *_token;
  NSString *_api_key;
}
@property (nonatomic,retain) NSString *_device_id;
@property (nonatomic,retain) NSString *_api_key;
@property (nonatomic,retain) NSString *_token;

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冷情 2024-12-04 10:52:33

您通过不必要的分配来泄漏 _respone 和 response_error 。您将一个指向您的指针的指针传递给一个方法，该方法只会更改该指针，从而产生泄漏。您还需要自动释放 str_response

NSError *response_error = nil; //Do not alloc/init
NSHTTPURLResponse *_response = nil; //Do not alloc/init
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:&_response error:&response_error];
NSString *str_response = [[[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding] autorelease];
return [[str_response JSONValue] valueForKey:@"pairing"];

You are leaking _respone and response_error by needlessly allocating them. You are passing a pointer to your pointer to a method that will just change the pointer creating a leak. Also you need to autorelease str_response

NSError *response_error = nil; //Do not alloc/init
NSHTTPURLResponse *_response = nil; //Do not alloc/init
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:&_response error:&response_error];
NSString *str_response = [[[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding] autorelease];
return [[str_response JSONValue] valueForKey:@"pairing"];

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