NSMutableURLRequest和“请求主体流耗尽”错误 [英] NSMutableURLRequest and "request body stream exhausted" error

问题描述

我有一个问题与http PUT请求和请求正文作为流文件。

无论文件的大小，我得到错误NSURLErrorDomain -1021请求body stream exhausted

我知道我可以通过实现方法重写这个问题：
- （NSInputStream *）connection：（NSURLConnection *）connection needNewBodyStream :( NSURLRequest *）request

但是这种方法不好，因为它会再次上传整个文件，而40 MB的文件是80 Mb的数据传输。 / p>

如果我采用与NSData相同的文件并设置请求主体它工作正常。

请求异步并同步同步两个结果。

这里是我的代码，简单和类似于来自苹果的示例：

  NSURL * url = [NSURL URLWithString：[self concatenatedURLWithPath：path]]; 
 NSMutableURLRequest * req = [[NSMutableURLRequest alloc] initWithURL：url]; 
 [req setHTTPMethod：@PUT]; 
 [req setCachePolicy：NSURLRequestReloadIgnoringLocalCacheData]; 
 [request setTimeoutInterval：DEFAULT_TIMEOUT]; 
 [req setValue：_contentType forHTTPHeaderField：@Content-Type]; 
 NSInputStream * fileStream = [NSInputStream inputStreamWithFileAtPath：_dataStreamLocation]; 
 
 [req setHTTPBodyStream：fileStream]; 
 _connection = [[NSURLConnection connectionWithRequest：req delegate：self] retain]; 
  

我做错了什么？
我错过了什么？

谢谢！

Eitan

解决方案

从它的外观，你似乎没有在标题中设置@Content-Length。

我这样做的方式是这样：

  NSUInteger fileSize = [[[[NSFileManager defaultManager] attributesOfItemAtPath ：_dataStreamLocation error：nil] objectForKey：NSFileSize] unsignedIntegerValue]; 
 [request setValue：[NSString stringWithFormat：@％u，fileSize] forHTTPHeaderField：@Content-Length]; 
  

无论哪种方式，我正在做批量上传，偶尔会得到body stream exhaustion错误。从我可以告诉，问题是，我只有很少的设备上的可用空间，临时文件将在一些上传完成之前自动删除（当接收到我测试的错误，以检查文件是否仍然存在，和它不是）。

I have a problem with http PUT request and request body as stream from file.

No matter what the size of the file i get error "NSURLErrorDomain -1021 request body stream exhausted"

I know i can override this problem by implementing the method: -(NSInputStream*)connection:(NSURLConnection *)connection needNewBodyStream:(NSURLRequest *)request

but this approach is not good as it will upload the whole file again, and 40 MB of file turns out to be 80 Mb of data transfer.

if i take the same file as NSData and set the request body it works fine.

I tried sending the request Async and sync same result in both.

Here is my code, simple and similar to example from Apple:

NSURL *url = [NSURL URLWithString:[self concatenatedURLWithPath:path]];
NSMutableURLRequest *req = [[NSMutableURLRequest alloc] initWithURL:url];
[req setHTTPMethod:@"PUT"];
[req setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
[request setTimeoutInterval:DEFAULT_TIMEOUT];
[req setValue:_contentType forHTTPHeaderField:@"Content-Type"];
NSInputStream *fileStream = [NSInputStream inputStreamWithFileAtPath:_dataStreamLocation];

[req setHTTPBodyStream:fileStream];
_connection = [[NSURLConnection connectionWithRequest:req delegate:self] retain];

Am i doing something wrong? Am i missing something?

Thanks!

Eitan

解决方案

From the looks of it, it seems that you're not setting @"Content-Length" in the header.

The way I do it is like this:

NSUInteger fileSize = [[[[NSFileManager defaultManager] attributesOfItemAtPath:_dataStreamLocation error:nil] objectForKey:NSFileSize] unsignedIntegerValue];
[request setValue:[NSString stringWithFormat:@"%u", fileSize] forHTTPHeaderField:@"Content-Length"];

Either way, I was doing batch uploading and occasionally got the body stream exhaustion error. From what I could tell, the issue was that I only had few free space on the device, and the temporary files would get deleted automatically before some uploads being finished (when receiving the error I tested to check if the file was still there, and it wasn't).

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