2021-11-26 一种实际上返回了内容却提示请求失败的网络异

一种实际上返回了内容却提示请求失败的网络异常案例

遇到一种server请求，内容返回了，但是网络库返回请求失败：

Content-Type: application/json;charset=utf-8
Content-Length: 100

看了下，因为返回的状态是close

Connection: close

这种到底是什么网络错误呢？

打断点： 发现进入到了NSURLSessionTaskDelegate回调：

- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error

error信息

Error Domain=NSURLErrorDomain Code=-1005 "网络连接已中断。" UserInfo=

{_kCFStreamErrorCodeKey=-4, 

NSUnderlyingError=0x283a8cc30 

{Error Domain=kCFErrorDomainCFNetwork Code=-1005 "(null)"
 UserInfo=
 {NSErrorPeerAddressKey=<CFData 0x281660690 [0x1ff36f730]>
 {length = 16, capacity = 16, bytes = 0x1002043a7f0000010000000000000000},
  _kCFStreamErrorCodeKey=-4, 
  _kCFStreamErrorDomainKey=4}}, 
  _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <B40780FD-05EB-4D25-BCA7-ACB8D9C57A72>.<6>, _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDataTask <B40780FD-05EB-4D25-BCA7-ACB8D9C57A72>.<6>"
), 
NSLocalizedDescription=网络连接已中断。, 
NSErrorFailingURLStringKey=https://xxx.xxxx.com/app/securePhone?id=20122222222&type=0&phone=18888888888&ipAddr=1x.xx.xx.xx, NSErrorFailingURLKey=https://xxxx.xxxx.com/app/securePhone?id=20122222222&type=0&phone=18888888888&ipAddr=1x.xx.xx.xx, _kCFStreamErrorDomainKey=4}