从NSUrlConnection didReceiveAuthenticationChallenge中提供有意义的错误 [英] Provide Meaningful Error from NSUrlConnection didReceiveAuthenticationChallenge

问题描述

我正在使用OWASP示例进行

最好提供一条类似警告：标识网站的公钥已更改...的文本消息。

另一个小的：在连接：didFailWithError：，我不知道-1012是否是由于固定失败或另一个网络错误。所以我想提供的消息只是为证书失败，而不是其他-1012错误。

如何提供丰富的错误信息 code> [[challenge sender] cancelAuthenticationChallenge：challenge] （当连接：didReceiveAuthenticationChallenge：失败时调用）。 NSURLConnectionDelegate协议参考和< a href =http://developer.apple.com/library/mac/#documentation/cocoa/reference/foundation/Protocols/NSURLAuthenticationChallengeSender_Protocol/Reference/Reference.html =nofollow noreferrer> NSURLAuthenticationChallengeSender协议参考

pre> NSString * alertMessage = [challenge.error localizedFailureReason];


以获取可读的错误信息。

请参阅 NSError 和 NSURLAuthenticationChallenge 。

I'm working with the OWASP sample for Certificate and Public Key Pinning. The sample uses random.org, and random.org recently got a new certificate. That means connection:didReceiveAuthenticationChallenge: is failing. That is expected and good :)

However, the failure is displayed as "NSURLErrorDomain", with a code of -1012. That's not very helpful, and a user will not be able to do anything meaningful with it:

It would be much better to supply a message with text similar to "Warning: the public key identifying the website has changed...".

Another little nit: in connection:didFailWithError:, I cannot tell if the -1012 is due to the pinning failure or another network error. So I would like to supply the message only for the certificate failure, and not other -1012 errors.

How does one supply "rich error information" to the call of [[challenge sender] cancelAuthenticationChallenge: challenge] (which is called when connection:didReceiveAuthenticationChallenge: fails). NSURLConnectionDelegate Protocol Reference and NSURLAuthenticationChallengeSender Protocol Reference do not mention how to do so.

解决方案

Try to use

NSString * alertMessage = [challenge.error localizedFailureReason];

to get human readable error information.

See documentation for NSError and NSURLAuthenticationChallenge.

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