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Re: SCNetworkCheckReachabilityByName
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Re: SCNetworkCheckReachabilityByName


  • Subject: Re: SCNetworkCheckReachabilityByName
  • From: Daniel Todd Currie <email@hidden>
  • Date: Thu, 29 Apr 2004 14:21:34 -0700

yep, that was the problem. passing "www.apple.com" to SCNetworkCheckReachabilityByName() works perfectly. thanks for your concise and well-informed reply.


On 2004 Apr 29, at 13:50, b.bum wrote:

On Apr 29, 2004, at 1:17 PM, Daniel Todd Currie wrote:
My network connection is stable, and I am certain that the URL in versionURLString is valid, since I continue to read the data in that URL, regardless of the results of SCNetworkCheckReachabilityByName. I am hooked up directly to my DSL modem, so I am certain it is not a firewall/etc. issue.

Any ideas would be greatly appreciated.

-- Daniel Currie

PS: Another question is why on earth does the reachability stuff take over 4 seconds on my 768k DSL and 1.33 GHz G4? I don't expect an answer for that one though...

SCNetworkCheckReachabilityByName() wants a bare hostname, not a URL. The documentation specifically states that it wants a hostname in the same form as what is required by gethostbyname(). In your case, this probably means a fully qualified host name like "www.yahoo.com" or "pyobjc.sourceforge.net".

This may also explain why it is taking so long to resolve. You are dropping an URL into a context that only wants a bare hostname. Depending on the configuration of your network connection or your provider's infrastructure, the lookup may need to fail a few times before a host-not-found response is returned to your app.

http://cocoa.mamasam.com/COCOADEV/2003/03/1/58893.php

b.bum
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References: 
 >SCNetworkCheckReachabilityByName (From: Daniel Todd Currie <email@hidden>)
 >Re: SCNetworkCheckReachabilityByName (From: "b.bum" <email@hidden>)

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