Ping
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Hi list,
How does one ping a host from Pharo? I see there is a #ping: method at Socket class, but it's painfully slow... I've tried to use ZnClient as follows:
But it's still way too slow... I don't want to perform a full GET request, just an ICMP one. Thanks! Bernat. Bernat Romagosa. |
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Socket class>>#ping does not do an ICMP ping at all, I doubt there is even a primitive to do that.
Socket does do only UDP/TCP sockets. I always thought that ICMP pings are not 'normal' UDP packets, but I could be wrong. If you know that the other end is an HTTP server, a HEAD request could be useful. I guess that what you mean by slow is that the timeouts are too high for a quick negative answer. There is ZnClinetTests>>#testIfFailNonExistingHost that fails pretty quickly, but that is for a non-existing DNS lookup. An actual connect does currently not honor the ZnClient>>#timeout: setting, that should be fixed, then you should be able to do ZnClient new beOneShot; timeout: 0; head: 'http://zn.stfx.eu'. I'll put it on my list. On 17 Sep 2012, at 17:44, Bernat Romagosa <[hidden email]> wrote: > Hi list, > > How does one ping a host from Pharo? I see there is a #ping: method at Socket class, but it's painfully slow... I've tried to use ZnClient as follows: > > isUp := [ (ZnClient new head: aUrl) isNil ] > on: Error > do: [ false ]. > > But it's still way too slow... I don't want to perform a full GET request, just an ICMP one. > > Thanks! > > Bernat. > > -- > Bernat Romagosa. -- Sven Van Caekenberghe http://stfx.eu Smalltalk is the Red Pill |
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In reply to this post by Bernat Romagosa
Search for the #ping: in ICMPSocket class, IIRC it is included in OpenQwaq.
Hernán On 17/09/2012 12:44, Bernat Romagosa wrote: > Hi list, > > How does one ping a host from Pharo? I see there is a #ping: method at > Socket class, but it's painfully slow... I've tried to use ZnClient as > follows: > > isUp := [ (ZnClient new head: aUrl) isNil ] > on: Error > do: [ false ]. > > > But it's still way too slow... I don't want to perform a full GET > request, just an ICMP one. > > Thanks! > > Bernat. > > -- > Bernat Romagosa. |
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On Sep 17, 2012, at 9:23 PM, Hernán Morales Durand wrote: > Search for the #ping: in ICMPSocket class, IIRC it is included in OpenQwaq. which is GPL so watch out… it is a plague and contagious. > > Hernán > > On 17/09/2012 12:44, Bernat Romagosa wrote: >> Hi list, >> >> How does one ping a host from Pharo? I see there is a #ping: method at >> Socket class, but it's painfully slow... I've tried to use ZnClient as >> follows: >> >> isUp := [ (ZnClient new head: aUrl) isNil ] >> on: Error >> do: [ false ]. >> >> >> But it's still way too slow... I don't want to perform a full GET >> request, just an ICMP one. >> >> Thanks! >> >> Bernat. >> >> -- >> Bernat Romagosa. > > |
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Thanks all! ICMPSocket ping: 'www.google.com'
This runs for a while and then a confirmation window pops up asking whether I'd like to keep waiting for the server. For now I'll go with my implementation and wait for Sven's fix.
Cheers!
2012/9/17 Stéphane Ducasse <[hidden email]>
Bernat Romagosa. |
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Hi Bernat,
On 18 Sep 2012, at 11:42, Bernat Romagosa <[hidden email]> wrote: > For now I'll go with my implementation and wait for Sven's fix. I fixed that this morning with the following commit: === Name: Zinc-HTTP-SvenVanCaekenberghe.303 Author: SvenVanCaekenberghe Time: 18 September 2012, 10:03:40 am UUID: 9f5a3863-fc08-470d-b8a1-d44169952a66 Ancestors: Zinc-HTTP-SvenVanCaekenberghe.302 Refactored ZnNetworkingUtils>>#socketStreamToUrlDirectly: to honor/use the correct timeout both when doing a DNS lookup as well as during connect by using NetNameResolver directly as well as using #openConnectionToHost:port:timeout: === Something like this should work: [ [ (ZnClient new beOneShot; enforceHttpSuccess: true; timeout: 1/10; head: 'http://www.google.com') isNil ] on: Error do: [ false ] ] timeToRun. But be careful, you are testing many things here: - that you have network access - that the hostname resolves (you can also specify an IP address to skp this) - that the host is reachable (that you can connect to it) - that it allows an HTTP connection - that it aswers to HEAD / HTH, Sven -- Sven Van Caekenberghe http://stfx.eu Smalltalk is the Red Pill |
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Hi Sven,
so cool! Most of these things are actually the ones I need to test, so everything should be okay :) Thanks a lot! Bernat.
2012/9/18 Sven Van Caekenberghe <[hidden email]> Hi Bernat, Bernat Romagosa. |
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www.yahoo.com also accepts pings
On 18 September 2012 06:58, Bernat Romagosa <[hidden email]> wrote: > Hi Sven, > > so cool! Most of these things are actually the ones I need to test, so > everything should be okay :) > > Thanks a lot! > > Bernat. > > 2012/9/18 Sven Van Caekenberghe <[hidden email]> >> >> Hi Bernat, >> >> On 18 Sep 2012, at 11:42, Bernat Romagosa <[hidden email]> >> wrote: >> >> > For now I'll go with my implementation and wait for Sven's fix. >> >> I fixed that this morning with the following commit: >> >> === >> Name: Zinc-HTTP-SvenVanCaekenberghe.303 >> Author: SvenVanCaekenberghe >> Time: 18 September 2012, 10:03:40 am >> UUID: 9f5a3863-fc08-470d-b8a1-d44169952a66 >> Ancestors: Zinc-HTTP-SvenVanCaekenberghe.302 >> >> Refactored ZnNetworkingUtils>>#socketStreamToUrlDirectly: to honor/use the >> correct timeout both when doing a DNS lookup as well as during connect by >> using NetNameResolver directly as well as using >> #openConnectionToHost:port:timeout: >> === >> >> Something like this should work: >> >> [ [ (ZnClient new >> beOneShot; >> enforceHttpSuccess: true; >> timeout: 1/10; >> head: 'http://www.google.com') isNil ] on: Error do: [ false ] ] >> timeToRun. >> >> But be careful, you are testing many things here: >> >> - that you have network access >> - that the hostname resolves (you can also specify an IP address to skp >> this) >> - that the host is reachable (that you can connect to it) >> - that it allows an HTTP connection >> - that it aswers to HEAD / >> >> HTH, >> >> Sven >> >> >> -- >> Sven Van Caekenberghe >> http://stfx.eu >> Smalltalk is the Red Pill >> >> >> >> > > > > -- > Bernat Romagosa. |
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Thanks for the info, I wasn't aware of that. 2012/9/18 Robert Shiplett <[hidden email]> www.yahoo.com also accepts pings Bernat Romagosa. |
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