[erlang-questions] ibrowse compile error

Scott Zhang <>
Wed Feb 18 14:19:54 CET 2009


Hi. All. and kenneth.

Just tested on my Linux machine. Both http client and ibrowse work. So the
issue only happen on window.

" windows 2003 server R2 "

As I observed, seems erl's low level tcp can't detect tcp shutdown or things
like.  As tracked by wireshark, the tcp has been closed,  But erlang hungs
there. This only happen on windows server 2003 R2. (I tested on my 2 servers
as I talked previously)

I guess it is a bug in windows binary release.

Where can we post a bug?

Regards.

scott

On Wed, Feb 18, 2009 at 4:11 PM, Scott Zhang <>wrote:

> wireshare screenshot.
> Any idea?
>
> On Wed, Feb 18, 2009 at 4:06 PM, Scott Zhang <>wrote:
>
>> Actually I tried on 2 server one in China and one in US. Both of them are
>> not working.
>> And more, I have to use wireshark to track the package for this http
>> session.  I saw when I was using firefox and .NET program to get this url. I
>> saw the correct GET + many many continueous and at end, it get an Response
>> Code 200. Then everything is fine.
>>
>> When I am using http client and ibrowse, I saw the correct GET + many many
>> continueous
>> 30821 2503.516971 67.55.101.167 192.168.1.101 TCP [TCP segment of a
>> reassembled PDU]
>>
>> then
>> sometimes, I never saw the Response Code 200. Sometimes, I saw the
>> response Code 200 but the erlang program is still blinking there?
>>
>> I have another question, is there a possibility erlang's low level TCP
>> implement has flaw to make it unable to detect tcp shutdown or keepalive? If
>> not why http client and ibrowse can't run correct?
>>
>>
>> Regards.
>> Scott
>>
>>
>>
>> On Wed, Feb 18, 2009 at 3:58 PM, Scott Zhang <>wrote:
>>
>>> Hi. Nicolas.Please check my attachment.
>>>
>>> I did exactly what you told. It is still not working. I'm glad if I can
>>> get a no proc error instead a endless blinking.
>>>
>>> Regards.
>>> Scott
>>>
>>> On Wed, Feb 18, 2009 at 3:34 PM, Nicolas Charpentier <
>>> > wrote:
>>>
>>>> Hi,
>>>>
>>>> Scott Zhang wrote:
>>>>
>>>>> Hi. All. Another big issue with http client within erlang distribution
>>>>> and ibrowse.  That makes me start to wonder is ibrowse/http client really
>>>>> working?
>>>>>
>>>>> Please try following url.
>>>>> http://www.cisworldwide.com/xweb/xweb_parser.php?premiumredirect=http%3A%2F%2Fwww.cisworldwide.com%2Fxweb%2Fpremiumsearches%2FxmlNewBackgroundSearch.php%3Fatype%3Dcaps%26fname%3Dscott%26middle_initial%3D%26lname%3Dzhang%26city%3D%26state%3D%26zip%3D%26client_reference%3Dplutux%40harbork.%26cisrestype%3Dunlimited_background&code=11111111&cemail=macromarship@gmail.com...
>>>>> But whether I use http client or ibrowse, they never returns, just hang
>>>>> there, even I wait for 10 minutes.
>>>>>
>>>> > ...
>>>>
>>>>  1. http client
>>>>> get_url(Url) ->
>>>>> case http:request(get, {Url, []}, [], []) of
>>>>> {ok, {{Version, 200, ReasonPhrase}, Headers, Body}}  ->
>>>>> Body;
>>>>> _ -> sleep(500),get_url(Url)
>>>>> end.
>>>>>
>>>>
>>>> It tried inets http client with your url and it works for me.
>>>> Looking at your code, there is an infinite loop if the response isn't ok
>>>> (and response code 2000). Did you tried just this ?
>>>>
>>>> 1> inets:start().
>>>> 2> Url = "your long url".
>>>> 3> http:request(get, {Url, []}, [], []).
>>>>
>>>>
>>>> The inets application must be started before the request otherwise
>>>> you'll get an noproc error (I thing that it's your case).
>>>>
>>>>
>>>> Regards,
>>>> -----
>>>> Nicolas Charpentier
>>>> http://charpi.net
>>>>
>>>
>>>
>>
>
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