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Re: How to get more information about error code 7

From: Jason Proctor via curl-library <curl-library_at_cool.haxx.se>
Date: Thu, 19 Mar 2020 10:24:24 -0700

On Wed, Mar 18, 2020 at 11:29 PM Leo Song via curl-library
<curl-library_at_cool.haxx.se> wrote:
>
> Hello,
>
> My application is trying to access to a host, and getting Curl error code 7.
> Curl returned error code 7 - Couldn't connect to server
>
> I need to diagnose this a bit deeper and see what is happening. I've already implemented a callback function with CURLOPT_DEBUGFUNCTION, and the function displays messages related to "CURLINFO_TEXT", "CURLINFO_HEADER_IN" or "CURLINFO_HEADER_OUT".
>
> However, all I see in our log file is the above message with error code 7. It seems like I am not getting (and Curl is not logging) the error message or code from openssl or socket calls (if ever exist).
>
> Is there a way to retrieve that? I would appreciate if someone can pinpoint the code that does that.
>
> The version of libcurl is 7_66_0

Can you connect to your server using the Curl command line tool? That
would be a simple way of determining whether the client is doing
something wrong or the host is unavailable for some other reason.

hth
J
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Received on 2020-03-19