fphttpclient last version
lazarus / 38-Networking and Web Programming

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luca · 2021-10-12 08:41

Hi,
I made some test to get some information from a intranet site.

I'm using method get of fphttpclient.

I received a timeout error during the operation: I guess it's a
problem to reach the IP of the server when I'm connected from home to
my office.

I tried to use Delphi THTTPClient and it works in the proper way; the
same for a test made using C# and the method getResponse of WebRequest
class.

I look at the IP address of the host. While Lazarus show an IP4
address, running C# the address is an IP6.

Can you help me to understand?

Thanks
Luca

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Warfley · 2021-10-12 14:25

Well pretty simple, the fphttpclient uses the TInetSocket from the
ssockets unit and this is simply not IPv6 ready

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luca · 2021-10-12 15:17

Many thanks,
do you know if there is another component I can use to work around the
problem?

Regards
Luca

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Warfley · 2021-10-12 15:19

There are many networking libraries. Indy, Synapse or LNet. I don't
know about the current state of Delphi, but last time I used it, it
shipped Indy, so if you are familiar with doing it in Delphi, it's
probably with Indy

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luca · 2021-10-13 19:25

I'm using Indy.

I found a solution in this
https://stackoverflow.com/questions/15166939/how-to-configure-
indy-v10-to-support-ipv4-ipv6

I tried to get the URL using a short connection timeout (2000ms). In
case of error I make a new get request by enclosing hostname between
square brakets to force Indy to use IPv6.

Hope It can be useful.

Regards.
Luca