Can't connect to host: https://godotengine.org/asset-library/api

[APoniatowski]

Godot version:
3.1 stable

OS/device including version:
Manjaro KDE (Latest and up-to-date)

Issue description:
Getting the error when opening the AssetLib tab. I get an error in my console/terminal when clicking search:

ERROR: _get_socket_error: Socket error: 101
At: drivers/unix/net_socket_posix.cpp:199.
ERROR: connect_to_host: Connection to remote host failed!
At: drivers/unix/net_socket_posix.cpp:339.
ERROR: _get_socket_error: Socket error: 101
At: drivers/unix/net_socket_posix.cpp:199.
ERROR: connect_to_host: Connection to remote host failed!
At: drivers/unix/net_socket_posix.cpp:339.
ERROR: _get_socket_error: Socket error: 101
At: drivers/unix/net_socket_posix.cpp:199.
ERROR: connect_to_host: Connection to remote host failed!
At: drivers/unix/net_socket_posix.cpp:339.

Steps to reproduce:
1 - open godot (via GUI or terminal)
2 - open project
3 - open AssetLib

Minimal reproduction project:

[APoniatowski]

curl gives me this:

curl https://godotengine.org/asset-library/api

<title>301 Moved Permanently</title>

Moved Permanently

The document has moved here.

---

Apache Server at godotengine.org Port 443

[Calinou]

@APoniatowski This is expected from curl if you contact http://godotengine.org/asset-library/api, since the backend redirects all requests to HTTPS.

Edit: I didn't notice the URL used was HTTPS, so it's due to something else.

Are you using a compiled binary, or have you compiled Godot from source?

[APoniatowski]

I contacted https :) and wget gives me 404 (it sees the 301 and follows the https)... I wonder if ipv6 might be the problem as it fails to connect, but doubtful though:
wget https://godotengine.org/asset-library/api
--2019-04-09 20:31:06-- https://godotengine.org/asset-library/api
Loaded CA certificate '/etc/ssl/certs/ca-certificates.crt'
Resolving godotengine.org (godotengine.org)... 2a02:2178:1000:201::4, 212.85.158.4
Connecting to godotengine.org (godotengine.org)|2a02:2178:1000:201::4|:443... failed: Network is unreachable.
Connecting to godotengine.org (godotengine.org)|212.85.158.4|:443... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://godotengine.org/asset-library/api/ [following]
--2019-04-09 20:31:07-- https://godotengine.org/asset-library/api/
Reusing existing connection to godotengine.org:443.
HTTP request sent, awaiting response... 404 Not Found
2019-04-09 20:31:07 ERROR 404: Not Found.

oh and I'm using the compiled binary. I assume it is better to compile it, right? ;)

[APoniatowski]

Also downloaded RC3, just to be sure, and still the same result... I'll git clone it later and compile it, to see if I get the same result

[akien-mga]

CC @bojidar-bg @Faless

[Faless]

Oh, I see. The user has a broken IPv6 connection and a valid IPv4 connection.
The OS getaddrinfo returns an IPv6 (probably preferred by OS) and then HTTPClient fails.
Connecting to the IPv4 address of the asset lib would work.

The official solution is to use an algorithm called Happy Eyeball (sic!) and a standardized version has even been published as RFC8305 -.- .

This has to be addressed in the HTTPClient, by resolving both IP addresses, connect to both as soon as each address is resolved, and only failing if both resolutions or connections fail.
The first established connection is used, the other closed immediately.

This is also what wget in fact does for the user (see bold):

--2019-04-09 20:31:06-- https://godotengine.org/asset-library/api
Loaded CA certificate '/etc/ssl/certs/ca-certificates.crt'
Resolving godotengine.org (godotengine.org)... 2a02:2178:1000:201::4, 212.85.158.4
Connecting to godotengine.org (godotengine.org)|2a02:2178:1000:201::4|:443... failed: Network is unreachable.
Connecting to godotengine.org (godotengine.org)|212.85.158.4|:443... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://godotengine.org/asset-library/api/ [following]
--2019-04-09 20:31:07-- https://godotengine.org/asset-library/api/
Reusing existing connection to godotengine.org:443.
HTTP request sent, awaiting response... 404 Not Found
2019-04-09 20:31:07 ERROR 404: Not Found.

A temporary solution could be to add an editor setting to disable IPv6 resolution completely.

An even more temporary solution for this specific user could be to disable IPv6 system wide.

[APoniatowski]

I'll try disabling IPv6 in the editor (point and click adventure, maybe?) or (nvm, reread the above comment) disable my DHCPv6 service on my firewall (pfsense), as I was using a tunnel broker (hurricane electric), but it caused problems, so I disabled the IPv6 WAN interface, but not DHCPv6 (splitting IPv4 and IPv6 with my ISP and HE was causing internet instability). So I am waiting for a new ISP to install their line in my house.
I'm not sure what the conditions are for the checks in the editor, if IPv6 should fail && IPv4 succeeds, return fail? this is pure speculation on my end... I haven't looked at the scripts, nor am I currently in the mood to investigate. ;)

[Calinou]

Closing in favor of #36418 which has more information about the issue at hand.

[AgSmith95]

Hi, I am experiencing this issue on my MacOS right now, but I have my IPV6 disabled

tmp % wget https://godotengine.org/asset-library/api
--2023-01-16 23:48:50--  https://godotengine.org/asset-library/api
Resolving godotengine.org (godotengine.org)... 172.67.193.253, 104.21.36.120
Connecting to godotengine.org (godotengine.org)|172.67.193.253|:443... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://godotengine.org/asset-library/api/ [following]
--2023-01-16 23:48:50--  https://godotengine.org/asset-library/api/
Reusing existing connection to godotengine.org:443.
HTTP request sent, awaiting response... 404 Not Found
2023-01-16 23:48:50 ERROR 404: Not Found.

tmp % curl https://godotengine.org/asset-library/api
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>301 Moved Permanently</title>
</head><body>
<h1>Moved Permanently</h1>
<p>The document has moved <a href="https://godotengine.org/asset-library/api/">here</a>.</p>
<hr>
<address>Apache Server at godotengine.org Port 443</address>
</body></html>

[bojidar-bg]

https://godotengine.org/asset-library/api is supposed to 404, so maybe you should test with https://godotengine.org/asset-library/api/configure instead? (: (also, might be worth a new issue, this one is rather old now)