Php-graph-sdk: Facebook network is unreachable

[rohit1290]

I am using facebook login for my website for past 1 and a half year. Till Feb 11 2016 the login was working fine and I started getting the following error from Feb 12th:
Facebook SDK returned an error: Failed to connect to 2a03:2880:2130:cf05:face:b00c:0:1: Network is unreachable

I raised a ticket with my service provider and they said that they don't support IPv6 routing. Then I spoke to Emil on facebook community group and he said that I should try IPv4 addresses. (https://www.facebook.com/groups/fbdevelopers/permalink/1024527960924051)

I added the following parameters in FacebookCurlHttpClient.php file to force IPv4:
CURLOPT_IPRESOLVE => CURL_IPRESOLVE_V4,

But then I started getting the following error:
Facebook SDK returned an error: connect() time out!

Kindly suggest. IPv6 and IPv4 both is not working for me!

[rohit1290]

Really appreciate if some can help me with this?

[rohit1290]

Updates the sdk to 5.0 and the problem was solved. I guess there was some issue with the sdk code.

[rohit1290]

I guess I was wrong. It's still not working.

[rohit1290]

Closing it. Unsolved. No hope of getting an answer.

[SammyK]

Hey @rohit1290! Do you mind leaving this open? I think there's a real bug here to be addressed. I'd like to try and duplicate the issue myself but haven't had time to poke at the SDK lately. :)

[rohit1290]

Ok. I am re-opening it.

[SammyK]

Yay! Thanks! :)

[juandpr]

Having the same problem
IPV6: Unreachable
IPV4: Timeout

[SammyK]

I curious if this is a limitation of the Graph API for providers that do not implement IPv6. I'm still not sure how I can set up an environment that will allow me to replicate this issue and test. Any ideas?

[juandpr]

I've forced CURL to use IPV4 and increased the timeout to 30 seconds, now it's working :+1:

[rohit1290]

@juandpr.. can you tell me where and what did you change in the source code for this!

[juandpr]

@rohit1290 yes Sir.
In my case, I am using Symfony2, so, it's using Buzz to execute the Curl requests.
I modified the vendor file (not recommended)
vendor/kriswallsmith/buzz/lib/Buzz/Client/Curl.php

and added the following in the function send()

curl_setopt($this->lastCurl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
curl_setopt($this->lastCurl, CURLOPT_TIMEOUT, 30);

[atefBB]

@rohit1290 I'm using laravel that use the same class (like symfony) in : vendor/kriswallsmith/buzz/lib/Buzz/Client/Curl.php to execute cUrl requests, I copied/pasted your code but it's not working.
Any ideas?

[rohit1290]

@atefBB which code?

[atefBB]

Excuse me, I mean the code of @juandpr !
Any way, have you solve this issue?!

[MartinLyne]

Is there going to be a pull request for this? Or an abstraction of the curl options so they can be edited without changing vendor files?

[SammyK]

@MartinLyne The HTTP Client is already abstracted and you can create a custom cURL client with custom options.

[juandpr]

In my case, it's still working with the hardcode fix I've made last year. If you find any cleaner solution please let me know. Thanks!

[yguedidi]

Thanks everybody! Closing as the solution looks like to be using a custom client.

[hellomedia]

@juandpr I used your fix, forcing ipv4, but I am now seeing slow page loading times for users connected with facebook. Did you experience that also ?

[juandpr]

@hellomedia Hello, no, for me it's working good. I think that you might have a problem with your network and that particular URL. Try doing a ping to that URL to check the latency.

[hellomedia]

Thanks @juandpr , I finally got it sorted out. The connection was re-initiated at every page load because of an issue with the application.

[juandpr]

@hellomedia great, good to know that you found the solution :)