Error 400 Bad Request when trying to access ojs

Software Support
1

Hello everyone,
I’m trying to access an instance of ojs cloned from a production server, but when I try to access the base address I’m getting a 400 Bad Request error.
I’m using version 3.3.0-10 of ojs. Could someone give me a way?
Thanks,
Marcelo

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image1917×929 92.4 KB

2

Hello @Marcelo_Zoel,

In the case of errors such as these (400 or 500) it is best to check your PHP error logs - are you able to do that and report back? If unsure of how to check your PHP error log, please see this post here: How do I find my PHP error log?

-Roger
PKP Team

4

Hi @Marcelo_Zoel,

Check the allowed_hosts setting in your config.inc.php.

Regards,
Alec Smecher
Public Knowledge Project Team

5

Hi Roger, thanks for the tip,

Strangely, the PHP log is not recording any errors, despite the configuration in php.ini being error_reporting = E_ALL, is recording only service start and stop.

07-Jan-2025 13:54:37] NOTICE: fpm is running, pid 85845
[07-Jan-2025 13:54:37] NOTICE: ready to handle connections
[07-Jan-2025 13:54:37] NOTICE: systemd monitor interval set to 10000ms
[07-Jan-2025 13:59:05] NOTICE: Terminating …
[07-Jan-2025 13:59:05] NOTICE: exiting, bye-bye!

Since this is a homologation server, I activated display_errors to display the errors on the screen and there was no record either.

6

Hi Alec, thanks for the reply.

The value of the allowed_host variable is as follows:

allowed_hosts = ‘[“jgsbh.sgb.local”, “10.200.0.87”, “localhost”, “127.0.0.1”]’

where jgsbh.sgb.local is the canonical name of the service (as defined in the apache’s vhost, not the server hostname*) and 10.200.0.87 is the respective IP of the server where ojs runs.

Do you have any tips for trying to debug this problem?

  • I also tried as the server name without success.
8

Hi @Marcelo_Zoel,

Looking at the screenshot, the fact that even the request for favicon.ico came back as a 400 Bad Request suggests that you’ve got a web server misconfiguration. favicon.ico is a file, and so the request doesn’t even go through the OJS code.

Regards,
Alec Smecher
Public Knowledge Project Team

9

Hi Alec, following your line of reasoning, I took a look at the configuration of the vhost associated with ojs and disabled the RewriteEngine that was configured:

RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ index.php/$1 [QSA,L]

From then on, I was able to perform the query normally. Now, I don’t know why this same behavior doesn’t occur on the production server since it has the same configuration.

Since the problem is not specifically related to ojs, I consider this ticket as resolved and I want to thank the colleagues who spent their precious time helping to resolve this issue.
See you next time, everyone.

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