Laravel Valet/Nginx: 502 Bad Gateway: 93883#0: *613 upstream sent too big header while reading response header from upstream, client: 127.0.0.1

Question

I've tried increasing the buffer sizes as suggested in other threads. Here is the output of

sudo nginx -T | grep buffer

fastcgi_buffer_size 4096k;
fastcgi_buffers 128 4096k;
fastcgi_busy_buffers_size 4096k;
proxy_buffer_size   4096k;
proxy_buffers   128 4096k;
proxy_busy_buffers_size   4096k;

I've restarted valet but I am still getting the error when submitting a POST request after adding something to my cart using darryldecode/laravelshoppingcart.

Any suggestions?

Thanks in advance!

Did you ever figure out what the issue was? I’m having the same issue, albeit with [a different LaravelShoppingCart library](https://github.com/bumbummen99/LaravelShoppingcart/). I get the same “upstream sent too big header” error if I try to return a view or redirect after doing anything cart-related beyond listing the contents, like adding an item or restoring the cart from the database. — Janus Bahs Jacquet, Apr 22 '22 at 14:51

score 4 · Answer 1 · answered Jun 29 '21 at 11:28

I was getting this same error from my local Drupal 9 site. I've spent a few hours myself trying to find a solution that actually works for Valet (plus). After some trial and error the following steps solved the problem for me. Hope this helps anyone facing the same issue:

go to the nginx config folder:
```
cd /usr/local/etc/nginx
```
edit the nginx.conf file:
```
sudo nano nginx.conf
```

add these lines to the http{} section and save the file:
proxy_buffer_size 4096k;
proxy_buffers 128 4096k;
proxy_busy_buffers_size 4096k;

http {
    include mime.types;
    default_type  application/octet-stream;

    proxy_buffer_size 4096k;
    proxy_buffers 128 4096k;
    proxy_busy_buffers_size 4096k;

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    ...

edit the fastcgi_params file:
```
sudo nano fastcgi_params
```

append these lines to the end of the file:
fastcgi_buffer_size 4096k;
fastcgi_buffers 128 4096k;
fastcgi_busy_buffers_size 4096k;

fastcgi_param HTTPS   $https if_not_empty;
fastcgi_param REDIRECT_STATUS  200;
fastcgi_param HTTP_PROXY  "";
fastcgi_buffer_size 4096k;
fastcgi_buffers 128 4096k;
fastcgi_busy_buffers_size 4096k;

restart valet:
```
valet restart
```
Refresh the site in your browser

Laravel Valet/Nginx: 502 Bad Gateway: 93883#0: *613 upstream sent too big header while reading response header from upstream, client: 127.0.0.1

1 Answers1