getting uwsgi error when using ngx.req.set_header

dhwillem · 2017-11-05T13:38:25+00:00

Hi folks, I've just kicked out a new release candidate, OpenResty 1.13.6.1 RC1, for the community to test out: https://openresty.org/download/openresty...

getting uwsgi error when using ngx.req.set_header

dhwillem

I am using content_by_lua_block to retrieve some values from memcached and then pass these to another location directive to use as a cache key.

I'm running into an issue where uwsgi is returning "invalid uwsgi request (current strsize: 28532). skip" when setting custom headers.

This is the error from nginx:

2017/11/05 05:20:35 [error] 1339#1339: *6 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 172.18.0.12, server: , request: "GET /test HTTP/1.1", upstream: "uwsgi://unix:///var/run/nginx/app.sock:", host: "local.develop.com"

uwsgi error:

invalid uwsgi request (current strsize: 28532). skip

The location directives

location /test {

    content_by_lua_block {

        local utils = require "utils"

        local session_info = utils.get_session_user_and_team_id()

        ngx.req.set_header('proxy-team-id', session_info.team_id)

        ngx.req.set_header('proxy-user-id', session_info.user_id)

        ngx.exec("@myapp")

        return

     location @myapp {
        set $cache_key "nginx_${http_proxy_user_id}_${http_proxy_team_id}";

        srcache_fetch GET /memc $cache_key;
        srcache_store PUT /memc $cache_key;
        srcache_store_statuses 200 301 302;

        include uwsgi_params;
        uwsgi_pass appupstream;
    }

The request works when I comment out the set_header fields, this leads me to think maybe lua / ngx.exec is not properly doing the uwsgi_pass or something ?

Maybe there is a better way to do this kind of forwarding, I used ngx.exec since set_by_lua_block does not support making calls to memcaced.

openresty/1.11.2.5

uwsgi 2.0.15

Using this from inside docker container python:2.7.14-slim.

dhwillem

Resolved the issue. The value in session_info.team_id contained an entire response body due to a bug, causing the headers to be to big.

On Saturday, November 4, 2017 at 10:38:25 PM UTC-7, willem dhaeseleer wrote:

I am using content_by_lua_block to retrieve some values from memcached and then pass these to another location directive to use as a cache key.
I'm running into an issue where uwsgi is returning "invalid uwsgi request (current strsize: 28532). skip" when setting custom headers.

This is the error from nginx:

2017/11/05 05:20:35 [error] 1339#1339: *6 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 172.18.0.12, server: , request: "GET /test HTTP/1.1", upstream: "uwsgi://unix:///var/run/nginx/app.sock:", host: "local.develop.com"

uwsgi error:

invalid uwsgi request (current strsize: 28532). skip

The location directives
location /test {
    content_by_lua_block {
        local utils = require "utils"
        local session_info = utils.get_session_user_and_team_id()
        ngx.req.set_header('proxy-team-id', session_info.team_id)
        ngx.req.set_header('proxy-user-id', session_info.user_id)
        ngx.exec("@myapp")
        return
    }
}
     location @myapp {
        set $cache_key "nginx_${http_proxy_user_id}_${http_proxy_team_id}";

        srcache_fetch GET /memc $cache_key;
        srcache_store PUT /memc $cache_key;
        srcache_store_statuses 200 301 302;

        include uwsgi_params;
        uwsgi_pass appupstream;
    }
The request works when I comment out the set_header fields, this leads me to think maybe lua / ngx.exec is not properly doing the uwsgi_pass or something ?

Maybe there is a better way to do this kind of forwarding, I used ngx.exec since set_by_lua_block does not support making calls to memcaced.

openresty/1.11.2.5
uwsgi 2.0.15

Using this from inside docker container python:2.7.14-slim.