Hello!
On Thu, Sep 18, 2014 at 9:02 AM, jpsonweb wrote:
> I was able to post the parameter from nginx by passing the arguments using
> this.
> local maken_res = ngx.location.capture("/test", { method = ngx.HTTP_POST,
> args = { pagelayout = dev_res_encoded }});
>
You're passing your args via URI arguments rather than POST body. See
https://github.com/openresty/lua-nginx-module#ngxlocationcapture
"* args
specify the subrequest's URI query arguments (both string value and
Lua tables are accepted)
"
> This works only when post parameter size is less than 81568 characters. When
> the parameter size is greater than 81568, we get error 502.
>
Apparently you're hitting the URL length limit on your backend server.
BTW, it's better to post such questions to the openresty-en mailing
list instead: https://groups.google.com/group/openresty-en
Regards,
-agentzh
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