Rewrite response body

eddnerd · 2018-04-10T01:36:13+00:00

I'm trying to call an nginx directive that sets a single variable but accepts multiple parameters. Ex https://github.com/openresty/set-misc-nginx-module#...

Rewrite response body

eddnerd

Hi,

I am new to openresty and am trying to replace the body the comes from an earlier call to proxy_pass with code like this:

body_filter_by_lua_block {
ngx.arg[1] = '{"count"' .. ":2}'
ngx.arg[2] = true
}

I had originally, not had the line for `ngx.arg[2] = true`, but I would get back the body twice (does that mean the body I'm replacing has 2 chunks?). I added in the `ngx.arg[2] = true` line and now the output from the request looks good. When I deploy the `nginx` file, the service looks good for a few requests then the `nginx` requests start to hang. Is the correct/best practice for replacing the response body? What should I do instead?

Thanks,

Jake

qleex001

May be you should remove the Content-Length in response headers

在 2018年4月10日星期二 UTC+8上午1:36:13，Jake Pearson写道：

Hi,
I am new to openresty and am trying to replace the body the comes from an earlier call to proxy_pass with code like this:

body_filter_by_lua_block {
ngx.arg[1] = '{"count"' .. ":2}'
ngx.arg[2] = true
}
I had originally, not had the line for `ngx.arg[2] = true`, but I would get back the body twice (does that mean the body I'm replacing has 2 chunks?). I added in the `ngx.arg[2] = true` line and now the output from the request looks good. When I deploy the `nginx` file, the service looks good for a few requests then the `nginx` requests start to hang. Is the correct/best practice for replacing the response body? What should I do instead?

Thanks,
Jake

zchao1995

Hello!

The document already marked:

When the Lua code may change the length of the response body, then it is required to always clear out the Content-Length response header (if any) in a header filter to enforce streaming output

eddnerd

That took care of the problem. Thanks!

On Monday, April 9, 2018 at 7:50:10 PM UTC-6, tokers wrote:

Hello!

The document already marked:

When the Lua code may change the length of the response body, then it is required to always clear out the Content-Length response header (if any) in a header filter to enforce streaming output