custom headers of subrequest

tweyseo · 2019-06-18T23:41:26+00:00

Can anyone at all, provide any insight on this?On Tuesday, June 18, 2019 at 1:20:17 PM UTC+4, Wasseem wrote:Hi guys.Assuming my stack has openresty (front se...

custom headers of subrequest

tweyseo

Although original request headers could be ignored by setting proxy_pass_request_headers to off in subrequest locations, but i can only add my own headers in the subrequest by setting proxy_set_header until i used balancer_by_lua* directive. I thought i could add my own headers before set_current_peer,but unfortunately, the setting of proxy_pass_request_headers take effect only after balancer_by_lua* directive.

So is there any other suggestions about adding my own headers in the subrequest that generated via capture ?

piotrprz

You can use ngx.req.set_header in a phase that runs before balancer_by_lua (rewrite, access).

W dniu wtorek, 18 czerwca 2019 17:41:26 UTC+2 użytkownik tweyseo napisał:

Although original request headers could be ignored by setting proxy_pass_request_headers to off in subrequest locations, but i can only add my own headers in the subrequest by setting proxy_set_header until i used balancer_by_lua* directive. I thought i could add my own headers before set_current_peer,but unfortunately, the setting of proxy_pass_request_headers take effect only after balancer_by_lua* directive.
So is there any other suggestions about adding my own headers in the subrequest that generated via capture ?

tweyseo

the subrequest in proxy_pass only have rewrite phase and content phase (which was mutually exclusive with proxy_pass), and rewrite phase was before balancer phase.
在 2019年6月19日星期三 UTC+8上午6:50:10，Piotr Przybylski写道：

You can use ngx.req.set_header in a phase that runs before balancer_by_lua (rewrite, access).

W dniu wtorek, 18 czerwca 2019 17:41:26 UTC+2 użytkownik tweyseo napisał:
Although original request headers could be ignored by setting proxy_pass_request_headers to off in subrequest locations, but i can only add my own headers in the subrequest by setting proxy_set_header until i used balancer_by_lua* directive. I thought i could add my own headers before set_current_peer,but unfortunately, the setting of proxy_pass_request_headers take effect only after balancer_by_lua* directive.
So is there any other suggestions about adding my own headers in the subrequest that generated via capture ?

juzipeek

when you use `capture`, you can add header in subrequest.

At 2019-06-18 23:41:26, "tweyseo" <twe...@gmail.com> wrote:

Although original request headers could be ignored by setting proxy_pass_request_headers to off in subrequest locations, but i can only add my own headers in the subrequest by setting proxy_set_header until i used balancer_by_lua* directive. I thought i could add my own headers before set_current_peer,but unfortunately, the setting of proxy_pass_request_headers take effect only after balancer_by_lua* directive.
So is there any other suggestions about adding my own headers in the subrequest that generated via capture ?

.

tweyseo

i don't want inherit headers from original request and use new headers in subrequest.

在 2019年6月19日星期三 UTC+8下午2:59:59，juzi写道：

when you use `capture`, you can add header in subrequest.

At 2019-06-18 23:41:26, "tweyseo" <twe...@gmail.com> wrote:

Although original request headers could be ignored by setting proxy_pass_request_headers to off in subrequest locations, but i can only add my own headers in the subrequest by setting proxy_set_header until i used balancer_by_lua* directive. I thought i could add my own headers before set_current_peer,but unfortunately, the setting of proxy_pass_request_headers take effect only after balancer_by_lua* directive.
So is there any other suggestions about adding my own headers in the subrequest that generated via capture ?

.

juzipeek

save parent request's headers before do subrequest, after subrequest done recover the heades use saved headers. like this:

```lua

local old_headers = ngx.req.get_headers()
for k,v in pairs(old_headers) do
ngx.req.clear_header(k)
end

ngx.req.set_header("new_header", "added_header")

local resp = ngx.location.capture_multi({
{"/xxx", method=ngx.HTTP_GET}
})

for k,v in pairs(old_headers) do
ngx.req.set_header(k, v)
end
```

At 2019-06-19 15:15:06, "tweyseo" <twe...@gmail.com> wrote:

i don't want inherit headers from original request and use new headers in subrequest.

在 2019年6月19日星期三 UTC+8下午2:59:59，juzi写道：
when you use `capture`, you can add header in subrequest.

At 2019-06-18 23:41:26, "tweyseo" <twe...@gmail.com> wrote:

Although original request headers could be ignored by setting proxy_pass_request_headers to off in subrequest locations, but i can only add my own headers in the subrequest by setting proxy_set_header until i used balancer_by_lua* directive. I thought i could add my own headers before set_current_peer,but unfortunately, the setting of proxy_pass_request_headers take effect only after balancer_by_lua* directive.
So is there any other suggestions about adding my own headers in the subrequest that generated via capture ?

.

tweyseo

I've done this before, but the thing is this solution relies heavily on business logic （the time to recover the origin headers）

在 2019年6月19日星期三 UTC+8下午5:17:13，juzi写道：
save parent request's headers before do subrequest, after subrequest done recover the heades use saved headers. like this:

```lua

local old_headers = ngx.req.get_headers()
for k,v in pairs(old_headers) do
ngx.req.clear_header(k)
end

ngx.req.set_header("new_header", "added_header")

local resp = ngx.location.capture_multi({
{"/xxx", method=ngx.HTTP_GET}
})

for k,v in pairs(old_headers) do
ngx.req.set_header(k, v)
end
```

At 2019-06-19 15:15:06, "tweyseo" <twe...@gmail.com> wrote:

i don't want inherit headers from original request and use new headers in subrequest.

在 2019年6月19日星期三 UTC+8下午2:59:59，juzi写道：
when you use `capture`, you can add header in subrequest.

At 2019-06-18 23:41:26, "tweyseo" <twe...@gmail.com> wrote:

Although original request headers could be ignored by setting proxy_pass_request_headers to off in subrequest locations, but i can only add my own headers in the subrequest by setting proxy_set_header until i used balancer_by_lua* directive. I thought i could add my own headers before set_current_peer,but unfortunately, the setting of proxy_pass_request_headers take effect only after balancer_by_lua* directive.
So is there any other suggestions about adding my own headers in the subrequest that generated via capture ?

.