NJS - API Calls

[naidile.pn]

Thanks a lot! It's working. I had underscore in header which was causing
unexpected behavior as such headers get ignored.


On Tue, Jun 4, 2019 at 6:25 PM Dmitry Volyntsev <xeioex at nginx.com> wrote:

>
>
> On 04.06.2019 14:00, naidile.pn wrote:
> > What does api write=on; mean ? Could you please explain.
> >
>
>
> api is a plus-only nginx module
> (http://nginx.org/en/docs/http/ngx_http_api_module.html).
>
> You do not need this to make subrequests.
>
>
> > On Tue, Jun 4, 2019 at 4:26 PM naidile.pn <http://naidile.pn>
> > <naidilepn at gmail.com <mailto:naidilepn at gmail.com>> wrote:
> >
> >     Hi Dmitry,
> >
> >     I tried subrequest. But it doesn't work. Nginx is trying find the
> >     API within /var/www/html folder.
>
>
> Can you elaborate more what are you trying to do?
>
> See the config below as an example:
>
> -----------------
> http {
>      js_include proxy.js;
>      js_set $summary summary;
>      js_set $prop prop;
>
>      # proxy server
>
>      server {
>          listen       8080;
>          server_name  localhost;
>
>          location / {
>              js_content proxy;
>          }
>
>          location = /_prop {
>              internal;
>              proxy_pass http://127.0.0.1:8090;
>          }
>
>          location = /_proxy {
>              internal;
>              proxy_set_header Prop $prop;
>              proxy_pass http://127.0.0.1:8070$request_uri;
>          }
>      }
>
>      # prop server
>
>      server {
>          listen       8090;
>
>          location / {
>              return 200 '{"prop": "WAKA"}';
>          }
>      }
>
>      # dest server
>
>      server {
>          listen       8070;
>
>          location / {
>              return 200 $summary;
>          }
>      }
> }
>
> -----------------
> function proxy(r) {
>         r.subrequest("/_prop", reply => {
>                 if (reply.status != 200) {
>                         r.return(500);
>                         return;
>                 }
>
>                 r.variables.prop = JSON.parse(reply.responseBody).prop;
>                 r.subrequest("/_proxy", res => {
>                         r.return(res.status != 200 ? 500 : 200,
>                                          res.responseBody);
>                 })
>         });
> }
>
> function summary(r) {
>         var s = "JS summary\n\n";
>
>      s += "Method: " + r.method + "\n";
>      s += "HTTP version: " + r.httpVersion + "\n";
>      s += "Host: " + r.headersIn.host + "\n";
>      s += "Remote Address: " + r.remoteAddress + "\n";
>      s += "URI: " + r.uri + "\n";
>
>      s += "Headers:\n";
>
>      for (var h in r.headersIn) {
>          s += "  header '" + h + "' is '" + r.headersIn[h] + "'\n";
>      }
>
>         return s;
> }
>
> var prop = (r) => r.variables.prop;
> -----------------
> curl http://127.0.0.1:8080/test
> JS summary
>
> Method: GET
> HTTP version: 1.0
> Host: 127.0.0.1:8070
> Remote Address: 127.0.0.1
> URI: /test
> Headers:
>   header 'Prop' is 'WAKA'
>   header 'Host' is '127.0.0.1:8070'
>   header 'Connection' is 'close'
>   header 'User-Agent' is 'curl/7.64.0'
>   header 'Accept' is '*/*'
>
> -----------------
>
> >
> >     And, with proxy_pass within subrequest, I'm not able to pass the
> >     request headers and body. Kindly help here.
>
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