Mapped mode + remote isn't working, what's wrong with the config?

[leshik]

Video files are served by Minio at http://127.0.0.1:9000/media.
For the sake of this test, /json/mapped/hls/test.json returns static json:

vod_upstream_location /json;
vod_remote_upstream_location /media;

server {
    listen 80;
    server_name _;

    location /json/mapped/hls/test.json {
        default_type application/json;
        return 200 '{"sequences":[{"clips":[{"type":"source","path":"http://127.0.0.1:9000/media/IMG_8707.mp4"}]}]}';
    }

    location ~ /media/[^/]+/(.*) {
        internal;
        proxy_pass http://127.0.0.1:9000/media/$1;
    }

    location /hls/ {
        vod hls;
        vod_mode remote;

        include /etc/nginx/segments.conf;
        include /etc/nginx/cors.conf;
    }

    location /mapped/hls/ {
        vod hls;
        vod_mode mapped;

        include /etc/nginx/segments.conf;
        include /etc/nginx/cors.conf;
    }
}

Now, the simple remote mode works fine:

$ curl http://localhost/hls/IMG_8707.mp4/index.m3u8
#EXTM3U
#EXT-X-TARGETDURATION:10
#EXT-X-ALLOW-CACHE:YES
#EXT-X-PLAYLIST-TYPE:VOD
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:1
#EXTINF:2.000,
http://localhost/hls/IMG_8707.mp4/seg-1-v1-a1.ts
#EXTINF:2.000,
http://localhost/hls/IMG_8707.mp4/seg-2-v1-a1.ts
#EXTINF:2.000,
http://localhost/hls/IMG_8707.mp4/seg-3-v1-a1.ts
#EXTINF:4.000,
http://localhost/hls/IMG_8707.mp4/seg-4-v1-a1.ts
#EXTINF:10.000,
http://localhost/hls/IMG_8707.mp4/seg-5-v1-a1.ts
#EXTINF:10.000,
http://localhost/hls/IMG_8707.mp4/seg-6-v1-a1.ts
#EXTINF:10.000,
http://localhost/hls/IMG_8707.mp4/seg-7-v1-a1.ts
#EXTINF:8.885,
http://localhost/hls/IMG_8707.mp4/seg-8-v1-a1.ts
#EXT-X-ENDLIST

But the mapped mode isn't:

curl http://localhost/mapped/hls/test.json/index.m3u8 results in 503, error.log is:

2024/10/21 17:23:54 [warn] 7#7: *5 ngx_child_request_initial_wev_handler: upstream is null, client: 192.168.97.1, server: _, request: "GET /mapped/hls/test.json/index.m3u8 HTTP/1.1", subrequest: "/json/mapped/hls/test.json", host: "localhost"
2024/10/21 17:23:54 [error] 7#7: *5 ngx_http_vod_map_run_step: not enough room in buffer for null terminator, client: 192.168.97.1, server: _, request: "GET /mapped/hls/test.json/index.m3u8 HTTP/1.1", host: "localhost"

JSON file is there:

$ curl http://localhost/json/mapped/hls/test.json
{"sequences":[{"clips":[{"type":"source","path":"http://127.0.0.1:9000/media/IMG_8707.mp4"}]}]}

What's wrong?

[navarro967]

@leshik Looks like it may be related to this:
#1546

The vod_upstream_location must point to a location that uses an upstream.

[leshik]

@navarro967 thanks, changed that, but now another error, and it's trying to make some weird subrequest:

2024/10/25 15:33:37 [warn] 7#7: *1 ngx_child_request_initial_wev_handler: upstream is null, client: 192.168.97.1, server: _, request: "GET /mapped/hls/test.json/index.m3u8 HTTP/1.1", subrequest: "/mediahttp://127.0.0.1:9000/media/IMG_8707.mp4", host: "localhost"
2024/10/25 15:33:37 [error] 7#7: *1 ngx_child_request_wev_handler: unexpected, output buffer is null, client: 192.168.97.1, server: _, request: "GET /mapped/hls/test.json/index.m3u8 HTTP/1.1", host: "localhost"

[navarro967]

@leshik Could you show the current config and a response from the current json endpoint?

[leshik]

@navarro967

vod_upstream_location /json;
vod_remote_upstream_location /media;

server {
    listen 8080;
    server_name _;

    location /json/mapped/hls/test.json {
        proxy_pass http://localhost;
        proxy_redirect off;
    }

    location ~ /media/[^/]+/(.*) {
        internal;
        proxy_pass http://127.0.0.1:9000/media/$1;
    }

    location /hls/ {
        vod hls;
        vod_mode remote;

        include /etc/nginx/segments.conf;
        include /etc/nginx/cors.conf;
    }

    location /mapped/hls/ {
        vod hls;
        vod_mode mapped;

        include /etc/nginx/segments.conf;
        include /etc/nginx/cors.conf;
    }
}

$ curl http://localhost/json/mapped/hls/test.json
{"sequences":[{"clips":[{"type":"source","path":"http://127.0.0.1:9000/media/IMG_8707.mp4"}]}]}