vu app not taking uri_prefix into account (was uri_prefix not working on versions > 0.13.0)

[JackMcKew]

I've been recently trying to upgrade from version 0.13.0 to 0.16.0. My use case depends on the uri_prefix because I'm using a proxy via an ingress in Kubernetes.

My config looks like

[webserver]
port = ":80"
uri_prefix = "/public/map-tile-server-tegola"

[cache]
type = "s3"
bucket = "map-tiles-cache"
basepath = "staging"
region = "ap-southeast-2"
aws_access_key_id = "${AWS_S3_MAP_TILES_CACHE_USER_ACCESS_KEY_ID}"
aws_secret_access_key = "${AWS_S3_MAP_TILES_CACHE_USER_SECRET_ACCESS_KEY}"

[[providers]]
name = "map_tiles"
type = "mvt_postgis"
uri = "postgresql://${AWS_AURORA_MAP_TILES_DB_USERNAME}:${AWS_AURORA_MAP_TILES_DB_PASSWORD}@${AWS_AURORA_MAP_TILES_DB_HOST}:${AWS_AURORA_MAP_TILES_DB_PORT}/${AWS_AURORA_MAP_TILES_DB_DATABASE}?default_transaction_read_only=false&pool_max_conn_idle_time=5"
srid = 4_326

    [[providers.layers]]
      name = "activity-heatmap"
      geometry_fieldname = "geom"
      id_fieldname = "ogc_fid"
      sql = "SELECT ogc_fid, url, texttodisplay, icontoshow, count, ST_AsMVTGeom(ST_Multi(wkb_geometry),!BBOX!) AS geom FROM map_tiles.source_layers WHERE \"layer\" = 'activity_heatmap' AND wkb_geometry && !BBOX!"

[[maps]]
name = "map_tiles"

  [[maps.layers]]
  provider_layer = "map_tiles.activity-heatmap"
  min_zoom = 11
  max_zoom = 11

When I spin this up locally using the following Dockerfile:

FROM gospatial/tegola:v0.13.0 as builder
EXPOSE 80

COPY file-store/tegola-config /opt/tegola_config

CMD ["serve", "--config=/opt/tegola_config/config.toml"]

On versions 0.13.0+, I can reach localhost/public/map-tile-server-tegola/capabilities, the json returns as expected. However, if I head to localhost/public/map-tile-server-tegola, all I see is 404 responses.

On version 0.13.0, this shows the viewer as expected.

Let me know if you can't reproduce this issue

[iwpnd]

Hey! Any chance this is because of that botched SRID in the provider config?

[JackMcKew]

Hey 👋

The underscores in the SRID don't make a difference

https://toml.io/en/v1.0.0

[iwpnd]

The underscores in the SRID don't make a difference

today I learned it also is supported in toml

Let me go ahead and try to reproduce the issue

update:

yup, reproducible. However, this "only" affects the viewer. Tiles are served correctly at:

http://localhost:8080/public/map-tile-server-tegola/maps/map_tiles/{z}/{x}/{y}.pbf

I don't really see why this would happen, as the viewer endpoints are attached to the same group as all the other endpoints.

[JackMcKew]

Ah awesome, at least the tiles are still being served correctly, was throwing me down all sorts of rabbit holes

I'll leave this issue open as it definitely affected me

[ARolek]

@iwpnd did you find the root cause of this issue? I will need to look through the commit log to figure out when this change occurred.

[iwpnd]

i did not go down the rabbithole just yet, nope

update: while you can point the http.FS of the built viewer to whatever uri_prefix you like, the vuejs app itself is using / as apiRoot. So when the app is starting and trying to collect information from /capabilities although your capabilities are at /my_prefix/capabilities, the catch statement is printing the resulting 404. So I think this is an issue with the vuejs app, rather than tegola server.