How would I have a parameterized route with an extension at the end?

[marr]

I am trying to handle a route that would include a file extension as well as multiple parameters. The example request url might look like /tile/1/2/3.mvt -- I can't figure out the correct route definition. I tried '/tile/:z/:y/:x{.+\\.mvt$}' as that is the closest thing in the documentation I could find. The parameters don't match up. Please help.

[simonsankar]

This is the best I could do using @marr answer (Im using Hono with OpenAPI)
But you could use zod to transform the value in your handler like normal as well

const getLocationsTiles = createRoute({
  tags: ['locations'],
  method: 'get',
  path: '/{z}/{x}/{y}{.+\\.mvt$}', // <---- that at least gets you to something like '1234.mvt'
  request: {
    params: z.object({
      z: z
        .string()
        .transform((val) => parseInt(val, 10))
        .pipe(z.number().int().min(0))
        .describe('Zoom level'),
      x: z
        .string()
        .transform((val) => parseInt(val, 10))
        .pipe(z.number().int().min(0))
        .describe('X coordinate of the tile'),
      y: z
        .string()
        .transform((val) => { // <-------- Here just extract the number
          // Extract the number by removing the .mvt extension
          const numStr = val.split('.')[0];
          return parseInt(numStr, 10);
        })
        .pipe(z.number().int().min(0))
        .describe('Y coordinate of the tile'),
    }),
    query: z.object({
      density: z
        .enum(['low', 'medium', 'high'])
        .optional()
        .describe('Density of the tile'),
    }),
  },
  responses: {
    200: {
      content: {
        'application/x-protobuf': {
          schema:
            locationsRepository.tiles.getLocationsTiles.outputSchema.openapi({
              example: Buffer.from('I am a buffer'),
            }),
        },
      },
      description: locationsRepository.tiles.getLocationsTiles.description,
    },
  },
})