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Adding arbitrary express routes

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This commit is contained in:
Daniel Hutzel
2025-02-21 14:37:26 +01:00
parent 413d4de745
commit 6acd5338d9
1 changed files with 31 additions and 11 deletions
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40
bookshop/srv/ord-service.mjs
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@@ -10,10 +10,11 @@ export class OrdService extends cds.ApplicationService {
/** /**
* Just an example to do something with id, if given. * Just an example to do something with id, if given.
* Try it out with URLs like that: * Try it out with URLs like that:
* http://localhost:4004/ord/v1/documents *
* http://localhost:4004/ord/v1/documents/CatalogService * - http://localhost:4004/ord/v1/documents
* http://localhost:4004/ord/v1/documents/CatalogService.Books * - http://localhost:4004/ord/v1/documents/CatalogService
* http://localhost:4004/ord/v1/documents/CatalogService.Authors * - http://localhost:4004/ord/v1/documents/CatalogService.Books
* - http://localhost:4004/ord/v1/documents/CatalogService.Authors
*/ */
this.on('READ','csn', req => { this.on('READ','csn', req => {
let csn = cds.context?.model || cds.model let csn = cds.context?.model || cds.model
@@ -25,16 +26,17 @@ export class OrdService extends cds.ApplicationService {
/** /**
* Just an example to serve arbitrary content with a function. * Just an example to serve arbitrary content with a function.
* Try it out with URLs like that: * Try it out with URLs like that:
* http://localhost:4004/ord/v1/api?service=CatalogService *
* http://localhost:4004/ord/v1/api?service=CatalogService&format=edmx * - http://localhost:4004/ord/v1/api?service=CatalogService
* http://localhost:4004/ord/v1/api?service=CatalogService&format=edmx-v2 * - http://localhost:4004/ord/v1/api?service=CatalogService&format=edmx
* http://localhost:4004/ord/v1/api?service=CatalogService&format=openapi * - http://localhost:4004/ord/v1/api?service=CatalogService&format=edmx-v2
* - http://localhost:4004/ord/v1/api?service=CatalogService&format=openapi
*/ */
this.on('api', req => { this.on('api', req => {
let csn = cds.context?.model || cds.model let csn = cds.context?.model || cds.model
let { service, format } = req.data let { service, format = 'csn' } = req.data
let { res } = req.http let { res } = req.http
if (!format) { if (format === 'csn') {
if (!service) return res.send(csn) if (!service) return res.send(csn)
service = csn.services[service] service = csn.services[service]
return res.send({ definitions: [ service, ...service.entities ] .reduce ((all,e) => { return res.send({ definitions: [ service, ...service.entities ] .reduce ((all,e) => {
@@ -48,6 +50,24 @@ export class OrdService extends cds.ApplicationService {
return res.send(api) return res.send(api)
}) })
/**
* Example how to register arbitrary use the express app routes,
* and map them to our service's interface.
* Try it out with URLs like that:
*
* - http://localhost:4004/ord/v1/csn/CatalogService
* - http://localhost:4004/ord/v1/edmx/CatalogService
* - http://localhost:4004/ord/v1/openapi/CatalogService
* - http://localhost:4004/ord/v1/asyncapi/CatalogService
*
* NOTE: we add cds.middlewares.before to the route, which gives us all
* the context and auth handling, which is also available to CAP services.
*/
cds.app.get (`${this.path}/:api?/:service?`, cds.middlewares.before, req => {
const { api, service } = req.params
return this.api (service, api)
})
return super.init() return super.init()
} }
} }