feat: deduce base url from hosted location [LIBS-580]

adapter/src/components/ServerVersionProvider.js

@@ -3,6 +3,7 @@ import { getBaseUrlByAppName, setBaseUrlByAppName } from '@dhis2/pwa'
 import PropTypes from 'prop-types'
 import React, { useEffect, useState } from 'react'
 import { get } from '../utils/api.js'
+import { getBaseUrl } from '../utils/getBaseUrl.js'
 import { parseDHIS2ServerVersion, parseVersion } from '../utils/parseVersion.js'
 import { LoadingMask } from './LoadingMask.js'
 import { LoginModal } from './LoginModal.js'
@@ -150,13 +151,15 @@ export const ServerVersionProvider = ({
 
  const serverVersion = parseDHIS2ServerVersion(systemInfo.version)
  const realApiVersion = serverVersion.minor
+ // ultimately, use an absolute URL based on hosted location
+ const finalBaseUrl = getBaseUrl(baseUrl)
 
  return (
  <Provider
  config={{
  appName,
  appVersion: parseVersion(appVersion),
- baseUrl,
+ baseUrl: finalBaseUrl,
  apiVersion: apiVersion || realApiVersion,
  serverVersion,
  systemInfo,

adapter/src/utils/getBaseUrl.js

@@ -0,0 +1,47 @@
+const isUrlAbsolute = (url) => {
+ // the URL constructor will throw for relative URLs
+ try {
+ new URL(url)
+ return true
+ } catch {
+ return false
+ }
+}
+
+/**
+ * Deduces the base URL for the DHIS2 instance from the location at which this
+ * app is hosted. Returns an absolute URL
+ * @param {string} defaultBaseUrl a fallback URL that will be used if the base
+ * URL can't be deduced from the window location
+ * @returns {string} an absolute base URL for the DHIS2 instance
+ */
+export const getBaseUrl = (defaultBaseUrl) => {
+ // if defaultBaseUrl is absolute, use that
+ if (isUrlAbsolute(defaultBaseUrl)) {
+ return defaultBaseUrl
+ }
+
+ const { location } = window
+ const path = location.pathname
+
+ // get penultimate 3 path elements (don't need anything before),
+ // e.g. /dev/api/apps/app-name/index.html => ['api', 'apps', 'app-name'].
+ const splitPath = path.split('/').slice(-4, -1)
+ // could be shorter than 3 elements for e.g. /dhis-web-maps/
+ const l = splitPath.length
+
+ // test for core apps
+ if (/dhis-web-.+/.test(splitPath[l - 1])) {
+ return new URL('..', location.href).href
+ }
+
+ // test for custom apps
+ if (splitPath[l - 3] === 'api' && splitPath[l - 2] === 'apps') {
+ return new URL('../../..', location.href).href
+ }
+
+ // todo: handle path for global shell
+
+ // otherwise, return absolute version of default
+ return new URL(defaultBaseUrl, location.href).href
+}

adapter/src/utils/getBaseUrl.test.js

@@ -0,0 +1,63 @@
+import { getBaseUrl } from './getBaseUrl.js'
+
+const testOrigin = 'https://debug.dhis2.org'
+// { [testPath]: expectedPath }
+const testPaths = {
+ '/dev/api/apps/simple-app/index.html': '/dev/',
+ '/analytics_dev/dhis-web-maps/plugin.html': '/analytics_dev/',
+ '/dhis-web-line-listing/index.html': '/',
+ '/dhis-web-user-settings/': '/',
+ '/hmis/staging/v41/api/apps/WHO-Data-Quality-App/app.html':
+ '/hmis/staging/v41/',
+ // this is a strange base URL, but it should be considered as a core app
+ '/api/apps/dhis-web-maps/': '/api/apps/',
+}
+
+const windowLocationMock = jest
+ .spyOn(window, 'location', 'get')
+ .mockImplementation(() => ({
+ href: 'https://debug.dhis2.org/dev/',
+ pathname: '/dev/',
+ }))
+
+afterEach(() => {
+ jest.clearAllMocks()
+})
+
+test('an absolute URL is used if provided as the default', () => {
+ const testBaseUrl = 'http://localhost:8080/hmis/long/path/dev'
+
+ const url = getBaseUrl(testBaseUrl)
+
+ expect(url).toBe(testBaseUrl)
+})
+
+describe('location variants', () => {
+ const defaultRelativeBaseUrl = '..'
+
+ for (const [testPath, expectedPath] of Object.entries(testPaths)) {
+ test(testPath, () => {
+ windowLocationMock.mockImplementation(() => ({
+ pathname: testPath,
+ href: testOrigin + testPath,
+ }))
+
+ const url = getBaseUrl(defaultRelativeBaseUrl)
+
+ expect(url).toBe(testOrigin + expectedPath)
+ })
+ }
+})
+
+test("if the function doesn't match a pattern, it falls back to the provided default", () => {
+ const relativeDefaultBaseUrl = '../../..'
+ const testPath = '/not/a/recognized/path/index.html'
+ windowLocationMock.mockImplementation(() => ({
+ pathname: testPath,
+ href: testOrigin + testPath,
+ }))
+
+ const url = getBaseUrl(relativeDefaultBaseUrl)
+
+ expect(url).toBe(testOrigin + '/not/')
+})