feat: add api server (#74)

Mainly two purposes:

1. Provide https://api.badgen.net
2. Serve this api behind Now CDN as a cache layer

libs/index-api.md

@@ -0,0 +1,6 @@
+# api.badgen.net
+
+## Examples
+
+- https://api.badgen.net/npm/v/micro
+- https://api.badgen.net/npm/dependents/got

libs/live-fetcher.js

@@ -1,26 +1,6 @@
-const { get } = require('micro-fork')
-const liveFns = require('./live-fns/_index.js')
-const serveBadge = require('./serve-badge.js')
 const waitings = {} // Cache ongoing fetching, prevent redundant request
 
-module.exports = Object.entries(liveFns).map(([name, fn]) => {
-  return get(`/${name}/*`, async (req, res) => {
-    const style = req.headers.host === 'flat.badgen.net' ? 'flat' : undefined
-    const {
-      subject = name,
-      status = 'unknown',
-      color = 'grey',
-      failed = false
-    } = await fetchLiveParams(name, fn, req.params['*'])
-
-    req.params = { subject, status, color, style }
-    serveBadge(req, res, {
-      maxAge: failed ? '0' : (Math.random() * 60 + 60).toFixed()
-    })
-  })
-})
-
-async function fetchLiveParams (scope, fn, paramsPath) {
+module.exports = async function fetchLiveParams (scope, fn, paramsPath) {
   const fetchKey = `#${scope} ${paramsPath}`
   if (waitings[fetchKey]) return waitings[fetchKey]
 

libs/live-handlers.js

@@ -0,0 +1,27 @@
+const axios = require('./axios.js')
+const { get } = require('micro-fork')
+const liveFns = require('./live-fns/_index.js')
+const serveBadge = require('./serve-badge.js')
+const liveFetcher = require('./live-fetcher.js')
+
+const { API_HOST } = process.env
+
+module.exports = Object.entries(liveFns).map(([name, fn]) => {
+  return get(`/${name}/*`, async (req, res) => {
+    const {
+      subject = name,
+      status = 'unknown',
+      color = 'grey',
+      failed = false
+    } = await (API_HOST
+      ? axios(API_HOST + req.url).then(res => res.data)
+      : liveFetcher(name, fn, req.params['*'])
+    )
+
+    const style = req.headers.host === 'flat.badgen.net' ? 'flat' : undefined
+    req.params = { subject, status, color, style }
+    serveBadge(req, res, {
+      maxAge: failed ? '0' : (Math.random() * 60 + 60).toFixed()
+    })
+  })
+})

libs/serve-api.js

@@ -0,0 +1,26 @@
+const fs = require('fs')
+const path = require('path')
+const { send } = require('micro')
+const { router, get } = require('micro-fork')
+const liveFunctions = require('./live-fns/_index.js')
+const liveFetcher = require('./live-fetcher.js')
+
+const CACHE_CONTROL = `public, max-age=60, stale-while-revalidate=86400, stale-if-error=86400`
+const sMaxAges = {
+  'github': '240'
+}
+
+const apiHandlers = Object.entries(liveFunctions).map(([name, fn]) => {
+  return get(`/${name}/*`, async (req, res) => {
+    res.setHeader('Cache-Control', `${CACHE_CONTROL}, s-maxage=${sMaxAges[name] || '120'}`)
+    send(res, 200, await liveFetcher(name, fn, req.params['*']))
+  })
+})
+
+const indexContent = fs.readFileSync(path.join(__dirname, 'index-api.md'), 'utf8')
+const serveIndex = (req, res) => send(res, 200, indexContent)
+
+module.exports = router()(
+  get('/', serveIndex),
+  ...apiHandlers
+)

now.json

@@ -2,9 +2,9 @@
   "alias": [
     "badgen",
     "badgen.net",
-    "flat.badgen.net"
+    "flat.badgen.net",
+    "api.badgen.net"
   ],
-  "public": true,
   "files": [
     "package-lock.json",
     "service.js",

package.json

@@ -9,11 +9,11 @@
     "dev": "micro-dev service.js -s",
     "pretest": "npm run lint",
     "test": "tap test/*.js --reporter spec -j12",
-    "start": "micro service.js",
+    "start": "node service.js",
     "precanary": "now alias rm badgen-canary -y -T amio",
     "canary": "now -T amio && now alias badgen-canary -T amio",
     "predeploy": "now rm badgen-service --safe -y -T amio || true",
-    "deploy": "now -T amio && now alias -T amio"
+    "deploy": "now -T amio -e API_HOST='https://api.badgen.net'"
   },
   "dependencies": {
     "axios": "^0.18.0",

service.js

@@ -5,9 +5,10 @@ const serveIndex = require('./libs/serve-index.js')
 const serve404 = require('./libs/serve-404.js')
 const serveDocs = require('./libs/serve-docs.js')
 const serveBadge = require('./libs/serve-badge.js')
-const liveBadgeHandlers = require('./libs/live-badge-handlers.js')
+const liveHandlers = require('./libs/live-handlers.js')
+const serveApi = require('./libs/serve-api.js')
 
-module.exports = router()(
+const main = router()(
   get('/*', serve404),
   get('/', serveIndex),
   get('/docs/:topic', serveDocs),
@@ -15,9 +16,19 @@ module.exports = router()(
   get('/favicon.svg', serveFavicon),
   get('/badge/:subject/:status', (req, res) => serveBadge(req, res)),
   get('/badge/:subject/:status/:color', (req, res) => serveBadge(req, res)),
-  ...liveBadgeHandlers
+  ...liveHandlers
 )
 
+module.exports = function (req, res) {
+  switch (req.headers.host) {
+    case 'api.badgen.net':
+    case '127.0.0.1:3000':
+      return serveApi(req, res)
+    default:
+      return main(req, res)
+  }
+}
+
 if (require.main === module) {
   micro(module.exports).listen(3000)
 }