Some errors fixed, works for api.js

routes/chartapi.js

@@ -0,0 +1,40 @@
+import express from 'express'
+
+import {getData4map} from "../actions/data4map.js"
+import * as cTable  from "../utilities/commands.js"
+import * as ERR from "../utilities/errortexts.js"
+
+const router = express.Router();
+
+/* GET home page. */
+
+// normal routes called from javascript client
+router.get('/:cmd', async (req, res) => {
+  const cmd = req.params.cmd
+  let table
+  for (let c of cTable.chartcmdTable) {
+    if (c.cmd === cmd) {
+      let erg = await c.func(req.query)
+      if (typeof erg === 'string') {
+        res.type('text')
+        res.send(erg)
+      } else {
+          res.json(erg)
+      }
+      return
+    }
+  }
+  res.json({err: ERR.CMNDUNKOWN})
+})
+
+router.post('/:cmd', async (req, res) => {
+  const cmd = req.params.cmd
+  if (cmd === 'getdata4maps') {
+    const erg = await getData4map(req.body)
+    res.json(erg)
+  } else {
+    res.json({err: ERR.CMNDUNKOWN})
+  }
+})
+
+export default router