Create and deploy simple openscad api

A minimal frontend integration has been added to as a POC resolves #219 and #222
2021-02-25 20:28:59 +11:00
parent 8493838f0c
commit 63c2a79a5d
15 changed files with 1848 additions and 44 deletions
--- a/api/src/docker/openscad/openscad.js
+++ b/api/src/docker/openscad/openscad.js
@@ -0,0 +1,95 @@
+const { runScad, stlExport } = require('./runScad')
+const middy = require('middy')
+const { cors } = require('middy/middlewares')
+
+const health = async () => {
+  console.log('Health endpoint')
+  return {
+    statusCode: 200,
+    body: 'ok',
+  }
+}
+
+// cors true does not seem to work in serverless.yml, perhaps docker lambdas aren't covered by that config
+// special lambda just for responding to options requests
+const preflightOptions = (req, _context, callback) => {
+  const response = {
+    statusCode: 204,
+    headers: {
+      'Access-Control-Allow-Origin': '*',
+      'Access-Control-Allow-Methods': 'POST',
+      'Access-Control-Allow-Headers': '*',
+    },
+  }
+  callback(null, response)
+}
+
+const render = async (req, _context, callback) => {
+  _context.callbackWaitsForEmptyEventLoop = false
+  const eventBody = Buffer.from(req.body, 'base64').toString('ascii')
+  console.log(eventBody, 'eventBody')
+  const { file, settings } = JSON.parse(eventBody)
+  const { error, result, tempFile } = await runScad({ file, settings })
+  if (error) {
+    const response = {
+      statusCode: 400,
+      body: JSON.stringify({ error, tempFile }),
+    }
+    callback(null, response)
+  } else {
+    console.log(`got result in route: ${result}, file is: ${tempFile}`)
+    const fs = require('fs')
+    const image = fs.readFileSync(`/tmp/${tempFile}/output.png`, {
+      encoding: 'base64',
+    })
+    console.log(image, 'encoded image')
+    const response = {
+      statusCode: 200,
+      headers: {
+        'content-type': 'image/png',
+      },
+      body: image,
+      isBase64Encoded: true,
+    }
+    callback(null, response)
+  }
+}
+
+const exportstl = async (req, _context, callback) => {
+  _context.callbackWaitsForEmptyEventLoop = false
+  const eventBody = Buffer.from(req.body, 'base64').toString('ascii')
+  console.log(eventBody, 'eventBody')
+  const { file } = JSON.parse(eventBody)
+  const { error, result, tempFile } = await stlExport({ file })
+  if (error) {
+    const response = {
+      statusCode: 400,
+      body: { error, tempFile },
+    }
+    callback(null, response)
+  } else {
+    console.log(`got result in route: ${result}, file is: ${tempFile}`)
+    const fs = require('fs')
+    const stl = fs.readFileSync(`/tmp/${tempFile}/output.stl`, {
+      encoding: 'base64',
+    })
+    console.log('encoded stl', stl)
+    const response = {
+      statusCode: 200,
+      headers: {
+        'content-type': 'application/stl',
+      },
+      body: stl,
+      isBase64Encoded: true,
+    }
+    console.log('callback fired')
+    callback(null, response)
+  }
+}
+
+module.exports = {
+  health: middy(health).use(cors()),
+  exportstl: middy(exportstl).use(cors()),
+  render: middy(render).use(cors()),
+  preflightOptions,
+}