Create and deploy simple openscad api

.gitignore

@@ -8,5 +8,7 @@ dist
 dist-babel
 node_modules
 yarn-error.log
-web/public/mockServiceWorker.js
-web/public/CADWorker/*
+
+# serverless related ignores, see api/src/docker/openscad/Dockerfile for aws-lambda-rie info
+.serverless
+aws-lambda-rie

api/src/docker/README.md

@@ -0,0 +1,22 @@
+# Serverless
+
+We're using the serverless from work for deployment
+
+```
+sls deploy
+```
+But Kurt Hutten credentials for deployment, though if you wanted to set your own account you could deploy to that if you wanted to test.
+
+## testing changes locally
+
+Honestly it's a pain in the neck, for a number of reasons.
+
+You'll need to have Docker installed
+
+Because of the way the docker containers to be deployed as lambdas on aws are somewhat specialised for the purpose we're using `docker-compose` to spin one up for each function/endpoint. But more work needs to be done to get this to work with the app locally.
+
+```bash
+docker-compose up --build
+```
+The first time you run the, when it has to build the main image it will take some time, but launching again will be quicker.
+

api/src/docker/docker-compose.yml

@@ -0,0 +1,20 @@
+services:
+  openscad-health:
+    build: ./openscad/.
+    image: openscad
+    command: openscad.health
+    ports:
+      - "5051:8080"
+  openscad-render:
+    image: openscad
+    # build: ./openscad/.
+    command: openscad.render
+    ports:
+      - "5052:8080"
+  openscad-export:
+    image: openscad
+    # build: ./openscad/.
+    command: openscad.exportstl
+    ports:
+      - "5053:8080"
+

api/src/docker/openscad/Dockerfile

@@ -0,0 +1,44 @@
+FROM public.ecr.aws/lts/ubuntu:20.04_stable
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+## install things needed to run openscad (xvfb is an important one)
+RUN apt-get update -qq
+# double check this below, I'm not sure we need inkscape etc
+RUN apt-get -y -qq install software-properties-common dirmngr apt-transport-https lsb-release ca-certificates xvfb imagemagick unzip inkscape
+RUN apt-get update -qq
+RUN apt-get install -y -qq openscad
+RUN apt-get install -y curl
+
+# install node 14, (maybe I should put the .sh file into version control?)
+RUN curl -sL https://deb.nodesource.com/setup_14.x -o nodesource_setup.sh
+RUN bash nodesource_setup.sh
+RUN apt-get install -y nodejs
+
+# Install aws-lambda-cpp build dependencies, this is for the post install script in aws-lambda-ric (in package.json)
+RUN apt-get update && \
+    apt-get install -y \
+    g++ \
+    make \
+    cmake \
+    unzip \
+    automake autoconf libtool \
+    libcurl4-openssl-dev
+
+# Add the lambda emulator for local dev, (see entrypoint.sh for where it's used),
+# I have the file locally (gitignored) to speed up build times (as it downloads everytime),
+# but you can use the http version of the below ADD command or download it yourself from that url.
+ADD aws-lambda-rie /usr/local/bin/aws-lambda-rie
+# ADD https://github.com/aws/aws-lambda-runtime-interface-emulator/releases/download/v1.0/aws-lambda-rie /usr/local/bin/aws-lambda-rie
+RUN ["chmod", "+x", "/usr/local/bin/aws-lambda-rie"]
+
+WORKDIR /var/task/
+COPY package*.json /var/task/
+RUN npm install
+
+COPY *.js /var/task/
+COPY entrypoint.sh /entrypoint.sh
+RUN ["chmod", "+x", "/entrypoint.sh"]
+
+ENTRYPOINT ["sh", "/entrypoint.sh"]
+CMD [ "openscad.render" ]

api/src/docker/openscad/entrypoint.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+if [ -z "${AWS_LAMBDA_RUNTIME_API}" ]; then
+  /usr/local/bin/aws-lambda-rie /usr/bin/npx aws-lambda-ric $1
+else
+  /usr/bin/npx aws-lambda-ric $1
+fi

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,
+}