merge files from the blockchain infra repo (#59)

code/protocol_demos/short-polling/index.js

@@ -0,0 +1,24 @@
+const app = require("express")();
+const jobs = {}
+
+app.post("/submit", (req, res) =>  {
+    const jobId = `job:${Date.now()}`
+    jobs[jobId] = 0;
+    updateJob(jobId,0); 
+    res.end("\n\n" + jobId + "\n\n");
+})
+
+app.get("/checkstatus", (req, res) => {
+    console.log(jobs[req.query.jobId])
+    res.end("\n\nJobStatus: " + jobs[req.query.jobId] + "%\n\n")
+
+} )
+
+app.listen(8080, () => console.log("listening on 8080"));
+
+function updateJob(jobId, prg) {
+    jobs[jobId] = prg;
+    console.log(`updated ${jobId} to ${prg}`)
+    if (prg == 100) return;
+    this.setTimeout(()=> updateJob(jobId, prg + 10), 3000)
+}

code/protocol_demos/short-polling/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "short-polling",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.18.2"
+  }
+}