documentdb.js

"use strict";

const http = require("http");
const DocumentClient = require('documentdb-q-promises').DocumentClientWrapper;

const host = "https://<name>.documents.azure.com:443/";// Add your endpoint
const masterKey = "...";// Add the masterkey of the endpoint
const client = new DocumentClient(host, { masterKey: masterKey });

// DB, Collection, Document 生成コードは面倒なので省きました。
// counter document's _SELF
const documentId = "dbs/.../colls/.../docs/.../";

const server = http.createServer((req, res) => {
    
    res.setHeader("Content-Type", "text/plain");
    res.writeHead(200);
    
    let startAt = Date.now();
    let readTime = -1;
    
    client.readDocumentAsync(documentId)
        .then(doc => {
            readTime = Date.now() - startAt;
            ++doc.resource.count;
            startAt = Date.now();
            return client.replaceDocumentAsync(doc.resource._self, doc.resource);
        })
        .then(doc => {
            res.end(`This is DocumentDB Read/Update Demo. -> count=${doc.resource.count} (r/w: ${readTime}/${Date.now() - startAt} ms)`);
        })
        .fail(err => {
            console.error("error!", err);
            res.end(JSON.stringify(err));
        });
});

server.listen(process.env.PORT);