NodeJS has actually encapsulated all of the hard work. A simple server that will wait for HTTP GET statements. <\/p>\n\n\n\n
This simple server program has a lot of functionality. It is an example of three different endpoints that can be called. The \/hello and \/goodbye are pretty obvious and simply return a json message to the caller. <\/p>\n\n\n\n
const express = require('express')\nlet app = express()\napp.use(express.json());\n\n\n\napp.get('\/hello', (request, response) => {\n response.json({ \"message\": \"hello world\" });\n});\n\napp.get('\/goodbye', (request, response) => {\n response.status(200).send(\"goodbye world\");\n});\n\napp.get('\/x\/:id', (request, response) => {\n response.status(200).send(request.params.id );\n});\n\nconst port = process.env.PORT || 3000;\napp.listen(port, () => console.log(`listing on port ${port}` ));<\/pre>\n\n\n\nThe third endpoint is a bit more interesting as it allows you to pass in a parameter and easily as part of the URL. This particular example might be good for retrieving a value (ie book) by the code that is passed in. Because this is a service and not a web server it is only returning a value and not a webpage. But this is pretty useful as a backend server for your website.<\/p>\n\n\n\n
Just as important as the ability to get information it is important to be able to pass in a complex structure.<\/p>\n\n\n\n
app.post('\/newitem', (request, response) => {\n\n let body = request.body;\n console.log(\"body of post\")\n console.log(body);\n\n\n var keys = Object.keys(body);\n for (i in keys)\n console.log(i,keys[i],body[keys[i]]);\n\n response.status(200).send(request.params.id );\n});<\/pre>\n\n\n\nThis example post endpoint allows us to pass in any structure and print it out to the console. <\/p>\n\n\n\n
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In my next post I will expand on this for other features that might be useful.<\/p>\n\n\n\n
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NodeJS has actually encapsulated all of the hard work. A simple server that will wait for HTTP GET statements. This simple server program has a lot of functionality. It is an example of three different endpoints that can be called. … Continue reading