aws-lambda-event-router

URL-like inside routing for AWS lambda.

const router = require("aws-lambda-event-router").createRouter();
 
router.get("/", (event, context, params) => {
 context.succeed("welcome");
});
 
router.post("/books/:id", (event, context, params) => {
 context.succeed("this is book " + params.id);
});
 
exports.handler = router;

usage

Defining a router in lambda execution.

router.get("/", (event, context, params) => {
 context.succeed("welcome");
});

The router requires path and httpMethod in an event object. path should be url-formed string. A minimum event object is:

{
  "path" : "/",
  "httpMethod" : "GET"
}

Finally, exports the router as handler:

exports.handler = router;

Then a response will be welcome.

http methods

Now this library supports following methods.

• GET
• POST
• PUT
• DELETE
• HEAD
• PATCH
• OPTIONS

To set a callback for a request, router.get, router.post, router.put, router.delete, router.head, router.patch, and router.options are provided.

router.get("/", (event, context, params) => {
  context.succeed("get");
});
 
router.post("/", (event, context, params) => {
  context.succeed("post");
});
 
router.put("/", (event, context, params) => {
  context.succeed("put");
});
 
router.delete("/", (event, context, params) => {
  context.succeed("delete");
});
 
router.head("/", (event, context, params) => {
  context.succeed("head");
});
 
router.patch("/", (event, context, params) => {
  context.succeed("patch");
});
 
router.options("/", (event, context, params) => {
  context.succeed("options");
});

params

/path/:param_name style parameter is supported. You can access a parameter by req.params[param_name]. For instance:

router.get("/books/:id", (event, context, params) => {
  context.succeed("this is book " + params.id);
});

{
  "path" : "/books/1",
  "httpMethod" : "GET"
}

In this case, the response is this is book 1.

use

A router imports sub-routers by use method.

const router = Router.createRouter();
const subRouter = Router.createRouter();
subRouter.get("/hello", (event, context, params) => {
  context.succeed("hello from sub router");
});
router.use("/sub", subRouter);

{
  "path" : "/sub/hello",
  "httpMethod" : "GET"
}

LICENSE

MIT