add pathParams

example/test.ts

@@ -2,12 +2,14 @@ import { Status } from "https://deno.land/std@0.186.0/http/http_status.ts";
 import { HTTPServer } from "../http_server.ts";
 
 const httpServer = new HTTPServer();
-httpServer.add("GET", "/", (_req, rep) => {
+httpServer.add("GET", "/", (req, rep) => {
   rep.status(Status.Teapot)
     .header("working", "true")
+    .type("application/json")
     .cookie("working", "true");
   
-  console.log(_req.cookie("working"));
+  console.log(req.cookie("working"));
+
   return JSON.stringify(
     {
       code: Status.Teapot,
@@ -17,6 +19,19 @@ httpServer.add("GET", "/", (_req, rep) => {
     2,
   );
 });
+httpServer.add("GET", "/api/user/:userId", (req, rep) => {
+  rep.status(Status.Teapot)
+  .type("application/json");
+
+  return JSON.stringify(
+    {
+      code: Status.Teapot,
+      message: `UserID is ${req.pathParams["userId"]}`,
+    },
+    null,
+    2,
+  );
+});
 httpServer.listen({
   port: 8080,
   staticLocalDir: "/static",

http_server.ts

@@ -18,6 +18,10 @@ type RouteHandler = (
 ) =>
   | Promise<unknown>
   | unknown;
+export type RouteParam = {
+  idx: number;
+  paramKey: string;
+};
 
 export class HTTPServer {
   private server?: Deno.Listener;
@@ -47,7 +51,7 @@ export class HTTPServer {
     }
   }
 
-  private async handleHttp(conn: Deno.Conn){
+  private async handleHttp(conn: Deno.Conn) {
     const httpConn = Deno.serveHttp(conn);
     for await (const requestEvent of httpConn) {
       const url = new URL(requestEvent.request.url);
@@ -84,15 +88,16 @@ export class HTTPServer {
         await requestEvent.respondWith(response);
         return;
       }
+      const routeRequest = new RouteRequest(requestEvent.request);
+      const routeReply: RouteReply = new RouteReply();
       const routeName = `${requestEvent.request.method}@${filepath}`;
-        const route = this.routes.has(routeName)
+      let route = this.routes.has(routeName)
         ? this.routes.get(routeName)
         : undefined;
 
       if (route) {
-          const routeReply: RouteReply = new RouteReply();
         const handler = await route.handler(
-            new RouteRequest(requestEvent.request),
+          routeRequest,
           routeReply,
         );
         await requestEvent.respondWith(
@@ -102,7 +107,41 @@ export class HTTPServer {
             statusText: STATUS_TEXT[routeReply.statusCode],
           }),
         );
-        } else {
+        continue;
+      }
+
+      route = Array.from(this.routes.values()).find((route) =>
+        routeWithParamsRouteMatcher(routeRequest, route)
+      );
+
+      if (route) {
+        const routeParamsMap: RouteParam[] = extractRouteParams(route.path);
+        const routeSegments: string[] = filepath.split("/");
+        routeRequest.pathParams = routeParamsMap.reduce(
+          (accum: { [key: string]: string | number }, curr: RouteParam) => {
+            return {
+              ...accum,
+              [curr.paramKey]: routeSegments[curr.idx],
+            };
+          },
+          {},
+        );
+
+        const handler = await route.handler(
+          routeRequest,
+          routeReply,
+        );
+        await requestEvent.respondWith(
+          new Response(handler as string, {
+            status: routeReply.statusCode,
+            headers: routeReply.headers,
+            statusText: STATUS_TEXT[routeReply.statusCode],
+          }),
+        );
+
+        continue;
+      }
+
       await requestEvent.respondWith(
         new Response(
           JSON.stringify({
@@ -116,7 +155,6 @@ export class HTTPServer {
       );
     }
   }
-  }
 
   get(path: string, handler: RouteHandler) {
     this.add("GET", path, handler);
@@ -145,6 +183,31 @@ export class HTTPServer {
   }
 }
 
+export const routeWithParamsRouteMatcher = (
+  req: RouteRequest,
+  route: Route,
+): boolean => {
+  const routeMatcherRegEx = new RegExp(`^${routeParamPattern(route.path)}$`);
+  return (
+    req.method === route.method &&
+    route.path.includes("/:") &&
+    routeMatcherRegEx.test(req.path)
+  );
+};
+
+export const routeParamPattern: (route: string) => string = (route) =>
+  route.replace(/\/\:[^/]{1,}/gi, "/[^/]{1,}").replace(/\//g, "\\/");
+
+export const extractRouteParams: (route: string) => RouteParam[] = (route) =>
+  route.split("/").reduce((accum: RouteParam[], curr: string, idx: number) => {
+    if (/:[A-Za-z1-9]{1,}/.test(curr)) {
+      const paramKey: string = curr.replace(":", "");
+      const param: RouteParam = { idx, paramKey };
+      return [...accum, param];
+    }
+    return accum;
+  }, []);
+
 export class Route {
   routeName: string;
   path: string;
@@ -160,10 +223,19 @@ export class Route {
 }
 
 export class RouteRequest {
+  url: string;
+  path: string;
   headers: Headers;
+  method: string;
+  pathParams: { [key: string]: string | number };
 
   constructor(request: Request) {
+    this.url = request.url;
+    const urlObj = new URL(request.url);
+    this.path = decodeURIComponent(urlObj.pathname);
     this.headers = request.headers;
+    this.method = request.method;
+    this.pathParams = {};
   }
 
   header(name: string) {
@@ -208,7 +280,7 @@ export class RouteReply {
     httpOnly?: boolean;
     sameSite?: "Strict" | "Lax" | "None";
     unparsed?: string[];
-  }) {
+  }): RouteReply {
     if (!value) {
       cookie.deleteCookie(this.headers, name, {
         domain: attributes?.domain,
@@ -228,5 +300,6 @@ export class RouteReply {
         unparsed: attributes?.unparsed,
       });
     }
+    return this;
   }
 }