feat: res (#4)

README.md

@@ -43,6 +43,9 @@ app.post('/entry/:id', ({ params }) => {
   }
 })
 
+// use `res` function to create Response object
+app.get('/money', ({ res }) => res('Payment required', { status: 402 }))
+
 // capture the parameters with RegExp
 app.get('/post/:date(\\d+)/:title([a-z]+)', ({ params }) => {
   const { date, title } = params
@@ -55,8 +58,8 @@ app.get('/search', ({ url }) => {
 })
 
 // handle the PURGE method and return Redirect response
-app.on('PURGE', '/cache', () => {
-  return new Response(null, {
+app.on('PURGE', '/cache', ({ res }) => {
+  return res(null, {
     status: 302,
     headers: {
       Location: '/',

examples/worker.ts

@@ -7,5 +7,6 @@ app.get('/entry/:id', ({ params }) => {
   const { id } = params
   return { 'your id is': id }
 })
+app.get('/money', ({ res }) => res('Payment required', { status: 402 }))
 
 export default app

src/pico.ts

@@ -44,27 +44,28 @@ class Pico extends defineDynamicClass() {
     }
   }
 
-  notFound = () => new Response('Not Found', { status: 404 })
+  res = (body?: BodyInit, init?: ResponseInit) => new Response(body, init)
 
   fetch = (request: Request, env?: object, executionContext?: ExecutionContext) => {
     const match = this.match(request.method, request.url)
-    if (match === undefined) return this.notFound()
+    if (match === undefined) return this.res('Not Found', { status: 404 })
     const response = match.handler({
       request,
       params: match.result.pathname.groups,
       url: new URL(request.url),
       env,
       executionContext,
+      res: this.res,
     })
     if (response instanceof Response) return response
     if (typeof response === 'string') {
-      return new Response(response, {
+      return this.res(response, {
         headers: {
           'Content-Type': 'text/plain; charset="utf-8"',
         },
       })
     } else if (typeof response === 'object') {
-      return new Response(JSON.stringify(response), {
+      return this.res(JSON.stringify(response), {
         headers: {
           'Content-Type': 'application/json',
         },

src/types.ts

@@ -5,4 +5,5 @@ export interface Context {
   executionContext: ExecutionContext
   params: Record<string, string>
   get url(): URL
+  res: (body?: BodyInit, init?: ResponseInit) => Response
 }

test/pico.test.ts

@@ -6,8 +6,8 @@ describe('Basic', () => {
   app.get('/json', () => ({
     message: 'hello',
   }))
-  app.get('*', () => {
-    return new Response('Custom Not Found', {
+  app.get('*', ({ res }) => {
+    return res('Custom Not Found', {
       status: 404,
     })
   })