Add support for request timeouts; timeout helper

lib/src/unit/HttpServer.ts

@@ -4,6 +4,10 @@ import Kernel from '../http/kernel/Kernel.ts'
 import {Logging} from '../service/logging/Logging.ts'
 import {serve} from '../external/http.ts'
 import {Request} from '../http/Request.ts'
+import {withTimeout} from '../support/timeout.ts'
+import {http} from '../http/response/helpers.ts'
+import {HTTPStatus} from '../const/http.ts'
+import Config from './Config.ts'
 
 @Unit()
 export default class HttpServer extends LifecycleUnit {
@@ -11,6 +15,7 @@ export default class HttpServer extends LifecycleUnit {
 
     constructor(
         protected readonly kernel: Kernel,
+        protected readonly config: Config,
         protected readonly logger: Logging,
     ) {
         super()
@@ -20,10 +25,24 @@ export default class HttpServer extends LifecycleUnit {
         this._server = serve({ port: 8000 })
         this.logger.success(`HTTP/S server listening on port 8000!`)
 
+        const request_timeout: number = this.config.get('server.request_timeout', 15000)
+
         for await ( const native_request of this._server ) {
             let req: Request = this.make(Request, native_request)
-            req = await this.kernel.handle(req)
-            req.response.send()
+
+            await withTimeout(request_timeout, this.kernel.handle(req))
+                .on_time(output_req => {
+                    output_req.response.send()
+                })
+                .late(output_req => {
+                    this.logger.error(`Request timed out. Response was already sent on path: ${req.path}. Consider increasing server.request_timeout.`)
+                })
+                .timeout(async () => {
+                    const factory = http(HTTPStatus.REQUEST_TIMEOUT)
+                    const output_req = await factory.write(req)
+                    output_req.response.send()
+                })
+                .run()
         }
     }
 }