Add kernel modules and basic kernel handling

src/http/kernel/HTTPCookieJar.ts

@@ -50,6 +50,10 @@ export class HTTPCookieJar {
         }
     }
 
+    has(name: string) {
+        return !!this.parsed[name]
+    }
+
     clear(name: string, options?: HTTPCookieOptions) {
         if ( !options ) options = {}
         options.expires = new Date(0)
@@ -68,7 +72,9 @@ export class HTTPCookieJar {
 
         for ( const key in this.parsed ) {
             if ( !this.parsed.hasOwnProperty(key) ) continue
+
             const cookie = this.parsed[key]
+            if ( cookie.exists ) continue
 
             const parts = []
             parts.push(`${key}=${encodeURIComponent(cookie.originalValue)}`)

src/http/kernel/module/PoweredByHeaderInjectionHTTPModule.ts

@@ -1,14 +1,17 @@
 import {HTTPKernelModule} from "../HTTPKernelModule";
 import {Request} from "../../lifecycle/Request";
+import {Injectable} from "@extollo/di"
 import {HTTPKernel} from "../HTTPKernel";
 
-export class PrepareRequestHTTPModule extends HTTPKernelModule {
+@Injectable()
+export class PoweredByHeaderInjectionHTTPModule extends HTTPKernelModule {
     public static register(kernel: HTTPKernel) {
-        kernel.register(this).first()
+        kernel.register(this).after()
     }
 
     public async apply(request: Request) {
-        await request.prepare()
+        // FIXME make this configurable
+        request.response.setHeader('X-Powered-By', 'Extollo')
         return request
     }
 }

src/http/kernel/module/SetSessionCookieHTTPModule.ts

@@ -0,0 +1,26 @@
+import {HTTPKernelModule} from "../HTTPKernelModule";
+import {Injectable, Inject} from "@extollo/di";
+import {uuid_v4} from "@extollo/util";
+import {HTTPKernel} from "../HTTPKernel";
+import {Request} from "../../lifecycle/Request";
+import {Logging} from "../../../service/Logging";
+
+@Injectable()
+export class SetSessionCookieHTTPModule extends HTTPKernelModule {
+    @Inject()
+    protected readonly logging!: Logging
+
+    public static register(kernel: HTTPKernel) {
+        kernel.register(this).first()  // TODO make this before inject session?
+    }
+
+    public async apply(request: Request) {
+        if ( !request.cookies.has('extollo.session') ) {
+            const session = `${uuid_v4()}-${uuid_v4()}`
+
+            this.logging.verbose(`Starting session: ${session}`)
+            request.cookies.set('extollo.session', session)  // FIXME allow configuring this
+        }
+        return request
+    }
+}