From 7819a23171145e8a626e8357e88446817c8785dc Mon Sep 17 00:00:00 2001
From: Melonai <einebeere@gmail.com>
Date: Mon, 26 Jul 2021 14:12:26 +0200
Subject: Refactor into packages

---
 handler.go | 82 --------------------------------------------------------------
 1 file changed, 82 deletions(-)
 delete mode 100644 handler.go

(limited to 'handler.go')

diff --git a/handler.go b/handler.go
deleted file mode 100644
index 76ea010..0000000
--- a/handler.go
+++ /dev/null
@@ -1,82 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"github.com/valyala/fasthttp"
-	"net/http"
-)
-
-// RequestHandler keeps data relevant to the request handlers.
-type RequestHandler struct {
-	// Pointer to the global Portgate config, the values of which can change at runtime.
-	config *Config
-	// HTTP Client for requesting resources from the destination host.
-	client fasthttp.Client
-}
-
-// handleRequest handles all types of requests and delegates to more specific handlers.
-func (h *RequestHandler) handleRequest(ctx *fasthttp.RequestCtx) {
-	path := ParsePath(string(ctx.Path()))
-
-	if path.DestinationIdentifier == -1 {
-		// We were not given a port.
-
-		if path.ResourcePath == "/_portgate" {
-			h.handlePortgateRequest(ctx)
-		} else {
-			// Try to grab actual destination from Referer header.
-			refererPath, err := ParsePathFromReferer(path, string(ctx.Request.Header.Referer()))
-			if err != nil || refererPath.DestinationIdentifier == -1 {
-				// The referer path also has no destination
-				h.handleUnknownRequest(ctx)
-			} else {
-				// We found the destination from the referer path, so we
-				// redirect the user to the Portgate URL they should've requested.
-
-				portgateUrl := fmt.Sprintf("/%d%s", refererPath.DestinationIdentifier, refererPath.ResourcePath)
-				ctx.Redirect(portgateUrl, http.StatusTemporaryRedirect)
-			}
-		}
-	} else {
-		// We were given a port, so we have to pass the request through to the destination host.
-
-		h.handlePassthroughRequest(ctx, path)
-	}
-}
-
-// handlePassthroughRequest handles requests which are supposed to be proxied to the destination host.
-// If the user is authorized they are allowed to pass, otherwise they should be redirected to
-// the authentication page. (/_portgate)
-func (h *RequestHandler) handlePassthroughRequest(ctx *fasthttp.RequestCtx, p Path) {
-	// TODO: Check authorization.
-	// TODO: Check whether port is allowed to be accessed.
-
-	// We reuse the request given to us by the user with minor changes to route it to the
-	// destination host.
-	ctx.Request.SetRequestURI(p.MakeUrl(h.config.targetHost))
-	ctx.Request.Header.Set("Host", h.config.TargetAddress(p.DestinationIdentifier))
-
-	// We pipe the response given to us by the destination host back to the user.
-	// Since it's possible that we get a redirect, we take this into account,
-	// but only allow upto 10 redirects.
-	err := h.client.DoRedirects(&ctx.Request, &ctx.Response, 10)
-	if err != nil {
-		ctx.SetStatusCode(http.StatusInternalServerError)
-		_, _ = ctx.WriteString("An error occurred.")
-	}
-}
-
-// handlePortgateRequest handles all Portgate specific request for either showing Portgate
-// specific pages or handling creation of authorization tokens.
-func (h *RequestHandler) handlePortgateRequest(ctx *fasthttp.RequestCtx) {
-	// TODO: Implement authentication, authorization
-	_, _ = ctx.WriteString("Portgate request.")
-}
-
-// handleUnknownRequest handles any request which could not be processed due to missing
-// information.
-func (h *RequestHandler) handleUnknownRequest(ctx *fasthttp.RequestCtx) {
-	// TODO: Show error page
-	ctx.SetStatusCode(http.StatusNotFound)
-	_, _ = ctx.WriteString("Unknown request.")
-}
-- 
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