Refactor into packages

1 files changed, 29 insertions, 0 deletions

diff --git a/handlers/passthrough.go b/handlers/passthrough.go
new file mode 100644
index 0000000..f322d3a
--- /dev/null
+++ b/handlers/passthrough.go
@@ -0,0 +1,29 @@
+package handlers
+
+import (
+	"github.com/valyala/fasthttp"
+	"net/http"
+	"portgate"
+)
+
+// 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 portgate.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(h.config.MakeUrl(p))
+	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.")
+	}
+}