initial commit

1 files changed, 72 insertions, 0 deletions

diff --git a/main.go b/main.go
new file mode 100644
index 0000000..bd85dcc
--- /dev/null
+++ b/main.go
@@ -0,0 +1,72 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"strings"
+	"net"
+	"net/http"
+	"net/url"
+	log "github.com/sirupsen/logrus"
+)
+
+
+//type Endpoint struct {
+//	path string
+//	address string
+//}
+//
+//
+//func proxy(w http.ResponseWriter, req *http.Request, end Endpoint) {
+//}
+//
+//func makeProxiedRequest(w http.ResponseWriter, req *http.Request, end Endpoint) {
+//	
+//}
+//
+
+func main() {
+	const addr = "localhost:3333"
+	log.Info("configuring reverse proxy...")
+	origin, err := url.Parse("http://localhost:8000")
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Infof("listening on %v", addr)
+	http.ListenAndServe(addr, http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		req.Host = origin.Host
+		req.URL.Host = origin.Host
+		req.URL.Scheme = origin.Scheme
+		req.RequestURI = ""
+		// set X-Forwarded-For
+		forwardedFor, _, _ := net.SplitHostPort(req.RemoteAddr)
+		req.Header.Set("X-Forwarded-For", forwardedFor)
+		response, err := http.DefaultClient.Do(req)
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			fmt.Fprintf(w, "%v", err)
+			log.Fatal(err)
+		}
+
+		// copy header
+		for key, values := range response.Header {
+			for _, value := range values {
+				w.Header().Add(key, value)
+			}
+		}
+
+		// get trailer keys
+		trailerKeys := []string{}
+		for key := range response.Trailer {
+			trailerKeys = append(trailerKeys, key)
+		}
+		if (len(trailerKeys) > 0) {
+			w.Header().Set("Trailer", strings.Join(trailerKeys, ","))
+		}
+
+		w.WriteHeader(response.StatusCode)
+
+		// copy body
+		io.Copy(w, response.Body)
+	}))
+}