Basic reverse proxy

1 files changed, 33 insertions, 0 deletions

diff --git a/main.go b/main.go
new file mode 100644
index 0000000..3a0df60
--- /dev/null
+++ b/main.go
@@ -0,0 +1,33 @@
+package main
+
+import (
+	"io"
+	"log"
+	"maps"
+	"net/http"
+)
+
+var client = http.Client{
+	CheckRedirect: func(req *http.Request, via []*http.Request) error { return http.ErrUseLastResponse },
+}
+
+func main() {
+	log.Fatal(http.ListenAndServe(":8081", http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		log.Println(request.RemoteAddr, request.RequestURI)
+
+		request.Host = "127.0.0.1:8080"
+		request.URL.Host = "127.0.0.1:8080"
+		request.URL.Scheme = "http"
+		request.RequestURI = ""
+
+		response, err := client.Do(request)
+		if err != nil {
+			http.Error(writer, err.Error(), http.StatusBadGateway)
+			return
+		}
+
+		maps.Copy(writer.Header(), response.Header)
+		writer.WriteHeader(response.StatusCode)
+		io.Copy(writer, response.Body)
+	})))
+}