messyidea · June 7, 2016 04:48 · Jun 7, 2016 · Oct 4, 2014
diff --git a/grproxy.go b/grproxy.go
@@ -9,9 +9,10 @@ import (
 	"strings"
 )
 
+
 func main() {
 
-	target, _ := url.Parse("http://www.google.com")
+	target, _ := url.Parse("https://www.google.com")
 	r := &httputil.ReverseProxy{
 		Director: func(req *http.Request) {
 			req.URL.Scheme = target.Scheme
@@ -27,7 +28,7 @@ func main() {
 	}
 
 	http.Handle("/", r)
-	http.ListenAndServe(":80", nil)
+	http.ListenAndServeTLS(":443", "public.crt", "private.pem", nil)
 }
 
 func singleJoiningSlash(a, b string) string {
@@ -41,3 +42,6 @@ func singleJoiningSlash(a, b string) string {
 	}
 	return a + b
 }
+
+// openssl genrsa -out private.pem 2048
+// openssl req -new -x509 -sha256 -key private.pem -out public.crt -days 99999
diff --git a/grproxy.go b/grproxy.go
@@ -0,0 +1,43 @@
+// grproxy project main.go
+package main
+
+import (
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+
+	"strings"
+)
+
+func main() {
+
+	target, _ := url.Parse("http://www.google.com")
+	r := &httputil.ReverseProxy{
+		Director: func(req *http.Request) {
+			req.URL.Scheme = target.Scheme
+			req.URL.Host = target.Host
+			req.Host = target.Host //这才是关键
+			req.URL.Path = singleJoiningSlash(target.Path, req.URL.Path)
+			if target.RawQuery == "" || req.URL.RawQuery == "" {
+				req.URL.RawQuery = target.RawQuery + req.URL.RawQuery
+			} else {
+				req.URL.RawQuery = target.RawQuery + "&" + req.URL.RawQuery
+			}
+		},
+	}
+
+	http.Handle("/", r)
+	http.ListenAndServe(":80", nil)
+}
+
+func singleJoiningSlash(a, b string) string {
+	aslash := strings.HasSuffix(a, "/")
+	bslash := strings.HasPrefix(b, "/")
+	switch {
+	case aslash && bslash:
+		return a + b[1:]
+	case !aslash && !bslash:
+		return a + "/" + b
+	}
+	return a + b
+}