From fd486bbe0997bf8afb348050c81ead18ef3fc54d Mon Sep 17 00:00:00 2001
From: Simone Gotti <simone.gotti@gmail.com>
Date: Fri, 22 Feb 2019 09:34:48 +0100
Subject: [PATCH] gateway: add internal git server repos api

---
 internal/services/gateway/api/repos.go | 92 ++++++++++++++++++++++++++
 internal/services/gateway/gateway.go   |  4 ++
 2 files changed, 96 insertions(+)
 create mode 100644 internal/services/gateway/api/repos.go

diff --git a/internal/services/gateway/api/repos.go b/internal/services/gateway/api/repos.go
new file mode 100644
index 0000000..4e9daa3
--- /dev/null
+++ b/internal/services/gateway/api/repos.go
@@ -0,0 +1,92 @@
+// Copyright 2019 Sorint.lab
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package api
+
+import (
+	"io"
+	"net/http"
+	"net/url"
+
+	csapi "github.com/sorintlab/agola/internal/services/configstore/api"
+	"go.uber.org/zap"
+
+	"github.com/gorilla/mux"
+)
+
+type ReposHandler struct {
+	log               *zap.SugaredLogger
+	configstoreClient *csapi.Client
+}
+
+func NewReposHandler(logger *zap.Logger, configstoreClient *csapi.Client) *ReposHandler {
+	return &ReposHandler{log: logger.Sugar(), configstoreClient: configstoreClient}
+}
+
+func (h *ReposHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	vars := mux.Vars(r)
+	path := vars["rest"]
+
+	h.log.Infof("path: %s", path)
+
+	u, err := url.Parse("http://172.17.0.1:4003")
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	u.Path = path
+	u.RawQuery = r.URL.RawQuery
+
+	h.log.Infof("u: %s", u.String())
+	// TODO(sgotti) Check authorized call from client
+
+	defer r.Body.Close()
+	// proxy all the request body to the destination server
+	req, err := http.NewRequest(r.Method, u.String(), r.Body)
+	req = req.WithContext(ctx)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	// copy request headers
+	for k, vv := range r.Header {
+		for _, v := range vv {
+			req.Header.Add(k, v)
+		}
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	// copy response headers
+	for k, vv := range resp.Header {
+		for _, v := range vv {
+			w.Header().Add(k, v)
+		}
+	}
+	// copy status
+	w.WriteHeader(resp.StatusCode)
+
+	defer resp.Body.Close()
+	// copy response body
+	if _, err := io.Copy(w, resp.Body); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+}
diff --git a/internal/services/gateway/gateway.go b/internal/services/gateway/gateway.go
index 678b007..15424d3 100644
--- a/internal/services/gateway/gateway.go
+++ b/internal/services/gateway/gateway.go
@@ -171,6 +171,8 @@ func (g *Gateway) Run(ctx context.Context) error {
 
 	logsHandler := api.NewLogsHandler(logger, g.runserviceClient)
 
+	reposHandler := api.NewReposHandler(logger, g.configstoreClient)
+
 	loginUserHandler := api.NewLoginUserHandler(logger, g.ch, g.configstoreClient)
 	oauth2callbackHandler := api.NewOAuth2CallbackHandler(logger, g.ch, g.configstoreClient)
 
@@ -214,6 +216,8 @@ func (g *Gateway) Run(ctx context.Context) error {
 	router.Handle("/login", loginUserHandler).Methods("POST")
 	router.Handle("/oauth2/callback", oauth2callbackHandler).Methods("GET")
 
+	router.Handle("/repos/{rest:.*}", reposHandler).Methods("GET", "POST")
+
 	router.Handle("/webhooks", webhooksHandler).Methods("POST")
 	router.PathPrefix("/").HandlerFunc(handlers.NewWebBundleHandlerFunc(g.c.APIExposedURL))