feat(proxy): Add reverse proxy feature

app/server/target.go

@@ -0,0 +1,43 @@
+package server
+
+import (
+	"net/http/httputil"
+	"net/url"
+
+	"git.secnex.io/secnex/api-gateway/config"
+	"git.secnex.io/secnex/masterlog"
+)
+
+type Targets map[string]*Target
+
+type Target struct {
+	ID    string
+	Name  string
+	URL   *url.URL
+	proxy *httputil.ReverseProxy
+}
+
+func NewTargets(cfg *config.Configuration) Targets {
+	targets := make(Targets)
+	for _, target := range cfg.Targets {
+		targets[target.ID] = NewTarget(&target)
+	}
+	return targets
+}
+
+func NewTarget(target *config.Target) *Target {
+	url, err := url.Parse(target.URL)
+	if err != nil {
+		masterlog.Error("Failed to parse target URL", map[string]interface{}{
+			"error":  err,
+			"target": target.URL,
+		})
+		return nil
+	}
+	return &Target{
+		ID:    target.ID,
+		Name:  target.Name,
+		URL:   url,
+		proxy: httputil.NewSingleHostReverseProxy(url),
+	}
+}