/
main.go
65 lines (50 loc) · 1.37 KB
/
main.go
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package main
import (
"github.com/gin-gonic/gin"
"github.com/jondot/armor"
"time"
"net/url"
"net/http/httputil"
"net/http"
)
type HeaderPokingTransport struct {
AddHeaders map[interface{}]interface{}
RemoveHeaders map[interface{}]interface{}
}
func (t *HeaderPokingTransport) RoundTrip(req *http.Request) (*http.Response, error) {
req.Host = "" // force using url host
resp, err := http.DefaultTransport.RoundTrip(req)
if err != nil{
return resp, err
}
for k, _ := range(t.RemoveHeaders){
resp.Header.Del(k.(string))
}
for k, v := range(t.AddHeaders){
resp.Header.Add(k.(string), v.(string))
}
return resp, nil
}
func main() {
m := armor.New("sticker", "1.0")
r := m.GinRouter()
backend := m.Config.GetString("backend")
addHeaders := m.Config.Get("add_headers").(map[interface{}]interface{})
removeHeaders := m.Config.Get("remove_headers").(map[interface{}]interface{})
u, err := url.Parse(backend)
if err != nil {
m.Log.Fatalf("Cannot parse backend url %s, error: %s", u, err)
}
proxy := httputil.NewSingleHostReverseProxy(u)
proxy.Transport = &HeaderPokingTransport{
RemoveHeaders:removeHeaders,
AddHeaders:addHeaders,
}
r.GET("/api/*any", func(c *gin.Context) {
defer m.Metrics.Timed("timed.request", time.Now())
m.Metrics.Inc("request")
c.Request.URL.Path = c.Request.URL.Path[5:]
proxy.ServeHTTP(c.Writer, c.Request)
})
m.Run(r)
}