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router_frontends.go
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router_frontends.go
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// Copyright 2015 Luke Shumaker
package httpentity
import (
"net/http"
"strings"
)
// Route routes and handles a request, returning the response.
func (router *Router) Route(req Request) (res Response) {
router.Log.Printf("Route: %s %q\n", req.Method, req.URL.String())
u, mimetype := normalizeURL(req.URL)
req.URL = u
if mimetype != "" {
// the file extension overrides the Accept: header
req.Headers.Set("Accept", mimetype)
}
defer router.finish(req, &res)
res = router.outsideHandler(req)
return
}
func (router *Router) serveHTTP(w http.ResponseWriter, r *http.Request) (res Response) {
// adapt the request from `net/http` format to `httpentity` format
req := Request{
Method: r.Method,
URL: r.URL,
Headers: r.Header,
Entity: nil,
Things: map[string]interface{}{},
}
if r.TLS != nil {
req.URL.Scheme = "https"
}
router.Log.Printf("ServeHTTP: %s %q\n", req.Method, r.URL.String())
if router.TrustForwarded {
if scheme := req.Headers.Get("X-Forwarded-Proto"); scheme != "" {
req.URL.Scheme = scheme
}
if str := req.Headers.Get("Forwarded"); str != "" {
parts := strings.Split(str, ";")
for i := range parts {
ary := strings.SplitN(parts[i], "=", 2)
if len(ary) == 2 {
if strings.EqualFold("proto", ary[0]) {
req.URL.Scheme = ary[1]
}
}
}
}
}
u, mimetype := normalizeURL(req.URL)
req.URL = u
if mimetype != "" {
// the file extension overrides the Accept: header
req.Headers.Set("Accept", mimetype)
}
defer router.finish(req, &res)
// parse the submitted entity
switch req.Method {
case "POST", "PUT", "PATCH":
resperr := req.readEntity(router, r.Body, r.Header.Get("Content-Type"))
if resperr != nil {
return *resperr
}
}
// run the request
res = router.outsideHandler(req)
return
}
// ServeHTTP makes the Router fulfill the "net/http".Handler
// interface.
func (router *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
res := router.serveHTTP(w, req)
// Adapt the response from `httpentity` format to `net/http` format
for k, v := range res.Headers {
w.Header().Set(k, strings.Join(v, ", "))
}
w.WriteHeader(int(res.Status))
err := res.writeEntity(w)
if err != nil {
router.Log.Printf("writeEntity err: %v\n", err)
}
}