ServeHTTP makes the router implement the http.Handler interface.
(w http.ResponseWriter, req *http.Request)
| 376 | |
| 377 | // ServeHTTP makes the router implement the http.Handler interface. |
| 378 | func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) { |
| 379 | if r.PanicHandler != nil { |
| 380 | defer r.recv(w, req) |
| 381 | } |
| 382 | |
| 383 | path := req.URL.Path |
| 384 | |
| 385 | if root := r.trees[req.Method]; root != nil { |
| 386 | if handle, ps, tsr := root.getValue(path); handle != nil { |
| 387 | handle(w, req, ps) |
| 388 | return |
| 389 | } else if req.Method != http.MethodConnect && path != "/" { |
| 390 | code := 301 // Permanent redirect, request with GET method |
| 391 | if req.Method != http.MethodGet { |
| 392 | // Temporary redirect, request with same method |
| 393 | // As of Go 1.3, Go does not support status code 308. |
| 394 | code = 307 |
| 395 | } |
| 396 | |
| 397 | if tsr && r.RedirectTrailingSlash { |
| 398 | if len(path) > 1 && path[len(path)-1] == '/' { |
| 399 | req.URL.Path = path[:len(path)-1] |
| 400 | } else { |
| 401 | req.URL.Path = path + "/" |
| 402 | } |
| 403 | http.Redirect(w, req, req.URL.String(), code) |
| 404 | return |
| 405 | } |
| 406 | |
| 407 | // Try to fix the request path |
| 408 | if r.RedirectFixedPath { |
| 409 | fixedPath, found := root.findCaseInsensitivePath( |
| 410 | CleanPath(path), |
| 411 | r.RedirectTrailingSlash, |
| 412 | ) |
| 413 | if found { |
| 414 | req.URL.Path = string(fixedPath) |
| 415 | http.Redirect(w, req, req.URL.String(), code) |
| 416 | return |
| 417 | } |
| 418 | } |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | if req.Method == http.MethodOptions && r.HandleOPTIONS { |
| 423 | // Handle OPTIONS requests |
| 424 | if allow := r.allowed(path, http.MethodOptions); allow != "" { |
| 425 | w.Header().Set("Allow", allow) |
| 426 | if r.GlobalOPTIONS != nil { |
| 427 | r.GlobalOPTIONS.ServeHTTP(w, req) |
| 428 | } |
| 429 | return |
| 430 | } |
| 431 | } else if r.HandleMethodNotAllowed { // Handle 405 |
| 432 | if allow := r.allowed(path, req.Method); allow != "" { |
| 433 | w.Header().Set("Allow", allow) |
| 434 | if r.MethodNotAllowed != nil { |
| 435 | r.MethodNotAllowed.ServeHTTP(w, req) |