Method ServeHTTP

router.go:212–287

ServeHTTP makes the router implement the http.Handler interface.

(ctx Context)

// ServeHTTP makes the router implement the http.Handler interface.
func (r *router) ServeHTTP(ctx Context) {
	req := ctx.Request().Request
	w := ctx.Response().Writer()
	path := req.URL.Path
	if root := r.Nodes[req.Method]; root != nil {
		if handle, ps, node, tsr := root.getValue(path); handle != nil {
			ctx.setRouterParams(ps)
			ctx.setRouterNode(node)
			handle(ctx)
			return
		} else if req.Method != "CONNECT" && path != "/" {
			code := 301 // Permanent redirect, request with GET method
			if req.Method != "GET" {
				// Temporary redirect, request with same method
				// As of Go 1.3, Go does not support status code 308.
				code = 307
			}

			if tsr && r.RedirectTrailingSlash {
				if len(path) > 1 && path[len(path)-1] == '/' {
					req.URL.Path = path[:len(path)-1]
				} else {
					req.URL.Path = path + "/"
				}
				http.Redirect(w, req, req.URL.String(), code)
				return
			}

			// Try to fix the request path
			if r.RedirectFixedPath {
				fixedPath, found := root.findCaseInsensitivePath(
					// file.CleanPath(path),
					paths.Clean(path),
					r.RedirectTrailingSlash,
				)
				if found {
					req.URL.Path = string(fixedPath)
					http.Redirect(w, req, req.URL.String(), code)
					return
				}
			}
		}
	}

	if req.Method == "OPTIONS" {
		// Handle OPTIONS requests
		if r.HandleOPTIONS {
			if allow := r.allowed(path, req.Method); len(allow) > 0 {
				w.Header().Set("Allow", allow)
				return
			}
		}
	} else {
		// Handle 405
		if allow := r.allowed(path, req.Method); len(allow) > 0 {
			w.Header().Set("Allow", allow)
			// In DefaultMethodNotAllowedHandler will be call SetStatusCode(http.StatusMethodNotAllowed)
			r.server.DotApp.MethodNotAllowedHandler(ctx)