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dovholuknf
83 lines
2.4 KiB
Go
83 lines
2.4 KiB
Go
/*
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Copyright NetFoundry Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package spa_handler
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import (
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"net/http"
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"os"
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"path/filepath"
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"strings"
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)
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type SinglePageAppHandler struct {
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HttpHandler http.Handler
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BindingKey string
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}
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func (spa *SinglePageAppHandler) Binding() string {
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return spa.BindingKey
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}
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func (spa *SinglePageAppHandler) Options() map[interface{}]interface{} {
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return nil
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}
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func (spa *SinglePageAppHandler) RootPath() string {
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return "/" + spa.BindingKey
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}
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func (spa *SinglePageAppHandler) IsHandler(r *http.Request) bool {
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return strings.HasPrefix(r.URL.Path, spa.RootPath()) || strings.HasPrefix(r.URL.Path, "/assets")
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}
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func (spa *SinglePageAppHandler) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
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spa.HttpHandler.ServeHTTP(writer, request)
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}
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// Thanks to https://github.com/roberthodgen/spa-server
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// Serve from a public directory with specific index
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type spaHandler struct {
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content string // The directory from which to serve
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contextRoot string // The context root to remove
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indexFile string // The fallback/default file to serve
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}
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// Falls back to a supplied index (indexFile) when either condition is true:
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// (1) Request (file) path is not found
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// (2) Request path is a directory
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// Otherwise serves the requested file.
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func (h *spaHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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r.URL.Path = strings.TrimPrefix(r.URL.Path, h.contextRoot)
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p := filepath.Join(h.content, filepath.Clean(r.URL.Path))
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if info, err := os.Stat(p); err != nil {
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http.ServeFile(w, r, filepath.Join(h.content, h.indexFile))
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return
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} else if info.IsDir() {
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http.ServeFile(w, r, filepath.Join(h.content, h.indexFile))
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return
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}
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http.ServeFile(w, r, p)
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}
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// SpaHandler returns a request handler (http.Handler) that serves a single
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// page application from a given public directory (location).
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func SpaHandler(location string, contextRoot string, indexFile string) http.Handler {
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return &spaHandler{location, contextRoot, indexFile}
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}
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