mirror of
https://github.com/holos-run/holos.git
synced 2026-03-20 09:15:02 +00:00
a1ededa722
This fixes Angular not being served up correctly. Note, special configuration in Angular is necessary to get the build output into the ui/ directory. Refer to: [Output path configuration][1] and [browser directory created in outputPath][2]. [1]: https://angular.io/guide/workspace-config#output-path-configuration [2]: https://github.com/angular/angular-cli/issues/26304
101 lines
2.9 KiB
Go
101 lines
2.9 KiB
Go
package frontend
|
|
|
|
import (
|
|
"bytes"
|
|
"embed"
|
|
"io/fs"
|
|
"net/http"
|
|
"text/template"
|
|
"time"
|
|
)
|
|
|
|
// Path needs to match <base href="/ui/"> in index.html and baseHref in angular.json
|
|
const Path = "/ui/"
|
|
|
|
// Output must be the relative path to where the frontend build too places the
|
|
// output index.html file. Tip: use the holos server frontend ls command to
|
|
// list the embedded file system.
|
|
// Refer to: https://angular.io/guide/workspace-config#output-path-configuration
|
|
// This should be the base output path with the browser field set to "ui" in angular.json
|
|
const OutputPath = "holos/dist/holos"
|
|
|
|
//go:embed all:holos/dist/holos/ui
|
|
var Dist embed.FS
|
|
|
|
//go:embed holos/dist/holos/ui/index.html
|
|
var spaIndexHtml []byte
|
|
|
|
// Root returns the content root subdirectory
|
|
func Root() fs.FS {
|
|
sub, err := fs.Sub(Dist, OutputPath)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return sub
|
|
}
|
|
|
|
// responseRecorder records http.StatusNotFound responses without
|
|
// writing the response to the client so the SPA can be served instead.
|
|
type responseRecorder struct {
|
|
http.ResponseWriter
|
|
status int
|
|
}
|
|
|
|
func (rw *responseRecorder) Write(p []byte) (int, error) {
|
|
if rw.status == http.StatusNotFound {
|
|
return len(p), nil
|
|
}
|
|
return rw.ResponseWriter.Write(p)
|
|
}
|
|
|
|
func (rw *responseRecorder) WriteHeader(status int) {
|
|
rw.status = status
|
|
if status != http.StatusNotFound {
|
|
rw.ResponseWriter.WriteHeader(status)
|
|
}
|
|
}
|
|
|
|
// SPAFileServer returns a http.Handler that calls h and falls back to serving
|
|
// the spa app container when h writes header http.StatusNotFound. Useful when
|
|
// the user's browser refreshes the page and the url is handled by a spa like
|
|
// react router.
|
|
func NewSPAFileServer(issuer string) func(http.Handler) http.Handler {
|
|
return func(h http.Handler) http.Handler {
|
|
spaIndexTemplate, err := template.New("index.html").Parse(string(spaIndexHtml))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
config := appConfig{OIDCIssuer: issuer}
|
|
buf := new(bytes.Buffer)
|
|
err = spaIndexTemplate.Execute(buf, config)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
spaIndex := buf.Bytes()
|
|
modTime := time.Time{}
|
|
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
if r.URL.Path == Path || r.URL.Path == Path+"index.html" {
|
|
w.Header().Set("Content-Type", "text/html; charset=utf-8")
|
|
http.ServeContent(w, r, "", modTime, bytes.NewReader(spaIndex))
|
|
return
|
|
}
|
|
|
|
// Serve static assets
|
|
discard404ResponseRecorder := &responseRecorder{ResponseWriter: w}
|
|
h.ServeHTTP(discard404ResponseRecorder, r)
|
|
if discard404ResponseRecorder.status == http.StatusNotFound {
|
|
w.Header().Set("Content-Type", "text/html; charset=utf-8")
|
|
http.ServeContent(w, r, "", modTime, bytes.NewReader(spaIndex))
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
// appConfig represents app configuration originating from the runtime
|
|
// deployment, pass to the front end app via template values in the single page
|
|
// app index.html.
|
|
type appConfig struct {
|
|
OIDCIssuer string
|
|
}
|