Revert "userinfo: embed assets as data URLs for forward auth" (#3474)

Revert "userinfo: embed assets as data URLs for forward auth (#3460)"

This reverts commit 6c573282ee.

internal/urlutil/data.go

@@ -1,11 +0,0 @@
-package urlutil
-
-import (
-	"encoding/base64"
-)
-
-// DataURL returns a data-url for the data.
-func DataURL(mediaType string, data []byte) string {
-	bs := base64.StdEncoding.EncodeToString(data)
-	return "data:" + mediaType + ";base64," + bs
-}

ui/embed.go

@@ -5,17 +5,11 @@ import (
 	"bytes"
 	"encoding/json"
 	"io"
-	"mime"
 	"net/http"
-	"net/url"
-	"path"
 	"path/filepath"
-	"regexp"
-	"strings"
 	"time"
 
 	"github.com/pomerium/csrf"
-	"github.com/pomerium/pomerium/internal/urlutil"
 )
 
 // ServeFile serves a file.
@@ -54,19 +48,6 @@ func ServePage(w http.ResponseWriter, r *http.Request, page string, data map[str
 		return err
 	}
 
-	re, err := regexp.Compile(`(src|href)="(.*?)"`)
-	if err != nil {
-		return err
-	}
-
-	bs = re.ReplaceAllFunc(bs, func(b []byte) []byte {
-		parts := re.FindStringSubmatch(string(b))
-		if len(parts) < 3 {
-			return b
-		}
-		return []byte(parts[1] + `="` + embedRelativeFileURL(parts[2]) + `"`)
-	})
-
 	bs = bytes.Replace(bs,
 		[]byte("window.POMERIUM_DATA = {}"),
 		append([]byte("window.POMERIUM_DATA = "), jsonData...),
@@ -77,30 +58,3 @@ func ServePage(w http.ResponseWriter, r *http.Request, page string, data map[str
 }
 
 var startTime = time.Now()
-
-func embedRelativeFileURL(rawURL string) (dataURLOrOriginalURL string) {
-	u, err := url.Parse(rawURL)
-	if err != nil {
-		return rawURL
-	}
-
-	filePath := strings.Replace(u.Path, "/.pomerium/", "dist/", 1)
-	f, _, err := openFile(filePath)
-	if err != nil {
-		return rawURL
-	}
-	bs, err := io.ReadAll(f)
-	_ = f.Close()
-	if err != nil {
-		return rawURL
-	}
-
-	mediaType := mime.TypeByExtension(path.Ext(rawURL))
-	if mediaType == "" {
-		mediaType = "application/octet-stream"
-	}
-	if idx := strings.Index(mediaType, ";"); idx >= 0 {
-		mediaType = mediaType[:idx]
-	}
-	return urlutil.DataURL(mediaType, bs)
-}