diff --git a/internal/bundler/bundler.go b/internal/bundler/bundler.go index 17a3c705ad8..d8585e4ec2f 100644 --- a/internal/bundler/bundler.go +++ b/internal/bundler/bundler.go @@ -318,18 +318,25 @@ func parseFile(args parseArgs) { func extractSourceMapFromComment(log logging.Log, fs fs.FS, source *logging.Source, comment ast.Span) (ast.Path, *string) { // Data URL if strings.HasPrefix(comment.Text, "data:") { - if strings.HasPrefix(comment.Text, "data:application/json;base64,") { - n := int32(len("data:application/json;base64,")) - encoded := comment.Text[n:] - decoded, err := base64.StdEncoding.DecodeString(encoded) - if err != nil { - r := ast.Range{Loc: ast.Loc{Start: comment.Range.Loc.Start + n}, Len: comment.Range.Len - n} - log.AddRangeWarning(source, r, "Invalid base64 data in source map") - return ast.Path{}, nil + if strings.HasPrefix(comment.Text, "data:application/json;") { + // Scan for the base64 part to support URLs like "data:application/json;charset=utf-8;base64," + if index := strings.Index(comment.Text, ";base64,"); index != -1 { + n := int32(index + len(";base64,")) + encoded := comment.Text[n:] + decoded, err := base64.StdEncoding.DecodeString(encoded) + if err != nil { + r := ast.Range{Loc: ast.Loc{Start: comment.Range.Loc.Start + n}, Len: comment.Range.Len - n} + log.AddRangeWarning(source, r, "Invalid base64 data in source map") + return ast.Path{}, nil + } + contents := string(decoded) + return ast.Path{Text: "sourceMappingURL in " + source.PrettyPath}, &contents } - contents := string(decoded) - return ast.Path{Text: "sourceMappingURL in " + source.PrettyPath}, &contents } + + // Anything else is unsupported + log.AddRangeWarning(source, comment.Range, "Unsupported source map comment") + return ast.Path{}, nil } // Absolute path