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encoding/xml: wrap charsetReader errors

This change wraps the errors from the CharsetReader function so the caller can distinguish different error conditions.

Context: I have an XML file with an unknown encoding which I like to handle separately. I like to use the CharsetReader for this but the error type has not been forwarded.

Change-Id: I6739a0dee04ec376cd20536be2806ce7f50c5213
GitHub-Last-Rev: ada9dd510f
GitHub-Pull-Request: golang/go#60199
Reviewed-on: https://go-review.googlesource.com/c/go/+/494897
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Thuy Linh Luu 2023-05-16 12:30:43 +00:00 committed by Gopher Robot
parent 865179164e
commit 6a675b9a7c

View File

@ -262,6 +262,9 @@ func NewTokenDecoder(t TokenReader) *Decoder {
// or EOF before all expected end elements,
// it will return an error.
//
// If CharsetReader is called and returns an error,
// the error is wrapped and returned.
//
// Token implements XML name spaces as described by
// https://www.w3.org/TR/REC-xml-names/. Each of the
// Name structures contained in the Token has the Space
@ -634,7 +637,7 @@ func (d *Decoder) rawToken() (Token, error) {
}
newr, err := d.CharsetReader(enc, d.r.(io.Reader))
if err != nil {
d.err = fmt.Errorf("xml: opening charset %q: %v", enc, err)
d.err = fmt.Errorf("xml: opening charset %q: %w", enc, err)
return nil, d.err
}
if newr == nil {