muesli / cancelreader Goto Github PK
View Code? Open in Web Editor NEWA cancelable reader for Go
License: MIT License
A cancelable reader for Go
License: MIT License
This package was exactly what I needed to solve a tricky issue in my code.
According to the Windows documentation:
The SetConsoleMode function can disable the ENABLE_PROCESSED_INPUT input mode for a console's input buffer, so CTRL+C is reported as keyboard input rather than as a signal.
In the windows implementation, we do:
var newMode uint32
newMode &^= windows.ENABLE_ECHO_INPUT
newMode &^= windows.ENABLE_LINE_INPUT
newMode &^= windows.ENABLE_MOUSE_INPUT
newMode &^= windows.ENABLE_WINDOW_INPUT
newMode &^= windows.ENABLE_PROCESSED_INPUT // This reports CTRL+C as an input rather than as a signal.
newMode |= windows.ENABLE_EXTENDED_FLAGS
newMode |= windows.ENABLE_INSERT_MODE
newMode |= windows.ENABLE_QUICK_EDIT_MODE
I believe it should be changed to newMode |= windows.ENABLE_PROCESSED_INPUT
so we keep the signal propagation.
On Windows, NewReader(os.Stdin)
will replace stdin with a handle to the console, even when stdin was previously redirected from a pipe.
This can be fixed by returning newFallbackCancelReader(reader)
when stdin is not a console.
hello, i found this problem when using bubbletea
.
test code:
func main() {
test(os.Stdin)
reader, _ := cancelreader.NewReader(os.Stdin)
test(reader)
}
func test(reader io.Reader) {
var buf [256]byte
n, err := reader.Read(buf[:])
if err != nil {
fmt.Println(err)
}
r, _ := utf8.DecodeRune(buf[:n])
fmt.Println("decode error ? ", r == utf8.RuneError)
fmt.Printf("%s \n", string(r))
fmt.Println(buf[:n])
fmt.Println("=============")
}
input: 好
output:
$ go run .
好
decode error ? false
好
[229 165 189 13 10]
=============
decode error ? true
�
[186 195]
=============
go version go1.19 windows/amd64 faild
go version go1.18 windows/amd64 falid
but it was successful on go version go1.18.3 linux/amd64
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