Metered io.Reader and io.Writer

A drop-in replacement to io.Reader and io.Writer from the standard library with the total number of bytes transfered.

🚀 Install

go get github.com/samber/go-metered-io

This library is v1 and follows SemVer strictly. No breaking changes will be made to exported APIs before v2.0.0.

💡 Spec

GoDoc: https://pkg.go.dev/github.com/samber/go-metered-io

Byte:

• metered.NewReader
• metered.NewWriter
• metered.NewReadCloser
• metered.NewWriteCloser
• metered.NewReadWriter

String:

• metered.NewStringWriter

Rune:

• metered.NewRuneReader

Examples

Metered reader

import "github.com/samber/go-metered-io"

r := metered.NewReader(strings.NewReader("Lorem ipsum dolor sit amet..."))

for {
    buff := make([]byte, 10)

    _, err := r.Read(buff)
    if err != nil {
        break
    }
}

fmt.Printf("Total bytes: %d", r.Rx())

Metered writer

import "github.com/samber/go-metered-io"

var buf bytes.Buffer
w := metered.NewWriter(&buf)

for i := 0 ; i < 10 ; i++ {
    _, err := w.Write("Hello world\n")
    if err != nil {
        break
    }
}

fmt.Printf("Total bytes: %d", w.Tx())

🤝 Contributing

• Ping me on twitter @samuelberthe (DMs, mentions, whatever :))
• Fork the project
• Fix open issues or request new features

Don't hesitate ;)

# Install some dev dependencies
make tools

# Run tests
make test
# or
make watch-test

👤 Contributors

💫 Show your support

Give a ⭐️ if this project helped you!

📝 License

Copyright © 2023 Samuel Berthe.

This project is MIT licensed.