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bf22aeec0a
- Modified Godeps/Godeps.json by hand - [TEST] Updated welcome docs hash to sharness - [TEST] Updated contact doc - [TEST] disabled breaking test (t0080-repo refs local)
41 lines
1.0 KiB
Go
41 lines
1.0 KiB
Go
package protocol
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import (
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"io"
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msgio "github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-msgio"
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)
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// ID is an identifier used to write protocol headers in streams.
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type ID string
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// These are reserved protocol.IDs.
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const (
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TestingID ID = "/p2p/_testing"
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)
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// WriteHeader writes a protocol.ID header to an io.Writer. This is so
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// multiple protocols can be multiplexed on top of the same transport.
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//
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// We use go-msgio varint encoding:
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// <varint length><string name>\n
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// (the varint includes the \n)
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func WriteHeader(w io.Writer, id ID) error {
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vw := msgio.NewVarintWriter(w)
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s := string(id) + "\n" // add \n
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return vw.WriteMsg([]byte(s))
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}
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// ReadHeader reads a protocol.ID header from an io.Reader. This is so
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// multiple protocols can be multiplexed on top of the same transport.
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// See WriteHeader.
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func ReadHeader(r io.Reader) (ID, error) {
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vr := msgio.NewVarintReader(r)
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msg, err := vr.ReadMsg()
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if err != nil {
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return ID(""), err
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}
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msg = msg[:len(msg)-1] // remove \n
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return ID(msg), nil
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}
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