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|
package main
import (
"bytes"
"errors"
"fmt"
"strings"
)
type gitProtoRequest struct {
Command string
Pathname string
Host string
ExtraParameters []string
}
func parseGitProtoRequestPayload(payload []byte) (gitProtoRequest, error) {
parts := bytes.Split(payload, []byte{0})
if len(parts) == 0 || len(parts[0]) == 0 {
return gitProtoRequest{}, errors.New("missing command/path segment")
}
commandPath := string(parts[0])
command, pathname, ok := strings.Cut(commandPath, " ")
if !ok || command == "" || pathname == "" {
return gitProtoRequest{}, fmt.Errorf("malformed command/path segment %q", commandPath)
}
req := gitProtoRequest{
Command: command,
Pathname: pathname,
}
i := 1
if i < len(parts) && strings.HasPrefix(string(parts[i]), "host=") {
req.Host = strings.TrimPrefix(string(parts[i]), "host=")
i++
}
// No tail left.
if i >= len(parts) {
return req, nil
}
// If there is tail, grammar requires one empty field before extras.
if len(parts[i]) != 0 {
return gitProtoRequest{}, fmt.Errorf("unexpected token %q after host/path", string(parts[i]))
}
i++
for ; i < len(parts); i++ {
if len(parts[i]) == 0 {
continue
}
req.ExtraParameters = append(req.ExtraParameters, string(parts[i]))
}
return req, nil
}
|
