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helper.go
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helper.go
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// MIT License
//
// Copyright (c) 2020 Lack
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package helper
import (
"context"
"crypto/tls"
"crypto/x509"
"errors"
"fmt"
"io/ioutil"
"os"
"strings"
"github.com/gofiber/fiber/v2"
"github.com/lack-io/cli"
"github.com/lack-io/vine/util/context/metadata"
)
func RequestToContext(c *fiber.Ctx) context.Context {
ctx := context.Background()
md := make(metadata.Metadata)
c.Request().Header.VisitAll(func(key, value []byte) {
md.Set(string(key), string(value))
})
return metadata.NewContext(ctx, md)
}
func TLSConfig(ctx *cli.Context) (*tls.Config, error) {
cert := ctx.String("tls-cert-file")
key := ctx.String("tls-key-file")
ca := ctx.String("tls-client-ca-file")
if len(cert) > 0 && len(key) > 0 {
certs, err := tls.LoadX509KeyPair(cert, key)
if err != nil {
return nil, err
}
if len(ca) > 0 {
caCert, err := ioutil.ReadFile(ca)
if err != nil {
return nil, err
}
caCertPool := x509.NewCertPool()
caCertPool.AppendCertsFromPEM(caCert)
return &tls.Config{
Certificates: []tls.Certificate{certs},
ClientCAs: caCertPool,
ClientAuth: tls.RequireAndVerifyClientCert,
NextProtos: []string{"h2", "http/1.1"},
}, nil
}
return &tls.Config{
Certificates: []tls.Certificate{certs}, NextProtos: []string{"h2", "http/1.1"},
}, nil
}
return nil, errors.New("TLS certificate and key files not specified")
}
// UnexpectedSubcommand checks for erroneous subcommands and prints help and returns error
func UnexpectedSubcommand(ctx *cli.Context) error {
if first := ctx.Args().First(); first != "" {
// received something that isn't a subcommand
return fmt.Errorf("Unrecognized subcommand for %s: %s. Please refer to '%s help'", ctx.App.Name, first, ctx.App.Name)
}
return nil
}
func UnexpectedCommand(ctx *cli.Context) error {
commandName := ""
// We fall back to os.Args as ctx does not seem to have the original command.
for _, arg := range os.Args[1:] {
// Exclude flags
if !strings.HasPrefix(arg, "-") {
commandName = arg
}
}
return fmt.Errorf("Unrecognized vine command: %s. Please refer to 'vine help'", commandName)
}