114 lines
3.6 KiB
Go
114 lines
3.6 KiB
Go
// +build go1.6,!go1.7
|
|
|
|
/*
|
|
* Copyright 2016, Google Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following disclaimer
|
|
* in the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of Google Inc. nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
package grpc
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"net/http"
|
|
"os"
|
|
|
|
"google.golang.org/grpc/codes"
|
|
"google.golang.org/grpc/status"
|
|
"google.golang.org/grpc/transport"
|
|
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
// dialContext connects to the address on the named network.
|
|
func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
|
|
return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address)
|
|
}
|
|
|
|
func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
|
|
req.Cancel = ctx.Done()
|
|
if err := req.Write(conn); err != nil {
|
|
return fmt.Errorf("failed to write the HTTP request: %v", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// toRPCErr converts an error into an error from the status package.
|
|
func toRPCErr(err error) error {
|
|
if _, ok := status.FromError(err); ok {
|
|
return err
|
|
}
|
|
switch e := err.(type) {
|
|
case transport.StreamError:
|
|
return status.Error(e.Code, e.Desc)
|
|
case transport.ConnectionError:
|
|
return status.Error(codes.Internal, e.Desc)
|
|
default:
|
|
switch err {
|
|
case context.DeadlineExceeded:
|
|
return status.Error(codes.DeadlineExceeded, err.Error())
|
|
case context.Canceled:
|
|
return status.Error(codes.Canceled, err.Error())
|
|
case ErrClientConnClosing:
|
|
return status.Error(codes.FailedPrecondition, err.Error())
|
|
}
|
|
}
|
|
return status.Error(codes.Unknown, err.Error())
|
|
}
|
|
|
|
// convertCode converts a standard Go error into its canonical code. Note that
|
|
// this is only used to translate the error returned by the server applications.
|
|
func convertCode(err error) codes.Code {
|
|
switch err {
|
|
case nil:
|
|
return codes.OK
|
|
case io.EOF:
|
|
return codes.OutOfRange
|
|
case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
|
|
return codes.FailedPrecondition
|
|
case os.ErrInvalid:
|
|
return codes.InvalidArgument
|
|
case context.Canceled:
|
|
return codes.Canceled
|
|
case context.DeadlineExceeded:
|
|
return codes.DeadlineExceeded
|
|
}
|
|
switch {
|
|
case os.IsExist(err):
|
|
return codes.AlreadyExists
|
|
case os.IsNotExist(err):
|
|
return codes.NotFound
|
|
case os.IsPermission(err):
|
|
return codes.PermissionDenied
|
|
}
|
|
return codes.Unknown
|
|
}
|