100 строки
2.6 KiB
Go
100 строки
2.6 KiB
Go
// +build go1.6,!go1.7
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/*
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*
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* Copyright 2016 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package grpc
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import (
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"fmt"
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"io"
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"net"
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"net/http"
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"os"
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"golang.org/x/net/context"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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"google.golang.org/grpc/transport"
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)
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// dialContext connects to the address on the named network.
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func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
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return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address)
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}
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func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
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req.Cancel = ctx.Done()
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if err := req.Write(conn); err != nil {
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return fmt.Errorf("failed to write the HTTP request: %v", err)
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}
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return nil
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}
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// toRPCErr converts an error into an error from the status package.
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func toRPCErr(err error) error {
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if err == nil || err == io.EOF {
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return err
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}
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if _, ok := status.FromError(err); ok {
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return err
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}
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switch e := err.(type) {
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case transport.StreamError:
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return status.Error(e.Code, e.Desc)
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case transport.ConnectionError:
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return status.Error(codes.Unavailable, e.Desc)
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default:
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switch err {
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case context.DeadlineExceeded:
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return status.Error(codes.DeadlineExceeded, err.Error())
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case context.Canceled:
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return status.Error(codes.Canceled, err.Error())
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}
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}
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return status.Error(codes.Unknown, err.Error())
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}
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// convertCode converts a standard Go error into its canonical code. Note that
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// this is only used to translate the error returned by the server applications.
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func convertCode(err error) codes.Code {
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switch err {
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case nil:
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return codes.OK
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case io.EOF:
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return codes.OutOfRange
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case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
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return codes.FailedPrecondition
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case os.ErrInvalid:
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return codes.InvalidArgument
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case context.Canceled:
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return codes.Canceled
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case context.DeadlineExceeded:
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return codes.DeadlineExceeded
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}
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switch {
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case os.IsExist(err):
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return codes.AlreadyExists
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case os.IsNotExist(err):
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return codes.NotFound
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case os.IsPermission(err):
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return codes.PermissionDenied
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}
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return codes.Unknown
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}
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