| // +build 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 ( |
| "context" |
| "io" |
| "net" |
| "net/http" |
| "os" |
| |
| "google.golang.org/grpc/codes" |
| "google.golang.org/grpc/status" |
| "google.golang.org/grpc/transport" |
| |
| netctx "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{}).DialContext(ctx, network, address) |
| } |
| |
| func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error { |
| req = req.WithContext(ctx) |
| if err := req.Write(conn); err != nil { |
| return 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, netctx.DeadlineExceeded: |
| return status.Error(codes.DeadlineExceeded, err.Error()) |
| case context.Canceled, netctx.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, netctx.Canceled: |
| return codes.Canceled |
| case context.DeadlineExceeded, netctx.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 |
| } |
