forked from yarpc/yarpc-go
/
inbound.go
109 lines (92 loc) · 3.13 KB
/
inbound.go
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// Copyright (c) 2016 Uber Technologies, Inc.
//
// 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 thrift
import (
"bytes"
"io/ioutil"
"github.com/yarpc/yarpc-go/internal/encoding"
"github.com/yarpc/yarpc-go/internal/meta"
"github.com/yarpc/yarpc-go/transport"
"github.com/thriftrw/thriftrw-go/protocol"
"github.com/thriftrw/thriftrw-go/wire"
"golang.org/x/net/context"
)
// thriftHandler wraps a Thrift Handler into a transport.Handler
type thriftHandler struct {
Handler Handler
Protocol protocol.Protocol
DisableEnveloping bool
}
func (t thriftHandler) Handle(ctx context.Context, opts transport.Options, treq *transport.Request, rw transport.ResponseWriter) error {
if err := encoding.Expect(treq, Encoding); err != nil {
return err
}
body, err := ioutil.ReadAll(treq.Body)
if err != nil {
return err
}
// We disable enveloping if either the client or the transport requires it.
proto := t.Protocol
if t.DisableEnveloping || isEnvelopingDisabled(opts) {
proto = disableEnvelopingProtocol{
Protocol: proto,
Type: wire.Call, // we only decode requests
}
}
envelope, err := proto.DecodeEnveloped(bytes.NewReader(body))
if err != nil {
return encoding.RequestBodyDecodeError(treq, err)
}
if envelope.Type != wire.Call {
return encoding.RequestBodyDecodeError(
treq, errUnexpectedEnvelopeType(envelope.Type))
}
// TODO(abg): Support oneway
reqMeta := meta.FromTransportRequest(treq)
res, err := t.Handler.Handle(ctx, reqMeta, envelope.Value)
if err != nil {
return err
}
if resType := res.Body.EnvelopeType(); resType != wire.Reply {
return encoding.ResponseBodyEncodeError(
treq, errUnexpectedEnvelopeType(resType))
}
value, err := res.Body.ToWire()
if err != nil {
return err
}
if res.IsApplicationError {
rw.SetApplicationError()
}
resMeta := res.Meta
if resMeta != nil {
meta.ToTransportResponseWriter(resMeta, rw)
}
err = proto.EncodeEnveloped(wire.Envelope{
Name: res.Body.MethodName(),
Type: res.Body.EnvelopeType(),
SeqID: envelope.SeqID,
Value: value,
}, rw)
if err != nil {
return encoding.ResponseBodyEncodeError(treq, err)
}
return nil
}