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minio/pkg/controller/rpc.go

79 lines
2.0 KiB

/*
* Minio Cloud Storage, (C) 2015 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package controller
import (
"bytes"
"net/http"
"github.com/minio/minio/internal/github.com/gorilla/rpc/v2/json"
"github.com/minio/minio/pkg/probe"
)
// RPCOps RPC operation
type RPCOps struct {
Method string
Request interface{}
}
// RPCRequest rpc client request
type RPCRequest struct {
req *http.Request
transport http.RoundTripper
}
// NewRequest initiate a new client RPC request
func NewRequest(url string, op RPCOps, transport http.RoundTripper) (*RPCRequest, *probe.Error) {
params, err := json.EncodeClientRequest(op.Method, op.Request)
if err != nil {
return nil, probe.NewError(err)
}
req, err := http.NewRequest("POST", url, bytes.NewReader(params))
if err != nil {
return nil, probe.NewError(err)
}
rpcReq := &RPCRequest{}
rpcReq.req = req
rpcReq.req.Header.Set("Content-Type", "application/json")
if transport == nil {
transport = http.DefaultTransport
}
rpcReq.transport = transport
return rpcReq, nil
}
// Do - make a http connection
func (r RPCRequest) Do() (*http.Response, *probe.Error) {
resp, err := r.transport.RoundTrip(r.req)
if err != nil {
if werr, ok := probe.ToWrappedError(err); ok {
return nil, werr.ToError().Trace()
}
return nil, probe.NewError(err)
}
return resp, nil
}
// Get - get value of requested header
func (r RPCRequest) Get(key string) string {
return r.req.Header.Get(key)
}
// Set - set value of a header key
func (r *RPCRequest) Set(key, value string) {
r.req.Header.Set(key, value)
}