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45b59b8456
This convenience was necessary to be used for golang library functions like io.Copy and io.Pipe where we shouldn't be writing proxies and alternatives returning *probe.Error This change also brings more changes across code base for clear separation regarding where an error interface should be passed encapsulating *probe.Error and where it should be used as is.
80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
/*
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* Minio Cloud Storage, (C) 2015 Minio, Inc.
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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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package controller
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import (
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"bytes"
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"net/http"
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"github.com/gorilla/rpc/v2/json"
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"github.com/minio/minio/pkg/probe"
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)
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// RPCOps RPC operation
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type RPCOps struct {
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Method string
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Request interface{}
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}
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// RPCRequest rpc client request
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type RPCRequest struct {
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req *http.Request
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transport http.RoundTripper
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}
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// NewRequest initiate a new client RPC request
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func NewRequest(url string, op RPCOps, transport http.RoundTripper) (*RPCRequest, *probe.Error) {
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params, err := json.EncodeClientRequest(op.Method, op.Request)
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if err != nil {
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return nil, probe.NewError(err)
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}
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req, err := http.NewRequest("POST", url, bytes.NewReader(params))
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if err != nil {
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return nil, probe.NewError(err)
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}
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rpcReq := &RPCRequest{}
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rpcReq.req = req
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rpcReq.req.Header.Set("Content-Type", "application/json")
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if transport == nil {
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transport = http.DefaultTransport
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}
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rpcReq.transport = transport
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return rpcReq, nil
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}
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// Do - make a http connection
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func (r RPCRequest) Do() (*http.Response, *probe.Error) {
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resp, err := r.transport.RoundTrip(r.req)
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if err != nil {
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if werr, ok := probe.ToWrappedError(err); ok {
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return nil, werr.ToError().Trace()
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}
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return nil, probe.NewError(err)
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}
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return resp, nil
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}
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// Get - get value of requested header
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func (r RPCRequest) Get(key string) string {
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return r.req.Header.Get(key)
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}
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// Set - set value of a header key
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func (r *RPCRequest) Set(key, value string) {
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r.req.Header.Set(key, value)
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}
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