// Do holds a JSON-RPC request.
func Do(url, method string, args *openstack.Args) error {
message, err := json.EncodeClientRequest(method, args)
checkErr(err)
req, err := http.NewRequest("POST", url, bytes.NewBuffer(message))
checkErr(err)
req.Header.Set("Content-Type", "application/json")
client := new(http.Client)
resp, err := client.Do(req)
if err != nil {
log.Printf("Error in sending request to %s. %s", url, err)
return err
}
defer resp.Body.Close()
err = json.DecodeClientResponse(resp.Body, &result)
if err != nil {
log.Printf("Couldn't decode response. %s", err)
return err
}
log.Printf("url: %s, method: %s, args: %s", url, method, args)
return nil
}
func (rc *RpcClient) Execute(method string, req, res interface{}) error {
buf, _ := json.EncodeClientRequest(method, req)
body := bytes.NewBuffer(buf)
log.Println(body)
httpreq, _ := http.NewRequest("POST", rc.Address, body)
httpreq.Header.Set("Content-Type", "application/json")
response, err := rc.Httpclient.Do(httpreq)
if err != nil {
return err
}
return json.DecodeClientResponse(response.Body, res)
}
// newRPCRequest initiate a new client RPC request
func newRPCRequest(url string, op rpcOperation, 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
}
// newRPCRequest initiate a new client RPC request
func newRPCRequest(config *AuthConfig, url string, op rpcOperation, transport http.RoundTripper) (*rpcRequest, *probe.Error) {
t := time.Now().UTC()
params, err := json.EncodeClientRequest(op.Method, op.Request)
if err != nil {
return nil, probe.NewError(err)
}
body := bytes.NewReader(params)
req, err := http.NewRequest("POST", url, body)
if err != nil {
return nil, probe.NewError(err)
}
req.Header.Set("x-minio-date", t.Format(iso8601Format))
// save for subsequent use
hash := func() string {
sum256Bytes, _ := sum256Reader(body)
return hex.EncodeToString(sum256Bytes)
}
hashedPayload := hash()
req.Header.Set("Content-Type", "application/json")
req.Header.Set("x-minio-content-sha256", hashedPayload)
var headers []string
vals := make(map[string][]string)
for k, vv := range req.Header {
if _, ok := ignoredHeaders[http.CanonicalHeaderKey(k)]; ok {
continue // ignored header
}
headers = append(headers, strings.ToLower(k))
vals[strings.ToLower(k)] = vv
}
headers = append(headers, "host")
sort.Strings(headers)
var canonicalHeaders bytes.Buffer
for _, k := range headers {
canonicalHeaders.WriteString(k)
canonicalHeaders.WriteByte(':')
switch {
case k == "host":
canonicalHeaders.WriteString(req.URL.Host)
fallthrough
default:
for idx, v := range vals[k] {
if idx > 0 {
canonicalHeaders.WriteByte(',')
}
canonicalHeaders.WriteString(v)
}
canonicalHeaders.WriteByte('\n')
}
}
signedHeaders := strings.Join(headers, ";")
req.URL.RawQuery = strings.Replace(req.URL.Query().Encode(), "+", "%20", -1)
encodedPath := getURLEncodedName(req.URL.Path)
// convert any space strings back to "+"
encodedPath = strings.Replace(encodedPath, "+", "%20", -1)
//
// canonicalRequest =
// <HTTPMethod>\n
// <CanonicalURI>\n
// <CanonicalQueryString>\n
// <CanonicalHeaders>\n
// <SignedHeaders>\n
// <HashedPayload>
//
canonicalRequest := strings.Join([]string{
req.Method,
encodedPath,
req.URL.RawQuery,
canonicalHeaders.String(),
signedHeaders,
hashedPayload,
}, "\n")
scope := strings.Join([]string{
t.Format(yyyymmdd),
"us-east-1",
"rpc",
"rpc_request",
}, "/")
stringToSign := rpcAuthHeaderPrefix + "\n" + t.Format(iso8601Format) + "\n"
stringToSign = stringToSign + scope + "\n"
stringToSign = stringToSign + hex.EncodeToString(sum256([]byte(canonicalRequest)))
date := sumHMAC([]byte("MINIO"+config.Users["admin"].SecretAccessKey), []byte(t.Format(yyyymmdd)))
region := sumHMAC(date, []byte("us-east-1"))
service := sumHMAC(region, []byte("rpc"))
signingKey := sumHMAC(service, []byte("rpc_request"))
signature := hex.EncodeToString(sumHMAC(signingKey, []byte(stringToSign)))
// final Authorization header
parts := []string{
rpcAuthHeaderPrefix + " Credential=admin/" + scope,
"SignedHeaders=" + signedHeaders,
"Signature=" + signature,
}
auth := strings.Join(parts, ", ")
req.Header.Set("Authorization", auth)
rpcReq := &rpcRequest{}
rpcReq.req = req
if transport == nil {
transport = http.DefaultTransport
}
rpcReq.transport = transport
return rpcReq, nil
}