You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
186 lines
5.0 KiB
186 lines
5.0 KiB
package rpcclient
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net"
|
|
"net/http"
|
|
"net/url"
|
|
"reflect"
|
|
"strings"
|
|
|
|
"github.com/pkg/errors"
|
|
types "github.com/tendermint/tendermint/rpc/lib/types"
|
|
)
|
|
|
|
// HTTPClient is a common interface for JSONRPCClient and URIClient.
|
|
type HTTPClient interface {
|
|
Call(method string, params map[string]interface{}, result interface{}) (interface{}, error)
|
|
}
|
|
|
|
// TODO: Deprecate support for IP:PORT or /path/to/socket
|
|
func makeHTTPDialer(remoteAddr string) (string, func(string, string) (net.Conn, error)) {
|
|
|
|
parts := strings.SplitN(remoteAddr, "://", 2)
|
|
var protocol, address string
|
|
if len(parts) != 2 {
|
|
// log.Warn("WARNING (tendermint/rpc/lib): Please use fully formed listening addresses, including the tcp:// or unix:// prefix")
|
|
protocol = types.SocketType(remoteAddr)
|
|
address = remoteAddr
|
|
} else {
|
|
protocol, address = parts[0], parts[1]
|
|
}
|
|
|
|
trimmedAddress := strings.Replace(address, "/", ".", -1) // replace / with . for http requests (dummy domain)
|
|
return trimmedAddress, func(proto, addr string) (net.Conn, error) {
|
|
return net.Dial(protocol, address)
|
|
}
|
|
}
|
|
|
|
// We overwrite the http.Client.Dial so we can do http over tcp or unix.
|
|
// remoteAddr should be fully featured (eg. with tcp:// or unix://)
|
|
func makeHTTPClient(remoteAddr string) (string, *http.Client) {
|
|
address, dialer := makeHTTPDialer(remoteAddr)
|
|
return "http://" + address, &http.Client{
|
|
Transport: &http.Transport{
|
|
Dial: dialer,
|
|
},
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------------
|
|
|
|
// JSON rpc takes params as a slice
|
|
type JSONRPCClient struct {
|
|
address string
|
|
client *http.Client
|
|
}
|
|
|
|
func NewJSONRPCClient(remote string) *JSONRPCClient {
|
|
address, client := makeHTTPClient(remote)
|
|
return &JSONRPCClient{
|
|
address: address,
|
|
client: client,
|
|
}
|
|
}
|
|
|
|
func (c *JSONRPCClient) Call(method string, params map[string]interface{}, result interface{}) (interface{}, error) {
|
|
request, err := types.MapToRequest("", method, params)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
requestBytes, err := json.Marshal(request)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// log.Info(string(requestBytes))
|
|
requestBuf := bytes.NewBuffer(requestBytes)
|
|
// log.Info(Fmt("RPC request to %v (%v): %v", c.remote, method, string(requestBytes)))
|
|
httpResponse, err := c.client.Post(c.address, "text/json", requestBuf)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer httpResponse.Body.Close()
|
|
responseBytes, err := ioutil.ReadAll(httpResponse.Body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// log.Info(Fmt("RPC response: %v", string(responseBytes)))
|
|
return unmarshalResponseBytes(responseBytes, result)
|
|
}
|
|
|
|
//-------------------------------------------------------------
|
|
|
|
// URI takes params as a map
|
|
type URIClient struct {
|
|
address string
|
|
client *http.Client
|
|
}
|
|
|
|
func NewURIClient(remote string) *URIClient {
|
|
address, client := makeHTTPClient(remote)
|
|
return &URIClient{
|
|
address: address,
|
|
client: client,
|
|
}
|
|
}
|
|
|
|
func (c *URIClient) Call(method string, params map[string]interface{}, result interface{}) (interface{}, error) {
|
|
values, err := argsToURLValues(params)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// log.Info(Fmt("URI request to %v (%v): %v", c.address, method, values))
|
|
resp, err := c.client.PostForm(c.address+"/"+method, values)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer resp.Body.Close()
|
|
responseBytes, err := ioutil.ReadAll(resp.Body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return unmarshalResponseBytes(responseBytes, result)
|
|
}
|
|
|
|
//------------------------------------------------
|
|
|
|
func unmarshalResponseBytes(responseBytes []byte, result interface{}) (interface{}, error) {
|
|
// read response
|
|
// if rpc/core/types is imported, the result will unmarshal
|
|
// into the correct type
|
|
// log.Notice("response", "response", string(responseBytes))
|
|
var err error
|
|
response := &types.RPCResponse{}
|
|
err = json.Unmarshal(responseBytes, response)
|
|
if err != nil {
|
|
return nil, errors.Errorf("Error unmarshalling rpc response: %v", err)
|
|
}
|
|
errorStr := response.Error
|
|
if errorStr != "" {
|
|
return nil, errors.Errorf("Response error: %v", errorStr)
|
|
}
|
|
// unmarshal the RawMessage into the result
|
|
err = json.Unmarshal(*response.Result, result)
|
|
if err != nil {
|
|
return nil, errors.Errorf("Error unmarshalling rpc response result: %v", err)
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
func argsToURLValues(args map[string]interface{}) (url.Values, error) {
|
|
values := make(url.Values)
|
|
if len(args) == 0 {
|
|
return values, nil
|
|
}
|
|
err := argsToJson(args)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
for key, val := range args {
|
|
values.Set(key, val.(string))
|
|
}
|
|
return values, nil
|
|
}
|
|
|
|
func argsToJson(args map[string]interface{}) error {
|
|
for k, v := range args {
|
|
rt := reflect.TypeOf(v)
|
|
isByteSlice := rt.Kind() == reflect.Slice && rt.Elem().Kind() == reflect.Uint8
|
|
if isByteSlice {
|
|
bytes := reflect.ValueOf(v).Bytes()
|
|
args[k] = fmt.Sprintf("0x%X", bytes)
|
|
continue
|
|
}
|
|
|
|
// Pass everything else to go-wire
|
|
data, err := json.Marshal(v)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
args[k] = string(data)
|
|
}
|
|
return nil
|
|
}
|