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package rpcserver_test
import (
"bytes"
"encoding/json"
"io/ioutil"
"net/http"
"net/http/httptest"
"strings"
"testing"
"github.com/gorilla/websocket"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
amino "github.com/tendermint/go-amino"
"github.com/tendermint/tendermint/libs/log"
rs "github.com/tendermint/tendermint/rpc/lib/server"
types "github.com/tendermint/tendermint/rpc/lib/types"
)
//////////////////////////////////////////////////////////////////////////////
// HTTP REST API
// TODO
//////////////////////////////////////////////////////////////////////////////
// JSON-RPC over HTTP
func testMux() *http.ServeMux {
funcMap := map[string]*rs.RPCFunc{
"c": rs.NewRPCFunc(func(s string, i int) (string, error) { return "foo", nil }, "s,i"),
}
cdc := amino.NewCodec()
mux := http.NewServeMux()
buf := new(bytes.Buffer)
logger := log.NewTMLogger(buf)
rs.RegisterRPCFuncs(mux, funcMap, cdc, logger)
return mux
}
func statusOK(code int) bool { return code >= 200 && code <= 299 }
// Ensure that nefarious/unintended inputs to `params`
// do not crash our RPC handlers.
// See Issue https://github.com/tendermint/tendermint/issues/708.
func TestRPCParams(t *testing.T) {
mux := testMux()
tests := []struct {
payload string
wantErr string
expectedId interface{}
}{
// bad
{`{"jsonrpc": "2.0", "id": "0"}`, "Method not found", types.JSONRPCStringID("0")},
{`{"jsonrpc": "2.0", "method": "y", "id": "0"}`, "Method not found", types.JSONRPCStringID("0")},
{`{"method": "c", "id": "0", "params": a}`, "invalid character", types.JSONRPCStringID("")}, // id not captured in JSON parsing failures
{`{"method": "c", "id": "0", "params": ["a"]}`, "got 1", types.JSONRPCStringID("0")},
{`{"method": "c", "id": "0", "params": ["a", "b"]}`, "invalid character", types.JSONRPCStringID("0")},
{`{"method": "c", "id": "0", "params": [1, 1]}`, "of type string", types.JSONRPCStringID("0")},
// good
{`{"jsonrpc": "2.0", "method": "c", "id": "0", "params": null}`, "", types.JSONRPCStringID("0")},
{`{"method": "c", "id": "0", "params": {}}`, "", types.JSONRPCStringID("0")},
{`{"method": "c", "id": "0", "params": ["a", "10"]}`, "", types.JSONRPCStringID("0")},
}
for i, tt := range tests {
req, _ := http.NewRequest("POST", "http://localhost/", strings.NewReader(tt.payload))
rec := httptest.NewRecorder()
mux.ServeHTTP(rec, req)
res := rec.Result()
// Always expecting back a JSONRPCResponse
assert.True(t, statusOK(res.StatusCode), "#%d: should always return 2XX", i)
blob, err := ioutil.ReadAll(res.Body)
if err != nil {
t.Errorf("#%d: err reading body: %v", i, err)
continue
}
recv := new(types.RPCResponse)
assert.Nil(t, json.Unmarshal(blob, recv), "#%d: expecting successful parsing of an RPCResponse:\nblob: %s", i, blob)
assert.NotEqual(t, recv, new(types.RPCResponse), "#%d: not expecting a blank RPCResponse", i)
assert.Equal(t, tt.expectedId, recv.ID, "#%d: expected ID not matched in RPCResponse", i)
if tt.wantErr == "" {
assert.Nil(t, recv.Error, "#%d: not expecting an error", i)
} else {
assert.True(t, recv.Error.Code < 0, "#%d: not expecting a positive JSONRPC code", i)
// The wanted error is either in the message or the data
assert.Contains(t, recv.Error.Message+recv.Error.Data, tt.wantErr, "#%d: expected substring", i)
}
}
}
func TestJSONRPCID(t *testing.T) {
mux := testMux()
tests := []struct {
payload string
wantErr bool
expectedId interface{}
}{
// good id
{`{"jsonrpc": "2.0", "method": "c", "id": "0", "params": ["a", "10"]}`, false, types.JSONRPCStringID("0")},
{`{"jsonrpc": "2.0", "method": "c", "id": "abc", "params": ["a", "10"]}`, false, types.JSONRPCStringID("abc")},
{`{"jsonrpc": "2.0", "method": "c", "id": 0, "params": ["a", "10"]}`, false, types.JSONRPCIntID(0)},
{`{"jsonrpc": "2.0", "method": "c", "id": 1, "params": ["a", "10"]}`, false, types.JSONRPCIntID(1)},
{`{"jsonrpc": "2.0", "method": "c", "id": 1.3, "params": ["a", "10"]}`, false, types.JSONRPCIntID(1)},
{`{"jsonrpc": "2.0", "method": "c", "id": -1, "params": ["a", "10"]}`, false, types.JSONRPCIntID(-1)},
{`{"jsonrpc": "2.0", "method": "c", "id": null, "params": ["a", "10"]}`, false, nil},
// bad id
{`{"jsonrpc": "2.0", "method": "c", "id": {}, "params": ["a", "10"]}`, true, nil},
{`{"jsonrpc": "2.0", "method": "c", "id": [], "params": ["a", "10"]}`, true, nil},
}
for i, tt := range tests {
req, _ := http.NewRequest("POST", "http://localhost/", strings.NewReader(tt.payload))
rec := httptest.NewRecorder()
mux.ServeHTTP(rec, req)
res := rec.Result()
// Always expecting back a JSONRPCResponse
assert.True(t, statusOK(res.StatusCode), "#%d: should always return 2XX", i)
blob, err := ioutil.ReadAll(res.Body)
if err != nil {
t.Errorf("#%d: err reading body: %v", i, err)
continue
}
recv := new(types.RPCResponse)
err = json.Unmarshal(blob, recv)
assert.Nil(t, err, "#%d: expecting successful parsing of an RPCResponse:\nblob: %s", i, blob)
if !tt.wantErr {
assert.NotEqual(t, recv, new(types.RPCResponse), "#%d: not expecting a blank RPCResponse", i)
assert.Equal(t, tt.expectedId, recv.ID, "#%d: expected ID not matched in RPCResponse", i)
assert.Nil(t, recv.Error, "#%d: not expecting an error", i)
} else {
assert.True(t, recv.Error.Code < 0, "#%d: not expecting a positive JSONRPC code", i)
}
}
}
func TestRPCNotification(t *testing.T) {
mux := testMux()
body := strings.NewReader(`{"jsonrpc": "2.0", "id": ""}`)
req, _ := http.NewRequest("POST", "http://localhost/", body)
rec := httptest.NewRecorder()
mux.ServeHTTP(rec, req)
res := rec.Result()
// Always expecting back a JSONRPCResponse
require.True(t, statusOK(res.StatusCode), "should always return 2XX")
blob, err := ioutil.ReadAll(res.Body)
require.Nil(t, err, "reading from the body should not give back an error")
require.Equal(t, len(blob), 0, "a notification SHOULD NOT be responded to by the server")
}
func TestUnknownRPCPath(t *testing.T) {
mux := testMux()
req, _ := http.NewRequest("GET", "http://localhost/unknownrpcpath", nil)
rec := httptest.NewRecorder()
mux.ServeHTTP(rec, req)
res := rec.Result()
// Always expecting back a 404 error
require.Equal(t, http.StatusNotFound, res.StatusCode, "should always return 404")
}
//////////////////////////////////////////////////////////////////////////////
// JSON-RPC over WEBSOCKETS
func TestWebsocketManagerHandler(t *testing.T) {
s := newWSServer()
defer s.Close()
// check upgrader works
d := websocket.Dialer{}
c, dialResp, err := d.Dial("ws://"+s.Listener.Addr().String()+"/websocket", nil)
require.NoError(t, err)
if got, want := dialResp.StatusCode, http.StatusSwitchingProtocols; got != want {
t.Errorf("dialResp.StatusCode = %q, want %q", got, want)
}
// check basic functionality works
req, err := types.MapToRequest(amino.NewCodec(), types.JSONRPCStringID("TestWebsocketManager"), "c", map[string]interface{}{"s": "a", "i": 10})
require.NoError(t, err)
err = c.WriteJSON(req)
require.NoError(t, err)
var resp types.RPCResponse
err = c.ReadJSON(&resp)
require.NoError(t, err)
require.Nil(t, resp.Error)
}
func newWSServer() *httptest.Server {
funcMap := map[string]*rs.RPCFunc{
"c": rs.NewWSRPCFunc(func(wsCtx types.WSRPCContext, s string, i int) (string, error) { return "foo", nil }, "s,i"),
}
wm := rs.NewWebsocketManager(funcMap, amino.NewCodec())
wm.SetLogger(log.TestingLogger())
mux := http.NewServeMux()
mux.HandleFunc("/websocket", wm.WebsocketHandler)
return httptest.NewServer(mux)
}