Esempio n. 1
0
// TestMiscErrors tests a few error conditions not covered elsewhere.
func TestMiscErrors(t *testing.T) {
	t.Parallel()

	// Force an error in NewRequest by giving it a parameter type that is
	// not supported.
	_, err := btcjson.NewRequest(nil, "test", []interface{}{make(chan int)})
	if err == nil {
		t.Error("NewRequest: did not receive error")
		return
	}

	// Force an error in MarshalResponse by giving it an id type that is not
	// supported.
	wantErr := btcjson.Error{ErrorCode: btcjson.ErrInvalidType}
	_, err = btcjson.MarshalResponse(make(chan int), nil, nil)
	if jerr, ok := err.(btcjson.Error); !ok || jerr.ErrorCode != wantErr.ErrorCode {
		t.Errorf("MarshalResult: did not receive expected error - got "+
			"%v (%[1]T), want %v (%[2]T)", err, wantErr)
		return
	}

	// Force an error in MarshalResponse by giving it a result type that
	// can't be marshalled.
	_, err = btcjson.MarshalResponse(1, make(chan int), nil)
	if _, ok := err.(*json.UnsupportedTypeError); !ok {
		wantErr := &json.UnsupportedTypeError{}
		t.Errorf("MarshalResult: did not receive expected error - got "+
			"%v (%[1]T), want %T", err, wantErr)
		return
	}
}
Esempio n. 2
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// This example demonstrates how to marshal a JSON-RPC response.
func ExampleMarshalResponse() {
	// Marshal a new JSON-RPC response.  For example, this is a response
	// to a getblockheight request.
	marshalledBytes, err := btcjson.MarshalResponse(1, 350001, nil)
	if err != nil {
		fmt.Println(err)
		return
	}

	// Display the marshalled response.  Ordinarily this would be sent
	// across the wire to the RPC client, but for this example, just display
	// it.
	fmt.Printf("%s\n", marshalledBytes)

	// Output:
	// {"result":350001,"error":null,"id":1}
}
Esempio n. 3
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// TestMarshalResponse ensures the MarshalResponse function works as expected.
func TestMarshalResponse(t *testing.T) {
	t.Parallel()

	testID := 1
	tests := []struct {
		name     string
		result   interface{}
		jsonErr  *btcjson.RPCError
		expected []byte
	}{
		{
			name:     "ordinary bool result with no error",
			result:   true,
			jsonErr:  nil,
			expected: []byte(`{"result":true,"error":null,"id":1}`),
		},
		{
			name:   "result with error",
			result: nil,
			jsonErr: func() *btcjson.RPCError {
				return btcjson.NewRPCError(btcjson.ErrRPCBlockNotFound, "123 not found")
			}(),
			expected: []byte(`{"result":null,"error":{"code":-5,"message":"123 not found"},"id":1}`),
		},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		_, _ = i, test
		marshalled, err := btcjson.MarshalResponse(testID, test.result, test.jsonErr)
		if err != nil {
			t.Errorf("Test #%d (%s) unexpected error: %v", i,
				test.name, err)
			continue
		}

		if !reflect.DeepEqual(marshalled, test.expected) {
			t.Errorf("Test #%d (%s) mismatched result - got %s, "+
				"want %s", i, test.name, marshalled,
				test.expected)
		}
	}
}
Esempio n. 4
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// postClientRPC processes and replies to a JSON-RPC client request.
func (s *Server) postClientRPC(w http.ResponseWriter, r *http.Request) {
	body := http.MaxBytesReader(w, r.Body, maxRequestSize)
	rpcRequest, err := ioutil.ReadAll(body)
	if err != nil {
		// TODO: what if the underlying reader errored?
		http.Error(w, "413 Request Too Large.",
			http.StatusRequestEntityTooLarge)
		return
	}

	// First check whether wallet has a handler for this request's method.
	// If unfound, the request is sent to the chain server for further
	// processing.  While checking the methods, disallow authenticate
	// requests, as they are invalid for HTTP POST clients.
	var req btcjson.Request
	err = json.Unmarshal(rpcRequest, &req)
	if err != nil {
		resp, err := btcjson.MarshalResponse(req.ID, nil, btcjson.ErrRPCInvalidRequest)
		if err != nil {
			log.Errorf("Unable to marshal response: %v", err)
			http.Error(w, "500 Internal Server Error",
				http.StatusInternalServerError)
			return
		}
		_, err = w.Write(resp)
		if err != nil {
			log.Warnf("Cannot write invalid request request to "+
				"client: %v", err)
		}
		return
	}

	// Create the response and error from the request.  Two special cases
	// are handled for the authenticate and stop request methods.
	var res interface{}
	var jsonErr *btcjson.RPCError
	var stop bool
	switch req.Method {
	case "authenticate":
		// Drop it.
		return
	case "stop":
		stop = true
		res = "btcwallet stopping"
	default:
		res, jsonErr = s.handlerClosure(&req)()
	}

	// Marshal and send.
	mresp, err := btcjson.MarshalResponse(req.ID, res, jsonErr)
	if err != nil {
		log.Errorf("Unable to marshal response: %v", err)
		http.Error(w, "500 Internal Server Error", http.StatusInternalServerError)
		return
	}
	_, err = w.Write(mresp)
	if err != nil {
		log.Warnf("Unable to respond to client: %v", err)
	}

	if stop {
		s.requestProcessShutdown()
	}
}
Esempio n. 5
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func (s *Server) websocketClientRespond(wsc *websocketClient) {
	// A for-select with a read of the quit channel is used instead of a
	// for-range to provide clean shutdown.  This is necessary due to
	// WebsocketClientRead (which sends to the allRequests chan) not closing
	// allRequests during shutdown if the remote websocket client is still
	// connected.
out:
	for {
		select {
		case reqBytes, ok := <-wsc.allRequests:
			if !ok {
				// client disconnected
				break out
			}

			var req btcjson.Request
			err := json.Unmarshal(reqBytes, &req)
			if err != nil {
				if !wsc.authenticated {
					// Disconnect immediately.
					break out
				}
				resp := makeResponse(req.ID, nil,
					btcjson.ErrRPCInvalidRequest)
				mresp, err := json.Marshal(resp)
				// We expect the marshal to succeed.  If it
				// doesn't, it indicates some non-marshalable
				// type in the response.
				if err != nil {
					panic(err)
				}
				err = wsc.send(mresp)
				if err != nil {
					break out
				}
				continue
			}

			if req.Method == "authenticate" {
				if wsc.authenticated || s.invalidAuth(&req) {
					// Disconnect immediately.
					break out
				}
				wsc.authenticated = true
				resp := makeResponse(req.ID, nil, nil)
				// Expected to never fail.
				mresp, err := json.Marshal(resp)
				if err != nil {
					panic(err)
				}
				err = wsc.send(mresp)
				if err != nil {
					break out
				}
				continue
			}

			if !wsc.authenticated {
				// Disconnect immediately.
				break out
			}

			switch req.Method {
			case "stop":
				resp := makeResponse(req.ID,
					"btcwallet stopping.", nil)
				mresp, err := json.Marshal(resp)
				// Expected to never fail.
				if err != nil {
					panic(err)
				}
				err = wsc.send(mresp)
				if err != nil {
					break out
				}
				s.requestProcessShutdown()
				break

			default:
				req := req // Copy for the closure
				f := s.handlerClosure(&req)
				wsc.wg.Add(1)
				go func() {
					resp, jsonErr := f()
					mresp, err := btcjson.MarshalResponse(req.ID, resp, jsonErr)
					if err != nil {
						log.Errorf("Unable to marshal response: %v", err)
					} else {
						_ = wsc.send(mresp)
					}
					wsc.wg.Done()
				}()
			}

		case <-s.quit:
			break out
		}
	}

	// allow client to disconnect after all handler goroutines are done
	wsc.wg.Wait()
	close(wsc.responses)
	s.wg.Done()
}