似乎很难找到关于WAMP.2协议的任何内容。我正在尝试使用Python，高速公路和扭曲连接到使用WAMP.2的webSocket。但是，我一直收到这个错误：
}
private class DirectionsJSONParser {
/**
* Receives a JSONObject and returns a list of lists containing latitude and longitude
*/
public List<List<HashMap<String, String>>> parse(JSONObject jObject) {
List<List<HashMap<String, String>>> routes = new ArrayList<>();
JSONArray jRoutes;
JSONArray jLegs;
JSONArray jSteps;
try {
jRoutes = jObject.getJSONArray("routes");
for (int i = 0; i < jRoutes.length(); i++) {
jLegs = ((JSONObject) jRoutes.get(i)).getJSONArray("legs");
List path = new ArrayList<>();
for (int j = 0; j < jLegs.length(); j++) {
jSteps = ((JSONObject) jLegs.get(j)).getJSONArray("steps");
for (int k = 0; k < jSteps.length(); k++) {
String polyline = "";
polyline = (String) ((JSONObject) ((JSONObject) jSteps.get(k)).get("polyline")).get("points");
List<LatLng> list = decodePoly(polyline);
for (int l = 0; l < list.size(); l++) {
HashMap<String, String> hm = new HashMap<>();
hm.put("lat", Double.toString((list.get(l)).latitude));
hm.put("lng", Double.toString((list.get(l)).longitude));
path.add(hm);
}
}
routes.add(path);
}
}
} catch (JSONException e) {
e.printStackTrace();
} catch (Exception e) {
}
return routes;
}
/**
* * Method to decode polyline points
* * Courtesy : https://jeffreysambells.com/2010/05/27/decoding-polylines-from-google-maps-direction-api-with-java
* *
*/
private List<LatLng> decodePoly(String encoded) {
List<LatLng> poly = new ArrayList<>();
int index = 0, len = encoded.length();
int lat = 0, lng = 0;
while (index < len) {
int b, shift = 0, result = 0;
do {
b = encoded.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lat += dlat;
shift = 0;
result = 0;
do {
b = encoded.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lng += dlng;
LatLng p = new LatLng((((double) lat / 1E5)),
(((double) lng / 1E5)));
poly.add(p);
}
return poly;
}
}
}
private String getDirectionsUrl(LatLng origin, LatLng dest) {
// Origin of route
String str_origin = "origin=" + origin.latitude + "," + origin.longitude;
// Destination of route
String str_dest = "destination=" + dest.latitude + "," + dest.longitude;
// Sensor enabled
String sensor = "sensor=false";
String mode = "mode=driving";
String key="AIzaSyDz6HymXsuQbqGJkN70OVzNzNTr3pN9xBY";
// Building the parameters to the web service
String parameters = str_origin + "&" + str_dest + "&" + sensor + "&" + mode+ "&" + key;
// Output format
String output = "json";
// Building the url to the web service
String url = "https://maps.googleapis.com/maps/api/directions/" + output + "?" + parameters;
return url;
}
private String downloadUrl(String strUrl) throws IOException {
String data = "";
InputStream iStream = null;
HttpURLConnection urlConnection = null;
try {
URL url = new URL(strUrl);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.connect();
iStream = urlConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(iStream));
StringBuffer sb = new StringBuffer();
String line = "";
while ((line = br.readLine()) != null) {
sb.append(line);
}
data = sb.toString();
Log.d("downloadUrl", data.toString());
br.close();
} catch (Exception e) {
Log.d("Exception", e.toString());
} finally {
iStream.close();
urlConnection.disconnect();
}
return data;
}
//***************DIRECTION API CLOSE *******************************************************************************************
现在，通常情况下，当我遇到困难时，我至少可以在互联网上找到它。但是，似乎没有关于此的信息（谷歌甚至没有给出任何与WAMP.2相关的结果）。
我想如果webSocket服务器正在使用WAMP.2，必须有一种方法可以连接它们，对吧？如果是这样，为什么很难找到任何关于它的东西呢？
我正在使用的代码：
2018-03-09 14:54:53+0100 [-] Log opened.
2018-03-09 14:54:53+0100 [-] Starting factory
<autobahn.twisted.websocket.WebSocketClientFactory object at 0x000002A461F489B0>
2018-03-09 14:54:53+0100 [-] failing WebSocket opening handshake ('WebSocket connection upgrade failed (400 -ThisserveronlyspeaksWebSocketsubprotocolswamp.2.cbor.batched,wamp.2.cbor,wamp.2.msgpack.batched,wamp.2.msgpack,wamp.2.ubjson.batched,wamp.2.ubjson,wamp.2.json.batched,wamp.2.json)')
2018-03-09 14:54:53+0100 [-] dropping connection to peer tcp4:... with abort=True: WebSocket connection upgrade failed (400 - ThisserveronlyspeaksWebSocketsubprotocolswamp.2.cbor.batched,wamp.2.cbor,wamp.2.msgpack.batched,wamp.2.msgpack,wamp.2.ubjson.batched,wamp.2.ubjson,wamp.2.json.batched,wamp.2.json)
2018-03-09 14:54:53+0100 [-] Stopping factory
<autobahn.twisted.websocket.WebSocketClientFactory object at 0x000002A461F489B0>
2018-03-09 14:55:01+0100 [-] Received SIGINT, shutting down.
2018-03-09 14:55:01+0100 [-] Main loop terminated.
答案 0 :(得分：0)
WAMP是一个位于WebSocket之上的协议，你需要一个实现它的库。
Autobahn | Python会这样做，但您正在尝试与WAMP路由器建立纯WebSocket连接。这自然会失败。
有关如何从Python连接到WAMP路由器的基本示例，请参阅例如https://github.com/crossbario/crossbar-examples/tree/master/hello/python
附注：WAMP v2是http://wamp-proto.org/implementations/中列出的所有实现正在运行的内容。版本1几乎已经被历史书籍所取代。