Ich entwickle seit einiger Zeit ein browserbasiertes Multiplayer-Spiel und teste die Zugänglichkeit verschiedener Ports in verschiedenen Umgebungen (Büro des Kunden, öffentliches WLAN usw.). Alles läuft ganz gut, bis auf eines: Ich kann nicht herausfinden, wie man Fehler Nr. 1 liest. oder Beschreibung, wenn ein Fehlerereignis empfangen wird.
Der Client-Websocket wird in Javascript erstellt.
Zum Beispiel:
// Init of websocket
websocket = new WebSocket(wsUri);
websocket.onerror = OnSocketError;
...etc...
// Handler for onerror:
function OnSocketError(ev)
{
output("Socket error: " + ev.data);
}
'output' ist nur eine Utility-Funktion, die in ein div schreibt.
Was ich bekomme, ist für ev.data 'undefiniert'. Immer. Ich habe herum gegoogelt, aber es scheint, dass es keine Angaben darüber gibt, welche Parameter dieses Ereignis hat und wie man es richtig liest.
Jede Hilfe wird geschätzt!
javascript
html
websocket
Sinisa
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Antworten:
Der Fehler,
Event
den deronerror
Handler erhält, ist ein einfaches Ereignis, das solche Informationen nicht enthält :Möglicherweise haben Sie mehr Glück beim Abhören des
close
Ereignisses, bei dem esCloseEvent
sich um eineCloseEvent.code
Eigenschaft handelt, die einen numerischen Code gemäß RFC 6455 11.7 und eineCloseEvent.reason
Zeichenfolgeeigenschaft enthält.Bitte beachten Sie jedoch, dass
CloseEvent.code
(undCloseEvent.reason
) so begrenzt sind , dass Netzwerkprüfungen und andere Sicherheitsprobleme vermieden werden.quelle
Neben Nmaiers Antwort erhalten Sie, wie er sagte , immer den Code 1006 . Wenn Sie jedoch theoretisch andere Codes erhalten sollten, finden Sie hier einen Code zur Anzeige der Ergebnisse (über RFC6455 ).
Sie werden diese Codes in der Praxis fast nie bekommen, daher ist dieser Code ziemlich sinnlos
var websocket; if ("WebSocket" in window) { websocket = new WebSocket("ws://yourDomainNameHere.org/"); websocket.onopen = function (event) { $("#thingsThatHappened").html($("#thingsThatHappened").html() + "<br />" + "The connection was opened"); }; websocket.onclose = function (event) { var reason; alert(event.code); // See http://tools.ietf.org/html/rfc6455#section-7.4.1 if (event.code == 1000) reason = "Normal closure, meaning that the purpose for which the connection was established has been fulfilled."; else if(event.code == 1001) reason = "An endpoint is \"going away\", such as a server going down or a browser having navigated away from a page."; else if(event.code == 1002) reason = "An endpoint is terminating the connection due to a protocol error"; else if(event.code == 1003) reason = "An endpoint is terminating the connection because it has received a type of data it cannot accept (e.g., an endpoint that understands only text data MAY send this if it receives a binary message)."; else if(event.code == 1004) reason = "Reserved. The specific meaning might be defined in the future."; else if(event.code == 1005) reason = "No status code was actually present."; else if(event.code == 1006) reason = "The connection was closed abnormally, e.g., without sending or receiving a Close control frame"; else if(event.code == 1007) reason = "An endpoint is terminating the connection because it has received data within a message that was not consistent with the type of the message (e.g., non-UTF-8 [http://tools.ietf.org/html/rfc3629] data within a text message)."; else if(event.code == 1008) reason = "An endpoint is terminating the connection because it has received a message that \"violates its policy\". This reason is given either if there is no other sutible reason, or if there is a need to hide specific details about the policy."; else if(event.code == 1009) reason = "An endpoint is terminating the connection because it has received a message that is too big for it to process."; else if(event.code == 1010) // Note that this status code is not used by the server, because it can fail the WebSocket handshake instead. reason = "An endpoint (client) is terminating the connection because it has expected the server to negotiate one or more extension, but the server didn't return them in the response message of the WebSocket handshake. <br /> Specifically, the extensions that are needed are: " + event.reason; else if(event.code == 1011) reason = "A server is terminating the connection because it encountered an unexpected condition that prevented it from fulfilling the request."; else if(event.code == 1015) reason = "The connection was closed due to a failure to perform a TLS handshake (e.g., the server certificate can't be verified)."; else reason = "Unknown reason"; $("#thingsThatHappened").html($("#thingsThatHappened").html() + "<br />" + "The connection was closed for reason: " + reason); }; websocket.onmessage = function (event) { $("#thingsThatHappened").html($("#thingsThatHappened").html() + "<br />" + "New message arrived: " + event.data); }; websocket.onerror = function (event) { $("#thingsThatHappened").html($("#thingsThatHappened").html() + "<br />" + "There was an error with your websocket."); }; } else { alert("Websocket is not supported by your browser"); return; } websocket.send("Yo wazzup"); websocket.close();
Siehe http://jsfiddle.net/gr0bhrqr/
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