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Implement ChainedTunnel, which wraps an arbitrary list of tunnels, using each in order if a tunnel fails.

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This commit is contained in:
Michael Jumper
2012-03-09 15:53:54 -08:00
parent 862ad8760a
commit 90876a47d6
1 changed files with 96 additions and 0 deletions
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96
guacamole-common-js/src/main/resources/tunnel.js
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@@ -464,6 +464,20 @@ Guacamole.WebSocketTunnel = function(tunnelURL) {
"https:": "wss:"
};
var status_code = {
1000: "Connection closed normally.",
1001: "Connection shut down.",
1002: "Protocol error.",
1003: "Invalid data.",
1004: "[UNKNOWN, RESERVED]",
1005: "No status code present.",
1006: "Connection closed abnormally.",
1007: "Inconsistent data type.",
1008: "Policy violation.",
1009: "Message too large.",
1010: "Extension negotiation failed."
};
var STATE_IDLE = 0;
var STATE_CONNECTED = 1;
var STATE_DISCONNECTED = 2;
@@ -548,6 +562,14 @@ Guacamole.WebSocketTunnel = function(tunnelURL) {
currentState = STATE_CONNECTED;
};
socket.onclose = function(event) {
// If connection closed abnormally, signal error.
if (event.code != 1000 && tunnel.onerror)
tunnel.onerror(status_code[event.code]);
};
socket.onerror = function(event) {
// Call error handler
@@ -625,3 +647,77 @@ Guacamole.WebSocketTunnel = function(tunnelURL) {
Guacamole.WebSocketTunnel.prototype = new Guacamole.Tunnel();
Guacamole.ChainedTunnel = function() {
var chained_tunnel = this;
var current_tunnel = null;
var connect_data;
var tunnels = [];
// Load all tunnels into array
for (var i=0; i<arguments.length; i++)
tunnels.push(arguments[i]);
/**
* Sets the current tunnel
*/
function attach(tunnel) {
// Set own functions to tunnel's functions
chained_tunnel.disconnect = tunnel.disconnect;
chained_tunnel.sendMessage = tunnel.sendMessage;
// Record current tunnel
current_tunnel = tunnel;
// Wrap own oninstruction within current tunnel
current_tunnel.oninstruction = function(opcode, elements) {
chained_tunnel.oninstruction(opcode, elements);
}
// Attach next tunnel on error
current_tunnel.onerror = function(message) {
// Get next tunnel
var next_tunnel = tunnels.shift();
// If there IS a next tunnel, try using it.
if (next_tunnel)
attach(next_tunnel);
// Otherwise, call error handler
else if (chained_tunnel.onerror)
chained_tunnel.onerror(message);
};
// Attempt connection
current_tunnel.connect(connect_data);
}
this.connect = function(data) {
// Remember connect data
connect_data = data;
// Get first tunnel
var next_tunnel = tunnels.shift();
// Attach first tunnel
if (next_tunnel)
attach(next_tunnel);
// If there IS no first tunnel, error
else if (chained_tunnel.onerror)
chained_tunnel.onerror("No tunnels to try.");
};
this.onerror = null;
};
Guacamole.ChainedTunnel.prototype = new Guacamole.Tunnel();