RanchiMall/SuperNodeStorage
3
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Supernode status detection

Browse Source
This commit is contained in:
sairajzero 2019-11-02 01:55:13 +05:30
parent fd0d0b11a9
commit 5e6d47a042
2 changed files with 131 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

128
index.html
View File

@ -5226,6 +5226,53 @@
}
});
},
getPrevSupernode: function(flo_addr, n = 1, KB = this.supernodeKBucket){
return new Promise((resolve, reject) => {
try {
let isFloIdUint8 = flo_addr instanceof Uint8Array;
if (!isFloIdUint8)
flo_addr = this.floIdToKbucketId(flo_addr);
const KA = KB.toArray();
let pos = KA.indexOf(flo_addr)
var prevSupernode = []
for(var i = 0; i < n; i++){
if(pos - i < 0)
var prev = pos - i + KA.length
else
var prev = pos - i
prevSupernode.push(KA[prev])
}
resolve(prevSupernode);
} catch (error) {
reject(error);
}
});
},
getNextSupernode: function(flo_addr, n = 1, KB = this.supernodeKBucket){
return new Promise((resolve, reject) => {
try {
let isFloIdUint8 = flo_addr instanceof Uint8Array;
if (!isFloIdUint8)
flo_addr = this.floIdToKbucketId(flo_addr);
const KA = KB.toArray();
let pos = KA.indexOf(flo_addr)
var nextSupernode = []
for(var i = 0; i < n; i++){
if(pos + i >= KA.length)
var next = pos + i - KA.length
else
var next = pos + i
nextSupernode.push(KA[next])
}
resolve(nextSupernode);
} catch (error) {
reject(error);
}
});
},
determineClosestSupernode: function (flo_addr, n = 1, KB = this.supernodeKBucket) {
return new Promise((resolve, reject) => {
try {
@ -5376,10 +5423,9 @@
try {
data = JSON.parse(data)
floSupernode.kBucket.determineClosestSupernode(data.receiverID).then(result => {
if (result[0].floID != myFloID)
return;
if (data.senderID == floCrypto.getFloIDfromPubkeyHex(data.pubKey) && floCrypto.verifySign(
JSON.stringify(data.message), data.sign, data.pubKey)) {
if (result[0].floID == myFloID
&& data.senderID == floCrypto.getFloIDfromPubkeyHex(data.pubKey)
&& floCrypto.verifySign(JSON.stringify(data.message), data.sign, data.pubKey)){
if (floGlobals.storageList.includes(data.application))
var table = data.application;
else
@ -6047,7 +6093,81 @@
}).catch(error => reject(error))
})
}
function connectToBackupSupernode(){
return new Promise((resolve,reject) => {
floSupernode.kBucket.getNextSupernode(myFloID).then(backupNodeID => {
reactor.dispatchEvent("initate_backup_websocket",backupNodeID)
}).catch(error => reactor.dispatchEvent)
})
}
</script>
<script>
//Reactor Events
reactor.registerEvent("initate_backup_websocket");
reactor.addEventListener("initate_backup_websocket", function (backupNodeID) {
console.log("initate_backup_websocket");
floGlobals.backupNode = {
floID: backupNodeID,
wsConn: new WebSocket("wss://" + floGlobals.supernodes[backupNodeID].uri + "/ws")
}
floGlobals.backupNode.wsConn.onopen = (evt) => reactor.dispatchEvent("backup_node_connected",evt);
floGlobals.backupNode.wsConn.onmessage = (evt) => reactor.dispatchEvent("backup_node_message",evt);
floGlobals.backupNode.wsConn.onclose = (evt) => reactor.dispatchEvent("backup_node_disconnected",evt);
floGlobals.backupNode.wsConn.onerror = (evt) => reactor.dispatchEvent("backup_node_error",evt);
})
reactor.registerEvent("backup_node_connected");
reactor.addEventListener("backup_node_connected", function (event) {
console.log("backup_node_connected");
//do nothing, wait for supernode response
})
reactor.registerEvent("backup_node_message");
reactor.addEventListener("backup_node_message", function (event) {
console.log("backup_node_message");
//received message from backup node
if(event.data == "$+")
reactor.dispatchEvent("backup_node_online",null);
else if (event.data == "$-")
reactor.dispatchEvent("backup_node_offline",null);
else
console.log(event.data)
})
reactor.registerEvent("backup_node_disconnected");
reactor.addEventListener("backup_node_disconnected", function (event) {
console.log("backup_node_disconnected");
//try to reconnect (usually disconnects due to timeout)
reactor.dispatchEvent("initate_backup_websocket",floGlobals.backupNode.floID)
})
reactor.registerEvent("backup_node_error");
reactor.addEventListener("backup_node_error", function (event) {
console.log("backup_node_error");
//backup node server not found
reactor.dispatchEvent("backup_node_offline",backupNodeID)
})
reactor.registerEvent("backup_node_online");
reactor.addEventListener("backup_node_online", function (event) {
console.log("backup_node_online");
//backup node is alive.
//send message to backup's backup to stop serving
//delete self farest backup
//send backup data to backup node
})
reactor.registerEvent("backup_node_offline");
reactor.addEventListener("backup_node_offline", function (event) {
console.log("backup_node_offline");
//backup node is offline.
//send message to backup's backup to server for backup node
//make another new backup of self
})
</script>
</body>
</html>

7
util/websocket.c
View File

@ -94,6 +94,10 @@ static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
case MG_EV_WEBSOCKET_HANDSHAKE_DONE: {
/*New websocket connection*/
display(nc, "+Connected+");
if(supernode_client!=NULL)
unicast(nc, mg_mk_str("$+"));
else
unicast(nc, mg_mk_str("$-"));
break;
}
case MG_EV_WEBSOCKET_FRAME: {
@ -106,6 +110,8 @@ static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
if(!strcmp(pass,server_pwd)){
if(supernode_client!=NULL)
unicast(supernode_client,mg_mk_str("$Another login is encountered! Please close/refresh this window"));
else
broadcast(nc, mg_mk_str("$+"));
supernode_client = nc;
unicast(supernode_client,mg_mk_str("$Access Granted!"));
display(nc, "*Became SuperNode*");
@ -129,6 +135,7 @@ static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
if(nc == supernode_client){
supernode_client = NULL;
display(nc,"!SuperNode Disconnected!");
broadcast(nc, mg_mk_str("$-"));
}else
display(nc, "-Disconnected-");
break;