c# - Sending messages from UWP to socket.io -


i have simple node socket.io server , c# uwp app. want send simple messages app server, seems message not in right format/protocol/something. tried formatting correct, don't know how it.

app.js

io.on('connection', function(socket){   console.log('client connected')    socket.on('message', function (msg) {     console.log('socket msg')     console.log(msg) }

when fire message socket.io tester, console shows 

socket msg dwadwadwada

(just should be)

debug output:

 engine:socket packet +1ms   socket.io-parser decoded 2["message","dwadwadwada"] {"type":2,"nsp":"/","data":["message","dwadwadwada"]} +0ms   socket.io:socket got packet {"type":2,"nsp":"/","data":["message","dwadwadwada"]} +0ms   socket.io:socket emitting event ["message","dwadwadwada"] +0ms   socket.io:socket dispatching event ["message","dwadwadwada"] +0ms

now if send string uwp app (removed try/catches , exception handling brevity)

string msg = "test"; await sendmessage(msg);  private async task sendmessage(string message) {     this.socket = new messagewebsocket();     socket.control.messagetype = socketmessagetype.utf8;     socket.messagereceived += socketmsgreceived;     await this.socket.connectasync(uri);     debug.writeline("connected " + uri);      datawriter messagewriter = new datawriter(socket.outputstream);      messagewriter.writestring(message);     await messagewriter.storeasync(); }

, message sent (no errors) , server seems something, not recognized message.

 engine:ws received "test" +6s   engine:socket packet +1ms   engine:ws closing +1ms   socket.io:client client close reason parse error +0ms   socket.io:socket closing socket - reason parse error +1ms

i tried formatting message {message = "test"} or 42["message","test"] no effect, though latter @ least gave me

  engine:ws received "42["message" = "test"]" +4s   engine:socket packet +0ms   socket.io-parser decoded 2["message" = "test"] {"type":4,"data":"parser error"} +0ms   socket.io:client no socket namespace undefined +1ms

i'm pretty sure easy fix, can't find out how it.. have convert special type? jsonify somehow? don't want fancy stuff, sending 

{message: "hi"}

or maybe (after first 1 works)

{message: {text: "hi", additionalstuff: "ho"}}

i'd appreciate :) thanks!

i found out problem...

i had build websocket string hand, (how noticed) socket.io not same websockets, wrapper.

so had build json string scratch info here.

my final string looked like

 "42[\"mess\"," +  "{\"id\": \"" + id + "\", " +  "\"name\": \"" + name + "\"}]";

with lot of escaped quotes... didn't understand why it's 42 instead of "4" docs message, found out that's sent, used (it works)

the above message parsed by

socket.on('mess', function(msg) {     console.log(msg)  }

as

{id: blah, name: bleh}

Comments

Post a Comment

Popular posts from this blog

python - Operations inside variables -

this question has answer here: evaluating mathematical expression in string 12 answers i want make python script finds maximum possible output using 2 operations. problem says there syntax error @ 2nd last line, in b in there. how can fix it? x = 0 = int(input("1st number:")) c = int(input("2nd number:" )) e = int(input("3rd number:" )) in range(4): if == 0: b = "+" elif == 1: b = "-" elif == 2: b = "/" else: b = "*" j in range(4): if j == 0: d = "+" elif j == 1: d = "-" elif j == 2: d = "/" else: d = "*" k = b c d e print(k) if you're after variables e on single line, couldn...
Read more

Generic Map Parameter java -

i having lot of methods of type: public static list<eduusers> getdetails(class c, map<string, integer> params) { list<eduusers> details = null; session session = hibernateutil.getsessionfactory().opensession(); transaction tx = null; try { tx = session.begintransaction(); criteria cr = session.createcriteria(c); (map.entry<string, integer> entry : params.entryset()) { cr.add(restrictions.eq(entry.getkey(), entry.getvalue())); } details = cr.list(); tx.commit(); } catch (exception asd) { log.debug(asd.getmessage()); if (tx != null) { tx.commit(); } } { session.close(); } return details; } i trying have generic method them , have written far: public static <t> list<t> getdetails(class<t> c, class<t> b) { l...
Read more

arrays - What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it? -

what arrayindexoutofboundsexception mean , how rid of it? here code sample triggers exception: string[] name = {"tom", "dick", "harry"}; for(int = 0; i<=name.length; i++) { system.out.print(name[i] +'\n'); } your first port of call should documentation explains reasonably clearly: thrown indicate array has been accessed illegal index. index either negative or greater or equal size of array. so example: int[] array = new int[5]; int boom = array[10]; // throws exception as how avoid it... um, don't that. careful array indexes. one problem people run thinking arrays 1-indexed, e.g. int[] array = new int[5]; // ... populate array here ... (int index = 1; index <= array.length; index++) { system.out.println(array[index]); } that miss out first element (index 0) , throw exception when index 5. valid indexes here 0-4 inclusive. correct, idiomatic for statement here be: for (int index = 0; index <...
Read more