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Sending websocket ping/pong frame from browser
...
TCP does not notify of disconnects when RST/FIN packets were not received. TCP only detects dropped connections when a sender attempts to send on a disconnected connection. Pings are used as heartbeats in many applications an...
Where is Erlang used and why? [closed]
...er. It has to route many messages simultaneously, and handle many a lot of TCP/IP connections.
So we have 2 features:
handle many connections
route messages given some aspects of the message
These are examples where erlang shines.
handle many connections
It is very easy to build scalable non-...
Minimal web server using netcat
...can respond to the request.
A web session should go something like this.
TCP session is established.
Browser Request Header: GET / HTTP/1.1
Browser Request Header: Host: www.google.com
Browser Request Header: \n #Note: Browser is telling Webserver that the request header is complete.
Server Respon...
How to start nginx via different port(other than 80)
...to iptables
vi /etc/sysconfig/iptables
-A INPUT -m state --state NEW -m tcp -p tcp --dport 81 -j ACCEPT
Restart IPtables
service iptables restart;
Restart the nginx server
service nginx restart
Access yr nginx server files on port 81
...
ActiveMQ or RabbitMQ or ZeroMQ or [closed]
...
ZMQ
The socket library that acts as a concurrency framework
Faster than TCP, for clustered products and supercomputing
Carries messages across inproc, IPC, TCP, and multicast
Connect N-to-N via fanout, pubsub, pipeline, request-reply
Asynch I/O for scalable multicore message-passing apps
EagleM...
Vagrant reverse port forwarding?
...ning netstat -lt on vagrant VM and taking a note on the following lines:
tcp 0 0 localhost:52698 *:* LISTEN
tcp6 0 0 ip6-localhost:52698 [::]:* LISTEN
share
...
刘强东“一元年薪”背后的O2O棋局 - 资讯 - 清泛网 - 专注C/C++及内核技术
...探索这一模式，但在未来应该是非排他的平台，在不同的区域和当地最有实力的超市合作(优先考虑永辉门店)。有点类似于阿里投资银泰，以股权合作的方式来探索深度的合作，未来将这一模式平台化、社会化。
刘强东 一元年...
Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
... storage. I must use it to accept 1 million 8-digit decimal numbers over a TCP connection, sort them, and then send the sorted list out over another TCP connection.
...
My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets
... vendor or WebSocket provider.)
Some people have referred to WebSocket as TCP for the Web. Because just like TCP transports higher-level protocols, so does WebSocket, but in a way that's compatible with Web infrastructure.
So while sending JSON (or whatever) messages directly over WebSocket is alw...
What is the difference between an Azure Web Site and an Azure Web Role
...-restricted endpoints (added in Azure SDK 2.3, April 2014)
Support for any TCP/UDP ports (Web Sites are restricted to TCP 80/443)
Web Apps have advantages over Web Roles though:
Near-instant deployment with deployment history / rollbacks
Visual Studio Online, github, local git, ftp, CodePlex, Dr...