Recently again in the toss, often visit my blog friends may have appeared on the page 502 error hints, that is tossing CloudFlare CDN unsuccessful tips. In this first thanks to the jar, in his dedication and truth, last night finally successfully use the CloudFlare CDN. Before setting up the CloudFlare CDN 502 Error This problem has not been found, anyway, the ja
constitutes depending on the load value can be based on the computer and run on the software, but generally over 10-20 of the average load may mean that the server is overloaded with different high loads. This is best for your host or this system administrator to check if you are unsure. The origin has a firewall (or rate limiter) that blocks our requestThis is the most common cause of intermittent 522 errors. The key thing to check out initially is-
Make sure you do not have the IP
DemandFirst make sure you have an own domain name, then log in to CloudFlare and add your domain name. Follow the instructions and use the default values given by it. You will have cloudflare to host your domain, so you need to adjust your registration authority settings. If you want to use a subdomain, add a ' a ' record to it. Currently, any IP address is available.Ddclient is a Perl client that updates d
ConceptUsing the BPF (Berkeley Packet filter) toolset combined with the Iptables XT_BPF module enables high-performance packet filtering to address large-scale DDoS attacks. BPF Tools contains a simple set of Python scripts that are used to parse the Pcap file, and others are primarily used to generate BPF bytecode.First, download and install BpftoolsDownload the zip file in Https://github.com/cloudflare/bpftools, or you can download it via git, and t
Investigate how CVE-2015-5477 CloudFlare Virtual DNS protects its users
Last week, ISC released a patch to fix a remote vulnerability in the BIND9 DNS server. This vulnerability causes the server to crash when processing a certain data packet.The announcement indicates that an error occurs when the server processes a TKEY-type query. This error causes assertion fail, which causes the server to crash. Because assertion occurs in the query parsing proc
CloudFlare is the world-famous CDN service provider, its free package is enough to meet the average user. Optimize the load speed of the website, cache the static resources, distribute the content near the local area to protect against the DDoS attack. In short, very good, very honest. But in the celestial many nodes are sealed, its own DNS was sealed, and Google and FB, the same as the end of the people (in fact, we are).
When I looked at CloudFlare
Html5 websocket example, websocket online chat, php websocket instance, html5websocketWebSocket online test tool http://ws.douqq.com/
1. The connection format is ws: // IP/Domain Name: Port (example: ws: // 119.29.3.36: 5354)2. For an intranet test environment, you only need to enter the Intranet IP address and port of the server.3. You can connect to the server
WebSocket Online test Tool http://ws.douqq.com/1. The connection format is ws://ip/domain name: port (example ws://119.29.3.36:5354)2, for the test environment of the intranet, just fill in the service side of the intranet IP and port3. You can connect to the service-side WS address I provided above to test your own clientThis website supports QQ robot to send message, first add robot qq:625789120 as friend Test1. Friend message Format {"type": "1", "
This chapter describes how to use the WebSocket API to control protocols and create applications, and using the existing WebSocket servers provided by http://websocket.org, we can send and receive messages, and create some simple websocket applications. Step-by-step learning to use the WebSocket API, and finally we'll
One, WebSocket and HTTPTransferred from: https://www.cnblogs.com/tohxyblog/p/7112917.htmlWebSocket is the HTML5 (protocol), that is, the HTTP protocol does not change, or it does not matter, but HTTP is not support for persistent connection (long connection, not counting the loop connection)First of all, HTTP has, 1.1 and 1.0 it is called keep-alive , to merge multiple HTTP requests into one, but in Websocket
WebSocket and websocket
1. What is webSocket?
As we all know, the browser supports stateless http. When a user sends a request on the browser side, the server returns a response. This kind of response can be sent only when the user requests continuously. Before html5, to implement a real-time service data retrieval function, you may only need to use the round-rob
(a) WebSocket profileShort Connection : in the traditional HTTP protocol, the client and server side of the communication mode is a short connection, that is, the server side does not maintain a connection with the client, after the message is sent, will disconnect the connection, the next time the client communication, must be established and the server New connection, This is the short connection. In the case of a short link, the client must activel
As we all know, the HTTP protocol is stateless and interacts with the server based on Request/response, which is what we often call the single-mode. However, with the development of the Internet, the two-way communication between the browser and the server is increasing, and the way of long polling to the servers to get the latest data and push effect is becoming more and more satisfying. HTML5 Standard, also provides us with the browser and the service side of the Duplex Communication protocol
Open-source C # implements WebSocket protocol client and server websocket-sharp component parsing,
I haven't written a blog for a long time (at least I feel I haven't written it for a long time). I can't help it. The landlord is also a person who needs to live. I 've been looking for a job for a long time. (People who urge me to write code all day long hope to understand more. I will stick to writing our pr
Two URL schemes of WebSocket protocolNon-encrypted traffic between WS client and serverEncrypted traffic between the WSS client and serverWebSocket secure means that WebSocket connections using Transport Layer Security (SSL) use HTTPS security to secure HTTP connectionsConstructors for 1.WebSocketvar ws = new WebSocket ("ws://www.websocket.org"); 2.
In HTML5 specifications, my favorite Web technology is the rapidly becoming popular WebSocket API. WebSocket provides a popular technology to replace the Ajax technology we have been using over the past few years. This new API provides a method to effectively push messages from the client to the server using simple syntax. Let's take a look at HTML5 WebSocket API
WebSocket and message push, WebSocket message push
In B/S-structured software projects, sometimes the client needs to obtain server messages in real time, but the default HTTP protocol only supports the request response mode. This can simplify the Web server and reduce the burden on the server, the response speed is accelerated because the server does not need to establish a communication link with the clie
Use html5 websocket to implement a chat room.
What is websocket?
The WebSocket protocol is a new protocol introduced by html5. it aims to implement full duplex communication between browsers and servers. Those who read the link above will surely have some knowledge about how low efficiency and high consumption (polling or comet) have been done in the past. In th
First knowledge of WebSocket protocol, first knowledge of websocket1. What is the WebSocket protocol?
RFC6455 is described as follows:
The WebSocket Protocol enables two-way communication between a client running untrusted code in a controlled environment to a remote host that has opted-in to communications from that code. The security model used for this is the
Comments: Use html5 websocket to implement a chat room.
What is websocket?
The WebSocket protocol is a new protocol introduced by html5. it aims to implement full duplex communication between browsers and servers. Those who read the link above will surely have some knowledge about how low efficiency and high consumption (polling or comet) have been done in the pa
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