HomeWeb Host中文AboutStudy BlogMy Study Bloghtml5 websocket api data framing in c#Posted on | October 18, 2011 | No Commentsworking on the latest html5 websocket api and developing a html5 websocket server in c#. i spent some time on processing the data frame passed in from the browser in c#. just share it here so someone else might save some time and also might give some thoughts to improve it.some background.the latest Websocket IETF draft is draft 17 http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17 (websocket version 8 )the draft you can play with is draft 10  http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-10 (websocket version 8 ) which is build in browser: chrome 14, firefox 7 and IE10 developer preview.so, to test your websocket server with those brosers, your server better be able to process draft 10 requests(handshake).when client sends in data or message, the message itself must contain additional framing information so the the server knows how to parse the message. This information typically takes one of the following forms: Delimiter and Explicit length.in draft 10, data stream passed in from the client used Explicit length method. (The variable-length field or message is preceded by a (fixed-size) length field that tells how many bytes it contains.) refer to http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-10#page-24 for detailed description.my little websocket server will deal with 1 frame masked text data.you might want to download this pdf to get a better understanding of the first few bytes in a message.Read moreCategory: UncategorizedBlock IP address or IP range in windows server 2008 by Windows FirewallPosted on | October 4, 2011 | 1 CommentHow to Block IP address or IP range in windows server 2008 by Windows FirewallIf you ever feel that someone may be trying to break into your server or know an IP address that you want to block from accessing your server there is a built in firewall on all windows server. You can use this firewall to block either a range of IP addresses or a single address. My server has some suspicious visits, so i decide to block these users.1. Log into your server via Remote Desktop Connection.2. Start -> administrative tools > windows firewall with advanced security.3. On the left side of the firewall window click on the inbound rules option.4. On the right side of the screen click on New Rule.5. Click on the custom radio button and then click next.Read moreCategory: windows serverNameValueCollection VS DictionaryPosted on | January 6, 2011 | No CommentsYou are considering the NameValueCollection type in the C# programming language. This collection is found in System.Collections.Specialized, and provides a way to map one key to multiple values without custom code. Here we see several examples on NameValueCollection, and then go further and review its use in ASP.NET and benchmark it.=== NameValueCollection benchmark ===NameValueCollection lookup: 2768 ms