Scriptale object unity. HttpRequest.UserAgent (Propiedad) (System.Web) Public string UserAgent { get; } Valor de propiedad Tipo: System.String String userAgent; userAgent = Request.UserAgent; if (userAgent.IndexOf("MSIE 6.0") > -1) { // The browser is Microsoft Internet Explorer Version 6.0. } .NET Framework Compatible con: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0 Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (no se admite el rol Server Core), Windows Server 2008 R2 (se admite el rol Server Core con SP1 o versiones posteriores; no se admite Itanium)
Understanding the Cassandra Data Model. Redis, base de datos NoSQL clave-valor. An Introduction To Cassandra: The Data Model. I'm fairly new to the whole NoSQL game, and one thing I keep hearing is how great Cassandra is.
Built by Facebook and open sourced in 2008, Cassandra is probably the most popular NoSQL implementation: "A massively scalable, decentralized, structured data store". Cassandra takes it's distribution features from Dynamo and the data model from BigTable. Before we look at using Cassandra, we first need to understand the data model. For developers new to Cassandra, coming from a relational database background, the data model can be a bit confusing. Here's a summary of how the Cassandra data model is composed: Column A Column is the most basic element in Cassandra: a simple tuple that contains a name, value and timestamp.
SuperColumnA SuperColumn is a column that stores an associative array of columns. ColumnFamily. Cassandra Data Model. Www.brianfrankcooper.net/pubs/ycsb-v4.pdf. Up and running with cassandra. Cassandra is a hybrid non-relational database in the same class as Google’s BigTable.
It is more featureful than a key/value store like Riak, but supports fewer query types than a document store like MongoDB. Cassandra was started by Facebook and later transferred to the open-source community. It is an ideal runtime database for web-scale domains like social networks. This post is both a tutorial and a “getting started” overview. You will learn about Cassandra’s features, data model, API, and operational requirements—everything you need to know to deploy a Cassandra-backed service. April 28, 2011: post updated for Cassandra gem 0.10 and Cassandra version 0.7. features There are a number of reasons to choose Cassandra for your website. Flexible schema: with Cassandra, like a document store, you don’t have to decide what fields you need in your records ahead of time. Some other features that help put Cassandra above the competition : installation You need a Unix system. It runs! Live demo irb. Cassandra vs MongoDB vs CouchDB vs Redis vs Riak vs HBase comparison.
(Yes it's a long title, since people kept asking me to write about this and that too :) I do when it has a point.)
While SQL databases are insanely useful tools, their monopoly in the last decades is coming to an end. And it's just time: I can't even count the things that were forced into relational databases, but never really fitted them. (That being said, relational databases will always be the best for the stuff that has relations.) But, the differences between NoSQL databases are much bigger than ever was between one SQL database and another. This means that it is a bigger responsibility on software architects to choose the appropriate one for a project right at the beginning.
New Technologies To Help Make Your Web Services More Secure. WS-Security New Technologies Help You Make Your Web Services More Secure David Chappell This article assumes you're familiar with XML and Security Basics Level of Difficulty 1 2 3 Without good security, Web Services will never reach their potential.
Web Services without effective security aren't very useful. From one perspective, the task facing the creators of Web Services security looks simple. Taken as a group, these specs lay the foundation for a usable, interoperable, and quite complete approach to providing security for Web Services. The fundamental technology for adding security to SOAP is defined by WS-Security. Perhaps the most fundamental thing WS-Security defines is a <Security> element that lives inside the SOAP header. <? WS-Security describes how to attain integrity, which allows a receiver to be sure that data it receives in a message was not modified in transit, and confidentiality, which ensures that data can't be read in transit. Sending Security Tokens Integrity <? Live Chart Playground - Image Charts (Deprecated)