For every data transmission, a new data channel is established.Īn FTP connection can be either active or passive. This channel is temporary in nature-once the data transfer completes, the channel is disconnected. The data channel is used to transmit data to and from the FTP server. The command channel remains open until the client disconnects, a connection-idle timeout takes place, or an error occurs in the FTP server or command channel. The command channel is created when a client connects to an FTP server, and it’s used to transmit all commands and responses to and from the FTP server. FTP ChannelsįTP consists of two channels, a command channel and a data channel. Note that the feature I’m going to discuss is not a Microsoft implementation and may not necessarily be approved. I’m not going to describe every feature and command of FTP, but I hope to provide a head start to help you create your own FTP implementation. RFC 959 describes the specification, its functionality and architecture, and its commands with their responses. FTP is a well-established, well-documented protocol (see RFC 959 at bit.ly/fB5ezA). This article is about providing support for FTP on Windows Phone 8 by creating an FTP library and a simple FTP client application that will run on a Windows Phone device. From an enterprise perspective, this makes it rather difficult for employees to access files over their phones. One feature that’s still missing in Windows Phone is support for FTP-there are no direct APIs available for leveraging FTP services in a Windows Store app. However, in Windows Phone (as well as Windows 8), it may be up to the developer to provide his own implementation of a service. The addition of socket support in Windows Phone enabled the devices to communicate with a multitude of different services, making users feel more connected and available than ever. But if you want to have direct control of your files while providing easy access to them, FTP can still be the way to go. With all the emphasis on the cloud, it might seem counterintuitive today to continue to rely on FTP. It’s used to hand off files to clients, to distribute installation files to consumers, to provide access to otherwise inaccessible parts of the file system for security reasons in enterprise environments, and for a host of other scenarios. Volume 28 Number 9 Windows Phone - Adding FTP Support in Windows Phone 8įTP is one of the most widely used protocols for sharing files.
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