Live Mesh Based Ftp Adapter

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LIVE MESH BASED FTP

ADAPTER


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WINDOWSLIVEMESH

Your work computer. Your home laptop. Your Mac.

Your mobile phone. Devices live in multiple places.

But the files you needand the programs that open

themoften dont. Live Mesh changes all that.


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WHATTHEMESHIS

Live Mesh is a data synchronization system from

Microsoft that allows files, folders and other data to

be shared and synchronized across multiple

devices.

Once a folder is set for synchronization, it will be

available in all devices, and any changes made to

the content of the folder will be reflected across all

devices.

Devices in a sync relationship are collectivelyreferred to as a Mesh.


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SYNC

Have your devices working together. Add each

device to your mesh by installing the Live Meshsoftware, and then choose folders to sync.


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SHARE

Live Mesh makes it easy to share your stuff. Invite

others to share a Live Mesh folder and keep it in

sync on everyones devices as files are added or

updated.


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ACCESS

When you sign up for Live Mesh, you automatically

get your own personal Live Desktop--with 5 GB offree storage. Synchronize files to your Live

Desktop, and youll be able to access them using

almost any web browser, even remotely


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THE FTP ADAPTER

Currently, Live Mesh is running on HTTP protocol.

Our objective is to make this service compatible

with FTP.

The adapter will accept FTP requests, convert them

to HTTP, interact with Live Mesh and vice versa.


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BASIC ARCHITECTURE


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BASIC FLOW

Server catches the request from the client.

Interpretation of the request, mapping from FTP to

HTTP request.

Creation of XML document. Serialization into XOP packages.

Send to Live Mesh.

Response is vice versa.


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WHY FTP?The Advantages


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FTP is Faster

Enables Multiple Item Upload in a

Single Request

Increased Security

Expanded User Base


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FTP

It is a file transfer protocol for exchanging andmanipulating files over any TCP-based computer

network such as the Internet.

A FTP client and a FTP server are required.

Two connections are established between the

client and the server. One is for data transfer andother is for the control information.


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FTP uses Port 21 for Control Connection and

Port 20 for Data Connection.

FTP servers by default listen on Port 21 for

incoming connections from FTP clients whichforms the Control stream on which commands

are passed.

The actual file transfer takes place on the Data

Connection.


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FTP


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FTP COMMANDS


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FTP SERVER


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FTP CLIENT


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SOCKETS

Is a software endpoint that establishes bidirectional

communication between a server program and one

or more client programs

Associates the server program with a specific

hardware port on the machine

System.Net.Sockets.TcpClient


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THREADS

Multi-threaded server creates a thread for each

communication it accepts from a client.

A thread is a sequence of instructions that runindependently of the program and of any other

threads.

System.Threading.Thread


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OUTLINE

Server catches FTP request from client

Maps it to corresponding HTTP request

An XML doc is created using ATOM protocol Serialization into XOP

Send to Live Mesh


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ATOM

The name Atom applies to a pair of related

standards.

The Atom Syndication Format is an XML languageused for web feeds, while the Atom Publishing

Protocol (AtomPub or APP) is a simple HTTP-

based protocol for creating and updating web

resources


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ATOM COLLECTIONS

Central concept in protocol a resource that

contains a set of Member Entries

Analogous to folders or directories in a file

system. Each collection has a unique URI

Adding an entry to a collection yields a new

URI

All operations done on URIs with GET,POST, PUT, DELETE


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USE OF HTTP METHODS


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FUNCTIONSAVAILABLE

Discovery

Listing

Create

Read Update

Delete


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DISCOVERY

To discover the location of the collections in an

APP service, the client must request an

Introspection Document.

Client Server

| |

| 1.) GET Introspection |

|--------------------------------------> |

| |

| 2.) Introspection Doc |

|


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POSTINGAN ENTRY

POST /edit/ HTTP/1.1

Host: media.example.org

Content-Type: image/png

Slug: The Beach

Authorization: Basic ZGFmZnk6c2VjZXJldA==

Content-Length: nnn

...binary data...


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XOP

It is an alternate serialization of XML that just happens to

look like a MIME package, with an XML document as the

root part.


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RESPONSE FROM LIVE-MESHSERVERHTTP/1.1 201 Created

Date: Fri, 7 Oct 2005 17:17:11 GMTContent-Length: nnn

Content-Type: application/atom+xml;charset="utf-8"

Location: http://example.org/media/edit/the_beach.atom

The Beach

urn:uuid:1225c695-cfb8-4ebb-aaaa-80da344efa6a

2005-10-07T17:17:08Z

Daffy


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Documents

Live Mesh Based Ftp Adapter