Re: FTP from one website to another?
- From: "clintonG" <csgallagher@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Fri, 23 Jun 2006 19:17:02 -0500
Hello Kevin,
Thanks for the smedumacation ;-) I've never written any code that used FTP.
The concern here is ease of use and trying to provide a seamless transition
for a user on websiteA who will be using an application on websiteA that
will output an XML file that needs to be located somewhere under the root of
the user's website that I refer to as websiteB.
When the application on websiteA that generates the XML file is finished
doing so the application will ask the user if they want to see the XML file
in the browser to allow them to copy-paste or use File Save As to save to
their local file system. If they want to use a local instance of FTP to
transport the file to their website (websiteB) so be it -- or -- if
possible -- the application will ask the user to select a means to login to
websiteB from websiteA and use the application running on websiteA to
transport the file to websiteB.
I've never gotten close to any task like this. Is it clear as mud?
<%= Clinton
"Kevin Spencer" <uce@xxxxxxx> wrote in message
news:%23B9hZwulGHA.2204@xxxxxxxxxxxxxxxxxxxxxxx
Hi Clinton,
Yes, under the correct circumstances. Forgive me if I tell you anything
you already know, as I don't know what you already know, so I'm going to
start at a comfortably low position and work my way up from there...
A web application is an application designed to run in a web server. A web
server is a server application that communicates with its clients via HTTP
(HyperText Transfer Protocol). This is a text-based messaging protocol
which runs on a TCP transport over the Internet, which sends text messages
back and forth between client and server, and can also be used to transmit
binary data as well.
FTP (File Transfer Protocol) is another text-based protocol that runs on a
TCP transport over the Internet. It also involves a server (an FTP server)
and multiple clients, which transmit requests and responses in text
format, and can be used to transmit both text and binary data between
server and client.
There are several differences between these 2 protocols. FTP is a
"connected" protocol. It maintains an open connection between the client
and the server (on the server port 21 usually) for the duration of a user
session. This "command connection" is used to exchange the requests and
responses between server and client, and separate connections are created
on different ports as needed to transfer files. HTTP is a "disconnected"
protocol, which can be configured to keep the underlying TCP connection
opened, or close it and reopen it with each request/response. Because of
the "disconnected" nature of HTTP, it is stateless. It only uses a single
port (usually Port 80) to transfer all messaging and data. FTP is older
than HTTP, and has several issues with firewalls and security that HTTP
does not, but both are generally pretty reliable, as TCP is a reliable
networking protocol. They use entirely different text "languages" to
communicate. And of course, although it is theoretically possible to
create an FTP client that can render HTML, and use FTP as the underlying
protocol, FTP is not used for this purpose, and is generally regarded as
simply a mechanism for transferring files 2 ways between client and
server, whilt HTTP is generally regarded as a one-way protocol in which
the client is generally only receiving files from the server.
Enough of that. Now down to the nitty gritty of what you were asking. Both
protocols require a server to listen and handle incoming client requests.
Both protocols can run on the same machine, and can work with the same
directories. So, it is quite possible, and even common for an HTTP web to
have FTP access. Many web designers use FTP to upload their files to the
web server. So, the only real question you need to ask is, does the web
server machine have an FTP server with access to the same files and
folders as the web site? If so, an application can use both FTP and HTTP
to exchange data and files between server and client.
--
HTH,
Kevin Spencer
Microsoft MVP
Professional Chicken Salad Alchemist
I recycle.
I send everything back to the planet it came from.
"clintonG" <csgallagher@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:%23zGox$slGHA.3588@xxxxxxxxxxxxxxxxxxxxxxx
I'm puzzled and don't think this is possible but if an application that
is running on websiteA generates a file can FTP be used from websiteA to
transfer that file to websiteB which would be located on another server?
--
<%= Clinton Gallagher
NET csgallagher AT metromilwaukee.com
URL http://www.metromilwaukee.com/clintongallagher/
.
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