Hi Anas,
a web application is supposed to answer incoming requests
from its clients. Usually the client send a request in terms of GET or
POST http messages.
The GET is supposed to let the client retrieve a remote resource
(usually a file of whatever type [html, jpg, doc, ...]).
The POST is for the same purposes, but it intended as the way for
UPDATING the remote contents, so, while the GET just retrieve
informations and not affect the status of the remote application, the
POST is supposed to update it, for example updating a database.
In this sense the POST is designed in such a way that you can attach a
virtually unlimited number of parameters of any size, so you can send
even files along with the POST request.
This is the way a client can upload a file to a remote application. Up
to the remote application to manage and store the file locally.
This is only the initial conceptual idea from these types of requests
were born, as far as I read somewhere, maybe in the HTTP
specifications.
The PUT message, instead, is supposed to send a resource to the remote
application directly, but as far as I know is not used, as the POST is
more versatile because it's intended to send more than one parameter.
Please, this is only a rough memory I have, but I suggest to have a
look here if you need further informations:
http://www.ietf.org/internet-drafts/draft-ietf-httpbis-p2-semantics-05.txt
Anyway
On 10 Feb, 06:20, Anas <anas.ahmed.elsal...@gmail.com> wrote:
> hi there
> why this course not explain the use of doPut() method?
> i read in some where else that i can program uploader by this
> method ???
> can anyone help me with this ?
> any useful links please?
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