Re: How i can get information about the downloading process?

[Michael Becke]

Hi Gaspar,
HttpClient does not support timing directly.  There is no built-in way 
to get status on the request progress.  As Chris has described the only 
real timing that can be done is with the response body.

Mike
On Nov 15, 2004, at 11:14 PM, Gaspar wrote:
Hi Chris,
First of all, thanks for your explanation, but maybe i don't explain 
very
well what is my problem. Yes i know that this is the way to obtain this
information, but how you can did the algorithm that you describe if 
the code
line (see below the number 1) don't return until it finish the download
process completely. do you understand now my doubt?. Maybe using
multithreading i can resolve this problem, but can i only resolve it 
using
multithreading only?

thanks in advance,
Gaspar
Here is the code, see the line 1), is what i use to download the file.
...
HttpMethod method = new GetMethod(getURL().toString());
...
// start the download process
line 1) statusCode = client.executeMethod(method);
----- Original Message -----
From: "Chris Brown" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, November 07, 2004 1:00 AM
Subject: RE: How i can get information about the downloading process?

Hi Gaspar,
If you use some of the approaches that let HTTPClient do all the hard 
work
for you, you'll not have this feedback as far as I'm aware.

But it's quite simple to get this information yourself.  If you open 
the
connection and read data as a stream, you need to remember :

* the time (e.g. System.currentTimeMillis()) you started as a "long"
variable
* the total number of bytes so far read as a "long" variable, updated 
each
time you read some bytes from the stream

* you can determine the average speed so far by dividing the number of
bytes
downloaded by the time taken so far (see both points above); that's 
not
necessarily your current speed

* for the percentage remaining, you'll need to know in advance the 
size of
what you're going to download (the HTTP response header 
"Content-Length"
should help here, but you're not always going to get this 
information, and
it's not always provided correctly by the server).

You'll want multithreading no doubt, so make your "download" object 
expose

this information through "getter" methods.  You can then display this 
on
the
command line, in a progress bar, or whatever.
- Chris

From: "Gaspar" <[EMAIL PROTECTED]>
Reply-To: "HttpClient Project" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Subject: How i can get information about the downloading process?
Date: Sat, 6 Nov 2004 16:08:35 -0800
Hi,
My question is about how i can do with HttpClient, something that i 
see
on
many download manager software.
About the file that i'm downloading using HttpClient i want to get 
this
information:

- % of the file that is downloaded already.
- the size of what is downloaded already.
- the speed rate(b/s) of what is downloading.
- the time left to finish the download process.
the downlaod manager that i use is ReGet Deluxe 3.3 and i want do
something
similar with HttpClient.
Thanks in advance,
Gaspar

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