Seeks algorithms for downloading file from WWW
I have a big question for how many different ways for me to download file from WWW.
Can someone list those methods and the "Java offical" classes/libraries that needed?
Also which is the BEST and most EFFICIENCY?
Here are some methods:
1a. Download from html [bytes by bytes]
- Create a connection to the url (use Url)
- While not EOF
- Read the file (use BufferedReader)
- Write to another file (use BufferedWriter)
- Close all connection
1b. Download from html [line by line]
- Create a connection to the url (use Url)
- While not EOF
- Read the file line by line (use BufferedReader)
- Write to another file (use FileWriter)
- Close all connection
Can someone tell me which class I can use to monitor the connection? (i.e. the file size, connection speed, time required, size downloaded, etc)
Can someone tell me how I can compress the data before downloading it from the web just like those download managers?
Can someone tell me how I can divide the file as those download managers do?
Thx
[1120 byte] By [
salmon739a] at [2007-9-29 0:12:55]
> I have a big question for how many different ways for
> me to download file from WWW.
> Can someone list those methods and the "Java offical"
> classes/libraries that needed?
Most of your questions are answered in the Custom Networking tutorial, in particular this page here:
http://java.sun.com/docs/books/tutorial/networking/urls/readingURL.html
> Also which is the BEST and most EFFICIENCY?
It depends on a lot of things, particularly on the speed of your network connection.
> Can someone tell me which class I can use to monitor
> the connection? (i.e. the file size, connection speed,
> time required, size downloaded, etc)
There's a tutorial about input and output there too.
> Can someone tell me how I can compress the data before
> downloading it from the web just like those download
> managers?
You can't do anything to the file before it gets to your side of the connection. You must be mistaken about the capabilities of those download managers.
> Can someone tell me how I can divide the file as those
> download managers do?
Not me.
thx DrClap ^^
In fact I just want to know is there any method have the best effort and the lowest workload, also with the highest speed.
And I ste\ill want to know more about Connection Managment stuffs.
e.g.
-monitoring: connection speed, file size...
-data compression <== made be it has been done by the modems.
-file dividing + resume suppout
-connection speed control (e.g. I only want the download use 1/2 of the brandwidth)
Cause I want a write a programable download manager ^_^
