Home.... | log in.... | Pub my question! | Sign-up....

Check whether HTTP server supports "Range" request header

Hi,

I'm trying to develop a multi-threaded download manager which downloads several parts of the file concurrently using the "Range" HTTP request header field. However, I find that it is possible for servers to ignore that field.

As per HTTP specs, checking the "Accept-Ranges" field doesn't seem to be very reliable. How do I check whether the HTTP server of the URL supports range requests. This is essential for both multi-threaded downloads and pausing and resuming downloads.

[501 byte] By [chasana] at [2007-11-26 20:54:21]

«« how to update?
»» Open CD Rom from Java ?

# 1

I suspect that the only reliable way would be via testing. Second most reliable would be via documentation for the site (but a poor second to the first.)Then once you have the information put it in a configuration file so the app can use it.

jschella at 2007-7-10 2:21:12 >

# 2

Well thanx for that. I finally figured it out. I placed a dummy range request (bytes=0-) then checked the response code for 206.

chasana at 2007-7-10 2:21:12 >

Java programming resources: FAQs, tutorials, compiler and browser download sites, documentation, books lists, IDEs, etc.

Check whether HTTP server supports "Range" request header

Core New Topic

Core Hot Topic

Core

All Classified