HttpWebRequest AddRange Method Query

Question

In HttpWebRequest AddRange method, we can specify the range of byte to download. What I want to know is how to specify my range from a certain offset upto the end of file.

Like if we don't know the length of the file, we can specify like this in the Request Header string

"Range: bytes = 0 - " This means, starting from the first byte upto the end of file.

But using the method AddRange, how to specify this with one offset value to the EOF??

I know I can get the content length and specify like this, AddRange(0, ContentLength). But I am asking if there is any way to get the contents upto EOF from a certain 'offset' value.

Answer 1

You use a positive value to the AddRange method to get bytes from the offset to the end of entity;

 request.AddRange(10)

Tells the server to return all bytes except the first 10.

You can use a negative value, which is the ending point;

 request.AddRange(-10)

Tells server to return bytes 0 to 10.