Re: LYNX-DEV Download recovery for lynx?

[Jacob Poon]

On Sun, 10 Aug 1997, Klaus Weide wrote:

> 2. One problem for lynx is, how should it keep track of partially received
>    files across sessions and which already partially received file from a
>    previous session corresponds to which URL?  Remember that downloaded
>    files first go into a session-specific temp file which will be removed
>    (at the latest when Lynx exits).

My suggestion is to use what Zmodem has done over the years:  If the
filename matches the existing ones, request the foreign host to send a
packet, starting from byte (size_of_local_file - packet_size), and compare
the packet to the local file.  If the content matches the end of the local
file, append the existing file at the client side.  Otherwise send entire
file from the beginning. 

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