On 6/9/07, Stut <stuttle@xxxxxxxxx> wrote:
Tijnema wrote: > On 6/9/07, Stut <stuttle@xxxxxxxxx> wrote: >> Tijnema wrote: >> > On 6/9/07, Stut <stuttle@xxxxxxxxx> wrote: >> >> Tijnema wrote: >> >> > On 6/9/07, Stut <stuttle@xxxxxxxxx> wrote: >> >> >> Tijnema wrote: >> >> >> > Hmm, fseek seems cool, but what about FTP resources? If I open >> them >> >> >> > with ftp_connect, do I need to fetch all data from FTP again, and >> >> then >> >> >> > just trash all data I don't need? >> >> >> >> >> >> Yes, but depending on what you're actually doing you may be able to >> >> >> cache enough to skip large chunks in subsequent requests. >> >> >> >> >> >> -Stut >> >> > >> >> > Well, I'm working on a script that can transfer large files over >> HTTP. >> >> > The point is that I have a HTTP proxy at school, and so I can use >> HTTP >> >> > only. Moreover, they blocked downloading files bigger than 1MB, and >> >> > so, I wanted to transfer files in packets of lets say 990KB, so that >> >> > they can be downloaded fine through the HTTP proxy. This means i'm >> >> > calling repeatly the script for a next chunk, and that's why I >> wanted >> >> > to keep the FTP connection open. >> >> >> >> Write it to a temporary file and store that temporary filename in the >> >> session. When the page is called, get the filesize of the temporary >> file >> >> and use that as the start of the next chunk to download. >> >> >> >> -Stut >> > >> > Do you think this is the best way to do? >> > Even for large files , let's say 1 DVD (4,7GB)? >> >> I can't think of a better way. This way you're building up the file on >> disk chunk by chunk, not storing much in the session and it should scale >> to any size of file quite well. The only thing you might have to watch >> is cleaning up the files created by aborted downloads. >> >> -Stut > > What about creating a new file for each chunk? > Would that be faster and less resource intensive then using fseek all > the time? No, it would be more resource intensive and probably slower. Seeking through a file is a very cheap thing for most OS's to do. -Stut
Ok thanks, I'm only interested in linux ;) Tijnema
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