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Top Forums UNIX for Dummies Questions & Answers How to download files matching pattern from FTP using CURL or WGET? Post 302853715 by Smiling Dragon on Sunday 15th of September 2013 11:58:40 PM
Old 09-16-2013
Weeeellll, with a bit of bodging you can sort of do this.
Tar allows you to operate on an incoming stream (it was originally designed for this) and stop when you've got all you want. You still need to seek through the file until you've found all the files you want:
Code:
wget -q -O - "<url of tarball>" | gunzip -c | tar -xf - "<filename you want to extract>"

This will seek through the tarball, streaming off the ftp server and pop the file you want off as it passes. You can specify multiple files on the one commandline but this will only work if you know the files (although you could try passing an escaped wildcard and see how you go - you'll have to manually abort the extract once you feel you have all the files you want though).
You can also pass the "--files-from <file containing the filnames you want>" flag to tar if you prefer.

Note that this won't save you loads of time, especially so if all the files you want are at the end of the archive, but it will help if they are at the start of the file and it's an interesting exercise in streams.
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CURLOPT_ACCEPTTIMEOUT_MS(3)				     curl_easy_setopt options				       CURLOPT_ACCEPTTIMEOUT_MS(3)

NAME
CURLOPT_ACCEPTTIMEOUT_MS - timeout waiting for FTP server to connect back SYNOPSIS
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ACCEPTTIMEOUT_MS, long ms); DESCRIPTION
Pass a long telling libcurl the maximum number of milliseconds to wait for a server to connect back to libcurl when an active FTP connec- tion is used. DEFAULT
60000 milliseconds PROTOCOLS
FTP EXAMPLE
CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/path/file"); /* wait no more than 5 seconds for FTP server responses */ curl_easy_setopt(curl, CURLOPT_ACCEPTTIMEOUT_MS, 5000L); curl_easy_perform(curl); } AVAILABILITY
Added in 7.24.0 RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. SEE ALSO
CURLOPT_STDERR(3), CURLOPT_DEBUGFUNCTION(3), libcurl 7.54.0 March 06, 2016 CURLOPT_ACCEPTTIMEOUT_MS(3)
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