From e8547f0d727975b701070fb1d5e50bac534407f3 Mon Sep 17 00:00:00 2001
From: Francois Pons <fpons@mandriva.com>
Date: Fri, 25 Jul 2003 15:49:48 +0000
Subject: added back urpmi support for ftp time stamp check when using curl
 (curl still doesn't handle it correctly).

---
 urpm.pm | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 51 insertions(+), 3 deletions(-)

diff --git a/urpm.pm b/urpm.pm
index 46f54fb3..de3c94e5 100644
--- a/urpm.pm
+++ b/urpm.pm
@@ -209,10 +209,58 @@ sub sync_curl {
     local *CURL;
     my $options = shift @_;
     chdir(ref($options) ? $options->{dir} : $options);
+    my (@ftp_files, @other_files);
+    foreach (@_) {
+	/^ftp:\/\/.*\/([^\/]*)$/ && -s $1 > 8192 and do { push @ftp_files, $_; next }; #- manage time stamp for large file only.
+	push @other_files, $_;
+    }
+    if (@ftp_files) {
+	my ($cur_ftp_file, %ftp_files_info);
+
+	eval { require Date::Manip };
+
+	#- prepare to get back size and time stamp of each file.
+	open CURL, join(" ", map { "'$_'" } "/usr/bin/curl",
+			(ref($options) && $options->{limit_rate} ? ("--limit-rate", $options->{limit_rate}) : ()),
+			(ref($options) && $options->{proxy} ? set_proxy({ type => "curl", proxy => $options->{proxy} }) : ()) .
+			"--stderr", "-", "-s", "-I", @ftp_files) . " |";
+	while (<CURL>) {
+	    if (/Content-Length:\s*(\d+)/) {
+		!$cur_ftp_file || exists($ftp_files_info{$cur_ftp_file}{size}) and $cur_ftp_file = shift @ftp_files;
+		$ftp_files_info{$cur_ftp_file}{size} = $1;
+	    }
+	    if (/Last-Modified:\s*(.*)/) {
+		!$cur_ftp_file || exists($ftp_files_info{$cur_ftp_file}{time}) and $cur_ftp_file = shift @ftp_files;
+		eval {
+		    $ftp_files_info{$cur_ftp_file}{time} = Date::Manip::ParseDate($1);
+		    $ftp_files_info{$cur_ftp_file}{time} =~ s/(\d{6}).{4}(.*)/$1$2/; #- remove day and hour.
+		};
+	    }
+	}
+	close CURL;
+
+	#- now analyse size and time stamp according to what already exists here.
+	if (@ftp_files) {
+	    #- re-insert back shifted element of ftp_files, because curl output above
+	    #- have not been parsed correctly, in doubt download them all.
+	    push @ftp_files, keys %ftp_files_info;
+	} else {
+	    #- for that, it should be clear ftp_files is empty... else a above work is
+	    #- use less.
+	    foreach (keys %ftp_files_info) {
+		my ($lfile) = /\/([^\/]*)$/ or next; #- strange if we can't parse it correctly.
+		my $ltime = eval { Date::Manip::ParseDate(scalar gmtime((stat $1)[9])) };
+		$ltime =~ s/(\d{6}).{4}(.*)/$1$2/; #- remove day and hour.
+		-s $lfile == $ftp_files_info{$_}{size} && $ftp_files_info{$_}{time} eq $ltime or
+		  push @ftp_files, $_;
+	    }
+	}
+    }
     #- http files (and other files) are correctly managed by curl to conditionnal download.
-    #- since 7.10.5, ftp donwload are supported by curl using -z too.
-    if (my @all_files = map { /\/([^\/]*)$/ ? ("-z", $1, "-O", $_) : @{[]} } @_) {
-	my @l = @_;
+    #- options for ftp files, -R (-O <file>)*
+    #- options for http files, -R (-z file -O <file>)*
+    if (my @all_files = ((map { ("-O", $_) } @ftp_files), (map { /\/([^\/]*)$/ ? ("-z", $1, "-O", $_) : @{[]} } @other_files))) {
+	my @l = (@ftp_files, @other_files);
 	my ($buf, $file) = ('', undef);
 	open CURL, join(" ", map { "'$_'" } "/usr/bin/curl",
 			(ref($options) && $options->{limit_rate} ? ("--limit-rate", $options->{limit_rate}) : ()),
-- 
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