From: Stefan Reiter <s.reiter@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [PATCH common 05/10] PBSClient: add file_restore_extract function
Date: Wed, 21 Apr 2021 13:15:34 +0200 [thread overview]
Message-ID: <20210421111539.29261-6-s.reiter@proxmox.com> (raw)
In-Reply-To: <20210421111539.29261-1-s.reiter@proxmox.com>
*_prepare creates a fifo for streaming data back to clients directly,
filefile_restore_extract blocks and should be called from a background
worker - while it is running outcoming data can be read from the FIFO.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
---
src/PVE/PBSClient.pm | 63 +++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 62 insertions(+), 1 deletion(-)
diff --git a/src/PVE/PBSClient.pm b/src/PVE/PBSClient.pm
index f6b46b2..3d30155 100644
--- a/src/PVE/PBSClient.pm
+++ b/src/PVE/PBSClient.pm
@@ -5,9 +5,10 @@ use strict;
use warnings;
use Fcntl qw(F_GETFD F_SETFD FD_CLOEXEC);
+use File::Temp qw(tempdir);
use IO::File;
use JSON;
-use POSIX qw(strftime ENOENT);
+use POSIX qw(mkfifo strftime ENOENT);
use PVE::JSONSchema qw(get_standard_option);
use PVE::Tools qw(run_command file_set_contents file_get_contents file_read_firstline $IPV6RE);
@@ -343,4 +344,64 @@ sub file_restore_list {
);
}
+# call sync from API, returns a fifo path for streaming data to clients,
+# pass it to file_restore_extract to start transfering data
+sub file_restore_extract_prepare {
+ my ($self) = @_;
+
+ my $tmpdir = tempdir();
+ mkfifo("$tmpdir/fifo", 0600)
+ or die "creating file download fifo '$tmpdir/fifo' failed: $!\n";
+
+ # allow reading data for proxy user
+ my $wwwid = getpwnam('www-data') ||
+ die "getpwnam failed";
+ chown $wwwid, -1, "$tmpdir"
+ or die "changing permission on fifo dir '$tmpdir' failed: $!\n";
+ chown $wwwid, -1, "$tmpdir/fifo"
+ or die "changing permission on fifo '$tmpdir/fifo' failed: $!\n";
+
+ return "$tmpdir/fifo";
+}
+
+# this blocks while data is transfered, call this from a background worker
+sub file_restore_extract {
+ my ($self, $output_file, $snapshot, $filepath, $base64) = @_;
+
+ my $ret = eval {
+ local $SIG{ALRM} = sub { die "got timeout\n" };
+ alarm(30);
+ sysopen(my $fh, "$output_file", O_WRONLY)
+ or die "open target '$output_file' for writing failed: $!\n";
+ alarm(0);
+
+ my $startcmd = sub {
+ my ($cmd, %opts) = @_;
+
+ delete $opts{outfunc};
+ delete $opts{logfunc};
+ $opts{errfunc} = sub { print $_[0], "\n"; };
+
+ my $fn = fileno($fh);
+ $opts{output} = ">&$fn";
+
+ run_command($cmd, %opts);
+ };
+
+ return run_raw_client_cmd(
+ $self, "extract",
+ [ $snapshot, $filepath, "-", "--base64", $base64 ? 1 : 0 ],
+ binary => "proxmox-file-restore",
+ startcmd => $startcmd,
+ );
+ };
+
+ unlink($output_file);
+ $output_file =~ s/fifo$//;
+ rmdir($output_file) if -d $output_file;
+
+ die "file restore task failed: $@" if $@;
+ return $ret;
+}
+
1;
--
2.20.1
next prev parent reply other threads:[~2021-04-21 11:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-21 11:15 [pve-devel] [PATCH 00/10] Single-file-restore GUI for PBS snapshots Stefan Reiter
2021-04-21 11:15 ` [pve-devel] [PATCH RESEND common 01/10] JSONSchema: don't cycle-check 'download' responses Stefan Reiter
2021-04-21 15:37 ` [pve-devel] applied: " Thomas Lamprecht
2021-04-21 11:15 ` [pve-devel] [PATCH common 02/10] PBSClient: allow running other binaries Stefan Reiter
2021-04-21 14:29 ` Thomas Lamprecht
2021-04-21 14:38 ` Stefan Reiter
2021-04-21 14:50 ` Thomas Lamprecht
2021-04-21 15:37 ` [pve-devel] applied: " Thomas Lamprecht
2021-04-21 11:15 ` [pve-devel] [PATCH common 03/10] PBSClient: add file_restore_list command Stefan Reiter
[not found] ` <<20210421111539.29261-4-s.reiter@proxmox.com>
2021-04-21 13:19 ` Fabian Grünbichler
2021-04-21 11:15 ` [pve-devel] [PATCH common 04/10] PBSClient: allow different command execution callback Stefan Reiter
[not found] ` <<20210421111539.29261-5-s.reiter@proxmox.com>
2021-04-21 13:19 ` Fabian Grünbichler
2021-04-21 13:39 ` Stefan Reiter
2021-04-21 11:15 ` Stefan Reiter [this message]
2021-04-21 11:15 ` [pve-devel] [PATCH RESEND http-server 06/10] allow 'download' to be passed from API handler Stefan Reiter
2021-04-21 15:43 ` [pve-devel] applied: " Thomas Lamprecht
2021-04-21 11:15 ` [pve-devel] [PATCH http-server 07/10] support streaming data form fh to client Stefan Reiter
[not found] ` <<20210421111539.29261-8-s.reiter@proxmox.com>
2021-04-21 13:25 ` Fabian Grünbichler
2021-04-21 11:15 ` [pve-devel] [PATCH http-server 08/10] allow stream download from path and over pvedaemon-proxy Stefan Reiter
2021-04-21 11:15 ` [pve-devel] [PATCH storage 09/10] add FileRestore API for PBS Stefan Reiter
[not found] ` <<20210421111539.29261-10-s.reiter@proxmox.com>
2021-04-21 13:26 ` Fabian Grünbichler
2021-04-21 13:38 ` Stefan Reiter
2021-04-22 6:19 ` Fabian Grünbichler
2021-04-21 11:15 ` [pve-devel] [PATCH manager 10/10] backupview: add file restore button Stefan Reiter
2021-04-22 10:33 ` [pve-devel] [PATCH 00/10] Single-file-restore GUI for PBS snapshots Dominic Jäger
2021-04-22 12:12 ` Stefan Reiter
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