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From: Daniel Tschlatscher <d.tschlatscher@proxmox.com>
To: pve-devel@lists.proxmox.com, pbs-devel@lists.proxmox.com,
	pmg-devel@lists.proxmox.com
Subject: [pmg-devel] [PATCH manager v4] make task log downloadable in the PVE manager backend
Date: Wed, 23 Nov 2022 15:52:09 +0100	[thread overview]
Message-ID: <20221123145210.592981-4-d.tschlatscher@proxmox.com> (raw)
In-Reply-To: <20221123145210.592981-1-d.tschlatscher@proxmox.com>

The read_tasklog API call now stream the whole log file if the query
parameter 'download' is set to true.
This is done in preparation for the task log download button to be
added in the TaskViewer.

Signed-off-by: Daniel Tschlatscher <d.tschlatscher@proxmox.com>
---
Changes from v3:
* API parameter 'download' for directly streaming the file
* Adapted API parameter descriptions to other backends

 PVE/API2/Tasks.pm | 48 ++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 41 insertions(+), 7 deletions(-)

diff --git a/PVE/API2/Tasks.pm b/PVE/API2/Tasks.pm
index 9cd1e56b..16041720 100644
--- a/PVE/API2/Tasks.pm
+++ b/PVE/API2/Tasks.pm
@@ -342,15 +342,20 @@ __PACKAGE__->register_method({
 		minimum => 0,
 		default => 0,
 		optional => 1,
-		description => "The line number to start printing at.",
+		description => "Start at this line when reading the tasklog",
 	    },
 	    limit => {
 		type => 'integer',
 		minimum => 0,
 		default => 50,
 		optional => 1,
-		description => "The maximum amount of lines that should be printed.",
+		description => "The amount of lines to read from the tasklog.",
 	    },
+	    download => {
+		type => 'boolean',
+		optional => 1,
+		description => "Whether the tasklog file should be downloaded. This parameter can't be used in conjunction with other parameters",
+	    }
 	},
     },
     returns => {
@@ -378,8 +383,6 @@ __PACKAGE__->register_method({
 	my $rpcenv = PVE::RPCEnvironment::get();
 	my $user = $rpcenv->get_user();
 	my $node = $param->{node};
-	my $start = $param->{start} // 0;
-	my $limit = $param->{limit} // 50;
 
 	$convert_token_task->($task);
 
@@ -387,11 +390,42 @@ __PACKAGE__->register_method({
 	    $rpcenv->check($user, "/nodes/$node", [ 'Sys.Audit' ]);
 	}
 
-	my ($count, $lines) = PVE::Tools::dump_logfile($filename, $start, $limit);
+	my $download = $param->{download} // 0;
 
-	$rpcenv->set_result_attrib('total', $count);
+	if ($download) {
+	    die "Parameter 'download' can't be used with other parameters\n"
+		if (defined($param->{start}) || defined($param->{limit}));
 
-	return $lines;
+	    my $fh;
+	    my $use_compression = ( -s $filename ) > 1024;
+
+	    # 1024 is a practical cutoff for the size distribution of our log files.
+	    if ($use_compression) {
+		open($fh, "-|", "/usr/bin/gzip", "-c", "$filename")
+		    or die "Could not create compressed file stream for file '$filename' - $!\n";
+	    } else {
+		open($fh, '<', $filename) or die "Could not open file '$filename' - $!\n";
+	    }
+
+	    return {
+		download => {
+		    fh => $fh,
+		    stream => 1,
+		    'content-encoding' => $use_compression ? 'gzip' : undef,
+		    'content-type' => "text/plain",
+		    'content-disposition' => "attachment; filename=\"".$param->{upid}."\"",
+		},
+	    },
+	} else {
+	    my $start = $param->{start} // 0;
+	    my $limit = $param->{limit} // 50;
+
+	    my ($count, $lines) = PVE::Tools::dump_logfile($filename, $start, $limit);
+
+	    $rpcenv->set_result_attrib('total', $count);
+
+	    return $lines;
+	}
     }});
 
 
-- 
2.30.2





  parent reply	other threads:[~2022-11-23 15:01 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-23 14:52 [pmg-devel] [PATCH backup/pmg-api/manager/common v4] fix: #3971 Tasklog download button Daniel Tschlatscher
2022-11-23 14:52 ` [pmg-devel] [PATCH backup v4] make tasklog downloadable in the backup server backend Daniel Tschlatscher
2022-11-24 10:26   ` [pmg-devel] applied: [pbs-devel] " Wolfgang Bumiller
2022-11-23 14:52 ` [pmg-devel] [PATCH pmg-api v4] make tasklog downloadable in the PMG backend Daniel Tschlatscher
2022-11-23 14:52 ` Daniel Tschlatscher [this message]
2022-11-23 14:52 ` [pmg-devel] [PATCH common v4] return whole log file if limit is 0 Daniel Tschlatscher
2022-11-24 16:24   ` [pmg-devel] applied: [pve-devel] " Thomas Lamprecht

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