Javascript jQuery和perl：基于“状态”的进度条；管道文件"；，动态ajax
我想构建一个小管道，允许用户选择一个文件，然后使用该文件作为输入运行几个脚本。由于其中一些脚本会运行几分钟（具体时间取决于输入文件的大小），因此我想显示一个进度条，该进度条基于此管道中已完成的脚本数量 问题是，我不知道如何根据管道的状态更新此进度条，如果您能提供帮助，我将不胜感激。我先展示我使用的文件，然后更详细地解释问题 我的html表单：Javascript jQuery和perl：基于“状态”的进度条；管道文件"；，动态ajax,javascript,jquery,ajax,perl,progress-bar,Javascript,Jquery,Ajax,Perl,Progress Bar,我想构建一个小管道，允许用户选择一个文件，然后使用该文件作为输入运行几个脚本。由于其中一些脚本会运行几分钟（具体时间取决于输入文件的大小），因此我想显示一个进度条，该进度条基于此管道中已完成的脚本数量 问题是，我不知道如何根据管道的状态更新此进度条，如果您能提供帮助，我将不胜感激。我先展示我使用的文件，然后更详细地解释问题 我的html表单： <form action="main.pl" method="post" enctype="multipart/form-data">
<form action="main.pl" method="post" enctype="multipart/form-data">
<input type="file" name="fileName" />
<input type="submit" value="Analyze" />
</form>
http://jqueryui.com/progressbar/#label
.ui进度条{
位置：相对位置；
}
.进度标签{
位置：绝对位置；
左：50%；
顶部：4px；
字体大小：粗体；
文本阴影：1px 1px 0#fff；
}
$（函数（）{
var progressbar=$（“#progressbar”），
progressLabel=$（“.progressLabel”）；
progressbar.progressbar({
值：false，
更改：函数（）{
progressLabel.text（progressbar.progressbar（“值”）+“%”）；
},
完成：函数（）{
progressLabel.text（“完成！”）；
}
});
功能进展（）{
var val=progressbar.progressbar（“值”）|| 0；
progressbar.progressbar（“值”，val+10）；
如果（val<99）{
设置超时（进度，800）；
}
}
setTimeout（progress，2000）；
});
加载。。。
如果没有简单的方法做到这一点：是否可以引入一个If子句，每隔x分钟（使用setTimeout）检查main.pl中这些perl脚本生成的输出文件是否存在，如果存在，则更新进度条，如果没有，则等待更长时间？如果是这样，它将如何实施？自从我提出这个问题以来，差不多一个月过去了，但没有给出答案。因此，我现在发布我的一篇文章，它是基于这个SuiteisBlacknot的评论 虽然没有那么详细，但它可以作为一个关于如何连接Perl、HTML、Javascript/Ajax和JSON的最小示例。也许这有助于人们开始讨论这个话题 如果要运行此代码，只需将index.html文件复制到html目录（例如/var/www/html），将perl脚本复制到cgi-bin目录（例如/var/www/cgi-bin）。确保这些perl脚本是可执行的！在我下面的代码中，cgi目录位于/var/www/cgi-bin/ajax/stackCGI-请相应地更改它 管道的状态将写入一个文件，然后每隔1秒读取一次，更新进度条并显示有关当前状态的消息。管道中单个步骤的持续时间由Perl的sleep函数表示 文件如下所示 欢迎任何意见和改进 index.html：
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
<meta charset='utf-8' />
<link rel="stylesheet" href="http://code.jquery.com/ui/1.11.3/themes/smoothness/jquery-ui.css">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="http://code.jquery.com/ui/1.11.3/jquery-ui.js"></script>
<style>
.ui-progressbar {
position: relative;
}
.progress-label {
position: absolute;
left: 50%;
font-weight: bold;
text-shadow: 1px 1px 0 #fff;
}
</style>
<script>
var progressVal = 0;
function get_progress() //get_progress();
{
$.ajax({
type: 'POST',
url: '/cgi-bin/ajax/stackCGI/readFromFileJson.pl',
success: function( res ) {
$('#progressPerc').append(' ' + res.progressSummary.progress);
$('#progressMessage').html('status of pipeline: ' + res.progressSummary.progressMessage);
$('.progress-label').html(res.progressSummary.progress + '%');
progressVal = parseFloat(res.progressSummary.progress);
$( "#progressbar" ).progressbar({
value: progressVal
});
}
});
if (progressVal < 100){ //pipeline has not finished yet
setTimeout(get_progress, 1000); //call the function each second every second to get a status update
}
else { //pipeline has finished
$('.progress-label').html('100%');
alert("pipeline has finished! your results can be found in path/to/files. an e-mail has been sent to user@provider.com");
}
}
function start_pipeline()
{
$.ajax({
type: 'POST',
url: '/cgi-bin/ajax/stackCGI/pipeline.pl',
data: { 'fileAnalysis': $('#myFile').val() },
success: function(res) {
//add your success function here
},
error: function() {alert("pipeline has not started!");}
});
}
</script>
</head>
<body>
file name: <input type='text' id='myFile'/>
<button onclick='start_pipeline();get_progress();' >Analyze now</button>
<div id="progressbar"><div class="progress-label"></div></div>
<div id="progressMessage"></div>
<div id="progressPerc">status of pipeline in percent (in this example the function get_progress is called every second): </div>
</body>
#!/usr/bin/perl
use strict;
use warnings;
use JSON;
use CGI;
my $q = new CGI;
#create a file where the progress is reported to
#make sure you have the appropriate permissions to do this
my $filename = '/var/www/cgi-bin/ajax/stackCGI/progressReport.txt'; #change the directory!
open(my $fh, '<:encoding(UTF-8)', $filename) or die "Could not open file '$filename' $!";
print $q->header('application/json;charset=UTF-8'); #output will be returned in JSON format
my @progressReport = split(/\t/,<$fh>); #file is tab separated
my %progressHash;
$progressHash{"progress"} = $progressReport[0];
$progressHash{"progressMessage"} = $progressReport[1];
#convert hash to JSON format
my $op = JSON -> new -> utf8 -> pretty(1);
my $output = $op -> encode({
progressSummary => \%progressHash
});
print $output;
#/usr/bin/perl
严格使用；
使用警告；
使用JSON；
使用CGI；
my$q=新的CGI；
#创建一个向其报告进度的文件
#确保您具有执行此操作的适当权限
my$filename='/var/www/cgi-bin/ajax/stackCGI/progressReport.txt'#更改目录！
打开（我的$fh，'一个解决方案：将当前进度写入会话文件，这样不同的用户就不会践踏彼此的数据。创建另一个Perl脚本，读取会话文件并在JSON对象中返回当前进度。定期向该Perl脚本发送AJAX请求以检查进度。有趣的想法，非常感谢！让我们看看是什么原因呃我把这件事做完了。。。
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
<meta charset='utf-8' />
<link rel="stylesheet" href="http://code.jquery.com/ui/1.11.3/themes/smoothness/jquery-ui.css">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="http://code.jquery.com/ui/1.11.3/jquery-ui.js"></script>
<style>
.ui-progressbar {
position: relative;
}
.progress-label {
position: absolute;
left: 50%;
font-weight: bold;
text-shadow: 1px 1px 0 #fff;
}
</style>
<script>
var progressVal = 0;
function get_progress() //get_progress();
{
$.ajax({
type: 'POST',
url: '/cgi-bin/ajax/stackCGI/readFromFileJson.pl',
success: function( res ) {
$('#progressPerc').append(' ' + res.progressSummary.progress);
$('#progressMessage').html('status of pipeline: ' + res.progressSummary.progressMessage);
$('.progress-label').html(res.progressSummary.progress + '%');
progressVal = parseFloat(res.progressSummary.progress);
$( "#progressbar" ).progressbar({
value: progressVal
});
}
});
if (progressVal < 100){ //pipeline has not finished yet
setTimeout(get_progress, 1000); //call the function each second every second to get a status update
}
else { //pipeline has finished
$('.progress-label').html('100%');
alert("pipeline has finished! your results can be found in path/to/files. an e-mail has been sent to user@provider.com");
}
}
function start_pipeline()
{
$.ajax({
type: 'POST',
url: '/cgi-bin/ajax/stackCGI/pipeline.pl',
data: { 'fileAnalysis': $('#myFile').val() },
success: function(res) {
//add your success function here
},
error: function() {alert("pipeline has not started!");}
});
}
</script>
</head>
<body>
file name: <input type='text' id='myFile'/>
<button onclick='start_pipeline();get_progress();' >Analyze now</button>
<div id="progressbar"><div class="progress-label"></div></div>
<div id="progressMessage"></div>
<div id="progressPerc">status of pipeline in percent (in this example the function get_progress is called every second): </div>
</body>
#!/usr/bin/perl
use strict;
use warnings;
use CGI;
my $q = new CGI;
print $q->header('text/plain'); #needed! otherwise the ajax call in start_pipeline returns the error message
my $fileForAnalysis = $q -> param('fileAnalysis');
#create a file where the progress is reported to
#make sure you have the appropriate permissions to do this
my $filename = '/var/www/cgi-bin/ajax/stackCGI/progressReport.txt'; #change the directory!
my $fh; #file handler
my $number; #progress of pipeline in percent
my $message; #progress of pipeline
$number = 0;
$message = 'pipeline has startet successfully! Your file '.$fileForAnalysis.' is now processed.';
open($fh, '>', $filename) or die "Could not open file '$filename' $!";
print $fh $number."\t".$message;
close $fh;
sleep(3); #first program is running
$number = 10; #progress of pipeline in percent. as we have 4 programs in this pipeline it could also be 25 or whatever
$message = 'first program has finished';
open($fh, '>', $filename) or die "Could not open file '$filename' $!";
print $fh $number."\t".$message;
close $fh;
sleep(5); #second program is running
$number = 20;
$message = 'second program has finished';
open($fh, '>', $filename) or die "Could not open file '$filename' $!";
print $fh $number."\t".$message;
close $fh;
sleep(5); #third program is running
$number = 42;
$message = 'third program has finished';
open($fh, '>', $filename) or die "Could not open file '$filename' $!";
print $fh $number."\t".$message;
close $fh;
sleep(5); #fourth program is running
$number = 100;
$message = 'pipeline has finished';
open($fh, '>', $filename) or die "Could not open file '$filename' $!";
print $fh $number."\t".$message;
close $fh;
#!/usr/bin/perl
use strict;
use warnings;
use JSON;
use CGI;
my $q = new CGI;
#create a file where the progress is reported to
#make sure you have the appropriate permissions to do this
my $filename = '/var/www/cgi-bin/ajax/stackCGI/progressReport.txt'; #change the directory!
open(my $fh, '<:encoding(UTF-8)', $filename) or die "Could not open file '$filename' $!";
print $q->header('application/json;charset=UTF-8'); #output will be returned in JSON format
my @progressReport = split(/\t/,<$fh>); #file is tab separated
my %progressHash;
$progressHash{"progress"} = $progressReport[0];
$progressHash{"progressMessage"} = $progressReport[1];
#convert hash to JSON format
my $op = JSON -> new -> utf8 -> pretty(1);
my $output = $op -> encode({
progressSummary => \%progressHash
});
print $output;