我在 buildroot 嵌入式 Linux 上使用运行 FastCGI 的 lighttpd + PHP 5.4。我前段时间使用以下教程编写了 PHP 文件上传进度脚本的修改版本:http: //phpmaster.com/tracking-upload-progress-with-php-and-javascript/ 我之前正在使用 mod_php 开发 Slackware Apache一切正常。
不幸的是,该脚本无法正常工作。我已确保在 php.inisession.upload_progress = On
中启用了会话。我已经通过使用 4 中的两个简单 php 文件验证了会话通常可以正常工作。在此处发布http://quirm.net/forum/topic.php?id=3950。
该脚本应该显示加载屏幕和文件上传的百分比。它是通过progress.php
每 0.2 秒发送一次请求来实现的。不幸的是,无论文件有多大(我使用 ~13 MB 文件进行测试,我已确保 php.ini 中的文件上传大小接受此大小)上传在第一次请求后结束,因为它返回 100。我已经调试了进度.php 并且看起来整个 $_SESSION 变量是空的。
这是我的表单 HTML 代码:
<form enctype="multipart/form-data" action="actions/upload_upgrade.php" method="post" target="hidden_iframe" onsubmit="upload_type='config'; startUpload('config_form')" id="config_form">
<p class="stdtext">
Select File:
<input type="hidden" name="type" value="config">
<input type="hidden" value="config_form"
name="<?php echo ini_get("session.upload_progress.name"); ?>">
<input type="file" size="35" name="userfile" />
<br><br>
<input type="submit" class="defaultbtn" name="Upload" value="Upload" onclick="showLoadingScreen(true)"/>
</p>
</form>
我的 Javascript 代码(请注意,上传和响应处理函数是通用的,因为它们接受来自用于上传配置、固件等的几种不同形式的上传)。
function sendUploadRequest(form_name)
{
job_name="Upload";
var http = createRequestObject();
http.open("GET", "actions/progress.php?form_name="+form_name);
http.onreadystatechange = function () { handleResponse(http,"sendUploadRequest('"+form_name+"')"); };
http.send(null);
}
function startUpload(form_name)
{
showLoadingScreen(true);
postDataSync("actions/uw.php");
document.getElementById("loadingtext").innerHTML="Uploading file...";
setTimeout("sendUploadRequest('"+form_name+"')", 200);
}
function handleResponse(http,fun_name)
{
hideInfo();
var response;
if (http.readyState == 4)
{
response = http.responseText;
document.getElementById("loadingtext").innerHTML = response + "%";
if (response < 100)
{
setTimeout(fun_name, 200);
}
else
{
showLoadingScreen(false);
if(job_name=="")
printInfo("Job completed successfuly");
else
{
if(job_name=="Upload"&&upload_type=="config")
{
if(hidden_iframe.window.document.body.innerHTML=="SUCCESS")
{
printInfo(job_name+" completed successfuly");
showLoadingScreen(true);
document.getElementById("loadingtext").innerHTML="Restoring backup...";
var result=postDataSync("actions/extract_backup.php");
showLoadingScreen(false);
if(result.substring(0,5)=="ERROR")
{
printError("Error while extracting backup configuration:<br><br>"+result.substring(6));
}
else if(result.substring(0,7)=="SUCCESS")
{
printInfo("Backup configuration restored successfully");
}
else
{
printError("Unknown error while extracting backup. Please contact service.");
}
}
else
{
printInfo(job_name+" was not completed because of errors");
}
}
else
{
if(hidden_iframe.window.document.body.innerHTML=="SUCCESS")
printInfo(job_name+" completed successfuly");
else
printError(job_name+" was not completed because of errors");
}
}
}
}
}
function createRequestObject()
{
var http;
if (navigator.appName == "Microsoft Internet Explorer")
{
http = new ActiveXObject("Microsoft.XMLHTTP");
}
else
{
http = new XMLHttpRequest();
}
return http;
}
还有我的 PHP 代码progress.php:
<?php
session_start();
//print_r($_SESSION);
$key = ini_get("session.upload_progress.prefix") . $_GET['form_name'];
if (!empty($_SESSION[$key])) {
$current = $_SESSION[$key]["bytes_processed"];
$total = $_SESSION[$key]["content_length"];
echo $current < $total ? ceil($current / $total * 100) : 100;
}
else {
echo 100;
}