[英]PHP+Javascript upload based on sessions not working
我使用在buildroot嵌入式linux上運行FastCGI的lighttpd + PHP 5.4。 我前段時間使用以下教程編寫了PHP文件上傳進度腳本的修改版本: http : //phpmaster.com/tracking-upload-progress-with-php-and-javascript/我以前使用mod_php在Slackware Apache上工作而且一切正常。
不幸的是,該腳本無法正常工作。 我已經確保在php.ini中session.upload_progress = On
並啟用了會話。 我已經通過使用兩個簡單的php文件(如第4個)驗證了會話通常是否正常工作。請在此處發布http://quirm.net/forum/topic.php?id=3950 。
該腳本應該顯示加載屏幕和文件上傳百分比。 它是通過每0.2秒發送一次progress.php
請求來實現的。 不幸的是,無論文件有多大(我使用約13 MB的文件進行測試,我都已確保php.ini中的文件上傳大小可以接受此大小),在上傳后第一個請求結束,因為它返回了100。 .php,看起來整個$ _SESSION變量為空。
這是我的表單HTML代碼:
<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代碼(請注意,上載和響應處理功能具有通用性,因為它們接受來自幾種不同形式的上載,用於上載配置,固件等)。
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;
}
而我的PHP代碼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;
}
在http://de3.php.net/manual/de/session.upload-progress.php上說:“請注意,當您的Web服務器通過FastCGI運行PHP時,此功能不起作用。”
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