我正在尝试使用表单上传文件。每当我尝试使用本地服务器上传时，它都可以正常运行。但是，当我在在线应用程序上尝试此操作时，它通常会失败并显示“错误503，网关错误”。不知道出了什么问题！ 服务器功能是
Memory Limit:256M
Max Upload Size:512M
Max Post Size:512M
Max Exe Time:300
Max Inp Time:300
请帮助我摆脱这个问题！！！
这是代码
HTML表单
<form class="contact-form" id="upload_form" action="#" method="post" enctype="multipart/form-data">
<div class="row">
<div class="col-md-12">
<label><small>License Type<sup title="Necessary">(*)</sup></small></label>
<?php
$fetch_types = $connection->query("SELECT * FROM `wo_license_types` WHERE `status` = 1");
if($fetch_types){
if($fetch_types->num_rows > 0){ ?>
<select name="license_type" required required="required">
<?php
while($type = $fetch_types->fetch_assoc()){
?>
<option value="<?php echo $type['id']; ?>"><?php echo $type['title']; ?></option>
<?php
}
?>
</select>
<?php } else { ?>
<input type="text" name="license_type" value="<?php echo getPost('license_type'); ?>" placeholder="License Type">
<?php }
} else {
redirect('lessons.php');
}
?>
</div>
<div class="col-md-6">
<label><small>Chapter No<sup title="Necessary">(*)</sup></small></label>
<input type="text" name="chapter_no" required required="required" placeholder="Chapter No" pattern="[0-9]{1,3}" title="The chapter number should only contain numbers from 0 to 9 i.e. 12">
</div>
<div class="col-md-6">
<label><small>Chapter Name<sup title="Optional">(Opt)</sup></small></label>
<input type="text" name="chapter_title" placeholder="Chapter Name">
</div>
<div class="col-md-6">
<label><small>Page No<sup title="Necessary">(*)</sup></small></label>
<input type="text" name="page_no" required required="required" placeholder="Page No" pattern="[0-9]{1,3}" title="The page number should only contain numbers from 0 to 9 i.e. 120">
</div>
<div class="col-md-12">
<label><small>Description<sup title="Optional">(Opt)</sup></small></label>
<textarea name="description" placeholder="Give brief description"></textarea>
</div>
<div class="col-md-6">
<label><small>Attach Audio<sup title="Necessary">(*)</sup></small></label>
<input type="file" name="audio" id="audio" required required="required" placeholder="Attach audio file" style="padding-top: 15px;">
</div>
<div class="col-md-6">
<label><small>Attach Picture<sup title="Necessary">(*)</sup></small></label>
<input type="file" name="img" id="img" required required="required" placeholder="Attach picture" style="padding-top: 15px;">
</div>
<div class="col-sm-12">
<progress id="audio_progressBar" value="0" max="100" style="width:100%;"></progress>
<small id="audio_status"></small>
</div>
<div class="col-md-12" style="text-align: center;">
<input style="background-color: #f43f00; color: #ffffff; margin-bottom: 0px; padding-bottom: 0px;" type="button" id="post_lesson_button" value="Upload Lesson" onclick="post_lesson()">
</div>
</div>
</form>
Java脚本：
<script>
function _(el){
return document.getElementById(el);
}
function post_lesson(){
document.getElementById("post_lesson_button").disabled = true;
_("audio_status").innerHTML = "<span style='color: blue;'><b>Progress:</b> Posting Lesson...</span>";
var license_type = $("select[name='license_type']").val().trim();
var chapter_no = $("input[name='chapter_no']").val().trim();
var chapter_title = $("input[name='chapter_title']").val().trim();
var page_no = $("input[name='page_no']").val().trim();
var description = $("textarea[name='description']").val().trim();
var img_file = _("img");
var audio_file = _("audio");
if(img_file.files.length > 0 & audio_file.files.length > 0){
var formdata = new FormData();
formdata.append("http_request", "post_lesson");
formdata.append("license_type", license_type);
formdata.append("chapter_no", chapter_no);
formdata.append("chapter_title", chapter_title);
formdata.append("page_no", page_no);
formdata.append("description", description);
formdata.append("img", img_file.files[0]);
formdata.append("audio", audio_file.files[0]);
var ajax = new XMLHttpRequest();
ajax.upload.addEventListener("progress", progressHandler, false);
ajax.addEventListener("load", completeHandler, false);
ajax.addEventListener("error", errorHandler, false);
ajax.addEventListener("abort", abortHandler, false);
ajax.open("POST", "file_upload_parser.php", true);
ajax.send(formdata);
} else {
_("audio_status").innerHTML = "<span style='color: red;'><b>Error: </b>Please attach image and audio files.</span>";
document.getElementById("post_lesson_button").disabled = false;
}
}
function progressHandler(event){
var percent = (event.loaded / event.total) * 100;
_("audio_progressBar").value = Math.round(percent);
_("audio_status").innerHTML = Math.round(percent)+"% uploading... please wait";
}
function completeHandler(event){
if(event.target.responseText[event.target.responseText.length-1] == 1){
_("audio_status").innerHTML = "<span><b style='color: green;'>Success:</b> Lesson posted successfully !</span>";
_("upload_form").reset();
document.getElementById("post_lesson_button").disabled = false;
window.location.href = "add-lesson.php";
} else {
_("audio_status").innerHTML = event.target.responseText;
document.getElementById("post_lesson_button").disabled = false;
}
}
function errorHandler(event){
_("audio_status").innerHTML = "Upload Failed";
document.getElementById("post_lesson_button").disabled = false;
console.log(event.target.responseText);
console.log(event);
}
function abortHandler(event){
_("audio_status").innerHTML = "Upload Aborted";
document.getElementById("post_lesson_button").disabled = false;
console.log(event.target.responseText);
console.log(event);
}
</script>
file_upload_parser.php
<?php
require_once 'core/init.php';
if(isset($_POST['http_request']) AND getPost('http_request') == 'post_lesson'){
$license_type = getPost('license_type');
$chapter_no = getPost('chapter_no');
$chapter_title = getPost('chapter_title');
$page_no = getPost('page_no');
$description = getPost('description');
$img_file = $_FILES["img"];
$audio_file = $_FILES['audio'];
$chapter_id = null;
$img_upl_name = null;
$audio_upl_name = null;
if(is_numeric($chapter_no) AND $chapter_no > 0 AND is_numeric($page_no) AND $page_no > 0 AND ((strlen($chapter_title) >= 3 AND strlen($chapter_title) <= 55) OR (strlen($chapter_title) == 0)) AND ((strlen($description) >= 10 AND strlen($description) <= 500) OR (strlen($description) == 0))){
if($error_status == false){
echo "<span><b style='color: blue;'>Progress:</b> Validating data...<br /></span>";
$verify_license_type = $connection->query("SELECT * FROM `wo_license_types` WHERE `id` = '$license_type' AND `status` = 1");
if(!$verify_license_type OR $verify_license_type->num_rows != 1){
echo "<span style='color: red;'>Something went wrong with license type !</span>";
exit();
}
$verify_chapter = $connection->query("SELECT * FROM `wo_license_chapters` WHERE `license_type` = '$license_type' AND `chapter_no` = '$chapter_no' AND `status` = 1");
if($verify_chapter){
if($verify_chapter->num_rows == 0){
$add_chapter = $connection->query("INSERT INTO `wo_license_chapters` (`chapter_no`, `title`, `license_type`, `added_by`, `status`) VALUES ('$chapter_no', '$chapter_title', '$license_type', '$admin_id', 1)");
if($add_chapter){
$chapter_id = $connection->insert_id;
} else {
echo "<span style='color: red;'><b>Error:</b> Oops... an unknown error occurred !</span>";
exit();
}
} else if($verify_chapter->num_rows == 1){
$chapter_id = $verify_chapter->fetch_assoc()['id'];
} else {
echo "<span style='color: red;'><b>Error:</b> Oops... an unknown error occurred !</span>";
exit();
}
} else {
echo "<span style='color: red;'><b>Error:</b> Oops... an unknown error occurred !</span>";
exit();
}
} else {
echo "<span style='color: red;'><b>Error:</b> Oops... an unknown error occurred !</span>";
exit();
}
if($error_status == false){
$verify_page_no = $connection->query("SELECT * FROM `wo_license_pages` WHERE `chapter_id` = '$chapter_id' AND `page_no` = '$page_no' AND `language` = 1 AND `status` = 1");
if($verify_page_no){
if($verify_page_no->num_rows == 1){
$error_status = true;
echo "<span style='color: red;'>You have already added this page.</span>";
exit();
}
} else {
echo "<span style='color: red;'><b>Error:</b> Oops... an unknown error occurred !</span>";
exit();
}
} else {
echo "<span style='color: red;'><b>Error:</b> Oops... an unknown error occurred !</span>";
exit();
}
if($error_status == false){
echo "<span><b style='color: blue;'>Progress:</b> Validating files...<br /></span>";
$img_name = $img_file["name"];
$img_TmpLoc = $img_file["tmp_name"];
$img_ErrorMsg = $img_file["error"];
$img_Size = $img_file['size'];
if(!$img_TmpLoc OR empty($img_name)) {
echo "<span><b>Error:</b> Please browse for an image file before clicking the post button.</span>";
$error_status = true;
exit();
}
if($img_Size >= 10485760){
echo "<span><b>Error:</b> Image file is larger than 10 MB, Please choose other file.</span>";
$error_status = true;
exit();
}
$allowed_img_files = array('jpg', 'jpeg', 'png');
$img_ext = explode('.', $img_name);
$img_ext = end($img_ext);
$img_upl_name = uniqid() . '.' . $img_ext;
if(!in_array($img_ext, $allowed_img_files)){
echo "<span style='color: red;'><b>Error:</b> Please choose a valid image file.</span>";
$error_status = true;
exit();
}
$audio_name = $audio_file["name"];
$audio_TmpLoc = $audio_file["tmp_name"];
$audio_ErrorMsg = $audio_file["error"];
$audio_Size = $audio_file['size'];
if(!$audio_TmpLoc OR empty($audio_name)) {
echo "<span><b style='color: red;'>Error:</b> Please browse for an audio file before clicking the post button.</span>";
$error_status = true;
exit();
}
if($audio_Size >= 125829120){
echo "<span><b style='color: red;'>Error:</b> Audio file is larger than 120 MB, Please choose other file.</span>";
$error_status = true;
exit();
}
$allowed_audio_files = array('mp3', 'aac', 'wav');
$audio_ext = explode('.', $audio_name);
$audio_ext = end($audio_ext);
$audio_upl_name = uniqid() . '.' . $audio_ext;
if(!in_array($audio_ext, $allowed_audio_files)){
echo "<span style='color: red;'><b>Error:</b> Please choose a valid audio file.</span>";
$error_status = true;
exit();
}
if($error_status == false){
echo "<span><b style='color: blue;'>Progress:</b> Uploading image file...<br /><span>";
$img_upl_path = "../files/lessons/imgs/".$img_upl_name;
if(!move_uploaded_file($img_TmpLoc, $img_upl_path)){
echo "<span><b style='color: red;'>Failed to upload image file, please try again !</b></span>";
$error_status = true;
exit();
}
echo "<span><b style='color: blue;'>Progress:</b> Uploading audio file...<br /><span>";
$audio_upl_path = "../files/lessons/audios/".$audio_upl_name;
if(!move_uploaded_file($audio_TmpLoc, $audio_upl_path)){
echo "<span><b style='color: red;'>Failed to upload audio file, please try again !</b></span>";
$error_status = true;
exit();
}
if($error_status == false){
echo "<span><b style='color: blue;'>Progress:</b> Posting Lesson...<br /></span>";
$audio_upl_name = array($audio_upl_name);
$audio_upl_name = json_encode($audio_upl_name);
$post_lesson = $connection->query("INSERT INTO `wo_license_pages` (`page_no`, `description`, `img`, `audio`, `chapter_id`, `language`, `added_by`, `status`) VALUES ('$page_no', '$description', '$img_upl_name', '$audio_upl_name', '$chapter_id', 1, '$admin_id', 1)");
if($post_lesson){
echo "1";
exit();
} else {
echo "<span><b style='color: red;'>Error:</b> Failed to post lesson.</span>";
exit();
}
} else {
echo "<span><b style='color: red;'>Error:</b> Failed to post the lesson.</span>";
exit();
}
} else {
echo "<span><b style='color: red;'>Error:</b> Failed validation</span>";
exit();
}
} else {
echo "<span style='color: red;'>Failed validation !</span>";
exit();
}
} else {
$error_status = true;
if(!is_numeric($chapter_no)){
echo "<span><b style='color: red;'>Error:</b> Enter a valid chapter number.</span>";
} else if($chapter_no <= 0){
echo "<span><b style='color: red;'>Error:</b> Enter a valid chapter number.</span>";
} else if(!is_numeric($page_no)){
echo "<span><b style='color: red;'>Error:</b> Enter a valid page number.</span>";
} else if($page_no <= 0){
echo "<span><b style='color: red;'>Error:</b> Enter a valid page number.</span>";
} else if(strlen($chapter_title) > 0 AND strlen($chapter_title) < 3){
echo "<span><b style='color: red;'>Error:</b> Chapter name must contain atleast 3 characters.</span>";
} else if(strlen($chapter_title) > 55){
echo "<span><b style='color: red;'>Error:</b> Chapter name can contain maximum 55 characters.</span>";
} else if(strlen($description) > 0 AND strlen($description) < 10){
echo "<span><b style='color: red;'>Error:</b> Demo Description must contain at least 10 characters.</span>";
} else if(strlen($description) > 500){
echo "<span><b style='color: red;'>Error:</b> Demo Description can contain maximum 500 characters.</span>";
} else {
echo "<span><b style='color: red;'>Error:</b> Oops... An unknown error occurred !</span>";
}
}
}
?>