我尝试将带有 CodeIgniter 2.1 的 jQuery File Upload 6.5安装到我的 Codeigniter 脚本中，但我遇到了一些问题。
起初，我使用带有“模块化扩展 - HMVC（版本 5.4）”的 2.1.3 CI 版本作为第三方进入我的应用程序文件夹。
我想通过使用 blueimp/jQuery-File-Upload 创建一个模块“上传”。我已按照那里描述的说明进行操作，但没有任何效果。
问题是我在开发者控制台中遇到错误：
Uncaught TypeError: Cannot read property 'length' of null main.js:31
POST url/upload/upload_img 500 (Internal Server Error) jquery.js:8416
*我开始上传时显示 500 错误。事实上，upload_img 网址从未打开过。*
这是我的代码：
应用程序/配置/常量.php
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
define('FOPEN_READ', 'rb');
define('FOPEN_READ_WRITE', 'r+b');
define('FOPEN_WRITE_CREATE_DESTRUCTIVE', 'wb'); // truncates existing file data, use with care
define('FOPEN_READ_WRITE_CREATE_DESTRUCTIVE', 'w+b'); // truncates existing file data, use with care
define('FOPEN_WRITE_CREATE', 'ab');
define('FOPEN_READ_WRITE_CREATE', 'a+b');
define('FOPEN_WRITE_CREATE_STRICT', 'xb');
define('FOPEN_READ_WRITE_CREATE_STRICT', 'x+b');
// Define Ajax Request
define('IS_AJAX', isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest');
应用程序/配置/路由
$route['upload'] = 'upload/upload';
$route['upload/upload_img'] = 'upload/upload/upload_img';
$route['upload/deleteImage'] = 'upload/upload/deleteImage';
$route['upload/get_files'] = 'upload/upload/get_files';
应用程序/模块/上传/控制器/上传
和这个控制器一模一样。唯一的变化在于构造：
function __construct() {
parent::__construct();
$this->load->helper(array('form', 'url'));
//Set relative Path with CI Constant
$this->setPath_img_upload_folder("uploads/dress/img/");
$this->setPath_img_thumb_upload_folder("uploads/dress/img/thumbnails/");
//Delete img url
$this->setDelete_img_url(base_url() . '/upload/deleteImage/');
//Set url img with Base_url()
$this->setPath_url_img_upload_folder(base_url() . "uploads/dress/img/");
$this->setPath_url_img_thumb_upload_folder(base_url() . "uploads/dress/img/thumbnails/");
}
public function index() {
$this->load->view('upload_form');
}
js/main.js
与原始帖子中描述的完全相同。
应用程序/模块/上传/查看/upload_form
<!DOCTYPE HTML>
<!--
/*
* jQuery File Upload Plugin Demo 6.11
* https://github.com/blueimp/jQuery-File-Upload
*
* Copyright 2010, Sebastian Tschan
* https://blueimp.net
*
* Licensed under the MIT license:
* http://www.opensource.org/licenses/MIT
*/
-->
<html lang="en">
<head>
<!-- Force latest IE rendering engine or ChromeFrame if installed -->
<!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><![endif]-->
<meta charset="utf-8">
<title>jQuery File Upload Demo</title>
<meta name="description" content="File Upload widget with multiple file selection, drag&drop support, progress bar and preview images for jQuery. Supports cross-domain, chunked and resumable file uploads. Works with any server-side platform (Google App Engine, PHP, Python, Ruby on Rails, Java, etc.) that supports standard HTML form file uploads.">
<meta name="viewport" content="width=device-width">
<!-- Bootstrap CSS Toolkit styles -->
<link rel="stylesheet" href="http://blueimp.github.com/cdn/css/bootstrap.min.css">
<!-- Generic page styles -->
<link rel="stylesheet" href="/blueimp/css/style.css">
<!-- Bootstrap styles for responsive website layout, supporting different screen sizes -->
<link rel="stylesheet" href="http://blueimp.github.com/cdn/css/bootstrap-responsive.min.css">
<!-- Bootstrap CSS fixes for IE6 -->
<!--[if lt IE 7]><link rel="stylesheet" href="http://blueimp.github.com/cdn/css/bootstrap-ie6.min.css"><![endif]-->
<!-- Bootstrap Image Gallery styles -->
<link rel="stylesheet" href="http://blueimp.github.com/Bootstrap-Image-Gallery/css/bootstrap-image-gallery.min.css">
<!-- CSS to style the file input field as button and adjust the Bootstrap progress bars -->
<link rel="stylesheet" href="/blueimp/css/jquery.fileupload-ui.css">
<!-- CSS adjustments for browsers with JavaScript disabled -->
<noscript><link rel="stylesheet" href="/blueimp/css/jquery.fileupload-ui-noscript.css"></noscript>
<!-- Shim to make HTML5 elements usable in older Internet Explorer versions -->
<!--[if lt IE 9]><script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script><![endif]-->
</head>
<body>
<div class="container">
<!-- The file upload form used as target for the file upload widget -->
<form id="fileupload" action="upload/upload_img" method="POST" enctype="multipart/form-data">
<!-- Redirect browsers with JavaScript disabled to the origin page -->
<noscript><input type="hidden" name="redirect" value="http://blueimp.github.com/jQuery-File-Upload/"></noscript>
<!-- The fileupload-buttonbar contains buttons to add/delete files and start/cancel the upload -->
<div class="row fileupload-buttonbar">
<div class="span7">
<!-- The fileinput-button span is used to style the file input field as button -->
<span class="btn btn-success fileinput-button">
<i class="icon-plus icon-white"></i>
<span>Add files...</span>
<input type="file" name="userfile" multiple>
</span>
<button type="submit" class="btn btn-primary start">
<i class="icon-upload icon-white"></i>
<span>Start upload</span>
</button>
<button type="reset" class="btn btn-warning cancel">
<i class="icon-ban-circle icon-white"></i>
<span>Cancel upload</span>
</button>
<button type="button" class="btn btn-danger delete">
<i class="icon-trash icon-white"></i>
<span>Delete</span>
</button>
<input type="checkbox" class="toggle">
</div>
<!-- The global progress information -->
<div class="span5 fileupload-progress fade">
<!-- The global progress bar -->
<div class="progress progress-success progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100">
<div class="bar" style="width:0%;"></div>
</div>
<!-- The extended global progress information -->
<div class="progress-extended"> </div>
</div>
</div>
<!-- The loading indicator is shown during file processing -->
<div class="fileupload-loading"></div>
<br>
<!-- The table listing the files available for upload/download -->
<table role="presentation" class="table table-striped"><tbody class="files" data-toggle="modal-gallery" data-target="#modal-gallery"></tbody></table>
</form>
</div>
<!-- modal-gallery is the modal dialog used for the image gallery -->
<div id="modal-gallery" class="modal modal-gallery hide fade" data-filter=":odd" tabindex="-1">
<div class="modal-header">
<a class="close" data-dismiss="modal">×</a>
<h3 class="modal-title"></h3>
</div>
<div class="modal-body"><div class="modal-image"></div></div>
<div class="modal-footer">
<a class="btn modal-download" target="_blank">
<i class="icon-download"></i>
<span>Download</span>
</a>
<a class="btn btn-success modal-play modal-slideshow" data-slideshow="5000">
<i class="icon-play icon-white"></i>
<span>Slideshow</span>
</a>
<a class="btn btn-info modal-prev">
<i class="icon-arrow-left icon-white"></i>
<span>Previous</span>
</a>
<a class="btn btn-primary modal-next">
<span>Next</span>
<i class="icon-arrow-right icon-white"></i>
</a>
</div>
</div>
<!-- The template to display files available for upload -->
<script id="template-upload" type="text/x-tmpl">
{% for (var i=0, file; file=o.files[i]; i++) { %}
<tr class="template-upload fade">
<td class="preview"><span class="fade"></span></td>
<td class="name"><span>{%=file.name%}</span></td>
<td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
{% if (file.error) { %}
<td class="error" colspan="2"><span class="label label-important">Error</span> {%=file.error%}</td>
{% } else if (o.files.valid && !i) { %}
<td>
<div class="progress progress-success progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><div class="bar" style="width:0%;"></div></div>
</td>
<td class="start">{% if (!o.options.autoUpload) { %}
<button class="btn btn-primary">
<i class="icon-upload icon-white"></i>
<span>Start</span>
</button>
{% } %}</td>
{% } else { %}
<td colspan="2"></td>
{% } %}
<td class="cancel">{% if (!i) { %}
<button class="btn btn-warning">
<i class="icon-ban-circle icon-white"></i>
<span>Cancel</span>
</button>
{% } %}</td>
</tr>
{% } %}
</script>
<!-- The template to display files available for download -->
<script id="template-download" type="text/x-tmpl">
{% for (var i=0, file; file=o.files[i]; i++) { %}
<tr class="template-download fade">
{% if (file.error) { %}
<td></td>
<td class="name"><span>{%=file.name%}</span></td>
<td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
<td class="error" colspan="2"><span class="label label-important">Error</span> {%=file.error%}</td>
{% } else { %}
<td class="preview">{% if (file.thumbnail_url) { %}
<a href="{%=file.url%}" title="{%=file.name%}" rel="gallery" download="{%=file.name%}"><img src="{%=file.thumbnail_url%}"></a>
{% } %}</td>
<td class="name">
<a href="{%=file.url%}" title="{%=file.name%}" rel="{%=file.thumbnail_url&&'gallery'%}" download="{%=file.name%}">{%=file.name%}</a>
</td>
<td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
<td colspan="2"></td>
{% } %}
<td class="delete">
<button class="btn btn-danger" data-type="{%=file.delete_type%}" data-url="{%=file.delete_url%}"{% if (file.delete_with_credentials) { %} data-xhr-fields='{"withCredentials":true}'{% } %}>
<i class="icon-trash icon-white"></i>
<span>Delete</span>
</button>
<input type="checkbox" name="delete" value="1">
</td>
</tr>
{% } %}
</script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.js"></script>
<!-- The jQuery UI widget factory, can be omitted if jQuery UI is already included -->
<script src="/blueimp/js/vendor/jquery.ui.widget.js"></script>
<!-- The Templates plugin is included to render the upload/download listings -->
<script src="http://blueimp.github.com/JavaScript-Templates/tmpl.min.js"></script>
<!-- The Load Image plugin is included for the preview images and image resizing functionality -->
<script src="http://blueimp.github.com/JavaScript-Load-Image/load-image.min.js"></script>
<!-- The Canvas to Blob plugin is included for image resizing functionality -->
<script src="http://blueimp.github.com/JavaScript-Canvas-to-Blob/canvas-to-blob.min.js"></script>
<!-- Bootstrap JS and Bootstrap Image Gallery are not required, but included for the demo -->
<script src="http://blueimp.github.com/cdn/js/bootstrap.min.js"></script>
<script src="http://blueimp.github.com/Bootstrap-Image-Gallery/js/bootstrap-image-gallery.min.js"></script>
<!-- The Iframe Transport is required for browsers without support for XHR file uploads -->
<script src="/blueimp/js/jquery.iframe-transport.js"></script>
<!-- The basic File Upload plugin -->
<script src="/blueimp/js/jquery.fileupload.js"></script>
<!-- The File Upload file processing plugin -->
<script src="/blueimp/js/jquery.fileupload-fp.js"></script>
<!-- The File Upload user interface plugin -->
<script src="/blueimp/js/jquery.fileupload-ui.js"></script>
<!-- The main application script -->
<script src="/blueimp/js/main.js"></script>
<!-- The XDomainRequest Transport is included for cross-domain file deletion for IE8+ -->
<!--[if gte IE 8]><script src="js/cors/jquery.xdr-transport.js"></script><![endif]-->
</body>
</html>
所有链接（js和css）都在工作，我检查了两次。
.htaccess
也许问题就在这里，导致在表单的操作中使用“jquery-file-upload.appspot.com”，脚本工作。
<IfModule mod_rewrite.c>
Options +FollowSymLinks -Indexes
RewriteEngine on
# NOTICE: If you get a 404 play with combinations of the following commented out lines
#AllowOverride All
#RewriteBase /
# Restrict your site to only one domain
#RewriteCond %{HTTP_HOST} !^www\.
#RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
<IfModule mod_php5.c>
RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>
<IfModule !mod_php5.c>
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>
</IfModule>
#prevent access to htaccess file
<Files .htaccess>
order allow,deny
deny from all
</Files>
#disable directory browsing
Options All -Indexes
IndexIgnore *