我正在尝试实施this教程，我相信我已经完成了教程中所说的内容。但是在下载过程似乎完成后我收到了这个错误。
Error SyntaxError: Unexpected token <
在这里你可以看到我的控制器：
<?php
class Upload extends CI_Controller{
function __construct() {
parent::__construct();
}
public function index()
{
$this->load->view("upload");
}
public function upload()
{
error_reporting(E_ALL | E_STRICT);
$this->load->helper("upload.class");
$upload_handler = new UploadHandler();
header('Pragma: no-cache');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Content-Disposition: inline; filename="files.json"');
header('X-Content-Type-Options: nosniff');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: OPTIONS, HEAD, GET, POST, PUT, DELETE');
header('Access-Control-Allow-Headers: X-File-Name, X-File-Type, X-File-Size');
switch ($_SERVER['REQUEST_METHOD']) {
case 'OPTIONS':
break;
case 'HEAD':
case 'GET':
$upload_handler->get();
break;
case 'POST':
if (isset($_REQUEST['_method']) && $_REQUEST['_method'] === 'DELETE') {
$upload_handler->delete();
} else {
$upload_handler->post();
}
break;
case 'DELETE':
$upload_handler->delete();
break;
default:
header('HTTP/1.1 405 Method Not Allowed');
}
}
}
有一个类可以生成所有上传内容，这些内容放在helpers文件夹中。我怀疑将不是函数而是将类放入帮助文件夹会导致问题吗？但是，我认为错误与此无关。也许是jQuery的问题，但又不确定。
以下是我查看的部分内容：
<form id="fileupload" action="<?=base_url()?>upload/upload" method="POST" enctype="multipart/form-data">
<!-- 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="files[]" 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">
<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 class="table table-striped"><tbody class="files" data-toggle="modal-gallery" data-target="#modal-gallery"></tbody></table>
</form>
<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">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || file.error%}</td>
{% } else if (o.files.valid && !i) { %}
<td>
<div class="progress progress-success progress-striped active"><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>{%=locale.fileupload.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>{%=locale.fileupload.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">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || 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%}">
<i class="icon-trash icon-white"></i>
<span>{%=locale.fileupload.destroy%}</span>
</button>
<input type="checkbox" name="delete" value="1">
</td>
</tr>
{% } %}
</script>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<!-- The jQuery UI widget factory, can be omitted if jQuery UI is already included -->
<script src="<?=base_url()?>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="<?=base_url()?>js/jquery.iframe-transport.js"></script>
<!-- The basic File Upload plugin -->
<script src="<?=base_url()?>js/jquery.fileupload.js"></script>
<!-- The File Upload file processing plugin -->
<script src="<?=base_url()?>js/jquery.fileupload-fp.js"></script>
<!-- The File Upload user interface plugin -->
<script src="<?=base_url()?>js/jquery.fileupload-ui.js"></script>
<!-- The localization script -->
<script src="<?=base_url()?>js/locale.js"></script>
<!-- The main application script -->
<script src="<?=base_url()?>js/main.js"></script>
以下是我在Codeigniter的帮助文件夹中的上传类：
<?php
class UploadHandler
{
protected $options;
function __construct($options=null) {
$this->options = array(
'script_url' => $this->getFullUrl().'/',
'upload_dir' => dirname($_SERVER['SCRIPT_FILENAME']).'/files/',
'upload_url' => $this->getFullUrl().'/files/',
'param_name' => 'files',
// Set the following option to 'POST', if your server does not support
// DELETE requests. This is a parameter sent to the client:
'delete_type' => 'DELETE',
// The php.ini settings upload_max_filesize and post_max_size
// take precedence over the following max_file_size setting:
'max_file_size' => null,
'min_file_size' => 1,
'accept_file_types' => '/.+$/i',
// The maximum number of files for the upload directory:
'max_number_of_files' => null,
// Image resolution restrictions:
'max_width' => null,
'max_height' => null,
'min_width' => 1,
'min_height' => 1,
// Set the following option to false to enable resumable uploads:
'discard_aborted_uploads' => true,
// Set to true to rotate images based on EXIF meta data, if available:
'orient_image' => false,
'image_versions' => array(
// Uncomment the following version to restrict the size of
// uploaded images. You can also add additional versions with
// their own upload directories:
/*
'large' => array(
'upload_dir' => dirname($_SERVER['SCRIPT_FILENAME']).'/files/',
'upload_url' => $this->getFullUrl().'/files/',
'max_width' => 1920,
'max_height' => 1200,
'jpeg_quality' => 95
),
*/
'thumbnail' => array(
'upload_dir' => dirname($_SERVER['SCRIPT_FILENAME']).'/thumbnails/',
'upload_url' => $this->getFullUrl().'/thumbnails/',
'max_width' => 80,
'max_height' => 80
)
)
);
if ($options) {
$this->options = array_replace_recursive($this->options, $options);
}
}
protected function getFullUrl() {
return
(isset($_SERVER['HTTPS']) ? 'https://' : 'http://').
(isset($_SERVER['REMOTE_USER']) ? $_SERVER['REMOTE_USER'].'@' : '').
(isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : ($_SERVER['SERVER_NAME'].
(isset($_SERVER['HTTPS']) && $_SERVER['SERVER_PORT'] === 443 ||
$_SERVER['SERVER_PORT'] === 80 ? '' : ':'.$_SERVER['SERVER_PORT']))).
substr($_SERVER['SCRIPT_NAME'],0, strrpos($_SERVER['SCRIPT_NAME'], '/'));
}
protected function set_file_delete_url($file) {
$file->delete_url = $this->options['script_url']
.'?file='.rawurlencode($file->name);
$file->delete_type = $this->options['delete_type'];
if ($file->delete_type !== 'DELETE') {
$file->delete_url .= '&_method=DELETE';
}
}
protected function get_file_object($file_name) {
$file_path = $this->options['upload_dir'].$file_name;
if (is_file($file_path) && $file_name[0] !== '.') {
$file = new stdClass();
$file->name = $file_name;
$file->size = filesize($file_path);
$file->url = $this->options['upload_url'].rawurlencode($file->name);
foreach($this->options['image_versions'] as $version => $options) {
if (is_file($options['upload_dir'].$file_name)) {
$file->{$version.'_url'} = $options['upload_url']
.rawurlencode($file->name);
}
}
$this->set_file_delete_url($file);
return $file;
}
return null;
}
protected function get_file_objects() {
return array_values(array_filter(array_map(
array($this, 'get_file_object'),
scandir($this->options['upload_dir'])
)));
}
protected function create_scaled_image($file_name, $options) {
$file_path = $this->options['upload_dir'].$file_name;
$new_file_path = $options['upload_dir'].$file_name;
list($img_width, $img_height) = @getimagesize($file_path);
if (!$img_width || !$img_height) {
return false;
}
$scale = min(
$options['max_width'] / $img_width,
$options['max_height'] / $img_height
);
if ($scale >= 1) {
if ($file_path !== $new_file_path) {
return copy($file_path, $new_file_path);
}
return true;
}
$new_width = $img_width * $scale;
$new_height = $img_height * $scale;
$new_img = @imagecreatetruecolor($new_width, $new_height);
switch (strtolower(substr(strrchr($file_name, '.'), 1))) {
case 'jpg':
case 'jpeg':
$src_img = @imagecreatefromjpeg($file_path);
$write_image = 'imagejpeg';
$image_quality = isset($options['jpeg_quality']) ?
$options['jpeg_quality'] : 75;
break;
case 'gif':
@imagecolortransparent($new_img, @imagecolorallocate($new_img, 0, 0, 0));
$src_img = @imagecreatefromgif($file_path);
$write_image = 'imagegif';
$image_quality = null;
break;
case 'png':
@imagecolortransparent($new_img, @imagecolorallocate($new_img, 0, 0, 0));
@imagealphablending($new_img, false);
@imagesavealpha($new_img, true);
$src_img = @imagecreatefrompng($file_path);
$write_image = 'imagepng';
$image_quality = isset($options['png_quality']) ?
$options['png_quality'] : 9;
break;
default:
$src_img = null;
}
$success = $src_img && @imagecopyresampled(
$new_img,
$src_img,
0, 0, 0, 0,
$new_width,
$new_height,
$img_width,
$img_height
) && $write_image($new_img, $new_file_path, $image_quality);
// Free up memory (imagedestroy does not delete files):
@imagedestroy($src_img);
@imagedestroy($new_img);
return $success;
}
protected function validate($uploaded_file, $file, $error, $index) {
if ($error) {
$file->error = $error;
return false;
}
if (!$file->name) {
$file->error = 'missingFileName';
return false;
}
if (!preg_match($this->options['accept_file_types'], $file->name)) {
$file->error = 'acceptFileTypes';
return false;
}
if ($uploaded_file && is_uploaded_file($uploaded_file)) {
$file_size = filesize($uploaded_file);
} else {
$file_size = $_SERVER['CONTENT_LENGTH'];
}
if ($this->options['max_file_size'] && (
$file_size > $this->options['max_file_size'] ||
$file->size > $this->options['max_file_size'])
) {
$file->error = 'maxFileSize';
return false;
}
if ($this->options['min_file_size'] &&
$file_size < $this->options['min_file_size']) {
$file->error = 'minFileSize';
return false;
}
if (is_int($this->options['max_number_of_files']) && (
count($this->get_file_objects()) >= $this->options['max_number_of_files'])
) {
$file->error = 'maxNumberOfFiles';
return false;
}
list($img_width, $img_height) = @getimagesize($uploaded_file);
if (is_int($img_width)) {
if ($this->options['max_width'] && $img_width > $this->options['max_width'] ||
$this->options['max_height'] && $img_height > $this->options['max_height']) {
$file->error = 'maxResolution';
return false;
}
if ($this->options['min_width'] && $img_width < $this->options['min_width'] ||
$this->options['min_height'] && $img_height < $this->options['min_height']) {
$file->error = 'minResolution';
return false;
}
}
return true;
}
protected function upcount_name_callback($matches) {
$index = isset($matches[1]) ? intval($matches[1]) + 1 : 1;
$ext = isset($matches[2]) ? $matches[2] : '';
return ' ('.$index.')'.$ext;
}
protected function upcount_name($name) {
return preg_replace_callback(
'/(?:(?: \(([\d]+)\))?(\.[^.]+))?$/',
array($this, 'upcount_name_callback'),
$name,
1
);
}
protected function trim_file_name($name, $type, $index) {
// Remove path information and dots around the filename, to prevent uploading
// into different directories or replacing hidden system files.
// Also remove control characters and spaces (\x00..\x20) around the filename:
$file_name = trim(basename(stripslashes($name)), ".\x00..\x20");
// Add missing file extension for known image types:
if (strpos($file_name, '.') === false &&
preg_match('/^image\/(gif|jpe?g|png)/', $type, $matches)) {
$file_name .= '.'.$matches[1];
}
if ($this->options['discard_aborted_uploads']) {
while(is_file($this->options['upload_dir'].$file_name)) {
$file_name = $this->upcount_name($file_name);
}
}
return $file_name;
}
protected function handle_form_data($file, $index) {
// Handle form data, e.g. $_REQUEST['description'][$index]
}
protected function orient_image($file_path) {
$exif = @exif_read_data($file_path);
if ($exif === false) {
return false;
}
$orientation = intval(@$exif['Orientation']);
if (!in_array($orientation, array(3, 6, 8))) {
return false;
}
$image = @imagecreatefromjpeg($file_path);
switch ($orientation) {
case 3:
$image = @imagerotate($image, 180, 0);
break;
case 6:
$image = @imagerotate($image, 270, 0);
break;
case 8:
$image = @imagerotate($image, 90, 0);
break;
default:
return false;
}
$success = imagejpeg($image, $file_path);
// Free up memory (imagedestroy does not delete files):
@imagedestroy($image);
return $success;
}
protected function handle_file_upload($uploaded_file, $name, $size, $type, $error, $index) {
$file = new stdClass();
$file->name = $this->trim_file_name($name, $type, $index);
$file->size = intval($size);
$file->type = $type;
if ($this->validate($uploaded_file, $file, $error, $index)) {
$this->handle_form_data($file, $index);
$file_path = $this->options['upload_dir'].$file->name;
$append_file = !$this->options['discard_aborted_uploads'] &&
is_file($file_path) && $file->size > filesize($file_path);
clearstatcache();
if ($uploaded_file && is_uploaded_file($uploaded_file)) {
// multipart/formdata uploads (POST method uploads)
if ($append_file) {
file_put_contents(
$file_path,
fopen($uploaded_file, 'r'),
FILE_APPEND
);
} else {
move_uploaded_file($uploaded_file, $file_path);
}
} else {
// Non-multipart uploads (PUT method support)
file_put_contents(
$file_path,
fopen('php://input', 'r'),
$append_file ? FILE_APPEND : 0
);
}
$file_size = filesize($file_path);
if ($file_size === $file->size) {
if ($this->options['orient_image']) {
$this->orient_image($file_path);
}
$file->url = $this->options['upload_url'].rawurlencode($file->name);
foreach($this->options['image_versions'] as $version => $options) {
if ($this->create_scaled_image($file->name, $options)) {
if ($this->options['upload_dir'] !== $options['upload_dir']) {
$file->{$version.'_url'} = $options['upload_url']
.rawurlencode($file->name);
} else {
clearstatcache();
$file_size = filesize($file_path);
}
}
}
} else if ($this->options['discard_aborted_uploads']) {
unlink($file_path);
$file->error = 'abort';
}
$file->size = $file_size;
$this->set_file_delete_url($file);
}
return $file;
}
public function get() {
$file_name = isset($_REQUEST['file']) ?
basename(stripslashes($_REQUEST['file'])) : null;
if ($file_name) {
$info = $this->get_file_object($file_name);
} else {
$info = $this->get_file_objects();
}
header('Content-type: application/json');
echo json_encode($info);
}
public function post() {
if (isset($_REQUEST['_method']) && $_REQUEST['_method'] === 'DELETE') {
return $this->delete();
}
$upload = isset($_FILES[$this->options['param_name']]) ?
$_FILES[$this->options['param_name']] : null;
$info = array();
if ($upload && is_array($upload['tmp_name'])) {
// param_name is an array identifier like "files[]",
// $_FILES is a multi-dimensional array:
foreach ($upload['tmp_name'] as $index => $value) {
$info[] = $this->handle_file_upload(
$upload['tmp_name'][$index],
isset($_SERVER['HTTP_X_FILE_NAME']) ?
$_SERVER['HTTP_X_FILE_NAME'] : $upload['name'][$index],
isset($_SERVER['HTTP_X_FILE_SIZE']) ?
$_SERVER['HTTP_X_FILE_SIZE'] : $upload['size'][$index],
isset($_SERVER['HTTP_X_FILE_TYPE']) ?
$_SERVER['HTTP_X_FILE_TYPE'] : $upload['type'][$index],
$upload['error'][$index],
$index
);
}
} elseif ($upload || isset($_SERVER['HTTP_X_FILE_NAME'])) {
// param_name is a single object identifier like "file",
// $_FILES is a one-dimensional array:
$info[] = $this->handle_file_upload(
isset($upload['tmp_name']) ? $upload['tmp_name'] : null,
isset($_SERVER['HTTP_X_FILE_NAME']) ?
$_SERVER['HTTP_X_FILE_NAME'] : (isset($upload['name']) ?
$upload['name'] : null),
isset($_SERVER['HTTP_X_FILE_SIZE']) ?
$_SERVER['HTTP_X_FILE_SIZE'] : (isset($upload['size']) ?
$upload['size'] : null),
isset($_SERVER['HTTP_X_FILE_TYPE']) ?
$_SERVER['HTTP_X_FILE_TYPE'] : (isset($upload['type']) ?
$upload['type'] : null),
isset($upload['error']) ? $upload['error'] : null
);
}
header('Vary: Accept');
$json = json_encode($info);
$redirect = isset($_REQUEST['redirect']) ?
stripslashes($_REQUEST['redirect']) : null;
if ($redirect) {
header('Location: '.sprintf($redirect, rawurlencode($json)));
return;
}
if (isset($_SERVER['HTTP_ACCEPT']) &&
(strpos($_SERVER['HTTP_ACCEPT'], 'application/json') !== false)) {
header('Content-type: application/json');
} else {
header('Content-type: text/plain');
}
echo $json;
}
public function delete() {
$file_name = isset($_REQUEST['file']) ?
basename(stripslashes($_REQUEST['file'])) : null;
$file_path = $this->options['upload_dir'].$file_name;
$success = is_file($file_path) && $file_name[0] !== '.' && unlink($file_path);
if ($success) {
foreach($this->options['image_versions'] as $version => $options) {
$file = $options['upload_dir'].$file_name;
if (is_file($file)) {
unlink($file);
}
}
}
header('Content-type: application/json');
echo json_encode($success);
}
}
任何想法，任何帮助都会非常有帮助。提前谢谢。
答案 0 :(得分：0)
您不能将课程加载为helpers：
与CodeIgniter中的大多数其他系统不同，Helpers不是写入的 面向对象的格式。它们是简单的程序功能。每 辅助函数执行一个特定的任务，不依赖于 其他功能。
对于该功能，有libraries：
当我们使用术语“图书馆”时，我们通常指的是 位于libraries目录中并在中描述的类 本用户指南的类参考。但是，在这种情况下，我们会 而是描述如何在自己的库中创建自己的库 application / libraries目录以保持分离 在您的本地资源和全球框架资源之间。
当您使用$this->load->helper()手动加载或将其放入autoload.php的配置数组中时，CodeIgniter正在执行的操作只是转到应用程序文件夹的helpers文件夹并执行include_once更多。
至于库是一回事，但不同之处在于CI会创建库类对象的实例并将其附加到它的当前实例，即主CodeIgniter应用程序实例，即可以使用get_instance()
话虽这么说，当你期望一个对象如来自服务器的json响应但你获得某种html输出时，你得到的是一个常见的问题，在这种情况下，必须是codeigniter错误页。这就是为什么你看到Error SyntaxError: Unexpected token <因为html标签以该符号开头。
打开firefox或chrome开发人员工具并调试服务器响应，在响应中你应该能够看到CodeIgniter的内容（如果有的话），这将是错误页面和错误描述，当然，如果您将环境设置为显示此类错误。
请参阅this other response我在这里了解如何调试错误。