我正在尝试为 codeigniter 实现一个多文件上传脚本。脚本可以在这里找到 http://valums.com/ajax-upload/。我觉得很好，所以我决定把当前的应用程序。
问题是，我无法使用 codeigniter 访问上传的文件。如果您是 codeigniter 开发人员，请告知我如何获取脚本发送的文件？
【问题讨论】：
标签： php javascript codeigniter file-upload
CodeIgniter 有几种处理上传的方法，但由于您的 ajax-upload 脚本已经有一个处理程序，您应该使用它。
如何：
在您的应用程序/库文件夹中创建一个名为 Qqfileuploader.php 的新文件并将其粘贴到其中：
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class Qqfileuploader {
private $allowedExtensions = array();
private $sizeLimit = 10485760;
private $file;
function __construct(array $allowedExtensions = array(), $sizeLimit = 10485760){
$allowedExtensions = array_map("strtolower", $allowedExtensions);
$this->allowedExtensions = $allowedExtensions;
$this->sizeLimit = $sizeLimit;
$this->checkServerSettings();
if (isset($_GET['qqfile'])) {
$this->file = new qqUploadedFileXhr();
} elseif (isset($_FILES['qqfile'])) {
$this->file = new qqUploadedFileForm();
} else {
$this->file = false;
}
}
private function checkServerSettings(){
$postSize = $this->toBytes(ini_get('post_max_size'));
$uploadSize = $this->toBytes(ini_get('upload_max_filesize'));
if ($postSize < $this->sizeLimit || $uploadSize < $this->sizeLimit){
$size = max(1, $this->sizeLimit / 1024 / 1024) . 'M';
die("{'error':'increase post_max_size and upload_max_filesize to $size'}");
}
}
private function toBytes($str){
$val = trim($str);
$last = strtolower($str[strlen($str)-1]);
switch($last) {
case 'g': $val *= 1024;
case 'm': $val *= 1024;
case 'k': $val *= 1024;
}
return $val;
}
/**
* Returns array('success'=>true) or array('error'=>'error message')
*/
function handleUpload($uploadDirectory, $replaceOldFile = FALSE){
if (!is_writable($uploadDirectory)){
return array('error' => "Server error. Upload directory isn't writable.");
}
if (!$this->file){
return array('error' => 'No files were uploaded.');
}
$size = $this->file->getSize();
if ($size == 0) {
return array('error' => 'File is empty');
}
if ($size > $this->sizeLimit) {
return array('error' => 'File is too large');
}
$pathinfo = pathinfo($this->file->getName());
$filename = $pathinfo['filename'];
//$filename = md5(uniqid());
$ext = $pathinfo['extension'];
if($this->allowedExtensions && !in_array(strtolower($ext), $this->allowedExtensions)){
$these = implode(', ', $this->allowedExtensions);
return array('error' => 'File has an invalid extension, it should be one of '. $these . '.');
}
if(!$replaceOldFile){
/// don't overwrite previous files that were uploaded
while (file_exists($uploadDirectory . $filename . '.' . $ext)) {
$filename .= rand(10, 99);
}
}
if ($this->file->save($uploadDirectory . $filename . '.' . $ext)){
return array('success'=>true);
} else {
return array('error'=> 'Could not save uploaded file.' .
'The upload was cancelled, or server error encountered');
}
}
}
现在，在您要上传到的控制器中，执行以下操作：
// list of valid extensions, ex. array("jpeg", "xml", "bmp")
$allowedExtensions = array();
// max file size in bytes
$sizeLimit = 10 * 1024 * 1024;
$this->load->library("Qqfileuploader",array($allowedExtensions, $sizeLimit));
$this->Qqfileuploader->handleUpload('uploads/');
// to pass data through iframe you will need to encode all html tags
echo htmlspecialchars(json_encode($result), ENT_NOQUOTES);
这应该工作。
【讨论】：
实际上 CodeIgniter 库似乎只允许将 1 个参数传递给构造函数。所以 Adrian Gonzales 的代码对我来说不太适用 - 我必须更改构造函数以将参数作为单个数组接受（如此处所述：http://codeigniter.com/user_guide/general/creating_libraries.html）。然后就成功了。
这是我的图书馆代码：
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class qqFileUploader {
private $allowedExtensions = array();
private $sizeLimit = 10485760;
private $file;
function __construct($params = array()){
$allowedExtensions = $params['allowedExtensions'];
$sizeLimit = $params['sizeLimit'];
$allowedExtensions = array_map("strtolower", $allowedExtensions);
$this->allowedExtensions = $allowedExtensions;
$this->sizeLimit = $sizeLimit;
$this->checkServerSettings();
if (isset($_GET['qqfile'])) {
$this->file = new qqUploadedFileXhr();
} elseif (isset($_FILES['qqfile'])) {
$this->file = new qqUploadedFileForm();
} else {
$this->file = false;
}
}
private function checkServerSettings(){
$postSize = $this->toBytes(ini_get('post_max_size'));
$uploadSize = $this->toBytes(ini_get('upload_max_filesize'));
if ($postSize < $this->sizeLimit || $uploadSize < $this->sizeLimit){
$size = max(1, $this->sizeLimit / 1024 / 1024) . 'M';
die("{'error':'increase post_max_size and upload_max_filesize to $size'}");
}
}
private function toBytes($str){
$val = trim($str);
$last = strtolower($str[strlen($str)-1]);
switch($last) {
case 'g': $val *= 1024;
case 'm': $val *= 1024;
case 'k': $val *= 1024;
}
return $val;
}
function handleUpload($uploadDirectory, $replaceOldFile = FALSE){
if (!is_writable($uploadDirectory)){
return array('error' => "Server error. Upload directory isn't writable.");
}
if (!$this->file){
return array('error' => 'No files were uploaded.');
}
$size = $this->file->getSize();
if ($size == 0) {
return array('error' => 'File is empty');
}
if ($size > $this->sizeLimit) {
return array('error' => 'File is too large');
}
$pathinfo = pathinfo($this->file->getName());
//$filename = $pathinfo['filename'];
$filename = md5(uniqid());
$ext = $pathinfo['extension'];
if($this->allowedExtensions && !in_array(strtolower($ext), $this->allowedExtensions)){
$these = implode(', ', $this->allowedExtensions);
return array('error' => 'File has an invalid extension, it should be one of '. $these . '.');
}
if(!$replaceOldFile){
/// don't overwrite previous files that were uploaded
while (file_exists($uploadDirectory . $filename . '.' . $ext)) {
$filename .= rand(10, 99);
}
}
if ($this->file->save($uploadDirectory . $filename . '.' . $ext)){
return array('success'=>true, 'fileName' => $filename . '.' . $ext);
} else {
return array('error'=> 'Could not save uploaded file.' .
'The upload was cancelled, or server error encountered');
}
}
}
class qqUploadedFileXhr {
function save($path) {
$input = fopen("php://input", "r");
$temp = tmpfile();
$realSize = stream_copy_to_stream($input, $temp);
fclose($input);
if ($realSize != $this->getSize()){
return false;
}
$target = fopen($path, "w");
fseek($temp, 0, SEEK_SET);
stream_copy_to_stream($temp, $target);
fclose($target);
return true;
}
function getName() {
return $_GET['qqfile'];
}
function getSize() {
if (isset($_SERVER["CONTENT_LENGTH"])){
return (int)$_SERVER["CONTENT_LENGTH"];
} else {
throw new Exception('Getting content length is not supported.');
}
}
}
class qqUploadedFileForm {
/**
* Save the file to the specified path
* @return boolean TRUE on success
*/
function save($path) {
if(!move_uploaded_file($_FILES['qqfile']['tmp_name'], $path)){
return false;
}
return true;
}
function getName() {
return $_FILES['qqfile']['name'];
}
function getSize() {
return $_FILES['qqfile']['size'];
}
}
【讨论】：
花很多时间去/server/php.php文件：https://github.com/valums/file-uploader/blob/master/server/php.php
你必须在你的控制器上重现类似的东西来处理 ajax 脚本的 XMLHttpRequest。
【讨论】：
我找到了一个非常简单的解决方案。
首先，转到脚本，编辑查询字符串变量，以便生成分段 uri。
然后在控制器中，我使用 file_get_contents("php://input") 来获取内容。 要获取文件名，只需 $this->input->uri(3);
【讨论】：