Codeigniter+flash实现Avatar头像上传的程序

//重新设置session(防止新传头像无法显示)
$this->session->set_userdata('user_info',$user_info);
 
//项目决对路径
$base_path = rtrim(str_replace('＼＼','/', FCPATH),'/');
 
require APPPATH.'libraries/avatar.class.php';
 
$au = new avatar($base_path.'/uploads/user/'.$user_info['mid'].'/',$base_path.'/uploads/user/temp/','/uploads/user/','/faceapi/');
if(!$user_info['face']){
    $uid = 'uface_'.$user_info['mid'];
}else{
    $uid = $user_info['face'];
}
 
$this->data['urlAvatarBig']   = $user_info['face'] ? $au->getAvatarUrl($uid,'big') : (($this->user_info['sex']==0 )? static_url().'/uploads/user/dfgirl.png' : static_url().'/uploads/user/dfboy.png' );
$this->data['urlCameraFlash'] = $au->renderHtml($uid);
$this->data['uid'] = $uid;//头像标示
$this->load->view('center/member/edit_face',$this->data);

class avatar{
 public $savePath;
 public $tempPath;
 public $viewPath;
 public $urlPath;
 public $mid;
 public function __construct($savePath,$tempPath,$viewPath,$urlPath,$mid){
  $this->savePath=$savePath;
  $this->tempPath=$tempPath;
  $this->viewPath='http://'.$_SERVER['HTTP_HOST'].$viewPath;
  $this->urlPath='http://'.$_SERVER['HTTP_HOST'].$urlPath;
  $this->mid = $mid;

 }
 // 第一步：上传原始图片文件
 private function uploadAvatar($uid){
  // 检查上传文件的有效性
  if(empty($_FILES['Filedata'])){
   return -3; // No photograph be upload!
  }
  // 本地临时存储位置
  $tmpPath = $this->tempPath."{$uid}.jpg";
  // 如果临时存储的文件夹不存在，先创建它
  $dir=dirname($tmpPath);
  if(!file_exists($dir)){
   @mkdir($dir,0777, true );
  }
  // 如果同名的临时文件已经存在，先删除它
  if(file_exists($tmpPath)){
   @unlink($tmpPath);
  }
  // 把上传的图片文件保存到预定位置
  if ( @copy($_FILES['Filedata']['tmp_name'], $tmpPath) || @move_uploaded_file($_FILES['Filedata']['tmp_name'], $tmpPath)) {
   @unlink($_FILES['Filedata']['tmp_name']);
   list($width, $height, $type, $attr) = getimagesize($tmpPath);
   if ( $width < 10 || $height < 10 || $width > 3000 || $height > 3000 || $type == 4 ) {
    @unlink($tmpPath);
    return -2; // Invalid photograph!
   }
  } else {
   @unlink($_FILES['Filedata']['tmp_name']);
   return -4; // Can not write to the data/tmp folder!
  }

  // 用于访问临时图片文件的 url
  $tmpUrl =$this->viewPath."temp/{$uid}.jpg";
  return $tmpUrl;
 }
 private function flashdata_decode($s) {
  $r = '';
  $l = strlen($s);
  for($i=0; $i<$l; $i=$i+2) {
   $k1 = ord($s[$i]) - 48;
   $k1 -= $k1 > 9 ? 7 : 0;
   $k2 = ord($s[$i+1]) - 48;
   $k2 -= $k2 > 9 ? 7 : 0;
   $r .= chr($k1 << 4 | $k2);
  }
  return $r;
 }

 // 第二步：上传分割后的三个图片数据流
 private function rectAvatar( $uid ){
  // 从 $_POST 中提取出三个图片数据流
  $bigavatar    = $this->flashdata_decode( $_POST['avatar1'] );
  $middleavatar = $this->flashdata_decode( $_POST['avatar2'] );
  if ( !$bigavatar || !$middleavatar) {
   return '';
  }
  
  //不存在目录，则创建
  if(!file_exists($this->savePath)){
   @mkdir($this->savePath,0777, true );
  }

  // 保存为图片文件
  $bigavatarfile    = $this->savePath."{$uid}_big.jpg";
  $middleavatarfile = $this->savePath."{$uid}_middle.jpg";

  $success = 1;
  $fp = @fopen($bigavatarfile, 'wb');
  @fwrite($fp, $bigavatar);
  @fclose($fp);

  $fp = @fopen($middleavatarfile, 'wb');
  @fwrite($fp, $middleavatar);
  @fclose($fp);

  // 验证图片文件的正确性
  $biginfo    = @getimagesize($bigavatarfile);
  $middleinfo = @getimagesize($middleavatarfile);
  if ( !$biginfo || !$middleinfo || $biginfo[2] == 4 || $middleinfo[2] == 4 ) {
   file_exists($bigavatarfile) && unlink($bigavatarfile);
   file_exists($middleavatarfile) && unlink($middleavatarfile);
   $success = 0;
  }
  // 删除临时存储的图片
  $tmpPath = $this->tempPath."{$uid}.jpg";
  @unlink($tmpPath);
  //临时保存头像
  $con=mysql_connect('localhost','root','root');
  mysql_select_db('zenyue');
  mysql_query("set names utf8");
  $sql="update zen_user set `face`='".$uid."' where mid='".$this->mid."'";
  mysql_query($sql);
  return '';
 }
 // 从客户端访问头像图片的 url
 public function getAvatarUrl( $uid, $size='middle' ){
  $ci = &get_instance();
  $user_info = $ci->session->userdata('user_info');
  return $this->viewPath."{$user_info['mid']}/{$uid}_{$size}.jpg";
 }
 // 处理 HTTP Request
 // 返回值：如果是可识别的 request，处理后返回 true；否则返回 false。
 public function processRequest(){
  // 从 input 参数里拆解出自定义参数
  $arr = array();
  parse_str( $_GET['input'], $arr );
  $uid = $arr['uid'];
  if ( $_GET['a'] == 'uploadavatar') {
   // 第一步：上传原始图片文件
   echo $this->uploadAvatar( $uid );
   return true;
  } else if ( $_GET['a'] == 'rectavatar') {
   // 第二步：上传分割后的三个图片数据流
   echo $this->rectAvatar( $uid );
   return true;
  }
  return false;
 }
 // 编辑页面中包含 camera.swf 的 HTML 代码
 public function renderHtml( $uid ){
  // 把需要回传的自定义参数都组装在 input 里
  $ci = &get_instance();
  $user_info = $ci->session->userdata('user_info');
  $input = urlencode("uid={$uid}&FSESSIONID=".session_id().'&mid='.$user_info['mid']);
  $baseUrl = '/public/zen/js/avatar/';
  $uc_api = urlencode( $this->urlPath.'avatar.php');
  $urlCameraFlash = "{$baseUrl}camera.swf?m=user&inajax=1&appid=1&ucapi={$uc_api}&input={$input}&uploadSize=2048";
  $urlCameraFlash = '';
  return $urlCameraFlash;
 }
}