详解php版阿里云OSS图片上传类

  本文实例讲述了php版阿里云OSS图片上传类。分享给大家供大家参考,具体如下:

1.阿里云基本函数

public function putObject($imgPath,$object)
{
  $content = file_get_contents($imgPath); // 把当前文件的内容获取到传入文件中
  $options = array();
  try {
    $this->ossClient->putObject($this->bucket, $object, $content, $options);
  } catch (OssException $e) {
    return $e->getMessage();
  }
  return TRUE;
}

public function uploadFile($imgPath,$object) //$_FILES['img']['tmp_name']
{
  $filePath = $imgPath;
  $options = array();
  try {
    $this->ossClient->uploadFile($this->bucket, $object, $filePath, $options);
  } catch (OssException $e) {
    return $e->getMessage();
  }
  return TRUE;
}
// 删除对象
public function deleteObject($object) {
  try {
    $this->ossClient->deleteObject($this->bucket, $object);
  } catch (OssException $e) {
    return $e->getMessage();
  }
  return TRUE;
}
// 判断对象是否存在
public function doesObjectExist($object) {
  try {
    $result = $this->ossClient->doesObjectExist($this->bucket, $object);
  } catch (OssException $e) {
    return $e->getMessage();
  }
  return $result;
}
// 批量删除对象
public function deleteObjects($objects) {
  try {
    $this->ossClient->deleteObjects($this->bucket, $objects);
  } catch (OssException $e) {
    return $e->getMessage();
  }
  return TRUE;
}

public function getObject($object)
{
  $options = array();
  try {
    $content = $this->ossClient->getObject($this->bucket, $object, $options);
  } catch (OssException $e) {
    return $e->getMessage();
  }
  // file_get_contents
  return $content;
}

2.基本配置与辅助函数

public $ossClient,$bucket;
private $configinfo =  array(
  'maxSize'      => -1,  // 上传文件的最大值
  'supportMulti'   => true,  // 是否支持多文件上传
  'allowExts'     => array(),  // 允许上传的文件后缀 留空不作后缀检查
  'allowTypes'    => array(),  // 允许上传的文件类型 留空不做检查
  'thumb'=> false,  // 使用对上传图片进行缩略图处理
  'imageClassPath'  => 'ORG.Util.Image',  // 图库类包路径
  'thumbMaxWidth'   => '',// 缩略图最大宽度
  'thumbMaxHeight'  => '',// 缩略图最大高度
  'thumbPrefix'    => 'thumb_',// 缩略图前缀
  'thumbSuffix'    => '',
  'thumbPath'     => '',// 缩略图保存路径
  'thumbFile'     => '',// 缩略图文件名
  'thumbExt'     => '',// 缩略图扩展名
  'thumbRemoveOrigin' => false,// 是否移除原图
  'zipImages'     => false,// 压缩图片文件上传
  'autoSub'      => false,// 启用子目录保存文件
  'subType'      => 'hash',// 子目录创建方式 可以使用hash date custom
  'subDir'      => '', // 子目录名称 subType为custom方式后有效
  'dateFormat'    => 'Ymd',
  'hashLevel'     => 1, // hash的目录层次
  'savePath'     => '',// 上传文件保存路径
  'autoCheck'     => true, // 是否自动检查附件
  'uploadReplace'   => false,// 存在同名是否覆盖
  'saveRule'     => 'uniqid',// 上传文件命名规则
  'hashType'     => 'md5_file',// 上传文件Hash规则函数名
  );
// 错误信息
private $error = '';
// 上传成功的文件信息
private $uploadFileInfo ;
public function __get($name){
  if(isset($this->configinfo[$name])) {
    return $this->configinfo[$name];
  }
  return null;
}
public function __set($name,$value){
  if(isset($this->configinfo[$name])) {
    $this->configinfo[$name]  =  $value;
  }
}
public function __isset($name){
  return isset($this->configinfo[$name]);
}

public function __construct($config=array()) {
  if(is_array($config)) {
    $this->config  =  array_merge($this->config,$config);
  }
  $this->bucket = C('OSS_TEST_BUCKET');
  $this->ossClient = new OssClient(C('OSS_ACCESS_ID'), C('OSS_ACCESS_KEY'), C('OSS_ENDPOINT'), false);
}

3.主函数

public function upload($savePath ='') {
  //如果不指定保存文件名,则由系统默认
  if(empty($savePath)) {
    $savePath = $this->savePath;
  }
  $fileInfo  = array();
  $isUpload  = false;
  // 获取上传的文件信息
  // 对$_FILES数组信息处理
  $files  =  $this->dealFiles($_FILES);
  foreach($files as $key => $file) {
    //过滤无效的上传
    if(!empty($file['name'])) {
      //登记上传文件的扩展信息
      if(!isset($file['key']))  $file['key']  =  $key;
      $file['extension'] =  $this->getExt($file['name']);
      $file['savepath']  =  $savePath;
      $file['savename']  =  $this->getSaveName($file);
      // 自动检查附件
      if($this->autoCheck) {
 if(!$this->check($file))
   return false;
      }
      //保存上传文件
      if(!$this->save($file)) return false;
      if(function_exists($this->hashType)) {
 $fun = $this->hashType;
 $file['hash']  = $fun($this->autoCharset($file['savepath'].$file['savename'],'utf-8','gbk'));
      }
      //上传成功后保存文件信息,供其他地方调用
      unset($file['tmp_name'],$file['error']);
      $fileInfo[] = $file;
      $isUpload  = true;
    }
  }
  if($isUpload) {
    $this->uploadFileInfo = $fileInfo;
    return true;
  }else {
    $this->error = '没有选择上传文件';
    return false;
  }
}

4.核心处理函数

private function save($file) {
  $filename = $file['savepath'].$file['savename'];
  if(!$this->uploadReplace && $this->doesObjectExist($filename)) {
    // 不覆盖同名文件
    $this->error  =  '文件已经存在!'.$filename;
    return false;
  }
  // 如果是图像文件 检测文件格式
  if( in_array(strtolower($file['extension']),array('gif','jpg','jpeg','bmp','png','swf'))) {
    $info  = getimagesize($file['tmp_name']);
    if(false === $info || ('gif' == strtolower($file['extension']) && empty($info['bits']))){
      $this->error = '非法图像文件';
      return false;
    }
  }
  if(!$this->putObject($file['tmp_name'], $this->autoCharset($filename,'utf-8','gbk'))) {
    $this->error = '文件上传保存错误!';
    return false;
  }
  if($this->thumb && in_array(strtolower($file['extension']),array('gif','jpg','jpeg','bmp','png'))) {
    $image = getimagesize(C('OSS_IMG_URL').'/'.$filename);
    if(false !== $image) {
      //是图像文件生成缩略图
      $thumbWidth   =  explode(',',$this->thumbMaxWidth);
      $thumbHeight  =  explode(',',$this->thumbMaxHeight);
      $thumbPrefix  =  explode(',',$this->thumbPrefix);
      $thumbSuffix  =  explode(',',$this->thumbSuffix);
      $thumbFile   =  explode(',',$this->thumbFile);
      $thumbPath   =  $this->thumbPath?$this->thumbPath:dirname($filename).'/';
      $thumbExt    =  $this->thumbExt ? $this->thumbExt : $file['extension']; //自定义缩略图扩展名
      // 生成图像缩略图
      import($this->imageClassPath);
      for($i=0,$len=count($thumbWidth); $i<$len; $i++) {
 if(!empty($thumbFile[$i])) {
   $thumbname =  $thumbFile[$i];
 }else{
   $prefix   =  isset($thumbPrefix[$i])?$thumbPrefix[$i]:$thumbPrefix[0];
   $suffix   =  isset($thumbSuffix[$i])?$thumbSuffix[$i]:$thumbSuffix[0];
   $thumbname =  $prefix.basename($filename,'.'.$file['extension']).$suffix;
 }
 $this->thumb(C('OSS_IMG_URL').'/'.$filename,$thumbPath.$thumbname.'.'.$thumbExt,'',$thumbWidth[$i],$thumbHeight[$i],true);
      }
      if($this->thumbRemoveOrigin) {
 // 生成缩略图之后删除原图
 $this->deleteObject($filename);
      }
    }
  }
  if($this->zipImags) {
    // TODO 对图片压缩包在线解压
  }
  return true;
}

public function thumb($image, $thumbname, $type='', $maxWidth=200, $maxHeight=50, $interlace=true) {
  // 获取原图信息
  $info = Image::getImageInfo($image);
  if ($info !== false) {
    $srcWidth = $info['width'];
    $srcHeight = $info['height'];
    $type = empty($type) ? $info['type'] : $type;
    $type = strtolower($type);
    $interlace = $interlace ? 1 : 0;
    unset($info);
    $scale = min($maxWidth / $srcWidth, $maxHeight / $srcHeight); // 计算缩放比例
    if ($scale >= 1) {
      // 超过原图大小不再缩略
      $width = $srcWidth;
      $height = $srcHeight;
    } else {
      // 缩略图尺寸
      $width = (int) ($srcWidth * $scale);
      $height = (int) ($srcHeight * $scale);
    }
    // 载入原图
    $createFun = 'ImageCreateFrom' . ($type == 'jpg' ? 'jpeg' : $type);
    if(!function_exists($createFun)) {
      return false;
    }
    $srcImg = $createFun($image);
    //创建缩略图
    if ($type != 'gif' && function_exists('imagecreatetruecolor'))
      $thumbImg = imagecreatetruecolor($width, $height);
    else
      $thumbImg = imagecreate($width, $height);
     //png和gif的透明处理 by luofei614
    if('png'==$type){
      imagealphablending($thumbImg, false);//取消默认的混色模式(为解决阴影为绿色的问题)
      imagesavealpha($thumbImg,true);//设定保存完整的 alpha 通道信息(为解决阴影为绿色的问题)
    }elseif('gif'==$type){
      $trnprt_indx = imagecolortransparent($srcImg);
if ($trnprt_indx >= 0) {
   //its transparent
   $trnprt_color = imagecolorsforindex($srcImg , $trnprt_indx);
   $trnprt_indx = imagecolorallocate($thumbImg, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
   imagefill($thumbImg, 0, 0, $trnprt_indx);
   imagecolortransparent($thumbImg, $trnprt_indx);
     }
    }
    // 复制图片
    if (function_exists("ImageCopyResampled"))
      imagecopyresampled($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth, $srcHeight);
    else
      imagecopyresized($thumbImg, $srcImg, 0, 0, 0, 0, $width, $height, $srcWidth, $srcHeight);
    // 对jpeg图形设置隔行扫描
    if ('jpg' == $type || 'jpeg' == $type)
      imageinterlace($thumbImg, $interlace);
    imagePNG($thumbImg,'Uploads/file.png'); // 中转站
    // 生成图片
    $this->putObject('Uploads/file.png',$thumbname);
    imagedestroy($thumbImg);
    imagedestroy($srcImg);
    return $thumbname;
  }
  return false;
}

5.辅助函数

private function dealFiles($files) {
    $fileArray = array();
    $n     = 0;
    foreach ($files as $key=>$file){
      if(is_array($file['name'])) {
 $keys    =  array_keys($file);
 $count   =  count($file['name']);
 for ($i=0; $i<$count; $i++) {
   $fileArray[$n]['key'] = $key;
   foreach ($keys as $_key){
     $fileArray[$n][$_key] = $file[$_key][$i];
   }
   $n++;
 }
      }else{
 $fileArray[$key] = $file;
      }
    }
    return $fileArray;
}

private function check($file) {
    if($file['error']!== 0) {
      //文件上传失败
      //捕获错误代码
      $this->error($file['error']);
      return false;
    }
    //文件上传成功,进行自定义规则检查
    //检查文件大小
    if(!$this->checkSize($file['size'])) {
      $this->error = '上传文件大小不符!';
      return false;
    }
    //检查文件Mime类型
    if(!$this->checkType($file['type'])) {
      $this->error = '上传文件MIME类型不允许!';
      return false;
    }
    //检查文件类型
    if(!$this->checkExt($file['extension'])) {
      $this->error ='上传文件类型不允许';
      return false;
    }
    //检查是否合法上传
    if(!$this->checkUpload($file['tmp_name'])) {
      $this->error = '非法上传文件!';
      return false;
    }
    return true;
}
// 自动转换字符集 支持数组转换
private function autoCharset($fContents, $from='gbk', $to='utf-8') {
    $from  = strtoupper($from) == 'UTF8' ? 'utf-8' : $from;
    $to   = strtoupper($to) == 'UTF8' ? 'utf-8' : $to;
    if (strtoupper($from) === strtoupper($to) || empty($fContents) || (is_scalar($fContents) && !is_string($fContents))) {
      //如果编码相同或者非字符串标量则不转换
      return $fContents;
    }
    if (function_exists('mb_convert_encoding')) {
      return mb_convert_encoding($fContents, $to, $from);
    } elseif (function_exists('iconv')) {
      return iconv($from, $to, $fContents);
    } else {
      return $fContents;
    }
}

private function checkType($type) {
    if(!empty($this->allowTypes))
      return in_array(strtolower($type),$this->allowTypes);
    return true;
}

private function checkExt($ext) {
    if(!empty($this->allowExts))
      return in_array(strtolower($ext),$this->allowExts,true);
    return true;
}

private function checkSize($size) {
    return !($size > $this->maxSize) || (-1 == $this->maxSize);
}

private function checkUpload($filename) {
    return is_uploaded_file($filename);
}

private function getExt($filename) {
    $pathinfo = pathinfo($filename);
    return $pathinfo['extension'];
}

public function getUploadFileInfo() {
    return $this->uploadFileInfo;
}

public function getErrorMsg() {
    return $this->error;
}

总结:与普通上传的区别在于,它是全部通过阿里云的oss接口来处理文件保存的。普通上传是把本地文件移动到服务器上,而它则是把文件移动到阿里云服务器上。

缩略图思路:

a.上传图片至服务器
b.获取图片进行处理
c.上传处理好的图片至服务器
d.根据配置,删除或者不删除服务器的原图(OSS)

imagePNG($thumbImg,'Uploads/file.png'); // 中转站
// 生成图片
$this->putObject('Uploads/file.png',$thumbname);
unlink('Uploads/file.png');
imagedestroy($thumbImg);

以上就是详解php版阿里云OSS图片上传类的详细内容,更多请关注考高分网其它相关文章!

posted @ 2022-03-05 23:26  圆柱模板  阅读(711)  评论(0编辑  收藏  举报