如何不先保存到public文件夹直接将文件上传至Cloudinary

希望在控制器中直接生成XML文件并上传至Cloudinary，无需先保存到本地public文件夹。当前代码用saveXML()先存本地再上传，尝试直接传SimpleXMLElement对象时报错：缺少必填参数 - file。

当前控制器代码：

public function fatturaxml($id)
{       

    $xml = new SimpleXMLElement('<?xml version="1.0" encoding="utf-8"?><mydoc></mydoc>');

    $xml->addAttribute('version', '1.0');
    $xml->addChild('datetime', date('Y-m-d H:i:s'));

    $person = $xml->addChild('person');
    $person->addChild('firstname', 'Mkenny');
    $person->addChild('secondname', 'Mary');
    $person->addChild('telephone', '000000000');
    $person->addChild('email', 'marymkenny@yahoo.com');

    $xml->saveXML('myxml.xml');

    $response = Response::make($xml->asXML(), 200);
    $response->header('Cache-Control', 'public');
    $response->header('Content-Description', 'File Transfer');
    $response->header('Content-Disposition', 'attachment; filename=test.xml');
    $response->header('Content-Transfer-Encoding', 'binary');
    $response->header('Content-Type', 'text/xml');

    cloudinary()->uploadFile('myxml.xml', ['folder' => 'FolderTest',])->getSecurePath();
}

尝试的错误代码：

cloudinary()->uploadFile($xml, ['folder' => 'FolderTest',])->getSecurePath();

错误提示：缺少必填参数 - file

完全可以实现不存本地直接上传，问题出在uploadFile()不接受SimpleXMLElement对象，它需要文件路径、资源流或者Base64编码字符串这类格式。给你两种可行的实现方式：

方法一：Base64编码XML字符串上传 #

把XML内容转成字符串后做Base64编码，用data: URI格式传给Cloudinary：

public function fatturaxml($id)
{       
    $xml = new SimpleXMLElement('<?xml version="1.0" encoding="utf-8"?><mydoc></mydoc>');

    $xml->addAttribute('version', '1.0');
    $xml->addChild('datetime', date('Y-m-d H:i:s'));

    $person = $xml->addChild('person');
    $person->addChild('firstname', 'Mkenny');
    $person->addChild('secondname', 'Mary');
    $person->addChild('telephone', '000000000');
    $person->addChild('email', 'marymkenny@yahoo.com');

    // 生成XML字符串内容
    $xmlContent = $xml->asXML();
    // 转成Cloudinary支持的data URI格式
    $base64Xml = 'data:text/xml;base64,' . base64_encode($xmlContent);

    // 直接上传到Cloudinary
    $uploadResult = cloudinary()->uploadFile($base64Xml, [
        'folder' => 'FolderTest',
        'public_id' => 'test_xml' // 可选，自定义文件名，不填会自动生成随机名
    ])->getSecurePath();

    // 生成下载响应
    $response = Response::make($xmlContent, 200);
    $response->header('Cache-Control', 'public');
    $response->header('Content-Description', 'File Transfer');
    $response->header('Content-Disposition', 'attachment; filename=test.xml');
    $response->header('Content-Transfer-Encoding', 'binary');
    $response->header('Content-Type', 'text/xml');

    return $response;
}

方法二：临时内存流上传 #

把XML字符串写入PHP临时内存流，再将流对象传给Cloudinary：

public function fatturaxml($id)
{       
    $xml = new SimpleXMLElement('<?xml version="1.0" encoding="utf-8"?><mydoc></mydoc>');

    $xml->addAttribute('version', '1.0');
    $xml->addChild('datetime', date('Y-m-d H:i:s'));

    $person = $xml->addChild('person');
    $person->addChild('firstname', 'Mkenny');
    $person->addChild('secondname', 'Mary');
    $person->addChild('telephone', '000000000');
    $person->addChild('email', 'marymkenny@yahoo.com');

    $xmlContent = $xml->asXML();
    // 创建临时内存流
    $tempStream = fopen('php://temp', 'r+');
    fwrite($tempStream, $xmlContent);
    rewind($tempStream); // 将指针移到流的开头位置

    // 上传流到Cloudinary
    $uploadResult = cloudinary()->uploadFile($tempStream, [
        'folder' => 'FolderTest',
        'public_id' => 'test_xml'
    ])->getSecurePath();

    fclose($tempStream); // 用完记得关闭临时流

    // 生成下载响应
    $response = Response::make($xmlContent, 200);
    $response->header('Cache-Control', 'public');
    $response->header('Content-Description', 'File Transfer');
    $response->header('Content-Disposition', 'attachment; filename=test.xml');
    $response->header('Content-Transfer-Encoding', 'binary');
    $response->header('Content-Type', 'text/xml');

    return $response;
}

关键说明 #

• 两种方法都不需要调用saveXML()存本地，直接用asXML()获取XML字符串在内存中处理。
• Cloudinary的uploadFile()支持多种输入类型，只要把XML内容转换成它能识别的格式就行，不用绕本地文件这一步。

内容的提问来源于stack exchange，提问作者Sarah