阿里云OSS 通过表单直接上传文件 Post Policy

<?php
$access_id = 'ACCESS_ID';
$access_key = 'OSS_ACCESS_KEY';
$url='http://ioutsider.oss-cn-shenzhen.aliyuncs.com';//更改成你自己的地址
$policy = '{"expiration": "2120-01-01T12:00:00.000Z","conditions":[{"bucket": "ioutsider" },["content-length-range", 0, 104857600]]}';
$policy = base64_encode($policy);
$signature = base64_encode(hash_hmac('sha1', $policy, $access_key, true));//生成认证签名
?>
<!DOCTYPE html>
<html>
    <head>
        <title></title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    </head>
    <body>
        <div>文件上传</div>
        <form action="<?php echo $url;?>" method="post" enctype="multipart/form-data">
            <label for="file">选择文件:</label>
            <input type="hidden" name="OSSAccessKeyId" id="OSSAccessKeyId"  value="<?php echo $access_id; ?>" />
            <input type="hidden" name="policy" id="policy"  value='<?php echo $policy; ?>' />
            <input type="hidden" name="signature" id="signature"  value="<?php echo $signature; ?>" />
            <input type="hidden" name="key" id="key"  value="${filename}" />
            <input type="file" name="file" id="file" />
            <br />
            <input type="submit" name="submit" value="确定" />
        </form>
    </body>
</html>

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