How to use PHP and Youpai Cloud API to implement multipart upload and resume upload of files

How to use PHP and Youpai Cloud API to implement the functions of multi-part upload and breakpoint resume upload of files

1. Background and introduction

In Web development, file upload is a common functional requirements. For uploading large files, you often encounter some problems, such as network instability, files that are too large, etc. In order to solve these problems, we can use Youpaiyun's API to implement the functions of file uploading in parts and breakpoint resume uploading. This article will introduce how to implement this function through PHP code.

2. Prerequisite configuration

Before you start writing code, you need to ensure that the following preparations have been completed:

1. Register a Youpaiyun account and create a space.
2. Get the Access Key and Secret Key on Youpai Cloud Console.
3. Download Youpaiyun’s PHP SDK and configure it.

3. Implementation of multipart upload

This section will introduce how to use PHP and Youpai Cloud API to implement the multipart upload function of files.

1. Introduce Youpaiyun SDK file:

require_once('upyun-php-sdk/vendor/autoload.php');
use UpyunUpyun;

2. Initialize Upyun client:

$upyun = new Upyun('your_bucket', 'your_operator', 'your_password');

3. Upload file:

$filePath = 'your_file_path';
$fileName = 'your_file_name';
$response = $upyun->writeFile('/' . $fileName, file_get_contents($filePath));

4. Implementation of breakpoint resume upload

In actual applications, file upload may be interrupted due to network instability or other reasons. In order to solve this problem, we can record the information of the uploaded fragments and resume the upload after the upload fails.

The following is an example code for implementing breakpoint resumption:

1. Initialize Upyun client and space path:

$bucket = 'your_bucket';
$operator = 'your_operator';
$password = 'your_password';
$client = new Upyun($bucket, $operator, $password);

2. Check whether the file is Uploaded:

$filePath = 'your_file_path';
$savePath = 'your_save_path';
$fileName = 'your_file_name';
$fileHash = md5_file($filePath);

$response = $client->headFile('/' . $fileName);
if ($response['statusCode'] == 404) {
    // 文件不存在，重新上传
    uploadFile($client, $filePath, $fileName, $savePath);
} else {
    // 文件已存在，检查完整性
    if ($fileHash != $response['x-upyun-file-md5']) {
        // 文件不完整，进行断点续传
        $range = getRange($response);
        uploadFile($client, $filePath, $fileName, $savePath, $range);
    } else {
        // 文件完整，无需上传
        echo "文件已存在，无需上传";
    }
}

3. Breakpoint resume function:

function uploadFile($client, $filePath, $fileName, $savePath, $range = '')
{
    $fileSize = filesize($filePath);

    if ($range) {
        list($offset, $limit) = explode('-', $range);
        $offset = intval($offset);
        $limit = intval($limit);
        $file = fopen($filePath, 'rb');
        fseek($file, $offset);
        $fileContent = fread($file, $limit - $offset + 1);
        fclose($file);
    } else {
        $fileContent = file_get_contents($filePath);
    }

    $response = $client->writeFile('/' . $savePath . '/' . $fileName, $fileContent, true); // 分片上传需要设置为 true
    if ($response['statusCode'] == 200) {
        echo "文件上传成功";
    } else {
        echo "文件上传失败";
    }
}

5. Summary

By using PHP and Youpai Cloud API, We can easily implement the multi-part upload and breakpoint resume upload functions of files. In actual applications, the code can be flexibly modified and expanded according to actual needs to adapt to different scenarios. I hope this article can help readers better understand and apply this feature.

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