How to use PHP and Youpai Cloud API to implement the resume function of cloud storage

How to use PHP and Youpai Cloud API to implement the resume function of cloud storage

Cloud storage plays an important role in website and application development. It can help us store and manage large amounts of data while providing reliable access and backup mechanisms. Resume uploading is a very useful feature that allows users to upload large files without having to start over when there is a network outage or other abnormal circumstances.

Youpaiyun is a well-known cloud storage service provider in China. They provide a wealth of APIs to help developers implement various functions. In this article, we will introduce how to use PHP and Youpai Cloud API to implement the resume function of cloud storage.

First of all, we need to register an account on Youpaiyun’s official website and create a new storage space. When creating a storage space, we need to write down the space name, operator name, and operator password. This information will be used for subsequent API calls.

Next, we need to install the CURL extension for PHP. This extension will help us make HTTP requests to communicate with Youpai Cloud API. If your PHP version is 7.0 and above, the CURL extension is usually enabled by default. If it is not enabled, you can uncomment the "CURL" extension in the php.ini configuration file.

The following are the detailed steps for using PHP and Youpai Cloud API to implement the resumable upload function of cloud storage:

1. Introducing the API class library file

require_once 'upyun.class.php';

2. Initialize UpYun object

$bucketname = 'your_bucket_name'; // 存储空间名称
$username = 'your_operator_name'; // 操作员名称
$password = 'your_operator_password'; // 操作员密码

$upyun = new UpYun($bucketname, $username, $password);

3. Set upload file and path

$local_file = 'path/to/local_file'; // 本地文件路径
$remote_file = 'path/to/remote_file'; // 云存储文件路径

4. Breakpoint resume upload

if(file_exists($local_file)){
    $file_size = filesize($local_file);
    $x_upyun_multi_stage = "true";
    $x_upyun_multi_length = $file_size;
    $x_upyun_multi_index = $file_size - 1;
} else {
    echo "File not found!";
    exit;
}

$headers = array(
    'Content-Length' => $file_size,
    'x-upyun-multi-stage' => $x_upyun_multi_stage,
    'x-upyun-multi-length' => $x_upyun_multi_length,
    'x-upyun-multi-index' => $x_upyun_multi_index
);

$fh = fopen($local_file, 'rb');
$upyun->write($remote_file, $fh, $headers);
fclose($fh);

Through the above code, we initialized an UpYun object and set the name of the storage space, operator name and password. Then, we specified the paths to local files and cloud storage. In the part of resuming the upload, we first check whether the local file exists, then obtain the file size, and set the corresponding HTTP header information. Finally, we open the local file and write the file contents to cloud storage using the write() method.

Now, we have implemented the breakpoint resume function using PHP and Youpai Cloud API. We can try to upload a large file and perform the upload operation again after it is terminated or disconnected. Youpaiyun API will find the breakpoint location based on the previous upload record and continue to upload the remaining parts.

During the development process, we can also optimize and improve the upload process according to specific needs. For example, you can add a progress bar to show the upload progress, add an error handling mechanism, etc.

Summary:

Resumable download is one of the important functions of cloud storage. By using PHP and Youpai Cloud API, we can easily implement the resume function to improve user experience. Youpaiyun provides rich API documentation and sample code to help us better understand and use their services. I hope this article will help you understand how to use PHP and Youpai Cloud API to implement the resume function of cloud storage.

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