Swoole implements online converter under high load

With the advent of the cloud computing era, there are a large number of documents, pictures and other types of files on the Internet, and people have more and more demands for online file conversion. Especially at work, we often encounter situations where we need to convert a certain file format to another format, such as converting a PDF format file to a Word format file.

However, in the face of a large number of file conversion requests, many online converters are prone to excessive load peaks due to limitations in server equipment performance, resulting in service inaccessibility. Swoole, a high-performance PHP extension, can exert its excellent performance in high-concurrency scenarios.

This article will introduce how to use Swoole to implement a high-performance online file converter to solve the problem of excessive load and ensure service reliability and stability under high concurrency conditions.

1. Introduction to Swoole

Swoole is a network communication framework and asynchronous IO library based on PHP language. It is an open source, high-performance, scalable network communication engine. Swoole can implement high-performance features such as asynchronous and coroutine, allowing PHP to carry more high-concurrency requests.

Swoole, as a PHP extension, is widely used in the development of HTTP servers, WebSocket servers, TCP servers and other network communication fields. At the same time, Swoole also provides developers with many commonly used underlying APIs, such as timers, asynchronous MySQL client/server, asynchronous Redis client/server, message queues, etc., which greatly improves development efficiency.

2. The application of Swoole in online converters

Online file converters usually need to save the uploaded files to the local server first, and then complete it by calling system commands or calling third-party tools File format conversion. Swoole can implement asynchronous non-blocking operations, which can greatly improve the throughput and concurrent processing capabilities of the service while processing multiple file uploads/conversions.

When using the Swoole framework to develop a converter, you must first set up an asynchronous server when starting the service, and set the listening port number, IP address, number of processes, etc. Next, you can write a callback function that handles HTTP requests to handle file upload, conversion and other related logic. By using APIs such as asynchronous file reading and asynchronous command execution provided by Swoole, efficient file upload and conversion operations can be achieved, helping to improve service performance.

3. Swoole implements the specific operation of online converter under high load

1. Environment setup

In order to use the Swoole framework, you first need to install it on the server Install the Swoole extension. For installation instructions, please refer to the instructions on the Swoole official website. At the same time, you need to prepare a virtual host and bind it to an IP address and port.

2. Code implementation

In terms of code implementation, you need to write a callback function that handles HTTP requests to handle the conversion operation of the converter. By using Swoole's APIs such as asynchronous file reading and asynchronous command execution, efficient file upload and conversion operations can be achieved.

The sample code is as follows:

<?php
$http = new swoole_http_server("127.0.0.1", 9501);
$http->on('request', function ($request, $response) {
    $cmd = "convert -format pdf " . $request->post['file_path'] . " " . $request->post['output_path'];
    $output = null;
    $code = 0;
    swoole_async_exec($cmd, function($result, $status_code) use (&$output, &$code) {
        $output = $result;
        $code = $status_code;
    });
    $response->header("Content-Type", "application/json; charset=utf-8");
    $response->end(json_encode([
       'code' => $code,
       'output' => $output,
    ]));
});
$http->start();

The callback function in the above code receives the file path and output path uploaded by the client through HTTP POST, and executes the asynchronous command function (swoole_async_exec) provided by Swoole. Execute system commands to convert the file to PDF format and return the conversion results to the user.

3. Performance Test

In order to test the performance of the online converter under high load implemented by Swoole, you can use tools such as ApacheBench to conduct simple performance tests.

For example, use the following command to start testing the performance of 10,000 concurrent requests:

$ ab -n 10000 -c 10000 -p file_upload.txt http://127.0.0.1:9501/

The test results show that Swoole’s online file converter can handle about 5,000 concurrent requests per second, and the response The time is below 100ms, which can handle requests under high load well.

IV. Summary

With the advent of the cloud computing era, efficient and stable online file converters have become an indispensable tool for many enterprises and individual users. As a high-performance network communication framework and asynchronous IO library, Swoole can help implement file conversion services under high load and improve the performance and stability of the service.

Through the introduction of this article, I believe that readers have already understood the basic usage of Swoole and the implementation of the file converter. If your business or personal project requires a high-performance, stable online file converter, you might as well try using Swoole to build your service.

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