How to build cloud-native web applications using C++?

Building a cloud-native web application using C++ involves the following steps: Create a new project and add the necessary libraries. Write business logic and create HTTP routes. Use Dockerfile to create container images. Build and push the image to the registry. Deploy applications on Kubernetes.

How to build cloud-native web applications using C++

Introduction

Cloud-native web applications are being Becoming mainstream in software development, C++ has become an ideal choice for building such applications due to its high performance and efficiency. This article will guide you through building a cloud-native web application from scratch using C++ and modern toolchains.

Create Project

1. Create a new project using CMake:

   cmake_minimum_required(VERSION 3.10)
   project(myapp)

2. Add the necessary libraries :

   find_package(cpprestsdk REQUIRED)

Write business logic

Create main.cpp file and write your business logic:

#include <cpprest/http_listener.h>
#include <cpprest/json.h>

using namespace web;
using namespace http;
using namespace json;

int main()
{
  // 创建HTTP监听器
  http_listener listener("http://localhost:8080");

  // 注册路由
  listener.support(methods::GET, "/hello", [](http_request request) {
    // 返回JSON响应
    request.reply(status_codes::OK, value::object({"message": "Hello, world!"}));
  });

  // 监听HTTP请求
  listener.open().wait();

  return 0;
}

Deploy to the cloud

1. Use Dockerfile to create a container image:

   FROM ubuntu:latest
   
   RUN apt-get update && apt-get install -y libcpprest0 libcpprest-dev
   
   COPY . /app
   
   WORKDIR /app
   
   CMD ["myapp"]

2. Build and push to the registry :

   docker build -t myapp .
   docker push myapp

3. Deploy on Kubernetes:

   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: myapp
   spec:
     replicas: 1
     selector:
    matchLabels:
      app: myapp
     template:
    metadata:
      labels:
        app: myapp
    spec:
      imagePullSecrets:
        - name: myregistrykey
      containers:
        - name: myapp
          image: myapp
          ports:
            - containerPort: 8080

Practical case

Build using this tutorial The application is a simple "Hello, World!" service. You can get the message by making an HTTP request using your browser or cURL.

Conclusion

By following this guide, you will be able to master the skills needed to build cloud-native web applications using C++. This article covers the entire development lifecycle, from creating a new project to deploying the application to production.

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