Microservice authentication and authorization functions implemented in Go language

Microservice authentication and authorization functions implemented in Go language

Introduction

With the popularity of microservice architecture, the need for authentication between microservices Rights and authorization requirements are also gradually increasing. In a microservices architecture, each microservice is independent and they need to be able to identify and authenticate the service that calls them. This article will introduce how to use Go language to implement the authentication and authorization functions of microservices.

The concept of authentication and authorization

In the microservice architecture, authentication and authorization are two different concepts.

Authentication refers to the process of determining a user’s identity. It involves the user providing credentials (such as a username and password) and then the system verifying the correctness of these credentials. Typically, authentication is necessary for each request to determine whether the originator of the request has sufficient authority to operate.

Authorization is the process of determining a user's access rights to specific resources based on the user's identity and permissions. For example, a microservice might only allow users with the "Administrator" role to access certain features. Authorization usually occurs after authentication and is used to determine whether the request is allowed to access the resource.

Steps to implement authentication and authorization

The following are the basic steps to implement microservice authentication and authorization functions:

1. Obtain the requested identity information

When a request reaches the microservice, the identity information of the request needs to be obtained first. Identity information can be passed in various ways, such as request headers, request parameters, etc.

func GetIdentity(r *http.Request) (string, error) {
    // 从请求头中获取身份信息
    identity := r.Header.Get("Authorization")
    if identity == "" {
        return "", errors.New("missing identity")
    }
    return identity, nil
}

The above code snippet demonstrates obtaining identity information from the request header.

2. Verify identity information

After obtaining the identity information, it needs to be verified. The verification method can be by calling the verification service, querying the database or using other methods. The result of the verification should be a Boolean value indicating the validity of the identity information.

func ValidateIdentity(identity string) (bool, error) {
    // 调用验证服务进行身份验证
    result, err := auth.Validate(identity)
    if err != nil {
        return false, err
    }
    return result, nil
}

The above code snippet demonstrates an example of calling the authentication service for authentication.

3. Make authorization judgment

After verifying the identity information, authorization judgment needs to be made based on the user's identity and permissions. Authorization judgment can be made by calling the authorization service, querying the database, or using other methods.

func Authorize(identity string, resource string, action string) (bool, error) {
    // 调用授权服务进行授权判断
    result, err := auth.Authorize(identity, resource, action)
    if err != nil {
        return false, err
    }
    return result, nil
}

The above code snippet demonstrates an example of calling the authorization service for authorization judgment.

4. Authentication and authorization where needed

After obtaining the identity information, verifying the identity information and making authorization judgment through the above steps, we can perform authentication and authorization where needed. These functions are used everywhere.

func HandleRequest(w http.ResponseWriter, r *http.Request) {
    // 获取身份信息
    identity, err := GetIdentity(r)
    if err != nil {
        http.Error(w, "Unauthorized", http.StatusUnauthorized)
        return
    }

    // 验证身份信息
    isValid, err := ValidateIdentity(identity)
    if err != nil || !isValid {
        http.Error(w, "Unauthorized", http.StatusUnauthorized)
        return
    }

    // 授权判断
    isAuthorized, err := Authorize(identity, r.URL.Path, r.Method)
    if err != nil || !isAuthorized {
        http.Error(w, "Forbidden", http.StatusForbidden)
        return
    }

    // 处理请求
    // ...
}

In the above code snippet, we determine whether the request is authenticated and authorized by obtaining identity information, verifying identity information, and making authorization judgments.

Summary

This article introduces how to use Go language to implement the authentication and authorization functions of microservices. By obtaining identity information, verifying identity information and making authorization judgments, authentication and authorization of microservices can be achieved. Authentication and authorization are very important to protect the security of microservices and the integrity of data. I hope this article can help you understand and implement microservice authentication and authorization functions.

Reference

• [https://book.eddycjy.com/golang/gin/auth_jwt.html](https://book.eddycjy.com/golang/gin /auth_jwt.html)
• [https://www.mongodb.com/blog/post/mongodb-go-driver-tutorial](https://www.mongodb.com/blog/post/mongodb -go-driver-tutorial)

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