Detailed explanation of the implementation method of session in golang

In web development, in order to realize different user logins, we need to use Session for user management. How to use Session in Golang program? This article will introduce the implementation method of Golang Session.

1. What is Session?

Session is a server-side session technology that is widely used in web application development. Session can provide services for clients by storing temporary data on the server to implement user authentication, user management and other functions.

2. Session implementation in Golang

In Golang, we can use third-party libraries to implement Session. The more commonly used ones are Gorilla Session and Gin Session. This article will take Gorilla Session as an example.

2.1 Overview of Gorilla Session

Gorilla Session is a session management tool library based on Cookie and File. It is easy to use and supports storing session data in memory or files.

2.2 Gorilla Session installation

To use Gorilla Session, you need to install Gorilla Toolkit first. You can use the following command to install it:

go get github.com/gorilla/sessions

2.3 Gorilla Session usage

Use Gorilla Session requires the following steps:

(1) Initialize Session storage

In the application, Session storage needs to be initialized. You can use the following code:

store := sessions.NewCookieStore([]byte("cookie-name-here"))

The above code uses Cookie to store the Session. The Cookie stores the Session ID, which has high security.

(2) Create Session

Where you need to create a Session, use the following code to create it:

session, err := store.Get(request, "session-name-here")

session-name-here is the name of the Session, which is required when using it. specified. The Get method will automatically identify the Session ID in the Cookie. If the Session is not found, a new one will be created.

(3) Set the Session value

The method of setting the Session value is relatively simple and can be similar to the map operation:

session.Values["key"] = value

(4) Get the Session value

The method of obtaining the Session value can also be similar to the map operation:

val := session.Values["key"]

(5) Delete the Session value

Deleting the Session value is also very simple:

delete(session.Values, "key")

(6 ) Save Session

When the Session data changes, the Session needs to be saved to storage. You can use the following code:

session.Save(request, response)

Saving Session data requires passing in the current request and response objects.

3. Summary

This article mainly introduces the Session implementation method in Golang, which is implemented by using Gorilla Session as the Session management tool library. Golang Session is simple and flexible to use, suitable for a variety of web application development needs, and is an important knowledge point for learning Golang web development.

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