goLang web page is not cached

Go language is a very popular programming language that can be used to develop Internet-based web applications and services. However, in some cases, you may find that your Go web application does not cache web pages. In this article, we will explore the causes of this problem and provide solutions to resolve it.

Reasons why Go language web applications do not cache web pages

There are many reasons why Go language web applications may not cache web pages. Here are some of the most common ones:

1. The cache control header is incorrect. Every HTTP response contains a Cache Control header, which instructs the browser whether and for how long the response should be cached. If these headers are not set correctly, browsers will not cache your page.
2. Use HTTPS. If your web application uses HTTPS to communicate, browsers will not cache these pages. This is because HTTPS uses Secure Socket Layer to encrypt data and removes all sensitive data from cache to protect user privacy and security.
3. Dynamically generated content. If your web application uses dynamically generated content, browsers will not cache these pages. This is because cached pages must have the same content, whereas dynamically generated content changes every time.

Solution

Here are some solutions to ensure that your Go web application can cache pages:

1. Set cache control headers . In every HTTP response, appropriate cache control headers should be set. Many commonly used web frameworks and libraries already provide this functionality for you, you just need to make sure the headers are set correctly. For example, you can use the following code to set the cache control header:

func handler(w http.ResponseWriter, r *http.Request) {
    // set cache control header to cache the response for 1 hour
    w.Header().Set("Cache-Control", "max-age=3600, public")
    // other code here
}

2. Use HTTP instead of HTTPS. If you don't need to use HTTPS, then you can use HTTP in your web application to communicate with the browser. This will allow the browser to cache your web pages. However, keep in mind that HTTPS is still required if your web application requires the transmission of sensitive data such as usernames and passwords.
3. Use static content whenever possible. If you use static content for your web pages (such as HTML, CSS, and JavaScript files), the browser will cache these pages and reuse them on subsequent visits. This can effectively reduce the load on the server and improve the loading speed of web pages.
4. Include version information in the URL. If you must use dynamically generated content, then you might consider including version information in the URL. For example, if you are generating a web page with the current timestamp, you can use the following URL: http://example.com/page12345?version=20191223121500. When you update a web page, you just update the timestamp and the browser thinks it's a new page and re-cache it.

Conclusion

In this article, we explored the reasons why Go language web applications do not cache web pages and how to solve this problem. If your web application does not set cache control headers correctly or uses HTTPS, the browser will not cache your page. If you must use dynamically generated content, consider including version information in the URL so browsers can re-cache your page. By taking the right steps, you can ensure that your Go web application can cache pages and increase the speed of web page loading.

The above is the detailed content of goLang web page is not cached. For more information, please follow other related articles on the PHP Chinese website!