Let's talk about golang's repeated request problem

Golang is a very popular programming language and also plays an important role in web application development. In the process of using Golang for web development, we often encounter the problem of repeated requests. Although this problem can be solved in principle, some techniques and tools may be needed to solve this problem in actual development.

1. What is a duplicate request

Duplicate request means that when the client sends a request to the server, the same request is sent multiple times due to some reasons. This may lead to some undesirable consequences, such as waste of server resources, impact on clients, etc.

2. Why duplicate requests occur

Duplicate requests are often caused by network delays, long server response times, client code problems, etc. In the process of using Golang for web development, we need to pay special attention to this issue so as not to affect the performance and user experience of the application.

3. How to solve the problem of repeated requests

1. Use HTTP caching

HTTP caching is one of the simplest and most effective ways to avoid repeated requests. Indicate whether the client request needs to be saved in the cache by setting the cache control header, and tell the client when the cache needs to be updated. In this way, the same request will only be sent once, thus avoiding the problem of repeated requests.

2. Using locks on the client

Lock is a technology used to solve shared resource access conflicts in concurrent programming. In web applications, we can use client-side locks, such as "anti-shake" and "throttle" technologies in JavaScript. These techniques can suppress a request for a certain period of time, thereby avoiding the problem of repeated requests. However, it should be noted that this approach does not completely solve the problem of duplicate requests and may affect the performance of the application.

3. Using locks on the server side

On the server side, we can use locks to ensure that only one request is processed at the same time, thereby avoiding the problem of repeated requests. However, it should be noted that in high concurrency situations, using locks may affect application performance.

4. Use unique identifiers

For some stateful requests, we can generate a unique identifier for each request. When receiving a request with the same identifier, we can directly return the previously saved result to avoid repeated requests. This method requires processing on the server side, but can be very effective in some scenarios.

4. Summary

Duplicate requests are a common problem in web applications, and it is also a problem that requires special attention. In the process of using Golang for web development, we need to pay attention to this problem and take corresponding measures to avoid its adverse impact on application performance and user experience. In addition to the methods mentioned above, we can also use some tools to solve this problem, such as Hystrix, Zuul, etc.

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