Why can't my Go application handle HTTP response headers?

Nowadays, Go language has become one of the popular tools for web application development. However, even when using Go language for web development, there will be problems that the HTTP response header cannot be processed.

So, why does this problem occur? Research has found that there are the following possible reasons:

1. Content-Type is not set correctly

When processing HTTP response headers, many problems are related to the Content-Type setting. Content-Type is used to specify the content type of the data transmitted in the HTTP response. If the Content-Type is not set correctly, the browser may not be able to correctly process the HTTP response header and thus be unable to display the web page properly.

For example, in Go language, the code to set Content-Type to HTML is as follows:

w.Header().Set("Content-Type", "text/html; charset=utf-8")

2. Cross-origin resource sharing (CORS) is not set correctly

CORS is a security mechanism used to restrict access to web resources from different sources. If CORS is not set correctly, the browser may not be able to correctly process the HTTP response header and thus be unable to display the web page properly.

For example, in Go language, the code to set CORS is as follows:

w.Header().Set("Access-Control-Allow-Origin", "*")

3. An incompatible HTTP protocol version is used

HTTP protocol is changed from 1.0 Version 2.0 has different features and usage. If an incompatible HTTP protocol version is used between the server and the client, the browser may not be able to correctly process the HTTP response header and thus be unable to display the web page properly.

For example, in the Go language, the HTTP/1.1 protocol is used by default. If you need to use the HTTP/2 protocol, you need to configure it first:

server := &http.Server{
  Addr:    ":8080",
  Handler: nil,
  TLSConfig: nil,
  // 使用HTTP/2协议
  TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler)),
}

4. Using an incompatible encoding format

Commonly used encoding formats in Web development include gzip and deflate and br et al. If the encoding format is not set correctly, the browser may not be able to correctly process the HTTP response header and thus be unable to display the web page properly.

For example, in the Go language, the code encoded using gzip is as follows:

gzipWriter := gzip.NewWriter(w)
defer gzipWriter.Close()
  
// 将响应写入gzip写入器
gzipWriter.Write(responseBytes)

To sum up, the reason for the problem in processing the HTTP response header may be that the Content-Type is set incorrectly and CORS is not set. , using an incompatible HTTP protocol version, using an incompatible encoding format, etc. For these problems, we only need to find the specific reasons and make corresponding settings to solve the problem.

The above is the detailed content of Why can't my Go application handle HTTP response headers?. For more information, please follow other related articles on the PHP Chinese website!