How to save the result of code generation to the archive and immediately give it away?

Question

go

Hello.
There is a rest API, when accessing a certain endpoint, it is planned to do several code generations, and put the results in the form of ready-made files into an archive and give them to the requested one. How to save the result of code generation to the archive and immediately give it away?

Answer 1

https://golang.org/pkg/archive/zip/
Single file example:

func handle(w http.ResponseWriter, r *http.Request){
  fileToZip, _ := os.Open("filepath")
  defer fileToZip.Close()

  // NewWriter returns a new Writer writing a zip file to w.
  zipWriter := zip.NewWriter(w)
  defer zipWriter.Close()

  info, _ := fileToZip.Stat()

  header, _ := zip.FileInfoHeader(info)

  // Change to deflate to gain better compression
  // see http://golang.org/pkg/archive/zip/#pkg-constants
  header.Method = zip.Deflate

  // CreateHeader adds a file to the zip archive using the provided FileHeader
  // for the file metadata. 
  // This returns a Writer to which the file contents should be written.
  writer, _ := zipWriter.CreateHeader(header)
  io.Copy(writer, fileToZip)
}