golang implements http server to provide file download function

Introduction

Go (also known as Golang) is a statically strong type, compiled, concurrent programming language developed by Google that has garbage collection functions.

Robert Griesemer, Rob Pike and Ken Thompson began designing Go in September 2007, and later Ian Lance Taylor and Russ Cox joined the project. Go is developed based on the Inferno operating system. Go was officially announced in November 2009 and became an open source project. It was implemented on Linux and Mac OS X platforms, and later added the implementation under Windows system. In 2016, Go was selected as the "TIOBE Best Language of 2016" by software evaluation company TIOBE. Currently, Go releases a secondary version every six months (i.e. from upgrade to).

go is golang, the full name is golang, the abbreviation of go language

golang implements http server to provide file download function, the specific code is as follows:

func FileDownload(w , r *) {
  filename := get_filename_from_request(r)

  file, _ := (filename)
  defer ()

  fileHeader := make([]byte, 512)
  (fileHeader)

  fileStat, _ := ()

  ().Set("Content-Disposition", "attachment; filename=" + filename)
  ().Set("Content-Type", (fileHeader))
  ().Set("Content-Length", ((), 10))

  (0, 0)
  (w, file)

  return
}

ps: Let's take a look at the simplest http server of golang

Simple hello world

package main
import (
 "fmt"
 "io"
 "net/http"
)
func main() {
 ("/", helloWorld)
 e:=(":8888",nil)
 if e!=nil{
 (())
 }
}
func helloWorld(w , r *) {
 str:="Hello World"
 n,e:=(w, str)
 if e!=nil{
 (())
 } else {
 (n," " ,len(str))
 }
}

Summarize

The above is the editor introduced to you that golang implements http server to provide file download function, I hope it will be helpful to everyone!