Client html for uploading file
|
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
</head>
<body>
<form
enctype="multipart/form-data"
action="http://localhost:8080/upload"
method="post"
>
<input type="file" name="myFile" />
<input type="submit" value="upload" />
</form>
</body>
</html>
|
Server
|
package main
import (
"fmt"
"io"
"log"
"net/http"
"os"
)
func uploadFile(w http.ResponseWriter, r *http.Request) {
fmt.Println("File Upload Endpoint Hit")
// Parse our multipart form, 10 << 20 specifies a maximum
// upload of 10 MB files.
r.ParseMultipartForm(10 << 20)
// FormFile returns the first file for the given key `myFile`
// it also returns the FileHeader so we can get the Filename,
// the Header and the size of the file
file, handler, err := r.FormFile("myFile")
if err != nil {
fmt.Println("Error Retrieving the File")
fmt.Println(err)
return
}
defer file.Close()
fmt.Printf("Uploaded File: %+v\n", handler.Filename)
fmt.Printf("File Size: %+v\n", handler.Size)
fmt.Printf("MIME Header: %+v\n", handler.Header)
// Create a temporary file within our temp-images directory that follows
// a particular naming pattern
tempFile, err := os.CreateTemp("temp-images", "upload-*.jpg")
if err != nil {
fmt.Println(err)
}
defer tempFile.Close()
// read all of the contents of our uploaded file into a
// byte array
fileBytes, err := io.ReadAll(file)
if err != nil {
fmt.Println(err)
}
// write this byte array to our temporary file
tempFile.Write(fileBytes)
// return that we have successfully uploaded our file!
fmt.Fprintf(w, "Successfully Uploaded File\n")
}
func sayHello(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hi there!")
}
func setupHandler(mux *http.ServeMux) {
mux.HandleFunc("/", sayHello)
mux.HandleFunc("/upload", uploadFile)
}
func main() {
listenAddr := os.Getenv("LISTEN_ADDR")
if len(listenAddr) == 0 {
listenAddr = ":8080"
}
mux := http.NewServeMux()
setupHandler(mux)
log.Fatal(http.ListenAndServe(listenAddr, mux))
}
|
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