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@xsaamiir
Created March 7, 2019 20:31
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File uploads in Go
package main
import (
"fmt"
"io/ioutil"
"net/http"
)
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 := ioutil.TempFile("temp-images", "upload-*.png")
if err != nil {
fmt.Println(err)
}
defer tempFile.Close()
// read all of the contents of our uploaded file into a
// byte array
fileBytes, err := ioutil.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 setupRoutes() {
http.HandleFunc("/upload", uploadFile)
http.ListenAndServe(":8080", nil)
}
func main() {
fmt.Println("Hello World")
setupRoutes()
}
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