func postFile(filename string,targetUrl string) error {
bodyBuf :=&bytes.Buffer()
bodyWriter :=multipart.NewWriter(bodyBuf)
fileWriter,err := bodyWriter.CreateFormFile("uploadfile",filename)
if err != nil {
fmt.Println("error writing to buffer")
return err
}
fh,err := os.Open(filename)
if err != nil {
fmt.Println("error opening file")
return err
}
_,err = io.Copy(fileWriter,fh)
if err != nil {
return err
}
contentType := bodyWriter.FormDataContentType()
bodyWriter.Close()
resp,err := http.Post(targetUrl,contentType,bodyBuf)
if err != nil {
return err
}
def resp.Body.Close()
resp_body , err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
fmt.Println(resp.Status)
fmt.Println(string(resp_body))
return nil
}
func ExampleValidateFunc() {
ui := &UI{
// In real world, Reader is os.Stdin and input comes
// from user actual input
Reader: bytes.Buffer("Y\n"),
Writer: ioutil.Discard,
}
query := "Do you love golang [Y/n]"
ans, _ := Ask(query, &Options{
// Define validateFunc to validate user input is
// 'Y' or 'n'. If not returns error.
ValidateFunc: func(s string) error {
if s != "Y" && s != "n" {
return fmt.Errorf("input must be Y or n")
}
return nil
},
})
fmt.Println(ans)
// Output: Y
}