FTP Client
To create an FTP client program in Go, you need to create a few files: main.go for the main logic and optionally, a client.go file for the client functionality. Here is a step-by-step guide:
Step 1: Initialize the Go Module
First, create a new directory for your project and initialize the Go module.
mkdir ftpclient
cd ftpclient
go mod init github.com/username/ftpclient
Step 2: Create the client.go File
Create a client.go file to handle the FTP client functionality.
// client.go
package main
import (
"fmt"
"github.com/jlaffaye/ftp"
"io/ioutil"
"log"
)
// FetchFile fetches the content of the specified file from the FTP server.
func FetchFile(server, user, password, filePath string) (string, error) {
conn, err := ftp.Dial(server)
if err != nil {
return "", err
}
defer conn.Quit()
if err := conn.Login(user, password); err != nil {
return "", err
}
resp, err := conn.Retr(filePath)
if err != nil {
return "", err
}
defer resp.Close()
body, err := ioutil.ReadAll(resp)
if err != nil {
return "", err
}
return string(body), nil
}
Step 3: Create the main.go File
Create a main.go file to use the client functionality.
// main.go
package main
import (
"fmt"
"os"
)
func main() {
if len(os.Args) != 5 {
fmt.Println("Usage: ftpclient <server> <user> <password> <filePath>")
os.Exit(1)
}
server := os.Args[1]
user := os.Args[2]
password := os.Args[3]
filePath := os.Args[4]
content, err := FetchFile(server, user, password, filePath)
if err != nil {
fmt.Printf("Failed to fetch file %s: %v\n", filePath, err)
os.Exit(1)
}
fmt.Printf("Content of %s:\n%s\n", filePath, content)
}
Step 4: Run the Program
Run the program using the go run command.
go run main.go ftp.example.com username password /path/to/file.txt
This will fetch and print the content of the specified file from the FTP server.
Last modified: 19 December 2024