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How to Download and Save a File from the Internet Using Various Tools and Languages

Ze Mama
By Ze Mama
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How to Download and Save a File from the Internet Using Various Tools and Languages

Downloading and saving files from the internet is a common programming task used in automation, data processing, and web scraping. This article explores how to download files programmatically using different tools and programming languages.

1. Using curl (Command Line)

curl is a versatile command-line tool for transferring data.

Example:

curl -o filename.txt https://example.com/file.txt
  • -o filename.txt: Saves the file as filename.txt.
  • https://example.com/file.txt: URL of the file to download.

For files requiring authentication:

curl -u username:password -o filename.txt https://example.com/protected-file.txt

2. Using wget (Command Line)

wget is another command-line tool designed for downloading files.

See also  How do I reverse a string in Python?

Example:

wget -O filename.txt https://example.com/file.txt
  • -O filename.txt: Saves the file with the specified name.

To download multiple files:

wget -i urls.txt
  • urls.txt: A file containing a list of URLs to download.

3. Using Python

Python provides several libraries for downloading files.

3.1 Using requests

Install the requests library if not already installed:

pip install requests

Example:

python
import requests

url = 'https://example.com/file.txt'
response = requests.get(url)

with open('file.txt', 'wb') as file:
file.write(response.content)

3.2 Using urllib

The urllib module is part of Python’s standard library.

Example:

python
import urllib.request

url = 'https://example.com/file.txt'
urllib.request.urlretrieve(url, 'file.txt')

4. Using Java

Java’s HttpURLConnection and NIO libraries can handle file downloads.

Example:

java
import java.io.*;
import java.net.*;

public class FileDownloader {
public static void main(String[] args) {
String fileURL = "https://example.com/file.txt";
String saveDir = "file.txt";

try (BufferedInputStream in = new BufferedInputStream(new URL(fileURL).openStream());
FileOutputStream fileOutputStream = new FileOutputStream(saveDir)) {
byte[] dataBuffer = new byte[1024];
int bytesRead;
while1 != -1) {
fileOutputStream.write(dataBuffer, 0, bytesRead);
}
System.out.println("File downloaded successfully.");
} catch (IOException e) {
System.out.println("Error: " + e.getMessage());
}
}
}

5. Using C#

C# provides the WebClient and HttpClient classes for downloading files.

Example Using WebClient:

csharp
using System.Net;

class Program
{
static void Main(string[] args)
{
string url = "https://example.com/file

  1. bytesRead = in.read(dataBuffer, 0, 1024 [↩]

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