#region License Information (GPL v3)
/*
ShareX - A program that allows you to take screenshots and share any file type
Copyright (c) 2007-2023 ShareX Team
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Optionally you can also view the license at .
*/
#endregion License Information (GPL v3)
using System;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Sockets;
using System.Threading.Tasks;
namespace ShareX.HelpersLib
{
public static class WebHelpers
{
public static async Task DownloadFileAsync(string url, string filePath)
{
if (!string.IsNullOrEmpty(url) && !string.IsNullOrEmpty(filePath))
{
FileHelpers.CreateDirectoryFromFilePath(filePath);
HttpClient client = HttpClientFactory.Create();
using (HttpResponseMessage responseMessage = await client.GetAsync(url))
{
if (responseMessage.IsSuccessStatusCode)
{
using (Stream responseStream = await responseMessage.Content.ReadAsStreamAsync())
using (FileStream fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write))
{
await responseStream.CopyToAsync(fileStream);
}
}
}
}
}
public static async Task DownloadStringAsync(string url)
{
string response = null;
if (!string.IsNullOrEmpty(url))
{
HttpClient client = HttpClientFactory.Create();
using (HttpResponseMessage responseMessage = await client.GetAsync(url))
{
if (responseMessage.IsSuccessStatusCode)
{
response = await responseMessage.Content.ReadAsStringAsync();
}
}
}
return response;
}
public static async Task DownloadImageAsync(string url)
{
Bitmap bmp = null;
if (!string.IsNullOrEmpty(url))
{
HttpClient client = HttpClientFactory.Create();
using (HttpResponseMessage responseMessage = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead))
{
if (responseMessage.IsSuccessStatusCode && responseMessage.Content.Headers.ContentType != null)
{
string mediaType = responseMessage.Content.Headers.ContentType.MediaType;
string[] supportedImageTypes = new string[]
{
"image/png",
"image/jpeg",
"image/gif",
"image/bmp",
"image/tiff"
};
if (supportedImageTypes.Contains(mediaType, StringComparer.OrdinalIgnoreCase))
{
byte[] data = await responseMessage.Content.ReadAsByteArrayAsync();
MemoryStream memoryStream = new MemoryStream(data);
try
{
bmp = new Bitmap(memoryStream);
}
catch
{
memoryStream.Dispose();
}
}
}
}
}
return bmp;
}
public static async Task GetFileNameFromWebServerAsync(string url)
{
string fileName = null;
if (!string.IsNullOrEmpty(url))
{
HttpClient client = HttpClientFactory.Create();
using (HttpRequestMessage requestMessage = new HttpRequestMessage(HttpMethod.Head, url))
using (HttpResponseMessage responseMessage = await client.SendAsync(requestMessage))
{
if (responseMessage.Content.Headers.ContentDisposition != null)
{
string contentDisposition = responseMessage.Content.Headers.ContentDisposition.ToString();
if (!string.IsNullOrEmpty(contentDisposition))
{
string fileNameMarker = "filename=\"";
int beginIndex = contentDisposition.IndexOf(fileNameMarker, StringComparison.OrdinalIgnoreCase);
contentDisposition = contentDisposition.Substring(beginIndex + fileNameMarker.Length);
int fileNameLength = contentDisposition.IndexOf("\"");
fileName = contentDisposition.Substring(0, fileNameLength);
}
}
}
}
return fileName;
}
public static int GetRandomUnusedPort()
{
TcpListener listener = new TcpListener(IPAddress.Loopback, 0);
try
{
listener.Start();
return ((IPEndPoint)listener.LocalEndpoint).Port;
}
finally
{
listener.Stop();
}
}
}
}