2023-10-29 19:58:20 +13:00
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#region License Information (GPL v3)
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/*
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ShareX - A program that allows you to take screenshots and share any file type
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2024-01-03 12:57:14 +13:00
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Copyright (c) 2007-2024 ShareX Team
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2023-10-29 19:58:20 +13:00
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Optionally you can also view the license at <http://www.gnu.org/licenses/>.
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*/
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#endregion License Information (GPL v3)
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using System;
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using System.Drawing;
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using System.IO;
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using System.Net;
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using System.Net.Http;
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using System.Net.Sockets;
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using System.Text.RegularExpressions;
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using System.Threading.Tasks;
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namespace ShareX.HelpersLib
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{
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public static class WebHelpers
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{
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public static async Task DownloadFileAsync(string url, string filePath)
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{
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if (!string.IsNullOrEmpty(url) && !string.IsNullOrEmpty(filePath))
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{
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FileHelpers.CreateDirectoryFromFilePath(filePath);
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HttpClient client = HttpClientFactory.Create();
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using (HttpResponseMessage responseMessage = await client.GetAsync(url))
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{
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if (responseMessage.IsSuccessStatusCode)
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{
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using (Stream responseStream = await responseMessage.Content.ReadAsStreamAsync())
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using (FileStream fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write))
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{
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await responseStream.CopyToAsync(fileStream);
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}
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}
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}
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}
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}
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public static async Task<string> DownloadStringAsync(string url)
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{
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string response = null;
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if (!string.IsNullOrEmpty(url))
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{
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HttpClient client = HttpClientFactory.Create();
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using (HttpResponseMessage responseMessage = await client.GetAsync(url))
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{
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if (responseMessage.IsSuccessStatusCode)
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{
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response = await responseMessage.Content.ReadAsStringAsync();
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}
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}
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}
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return response;
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}
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public static async Task<Bitmap> DownloadImageAsync(string url)
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{
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Bitmap bmp = null;
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if (!string.IsNullOrEmpty(url))
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{
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HttpClient client = HttpClientFactory.Create();
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using (HttpResponseMessage responseMessage = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead))
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{
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if (responseMessage.IsSuccessStatusCode && responseMessage.Content.Headers.ContentType != null)
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{
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string mediaType = responseMessage.Content.Headers.ContentType.MediaType;
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if (MimeTypes.IsImageMimeType(mediaType))
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{
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byte[] data = await responseMessage.Content.ReadAsByteArrayAsync();
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MemoryStream memoryStream = new MemoryStream(data);
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try
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{
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bmp = new Bitmap(memoryStream);
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}
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catch
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{
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memoryStream.Dispose();
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}
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}
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}
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}
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}
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return bmp;
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}
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public static async Task<string> GetFileNameFromWebServerAsync(string url)
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{
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string fileName = null;
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if (!string.IsNullOrEmpty(url))
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{
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HttpClient client = HttpClientFactory.Create();
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using (HttpRequestMessage requestMessage = new HttpRequestMessage(HttpMethod.Head, url))
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using (HttpResponseMessage responseMessage = await client.SendAsync(requestMessage))
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{
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if (responseMessage.Content.Headers.ContentDisposition != null)
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{
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string contentDisposition = responseMessage.Content.Headers.ContentDisposition.ToString();
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if (!string.IsNullOrEmpty(contentDisposition))
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{
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string fileNameMarker = "filename=\"";
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int beginIndex = contentDisposition.IndexOf(fileNameMarker, StringComparison.OrdinalIgnoreCase);
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contentDisposition = contentDisposition.Substring(beginIndex + fileNameMarker.Length);
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int fileNameLength = contentDisposition.IndexOf("\"");
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fileName = contentDisposition.Substring(0, fileNameLength);
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}
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}
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}
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}
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return fileName;
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}
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2024-03-04 12:26:19 +13:00
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// https://en.wikipedia.org/wiki/Data_URI_scheme
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public static Bitmap DataURLToImage(string url)
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{
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if (!string.IsNullOrEmpty(url) && url.StartsWith("data:", StringComparison.OrdinalIgnoreCase))
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{
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Match match = Regex.Match(url, @"^data:(?<mediaType>[\w\/]+);base64,(?<data>.+)$", RegexOptions.IgnoreCase);
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if (match.Success)
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{
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string mediaType = match.Groups["mediaType"].Value;
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if (MimeTypes.IsImageMimeType(mediaType))
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{
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string data = match.Groups["data"].Value;
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if (!string.IsNullOrEmpty(data))
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{
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try
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{
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byte[] dataBytes = Convert.FromBase64String(data);
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using (MemoryStream ms = new MemoryStream(dataBytes))
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{
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return new Bitmap(ms);
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}
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}
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catch
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{
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}
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}
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}
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}
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}
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return null;
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}
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2024-03-03 05:12:41 +13:00
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public static bool IsSuccessStatusCode(HttpStatusCode statusCode)
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{
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int statusCodeNum = (int)statusCode;
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return statusCodeNum >= 200 && statusCodeNum <= 299;
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}
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2023-10-29 19:58:20 +13:00
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public static int GetRandomUnusedPort()
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{
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TcpListener listener = new TcpListener(IPAddress.Loopback, 0);
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try
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{
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listener.Start();
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return ((IPEndPoint)listener.LocalEndpoint).Port;
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}
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finally
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{
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listener.Stop();
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}
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}
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}
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}
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