47 lines
1.7 KiB
C#
47 lines
1.7 KiB
C#
using FileShare_Common.Core;
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using FileShare_Services.Core;
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using QRCoder;
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using System.Net;
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using System.Net.NetworkInformation;
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using System.Net.Sockets;
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namespace FileShare_Services.Services.QrCode
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{
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public sealed class QrCodeService : IQrCodeService
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{
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public Task<object?> GenerateQrCodeAsync(ServiceEndpointContext ctx)
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{
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var ip = GetLanIpAddress();
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if (ip is null)
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throw new InvalidOperationException("无法获取局域网IP地址");
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var url = $"http://{ip}:5206";
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var base64 = GeneratePngBase64(url);
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return Task.FromResult<object?>(ResponseHelper.Ok(new QrCodeResponse(url, base64)));
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}
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private static string GeneratePngBase64(string content)
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{
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using var generator = new QRCodeGenerator();
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using var data = generator.CreateQrCode(content, QRCodeGenerator.ECCLevel.Q);
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using var png = new PngByteQRCode(data);
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var bytes = png.GetGraphic(20);
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return $"data:image/png;base64,{Convert.ToBase64String(bytes)}";
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}
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private static string? GetLanIpAddress()
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{
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return NetworkInterface.GetAllNetworkInterfaces()
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.Where(ni => ni.OperationalStatus == OperationalStatus.Up
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&& ni.NetworkInterfaceType != NetworkInterfaceType.Loopback)
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.SelectMany(ni => ni.GetIPProperties().UnicastAddresses)
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.Select(ua => ua.Address)
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.FirstOrDefault(ip =>
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ip.AddressFamily == AddressFamily.InterNetwork
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&& !IPAddress.IsLoopback(ip)
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&& !ip.ToString().StartsWith("169.254"))
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?.ToString();
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}
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}
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}
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