UpdateBackupFolderSettings.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
using Waher.Content;
using Waher.Content.Text;
using Waher.Networking.HTTP;
using Waher.Runtime.IO;
 
namespace Waher.IoTGateway.WebResources
{
    public class UpdateBackupFolderSettings : HttpSynchronousResource, IHttpPostMethod
    {
        public UpdateBackupFolderSettings()
            : base("/UpdateBackupFolderSettings")
        {
        }
 
        public override bool HandlesSubPaths => false;
 
        public override bool UserSessions => true;
 
        public bool AllowsPOST => true;
 
        public async Task POST(HttpRequest Request, HttpResponse Response)
        {
            Gateway.AssertUserAuthenticated(Request, "Admin.Data.Backup");
 
            if (!Request.HasData)
            {
                await Response.SendResponse(new BadRequestException());
                return;
            }
 
            ContentResponse Content = await Request.DecodeDataAsync();
 
            if (Content.HasError ||
                !(Content.Decoded is Dictionary<string, object> Form) ||
                !Form.TryGetValue("ExportFolder", out object Obj) || !(Obj is string ExportFolder) ||
                !Form.TryGetValue("KeyFolder", out Obj) || !(Obj is string KeyFolder) ||
                !Form.TryGetValue("BackupHosts", out Obj) || !(Obj is string BackupHostsStr) ||
                !Form.TryGetValue("KeyHosts", out Obj) || !(Obj is string KeyHostsStr))
            {
                await Response.SendResponse(new BadRequestException());
                return;
            }
 
 
            ExportFolder = ExportFolder.Trim();
            KeyFolder = KeyFolder.Trim();
 
            string[] BackupHosts = BackupHostsStr.Split(',');
            string[] KeyHosts = KeyHostsStr.Split(',');
            int Len;
 
            Trim(BackupHosts);
            Trim(KeyHosts);
 
            Len = ExportFolder.Length;
            if (Len > 0 && (ExportFolder[Len - 1] == '/' || ExportFolder[Len - 1] == '\\'))
                ExportFolder = ExportFolder[..(Len - 1)];
 
            Len = KeyFolder.Length;
            if (Len > 0 && (KeyFolder[Len - 1] == '/' || KeyFolder[Len - 1] == '\\'))
                KeyFolder = KeyFolder[..(Len - 1)];
 
            if (!string.IsNullOrEmpty(ExportFolder))
            {
                if (!Path.IsPathRooted(ExportFolder))
                {
                    Response.StatusCode = 400;
                    Response.StatusMessage = "Bad Request";
                    Response.ContentType = PlainTextCodec.DefaultContentType;
                    await Response.Write("Export folder must be rooted. Relative paths are not accepted.");
                    await Response.SendResponse();
                    return;
                }
 
                if (!Directory.Exists(ExportFolder))
                {
                    Response.StatusCode = 400;
                    Response.StatusMessage = "Bad Request";
                    Response.ContentType = PlainTextCodec.DefaultContentType;
                    await Response.Write("Export folder does not exist, or cannot be accessed or reached.");
                    await Response.SendResponse();
                    return;
                }
 
                try
                {
                    string s = ExportFolder + Path.DirectorySeparatorChar + "test.txt";
                    await Files.WriteAllTextAsync(s, "test");
                    File.Delete(s);
                }
                catch (Exception)
                {
                    Response.StatusCode = 400;
                    Response.StatusMessage = "Bad Request";
                    Response.ContentType = PlainTextCodec.DefaultContentType;
                    await Response.Write("Not allowed to write data to the export folder.");
                    await Response.SendResponse();
                    return;
                }
            }
 
            if (!string.IsNullOrEmpty(KeyFolder))
            {
                if (!Path.IsPathRooted(KeyFolder))
                {
                    Response.StatusCode = 400;
                    Response.StatusMessage = "Bad Request";
                    Response.ContentType = PlainTextCodec.DefaultContentType;
                    await Response.Write("Key folder must be rooted. Relative paths are not accepted.");
                    await Response.SendResponse();
                    return;
                }
 
                if (!Directory.Exists(KeyFolder))
                {
                    Response.StatusCode = 400;
                    Response.StatusMessage = "Bad Request";
                    Response.ContentType = PlainTextCodec.DefaultContentType;
                    await Response.Write("Key folder does not exist, or cannot be accessed or reached.");
                    await Response.SendResponse();
                    return;
                }
 
                try
                {
                    string s = KeyFolder + Path.DirectorySeparatorChar + "test.txt";
                    await Files.WriteAllTextAsync(s, "test");
                    File.Delete(s);
                }
                catch (Exception)
                {
                    Response.StatusCode = 400;
                    Response.StatusMessage = "Bad Request";
                    Response.ContentType = PlainTextCodec.DefaultContentType;
                    await Response.Write("Not allowed to write data to the key folder.");
                    await Response.SendResponse();
                    return;
                }
            }
 
            await Export.SetExportFolderAsync(ExportFolder);
            await Export.SetExportKeyFolderAsync(KeyFolder);
            await Export.SetBackupHostsAsync(BackupHosts);
            await Export.SetKeyHostsAsync(KeyHosts);
 
            Response.StatusCode = 200;
            Response.StatusMessage = "OK";
            await Response.SendResponse();
        }
 
        private static void Trim(string[] Array)
        {
            int i, c = Array.Length;
 
            for (i = 0; i < c; i++)
                Array[i] = Array[i].Trim();
        }
    }
}