Mercurial > servermonitor

annotate ServerMonitor/Objects/SshCheck.cs @ 1:9e92780ebc0f

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Additional validation for SSH check
author Brad Greco <brad@bgreco.net>
date Tue, 01 Jan 2019 21:14:47 -0500
parents 3e1a2131f897
children
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0
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1 using Renci.SshNet;
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2 using System;
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3 using System.Collections.Generic;
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4 using System.ComponentModel;
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5 using System.Linq;
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6 using System.Text;
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7 using System.Text.RegularExpressions;
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8 using System.Threading;
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9 using System.Threading.Tasks;
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10
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11 namespace ServerMonitorApp
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12 {
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13 [DisplayName("SSH check"), Description("Check the result of a command run over SSH"), DisplayWeight(10)]
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14 public class SshCheck : Check
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15 {
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16 public string Command { get; set; }
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17
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18 public bool CheckExitCode { get; set; }
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19
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20 public int ExitCode { get; set; }
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21
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22 public bool CheckCommandOutput { get; set; }
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23
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24 public MatchType CommandOutputMatchType { get; set; }
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25
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26 public string CommandOutputPattern { get; set; }
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27
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28 public bool CommandOutputUseRegex { get; set; }
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29
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30 protected override Task<CheckResult> ExecuteCheckAsync(CancellationToken token)
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31 {
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32 return Task.Run(() =>
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33 {
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34 try
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35 {
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36 if (!Server.SshClient.IsConnected)
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37 Server.SshClient.Connect();
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38 token.ThrowIfCancellationRequested();
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39 using (SshCommand command = Server.SshClient.CreateCommand(Command))
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40 {
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41 token.Register(command.CancelAsync);
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42 IAsyncResult ar = command.BeginExecute();
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43 token.ThrowIfCancellationRequested();
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44 string result = command.EndExecute(ar).Trim() + command.Error.Trim();
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45
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46 CheckResult exitCodeResult = null, commandOutputResult = null;
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47 if (CheckExitCode)
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48 exitCodeResult = GetIntResult(ExitCode, command.ExitStatus, "Exit code");
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49 if (CheckCommandOutput)
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50 commandOutputResult = GetStringResult(CommandOutputMatchType, CommandOutputPattern, CommandOutputUseRegex, result, "Command output");
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51 return MergeResults(exitCodeResult, commandOutputResult);
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52 }
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53 }
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54 catch (Exception e)
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55 {
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56 return Fail(e);
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57 }
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58 }, token);
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59 //TaskCompletionSource<CheckResult> tcs = new TaskCompletionSource<CheckResult>();
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60
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61 ////TODO timeout
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62 //if (!Server.SshClient.IsConnected)
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63 // Server.SshClient.Connect();
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64 //using (SshCommand command = Server.SshClient.CreateCommand(Command))
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65 //{
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66 // token.Register(command.CancelAsync);
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67 // command.BeginExecute(asyncResult =>
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68 // {
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69 // string result = command.EndExecute(asyncResult);
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70 // tcs.SetResult(new CheckResult(this, CheckStatus.Success, result));
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71 // });
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72 //}
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73
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74 //return tcs.Task;
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75 }
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76
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77 public override string Validate(bool saving = true)
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78 {
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79 string message = base.Validate();
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80 if (Server.Port <= 0)
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81 message += "Server SSH port is required." + Environment.NewLine;
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82 if (Server.Username.IsNullOrEmpty())
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83 message += "Server SSH username is required." + Environment.NewLine;
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84 if (Server.LoginType == LoginType.Password && Server.Password.IsNullOrEmpty())
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85 message += "Server SSH password is required." + Environment.NewLine;
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86 if (Server.LoginType == LoginType.PrivateKey && Server.KeyFile.IsNullOrEmpty())
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87 message += "Server SSH key is required." + Environment.NewLine;
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88 if (Command.IsNullOrEmpty())
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89 message += "Command is required." + Environment.NewLine;
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90 if (!CheckExitCode && !CheckCommandOutput)
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91 message += "At least one check must be enabled." + Environment.NewLine;
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92 if (CheckCommandOutput && CommandOutputUseRegex)
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93 {
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94 try
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95 {
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96 Regex re = new Regex(CommandOutputPattern);
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97 }
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98 catch (ArgumentException)
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99 {
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100 message += "Invalid regular expression for command output." + Environment.NewLine;
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101 }
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102 }
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103 return message;
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104 }
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105 }
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106 }