Mercurial > servermonitor

annotate ServerMonitor/Objects/Checks/SshCheck.cs @ 5:b6fe203af9d5

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Private key passwords and validation
author Brad Greco <brad@bgreco.net>
date Thu, 28 Feb 2019 21:19:32 -0500
parents 3142e52cbe69
children 052aa62cb42a
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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 virtual 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 try
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33 {
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34 if (!Server.SshClient.IsConnected)
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35 Server.SshClient.Connect();
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36 }
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37 catch (Exception e)
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38 {
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39 return Task.FromResult(Fail(e));
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40 }
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41 return Task.Run(() =>
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42 {
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43 try
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44 {
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45 token.ThrowIfCancellationRequested();
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46 using (SshCommand command = Server.SshClient.CreateCommand(Command))
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47 {
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48 token.Register(command.CancelAsync);
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49 IAsyncResult ar = command.BeginExecute();
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50 token.ThrowIfCancellationRequested();
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51 string output = (command.EndExecute(ar).Trim() + command.Error.Trim()).ConvertNewlines();
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52 return MergeResults(ProcessCommandResult(output, command.ExitStatus).ToArray());
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53 }
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54 }
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55 catch (Exception e)
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56 {
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57 return Fail(e);
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58 }
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59 }, token);
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60 //TaskCompletionSource<CheckResult> tcs = new TaskCompletionSource<CheckResult>();
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61
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62 ////TODO timeout
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63 //if (!Server.SshClient.IsConnected)
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64 // Server.SshClient.Connect();
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65 //using (SshCommand command = Server.SshClient.CreateCommand(Command))
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66 //{
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67 // token.Register(command.CancelAsync);
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68 // command.BeginExecute(asyncResult =>
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69 // {
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70 // string result = command.EndExecute(asyncResult);
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71 // tcs.SetResult(new CheckResult(this, CheckStatus.Success, result));
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72 // });
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73 //}
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74
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75 //return tcs.Task;
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76 }
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77
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78 protected virtual List<CheckResult> ProcessCommandResult(string output, int exitCode)
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79 {
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80 List<CheckResult> results = new List<CheckResult>();
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81 if (CheckExitCode)
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82 {
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83 CheckResult result = GetIntResult(ExitCode, exitCode, "Exit code");
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84 if (result.Failed)
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85 result.Message += ". Command output: " + output;
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86 results.Add(result);
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87 }
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88 if (CheckCommandOutput)
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89 results.Add(GetStringResult(CommandOutputMatchType, CommandOutputPattern, CommandOutputUseRegex, output, "Command output"));
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90 return results;
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91 }
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92
0
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93 public override string Validate(bool saving = true)
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94 {
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95 string message = base.Validate();
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96 if (Server.Port <= 0)
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97 message += "Server SSH port is required." + Environment.NewLine;
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98 if (Server.Username.IsNullOrEmpty())
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99 message += "Server SSH username is required." + Environment.NewLine;
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100 if (Server.LoginType == LoginType.Password && Server.Password.IsNullOrEmpty())
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101 message += "Server SSH password is required." + Environment.NewLine;
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102 if (Server.LoginType == LoginType.PrivateKey && Server.KeyFile.IsNullOrEmpty())
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103 message += "Server SSH key is required." + Environment.NewLine;
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104 if (Command.IsNullOrEmpty())
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105 message += "Command is required." + Environment.NewLine;
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106 if (!CheckExitCode && !CheckCommandOutput)
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107 message += "At least one check must be enabled." + Environment.NewLine;
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108 if (CheckCommandOutput && CommandOutputUseRegex)
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109 {
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110 try
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111 {
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112 Regex re = new Regex(CommandOutputPattern);
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113 }
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114 catch (ArgumentException)
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115 {
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116 message += "Invalid regular expression for command output." + Environment.NewLine;
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117 }
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118 }
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119 return message;
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120 }
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121 }
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122 }