☰

Refresh Unavailable

Auto refresh when pages are unavailable

  1. // ==UserScript==
  2. // @name        Refresh Unavailable
  3. // @namespace   iFantz7E.RefreshUnavailable
  4. // @description Auto refresh when pages are unavailable
  5. // @include     *
  6. // @version     1.05
  7. // @grant       none
  8. // @run-at      document-start
  9. // @copyright   2016, 7-elephant
  10. // ==/UserScript==
  11.  
  12. (function ()
  13. {	
  14. 	"use strict";
  15. 	// jshint multistr:true
  16. 	
  17. function attachOnLoad(callback)
  18. {
  19. 	window.addEventListener("load", function (e) 
  20. 	{
  21. 		callback();
  22. 	});
  23. }
  24.  
  25. function attachOnReady(callback) 
  26. {
  27. 	document.addEventListener("DOMContentLoaded", function (e) 
  28. 	{
  29. 		callback();
  30. 	});
  31. }
  32.  
  33. function reload()
  34. {
  35. 	window.location.reload();
  36. }
  37.  
  38. function ready()
  39. {
  40. 	var isAvailable = true;
  41. 	var reloadTime = 3000;
  42. 	
  43. 	if (document.body)
  44. 	{
  45. 		var child = document.body.firstChild;
  46. 		if (child && child.nodeType === 3 && child.textContent === "Service unavailable")
  47. 		{
  48. 			isAvailable = false;
  49. 		}
  50. 	}
  51. 	
  52. 	if (isAvailable)
  53. 	{
  54. 		if (document.title === "503 Service Temporarily Unavailable")
  55. 		{
  56. 			isAvailable = false;
  57. 			reloadTime = 30000;
  58. 		}
  59. 	}
  60. 	
  61. 	if (isAvailable)
  62. 	{
  63. 		if (document.title === "Network Error")
  64. 		{
  65. 			var eleBig = document.querySelector("body > blockquote:nth-child(2) > table:nth-child(1) "
  66. 				+ " > tbody:nth-child(1) > tr:nth-child(1) > td:nth-child(1) "
  67. 				+ " > font:nth-child(1) > big:nth-child(1)");
  68. 				
  69. 			if (eleBig && eleBig.textContent.trim() === "Network Error (tcp_error)")
  70. 			{
  71. 				isAvailable = false;
  72. 			}
  73. 		}
  74. 	}
  75. 	
  76. 	if (isAvailable)
  77. 	{
  78. 		var eleErr = document.querySelector("body > center:nth-child(1) > h1:nth-child(1)");
  79. 		if (eleErr && eleErr.textContent.trim() === "502 Bad Gateway")
  80. 		{
  81. 			isAvailable = false;
  82. 		}
  83. 	}
  84. 	
  85. 	if (isAvailable)
  86. 	{
  87. 		// Cloudflare
  88. 		var eleErr = document.querySelector(".cf-error-header-desc > h4");
  89. 		if (eleErr && eleErr.textContent.trim() === "Website is offline")
  90. 		{
  91. 			isAvailable = false;
  92. 			reloadTime = 10000;
  93. 		}
  94. 		
  95. 		if (isAvailable)
  96. 		{
  97. 			eleErr = document.querySelector(".cf-error-type");
  98. 			if (eleErr && eleErr.textContent.trim() === "Error")
  99. 			{
  100. 				isAvailable = false;
  101. 				reloadTime = 10000;
  102. 			}
  103. 		}
  104. 	}
  105. 	
  106. 	if (!isAvailable)
  107. 	{
  108. 		console.log("Autorefresh: Service unavailable in " + (reloadTime / 1000) + "s");
  109. 		setTimeout(reload, reloadTime);
  110. 	}
  111. }
  112.  
  113. attachOnReady(function()
  114. {
  115. 	ready();
  116. });
  117.  
  118. })();
  119.  
  120. // End