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yura415/CopyStreamingAssets.cs

Last active April 12, 2018 12:52
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Copy assets from streaming assets to persistent data path. Also add unique suffix to links and scripts included in html files to disable webview caching.
Raw
CopyStreamingAssets.cs
using System;
using System.Collections;
using System.Globalization;
using System.IO;
using System.Text.RegularExpressions;
using UnityEngine;
using Random = UnityEngine.Random;
/// <summary>
/// Copy contents of StreamingAssets to Application.persistentDataPath
/// </summary>
public class CopyStreamingAssets : MonoBehaviour
{
private static readonly string[] FileList =
{
"index.html",
"other.html",
"js/script.js",
"js/es6-promise.auto.min.js",
"css/base.css",
"assets/button.png",
};
private static readonly string RegExp = @"((href|src)='[a-z\/.-]+(.?))'".Replace("'", "\"");
/// <summary>
/// Log filenames to console on copy
/// </summary>
private const bool DebugMode = true;
/// <summary>
/// Directory name under StreamingAssets in which your files are stored
/// </summary>
private const string BaseDir = "webview-resources";
public static CopyStreamingAssets Create()
{
return new GameObject
{
name = "[CopyStreamingAssets]",
hideFlags = HideFlags.HideAndDontSave,
}.AddComponent<CopyStreamingAssets>();
}
protected IEnumerator Start()
{
if (DebugMode)
{
Debug.Log("Copy streaming assets");
}
var basePath = Path.Combine(Application.streamingAssetsPath, BaseDir);
foreach (var file in FileList)
{
var filePath = Path.Combine(basePath, file);
var dstPath = filePath.Replace(Application.streamingAssetsPath, Application.persistentDataPath);
var dstDir = Path.GetDirectoryName(dstPath);
if (!Directory.Exists(dstDir))
{
Directory.CreateDirectory(dstDir);
}
if (filePath.Contains("://"))
{
var www = new WWW(filePath);
yield return www;
if (!string.IsNullOrEmpty(www.error))
{
Debug.LogWarningFormat("failed to read file {0}: {1}", file, www.error);
}
else
{
if (filePath.EndsWith(".html"))
{
File.WriteAllText(dstPath, AddUniqueSuffixToResources(www.text));
}
else
{
File.WriteAllBytes(dstPath, www.bytes);
}
if (DebugMode)
{
Debug.LogFormat("copy {0} to {1}", file, dstPath);
}
}
}
else
{
try
{
if (filePath.EndsWith(".html"))
{
var text = File.ReadAllText(filePath);
File.WriteAllText(dstPath, AddUniqueSuffixToResources(text));
}
else
{
File.Copy(filePath, dstPath, true);
}
if (DebugMode)
{
Debug.LogFormat("copy {0} to {1}", file, dstPath);
}
}
catch (Exception e)
{
Debug.LogWarningFormat("failed to read file {0}: {1}", file, e.Message);
}
}
}
}
private string AddUniqueSuffixToResources(string html)
{
#if UNITY_EDITOR
var replacement = "$1?" + Random.value.ToString(CultureInfo.InvariantCulture) + "\"";
return Regex.Replace(html, RegExp, replacement);
#else
return html;
#endif
}
}
Raw
index.html
<!doctype html>
<html>
<head>
<title> EXAMPLE </title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<link rel="stylesheet" type="text/css" href="css/base.css" />
</head>
<body>
<div id="main-container">
<p> hello world </p>
</div>
<script src="js/base.js"></script>
</body>
</html>
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