yura415/CopyStreamingAssets.cs

## 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
    }
}

## 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>
	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
	}
	}
	<!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>