Unity 使用Unirx网络库进行文件下载

Unirx地址：https://github.com/neuecc/UniRx

下面是进行文件的下载的两个方式，单个下载和批量下载。包括加入请求头

using UnityEngine;using System.Collections;using UniRx;using System;using System.IO;using System.Collections.Generic;public class DownloadManager{    public static Download Download(string url, string path, Action<float, string> progress, Action<string, Exception> onError = null, Action<string> onComplete = null, Dictionary <string,string> header = null)    {        FileStream stream = null;        IDisposable disposable = ObservableWWW.GetAndGetBytes(url, header, new Progress<float>(progress, url)).Subscribe((byte[] bytes) => {            if (null == stream)            {                stream = File.OpenWrite(path);            }            if (null != stream)            {                stream.Write(bytes, 0, bytes.Length);            }        },         (Exception e) => {            if (null != stream)            {                stream.Flush();                stream.Close();            }            if (File.Exists(path))            {                File.Delete(path);            }            if (null != onError)            {                onError(url, e);            }        },         () => {            if (null != stream)             {                stream.Flush();                stream.Close();             }            if (null != onComplete)            {                onComplete(url);            }        });        Download download = new Download();        DownloadItem item = new DownloadItem(url, path, disposable);        download.AddDownloadItemToQueue(item);        return download;    }    public static Download DownloadAll(string[] urls, string[] paths, Action<float, string[]> progress,         Action<string[], string[]> onComplete = null, Dictionary<string, string> header = null)    {        Download downloads = new Download();        int length = urls.Length;        Dictionary<string, float> totalProgress = new Dictionary<string, float>();        List<string> success = new List<string>();        List<string> errors = new List<string>();        for (int i = 0; i < length; i++)        {            totalProgress[urls[i]] = 0;        }        int respondCount = 0;        System.Object lockObj = new System.Object();        for (int i = 0; i < length; i++)        {            Download download = Download(urls[i], paths[i], (float value, string url) => {                totalProgress[url] = value;                if (null != progress)                {                    float curTotalProgress = 0;                    for (int j = 0; j < length; j++)                    {                        curTotalProgress += totalProgress[urls[j]];                    }                    progress(curTotalProgress / length, success.ToArray());                }            },            (string url, Exception e) => {                lock(lockObj)                {                    respondCount++;                }                errors.Add(url);                if (respondCount >= length)                {                    onComplete(success.ToArray(), errors.ToArray());                }            },            (string url) => {                lock(lockObj)                {                    respondCount++;                }                success.Add(url);                if (respondCount >= length)                {                    onComplete(success.ToArray(), errors.ToArray());                }            }, header);            downloads.AddDownloadToQueue(download);        }        return downloads;    }}public class Progress<T> : IProgress<T>{    private Action<T, string> progress;    private string url;    public Progress(Action<T, string> progress, string url)    {        this.progress = progress;        this.url = url;    }    public void Report(T value)    {        if (null != this.progress)        {            this.progress(value, url);        }    }}public class Download{    private Queue<DownloadItem> downloadItemQueue = null;    public void AddDownloadItemToQueue(DownloadItem item)    {        if (null == item)        {            return;        }        if (null == downloadItemQueue)        {            this.downloadItemQueue = new Queue<DownloadItem>();        }        this.downloadItemQueue.Enqueue(item);    }    /**     * 合并两个下载，把一个下载里面的任务合并到另外一个下载     */    public void AddDownloadToQueue(Download download)    {        if (null == download)        {            return;        }        if (null == this.downloadItemQueue)        {            this.downloadItemQueue = new Queue<DownloadItem>();        }        for (int i = 0, count = download.downloadItemQueue.Count; i < count; i++)        {            DownloadItem item = download.downloadItemQueue.Dequeue();            this.downloadItemQueue.Enqueue(item);        }    }    public void Cancel()    {        if (this.downloadItemQueue == null)        {            return;        }        for (int i = 0, count = this.downloadItemQueue.Count; i < count; i++)        {            DownloadItem item = this.downloadItemQueue.Dequeue();            item.disposable.Dispose();            if (File.Exists(item.path))            {                File.Delete(item.path);            }        }    }}public class DownloadItem{    public string url;    public string path;    public IDisposable disposable;    public DownloadItem(string url, string path, IDisposable disposable)    {        this.url = url;        this.path = path;        this.disposable = disposable;    }}