WebClient 下载超时
/// <summary>
/// Geovin Du geovindu 塗聚文 涂聚文
/// </summary>
public class NewWebClient : WebClient
{
private int _timeout;
/// <summary>
/// 超时时间(毫秒)
/// </summary>
public int Timeout
{
get
{
return _timeout;
}
set
{
_timeout = value;
}
}
/// <summary>
///
/// </summary>
public NewWebClient()
{
this._timeout = 60000;
}
/// <summary>
///
/// </summary>
/// <param name="timeout"></param>
public NewWebClient(int timeout)
{
this._timeout = timeout;
}
/// <summary>
///
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
protected override WebRequest GetWebRequest(Uri address)
{
//WebClient里上传下载的方法很多，但最终应该都是调用了这个方法
HttpWebRequest request = (HttpWebRequest)base.GetWebRequest(address);
request.Timeout = Timeout;
request.ReadWriteTimeout = Timeout;
return request;
}
}
public class Calculagraph
{
/// <summary>
/// 时间到事件
/// </summary>
public event TimeoutCaller TimeOver;
/// <summary>
/// 开始时间
/// </summary>
private DateTime _startTime;
private TimeSpan _timeout = new TimeSpan(0, 0, 10);
private bool _hasStarted = false;
object _userdata;
/// <summary>
/// 计时器构造方法
/// </summary>
/// <param name="userdata">计时结束时回调的用户数据</param>
public Calculagraph(object userdata)
{
TimeOver += new TimeoutCaller(OnTimeOver);
_userdata = userdata;
}
/// <summary>
/// 超时退出
/// </summary>
/// <param name="userdata"></param>
public virtual void OnTimeOver(object userdata)
{
Stop();
}
/// <summary>
/// 过期时间(秒)
/// </summary>
public int Timeout
{
get
{
return _timeout.Seconds;
}
set
{
if (value <= 0)
return;
_timeout = new TimeSpan(0, 0, value);
}
}
/// <summary>
/// 是否已经开始计时
/// </summary>
public bool HasStarted
{
get
{
return _hasStarted;
}
}
/// <summary>
/// 开始计时
/// </summary>
public void Start()
{
Reset();
_hasStarted = true;
Thread th = new Thread(WaitCall);
th.IsBackground = true;
th.Start();
}
/// <summary>
/// 重置
/// </summary>
public void Reset()
{
_startTime = DateTime.Now;
}
/// <summary>
/// 停止计时
/// </summary>
public void Stop()
{
_hasStarted = false;
}
/// <summary>
/// 检查是否过期
/// </summary>
/// <returns></returns>
private bool checkTimeout()
{
return (DateTime.Now - _startTime).Seconds >= Timeout;
}
private void WaitCall()
{
try
{
//循环检测是否过期
while (_hasStarted && !checkTimeout())
{
Thread.Sleep(1000);
}
if (TimeOver != null)
TimeOver(_userdata);
}
catch (Exception)
{
Stop();
}
}
}
/// <summary>
/// 过期时回调委托
/// </summary>
/// <param name="userdata"></param>
public delegate void TimeoutCaller(object userdata);
/// <summary>
///
/// </summary>
public class DuWebClient : WebClient
{
private Calculagraph _timer;
private int _timeOut = 10;
/// <summary>
/// 过期时间
/// </summary>
public int Timeout
{
get
{
return _timeOut;
}
set
{
if (value <= 0)
_timeOut = 10;
_timeOut = value;
}
}
/// <summary>
///
/// </summary>
public DuWebClient()
{
this._timeOut = 60000;
}
/// <summary>
///
/// </summary>
/// <param name="timeout"></param>
public DuWebClient(int timeout)
{
this._timeOut = timeout;
}
/// <summary>
/// 重写GetWebRequest,添加WebRequest对象超时时间
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
protected override WebRequest GetWebRequest(Uri address)
{
HttpWebRequest request = (HttpWebRequest)base.GetWebRequest(address);
request.Timeout = 1000 * Timeout;
request.ReadWriteTimeout = 1000 * Timeout;
return request;
}
/// <summary>
/// 带过期计时的下载
/// </summary>
public void DownloadFileAsyncWithTimeout(Uri address, string fileName, object userToken)
{
if (_timer == null)
{
_timer = new Calculagraph(this);
_timer.Timeout = Timeout;
_timer.TimeOver += new TimeoutCaller(_timer_TimeOver);
this.DownloadProgressChanged += new DownloadProgressChangedEventHandler(CNNWebClient_DownloadProgressChanged);
}
DownloadFileAsync(address, fileName, userToken);
_timer.Start();
}
/// <summary>
/// WebClient下载过程事件，接收到数据时引发
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void CNNWebClient_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
{
_timer.Reset();//重置计时器
}
/// <summary>
/// 计时器过期
/// </summary>
/// <param name="userdata"></param>
void _timer_TimeOver(object userdata)
{
this.CancelAsync();//取消下载
}
}
string url = "http://www.dusystem.com/DuBooket/JwBookTest.ashx?DuQuery=" + projectid; //&jsonpCallback=?
context.Response.AddHeader("Access-Control-Allow-Origin", "http://intranet.lukfook.com.hk/");
context.Response.ContentType = "application/json ;charset=utf-8";
//1
//WebClient wc = new WebClient();
//wc.Headers["User-Agent"] = "blah";
//wc.Encoding = System.Text.Encoding.UTF8;//定义对象语言 Geovin Du 涂聚文
//byte[] btWeb = wc.DownloadData(url);
//2
//NewWebClient wc = new NewWebClient(30 * 60 * 1000);
//byte[] btWeb = wc.DownloadData(url);
//wc.Headers["User-Agent"] = "blah";
//wc.Encoding = System.Text.Encoding.UTF8;
//json = Encoding.GetEncoding("GB2312").GetString(btWeb);
//3
DuWebClient wc = new DuWebClient(30 * 60 * 1000);
byte[] btWeb = wc.DownloadData(url);
wc.Headers["User-Agent"] = "blah";
wc.Encoding = System.Text.Encoding.UTF8;
json = System.Text.Encoding.UTF8.GetString(btWeb);
context.Response.ContentType = "text/plain";
context.Response.Write(json);
safari 下載亂碼問題
/*
* safari相对比较变态, filename部分只能使用utf-8的原始字节，而http header 必须使用单字节编码的字符串, 因此需要将原始内容重新构造为iso-8859-1单字节编码的字符串，即：new String(filename.getBytes("UTF-8"),"ISO8859-1")
* 编码方式 | 测试通过的浏览器
new String(filename.getBytes("UTF-8"),"ISO8859-1")
前端-后台 base_name.getBytes("ISO-8859-1"),"UTF-8")
后台-前端 base_name.getBytes("GB2312"),"ISO-8859-1")
RFC2231 filename* | ie9 ,chrome17 , opera11,firefox11
iso-8859-1 (utf-8): | chrome,opera,firefox,safari
url-encode(utf-8) | ie6+ (文件名必须带扩展名), chrome\opera(%2B 加号不识别)
因此兼容规则设置为 ie: urlEncode , opera\firefox : filename*, safari\chrome: iso-8859-1 比较合适
* 各浏览器支持的对应编码格式为：
1. IE浏览器，采用URLEncoder编码
2. Opera浏览器，采用filename*方式
3. Safari浏览器，采用ISO编码的中文输出
4. Chrome浏览器，采用Base64编码或ISO编码的中文输出
5. FireFox浏览器，采用Base64或filename*或ISO编码的中文输出
new_filename = URLEncoder.encode(filename, "UTF8");
// 如果没有UA，则默认使用IE的方式进行编码，因为毕竟IE还是占多数的
rtn = "filename=\"" + new_filename + "\"";
if (userAgent != null)
{
userAgent = userAgent.toLowerCase();
// IE浏览器，只能采用URLEncoder编码
if (userAgent.indexOf("msie") != -1)
{
rtn = "filename=\"" + new_filename + "\"";
}
// Opera浏览器只能采用filename*
else if (userAgent.indexOf("opera") != -1)
{
rtn = "filename*=UTF-8''" + new_filename;
}
// Safari浏览器，只能采用ISO编码的中文输出
else if (userAgent.indexOf("safari") != -1 )
{
rtn = "filename=\"" + new String(filename.getBytes("UTF-8"),"ISO8859-1") + "\""; //java
}
// Chrome浏览器，只能采用MimeUtility编码或ISO编码的中文输出
else if (userAgent.indexOf("applewebkit") != -1 )
{
new_filename = MimeUtility.encodeText(filename, "UTF8", "B");
rtn = "filename=\"" + new_filename + "\"";
}
// FireFox浏览器，可以使用MimeUtility或filename*或ISO编码的中文输出
else if (userAgent.indexOf("mozilla") != -1)
{
rtn = "filename*=UTF-8''" + new_filename;
}
}
*/
https://www.codeproject.com/articles/1088703/how-to-detect-browsers-in-asp-net-with-browser-fil
Chrome 47
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36
Firefox 43
Mozilla/5.0 (Windows NT 10.0; WOW64; rv:40.0) Gecko/20100101 Firefox/43.0
Safari 8
Mozilla/5.0 (iPhone; CPU iPhone OS 8_4_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12H321 Safari/600.1.4
IE 11
Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko
Edge
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240
Opera
Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14
Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36 OPR/34.0.2036.25
Silk 2
Mozilla/5.0 (Linux; U; en-us; KFTT Build/IML74K) AppleWebKit/535.19 (KHTML, like Gecko) Silk/2.1 Safari/535.19 Silk-Accelerated=true
Maxthon 4
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Maxthon/4.4.1.5000 Chrome/30.0.1599.101 Safari/537.36
SeaMonkey 8
Mozilla/5.0 (Windows; U; Windows NT 10.0; WOW64; rv:1.8.0.7) Gecko/20110321 MultiZilla/4.33.2.6a SeaMonkey/8.6.55
public bool IsMacOS(string userAgent)
{
var osInfo = userAgent.Split(new Char[] { '(', ')' })[1];
return osInfo.Contains("Mac_PowerPC") || osInfo.Contains("Macintosh");
}
HttpBrowserCapabilities moo = HttpContext.Current.Request.Browser;
StringBuilder sb = new StringBuilder();
sb.Append("<p>Browser Capabilities:</p>");
sb.Append("Type = " + moo.Type + "<br>");
sb.Append("Name = " + moo.Browser + "<br>");
sb.Append("Version = " + moo.Version + "<br>");
sb.Append("Major Version = " + moo.MajorVersion + "<br>");
sb.Append("Minor Version = " + moo.MinorVersion + "<br>");
sb.Append("Platform = " + moo.Platform + "<br>");
sb.Append("Is Beta = " + moo.Beta + "<br>");
sb.Append("Is Crawler = " + moo.Crawler + "<br>");
sb.Append("Is AOL = " + moo.AOL + "<br>");
sb.Append("Is Win16 = " + moo.Win16 + "<br>");
sb.Append("Is Win32 = " + moo.Win32 + "<br>");
sb.Append("Supports Frames = " + moo.Frames + "<br>");
sb.Append("Supports Tables = " + moo.Tables + "<br>");
sb.Append("Supports Cookies = " + moo.Cookies + "<br>");
sb.Append("Supports VB Script = " + moo.VBScript + "<br>");
sb.Append("Supports ActiveX Controls = " + moo.ActiveXControls + "<br>");
sb.Append("CDF = " + moo.CDF + "<br>");
/// <summary>
///
/// </summary>
/// <param name="message"></param>
/// <returns></returns>
private string UtfToIso(string message)
{
Encoding iso = Encoding.GetEncoding("ISO-8859-1");
Encoding utf8 = Encoding.UTF8;
byte[] utfBytes = utf8.GetBytes(message);
byte[] isoBytes = Encoding.Convert(utf8, iso, utfBytes);
string msg = iso.GetString(isoBytes);
return msg;
}
/// <summary>
///
/// </summary>
/// <param name="message"></param>
/// <returns></returns>
private string IsoDecode(string message)
{
string result = "";
Encoding iso = Encoding.GetEncoding("iso-8859-1");
Encoding utf8 = Encoding.UTF8;
byte[] isoBytes = iso.GetBytes(message);
byte[] utf8Bytes = Encoding.Convert(iso, utf8, isoBytes);
result = utf8.GetString(utf8Bytes);
return result;
}
哲学管理(学)人生, 文学艺术生活, 自动(计算机学)物理(学)工作, 生物(学)化学逆境, 历史(学)测绘(学)时间, 经济(学)数学金钱(理财), 心理(学)医学情绪, 诗词美容情感, 美学建筑(学)家园, 解构建构(分析)整合学习, 智商情商(IQ、EQ)运筹(学)生存.---Geovin Du(涂聚文）
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