mp4文件播放和下载控制
0
悬赏园豆：50
[已解决问题]
解决于 2016-06-06 15:33
项目需要对mp4文件做权限控制。不能让用户在浏览器输入mp4文件目录就直接下载或者播放。
我的做法是给mp4文件做了handler，在handler里做权限控制。
现在的问题是，文件下载没有问题，但是不能播放。大家看看问题出在哪里？？？
handler代码如下：
1 public void ProcessRequest(HttpContext context) 2 { 3 Request = context.Request; 4 Response = context.Response; 5 //write your handler implementation here. 6 7 Stream iStream = null; 8 // Buffer to read 10K bytes in chunk: 9 byte[] buffer = new Byte[10000]; 10 // Length of the file: 11 int length; 12 // Total bytes to read: 13 long dataToRead; 14 // Identify the file to download including its path. 15 string filepath = context.Request.PhysicalPath; 16 // Identify the file name. 17 string filename = System.IO.Path.GetFileName(filepath); 18 try 19 { 20 21 // Open the file. 22 iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open, 23 System.IO.FileAccess.Read, System.IO.FileShare.Read); 24 // Total bytes to read: 25 dataToRead = iStream.Length; 26 Response.ContentType = "video/mp4"; 27 //Response.AddHeader("Content-Disposition", "attachment; filename=" + filename); 28 // Read the bytes. 29 while (dataToRead > 0) 30 { 31 // Verify that the client is connected. 32 if (Response.IsClientConnected) 33 { 34 // Read the data in buffer. 35 length = iStream.Read(buffer, 0, 10000); 36 // Write the data to the current output stream. 37 Response.OutputStream.Write(buffer, 0, length); 38 // Flush the data to the HTML output. 39 Response.Flush(); 40 buffer = new Byte[10000]; 41 dataToRead = dataToRead - length; 42 } 43 else 44 { 45 //prevent infinite loop if user disconnects 46 dataToRead = -1; 47 } 48 49 } 50 51 } 52 catch (Exception ex) 53 { 54 // Trap the error, if any. 55 Response.Write("Error : " + ex.Message); 56 } 57 finally 58 { 59 60 if (iStream != null) 61 { 62 //Close the file. 63 iStream.Close(); 64 } 65 } 66 }
最佳答案
0
http://gnehcic.azurewebsites.net/%E5%AF%A6%E4%BD%9Cmp4%E5%88%86%E6%AE%B5%E4%B8%8B%E8%BC%89/
建议参考下这个。视频播放，Http请求的Header中含有Range属性，需要处理一下。下边是一个实现，可以下载，可以播放。
var Request = context.Request;
var Response = context.Response;
Response.CacheControl = "public";
var fileName = Request.QueryString["filename"];
if (!string.IsNullOrWhiteSpace(fileName))
{
FileStream stm = null;
try
{
FileInfo fi = new FileInfo(Path.Combine(Global.ServerPath, fileName));
stm = new FileStream(fi.FullName, FileMode.Open, FileAccess.Read);
///处理HttpHeaders，HttpHeaderVariable是自定义的一个类，见最后。
var vary = HttpHeaderVariable.Init(Request);
vary.Range.Total = fi.Length;
if (vary.Range.End == 0 || vary.Range.End > vary.Range.Total - 1)
{
vary.Range.End = vary.Range.Total - 1;
}
if (vary.IsContainsModify)
{
if (fi.LastWriteTimeUtc <= vary.SinceModify)
{
Response.StatusCode = 304;
Response.Headers.Add("Etag", GetEtag(fi));
Response.End();
}
}
if (vary.IsContanisIfRange)
{
if (GetEtag(fi) == vary.IfRangeString)
{
Response.StatusCode = 206;
Response.Headers.Add("Etag", GetEtag(fi));
}//get all
else
{
vary.Range.Start = 0;
vary.Range.End = vary.Range.Total - 1;
}
}
if (vary.IsContainsRange) Response.StatusCode = 206;
else Response.StatusCode = 200;
Response.AddHeader("Accept-Ranges", "bytes");
Response.AddHeader("Connection", "keep-alive");
Response.AddHeader("Content-Length", vary.Range.Length.ToString());
Response.AddHeader("Content-Range", string.Format("bytes {0}-{1}/{2}", vary.Range.Start, vary.Range.End, vary.Range.Total));
Response.ContentType = "video/mp4";
Response.Cache.SetMaxAge(TimeSpan.FromHours(1));
Response.Cache.SetETag(GetEtag(fi));
Response.Cache.SetExpires(DateTime.Now.AddDays(3));
Response.Cache.SetLastModified(fi.LastWriteTime);
stm.Position = vary.Range.Start;
long totalLength = vary.Range.Length;
var buffer = new byte[1024];
int n = 1;
while (totalLength > 0 && n > 0)
{
n = stm.Read(buffer, 0, (int)Math.Min(totalLength, buffer.Length));
Response.OutputStream.Write(buffer, 0, n);
totalLength -= n;
}
}
finally
{
if (stm != null)
{
stm.Dispose();
}
Response.End();
}
}
}
private string GetEtag(FileInfo fi)
{
//return Meng.Web.Common.Utility.GetSHA256String(fi.FullName + fi.LastWriteTime);
return fi.FullName;
}
public class HttpHeaderVariable
{
public bool IsContainsRange { get; set; }
public ContentRange Range { get; set; }
public bool IsContainsModify { get; set; }
public DateTime SinceModify { get; set; }
public bool IsContanisIfRange { get; set; }
public string IfRangeString { get; set; }
public bool IsContainsUnmodified { get; set; }
public DateTime SinceUnmodify { get; set; }
public static HttpHeaderVariable Init(HttpRequest request)
{
HttpHeaderVariable r = new HttpHeaderVariable();
r.Range = new ContentRange();
var ifRanges = request.Headers.GetValues("If-Range");
if (ifRanges != null)
{
r.IsContanisIfRange = true;
r.IfRangeString = ifRanges[0];
}
var ifModifies = request.Headers.GetValues("If-Modified-Since");
if (ifModifies != null)
{
r.IsContainsModify = true;
r.SinceModify = Convert.ToDateTime(ifModifies[0]);
}
var ifUnmodifies = request.Headers.GetValues("If-Unmodified-Since");
if (ifUnmodifies != null)
{
r.IsContainsUnmodified = true;
r.SinceUnmodify = Convert.ToDateTime(ifUnmodifies[0]);
}
var ranges = request.Headers.GetValues("Range");
if (ranges != null)
{
r.IsContainsRange = true;
var range = ranges[0];
int indexD = range.IndexOf('=');
int indexJ = range.IndexOf('-');
r.Range.Start = Convert.ToInt32(range.Substring(indexD + 1, indexJ - indexD - 1));
if (indexJ == range.Length - 1)
r.Range.End = 0;
else
r.Range.End = Convert.ToInt32(range.Substring(indexJ + 1, range.Length - indexJ - 1));
}
return r;
}
public class ContentRange
{
public long Start { get; set; }
public long End { get; set; }
public long Total { get; set; }
public long Length { get { return End - Start + 1; } }
public ContentRange(long start, long end, long total)
{
Start = start;
End = end;
Total = total;
}
public ContentRange()
{
}
}
收获园豆：50
其他回答(3)
0
建议楼主检查一下，文件是否一致。
0
是不是没有设置文件类型stream什么的
0
可能的原因是 网页播放器请求视频时 无法正常获取视频
未附带cookies或者其他
