あなたのリンクの Content-Type 応答は私にとっては問題ないようです:
Request URL:http://dl.opensubtitles.org/en/download/sub/4860863
Request Method:GET
Status Code:200 OK
Request Headersview:
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*//*;q=0.8
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Connection:keep-alive
Cookie:PHPSESSID=gk86hdrce96pu06kuajtue45a6; ts=1372177758
Host:dl.opensubtitles.org
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.116 Safari/537.36
Response Headersview:
Accept-Ranges:bytes
Age:0
Cache-Control:must-revalidate, post-check=0, pre-check=0
Connection:keep-alive
Content-Disposition:attachment; filename="the.dark.knight.(2008).dut.1cd.(4860863).zip"
Content-Length:48473
Content-Transfer-Encoding:Binary
Content-Type:application/zip
Date:Tue, 25 Jun 2013 16:29:45 GMT
Expires:Mon, 1 Apr 2006 01:23:45 GMT
Pragma:public
Set-Cookie:ts=1372177785; expires=Thu, 25-Jul-2013 16:29:45 GMT; path=/
X-Cache:MISS
X-Cache-Backend:web1
私はあなたのコードをチェックし、リンクを使用してテストし、手動ダウンロードで48473バイトのファイルを生成し、コードを使用して0xDC2の後にゼロで48564バイトを生成し、それをHexエディターと比較すると、多くの異なる部分があります。リクエストを送信する前に、リクエスト ヘッダーを追加する必要がある場合があります。
わかりました、今私はそれを解決することができます: クッキーを入れて、より小さなチャンクで読んでください
private void button1_Click(object sender, EventArgs e) {
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri("http://dl.opensubtitles.org/en/download/sub/4860863"));
//request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.116 Safari/537.36";
//request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*//*;q=0.8";
//request.Headers["Accept-Encoding"] = "gzip,deflate,sdch";
request.Headers["Cookie"] = "PHPSESSID=gk86hdrce96pu06kuajtue45a6; ts=1372177758";
using (WebResponse response = request.GetResponse())
using (Stream stream = response.GetResponseStream()) {
string contentType = response.ContentType;
// TODO: examine the content type and decide how to name your file
string filename = "test.zip";
// Download the file
using (Stream file = File.OpenWrite(filename)) {
byte[] buffer = ReadFully(stream, 256);
stream.Read(buffer, 0, buffer.Length);
file.Write(buffer, 0, buffer.Length);
}
}
}
/// <summary>
/// Reads data from a stream until the end is reached. The
/// data is returned as a byte array. An IOException is
/// thrown if any of the underlying IO calls fail.
/// </summary>
/// <param name="stream">The stream to read data from</param>
/// <param name="initialLength">The initial buffer length</param>
public static byte[] ReadFully(Stream stream, int initialLength) {
// If we've been passed an unhelpful initial length, just
// use 32K.
if (initialLength < 1) {
initialLength = 32768;
}
byte[] buffer = new byte[initialLength];
int read = 0;
int chunk;
while ((chunk = stream.Read(buffer, read, buffer.Length - read)) > 0) {
read += chunk;
// If we've reached the end of our buffer, check to see if there's
// any more information
if (read == buffer.Length) {
int nextByte = stream.ReadByte();
// End of stream? If so, we're done
if (nextByte == -1) {
return buffer;
}
// Nope. Resize the buffer, put in the byte we've just
// read, and continue
byte[] newBuffer = new byte[buffer.Length * 2];
Array.Copy(buffer, newBuffer, buffer.Length);
newBuffer[read] = (byte)nextByte;
buffer = newBuffer;
read++;
}
}
// Buffer is now too big. Shrink it.
byte[] ret = new byte[read];
Array.Copy(buffer, ret, read);
return ret;
}
編集: Cookie を設定する必要はまったくありません。別のファイルを作成しますが、有効なファイルを作成します。サーバーがファイルに再アクセスすると、ファイルに追加情報が追加されると思います。