/// <summary>
/// Writes an object to S3 using streaming.
/// </summary>
/// <param name="bucket">The name of the bucket to which the object will be added.</param>
/// <param name="key">The name of the key to use</param>
/// <param name="obj">An S3Object containing the data to write.</param>
/// <param name="headers">A map of string to string representing the HTTP headers to pass (can be null)</param>
public Response putStream(string bucket, string key, S3StreamObject obj, SortedList headers)
{
Boolean isEmptyKey = (key == null) || (key.Length == 0)
|| (key.Trim().Length == 0);
string pathSep = isEmptyKey ? "" : "/";
if (key == null)
key = "";
/*WebRequest request = makeStreamRequest("PUT", bucket + pathSep
+ HttpUtility.UrlEncode(key), headers, obj);
*/
WebRequest request = makeStreamRequest("PUT", bucket + pathSep
+ key, headers, obj);
// cast WebRequest to a HttpWebRequest to allow for direct streaming of data
HttpWebRequest hwr = (HttpWebRequest) request;
hwr.AllowWriteStreamBuffering = false;
hwr.SendChunked = false;
hwr.ContentLength = obj.Stream.Length;
ASCIIEncoding encoding = new ASCIIEncoding();
byte[] buf = new byte[1024];
BufferedStream bufferedInput = new BufferedStream(obj.Stream);
int contentLength = 0;
int bytesRead = 0;
while ((bytesRead = bufferedInput.Read(buf, 0, 1024)) > 0)
{
contentLength += bytesRead;
hwr.GetRequestStream().Write( buf, 0, bytesRead );
}
hwr.GetRequestStream().Close();
return new Response( request );
}
/// <summary>
/// Make a new WebRequest
/// </summary>
/// <param name="method">The HTTP method to use (GET, PUT, DELETE)</param>
/// <param name="resource">The resource name (bucket + "/" + key)</param>
/// <param name="headers">A map of string to string representing the HTTP headers to pass (can be null)</param>
/// <param name="obj">S3StreamObject that is to be written (can be null).</param>
private WebRequest makeStreamRequest( string method, string resource, SortedList headers, S3StreamObject obj )
{
string url = makeURL( resource );
WebRequest req = WebRequest.Create( url );
req.Timeout = 3600000; // 1 hr
req.Method = method;
addHeaders( req, headers );
if ( obj != null ) addMetadataHeaders( req, obj.Metadata );
addAuthHeader( req, resource );
return req;
}
public static Response PutStream(string bucket, string key, Stream stream, bool setPublic )
{
S3StreamObject s3Object = new S3StreamObject(stream, null);
int lastSlash = Math.Max(key.LastIndexOf("/"), key.LastIndexOf("\\"));
string fileName = key.Substring(lastSlash + 1);
string extension = fileName.Substring(fileName.LastIndexOf(".") + 1).ToLower();
System.Collections.SortedList headers = new System.Collections.SortedList();
bool setDisposition = false;
if (extension == "exe" || extension == "bin")
{
headers["Content-Type"] = "application/octet-stream";
setDisposition = true;
}
else if (extension == "zip")
{
headers["Content-Type"] = "application/zip";
setDisposition = true;
}
else if (extension == "tar")
{
headers["Content-Type"] = "application/x-tar";
setDisposition = true;
}
else if (extension == "gz")
{
headers["Content-Type"] = "application/x-gzip";
setDisposition = true;
}
else if (extension == "png")
{
headers["Content-Type"] = "image/png";
}
else if (extension == "gif")
{
headers["Content-Type"] = "image/gif";
}
else if (extension == "jpg" || extension == "jpeg" )
{
headers["Content-Type"] = "image/jpeg";
}
if (setDisposition)
{
headers["Content-Disposition"] = "attachment; filename=\"" + fileName + "\"";
}
try
{
// Get a connection to s3
AWSAuthConnection conn = AmazonS3.GetConnection();
// Stream the file to S3
Response response = conn.putStream(bucket, key, s3Object, headers);
if (setPublic)
{
string acl = "<AccessControlPolicy xmlns=\"http://s3.amazonaws.com/doc/2006-03-01/\"><Owner><ID>673171425ac8d62a827ebfd26c1e51c0dd70016e822369e964467887ee3a0e7d</ID><DisplayName>amazon</DisplayName></Owner><AccessControlList><Grant><Grantee xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:type=\"Group\"><URI>http://acs.amazonaws.com/groups/global/AllUsers</URI></Grantee><Permission>READ</Permission></Grant><Grant><Grantee xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:type=\"CanonicalUser\"><ID>673171425ac8d62a827ebfd26c1e51c0dd70016e822369e964467887ee3a0e7d</ID></Grantee><Permission>FULL_CONTROL</Permission></Grant></AccessControlList></AccessControlPolicy>";
conn.putACL(bucket, key, acl, null);
}
return response;
}
catch
{
// Probably couldn't connect ro s3
return null;
}
}
