private Dir422 TraverseToDirectory(Dir422 currentLocation, string[] uriPieces, WebRequest req)
{
File422 fileAtRoot = null;
//Iterate over all path parts until we get to the file or directory wanted
for (int item = 0; item < uriPieces.Length - 1; item++)
{
fileAtRoot = currentLocation.GetFile(uriPieces[item]);
if (fileAtRoot == null)
{
currentLocation = currentLocation.GetDir(uriPieces[item]);
if (currentLocation == null)
{
req.WriteNotFoundResponse("<html>404 File Not Found<br>" + "</html>");
}
}
else
{
break;
}
}
return(currentLocation);
}
public override void Handler(WebRequest req)
{
//If the request URI doesn't start with the proper service URI
if (!req.GetUri().StartsWith(this.ServiceURI, StringComparison.CurrentCulture))
{
throw new InvalidOperationException();
}
//Get Uri pieces
string[] uriPieces = GetUriPeices(req);
//Decode path
uriPieces = DecodePath(uriPieces);
//Get the root directory
Dir422 currentLocation = FileSystem.GetRoot();
//Handle PUT requests
if (req.GetHTTPType() == "PUT")
{
FileStream newFileStream = null;
try
{
currentLocation = TraverseToDirectory(currentLocation, uriPieces, req);
if (currentLocation.ContainsFile(uriPieces[uriPieces.Length - 1], false) == true)
{
req.WriteNotFoundResponse("<html>File Already Exists!</html>");
}
else
{
File422 newFile = currentLocation.CreateFile(uriPieces[uriPieces.Length - 1]);
newFileStream = (FileStream)newFile.OpenReadWrite();
CopyBytes(req.GetBody(), newFileStream, req.GetBody().Length);
newFileStream.Close();
string response = "<html>File Uploaded!</html>";
string header = string.Format(putHeaderTemplate, req.GetHTTPVersion(), "text/html", response.Length);
req.WriteHTMLResponse(header + response);
}
}
catch (Exception e)
{
if (newFileStream != null)
{
newFileStream.Close();
}
}
}
//Handle GET requests
else
{
//If we're at the root directory, respond with a list
if (uriPieces.Length == 0)
{
string response = BuildDirHTML(FileSystem.GetRoot());
string header = string.Format(dirHeaderTemplate, req.GetHTTPVersion(), "text/html", response.Length);
req.WriteHTMLResponse(header + response);
}
else
{
currentLocation = TraverseToDirectory(currentLocation, uriPieces, req);
//If the wanted item is a file, respond with a file
if (currentLocation.GetFile(uriPieces[uriPieces.Length - 1]) != null)
{
//If we have a range header, we need to use a partial response header
if (req.GetHeaders().ContainsKey("range"))
{
string header = GetRangeHeader(req, currentLocation, uriPieces);
req.WriteHTMLResponse(header);
}
//Write repsonse for displaying file contents
else
{
Stream selectedFile = currentLocation.GetFile(uriPieces[uriPieces.Length - 1]).OpenReadOnly();
string header = string.Format(fileHeaderTemplate, req.GetHTTPVersion(), GetContentType(currentLocation.GetFile(uriPieces[uriPieces.Length - 1]).Name), selectedFile.Length);
selectedFile.Close();
req.WriteHTMLResponse(header);
}
BuildFileHTML(currentLocation.GetFile(uriPieces[uriPieces.Length - 1]), req);
}
//If the wanted item is a directory, respond with a directory listing
else
{
//Write response for displaying directory
if (currentLocation.GetDir(uriPieces[uriPieces.Length - 1]) != null)
{
string response = BuildDirHTML(currentLocation.GetDir(uriPieces[uriPieces.Length - 1]));
string header = string.Format(dirHeaderTemplate, req.GetHTTPVersion(), "text/html", response.ToString().Length);
req.WriteHTMLResponse(header + response);
}
//Request item could not be found
else
{
req.WriteNotFoundResponse("<html>404 File Not Found<br>" + "</html>");
}
}
}
}
}
