How to create a file(.aspx,html,txt) in memory?
I want to create a file with a .aspx extension(or any other extension) completely in memory. Can this be done?
Right now I have a memory stream that has all the stuff I want to write to this file but I don't actually want to create a physical file on the server since then I probably have to enable write permissions for my server. What I want to do is create the file in memory and upload via ftpWebRequest.
Edit.
I must be doing something wrong because I get weird stuff in my file so weird I can't even paste it into my posts.
Basically it is a bunch of squares between everything. Like it almost seems like it fills it in for the spaces. Like If I look closely I will see the tag still but it will have a square between each letter.
Here is a portion of my code. Maybe I am using the wrong encoding?
using (MemoryStream memory = new MemoryStream())
{
UnicodeEncoding uniEncoding = new UnicodeEncoding();
// readByline is the first bunch of data I want for my new file.
memory.Write(uniEncoding.GetBytes(readByLine), 0, readByLine.Length);
// second bunch of data I want for my new file.
memory.Write(uniEncoding.GetBytes(html), 0, html.Length);
// the follow code just figure out the end of the fil开发者_开发百科e that I am
// trying to extract some information out of.
string readToEnd = reader.ReadToEnd();
int endIndex = readToEnd.IndexOf(END_FLAG);
endIndex += END_FLAG.Length;
string restOfFile = readToEnd.Substring(endIndex);
// once found I write it the memory stream.
memory.Write(uniEncoding.GetBytes(restOfFile),0,restOfFile.Length);
// now I want to upload my file. I have the same file name already
// existing on the server? Do I have to tell it override it?
FtpWebRequest request2 = (FtpWebRequest)WebRequest.Create(path);
request2.Method = WebRequestMethods.Ftp.UploadFile;
request2.Credentials = new NetworkCredential(ftpUsername, ftpPassword);
// now I am trying your code.
byte[] fileContents = memory.ToArray();
using (Stream writer = request2.GetRequestStream())
{
writer.Write(fileContents, 0, fileContents.Length);
}
FtpWebResponse test = (FtpWebResponse)request2.GetResponse();
return Content("test");
}
You can convert the MemoryStream to a byte[] and then use WebClient.UploadData to upload the file with FTP to some server without writing it on the client to disk first:
webClient.UploadData(
"ftp://remoteserver/remotepath/file.aspx"
memoryStream.ToArray());
FtpWebRequest works as well, of course, but needs a few more lines of code:
FtpWebRequest ftpRequest;
FtpWebResponse ftpResponse;
ftpRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://..."));
ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
ftpRequest.Proxy = null;
ftpRequest.UseBinary = true;
ftpRequest.Credentials = new NetworkCredential("UserName", "Password");
using (Stream stream = ftpRequest.GetRequestStream())
using (StreamWriter writer = new StreamWriter(stream, Encoding.UTF8))
{
writer.WriteLine("<html><head><title>Hello World</title></head>...");
}
ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
Well, such a file is really just plain text, with certain formatting - HTML 4.0, XHTML or such.
So yes, you can create that in memory - inside e.g. a StringBuilder, and then save it back out to disk using a StreamWriter or some other means.
If you can't or don't want to write it out to disk, you can of course also put it into a MemoryStream, and interfaces that can read from any arbitrary stream can read from the memory stream, too.
Check out the MSDN docs on FtpWebRequest and on GetRequestStream() method. It has a sample on how to upload from a stream to FTP directly:
// Get the object used to communicate with the server.
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
request.Method = WebRequestMethods.Ftp.UploadFile;
// this could be your MemoryStream, of course, that you're reading from
StreamReader sourceStream = new StreamReader(fileName);
byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
sourceStream.Close();
request.ContentLength = fileContents.Length;
request.Credentials = new NetworkCredential(ftpUsername, ftpPassword);
Stream requestStream = request.GetRequestStream();
requestStream.Write(fileContents, 0, fileContents.Length);
requestStream.Close();
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
// check the response, do whatever you need to do with it
response.Close();
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