I am outputting a PDF file in a Web browser (IE8) HttpContext.Response.writefile(fileName) and it works great. When I try to save the file, it will give me the name of the ashx handler as a default. I would like to actually pass the real name.
I tried to add header information as follow:
context.Response.AddHeader("content-disposition", "attachment; filename=" + fileInfo.Name);
And it works but I do not want the user to have to choose between open and save, i want the file to open normally and if the user chooses to save it then the dialog would give him/her the default filename.
I tried also:
context.Response.AddHeader("content-disposition", "inline; filename=" + fileInfo.Name);
Or just, like Scott Hanselman suggested in his blog.
context.Response.AddHeader("content-disposition", "filename=" + fileInfo.Name);
None of those work for me. Does anybody have any ideas?
See test cases at http://greenbytes.de/tech/tc2231/#inlwithasciifilenamepdf - it seems that this is simply a missing feature in IE.
I also came across this problem.
What helped me was to also set the contenttype to application/pdf (instead of application/x-pdf, which is outdated)
response.setContentType("application/pdf");
response.setHeader("Content-disposition", "inline; filename=\"Report.pdf\"");
In case of INLINE, it seems that Internet explorer is using the last parameter in the URL to build the filename.
For example if your url is http://doc.com/131231231
IE will prompt you to save the file as 131231231.pdf
If you need a filename for example foo_131231231.pdf
you can hack the IE by using this url: http://doc.com/foo_131231231
You may suffer to change your app a bit to expect such ugly parameter, but at the end your app
will work as you expect.
Related
According to the Discord.NET documentation page for the EmbedBuilder class, the syntax (converted to VB) to add a local image to an EmbedBuilder object should look something like this:
Dim fileName = "image.png"
Dim embed = New EmbedBuilder() With {
.ImageUrl = $"attachment://{fileName}"
}.Build()
I'm trying to use something like this to add a dynamically created image to the EmbedBuilder, but I can't seem to get it to work properly. Here's basically what I've got:
Dim TweetBuilder As New Discord.EmbedBuilder
Dim DynamicImagePath As String = CreateDynamicImage()
Dim AttachURI As String = $"attachment:///" & DynamicImagePath.Replace("\", "/").Replace(" ", "%20")
With Builder
.Description = "SAMPLE DESCRIPTION"
.ImageUrl = AttachURI
End With
MyClient.GetGuild(ServerID).GetTextChannel(PostChannelID).SendMessageAsync("THIS IS A TEST", False, Builder.Build)
My CreateDynamicImage method returns the full path to the locally created image (e.g., C:\Folder\Another Folder\image.png). I've done a fair amount of "fighting"/testing with this to get past the Url must be a well-formed URI exception I was initially getting because of the [SPACE] in the path.
MyClient is a Discord.WebSocket.SocketClient object set elsewhere.
The SendMessageAsync method does send the Embed to Discord on the correct channel, but without the embedded image.
If I instead send the image using the SendFileAsync method (like so):
MyClient.GetGuild(ServerID).GetTextChannel(PostChannelID).SendFileAsync(DynamicImagePath, "THIS IS A TEST", False, Builder.Build)
the image is sent, but as a part of the message, rather than included as a part of the Embed (this is expected behavior - I only bring it up b/c it was a part of my testing to ensure that there wasn't a problem with actually sending the image to Discord).
I've tried using the file:/// scheme instead of the attachment:/// scheme, but that results in the entire post never making it to Discord at all.
Additionally, I've tried setting the ImageUrl property to a Web resource (e.g., https://www.somesite.com/someimage.png) and the Embed looks exactly as expected with the image and everything when it successfully posts to Discord.
So, I'm just wondering at this point if I'm just missing something, or if I'm just doing it completely wrong?
I cross-posted this to issue #1609 in the Discord.Net GitHub project to get a better idea of what options are available for this and received a good explanation of the issue:
The Embed (and EmbedImage) objects don't do anything with files. They simply pass the URI as configured straight into Discord. Discord then expects a URI in the form attachment://filename.ext if you want to refer to an attached image.
What you need to do is use SendFileAsync with the embed. You have two options here:
Use SendFileAsync with the Stream stream, string filename overload. I think this makes it clear what you need to do: you provide a file stream (via File.OpenRead or similar) and a filename. The provided filename does not have to match any file on disk. > So, for example:
var embed = new EmbedBuilder()
.WithImageUrl("attachment://myimage.png")
.Build();
await channel.SendFileAsync(stream, "myimage.png", embed: embed);
Alternatively, you can use SendFileAsync with the string filePath overload. Internally, this gets a stream of the file at the path, and sets filename (as sent to Discord) to the last part of the path. So it's equivalent to:
using var stream = File.OpenRead(filePath);
var filename = Path.GetFileName(filePath);
await channel.SendFileAsync(stream, filename);
From here, you can see that if you want to use the string filePath overload, you need to set embed image URI to something like $"attachment://{Path.GetFileName(filePath)}", because the attachment filename must match the one sent to Discord.
I almost had it with my code above, but I misunderstood the intention and usage of the method and property. I guess I thought the .ImageUrl property somehow "automatically" initiated a Stream in the background. Additionally, I missed one very important piece:
As it's an async method, you must await (or whatever the VB.NET equivalent is) on SendFileAsync.
So, after making my calling method into an async method, my code now looks like this:
Private Async Sub TestMessageToDiscord()
Dim Builder As New Discord.EmbedBuilder
Dim AttachmentPath As String = CreateDynamicImage() '<-- Returns the full, local path to the created file
With Builder
.Description = "SAMPLE DESCRIPTION"
.ImageUrl = $"attachment://{IO.Path.GetFileName(AttachmentPath)}"
End With
Using AttachmentStream As IO.Stream = IO.File.OpenRead(AttachmentPath)
Await MyClient.GetGuild(ServerID).GetTextChannel(PostChannelID).SendFileAsync(AttachmentStream, IO.Path.GetFileName(AttachmentPath), "THIS IS A TEST", False, Builder.Build)
End Using
End Sub
Now, everything works exactly as expected and I didn't have to resort to uploading the image to a hosting site and using the new URL (I actually had that working before I got the response on GitHub. I'm sure that code won't go to waste).
EDIT
Okay, so I still ended up going back to my separately hosted image option for one reason: I have a separate event method that modifies the original Embed object during which I want to remove the image and replace the text. However, when that event fired, while the text was replaced, the image was "moved" to the body of the Discord message. While I may have been able to figure out how to get rid of the image entirely, I decided to "drop back and punt" since I had already worked out the hosted image solution.
I've tried everyting I could, but I got stuck at the same point at where you are now.
My guesses are that Discord doesn't like the embedded images from https://cdn.discordapp.com/attachments, and only accepts the new files from https://media.discordapp.net. I might be wrong though, this is the way it worked for me.
I believe it's only a visual glitch, as I found if you send a link for an image from cdn.discordapp.com/attchments in your regular Discord client, it bugs out and shows an empty embed for some reason.
That would make sense since the default link used in an embedded image actually starts with https://cdn.discordapp.com/attachments/...
You could solve this issue by using https://media.discordapp.net, but it seems like Discord.net is configured to use the old domain.
I need to download a file from a FTP Server.
The path and the file name is
ftp://10.17.20.60/ata0b/OpconData/StationData/Station.dat
When i want to see all Files in the StationData directory i use
Dim request As Net.FtpWebRequest = Net.FtpWebRequest.Create("ftp://10.17.20.60/%2F/ata0b/OpconData/StationData/")
request.Method = Net.WebRequestMethods.Ftp.ListDirectory
request.Credentials = New Net.NetworkCredential(form1.txtFTPUser.Text, form1.txtFTPPasswort.Text)
Dim response As Net.FtpWebResponse = request.GetResponse()
With this i get the content of the directory. Of course i see the Station.dat file. I was able to make it work since i use the %2F parameter to change the directory to ata0b.
So far so good!
Now i want to download the Station.dat file. But i always get an error (550) File unavailable (e.g., file not found, no access) at the last line in code below.
My code looks like this:
'Create Request To Download File'
Dim wrDownload As FtpWebRequest = WebRequest.Create("ftp://10.17.20.60/%2F/ata0b/OpconData/StationData/Station.dat")
'Specify That You Want To Download A File'
wrDownload.Method = WebRequestMethods.Ftp.DownloadFile
'Specify Username & Password'
wrDownload.Credentials = New NetworkCredential("opconadmin", "OpconAdmin")
'Response Object'
Dim rDownloadResponse As FtpWebResponse = wrDownload.GetResponse()
What's my failure? In my point of view the file must be at the given path. I really hope somebody can give me a hint.
BR
Steffen
The error means what it says.But let me explain why this might occur :
1 • The file might be unavailable/not present on the server
2 • You might face 'Security Problem on file' issue .
There could be other causes like server timeout or other..
However,you need to find out what the error message really is.TO do this, you can use a TRY-CATCH statement. E.g.
Try
'YOur code here
Catch e as WebException
Msgbox(e.Message) 'you can use e.tostring for more details
After you find out what exactly is the problem,then you'ld be able to solve it.Take a look at these :
http://www.dreamincode.net/forums/topic/76361-file-upload-to-server/
https://nickstips.wordpress.com/2010/10/25/c-ftp-upload-error-the-remote-server-returned-an-error-550-file-unavailable-e-g-file-not-found-no-access/
https://forums.asp.net/t/1777881.aspx
But one thing i'ld like to suggest is to check whether you have any Permission/Security issues or not.And after you get the exact error message,it may(or may not) turn out to be that you don't have enough disk space.However,try my solution and leave a reply for further assistance.
UPDATE
Try replacing the FTP link with this : ftp://10.17.20.60//ata0b/OpconData/StationData/Station.da
My Sencha Touch 2 application has an 'Export' button, which creates an Excel file with the data of the selected offer.
After the user clicks the button, i want the (server side) export process to be started, and, once completed, the user to be prompted to select a filename and location, OR that the file is automatically downloaded. How do i do that? Does anyone have an example?
For Excel specifically I'm not 100% sure, but this might help you get started or if a CSV is acceptable...
I'm sure you could pass the file reference to a var instead of the string but I have yet to try it.
If you paste the js below into the console you can see how this works. Pretty basic. Maybe try the returned value from the server to see if that works then if it does you can build a function around it to happen when needed.
csvHeading = 'HA, HB, HC, HD \n';
csvData = 'r3a, r3b, r3c, r3d \n' +
'r2a, r2b, r2c, r2d';
CSVFile = csvHeading + csvData;
window.location = 'data:text/csv;charset=utf8,' + encodeURIComponent(CSVFile);
So, using vb.net, I retrieve from my server the byte data for a file that the user wishes to download. I always know what the filename and extension is, but what I don't know is how to start downloading the byte data and in the proper file format. How do I got about doing this?
EDIT: Just to clarify, I already retrieve the data in byte format in code, I just need to download it as the proper file type which is also known. I'm keeping the URL to the file hidden at all times so it's never exposed.
If you want to download the file directly to the hard drive, the easiest solution is to use WebClient.DownloadFile. The MSDN page contains a nice example.
If you want to put the file into a byte array instead of a file on disk, use WebClient.DownloadData instead:
Dim myWebClient As New WebClient()
Dim myByteArray = myWebClient.DownloadData("http://...")
Again, a larger example can be found on the MSDN page.
If you want your program to stay responsive while downloading, check out the asynchronous versions of those methods.
EDIT: I'm still having a hard time understanding your situation, but it you already have a byte array and just want to write it to the disk, you can use File.WriteAllBytes:
File.WriteAllBytes("C:\my\path\myfile.bin", myByteArray)
Okay, I figured it out. Using BinaryWrite with the other Response functions like AddHeader and ContentType I got it to work. GetMimeType is a function I made. Code below:
Response.Clear()
Response.AddHeader("Content-Disposition", "attachment; filename=" + FileName)
Response.ContentType = GetMimeType(FileName)
Response.BinaryWrite(data)
Response.End()
Response.Flush()
Thanks to those who tried to help!
I'm trying to write/create a JSON file from a AIR app, I'm trying not so show a 'Save as' dialogue box.
Here's the code I'm using:
var fileDetails:Object = CreativeMakerJSX.getFileDetails();
var fileName:String = String(fileDetails.data.filename);
var path:String = String(fileDetails.data.path);
var f:File = File.userDirectory.resolvePath( path );
var stream:FileStream = new FileStream();
stream.open(f, FileMode.WRITE );
stream.writeUTFBytes( jsonToExport );
stream.close();
The problem I'm having is that I get a 'Error 3013. File or directory in use'. The directory/path is gathered from a Creative Suite Extension I'm building, this path is the same as the FLA being developed in CS that the Extension is being used with.
So I'm not sure if the problem is that there are already files in the directory I'm writing the JSON file to?
Do I need to add a timer in order to close the stream after a slight delay, giving some time to writing the file?
Can you set up some trace() commands? I would need to know what the values of the String variables are, and the f.url.
Can you read from the file that you are trying to write to, or does nothing work?
Where is CreativeMakerJSX.getFileDetails() coming from? Is it giving you data about a file that is in use?
And from Googling around, this seems like it may be a bug. Try setting up a listener for when you are finished, if you have had the file open previously.
I re-wrote how the file was written, no longer running into this issue.