I am using using the Aspose.Email to get attachments out of an Outlook email like this:
var mailMessage = Aspose.Email.Mail.MailMessage.Load(stream);
var attachments = Aspose.Email.Outlook.MapiMessage.FromMailMessage(mailMessage).Attachments;
var pdfAttachment = attachments.ToList()[attachmentIndexDesired];
Then, I am loading the attachment into DataLogics like this:
var pdfStream = new MemoryStream(pdfAttachment.BinaryData);
var pdfDocument = new Datalogics.PDFL.Document(pdfStream);
Here I get the following exception:
PDF Library Error: File does not begin with '%PDF-'. Error number: 537001985
I cannot find anything on this error anywhere.
Note that the initial stream object above is a *.msg Outlook file and originates from a sharepoint SPFile. Also note that if the stream object SPFile is itself a PDF file (as opposed to an attachment to a *.msg file) I can load it into DataLogics just fine.
I know the error is being thrown by the DataLogics library, but is there something about how I am getting the attachment that could be changed/improved that would prevent this error from occurring?
Any ideas?
So just a few minutes ago I was trying to grab the BinaryData from the attachment and convert it to a string that I could read so I could visually inspect its contents. So I did this.
(new StreamReader(new MemoryStream(curAttachment.BinaryData))).ReadToEnd()
When I did that, it printed this error:
"Evaluation copy of Aspose.Email limits to extract only 3 attachments in the messages. Please contact sales#aspose.com to purchase a valid license."
Kind of strange as I am using my production license, but either way I went ahead and deleted some attachments from the parent *.msg file (it previously had 4) and tried to load it again. Then... poof... it started working.
Seems like it should throw an exception or something instead as that would have made this issue a lot easier to track down.
Related
string docuAddr = #"C:\Users\psimmon\source\repos\PDFTESTAPP\PDFTESTAPP\TempForms\forms-www.courts.state.co.us-Forms-PDF-JDF1117.pdf";
byte[] bytes = Encoding.Unicode.GetBytes(docuAddr);
PdfLoadedDocument loadedDocument = new PdfLoadedDocument(bytes, true);---blows here
PdfLoadedForm myForm = loadedDocument.Form;
PdfLoadedFormFieldCollection fields = myForm.Fields;
not sure what I have done wrong here, but the PDF file is opening, either in a browser or a fileexployer window. so it has to be me, guessed at most of this, all you very smart folks, I could use your gray matter. forgive my stupidity.
The reported exception “could not find valid signature (%PDF-)” may occurs due to the file is not a PDF document. We suspect it seems the other format files are saved with the “.pdf” extension. We could not open and repair this type of document on our end, we have already added the details in our documentation,
Please find some of the following corrupted error messages that cannot be repaired:
UG: https://help.syncfusion.com/file-formats/pdf/open-and-save-pdf-file-in-c-sharp-vb-net#possible-error-messages-of-invalid-pdf-documents-while-loading
If you want to find this type of corrupted document, Syncfusion PDF Library provides support to check and report whether the existing PDF document is corrupted or not with corruption details and structure-level syntax errors.
UG: https://help.syncfusion.com/file-formats/pdf/working-with-document#find-corrupted-pdf-document
Blog: https://www.syncfusion.com/blogs/post/how-to-find-corrupted-pdf-files-in-c-sharp.aspx
KB: https://www.syncfusion.com/kb/9686/how-to-identify-the-corrupted-pdf-document-using-c-and-vb-net
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 have to rephrase my question, basically my request is very straight forward, i want to display Asian characters in the generated pdf file from iText7.
As of now i have download the NotoSansCJKsc-Regular.otf file and assign a variable to hold the path, below is my code:
public static string FONT = #"D:\Projects\Resources\NotoSansCJKsc-Regular.otf";
PdfWriter writer = new PdfWriter(#"C:\temp\test.pdf");
PdfDocument pdfDoc = new PdfDocument(writer);
Document doc = new Document(pdfDoc, PageSize.A4);
PdfFont fontChinese = PdfFontFactory.CreateFont(FONT, PdfEncodings.IDENTITY_H);
doc.SetFont(fontChinese);
but the issue i am facing now is whenever the code runs to this section:
PdfFont fontChinese = PdfFontFactory.CreateFont(FONT, PdfEncodings.IDENTITY_H);
i am always getting this error: The request could not be performed because of an I/O device error. and this error doesn't make sense to me and I am struggling to find out the solution, could someone in here had the similar issue plz, the code is in C#.
Many thanks.
I can confirm that above code is working as expected, the .otf file that I was originally downloaded was corrupted, hence I got above error.
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
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.