I'm trying to read content from a file in nodeREF (ps: the treatment is in a behavior). I tried to get a plainText with:
ContentReader reader = contentService.getReader(nodeRef,
ContentModel.PROP_CONTENT);
it works only with .txt files not with pdf and docs. The problem that alfresco could not read the file after that so is there any other solution?
Related
If there is no extension in the file name, then I cannot get the contentType to create FileStreamResult.
Example:
byte[] byteFile = await someDirectory.GetFileContentAsync(fileName);
string contentType;
new FileExtensionContentTypeProvider().TryGetContentType(fileName, out contentType); // fileName without extension
return (byteFile, contentType); // contentType == null
Is there a way to get the extension not from the name?
Looking at the code for FileExtensionContentTypeProvider, there's a predefined list of file extensions and their corresponding mime-types. TryGetContentType method will return null if the file extension is not in that list.
If you get a file without file extension, one possible way would be to find the kind of file by reading it's metadata but that's really complicated. For example, reading the file contents you can find out if the file is an image and if it is of type png. But you will need to write code to identify each type of image (png, bmp, gif etc.).
A simpler way would be to infer null content type as default content type. In case of Azure Storage, it will be application/octet-stream.
My question is a bit similar to this one but it is with ASP.NET and my requirements are slightly different: Android append files to a zip file without having to re-write the entire zip file?
I need to insert data to a zip-file downloaded by users (not much 1KB of data at most, this is data for Adword off-line conversion actually). The zip-file is downloaded through an ASP.NET website. Because the zip file is already large enough (10's of MB) to avoid overloading the server, I need to insert these data without re-compressing everything. I can think of two ways to do this.
Way A: Find a zip-technology that lets embed a particular file in the ZIP file, this particular file being embedded uncompressed. Assuming there is no checksum, it'd be then easy to just override the bits of this un-compressed file with my specific data, in the zip file itself. If possible, this would have to be supported by all unzip tools (Windows integrated zip, winrar, 7zip...).
Way B: Append an extra file to the original ZIP file without having to recompress it! This extra file would have to be stored in an embedded folder in the ZIP file.
I looked a bit at SevenZipSharp which has an enumeration SevenZip.CompressionMode with values Create and Append that leads me to think that Way B could be implemented. DotNetZip seems also to work pretty well with Stream according to FAQ.
But if Way A could be possible I'd prefer it much since no extra zip library would be needed on the server side!
Ok, thanks to DotNetZip I am able to do what I want in a very resource efficient way:
using System.IO;
using Ionic.Zip;
class Program {
static void Main(string[] args) {
byte[] buffer;
using (var memoryStream = new MemoryStream()) {
using (var zip = new ZipFile(#"C:\temp\MylargeZipFile.zip")) {
// The file on which to override content in MylargeZipFile.zip
// has the path "Path\FileToUpdate.txt"
zip.UpdateEntry(#"Path\FileToUpdate.txt", #"Hello My New Content");
zip.Save(memoryStream);
}
buffer = memoryStream.ToArray();
}
// Here the buffer will be sent to httpResponse
// httpResponse.Clear();
// httpResponse.AddHeader("Content-Disposition", "attachment; filename=MylargeZipFile.zip");
// httpResponse.ContentType = "application/octe-t-stream";
// httpResponse.BinaryWrite(buffer);
// httpResponse.BufferOutput = true;
// Just to check it worked!
File.WriteAllBytes(#"C:\temp\Result.zip", buffer);
}
}
i want to create a new file and store the encrypted string into that file. how can i create a new text file and store this in that file using java.i found some java codes online which are not clear to me.
encrypted = cipher.doFinal(strContent.toString().getBytes());
You can simply create the file in java by writing the following line:
File file=new File("C:/users/new.txt"); /You can give the address where you want to create the file with file name as here it is "new.txt"/
For wiriting the file you can make the object of BufferedWriter with parameter of FileWriter(file name).EX-
BufferedWriter bw=new BufferedWriter(new FileWriter(file));
now use bw.write(String) to write string in the file.
Note:-Don't forget to close the BufferedWriter object simply by typing bw.close().
I am trying to save a jpeg image in an uploads folder which has correct permissions setup. When I test the file is being saved (eg: images/uploads/Winter.jpg) but if I try to view the image in my browser or if I attempt to open the image using anything else the image does not display.
I think that the file is not being encoded correctly before saving it to disk but am not very experienced dealing with the saving of files, encoding. Does the below code look ok or do I need to encode the file being uploaded somehow before saving it to disk?
String imgPath = "newsletter\\images\\uploads\\";
String filename = System.IO.Path.GetFileName(upload.PostedFile.FileName);
filepath = imgPath + filename;
filepath = Request.PhysicalApplicationPath + filepath;
upload.PostedFile.SaveAs(filepath);
The file saves to the correct folder but is only 150bytes in size. If I try to browse to the file and view it with an image viewer it does not display correctly.
Encoding shouldn't be a problem - the raw data isn't changing. However, it's possible the browser isn't sending all the data, or that the upload control is deleting the data before you're saving it.
Make sure that you call .SaveAs() before the page begins unloading, and before any additional postbacks. I think we'll need to see more surrounding code to help further.
Another note - by allowing the existing file extension to be used, you're allowing users to upload .aspx files, which could subsequently be executed through a request. Safe filenames are GUIDs and whitelisted file extensions. Using un-sanitized uploaded path information is very dangerous. If you re-use filenames, sanitize them to alphanumerics.
I have created a iTextSharp PDF file that is created to a MemoryStream. But I now need to pass this file to the Kentico media library.
I would be grateful if anyone could show my how to do this. The code I have currently is:
//Media Library Info - takes Media Library Name and Website Name
MediaLibraryInfo libraryInfo = MediaLibraryInfoProvider.GetMediaLibraryInfo("MyLibrary", CMSContext.CurrentSiteName);
//Folder in Media Library where Item will be Inserted
string mediaLibraryFolder = folder;
//create media file info item - takes the relative path to the document, the library ID, and the folder name where the document will be located within the media library
MediaFileInfo fileInfo = new MediaFileInfo();
fileInfo.FileLibraryID = libraryInfo.LibraryID;
fileInfo.FileBinaryStream = file;
fileInfo.FileName = title.Replace(" ", "").Trim();
fileInfo.FileTitle = title;
fileInfo.FileDescription = description;
fileInfo.FileExtension = ".pdf";
fileInfo.FileMimeType = "application/pdf";
fileInfo.FilePath = String.Concat("/", folder, "/", title.Replace(" ", "").Trim(), ".pdf");
// Save media file info
MediaFileInfoProvider.ImportMediaFileInfo(fileInfo);
I keep getting database errors due to nullable columns e.g. FileSize, FileExtension, etc. Since I am using a MemoryStream I can't find a way to supply all that information.
Am I using the MediaFileInfo API incorrectly in conjunction with a MemoryStream file?
Actually, I don't think that you need to do anything that RadekM said. You can simply stream the file to disk to save it, and then call the import method you're using to import it into the media library.
For example, a Media Library called "Site Images" for the site "MySite" will have a folder on disk at /MySite/media/Site Images/. Drop your file into there (you can use sub folders if you want). At this point the file is "in" the media library, but it hasn't been imported yet, so you wont be able to use it. You can see this is true by viewing the Media Library in the CMS Desk interface. However, this file has not yet been imported into the Media Library and you should see an exclamation point inside a yellow triangle next to your new file.
So after you get the file in the right location, you can use that file information to populate the MediaFileInfo object and Import the file.
Could you adapt this code and pass the bytes of the PDF from here?
programmatically adding files to the Kentico Media Library
Regrettably, MemoryStream class does not contain these informations, so you can’t gain them from this object directly. Anyway, if you want to supply FileSize property, you can use ms.Length property as a workaround. Basically, this particular property is not important, so it can be even some dummy number.
As for extension – are you saying that you are receiving error saying this property is null, although you set it like „fileInfo.FileExtension = ".pdf";“? Can you clarify?
Also please note that you need to set some other properties, FileSiteID, FileCreatedWhen, FileGUID and FilePath (path inside given media library). If you have full source code of Kentico API, you can get an inspiration from constructor of MediaFileInfo object in \MediaLibrary\MediaFileInfo.cs class.