I am building a simple ticket system which creates a dynamic generate .pdf file and emails it as an attachment.
Right now i am testing with static pdf file, but i notice tcpdf deletes the file on the server.
1/ HOw can i prevent this and keep a copy on the server?
Regards
Try the following code, use 'F' as the second argument in the TCPDF output function and specify a path to store the file on server
$this->pdf->Output('/path/example_001.pdf', 'F');
Related
So i have this ASP.Net app and i want to allow the client to have the option to download an xlsx file, im using the HttpContext.Response to set the Content Type "application/xlsx" and the Content-Disposition sets the file name with the extension .xlsx, the download works correctly.
if I change the file name to .pdf then the file is downloaded as a pdf, when I checked the developer tool network response the Content Type was "application/xlsx" and in another test I change the name fileto .png and the file was downloaded as an image (it did not work, but it was shown as an image)
So what is the content type supposed to do, does it bring some sort of security how do i make sure that the user can only downloads the file associated to the content type?
Im using response.BinaryWrite()
A content type indicates what type of content is being transmitted over http regardless of the content name. For example as you already have tested, you can transmit a pdf file naming it as a .png file.
It is the browser or the operating system that is representing a file with the name .png as an image to you. Another software would treat a pdf file with .png name as a pdf file.
The name of the file matters after the download is complete. But the software that is handling the download (in this case a web browser) actually may need to know the original media type. And you might want to write client side codes that would need to know what type of file is being transferred from the server regardless of the file name.
I have found documentation for uploading an image from iOS to a blob container in Azure - https://learn.microsoft.com/en-us/azure/storage/blobs/storage-ios-how-to-use-blob-storage
using the https://github.com/Azure/azure-storage-ios library
But I wish to upload directly to a file share. Is there a way to do this?
It needs to be implemented using SAS authentication.
Unfortunately I am not familiar with iOS programming thus I will not be able to provide you any code. However you can use the steps below to write code.
Assuming you have a SAS URL for the file share in which you wish to upload the file, you can simply use Azure Storage REST API to upload the file in a file share. You should be able to use built-in HTTP functionality in the programming language of your choice to do that.
Let's assume that you have a SAS URL for the file share in the following format: https://<account-name>.file.core.windows.net/<share-name>?<sas-token>.
First thing you would need to do is insert the file name that you wish to upload in this SAS URL so that you get a SAS URL for the file. Your SAS URL would look something like: https://<account-name>.file.core.windows.net/<share-name>/<file-name>?<sas-token>.
Next you would need to create an empty file. You will use Create File REST API operation. Do not worry about the Authorization request header there as it is already included in the SAS. Only request header you would need to include is x-ms-content-length value of which should be the size of the file you want to upload. This will create an empty file having size as that of the file you want to upload.
Once this operation completes, next you would need to upload the data in the empty file you just created. You will use Put Range operation. The request headers you need to include are x-ms-range (value of which should be bytes=0-file-length - 1) and Content-Length (value of which should be the length of your file). The request body will contain the file contents.
Using these steps you should be able to upload a file in a file share.
For safety reasons I would like to rename the files submitted to my application before uploading them to S3. For local storage I can use Storage::move afterwards. But for S3 I am having trouble. How do I do it? Also, instead of using move is it possible to rename them before storing? Right no my app renames the files without any actions to something like phpK69RGR.jpg May be I can just configure the random string method? I also tried using the php rename command before upload but my webservice started erroring out. I know its a very basic question but for some reason I am having trouble with it.
This is outlined in the docs.
$request->file('photo')->move($destinationPath, $fileName);
$fileName is an optional parameter that renames the file.
So with that, you could simply place this inside your controller:
//Generate random name
$fileName = str_random(30);
$request->file('photo')->move($destinationPath, $fileName);
I'm not very familiar with file handling in ruby. A problem I've come accross is that reading and writing a binary file doesn't produce exactly the same file.
clone = Tempfile.new(tempfile.original_filename)
FileUtils.copy_stream(tempfile, clone)
clone.flush
From the image below it is clear that it is not an exact file copy, when I try to open the newly created file in an image viewer it reports that the file is corrupt. I have tried copying the file in different ways such as clone.write(tempfile.read), etc. without success.
*The file viewer also indicates the original is ANSI Dos/Windows and the clone is ANSI Macintosh. The file size also differs by about 200 bytes.
What I'm trying to accomplish is actually simply using a Tempfile twice. A file is uploaded via rails and given to me as a Tempfile. I want to submit it to two different restful services and RestClient.post closes the file automatically. Another option would be to submit some sort of in memory stream clone to RestClient so that it can not close my file. If I submit File.open(tempfile.path) to RestClient it produces the same broken file, this indicates that the reading is the problem and not the writing. If I submit the original Tempfile object to RestClient it works perfectly but then it is closed and deleted and I cannot send it again.
Please help!
Regards,
Pierre
It would be much more helpful to see a hex view of these files instead of a text editor's intepretation. My guess is that at least one of the files is not opened in binary mode. In Ruby 1.9, try
open(filename, 'rb')
open(filename, 'wb')
Tempfile.new(filename, :binmode => true)
for opening a file for reading / writing and to create a binary temporary file, respectively.
I have a upload text file field, and with it I plan to save the file somewhere and then store the location of the file in a database. However, I want to make sure the file they uploaded is a .txt file, and not, say, an image file. I imagine this happens in the validation step. How does one validate such a thing? Also, how do you get the filename of the uploaded file? I could always just check if it said '.txt' but for future reference knowing how to validate without just the filename would be helpful.
Trying to validate the contents of a file based on the filename extension is opening the door for major hackerdom. It's trivial to change the extension and upload the file.
If you are on a Mac/Linux/Unix-based system the OS "file" command is the standard because it looks inside the file for key bytes that flag file types. http://en.wikipedia.org/wiki/File_(Unix) I'm not sure what's available for Windows, but this might help: Determine file type in Ruby
One way of doing it, the simple way really, would be to pass the file through an image loader, preferably one that handles multiple common formats, and see if it throws an error.
The other way is to manually check the file header for common image format headers. For example, .bmp files start with BM. Other formats have their own specific markings you can use.