I have a function that generates a PDF file and i want to get the Uri's of the file to stoke it locally and then send it as an attachment with MailComposer. I want to know what's the difference between readAsStringAsync() and writeAsStringAsync() in FileSystem?
Both readAsStringAsync() and writeAsStringAsync() are functions of Expo FileSystem.
But the difference is readAsStringAsync() used to read a local files of the device. While writeAsStringAsync() is used to write onto a local file or create a file (if the named file does not exist on the location)
According to Expo Documentation documentation
FileSystem.writeAsStringAsync:
"Write the entire contents of a file as a string."
FileSystem.readAsStringAsync:
"Read the entire contents of a file as a string. Binary will be returned in raw format, you will need to append data:image/png;base64, to use it as Base64."
Related
I am using CGI DSPSTMF command to display stmf file on web browser. I am copying a spool file to a stmf file using CPYSPLF *STMF option. Once copied i am passing IFS location to DSPSTMF command but it is going to download automatically and when i open the download file i am getting all Junk data any idea why?
Also, i noticed it is using CONTTYPES file in CGILIB and on my server it is empty. What should be the values in it and what should i do show correct data instead of junk. I tried to use different methods to copy the file to IFS like used cpytostmf instead of cpysplf but on IFS file looks correct not the download version.
What CCSID is the resulting stream file tagged with?
use WRKLNK and option 8=Display attributes
If 65535, that tells the system the data is binary and it won't try to translate the EBCDIC to ASCII.
The correct fix is to properly configure your IBM i so that the stream file is tagged with it's correct CCSID.
Do a WRKSYSVAL QCCSID ... if your system is still set to 65535, that's the start of your problem. But this isn't programming related, you can try posting to Server Fault but you might get better responses on the Midrange mailing list
I have been given a program that uploades pdf files to an ftp server, which is something I never did. I've been asked what the behavior regarding attempting to upload a duplicate filename is. It apparently doesnt check for duplicate filenames manually, but the comand that uploads the file is My.Computer.Network.UploadFile and I can't find what happens when attempting to upload a duplicate file anywhere, does it throw an exception or overwrites the file?
It looks like My.Computer.Network.UploadFile is a wrapper around WebClient.UploadFile, and the documentation for that states:
This method uses the STOR command to upload an FTP resource.
In the FTP RFC 959 it says (I highlighted the relevant part):
STORE (STOR)
This command causes the server-DTP to accept the data
transferred via the data connection and to store the data as
a file at the server site. If the file specified in the
pathname exists at the server site, then its contents shall
be replaced by the data being transferred. A new file is
created at the server site if the file specified in the
pathname does not already exist.
So, if everything is following standards (and that part of RFC 959 hasn't been replaced, I didn't dig further!), then it should replace the existing file. However, it is possible for the server to deny overwriting of existing files, so the behavior is not guaranteed.
Of course, the best thing to do would be to try it out in your environment and see what it does.
Is it possible to get the actual file, or the file that gets copied from version control to a location?
This sounds confusing. Basically I have the file path of the version controlled file, but I need an actual path to the file because I need to make a cconsole command using powershell.exe. The file will look something like this
$/MyTeamProject/MyProject/Development/MyPowershellScript.ps1
Now, I am looking for a vb expression to see if I can get the actual file and make call the powershell.exe command from console. Any thoughts?
You may use VersionControlServer.GetItem(String path) to obtain a reference to the Item. Then use Item.DownloadFile() or Item.DownloadFile(String localPath) to copy the file locally. I have a variation of this that creates a shipment based on multiple changesets.
I have a large batch of assorted files, all missing their file extension.
I'm currently using Windows 7 Pro. I am able to "open with" and experiment to determine what application opens these files, and rename manually to suit.
However I would like some method to identify the correct file type (typically PDF, others include JPG, HTML, DOC, XLS and PPT), and batch rename to add the appropriate file extension.
I am able to open some files with notepad and review the first four bytes, which in some cases shows "%PDF".
I figure a small script would be able to inspect these bytes, and rename as appropriate. However not all files give such an easy method. HTML, JPG, DOC etc do not appear to give such an easy identifier.
This Powershell method appears to be close: https://superuser.com/questions/186942/renaming-multiple-file-extensions-based-on-a-condition
Difficulty here is focusing the method to work on file types with no extension; and then what to do with the files that don't have the first four bytes identifier?
Appreciate any help!!
EDIT: Solution using TriD seen here: http://mark0.net/soft-trid-e.html
And recursive method using Powershell to execute TriD here: http://mark0.net/forum/index.php?topic=550.0
You could probably save some time by getting a file utility for Windows (see What is the equivalent to the Linux File command for windows?) and then writing a simple script that maps from file type to extension.
EDIT: Looks like the TriD utility that's mentioned on that page can do what you want out of the box; see the -ae and -ce options)
Use python3.
import os,re
fldrPth = "path/to/folder" # relative to My Documents
os.chdir(fldrPth)
for i in os.listdir():
with open(i,'r') as doc:
st = doc.read(4)
os.rename(i,i+'.'+re.search(r'\w+',st).group())
Hopefully this would work.
I don't have test files to check the code. Take a backup and then run it and let me know if it works.
it is possible to use DotNetZip to create a zip from an accessed file (eg log file from another application) ?
so create a zip when the log file gets written through the other application
Hmm, well, yes, if you are willing to write some code.
One way to do it is to compress the file AFTER it has been written and closed.
You would need to have an app that runs with a filesystem watcher, and when it sees the log file being closed, it compresses that log file into a zip.
If you mean to imply, a distinct app that writes to a file and it automagically writes into a zip file, no I don't know of a simple way to do that. There is one possibility: if the 3rd party app accepts a System.IO.Stream in which to write the log entries. In that case, you can do that with DotNetZip. You can get a writeable stream from DotNetZip, into which the app writes content. It is compressed as it is written, and when the writing is complete, DotNetZip closes the zipfile. To use this, check the ZipFile.AddEntry() method that accepts a WriteDelegate. It's in the documentation.