Using QMake, I read some boiler plate code, make modifications and write the modified code to a file.
However, I get very strange results. I have simplified the problem down to the following:
# Open boiler plate file
interfaceBoilerPlateCode = $$cat($$boilerPlateFile, blob)
# Make sure we read the right content
message("Content read: $$interfaceBoilerPlateCode")
# Write the read text into a file
output = $$system(echo $$interfaceBoilerPlateCode >> $$targetFile) # Doesnt work
output = $$system(echo "Howde" >> $$targetFile) # This works
The file being read is a plain text file containing only the string "Howde".
The contents of the file get read correctly.
However, when I try and write the contents of the file to another target file, I get no output (literally: no errors/warnings but no new file generated). However, if I use echo with just a string defined in the code itself (as in the last line of snippet above), a new file gets generated with the string "Howde" inside it.
What is going on? What am I doing wrong that the penultimate line does not generate a new file?
Use write_file. Instead of:
$$system(echo $$content >> $$file_path)
use
write_file($$file_path, $$content)
Related
I tried PGP encrypting a file in ChoPGP library. At the end of the process it shows embedded file name along with the whole original file name path.
But I thought it will show only the filename without the whole path. Which I intend to work on and figure out a way to do so?
Doing the following:
using (ChoPGPEncryptDecrypt pgp = new ChoPGPEncryptDecrypt())
{
pgp.EncryptFile(#"\\appdevtest\c$\appstest\Transporter\test\Test.txt",
#"\\appdevtest\c$\appstest\Transporter\test\OSCTestFile_ChoPGP.gpg",
#"\\appdevtest\c$\appstest\Transporter\pgpKey\PublicKey\atorres\atorres_publicKey.asc",
true,
true);
}
which will result in:
But I would like to only extract the Test.txt in the end something
like this:
Looking at this line from the ChoPGP sources: https://github.com/Cinchoo/ChoPGP/blob/7152c7385022823013324408e84cb7e25d33c3e7/ChoPGP/ChoPGPEncryptDecrypt.cs#L221
You may find out that it uses internal function GetFileName, which ends up with this for the FileStream: return ((FileStream)stream).Name;.
And this one, according to documentation, Gets the absolute path of the file opened in the FileStream..
So you should either make fork of ChoPGP and modify this line to extract just filename, or submit a pull request to the ChoPGP. Btw, it's just a wrapper around the BouncyCastle so you may use that instead.
I have an array with several files in it. And i want to loop through these files. For each file i want to run a command.
result = [rtlvis_20190518_13.35.48_00001.bin, rtlvis_20190518_13.35.48_00002.bin, rtlvis_20190518_13.35.48_00003.bin, rtlvis_20190518_13.35.48_00004.bin, rtlvis_20190518_13.35.48_00005.bin]
something like: for each file in result run the following command read_rtlvis_v12,a,c,t,g,FILE="file",/CFILEONLY
Where file is each one of the files in result
Ive tried the following
FOREACH file, result do begin read_rtlvis_v12,a,c,t,g,FILE="file",/CFILEONLY
The error i get is in the read_rtlvis_v12 code. But my question is, is this the right way to go about doing a for loop with this kind of command.
Am i setting FILE="file" correctly, where file is each one of the files in result.
Do not use quotes around "file" — that is trying to read a file literally named "file". Use:
foreach file, result do read_rtlvis_v12, a, c, t, g, FILE=file, /CFILEONLY
I have a 5GB 1 liner file with JSON data and each line starts from this pattern "{"created". I need to be able to use Unix commands on my Mac to convert this monster of a 1 liner into as many lines as it deserves. Any commands?
ASCII English text, with very long lines, with no line terminators
If you have enough memory you can open the file once with the TextWrangler application (the free BBEdit cousin) and use regular search/replace on the whole file. Use \r in replace to add a return. Will be very slow at opening the file, may even hang if low on memory, but in the end it may probably work. No scripting, no commands,.. etc.. I did this with big SQL files and sometimes it did the job.
You have to replace your line-start string with the same string with \n or \r or \r\n in front of it.
Unclear how it can be a “one liner” file but then each line starts with "{"created", but perhaps python -mjson.tool can help you get started:
cat your_source_file.json | python -mjson.tool > nicely_formatted_file.json
Piping raw JSON through ``python -mjson.tool` will cleanly format the JSON to be more human readable. More info here.
OS X ships with both flex and bison, you can use those to write a parser for your data.
You can use PHP as a shell command (if PHP is installed), just save a text file with name "myscript" and appropriate code (I cannot test code now, but the idea is as follows)
UNTESTED CODE
#!/usr/bin/php
<?php
$REPLACE_STRING='{"created'; // anything you like
// open input file with fopen() in read mode
$inFp=fopen('big_in_file.txt', "r");
// open output file with fopen() in write mode
$outFp=fopen('big_out_file.txt', "w+");
// while not end of file
while (!feof($inFp)) {
// read file chunks here with fread() in variable $chunk
$chunk = fread($inFp, 8192);
// do a $chunk=str_replace($REPLACE_STRING,"\r".$REPLACE_STRING; // to add returns
// (or use \r\n for windows end of lines)
$chunk=str_replace($REPLACE_STRING,"\r".$REPLACE_STRING,$chunk);
// problem: if chunk contains half the string at the end
// easily solved if $REPLACE_STRING is a one char like '{'
// otherwise test for fist char { in the end of $chunk
// remove final part and save it in a var for nest iteration
// write $chunk to output file
fwrite($outFp, $chunk);
// End while
}
?>
After you save it you must make it executable whith sudo chmod a+x ./myscript
and then launch it as ./myscript in terminal
After this, the myscript file is a full unix command
I am writing a CGI script in Perl with a section of embedded R script which produces a graph. The original data filename is unknown as it has been uploaded by the CGI script and is stored in a Perl variable called $filename.
My question is that I now would like to open that file in R using read.table(). I am using Statistics::R and so I have tried:
my $R = Statistics::R->new();
$R->set('filename',$filename);
my $out1 = $R->run(
q`rm(list=ls())`,
# Fetch data
q`setwd("/var/www/uploads")`,
q`peakdata<-read.table(filename, sep="",col.names=c("mz","intensity","ionsscore","matched","query","index","hit"))`,
q`attach(peakdata)` ...etc
I can get this to work ONLY if I change $filename into something static and known like 'data.txt' before trying to open the file in read.table - is there a way for me to open a file with a variable for a name?
Thank you in advance.
One possible way to do this is by doing a little more work in Perl.
This is untested code, to give you some ideas:
my $filename = 'fileNameIGotFromSomewhere.txt'
my $source_dir = '/var/www/uploads';
my $file = "$source_dir/$fielname";
# make sure we can read it
unless ( -r $file ) {
die 'can read that data file: $!";
}
Then instead of $R->set, you could interpolate the file name into the R program. Where you've used the single-quote operator, use the double-quote operator instead:
So instead of:
q`peakdata<-read.table(filename, sep="",col.names= .... )`
Use:
qq`peakdata<-read.table($filename, sep="",col.names= .... )`
Now this looks like it would be inviting problems similar to SQL/Code Injections, so that's why I put int the logic to insure that the file exists and is readable. You might be able to think other checks to add to safeguard your use of user-supplied info.
I would like to determine real file extension.
example :
file = "test.fakeExt"
// but the real extention is .exe // for security reason I wish to avoid using it!
How can I do that?
If you want to determine the extension you could use findmimefromdata.
It looks at the first part of the file to determine what type of file it is.
FindMimeFromData function
Sample code
The first two bytes of an .exe file are allways 'MZ'.
So you could read the binary file, and see if the first two bytes are MZ, then you know it's an .exe file...