I want to post a file to an API, and I need to post the binary data, not the text.
How can I do that?
I'm reading the text of the file like this:
Paperclip.io_adapters.for(jobfile).read
but I need the binary data of the file instead of the text.
Replace file.ext with the name of the file you want to read from.
file = File.binread("file.ext")
bits = file.unpack("B*")[0]
puts bits
=> 0101111101011011100011100001
Related
I am receiving a text file from a socket over TCP/IP. There is no file extension (or filename for that matter) as the data is received as bytes. I can take the data from this (in the form of NSData) and load it into a UITextView and display it fine.
I want to persist this data to a file. However, I don't know what format the data is in (txt, rtf, doc, docx)? I assume it as .txt and save it in the documents directory, but is there a programmatic way of finding out for sure? I've looked around StackOverflow and at the documentation and haven't been able to find anything.
And is there a way to get the details of the file attributes like the file creation date.
Thanks in advance.
When you send a file over a TCP/IP connection, only the file contents will be converted to data and be passed across. If you want the filename,extension and the file attributes, then you will have to add those details separately and append it with the data to be sent. Then you can parse it at the receiver end and use the results inside your app.
You can choose the file type you want when you save the data, you can get attributes from file,please refer to Get file creation date.
I have RTF files containing that sort of content:
long_text_description_1 number1a number1b number1c
long_text_description_2 number2a number2b number2c
long_text_description_3 number3c
long_text_description_4 number4a number4b number4c
…
I need to extract the plain raw text without the colours, fonts and other formatting thing.
The only thing I need to keep are the most basic row/column information, ideally I would like a CSV file.
The file I get contain all the formatting:
{\cs18\lang1033\langfe1033\f0\b\i0\ul0\strike0\scaps0\fs15\afs15\charscalex100\expndtw0\cf1\dn0 number1a}
What is the best way to remove all rtf information while only keeping the row information?
Trying to figure out myself many many regular expressions sound dangerous unless there is a complete understanding of the RTF format.
What I could find on the Internet mostly focused on using Windows languages & libraries unavailable in iOS.
All rtf tags are in the form \xxx.
Try using a regular expression like "\\S+" and remove all matches or replace with nothing.
For your example, you'll end up with { number1a} This will remove any backslash followed by any characters.
My application accepts an uploaded file from the user and parses it, making use of seek and rewind methods quite heavily to parse blocks from the file (lines can begin with 'start' or 'end' to enclose a section of data, etc).
A new requirement allows the user to upload encrypted files. I've implemented decryption of the content of the file and return the content string to the existing method. I can parse the string as a CSV but lose the file controls.
Storing an unencrypted version of the file is not an option for business reasons.
I'm using FasterCSV but not averse to using something else if I can keep the seek/rewind behaviour.
Current code:
FasterCSV.open(path, 'rb') do |csv| # Can I open a string as if it were a file?
unless csv.eof? # Catch empty files
# Read, store position, seek, rewind all used during parsing
position = csv.pos
row = csv.readline
csv.seek(pos)
After some digging and experimentation I've found that it was possible to retain the IO methods by using the StringIO class like so:
csv = StringIO.new(decrypted_content)
unless csv.nil?
unless csv.eof? # Catch empty files
position = csv.pos
row = csv.readline.chomp.split(',')
csv.seek(pos)
Only change is needing to manually split the line to be able to use it like a csv row, not much extra work.
You don't need the CSV gem anymore but if you prefer the seek/rewind behaviour you can roll your own for strings. Something like this might work for your scenario:
array_of_lines=unecrypted_file_string.split('\n')
array_of_lines.each_with_index do |line,index|
position=index
row=line
seek=line[10]
end
When i backup my blackberry using blackberry desktop mananger, it saves it as an .ipd file.
its in hex... Not sure if its any particular type. But i used software called ABC amber Text Converter to convert this .ipd file into plain text format. And some of it comes out as plain text, Like all the messages saved in the backup file. But some of the text in the file looks like this:
qÖ²u_+;¢õ¿B[[¤†D`Ø,>p
|Cñ:ÌQ†nÁä¼sÒ®sKDv©{(]
)++³É«.gsn>
z
'‚51o4Kq
8Ütâ¯cí¿þ2´Õ|5kl$S,H
dbiIjz
*!~k$|
&*OÝ>0ðîwã
+zno%q
2k;
YnÁÅŸ5|Xñ7Ú<}y2
A
V܉lO5‰<œtÅRI-I
Does anybody have any idea What the hell this is or if there is Any way i can decode this?
Thanks
It's just binary data. You may have been able to extract some text from the file where strings of text were stored, but the rest will be just bytes of data.
You'll need a specific program that understands these backup files. A quick google reveals a few choices, such as MagicBerry.
One of the Blackberry developers has helpfully blogged a bit of information about the binary format, so you could try using that to write your own program to parse it:
http://us.blackberry.com/devjournals/resources/journals/jan_2006/ipd_file_format.jsp
In my Rails application Admin can export the user data into csv format. Every user in my application has their profile photo.... my client wants to include the user photo into the CSV file .. I have not how to do this . can any one please help me....
i am using fastercsv gem and here is some my controller code for reference
In my Controller :
require 'fastercsv'
def getcsv
entries = User.find(:all)
csv_string = FasterCSV.generate do |csv|
csv << ["first_name","last_name","username","address","photo" ]
entries.each do |e|
csv << [e.first_name,e.last_name,e.username,e.address,e.photo.url]
end
end
send_data csv_string,:type=>'text/csv;charset=iso-8859-1; header=present', :filename=>"entries.csv",:disposition => 'attachment'
end
Saving the actual photo in a CSV file is technically possible, but very ill-advised. CSV is simply not intended for that sort of job. You obviously cannot simply embed the binary image data into the ASCII text-based CSV file. It would be possible to use Base-64 encoding to convert the 8-bit binary data into 7-bit text, and then store this in one of the fields in your CSV file. (This will also expand the storage required by about 20%).
But then what software could decode this? You would have to write some other software to convert the images back on the other end, which would defeat the purpose. Furthermore, each line of the CSV file would be massive, and probably cause problems on importing.
You would be much better off exporting the profile photos as a set of PNGs, and save the filename in the CSV file against each record.
CSV is plain text. There's no way to include graphic data unless both the generator and the reader agree on a format, such as base64-encoded PNG.
You could try adding
links to image files
single line base64 encoded string
CSV (comma separated values) is not a format suitable for binary data, the general rule of thumb though for saving binary data to a text file is to convert it to a format that does suit text files, something like Base64, or a textual representation of the raw data in Hex.