Uploading file via HTTP using Ruby cgi-script
Obviously there is form (in upLoad.html) as shown below which resides at the client side, the browser, and transmits a file chosen by browse using POST/GET and invokes the script defined by action.
<form name="requestForm" enctype="multipart/form-data" action="cgi-bin/upLoadFile.rb"
method="POST">
<input type="FILE" name="upfile" value="browse">
<input type="SUBMIT" name="submit" value="submit">
</form>
The contents of the file upLoadFile.rb are as shown below, comments try to explain in more details. I am assuming you have a server like apache or sth installed and configured to run scripts.
#!D:\InstantRails\Ruby\bin\ruby.exe # line 1
# The above line mentions the path of the application to apache which can execute the script currently to be # spawned. It has to be mentioned in line 1 and unindented with #! directive at the beginning.
require "delegate" # some of the files to be included ....
require "tmpdir"
require "cgi"
BASE_DIR = "d:/InstantRails/www/uploads/" # directory where the uploaded files are saved.
cgi = CGI.new("html3") # creates a new session with the params or ENV already set
fObj = cgi.params["upfile"][0] # For the form specified above this is the specific variable that hold # the IO object from which we can simply read the contents of the file # uploaded.
fileName = BASE_DIR + fObj.original_filename # fObj is corresponds to multipart form specified above and # provides a few methods of which original_filename gives # the filename at the client side
File.open( fileName,"w"){|sf|
sf.puts fObj.read # fObj also has a read method which fetches the content of
} # uploaded file
# End of the JOB
# But give some response to the client that his file got uploaded in the server.
cgi.out {
CGI.pretty (
cgi.html {
cgi.head { cgi.title{"UPLOAD FILE"} } +
cgi.body {
cgi.h2{"UPLOADED FILE TO upload DIRECTORY" } +
cgi.a("/uploads"){"list contents of upload"} + cgi.br +
cgi.a("/upLoad.html"){"upload another file"} + cgi.br
}
}
) # CGI.pretty is a method call, not a block
}
Is not it simple?
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