From: Matthew Margolis <mrmargolis@...>
Date: 2005-01-26T05:44:20+09:00
Subject: Re: ruby cgi and forms question

Ok that worked.  Now my problem is just getting the uploaded image into 
a file.  I am trying to do

uploadImage = cgi['upload']
if uploadImage
  ucomments = cgi.params['uploadcomment']
  ucomments.each {|com| com.gsub!(" ", "_")}
  image = File.new("#{ucomments}.jpg", "w+")
  image << uploadImage
  image.close
end

But I always end up with a 0 length .jpg though it is named right.  
cgi['upload'] is StringIO.

-Matthew Margolis


Belorion wrote:

>If I recall correctly, multi-part form data comes as type StringIO,
>not String.  Check out
>http://www.ruby-doc.org/stdlib/libdoc/stringio/rdoc/ for RDoc
>documentation on StringIO.  You can probably get the string by
>StringIO.read.
>
>require 'stringio'
>a = StringIO.new( "foo")
>a.read
>
>will give "foo"
>
>
>On Wed, 26 Jan 2005 02:55:14 +0900, MATTHEW REUBEN MARGOLIS
><mrmargolis@wisc.edu> wrote:
>  
>
>>I have a form that contains both text fields and a file field for
>>uploading.  The form is set to post to a ruby script on my server.  The
>>script works(excluding file  uploading) when I delete
>>ENCTYPE="multipart/form-data" from the form tag but if that is
>>present(and it needs to be for the image upload to work) then ruby cgi
>>chokes on a gsub for one of my text field parameters called comment.
>>
>>imageadmin.rb:14: private method `gsub!' called for
>>#<StringIO:0x20221278> (NoMethodError)
>>
>>Anyone have some ideas for how I can make this work?
>>
>>Here is the form code (it is from an eruby file)
>>-----------------------------------------------------
>>% imageArray = Dir.glob("*.jpg").sort!
>>% commentArray = imageArray.collect {|image| image[4..-5]}
>>% commentArray.collect {|image| image.gsub!("_", " ")}
>>
>><FORM  ENCTYPE="multipart/form-data" action="imageadmin.rb" method="post">
>><%imageArray.length.times do |count|%>
>>  <img src="<%=imageArray[count]%>">
>>  <BR />
>>  Comment:<input type="text" name="comment"
>>value="<%=commentArray[count]%>">
>>  <BR />
>>  Number:<input type="text" name="order"
>>value="<%=imageArray[count][0..2] %>">
>>  <BR />
>>  Delete:<input type="checkbox" name="delete"
>>value="<%=imageArray[count]%>">
>>  <BR />
>><%end%>
>><BR />
>><BR />
>><input type="file" value="upload">
>>Comment:<input type="text" name="uploadcomment" value="">
>>
>><BR />
>><input type="submit" value="Submit">
>></FORM>
>>-----------------------------------------------------------------
>>
>>And here is the script itself.  I apologize for the lack of comments and
>>that it isn't as short as it could be.  I am going to clean it up tonight.
>>-----------------------------------------------------------------------
>>#!/usr/bin/env ruby
>>$stderr = File.open("error.log", "w+")
>>print "Content-type: text/html\n\n"
>>require 'cgi'
>>cgi = CGI.new
>>
>>deleteArray = cgi.params['delete']
>>imageArray = Dir.glob("*.jpg").sort!
>>oldArray = Dir.glob("*.jpg").sort!
>>commentArray = cgi.params['comment']
>>
>>#####Here is where I get the error#####
>>commentArray.each {|com| com.gsub!(" ", "_")}
>>numberArray = cgi.params['order']
>>
>>count = imageArray.length
>>
>>count.times do |x|
>>  imageArray[x].sub!(/^\d\d\d/, numberArray[x])
>>end
>>
>>count.times do |x|
>>  imageArray[x] = numberArray[x] + "_" + commentArray[x] + ".jpg"
>>end
>>
>>count.times do |x|
>>  File.rename(oldArray[x], imageArray[x])
>>end
>>
>>#uploadImage = cgi['upload']
>>#if uploadImage
>>#  ucomments = cgi.params['uploadcomment']
>>#  ucomments.each {|com| com.gsub!(" ", "_")}
>>#  image = File.new("#{ucomments}.jpg", "w+")
>>#  image << uploadImage
>>#  image.close
>>#end
>>
>>for thing in deleteArray
>>  File.delete(thing)
>>end
>>
>>print "<meta  HTTP-EQUIV=\"REFRESH\" content=\"0; url=admin.rhtml\">"
>>
>>-------------------------------------------------------------------
>>
>>Thank you,
>>Matthew Margolis
>>
>>
>>    
>>
>
>  
>