Writing encoded images to a file

ruby-talk
1

Word 2003 supports an xml output for documents that uses Base64 to
encode the embedded images. Im looking to grab that image out of the
xml and write it to a file. Im able to parse the xml and isolate the
Base64 string but decoding it out to a file hasn't been working for me;
the image doesn't come back looking correct. Stripped down version of
the code assuming 'AaBaCc' represents the really long Base64 encoded GIF
image string:

require 'base64'
str = 'AaBbCc'
file = File.new("/test.gif", "w")
file.syswrite(Base64.decode64(str))

Could be the string coming in, but wanted to get an idea if Im headed in
the right direction with the output before I tackle that debug
nightmare.

···

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Posted via http://www.ruby-forum.com/.

2

Assuming you're on Windows, you'll probably want "wb" rather than just
"w" for the file mode. Also, I'd do this:

File.open("/test.gif", "wb") do |file|
  file << Base64.decode64(str)
end

to make sure the file gets closed.

···

On Sun, 2006-06-04 at 21:25 +0900, Aaron Worsham wrote:

Word 2003 supports an xml output for documents that uses Base64 to
encode the embedded images. Im looking to grab that image out of the
xml and write it to a file. Im able to parse the xml and isolate the
Base64 string but decoding it out to a file hasn't been working for me;
the image doesn't come back looking correct. Stripped down version of
the code assuming 'AaBaCc' represents the really long Base64 encoded GIF
image string:

require 'base64'
str = 'AaBbCc'
file = File.new("/test.gif", "w")
file.syswrite(Base64.decode64(str))

--
Ross Bamford - rosco@roscopeco.REMOVE.co.uk

3

You could try change:
file = File.new("/test.gif", "w")
to
file = File.new("/test.gif", "wb")
So that its in binary mode.

j`ey
http://www.eachmapinject.com

c,y=(r,p,s=%w(rock paper scissors))[rand 3];d={s,
{p,0,r,1},p,{r,1,s,0},r,{s,1,p,0}};until y=~/(#{r
}|#{s}|#{p})/;$><<"#{[r,s]*", "} #{["or",p]*" "}?
";y=gets.chomp;end;$><<"You:#{y}\nComp:#{c}\n";$>\
<<"You #{d[y][c]?(d[y][c]>0?"Win":"Lose"):"Draw"}\n"

···

On 6/4/06, Aaron Worsham <aaronw@dynalinkweb.com> wrote:

Word 2003 supports an xml output for documents that uses Base64 to
encode the embedded images. Im looking to grab that image out of the
xml and write it to a file. Im able to parse the xml and isolate the
Base64 string but decoding it out to a file hasn't been working for me;
the image doesn't come back looking correct. Stripped down version of
the code assuming 'AaBaCc' represents the really long Base64 encoded GIF
image string:

require 'base64'
str = 'AaBbCc'
file = File.new("/test.gif", "w")
file.syswrite(Base64.decode64(str))

Could be the string coming in, but wanted to get an idea if Im headed in
the right direction with the output before I tackle that debug
nightmare.

--
Posted via http://www.ruby-forum.com/\.

4

Ross Bamford wrote:

···

On Sun, 2006-06-04 at 21:25 +0900, Aaron Worsham wrote:

str = 'AaBbCc'
file = File.new("/test.gif", "w")
file.syswrite(Base64.decode64(str))

Assuming you're on Windows, you'll probably want "wb" rather than just
"w" for the file mode. Also, I'd do this:

File.open("/test.gif", "wb") do |file|
  file << Base64.decode64(str)
end

to make sure the file gets closed.

That worked. Thank you very much.

--
Posted via http://www.ruby-forum.com/\.