instiki/app/controllers/file_controller.rb

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# Controller responsible for serving files and pictures.
require 'zip/zip'
require 'stringsupport'
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class FileController < ApplicationController
layout 'default'
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before_filter :dnsbl_check, :check_authorized
before_filter :check_allow_uploads, :except => [:file, :blahtex_png]
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def file
@file_name = params['id']
if params['file']
return unless is_post and check_allow_uploads
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# form supplied
new_file = @web.wiki_files.create(params['file'])
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if new_file.valid?
flash[:info] = "File '#{@file_name}' successfully uploaded"
redirect_to(params['referring_page'])
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else
# pass the file with errors back into the form
@file = new_file
render
end
else
# no form supplied, this is a request to download the file
file = @web.files_path + '/' + @file_name
if File.exists?(file)
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send_file(file)
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else
return unless check_allow_uploads
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@file = WikiFile.new(:file_name => @file_name)
render
end
end
end
def blahtex_png
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send_file(@web.blahtex_pngs_path + '/' + params['id'])
end
def delete
@file_name = params['id']
file = WikiFile.find_by_file_name(@file_name)
unless file
flash[:error] = "File '#{@file_name}' not found."
redirect_to_page(@page_name)
end
system_password = params['system_password']
if system_password
return unless is_post
# form supplied
if wiki.authenticate(system_password)
file.destroy
flash[:info] = "File '#{@file_name}' deleted."
else
flash[:error] = "System Password incorrect."
end
redirect_to_page(@page_name)
else
# no system password supplied, display the form
end
end
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def cancel_upload
return_to_last_remembered
end
def import
if params['file']
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@problems = []
import_file_name = "#{@web.address}-import-#{Time.now.strftime('%Y-%m-%d-%H-%M-%S')}.zip"
import_from_archive(params['file'].path)
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if @problems.empty?
flash[:info] = 'Import successfully finished'
else
flash[:error] = 'Import finished, but some pages were not imported:<li>' +
@problems.join('</li><li>') + '</li>'
end
return_to_last_remembered
else
# to template
end
end
protected
def check_authorized
if authorized? or @web.published?
return true
else
@hide_navigation = true
render(:status => 403, :text => 'This web is private', :layout => true)
return false
end
end
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def check_allow_uploads
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render(:status => 404, :text => "Web #{params['web'].inspect} not found", :layout => 'error') and return false unless @web
if @web.allow_uploads? and authorized?
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return true
else
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@hide_navigation = true
render(:status => 403, :text => 'File uploads are blocked by the webmaster', :layout => true)
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return false
end
end
private
def is_post
unless (request.post? || ENV["RAILS_ENV"] == "test")
headers['Allow'] = 'POST'
render(:status => 405, :text => 'You must use an HTTP POST', :layout => 'error')
return false
end
return true
end
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def import_from_archive(archive)
logger.info "Importing pages from #{archive}"
zip = Zip::ZipInputStream.open(archive)
while (entry = zip.get_next_entry) do
ext_length = File.extname(entry.name).length
page_name = entry.name[0..-(ext_length + 1)]
page_content = entry.get_input_stream.read
logger.info "Processing page '#{page_name}'"
begin
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if !page_content.is_utf8?
logger.info "Page '#{page_name}' contains non-utf8 character data. Skipping."
next
end
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existing_page = @wiki.read_page(@web.address, page_name)
if existing_page
if existing_page.content == page_content
logger.info "Page '#{page_name}' with the same content already exists. Skipping."
next
else
logger.info "Page '#{page_name}' already exists. Adding a new revision to it."
wiki.revise_page(@web.address, page_name, page_name, page_content, Time.now, @author, PageRenderer.new)
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end
else
wiki.write_page(@web.address, page_name, page_content, Time.now, @author, PageRenderer.new)
end
rescue => e
logger.error(e)
@problems << "#{page_name} : #{e.message}"
end
end
logger.info "Import from #{archive} finished"
end
end