修复文件预览bug

app/controllers/attachments_controller.rb

@@ -71,7 +71,7 @@ class AttachmentsController < ApplicationController
       if stale?(:etag => @attachment.digest)
         convered_file = File.join(Rails.root, "files", "convered_office", @attachment.disk_filename + ".html")
         if File.exist?(convered_file)
-          render :text => File.open(convered_file).read
+          send_file convered_file,  :type => 'text/html; charset=utf-8', :disposition => 'inline'
         else
           send_file @attachment.diskfile, :filename => filename_for_content_disposition(@attachment.filename),
             :type => detect_content_type(@attachment),

lib/trustie/utils/office.rb

@@ -21,7 +21,7 @@ module Trustie
                   :open_timeout => -1
                 )
                 req = resource.post :txtDes => File.new(@file, 'rb')
-                File.new(saved_file, "ab+") do |f|
+                File.open(saved_file, "wb+") do |f|
                   f.write(req.body)
                 end
                 return true