diff options
Diffstat (limited to 'app/models/incoming_message.rb')
| -rw-r--r-- | app/models/incoming_message.rb | 158 |
1 files changed, 16 insertions, 142 deletions
diff --git a/app/models/incoming_message.rb b/app/models/incoming_message.rb index db6722976..658ee969a 100644 --- a/app/models/incoming_message.rb +++ b/app/models/incoming_message.rb @@ -52,17 +52,6 @@ class IncomingMessage < ActiveRecord::Base has_prominence - # See binary_mask_stuff function below. It just test for inclusion - # in this hash, not the value of the right hand side. - DoNotBinaryMask = { - 'image/tiff' => 1, - 'image/gif' => 1, - 'image/jpeg' => 1, - 'image/png' => 1, - 'image/bmp' => 1, - 'application/zip' => 1, - } - # Given that there are in theory many info request events, a convenience method for # getting the response event def response_event @@ -218,111 +207,10 @@ class IncomingMessage < ActiveRecord::Base end end - # Converts email addresses we know about into textual descriptions of them - def mask_special_emails!(text) - # TODO: can later display some of these special emails as actual emails, - # if they are public anyway. For now just be precautionary and only - # put in descriptions of them in square brackets. - if self.info_request.public_body.is_followupable? - text.gsub!(self.info_request.public_body.request_email, _("[{{public_body}} request email]", :public_body => self.info_request.public_body.short_or_long_name)) - end - text.gsub!(self.info_request.incoming_email, _('[FOI #{{request}} email]', :request => self.info_request.id.to_s) ) - text.gsub!(AlaveteliConfiguration::contact_email, _("[{{site_name}} contact email]", :site_name => AlaveteliConfiguration::site_name) ) - end - - # Replaces all email addresses in (possibly binary data) with equal length alternative ones. - # Also replaces censor items - def binary_mask_stuff!(text, content_type) - # See if content type is one that we mask - things like zip files and - # images may get broken if we try to. We err on the side of masking too - # much, as many unknown types will really be text. - if DoNotBinaryMask.include?(content_type) - return - end - - # Special cases for some content types - if content_type == 'application/pdf' - uncompressed_text = nil - uncompressed_text = AlaveteliExternalCommand.run("pdftk", "-", "output", "-", "uncompress", :stdin_string => text) - # if we managed to uncompress the PDF... - if !uncompressed_text.nil? && !uncompressed_text.empty? - # then censor stuff (making a copy so can compare again in a bit) - censored_uncompressed_text = uncompressed_text.dup - self._binary_mask_stuff_internal!(censored_uncompressed_text) - # if the censor rule removed something... - if censored_uncompressed_text != uncompressed_text - # then use the altered file (recompressed) - recompressed_text = nil - if AlaveteliConfiguration::use_ghostscript_compression == true - command = ["gs", "-sDEVICE=pdfwrite", "-dCompatibilityLevel=1.4", "-dPDFSETTINGS=/screen", "-dNOPAUSE", "-dQUIET", "-dBATCH", "-sOutputFile=-", "-"] - else - command = ["pdftk", "-", "output", "-", "compress"] - end - recompressed_text = AlaveteliExternalCommand.run(*(command + [{:stdin_string=>censored_uncompressed_text}])) - if recompressed_text.nil? || recompressed_text.empty? - # buggy versions of pdftk sometimes fail on - # compression, I don't see it's a disaster in - # these cases to save an uncompressed version? - recompressed_text = censored_uncompressed_text - logger.warn "Unable to compress PDF; problem with your pdftk version?" - end - if !recompressed_text.nil? && !recompressed_text.empty? - text.replace recompressed_text - end - end - end - return - end - - self._binary_mask_stuff_internal!(text) - end - - # Used by binary_mask_stuff - replace text in place - def _binary_mask_stuff_internal!(text) - # Keep original size, so can check haven't resized it - orig_size = text.mb_chars.size - - # Replace ASCII email addresses... - text.gsub!(MySociety::Validate.email_find_regexp) do |email| - email.gsub(/[^@.]/, 'x') - end - - # And replace UCS-2 ones (for Microsoft Office documents)... - # Find emails, by finding them in parts of text that have ASCII - # equivalents to the UCS-2 - ascii_chars = text.gsub(/\0/, "") - emails = ascii_chars.scan(MySociety::Validate.email_find_regexp) - - # Convert back to UCS-2, making a mask at the same time - if String.method_defined?(:encode) - emails.map! do |email| - # We want the ASCII representation of UCS-2 - [email[0].encode('UTF-16LE').force_encoding('US-ASCII'), - email[0].gsub(/[^@.]/, 'x').encode('UTF-16LE').force_encoding('US-ASCII')] - end - else - emails.map! {|email| [ - Iconv.conv('ucs-2le', 'ascii', email[0]), - Iconv.conv('ucs-2le', 'ascii', email[0].gsub(/[^@.]/, 'x')) - ] } - end - - # Now search and replace the UCS-2 email with the UCS-2 mask - for email, mask in emails - text.gsub!(email, mask) - end - - # Replace censor items - self.info_request.apply_censor_rules_to_binary!(text) - - raise "internal error in binary_mask_stuff" if text.mb_chars.size != orig_size - return text - end - - # Removes censored stuff from from HTML conversion of downloaded binaries - def html_mask_stuff!(html) - self.mask_special_emails!(html) - self.remove_privacy_sensitive_things!(html) + def apply_masks!(text, content_type) + mask_options = { :censor_rules => info_request.applicable_censor_rules, + :masks => info_request.masks } + AlaveteliTextMasker.apply_masks!(text, content_type, mask_options) end # Lotus notes quoting yeuch! @@ -346,26 +234,6 @@ class IncomingMessage < ActiveRecord::Base end - # Remove emails, mobile phones and other details FOI officers ask us to remove. - def remove_privacy_sensitive_things!(text) - # Remove any email addresses - we don't want bounce messages to leak out - # either the requestor's email address or the request's response email - # address out onto the internet - text.gsub!(MySociety::Validate.email_find_regexp, "[email address]") - - # Mobile phone numbers - # http://www.whatdotheyknow.com/request/failed_test_purchases_off_licenc#incoming-1013 - # http://www.whatdotheyknow.com/request/selective_licensing_statistics_i#incoming-550 - # http://www.whatdotheyknow.com/request/common_purpose_training_graduate#incoming-774 - text.gsub!(/(Mobile|Mob)([\s\/]*(Fax|Tel))*\s*:?[\s\d]*\d/, "[mobile number]") - - # Remove WhatDoTheyKnow signup links - text.gsub!(/http:\/\/#{AlaveteliConfiguration::domain}\/c\/[^\s]+/, "[WDTK login link]") - - # Remove things from censor rules - self.info_request.apply_censor_rules_to_text!(text) - end - # Remove quoted sections from emails (eventually the aim would be for this # to do as good a job as GMail does) TODO: bet it needs a proper parser @@ -465,9 +333,8 @@ class IncomingMessage < ActiveRecord::Base raise "main body text more than 1 MB, need to implement clipping like for attachment text, or there is some other MIME decoding problem or similar" end - # remove emails for privacy/anti-spam reasons - self.mask_special_emails!(text) - self.remove_privacy_sensitive_things!(text) + # apply masks for this message + apply_masks!(text, 'text/html') # Remove existing quoted sections folded_quoted_text = self.remove_lotus_quoting(text, 'FOLDED_QUOTED_SECTION') @@ -735,7 +602,14 @@ class IncomingMessage < ActiveRecord::Base text = MySociety::Format.simplify_angle_bracketed_urls(text) text = CGI.escapeHTML(text) text = MySociety::Format.make_clickable(text, :contract => 1) - text.gsub!(/\[(email address|mobile number)\]/, '[<a href="/help/officers#mobiles">\1</a>]') + + # add a helpful link to email addresses and mobile numbers removed + # by apply_masks! + email_pattern = Regexp.escape(_("email address")) + mobile_pattern = Regexp.escape(_("mobile number")) + text.gsub!(/\[(#{email_pattern}|#{mobile_pattern})\]/, + '[<a href="/help/officers#mobiles">\1</a>]') + if collapse_quoted_sections text = text.gsub(/(\s*FOLDED_QUOTED_SECTION\s*)+/m, "FOLDED_QUOTED_SECTION") text.strip! @@ -773,8 +647,8 @@ class IncomingMessage < ActiveRecord::Base # Returns text version of attachment text def get_attachment_text_full text = self._get_attachment_text_internal - self.mask_special_emails!(text) - self.remove_privacy_sensitive_things!(text) + apply_masks!(text, 'text/html') + # This can be useful for memory debugging #STDOUT.puts 'xxx '+ MySociety::DebugHelpers::allocated_string_size_around_gc |