Created
October 11, 2009 22:53
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require 'rack/utils' | |
require 'hpricot' | |
module Rack | |
class Codehighlighter | |
include Rack::Utils | |
# for logging use | |
FORMAT = %{%s - [%s] [%s] "%s %s%s %s" (%s) %d %d %0.4f\n} | |
def initialize(app, highlighter = :censor, opts = {}) | |
@app = app | |
@highlighter = highlighter | |
@opts = { | |
:element => "pre", | |
:pattern => /\A:::(\w+)\s*\n/, | |
:reason => "[[-- ugly code removed --]]", #8-) | |
:markdown => false | |
} | |
@opts.merge! opts | |
end | |
def call(env) | |
began_at = Time.now | |
status, headers, response = @app.call(env) | |
headers = HeaderHash.new(headers) | |
if !STATUS_WITH_NO_ENTITY_BODY.include?(status) && | |
!headers['transfer-encoding'] && | |
headers['content-type'] && | |
headers['content-type'].include?("text/html") | |
content = "" | |
response.each { |part| content += part } | |
doc = Hpricot(content) | |
nodes = doc.search(@opts[:element]) | |
nodes.each do |node| | |
s = node.inner_html || "[++where is the code?++]" | |
if @opts[:markdown] | |
node.parent.swap(send(@highlighter, s)) | |
else | |
node.swap(send(@highlighter, s)) | |
end | |
end | |
body = doc.to_html | |
headers['content-length'] = bytesize(body).to_s | |
log(env, status, headers, began_at) if @opts[:logging] | |
[status, headers, [body]] | |
else | |
[status, headers, response] | |
end | |
end | |
private | |
def log(env, status, headers, began_at) | |
# 127.0.0.1 - [ultraviolet] [10/Oct/2009 12:12:12] "GET /pastie HTTP/1.1" (text/html) 200 512 1.23 | |
now = Time.now | |
logger = env['rack.errors'] | |
logger.write FORMAT % [ | |
env['HTTP_X_FORWARDED_FOR'] || env["REMOTE_ADDR"] || "-", | |
@highlighter, | |
now.strftime("%d/%b/%Y %H:%M:%S"), | |
env["REQUEST_METHOD"], | |
env["PATH_INFO"], | |
env["QUERY_STRING"].empty? ? "" : "?"+env["QUERY_STRING"], | |
env["HTTP_VERSION"], | |
headers["content-type"] || "unknown", | |
status.to_s[0..3], | |
headers['content-length'], | |
now - began_at | |
] | |
end | |
# simplifies testing | |
def censor(string) | |
"<pre class='censor'>#{@opts[:reason]}</pre>" | |
end | |
def syntax(string) | |
# allow use html instead of xml | |
translate = { | |
'html' => 'xml' | |
} | |
lang = 'unknown' | |
refs = @opts[:pattern].match(string) # extract language name | |
if refs | |
lang = refs[1] | |
convertor = ::Syntax::Convertors::HTML.for_syntax translate[lang] | |
convertor.convert(unescape_html(string.sub(@opts[:pattern], "")) || "[=this can'n happen=]") | |
else | |
"<pre>#{string}</pre>" | |
end | |
end | |
def coderay(string) | |
lang = 'unknown' | |
refs = @opts[:pattern].match(string) # extract language name | |
if refs | |
lang = refs[1] | |
str = unescape_html(string.sub(@opts[:pattern], "")) | |
"<pre class='CodeRay'>#{::CodeRay.encoder(:html).encode str, lang}</pre>" | |
else | |
"<pre class='CodeRay'>#{string}</pre>" | |
end | |
end | |
def ultraviolet(string) | |
opts = { :theme => 'dawn', :lines => false } | |
opts.merge! @opts | |
lang = 'text' | |
refs = @opts[:pattern].match(string) # extract language name | |
if refs | |
lang = refs[1] | |
str = unescape_html(string.sub(@opts[:pattern], "")) | |
"#{::Uv.parse(str, 'xhtml', lang, opts[:lines], opts[:theme])}" | |
else | |
"<pre class='#{opts[:theme]}'>#{string}</pre>" | |
end | |
end | |
def unescape_html(string) | |
string.to_s.gsub("<", '<').gsub(">", '>').gsub("&", '&') | |
end | |
end | |
end |
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