disable google clicktracking for search, add gunzipping for that

injections/google-noclicktrack.coffee

@@ -0,0 +1,5 @@
+{
+  urlregex: /www\.google\.de\/search/
+  search: ' onmousedown="return'
+  append: ';'
+}

proxy.coffee

@@ -3,6 +3,7 @@ coffee = require 'coffee-script'
 async = require 'async'
 fs = require 'fs'
 http = require 'http'
+{createGunzip} = require 'zlib'
 {checkURL} = require './urlcheck'
 {InsertingStream} = require './streaminsert'
 
@@ -46,17 +47,31 @@ server_cb = (request, response) ->
   proxy_request.on 'error', (err) ->
     denyRequest response, err+'', 404
   proxy_request.addListener 'response', (proxy_response) ->
-    writeToClient = (chunk) -> response.write chunk
+    writeToClient = (chunk) ->
+      return response.end() if chunk is null
+      response.write chunk
     console.error "request for '#{fullurl}'"
     #console.error "  HEADERS: #{JSON.stringify request.headers}"
-    if not proxy_response.headers["content-type"]?.indexOf("text/")
+    if proxy_response.headers["content-type"]?.indexOf("text/") is 0 or proxy_response.headers["content-type"]?.indexOf("javascript") isnt -1
       for injection in injections when ~fullurl.search injection.urlregex
         writeToClient = do (writeToClient) ->
           inserter = new InsertingStream injection.search, injection.append, writeToClient
-          (chunk) -> inserter.write chunk
+          (chunk) ->
+            return writeToClient null if chunk is null
+            inserter.write chunk
         console.error "  bugging '#{fullurl}'"
+      if proxy_response.headers['content-encoding'] is 'gzip'
+        console.error "  unzipping"
+        delete proxy_response.headers['content-encoding']
+        writeToClient = do (writeToClient) ->
+          unzipper = createGunzip()
+          unzipper.on 'data', writeToClient
+          unzipper.on 'end', -> writeToClient null
+          (chunk) ->
+            return unzipper.end() if chunk is null
+            unzipper.write chunk
     proxy_response.addListener 'data', writeToClient
-    proxy_response.addListener 'end', -> response.end()
+    proxy_response.addListener 'end', -> writeToClient null
     delete proxy_response.headers['content-length']
     delete proxy_response.headers['content-range']
     response.writeHead proxy_response.statusCode, proxy_response.headers