all tasks

Task/Web-scraping/CoffeeScript/web-scraping-1.coffeescript

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+http = require 'http'
+
+CONFIG =
+  host: 'tycho.usno.navy.mil'
+  path: '/cgi-bin/timer.pl'
+
+# Web scraping code tends to be brittle, and this is no exception.
+# The tycho time page does not use highly structured markup, so
+# we do a real dirty scrape.
+scrape_tycho_ust_time = (text) ->
+  for line in text.split '\n'
+    matches = line.match /(.*:\d\d UTC)/
+    if matches
+      console.log matches[0].replace '<BR>', ''
+      return
+  throw Error("unscrapable page!")
+
+# This is low-level-ish code to get data from a URL. It's
+# pretty general purpose, so you'd normally tuck this away
+# in a library (or use somebody else's library).
+wget = (host, path, cb) ->
+  options =
+    host: host
+    path: path
+    headers:
+      "Cache-Control": "max-age=0"
+
+  req = http.request options, (res) ->
+    s = ''
+    res.on 'data', (chunk) ->
+      s += chunk
+    res.on 'end', ->
+      cb s
+  req.end()
+
+# Do our web scrape
+do ->
+  wget CONFIG.host, CONFIG.path, (data) ->
+    scrape_tycho_ust_time data

Task/Web-scraping/CoffeeScript/web-scraping-2.coffeescript

@@ -0,0 +1,2 @@
+> coffee web_scrape.coffee
+Jan. 09, 19:19:07 UTC