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scripts/devSetup/downloader.py

@@ -0,0 +1,36 @@
+__author__ = 'schmatz'
+from configuration import Configuration
+import urllib
+from dependency import Dependency
+class Downloader:
+    def __init__(self,dependency):
+        assert isinstance(dependency, Dependency)
+        self.dependency = dependency
+    @property
+    def download_directory(self):
+        raise NotImplementedError
+    def download(self):
+        raise NotImplementedError
+    def download_file(self,url,filePath):
+        urllib.urlretrieve(url,filePath,self.__progress_bar_reporthook)
+    def decompress(self):
+        raise NotImplementedError
+    def check_download(self):
+        raise NotImplementedError
+
+    def __progress_bar_reporthook(self,blocknum,blocksize,totalsize):
+        #http://stackoverflow.com/a/13895723/1928667
+        #http://stackoverflow.com/a/3173331/1928667
+        bars_to_display = 70
+        amount_of_data_downloaded_so_far = blocknum * blocksize
+        if totalsize > 0:
+            progress_fraction = float(amount_of_data_downloaded_so_far) / float(totalsize)
+            progress_percentage = progress_fraction * 1e2
+            stringToDisplay = '\r[{0}] {1:.1f}%'.format('#'*int(bars_to_display*progress_fraction),progress_percentage)
+            print stringToDisplay,
+            if amount_of_data_downloaded_so_far >= totalsize:
+                print "\n",
+        else:
+            stringToDisplay = '\r File size unknown. Read {0} bytes.'.format(amount_of_data_downloaded_so_far)
+            print stringToDisplay,
+