Merge pull request #190 from qasema/addfile

Addfile

Author: bnmnetp

_sources/Files/FetchingSomethingFromTheWeb.rst

@@ -0,0 +1,43 @@
+..  Copyright (C)  Brad Miller, David Ranum, Jeffrey Elkner, Peter Wentworth, Allen B. Downey, Chris
+    Meyers, and Dario Mitchell.  Permission is granted to copy, distribute
+    and/or modify this document under the terms of the GNU Free Documentation
+    License, Version 1.3 or any later version published by the Free Software
+    Foundation; with Invariant Sections being Forward, Prefaces, and
+    Contributor List, no Front-Cover Texts, and no Back-Cover Texts.  A copy of
+    the license is included in the section entitled "GNU Free Documentation
+    License".
+
+.. qnum::
+   :prefix: file-1-
+   :start: 1
+
+Fetching Something From The Web
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The Python libraries are pretty messy in places. But here is a very simple example that copies 
+the contents at some web URL to a local file. We will need to get a few things right before this works:
+
+* The resource we’re trying to fetch must exist! Check this using a browser.
+* We’ll need permission to write to the destination filename, and the file will be created in the “current directory” - i.e. the same folder that the Python program is saved in.
+* If we are behind a proxy server that requires authentication, (as some students are), this may require some more special handling to work around our proxy. Use a local resource for the purpose of this demonstration!
+
+We will try to retrieve the content of the HTML of this page as in the following code.
+
+
+.. activecode:: ch11_1
+
+    import urllib.request
+
+    def retrieve_page(url):
+        """ Retrieve the contents of a web page.
+        """
+        my_socket = urllib.request.urlopen(url)
+        dta = my_socket.read()
+        return dta
+
+    the_text = retrieve_page("https://runestone.academy/runestone/books/published/thinkcspy/Files/FetchingSomethingFromTheWeb.html")
+    print(the_text)
+
+
+
+