From 84efd174e1c5e60bb9b0b7cac84e63932a43a7f8 Mon Sep 17 00:00:00 2001
From: Muthiah Annamalai <ezhillang@gmail.com>
Date: Sun, 27 Dec 2015 12:24:31 -0500
Subject: [PATCH] 1) Add URL Library hooks to Ezhil - readonly - 2) Partial
 resolution of issue #163
 https://github.com/arcturusannamalai/Ezhil-Lang/issues/163; 3) Added unittest
 4) update dir() to be called only on non-windows platforms

---
 ezhil/Interpreter.py   |  7 +++++--
 ezhil/ezhil_library.py | 35 +++++++++++++++++++++++++++++++++++
 test_cases             |  1 +
 tests/fact.n           |  5 ++++-
 tests/urldemo.n        | 23 +++++++++++++++++++++++
 5 files changed, 68 insertions(+), 3 deletions(-)
 create mode 100644 ezhil/ezhil_library.py
 create mode 100644 tests/urldemo.n

diff --git a/ezhil/Interpreter.py b/ezhil/Interpreter.py
index c0412d9..abf2bea 100644
--- a/ezhil/Interpreter.py
+++ b/ezhil/Interpreter.py
@@ -2,8 +2,6 @@
 ## (C) 2007, 2008, 2013, 2014, 2015 Muthiah Annamalai,
 ## Licensed under GPL Version 3
 ##
-## 
-## TODO: extract scanner and AST members into a module for sharing.
 from __future__ import print_function
 
 import argparse
@@ -57,6 +55,7 @@
  TransformSemanticAnalyzer, TransformConstantFolder
 
 from ezhil_serializer import SerializerXML
+from ezhil_library import Load_URL_APIs
  
 def ezhil_version():
         return 0.8
@@ -712,6 +711,10 @@ def install_builtins(self):
         
         self.builtin_map["update"]= BuiltinFunction(dict.update,"update",1)
         
+        # URL API's - load except in safe mode
+        if not self.SAFE_MODE:
+            Load_URL_APIs( self )
+        
         # open-tamil API
         # get tamil letters
         self.add_builtin("get_tamil_letters",tamil.utf8.get_letters,nargin=1,ta_alias=u"தமிழ்_எழுத்துக்கள்")
diff --git a/ezhil/ezhil_library.py b/ezhil/ezhil_library.py
new file mode 100644
index 0000000..69e5fb3
--- /dev/null
+++ b/ezhil/ezhil_library.py
@@ -0,0 +1,35 @@
+## -*- coding: utf-8 -*-
+## (C) 2007, 2008, 2013, 2014, 2015 Muthiah Annamalai,
+## Licensed under GPL Version 3
+##
+from __future__ import print_function
+import sys
+from runtime import BuiltinFunction
+
+PYTHON3 = (sys.version[0] == '3')
+
+if PYTHON3:
+    # For Python 3.0 and later
+    from urllib.request import urlopen
+else:
+    # Fall back to Python 2's urllib2
+    from urllib2 import urlopen
+
+def ezhil_urlopen(*args):
+    html = urlopen(*args)
+    return html
+
+def ezhil_urlread(html):
+    data = html.read()
+    if not PYTHON3:
+        return data.decode("utf-8")
+    return data
+
+def ezhil_urlclose(html):
+    html.close()
+
+def Load_URL_APIs(interpreter):
+    interpreter.add_builtin("urlopen",ezhil_urlopen,nargin=1,ta_alias="இணைய_இணைப்பு_திற")
+    interpreter.add_builtin("urlread",ezhil_urlread,nargin=1,ta_alias="இணைய_இணைப்பு_படி")
+    interpreter.add_builtin("urlclose",ezhil_urlclose,nargin=1,ta_alias="இணைய_இணைப்பு_மூடு")
+    
\ No newline at end of file
diff --git a/test_cases b/test_cases
index 192efde..90367b3 100644
--- a/test_cases
+++ b/test_cases
@@ -123,3 +123,4 @@ partition_estimate.n
 envchecks.n
 ifparse.n
 foo.n
+urldemo.n
\ No newline at end of file
diff --git a/tests/fact.n b/tests/fact.n
index f67039b..52f3695 100644
--- a/tests/fact.n
+++ b/tests/fact.n
@@ -13,7 +13,10 @@
 ans = fact ( ப + 4 )
 பதிப்பி assert( ans == (1*2*3*4*5*6*7*8) )
 profile("begin")
-dir("fa") #list all ezhil builtin and user defined functions starting with 'fa'
+
+@( sys_platform() != "win32") ஆனால்
+    dir("fa") #list all ezhil builtin and user defined functions starting with 'fa'
+முடி
 
 ans = fact ( ப - 4/2 )
 பதிப்பி ans, assert( ans == 2 )
diff --git a/tests/urldemo.n b/tests/urldemo.n
new file mode 100644
index 0000000..672f976
--- /dev/null
+++ b/tests/urldemo.n
@@ -0,0 +1,23 @@
+# (C) 2015, Ezhil Language Project
+# (C) 2015 முத்தையா அண்ணாமலை 
+# இது ஒரு எழில் தமிழ் நிரலாக்க மொழி உதாரணம்
+
+# Networking Example:
+# இங்கு 'urllib' Python library functions Ezhil language வழியாக 
+# பயன் படுத்துமாறு நிரல் எ.கா உள்ளது
+
+இணைய_முகவரி = "http://www.bing.com" 
+பிங்_தொடர்பு = urlopen( இணைய_முகவரி )
+அடங்கல் = urlread( பிங்_தொடர்பு )
+
+@( sys_platform() != "win32") ஆனால்
+    பதிப்பி "பிங்_தொடர்பு அடங்கல் => கீழே"
+    பதிப்பி  அடங்கல்
+இல்லை
+   பதிப்பி "Test does not print on Windows"
+முடி
+
+பதிப்பி "Size of contents = ",len(அடங்கல்)
+
+urlclose( பிங்_தொடர்பு )
+exit(0)