# Write code to read content from
# https://storage.googleapis.com/cs1111/examples/file/todo.csv
# then (print) display the file content on screen

# Be sure to read from the Internet,
# do not download the file to your computer


# import a library for opening URL
import urllib.request

# prepare URL to be opened
url = 'https://storage.googleapis.com/cs1111/examples/file/todo.csv'
# alternatively, we can specify the path and leave filename
# filename = 'todo.csv'
# url = 'https://storage.googleapis.com/cs1111/examples/file/' + filename


# let's look at the URL
print("url = " + url)

# open the specified URL to read
# store the response object received from the server in a variable
stream = urllib.request.urlopen(url)
print('stream =', stream)   # http.client.HTTPResponse object
print('type of stream =', type(stream))

# Tips:
# - Instead of "open()" when opening a file,
#   we use "urlopen()" when opening a url
# - Once opening a url, we must decode the data
#   -- unlike reading the file, we can simply read() or readline()

print("\n==== Start processing data ==== \n")

# read the entire stream, decode it, then print
# print(stream.read().decode('utf-8'))

# Alternatively, instead of reading the entire stream,
# we can get each line in the stream, then decode the line.

# Read each line from the response object
for line in stream:
    # decode the string using the standard encoding scheme (UTF-8)
    # then, strip leading and tailing spaces, and split the string using ","
    decoded_data = line.decode("UTF-8").strip()
    print(decoded_data)