Step 1: Verifying Details
require 'rubygems'
require 'oauth'

# Change the following values to those provided on dev.twitter.com
# The consumer key identifies the application making the request.
# The access token identifies the user making the request.
consumer_key = OAuth::Consumer.new(
    "YOUR_CONSUMER_KEY",
    "YOUR_CONSUMER_SECRET")
access_token = OAuth::Token.new(
    "YOUR_ACCESS_TOKEN",
    "YOUR_ACCESS_SECRET")

# All requests will be sent to this server.
baseurl = "https://api.twitter.com"

# The verify credentials endpoint returns a 200 status if
# the request is signed correctly.
address = URI("#{baseurl}/1.1/account/verify_credentials.json")

# Set up Net::HTTP to use SSL, which is required by Twitter.
http = Net::HTTP.new address.host, address.port
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_PEER

# Build the request and authorize it with OAuth.
request = Net::HTTP::Get.new address.request_uri
request.oauth! http, consumer_key, access_token

# Issue the request and return the response.
http.start
response = http.request request
puts "The response status was #{response.code}"

Step 2 : Parsing a User Object

require 'rubygems'
require 'oauth'

# Parse a response from the API and return a user object.
def parse_user_response(response)
  user = nil

  # Check for a successful request
  if response.code == '200'
    # Parse the response body, which is in JSON format.
    # ADD CODE TO PARSE THE RESPONSE BODY HERE
    user =

    # Pretty-print the user object to see what data is available.
    puts "Hello, #{user["screen_name"]}!"
  else
    # There was an error issuing the request.
    puts "Expected a response of 200 but got #{response.code} instead"
  end

  user
end

# All requests will be sent to this server.
baseurl = "https://api.twitter.com"

# Verify credentials returns the current user in the body of the response.
address = URI("#{baseurl}/1.1/account/verify_credentials.json")

# Set up HTTP.
http             = Net::HTTP.new address.host, address.port
http.use_ssl     = true
http.verify_mode = OpenSSL::SSL::VERIFY_PEER

# If you entered your credentials in the previous
# exercise, no need to enter them again here. The
# ||= operator will only assign these values if
# they are not already set.
consumer_key ||= OAuth::Consumer.new "ENTER IN EXERCISE 1", ""
access_token ||= OAuth::Token.new "ENTER IN EXERCISE 1", ""

# Issue the request.
request = Net::HTTP::Get.new address.request_uri
request.oauth! http, consumer_key, access_token
http.start
response = http.request(request)
user = parse_user_response(response)

Step 3: Reading a tweet

require 'rubygems'
require 'oauth'
require 'json'

# Now you will fetch /1.1/statuses/show.json, which
# takes an 'id' parameter and returns the
# representation of a single Tweet.
baseurl = "https://api.twitter.com"
path    = "/1.1/statuses/show.json"
query   = URI.encode_www_form("id" => "TWEET ID GOES HERE")
address = URI("#{baseurl}#{path}?#{query}")
request = Net::HTTP::Get.new address.request_uri

# Print data about a Tweet
def print_tweet(tweet)
  # ADD CODE TO PRINT THE TWEET IN "<screen name> - <text>" FORMAT
end

# Set up HTTP.
http             = Net::HTTP.new address.host, address.port
http.use_ssl     = true
http.verify_mode = OpenSSL::SSL::VERIFY_PEER

# If you entered your credentials in the first
# exercise, no need to enter them again here. The
# ||= operator will only assign these values if
# they are not already set.
consumer_key ||= OAuth::Consumer.new "ENTER IN EXERCISE 1", ""
access_token ||= OAuth::Token.new "ENTER IN EXERCISE 1", ""

# Issue the request.
request.oauth! http, consumer_key, access_token
http.start
response = http.request request

# Parse and print the Tweet if the response code was 200
tweet = nil
if response.code == '200' then
  tweet = JSON.parse(response.body)
  print_tweet(tweet)
end

Step 4: Reading a timeline

require 'rubygems'
require 'oauth'
require 'json'

# Now you will fetch /1.1/statuses/user_timeline.json,
# returns a list of public Tweets from the specified
# account.
baseurl = "https://api.twitter.com"
path    = "/1.1/statuses/user_timeline.json"
query   = URI.encode_www_form(
    "screen_name" => "twitterapi",
    "count" => 5,
)
address = URI("#{baseurl}#{path}?#{query}")
request = Net::HTTP::Get.new address.request_uri

# Print data about a list of Tweets
def print_timeline(tweets)
  # ADD CODE TO ITERATE THROUGH EACH TWEET AND PRINT ITS TEXT

end

# Set up HTTP.
http             = Net::HTTP.new address.host, address.port
http.use_ssl     = true
http.verify_mode = OpenSSL::SSL::VERIFY_PEER

# If you entered your credentials in the first
# exercise, no need to enter them again here. The
# ||= operator will only assign these values if
# they are not already set.
consumer_key ||= OAuth::Consumer.new "ENTER IN EXERCISE 1", ""
access_token ||= OAuth::Token.new "ENTER IN EXERCISE 1", ""

# Issue the request.
request.oauth! http, consumer_key, access_token
http.start
response = http.request request

# Parse and print the Tweet if the response code was 200
tweets = nil
if response.code == '200' then
  tweets = JSON.parse(response.body)
  print_timeline(tweets)
end
nil

Step 5 : Sending a tweet

require 'rubygems'
require 'oauth'
require 'json'

# You will need to set your application type to
# read/write on dev.twitter.com and regenerate your access
# token.  Enter the new values here:
consumer_key = OAuth::Consumer.new(
  "READ/WRITE CONSUMER KEY",
  "READ/WRITE CONSUMER SECRET")
access_token = OAuth::Token.new(
  "READ/WRITE ACCESS TOKEN",
  "READ/WRITE ACCESS SECRET")

# Note that the type of request has changed to POST.
# The request parameters have also moved to the body
# of the request instead of being put in the URL.
baseurl = "https://api.twitter.com"
path    = "/1.1/statuses/update.json"
address = URI("#{baseurl}#{path}")
request = Net::HTTP::Post.new address.request_uri
request.set_form_data(
  "status" => "",
)

# Set up HTTP.
http             = Net::HTTP.new address.host, address.port
http.use_ssl     = true
http.verify_mode = OpenSSL::SSL::VERIFY_PEER

# Issue the request.
request.oauth! http, consumer_key, access_token
http.start
response = http.request request

# Parse and print the Tweet if the response code was 200
tweet = nil
if response.code == '200' then
  tweet = JSON.parse(response.body)
  puts "Successfully sent #{tweet["text"]}"
else
  puts "Could not send the Tweet! " +
  "Code:#{response.code} Body:#{response.body}"
end