Class: HTTPClient::ProxyAuth

Inherits:
AuthFilterBase show all
Defined in:
lib/httpclient/auth.rb

Overview

Authentication filter for handling authentication negotiation between Proxy server. Parses 'Proxy-Authentication' header in response and generates 'Proxy-Authorization' header in request.

Authentication filter is implemented using request filter of HTTPClient. It traps HTTP response header and maintains authentication state, and traps HTTP request header for inserting necessary authentication header.

ProxyAuth has sub filters (BasicAuth, NegotiateAuth, and SSPINegotiateAuth) and delegates some operations to it. NegotiateAuth requires 'ruby/ntlm' module. SSPINegotiateAuth requires 'win32/sspi' module.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initializeProxyAuth

Creates new ProxyAuth.


168
169
170
171
172
173
174
175
176
# File 'lib/httpclient/auth.rb', line 168

def initialize
  @basic_auth = ProxyBasicAuth.new
  @negotiate_auth = NegotiateAuth.new
  @ntlm_auth = NegotiateAuth.new('NTLM')
  @sspi_negotiate_auth = SSPINegotiateAuth.new
  @digest_auth = ProxyDigestAuth.new
  # sort authenticators by priority
  @authenticator = [@negotiate_auth, @ntlm_auth, @sspi_negotiate_auth, @digest_auth, @basic_auth]
end

Instance Attribute Details

#basic_authObject (readonly)

Returns the value of attribute basic_auth


162
163
164
# File 'lib/httpclient/auth.rb', line 162

def basic_auth
  @basic_auth
end

#digest_authObject (readonly)

Returns the value of attribute digest_auth


163
164
165
# File 'lib/httpclient/auth.rb', line 163

def digest_auth
  @digest_auth
end

#negotiate_authObject (readonly)

Returns the value of attribute negotiate_auth


164
165
166
# File 'lib/httpclient/auth.rb', line 164

def negotiate_auth
  @negotiate_auth
end

#sspi_negotiate_authObject (readonly)

Returns the value of attribute sspi_negotiate_auth


165
166
167
# File 'lib/httpclient/auth.rb', line 165

def sspi_negotiate_auth
  @sspi_negotiate_auth
end

Instance Method Details

#filter_request(req) ⇒ Object

Filter API implementation. Traps HTTP request and insert 'Proxy-Authorization' header if needed.


195
196
197
198
199
200
201
202
203
# File 'lib/httpclient/auth.rb', line 195

def filter_request(req)
  @authenticator.each do |auth|
    next unless auth.set? # hasn't be set, don't use it
    if cred = auth.get(req)
      req.header.set('Proxy-Authorization', auth.scheme + " " + cred)
      return
    end
  end
end

#filter_response(req, res) ⇒ Object

Filter API implementation. Traps HTTP response and parses 'Proxy-Authenticate' header.


207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
# File 'lib/httpclient/auth.rb', line 207

def filter_response(req, res)
  command = nil
  if res.status == HTTP::Status::PROXY_AUTHENTICATE_REQUIRED
    if challenge = parse_authentication_header(res, 'proxy-authenticate')
      uri = req.header.request_uri
      challenge.each do |scheme, param_str|
        @authenticator.each do |auth|
          next unless auth.set? # hasn't be set, don't use it
          if scheme.downcase == auth.scheme.downcase
            challengeable = auth.challenge(uri, param_str)
            command = :retry if challengeable
          end
        end
      end
      # ignore unknown authentication scheme
    end
  end
  command
end

#reset_challengeObject

Resets challenge state. See sub filters for more details.


179
180
181
182
183
# File 'lib/httpclient/auth.rb', line 179

def reset_challenge
  @authenticator.each do |auth|
    auth.reset_challenge
  end
end

#set_auth(user, passwd) ⇒ Object

Set authentication credential. See sub filters for more details.


186
187
188
189
190
191
# File 'lib/httpclient/auth.rb', line 186

def set_auth(user, passwd)
  @authenticator.each do |auth|
    auth.set(nil, user, passwd)
  end
  reset_challenge
end