Remove cliconf from httpapi connection (#46813)

* Bare minimum rip out cliconf

* nxapi changeover

* Update documentation, move options

* Memoize device_info

* Gratuitous rename to underscore use of local api implementation

Fixup eos module_utils like nxos

* Streamline version and image scans

* Expose get_capabilities through module_utils

* Add load_config to module_utils

* Support rpcs using both args and kwargs

* Add get_config for nxos

* Add get_diff

* module context, pulled from nxapi

We could probably do this correctly later

* Fix eos issues

* Limit connection._sub_plugin to only one plugin

lib/ansible/executor/task_executor.py

@@ -900,7 +900,7 @@ class TaskExecutor:
         final_vars = combine_vars(variables, variables.get('ansible_delegated_vars', dict()).get(self._task.delegate_to, dict()))
 
         option_vars = C.config.get_plugin_vars('connection', connection._load_name)
-        for plugin in connection._sub_plugins:
+        plugin = connection._sub_plugin
         if plugin['type'] != 'external':
             option_vars.extend(C.config.get_plugin_vars(plugin['type'], plugin['name']))
 

lib/ansible/module_utils/connection.py

@@ -100,10 +100,7 @@ def exec_command(module, command):
 def request_builder(method_, *args, **kwargs):
     reqid = str(uuid.uuid4())
     req = {'jsonrpc': '2.0', 'method': method_, 'id': reqid}
-
-    params = args or kwargs or None
-    if params:
-        req['params'] = params
+    req['params'] = (args, kwargs)
 
     return req
 

lib/ansible/module_utils/network/eos/eos.py

@@ -27,6 +27,7 @@
 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 # USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
+import json
 import os
 import time
 
@@ -99,10 +100,15 @@ def get_connection(module):
     global _DEVICE_CONNECTION
     if not _DEVICE_CONNECTION:
         load_params(module)
-        if is_eapi(module):
-            conn = Eapi(module)
+        if is_local_eapi(module):
+            conn = LocalEapi(module)
         else:
+            connection_proxy = Connection(module._socket_path)
+            cap = json.loads(connection_proxy.get_capabilities())
+            if cap['network_api'] == 'cliconf':
                 conn = Cli(module)
+            elif cap['network_api'] == 'eapi':
+                conn = HttpApi(module)
         _DEVICE_CONNECTION = conn
     return _DEVICE_CONNECTION
 
@@ -180,7 +186,7 @@ class Cli:
         return diff
 
 
-class Eapi:
+class LocalEapi:
 
     def __init__(self, module):
         self._module = module
@@ -394,18 +400,187 @@ class Eapi:
         return diff
 
 
+class HttpApi:
+    def __init__(self, module):
+        self._module = module
+        self._device_configs = {}
+        self._session_support = None
+        self._connection_obj = None
+
+    @property
+    def _connection(self):
+        if not self._connection_obj:
+            self._connection_obj = Connection(self._module._socket_path)
+
+        return self._connection_obj
+
+    def run_commands(self, commands, check_rc=True):
+        """Runs list of commands on remote device and returns results
+        """
+        output = None
+        queue = list()
+        responses = list()
+
+        def run_queue(queue, output):
+            try:
+                response = to_list(self._connection.send_request(queue, output=output))
+            except Exception as exc:
+                if check_rc:
+                    raise
+                return to_text(exc)
+
+            if output == 'json':
+                response = [json.loads(item) for item in response]
+            return response
+
+        for item in to_list(commands):
+            cmd_output = 'text'
+            if isinstance(item, dict):
+                command = item['command']
+                if 'output' in item:
+                    cmd_output = item['output']
+            else:
+                command = item
+
+            # Emulate '| json' from CLI
+            if is_json(command):
+                command = command.rsplit('|', 1)[0]
+                cmd_output = 'json'
+
+            if output and output != cmd_output:
+                responses.extend(run_queue(queue, output))
+                queue = list()
+
+            output = cmd_output
+            queue.append(command)
+
+        if queue:
+            responses.extend(run_queue(queue, output))
+
+        return responses
+
+    def get_config(self, flags=None):
+        """Retrieves the current config from the device or cache
+        """
+        flags = [] if flags is None else flags
+
+        cmd = 'show running-config '
+        cmd += ' '.join(flags)
+        cmd = cmd.strip()
+
+        try:
+            return self._device_configs[cmd]
+        except KeyError:
+            try:
+                out = self._connection.send_request(cmd)
+            except ConnectionError as exc:
+                self._module.fail_json(msg=to_text(exc, errors='surrogate_then_replace'))
+
+            cfg = to_text(out).strip()
+            self._device_configs[cmd] = cfg
+            return cfg
+
+    def get_diff(self, candidate=None, running=None, diff_match='line', diff_ignore_lines=None, path=None, diff_replace='line'):
+        diff = {}
+
+        # prepare candidate configuration
+        candidate_obj = NetworkConfig(indent=3)
+        candidate_obj.load(candidate)
+
+        if running and diff_match != 'none' and diff_replace != 'config':
+            # running configuration
+            running_obj = NetworkConfig(indent=3, contents=running, ignore_lines=diff_ignore_lines)
+            configdiffobjs = candidate_obj.difference(running_obj, path=path, match=diff_match, replace=diff_replace)
+
+        else:
+            configdiffobjs = candidate_obj.items
+
+        diff['config_diff'] = dumps(configdiffobjs, 'commands') if configdiffobjs else {}
+        return diff
+
+    def load_config(self, config, commit=False, replace=False):
+        """Loads the configuration onto the remote devices
+
+        If the device doesn't support configuration sessions, this will
+        fallback to using configure() to load the commands.  If that happens,
+        there will be no returned diff or session values
+        """
+        return self.edit_config(config, commit, replace)
+
+    def edit_config(self, config, commit=False, replace=False):
+        """Loads the configuration onto the remote devices
+
+        If the device doesn't support configuration sessions, this will
+        fallback to using configure() to load the commands.  If that happens,
+        there will be no returned diff or session values
+        """
+        session = 'ansible_%s' % int(time.time())
+        result = {'session': session}
+        banner_cmd = None
+        banner_input = []
+
+        commands = ['configure session %s' % session]
+        if replace:
+            commands.append('rollback clean-config')
+
+        for command in config:
+            if command.startswith('banner'):
+                banner_cmd = command
+                banner_input = []
+            elif banner_cmd:
+                if command == 'EOF':
+                    command = {'cmd': banner_cmd, 'input': '\n'.join(banner_input)}
+                    banner_cmd = None
+                    commands.append(command)
+                else:
+                    banner_input.append(command)
+                    continue
+            else:
+                commands.append(command)
+
+        try:
+            response = self._connection.send_request(commands)
+        except Exception:
+            commands = ['configure session %s' % session, 'abort']
+            response = self._connection.send_request(commands, output='text')
+            raise
+
+        commands = ['configure session %s' % session, 'show session-config diffs']
+        if commit:
+            commands.append('commit')
+        else:
+            commands.append('abort')
+
+        response = self._connection.send_request(commands, output='text')
+        diff = response[1].strip()
+        if diff:
+            result['diff'] = diff
+
+        return result
+
+    def get_capabilities(self):
+        """Returns platform info of the remove device
+        """
+        try:
+            capabilities = self._connection.get_capabilities()
+        except ConnectionError as exc:
+            self._module.fail_json(msg=to_text(exc, errors='surrogate_then_replace'))
+
+        return json.loads(capabilities)
+
+
 def is_json(cmd):
-    return to_native(cmd, errors='surrogate_then_replace').endswith('| json')
+    return to_text(cmd, errors='surrogate_then_replace').endswith('| json')
 
 
-def is_eapi(module):
+def is_local_eapi(module):
     transport = module.params['transport']
     provider_transport = (module.params['provider'] or {}).get('transport')
     return 'eapi' in (transport, provider_transport)
 
 
 def to_command(module, commands):
-    if is_eapi(module):
+    if is_local_eapi(module):
         default_output = 'json'
     else:
         default_output = 'text'

lib/ansible/module_utils/network/nxos/nxos.py

@@ -105,10 +105,15 @@ def get_connection(module):
     global _DEVICE_CONNECTION
     if not _DEVICE_CONNECTION:
         load_params(module)
-        if is_nxapi(module):
-            conn = Nxapi(module)
+        if is_local_nxapi(module):
+            conn = LocalNxapi(module)
         else:
+            connection_proxy = Connection(module._socket_path)
+            cap = json.loads(connection_proxy.get_capabilities())
+            if cap['network_api'] == 'cliconf':
                 conn = Cli(module)
+            elif cap['network_api'] == 'nxapi':
+                conn = HttpApi(module)
         _DEVICE_CONNECTION = conn
     return _DEVICE_CONNECTION
 
@@ -244,7 +249,7 @@ class Cli:
         return None
 
 
-class Nxapi:
+class LocalNxapi:
 
     OUTPUT_TO_COMMAND_TYPE = {
         'text': 'cli_show_ascii',
@@ -496,22 +501,178 @@ class Nxapi:
         return None
 
 
+class HttpApi:
+    def __init__(self, module):
+        self._module = module
+        self._device_configs = {}
+        self._module_context = {}
+        self._connection_obj = None
+
+    @property
+    def _connection(self):
+        if not self._connection_obj:
+            self._connection_obj = Connection(self._module._socket_path)
+
+        return self._connection_obj
+
+    def run_commands(self, commands, check_rc=True):
+        """Runs list of commands on remote device and returns results
+        """
+        try:
+            out = self._connection.send_request(commands)
+        except ConnectionError as exc:
+            if check_rc is True:
+                raise
+            out = to_text(exc)
+
+        out = to_list(out)
+        if not out[0]:
+            return out
+
+        for index, response in enumerate(out):
+            if response[0] == '{':
+                out[index] = json.loads(response)
+
+        return out
+
+    def get_config(self, flags=None):
+        """Retrieves the current config from the device or cache
+        """
+        flags = [] if flags is None else flags
+
+        cmd = 'show running-config '
+        cmd += ' '.join(flags)
+        cmd = cmd.strip()
+
+        try:
+            return self._device_configs[cmd]
+        except KeyError:
+            try:
+                out = self._connection.send_request(cmd)
+            except ConnectionError as exc:
+                self._module.fail_json(msg=to_text(exc, errors='surrogate_then_replace'))
+
+            cfg = to_text(out).strip()
+            self._device_configs[cmd] = cfg
+            return cfg
+
+    def get_diff(self, candidate=None, running=None, diff_match='line', diff_ignore_lines=None, path=None, diff_replace='line'):
+        diff = {}
+
+        # prepare candidate configuration
+        candidate_obj = NetworkConfig(indent=2)
+        candidate_obj.load(candidate)
+
+        if running and diff_match != 'none' and diff_replace != 'config':
+            # running configuration
+            running_obj = NetworkConfig(indent=2, contents=running, ignore_lines=diff_ignore_lines)
+            configdiffobjs = candidate_obj.difference(running_obj, path=path, match=diff_match, replace=diff_replace)
+
+        else:
+            configdiffobjs = candidate_obj.items
+
+        diff['config_diff'] = dumps(configdiffobjs, 'commands') if configdiffobjs else ''
+        return diff
+
+    def load_config(self, commands, return_error=False, opts=None, replace=None):
+        """Sends the ordered set of commands to the device
+        """
+        if opts is None:
+            opts = {}
+
+        responses = []
+        try:
+            resp = self.edit_config(commands, replace=replace)
+        except ConnectionError as exc:
+            code = getattr(exc, 'code', 1)
+            message = getattr(exc, 'err', exc)
+            err = to_text(message, errors='surrogate_then_replace')
+            if opts.get('ignore_timeout') and code:
+                responses.append(code)
+                return responses
+            elif code and 'no graceful-restart' in err:
+                if 'ISSU/HA will be affected if Graceful Restart is disabled' in err:
+                    msg = ['']
+                    responses.extend(msg)
+                    return responses
+                else:
+                    self._module.fail_json(msg=err)
+            elif code:
+                self._module.fail_json(msg=err)
+
+        responses.extend(resp)
+        return responses
+
+    def edit_config(self, candidate=None, commit=True, replace=None, comment=None):
+        resp = list()
+
+        self.check_edit_config_capability(candidate, commit, replace, comment)
+
+        if replace:
+            candidate = 'config replace {0}'.format(replace)
+
+        responses = self._connection.send_request(candidate, output='config')
+        for response in to_list(responses):
+            if response != '{}':
+                resp.append(response)
+        if not resp:
+            resp = ['']
+
+        return resp
+
+    def get_capabilities(self):
+        """Returns platform info of the remove device
+        """
+        try:
+            capabilities = self._connection.get_capabilities()
+        except ConnectionError as exc:
+            self._module.fail_json(msg=to_text(exc, errors='surrogate_then_replace'))
+
+        return json.loads(capabilities)
+
+    def check_edit_config_capability(self, candidate=None, commit=True, replace=None, comment=None):
+        operations = self._connection.get_device_operations()
+
+        if not candidate and not replace:
+            raise ValueError("must provide a candidate or replace to load configuration")
+
+        if commit not in (True, False):
+            raise ValueError("'commit' must be a bool, got %s" % commit)
+
+        if replace and not operations.get('supports_replace'):
+            raise ValueError("configuration replace is not supported")
+
+        if comment and not operations.get('supports_commit_comment', False):
+            raise ValueError("commit comment is not supported")
+
+    def read_module_context(self, module_key):
+        if self._module_context.get(module_key):
+            return self._module_context[module_key]
+
+        return None
+
+    def save_module_context(self, module_key, module_context):
+        self._module_context[module_key] = module_context
+
+        return None
+
+
 def is_json(cmd):
-    return str(cmd).endswith('| json')
+    return to_text(cmd).endswith('| json')
 
 
 def is_text(cmd):
     return not is_json(cmd)
 
 
-def is_nxapi(module):
+def is_local_nxapi(module):
     transport = module.params['transport']
     provider_transport = (module.params['provider'] or {}).get('transport')
     return 'nxapi' in (transport, provider_transport)
 
 
 def to_command(module, commands):
-    if is_nxapi(module):
+    if is_local_nxapi(module):
         default_output = 'json'
     else:
         default_output = 'text'

lib/ansible/plugins/cliconf/eos.py

@@ -50,8 +50,6 @@ from ansible.module_utils.common._collections_compat import Mapping
 from ansible.module_utils.network.common.utils import to_list
 from ansible.module_utils.network.common.config import NetworkConfig, dumps
 from ansible.plugins.cliconf import CliconfBase, enable_mode
-from ansible.plugins.connection.network_cli import Connection as NetworkCli
-from ansible.plugins.connection.httpapi import Connection as HttpApi
 
 
 class Cliconf(CliconfBase):
@@ -60,20 +58,6 @@ class Cliconf(CliconfBase):
         super(Cliconf, self).__init__(*args, **kwargs)
         self._session_support = None
 
-    def send_command(self, command, **kwargs):
-        """Executes a cli command and returns the results
-        This method will execute the CLI command on the connection and return
-        the results to the caller.  The command output will be returned as a
-        string
-        """
-        if isinstance(self._connection, NetworkCli):
-            resp = super(Cliconf, self).send_command(command, **kwargs)
-        elif isinstance(self._connection, HttpApi):
-            resp = self._connection.send_request(command, **kwargs)
-        else:
-            raise ValueError("Invalid connection type")
-        return resp
-
     @enable_mode
     def get_config(self, source='running', format='text', flags=None):
         options_values = self.get_option_values()
@@ -294,13 +278,8 @@ class Cliconf(CliconfBase):
         result['device_info'] = self.get_device_info()
         result['device_operations'] = self.get_device_operations()
         result.update(self.get_option_values())
-
-        if isinstance(self._connection, NetworkCli):
         result['network_api'] = 'cliconf'
-        elif isinstance(self._connection, HttpApi):
-            result['network_api'] = 'eapi'
-        else:
-            raise ValueError("Invalid connection type")
+
         return json.dumps(result)
 
     def _get_command_with_output(self, command, output):

lib/ansible/plugins/cliconf/nxos.py

@@ -29,8 +29,6 @@ from ansible.module_utils.connection import ConnectionError
 from ansible.module_utils.network.common.config import NetworkConfig, dumps
 from ansible.module_utils.network.common.utils import to_list
 from ansible.plugins.cliconf import CliconfBase, enable_mode
-from ansible.plugins.connection.network_cli import Connection as NetworkCli
-from ansible.plugins.connection.httpapi import Connection as HttpApi
 
 
 class Cliconf(CliconfBase):
@@ -50,20 +48,6 @@ class Cliconf(CliconfBase):
 
         return None
 
-    def send_command(self, command, **kwargs):
-        """Executes a cli command and returns the results
-        This method will execute the CLI command on the connection and return
-        the results to the caller.  The command output will be returned as a
-        string
-        """
-        if isinstance(self._connection, NetworkCli):
-            resp = super(Cliconf, self).send_command(command, **kwargs)
-        elif isinstance(self._connection, HttpApi):
-            resp = self._connection.send_request(command, **kwargs)
-        else:
-            raise ValueError("Invalid connection type")
-        return resp
-
     def get_device_info(self):
         device_info = {}
 
@@ -261,13 +245,8 @@ class Cliconf(CliconfBase):
         result['device_info'] = self.get_device_info()
         result['device_operations'] = self.get_device_operations()
         result.update(self.get_option_values())
-
-        if isinstance(self._connection, NetworkCli):
         result['network_api'] = 'cliconf'
-        elif isinstance(self._connection, HttpApi):
-            result['network_api'] = 'nxapi'
-        else:
-            raise ValueError("Invalid connection type")
+
         return json.dumps(result)
 
     def _get_command_with_output(self, command, output):

lib/ansible/plugins/connection/__init__.py

@@ -297,7 +297,7 @@ class NetworkConnectionBase(ConnectionBase):
         self._local = connection_loader.get('local', play_context, '/dev/null')
         self._local.set_options()
 
-        self._sub_plugins = []
+        self._sub_plugin = {}
         self._cached_variables = (None, None, None)
 
         # reconstruct the socket_path and set instance values accordingly
@@ -309,8 +309,9 @@ class NetworkConnectionBase(ConnectionBase):
             return self.__dict__[name]
         except KeyError:
             if not name.startswith('_'):
-                for plugin in self._sub_plugins:
-                    method = getattr(plugin['obj'], name, None)
+                plugin = self._sub_plugin.get('obj')
+                if plugin:
+                    method = getattr(plugin, name, None)
                     if method is not None:
                         return method
             raise AttributeError("'%s' object has no attribute '%s'" % (self.__class__.__name__, name))
@@ -342,10 +343,9 @@ class NetworkConnectionBase(ConnectionBase):
     def set_options(self, task_keys=None, var_options=None, direct=None):
         super(NetworkConnectionBase, self).set_options(task_keys=task_keys, var_options=var_options, direct=direct)
 
-        for plugin in self._sub_plugins:
-            if plugin['type'] != 'external':
+        if self._sub_plugin.get('obj') and self._sub_plugin.get('type') != 'external':
             try:
-                    plugin['obj'].set_options(task_keys=task_keys, var_options=var_options, direct=direct)
+                self._sub_plugin['obj'].set_options(task_keys=task_keys, var_options=var_options, direct=direct)
             except AttributeError:
                 pass
 

lib/ansible/plugins/connection/httpapi.py

@@ -37,8 +37,8 @@ options:
   network_os:
     description:
       - Configures the device platform network operating system.  This value is
-        used to load the correct httpapi and cliconf plugins to communicate
-        with the remote device
+        used to load the correct httpapi plugin to communicate with the remote
+        device
     vars:
       - name: ansible_network_os
   remote_user:
@@ -154,7 +154,7 @@ from ansible.module_utils.six.moves import cPickle
 from ansible.module_utils.six.moves.urllib.error import HTTPError, URLError
 from ansible.module_utils.urls import open_url
 from ansible.playbook.play_context import PlayContext
-from ansible.plugins.loader import cliconf_loader, httpapi_loader
+from ansible.plugins.loader import httpapi_loader
 from ansible.plugins.connection import NetworkConnectionBase
 from ansible.utils.display import Display
 
@@ -177,17 +177,11 @@ class Connection(NetworkConnectionBase):
 
             self.httpapi = httpapi_loader.get(self._network_os, self)
             if self.httpapi:
-                self._sub_plugins.append({'type': 'httpapi', 'name': self._network_os, 'obj': self.httpapi})
+                self._sub_plugin = {'type': 'httpapi', 'name': self._network_os, 'obj': self.httpapi}
                 display.vvvv('loaded API plugin for network_os %s' % self._network_os)
             else:
                 raise AnsibleConnectionFailure('unable to load API plugin for network_os %s' % self._network_os)
 
-            self.cliconf = cliconf_loader.get(self._network_os, self)
-            if self.cliconf:
-                self._sub_plugins.append({'type': 'cliconf', 'name': self._network_os, 'obj': self.cliconf})
-                display.vvvv('loaded cliconf plugin for network_os %s' % self._network_os)
-            else:
-                display.vvvv('unable to load cliconf for network_os %s' % self._network_os)
         else:
             raise AnsibleConnectionFailure(
                 'Unable to automatically determine host network os. Please '

lib/ansible/plugins/connection/napalm.py

@@ -183,7 +183,7 @@ class Connection(NetworkConnectionBase):
 
             self.napalm.open()
 
-            self._sub_plugins.append({'type': 'external', 'name': 'napalm', 'obj': self.napalm})
+            self._sub_plugin = {'type': 'external', 'name': 'napalm', 'obj': self.napalm}
             display.vvvv('created napalm device for network_os %s' % self._network_os, host=host)
             self._connected = True
 

lib/ansible/plugins/connection/netconf.py

@@ -217,11 +217,11 @@ class Connection(NetworkConnectionBase):
 
         netconf = netconf_loader.get(self._network_os, self)
         if netconf:
-            self._sub_plugins.append({'type': 'netconf', 'name': self._network_os, 'obj': netconf})
+            self._sub_plugin = {'type': 'netconf', 'name': self._network_os, 'obj': netconf}
             display.display('loaded netconf plugin for network_os %s' % self._network_os, log_only=True)
         else:
             netconf = netconf_loader.get("default", self)
-            self._sub_plugins.append({'type': 'netconf', 'name': 'default', 'obj': netconf})
+            self._sub_plugin = {'type': 'netconf', 'name': 'default', 'obj': netconf}
             display.display('unable to load netconf plugin for network_os %s, falling back to default plugin' % self._network_os)
         display.display('network_os is set to %s' % self._network_os, log_only=True)
 

lib/ansible/plugins/connection/network_cli.py

@@ -231,7 +231,7 @@ class Connection(NetworkConnectionBase):
             self.cliconf = cliconf_loader.get(self._network_os, self)
             if self.cliconf:
                 display.vvvv('loaded cliconf plugin for network_os %s' % self._network_os)
-                self._sub_plugins.append({'type': 'cliconf', 'name': self._network_os, 'obj': self.cliconf})
+                self._sub_plugin = {'type': 'cliconf', 'name': self._network_os, 'obj': self.cliconf}
             else:
                 display.vvvv('unable to load cliconf for network_os %s' % self._network_os)
         else:

lib/ansible/plugins/httpapi/eos.py

@@ -4,8 +4,29 @@
 from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
+DOCUMENTATION = """
+---
+author: Ansible Networking Team
+httpapi: eos
+short_description: Use eAPI to run command on eos platform
+description:
+  - This eos plugin provides low level abstraction api's for
+    sending and receiving CLI commands with eos network devices.
+version_added: "2.6"
+options:
+  eos_use_sessions:
+    type: int
+    default: 1
+    description:
+      - Specifies if sessions should be used on remote host or not
+    env:
+      - name: ANSIBLE_EOS_USE_SESSIONS
+    vars:
+      - name: ansible_eos_use_sessions
+        version_added: '2.8'
+"""
+
 import json
-import time
 
 from ansible.module_utils._text import to_text
 from ansible.module_utils.connection import ConnectionError
@@ -16,7 +37,39 @@ from ansible.utils.display import Display
 display = Display()
 
 
+OPTIONS = {
+    'format': ['text', 'json'],
+    'diff_match': ['line', 'strict', 'exact', 'none'],
+    'diff_replace': ['line', 'block', 'config'],
+    'output': ['text', 'json']
+}
+
+
 class HttpApi(HttpApiBase):
+    def __init__(self, *args, **kwargs):
+        super(HttpApi, self).__init__(*args, **kwargs)
+        self._device_info = None
+        self._session_support = None
+
+    @property
+    def supports_sessions(self):
+        use_session = self.get_option('eos_use_sessions')
+        try:
+            use_session = int(use_session)
+        except ValueError:
+            pass
+
+        if not bool(use_session):
+            self._session_support = False
+        else:
+            if self._session_support:
+                return self._session_support
+
+            response = self.send_request('show configuration sessions')
+            self._session_support = 'error' not in response
+
+        return self._session_support
+
     def send_request(self, data, **message_kwargs):
         data = to_list(data)
         if self._become:
@@ -45,117 +98,51 @@ class HttpApi(HttpApiBase):
 
         return results
 
-    def get_prompt(self):
-        # Fake a prompt for @enable_mode
-        if self._become:
-            return '#'
-        return '>'
-
-    # Imported from module_utils
-    def edit_config(self, config, commit=False, replace=False):
-        """Loads the configuration onto the remote devices
-
-        If the device doesn't support configuration sessions, this will
-        fallback to using configure() to load the commands.  If that happens,
-        there will be no returned diff or session values
-        """
-        session = 'ansible_%s' % int(time.time())
-        result = {'session': session}
-        banner_cmd = None
-        banner_input = []
-
-        commands = ['configure session %s' % session]
-        if replace:
-            commands.append('rollback clean-config')
-
-        for command in config:
-            if command.startswith('banner'):
-                banner_cmd = command
-                banner_input = []
-            elif banner_cmd:
-                if command == 'EOF':
-                    command = {'cmd': banner_cmd, 'input': '\n'.join(banner_input)}
-                    banner_cmd = None
-                    commands.append(command)
-                else:
-                    banner_input.append(command)
-                    continue
-            else:
-                commands.append(command)
-
-        try:
-            response = self.send_request(commands)
-        except Exception:
-            commands = ['configure session %s' % session, 'abort']
-            response = self.send_request(commands, output='text')
-            raise
-
-        commands = ['configure session %s' % session, 'show session-config diffs']
-        if commit:
-            commands.append('commit')
-        else:
-            commands.append('abort')
+    def get_device_info(self):
+        if self._device_info:
+            return self._device_info
 
-        response = self.send_request(commands, output='text')
-        diff = response[1].strip()
-        if diff:
-            result['diff'] = diff
+        device_info = {}
 
-        return result
+        device_info['network_os'] = 'eos'
+        reply = self.send_request('show version | json')
+        data = json.loads(reply)
 
-    def run_commands(self, commands, check_rc=True):
-        """Runs list of commands on remote device and returns results
-        """
-        output = None
-        queue = list()
-        responses = list()
+        device_info['network_os_version'] = data['version']
+        device_info['network_os_model'] = data['modelName']
 
-        def run_queue(queue, output):
-            try:
-                response = to_list(self.send_request(queue, output=output))
-            except Exception as exc:
-                if check_rc:
-                    raise
-                return to_text(exc)
-
-            if output == 'json':
-                response = [json.loads(item) for item in response]
-            return response
-
-        for item in to_list(commands):
-            cmd_output = 'text'
-            if isinstance(item, dict):
-                command = item['command']
-                if 'output' in item:
-                    cmd_output = item['output']
-            else:
-                command = item
-
-            # Emulate '| json' from CLI
-            if command.endswith('| json'):
-                command = command.rsplit('|', 1)[0]
-                cmd_output = 'json'
+        reply = self.send_request('show hostname | json')
+        data = json.loads(reply)
 
-            if output and output != cmd_output:
-                responses.extend(run_queue(queue, output))
-                queue = list()
+        device_info['network_os_hostname'] = data['hostname']
 
-            output = cmd_output
-            queue.append(command)
+        self._device_info = device_info
+        return self._device_info
 
-        if queue:
-            responses.extend(run_queue(queue, output))
+    def get_device_operations(self):
+        return {
+            'supports_diff_replace': True,
+            'supports_commit': bool(self.supports_sessions),
+            'supports_rollback': False,
+            'supports_defaults': False,
+            'supports_onbox_diff': bool(self.supports_sessions),
+            'supports_commit_comment': False,
+            'supports_multiline_delimiter': False,
+            'supports_diff_match': True,
+            'supports_diff_ignore_lines': True,
+            'supports_generate_diff': not bool(self.supports_sessions),
+            'supports_replace': bool(self.supports_sessions),
+        }
 
-        return responses
+    def get_capabilities(self):
+        result = {}
+        result['rpc'] = []
+        result['device_info'] = self.get_device_info()
+        result['device_operations'] = self.get_device_operations()
+        result.update(OPTIONS)
+        result['network_api'] = 'eapi'
 
-    def load_config(self, config, commit=False, replace=False):
-        """Loads the configuration onto the remote devices
-
-        If the device doesn't support configuration sessions, this will
-        fallback to using configure() to load the commands.  If that happens,
-        there will be no returned diff or session values
-        """
-        return self.edit_config(config, commit, replace)
+        return json.dumps(result)
 
 
 def handle_response(response):
@@ -170,6 +157,7 @@ def handle_response(response):
         raise ConnectionError(error_text, code=error['code'])
 
     results = []
+
     for result in response['result']:
         if 'messages' in result:
             results.append(result['messages'][0])

lib/ansible/plugins/httpapi/nxos.py

@@ -4,7 +4,19 @@
 from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
+DOCUMENTATION = """
+---
+author: Ansible Networking Team
+httpapi: nxos
+short_description: Use NX-API to run command on nxos platform
+description:
+  - This eos plugin provides low level abstraction api's for
+    sending and receiving CLI commands with nxos network devices.
+version_added: "2.6"
+"""
+
 import json
+import re
 
 from ansible.module_utils._text import to_text
 from ansible.module_utils.connection import ConnectionError
@@ -15,29 +27,18 @@ from ansible.utils.display import Display
 display = Display()
 
 
-class HttpApi(HttpApiBase):
-    def _run_queue(self, queue, output):
-        if self._become:
-            display.vvvv('firing event: on_become')
-            queue.insert(0, 'enable')
-
-        request = request_builder(queue, output)
-        headers = {'Content-Type': 'application/json'}
-
-        response, response_data = self.connection.send('/ins', request, headers=headers, method='POST')
-
-        try:
-            response_data = json.loads(to_text(response_data.getvalue()))
-        except ValueError:
-            raise ConnectionError('Response was not valid JSON, got {0}'.format(
-                to_text(response_data.getvalue())
-            ))
+OPTIONS = {
+    'format': ['text', 'json'],
+    'diff_match': ['line', 'strict', 'exact', 'none'],
+    'diff_replace': ['line', 'block', 'config'],
+    'output': ['text', 'json']
+}
 
-        results = handle_response(response_data)
 
-        if self._become:
-            results = results[1:]
-        return results
+class HttpApi(HttpApiBase):
+    def __init__(self, *args, **kwargs):
+        super(HttpApi, self).__init__(*args, **kwargs)
+        self._device_info = None
 
     def send_request(self, data, **message_kwargs):
         output = None
@@ -72,46 +73,93 @@ class HttpApi(HttpApiBase):
             return responses[0]
         return responses
 
-    def edit_config(self, candidate=None, commit=True, replace=None, comment=None):
-        resp = list()
+    def _run_queue(self, queue, output):
+        if self._become:
+            display.vvvv('firing event: on_become')
+            queue.insert(0, 'enable')
 
-        operations = self.connection.get_device_operations()
-        self.connection.check_edit_config_capability(operations, candidate, commit, replace, comment)
+        request = request_builder(queue, output)
+        headers = {'Content-Type': 'application/json'}
 
-        if replace:
-            device_info = self.connection.get_device_info()
-            if '9K' not in device_info.get('network_os_platform', ''):
-                raise ConnectionError(msg=u'replace is supported only on Nexus 9K devices')
-            candidate = 'config replace {0}'.format(replace)
+        response, response_data = self.connection.send('/ins', request, headers=headers, method='POST')
 
-        responses = self.send_request(candidate, output='config')
-        for response in to_list(responses):
-            if response != '{}':
-                resp.append(response)
-        if not resp:
-            resp = ['']
+        try:
+            response_data = json.loads(to_text(response_data.getvalue()))
+        except ValueError:
+            raise ConnectionError('Response was not valid JSON, got {0}'.format(
+                to_text(response_data.getvalue())
+            ))
 
-        return resp
+        results = handle_response(response_data)
 
-    def run_commands(self, commands, check_rc=True):
-        """Runs list of commands on remote device and returns results
-        """
-        try:
-            out = self.send_request(commands)
-        except ConnectionError as exc:
-            if check_rc is True:
-                raise
-            out = to_text(exc)
+        if self._become:
+            results = results[1:]
+        return results
 
-        out = to_list(out)
-        if not out[0]:
-            return out
+    def get_device_info(self):
+        if self._device_info:
+            return self._device_info
+
+        device_info = {}
+
+        device_info['network_os'] = 'nxos'
+        reply = self.send_request('show version')
+        platform_reply = self.send_request('show inventory')
+
+        find_os_version = [r'\s+system:\s+version\s*(\S+)', r'\s+kickstart:\s+version\s*(\S+)', r'\s+NXOS:\s+version\s*(\S+)']
+        for regex in find_os_version:
+            match_ver = re.search(regex, reply, re.M)
+            if match_ver:
+                device_info['network_os_version'] = match_ver.group(1)
+                break
+
+        match_chassis_id = re.search(r'Hardware\n\s+cisco\s*(\S+\s+\S+)', reply, re.M)
+        if match_chassis_id:
+            device_info['network_os_model'] = match_chassis_id.group(1)
+
+        match_host_name = re.search(r'\s+Device name:\s*(\S+)', reply, re.M)
+        if match_host_name:
+            device_info['network_os_hostname'] = match_host_name.group(1)
+
+        find_os_image = [r'\s+system image file is:\s*(\S+)', r'\s+kickstart image file is:\s*(\S+)', r'\s+NXOS image file is:\s*(\S+)']
+        for regex in find_os_image:
+            match_file_name = re.search(regex, reply, re.M)
+            if match_file_name:
+                device_info['network_os_image'] = match_file_name.group(1)
+                break
+
+        match_os_platform = re.search(r'NAME: "Chassis",\s*DESCR:.*\nPID:\s*(\S+)', platform_reply, re.M)
+        if match_os_platform:
+            device_info['network_os_platform'] = match_os_platform.group(1)
+
+        self._device_info = device_info
+        return self._device_info
+
+    def get_device_operations(self):
+        platform = self.get_device_info().get('network_os_platform', '')
+        return {
+            'supports_diff_replace': True,
+            'supports_commit': False,
+            'supports_rollback': False,
+            'supports_defaults': True,
+            'supports_onbox_diff': False,
+            'supports_commit_comment': False,
+            'supports_multiline_delimiter': False,
+            'supports_diff_match': True,
+            'supports_diff_ignore_lines': True,
+            'supports_generate_diff': True,
+            'supports_replace': True if '9K' in platform else False,
+        }
 
-        for index, response in enumerate(out):
-            if response[0] == '{':
-                out[index] = json.loads(response)
+    def get_capabilities(self):
+        result = {}
+        result['rpc'] = []
+        result['device_info'] = self.get_device_info()
+        result['device_operations'] = self.get_device_operations()
+        result.update(OPTIONS)
+        result['network_api'] = 'nxapi'
 
-        return out
+        return json.dumps(result)
 
 
 def handle_response(response):

lib/ansible/utils/jsonrpc.py

@@ -27,17 +27,9 @@ class JsonRpcServer(object):
             error = self.invalid_request()
             return json.dumps(error)
 
-        params = request.get('params')
+        args, kwargs = request.get('params')
         setattr(self, '_identifier', request.get('id'))
 
-        args = []
-        kwargs = {}
-
-        if all((params, isinstance(params, list))):
-            args = params
-        elif all((params, isinstance(params, dict))):
-            kwargs = params
-
         rpc_method = None
         for obj in self._objects:
             rpc_method = getattr(obj, method, None)