Skip to main content

A Python library to easily build CubicWeb clients

Project description

Summary

A Python library to easily build CubicWeb clients:

It also provides a simple command line tool (cwrql) to execute simple requests.

Requirements

client side:

server side:

Configuration

cwclientlib offers a cwproxy_for(instance) function that wil build a CWProxy for the given instance which authentication credentials are read from a configuration file (can be a ini file, json or yaml). The default configuration file name is ~/.config/cwclientlibrc (using the ini file format), but this can be changed definig the CWCLCONF environment variable. For example:

david@perseus:~$ cat ~/.config/cwclientlibrc
[cwo]
url = https://www.cubicweb.org/
token-id = my_cwo_token
secret = <my-secret>

[elo]
url = https://www.logilab.org
token-id = my_elo_token
secret = <my-secret>

[activites]
url = https://my.intranet/activites
auth-mech = kerberos

allows to write:

david@perseus:~$ cwrql cwo "Any N,S WHERE P eid 1251664, P name N, P summary S"
projman a project management tool

david@perseus:~$ cwrql -v ejsonexport -j cwo "Any P WHERE P eid 1251664"
[{"description": "It reads project descriptions [...]",
"modification_date": "2015/02/13 18:12:40",
"icon_format": null,
"description_format": "text/rest",
"summary": "a project management tool",
"downloadurl": "http://download.logilab.org/pub/projman",
"cwuri": "http://www.logilab.org/873",
"__cwetype__": "Project",
"eid": 1251664,
"creation_date": "2006/09/28 17:44:38",
"homepage": null,
"debian_source_package": null,
"name": "projman"}]

or:

from cwclientlib import cwproxy_for

client = cwproxy_for('cwo')
# or client = cwproxy_for('https://www.cubicweb.org/')
query = 'Any X WHERE X is Ticket, X concerns P, P name "cwclientlib"'
resp = client.rql(query)
data = resp.json()

Using signed requests

Once the cube signedrequest is added, in the WebUI:

  1. View a CWUser and click the action add an AuthToken

  2. Give an identifier to the token and make it enabled

  3. Use the token identifier and the token in your source code

Using Kerberos

Just make sure Python-Kerberos and Requests-Kerberos are installed. The cubicweb server must, indeed, support kerberos-based authentication.

Configuration

You can define url and credentials for commonly used cubicweb endpoints in a config file. By default, on Linux, it will be a ini file located at $HOME/.config/cwclientlibrc but you may define the CWCLCONF environmentvariable to specify it. This config file can also be a YAML (file name must end with .yaml) or a JSON file (.json).

The file will look like:

[cwo]
url = https://www.cubicweb.org/
token-id = my token id
secret = <my secret>

[intra]
url = https://my.intranet
auth-mech = kerberos
server-ca = /path/to/ca-bundle.pem

Command line tools

cwclientlib comes with 3 simple command-line tools allowing to easily request a cubicweb application from a shell:

cwrql to make RQL queries:

david@perseus:~$ cwrql -h
Usage: cwrql [options] (url|instance_id) rqlquery [rqlquery2] ...

Options:
  -h, --help         show this help message and exit
  -j, --json         produce JSON data
  -v VID, --vid=VID  vid to use (default is jsonexport)
  -S, --no-ssl       do NOT verify ssl server certificate; ignored if --ca is
                     given
  -c CA, --ca=CA     Bundle CA to use to verify server certificate
  -w, --rqlio        use rqlio
david@perseus:~$ cwrql  cwo  "Any VN, VS WHERE V version_of P,
> P name 'cwclientlib', V num VN, V in_state S, S name VS"
0.2.1 published
0.3.0 dev
0.2.0 published
0.1.0 published

cwget to make any king of GET request (ie. call a specific cubicweb controller):

david@perseus:~$ cwget cwo /testconfig/1251730 \
vid=apycot.get_configuration  environment=4209277
[{"pylint_threshold": "7", "install": "python_setup", "pycoverage_threshold": "70"}]

cwshell to connect to a cubicweb endopint and start an interactive python shell with a few additional builtins rql and client. This shell also provides RQL auto-completion:

david@perseus:~$ cwshell cwo
You are connected to https://www.cubicweb.org
>>> client.execute('Any X WHERE X is P
Patch               Plan                Project             ProjectEnvironment
>>> rql('Any P, N WHERE X is Project, X name P ,V version_of X, V in_state S, V num N, S name "ready"')
[[u'cubicweb-pyramid', u'0.2.0'], [u'cubicweb-simplefacet', u'0.3.2']]
>>>

Available extra builtins:

client:

is the CWProxy instance connected to the cubicweb endpoint.

rql:

shortcut for client.execute().

Python examples

Simple read only query:

from cwclientlib import cwproxy

client = cwproxy.CWProxy('http://www.cubicweb.org/')
query = 'Any X WHERE X is Ticket, X concerns P, P name "cwclientlib"'
resp = client.rql(query)
data = resp.json()

Creating an entity, authenticating with signedrequest with credentials read from the config file:

from cwclientlib import cwproxy_for

client = cwproxy_for('cwo')
queries = [('INSERT CWUser U: U login %(l)s, U upassword %(p)s',
            {'l': 'Babar', 'p': 'cubicweb rulez & 42'}), ]
resp = client.rqlio(queries)
data = resp.json()

Creating an entity, authenticating with signedrequest building the authentifier by hand:

from cwclientlib import cwproxy

auth = cwproxy.SignedRequestAuth('my token', '6ed44d82172211e49d9777269ec78bae')
client = cwproxy.CWProxy('https://www.cubicweb.org/', auth)
queries = [('INSERT CWUser U: U login %(l)s, U upassword %(p)s',
            {'l': 'Babar', 'p': 'cubicweb rulez & 42'}), ]
resp = client.rqlio(queries)
data = resp.json()

Creating a file entity, authenticating with signedrequest:

from io import BytesIO
from cwclientlib import cwproxy_for

client = cwproxy_for('cwo')
queries = [('INSERT File F: F data %(content)s, F data_name %(fname)s',
            {'content': BytesIO('some binary data'), 'fname': 'toto.bin'})]
resp = client.rqlio(queries)
data = resp.json()

Using builders helpers, authenticating explicitely with the kerberos authentifier:

from cwclientlib import cwproxy, builders
from requests_kerberos import HTTPKerberosAuth, OPTIONAL

auth = HTTPKerberosAuth(mutual_authentication=OPTIONAL)
client = cwproxy.CWProxy('https://www.cubicweb.org/', auth)
queries = [builders.create_entity('CWUser', login='Babar', password='secret'),
           builders.build_trinfo('__r0', 'disable', 'not yet activated'),
          ]
resp = client.rqlio(queries)
data = resp.json()

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

cwclientlib-0.3.0.tar.gz (29.0 kB view hashes)

Uploaded Source

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page