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Project Description

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A generic client for RESTful APIs based on requests.

For an async version based on aiohttp, see genericclient-aiohttp (Python 3.5+ only).

Installation

$ pip install genericclient

Quickstart

from genericclient import GenericClient

myclient = GenericClient(api_url)

myresource = myclient.resources.get(id=1)

actives = myclient.posts.filter(active=True)

Usage

Instantiation

myclient = GenericClient(url, auth=None, session=None, adapter=None, trailing_slash=False, autopaginate=None)

Arguments:

  • url: The root URL of your API
  • auth: The auth for your API. You can pass anything that requests can accept as auth.
  • session: Pass a session instance to have requests use that session. If None (the default), it will instantiate an instance of requests.session for you.
  • adapter: optional session adapter for requests.
  • trailing_slash: You can set this to True if your API’s URLs end with a /
  • autopaginate: You can set this to a callable to fetch all pages resulting from a request. Currently, the only callable included is genericclient.pagination.link_header, which supports [RFC5988](https://tools.ietf.org/html/rfc5988).

Endpoints

Endpoints are available as properties on the main instance.

.all()

Retrieves all resources (essentially a simple GET on the endpoint):

myclient.posts.all()  # GET /posts/

.filter()

.filter(**kwargs) calls a GET with kwargs as querystring values:

myclient.posts.filter(blog=12, status=1)  # GET /posts/?blog=12&status=1

.get(**kwargs)

A special case of .filter().

If kwargs contains id, pk, slug or username, that value will be used in the URL path, in that order.

Otherwise, it calls a GET with kwargs as querystring values.

If the returned list is empty, will raise ResourceNotFound.

If the returned list contains more than 1 resource, will raise MultipleResourcesFound

Note that .get() will return a Resource, not a list of Resource s

myclient.posts.filter(blog=12, status=1)  # GET /posts/?blog=12&status=1
myclient.posts.filter(id=12)  # GET /posts/12/
myclient.posts.filter(slug='12-ways-clickbait')  # GET /posts/12-ways-clickbait/

.create(payload)

Will result in a POST, with payload (a dict) as the request’s body, returning a new Resource:

post = myclient.posts.create({'blog': 12, 'status': 1})  # POST /posts/

.get_or_create(defaults, **kwargs)

Issues a GET to fetch the resource. If the resource is not found, issues a POST to create the resource:

# Assuming it doesn't exist
post = myclient.posts.get_or_update(slug='my-post', defaults={'status': 1})  # GET /posts/my-post/, then POST /posts/

.create_or_update(payload)

If payload contains a key called 'id', will issue a PUT. If the server returns a 400 error, a PATCH request will be re-issued. If payload` does not contains 'id', it will issue a POST:

post = myclient.posts.create_or_update({'status': 1})  # POST /posts/
post = myclient.posts.create_or_update({'id': 1234, 'status': 1})  # PUT /posts/1234/

post = myclient.posts.create_or_update({'id': 1234})  # PUT /posts/1234/
# <- server returns 400
# -> PATCH /posts/1234/

.delete(pk)

Will issue a DELETE, and will use pk as part of the URL:

myclient.posts.delete(24)  # DELETE /posts/24/

Resources

All endpoints methods (with the exception of .delete()) return either a Resource or a list of Resource s.

A Resource is just a wrapping class for a dict, where keys can be accessed as properties.

Additionally, Resource s have a special property called .payload, which contains the original payload received from the server.

Resource s have the following methods:

Resource.delete() will result in a DELETE, with Resource.id as par of the URL:

blog = myclient.posts.create({'blog': 12, 'status': 1})  # POST /posts/
blog.delete()  # DELETE /blog/345/ -- the ID 345 was returned by the server in the previous response

Resource.save() will result in a PUT, with Resource.id as par of the URL. If the server returns a 400 error, a PATCH request will be re-issued:

post = myclient.posts.create({'blog': 12, 'status': 1})  # POST /posts/
post.status = 2
post.save()  # PUT /posts/345/

post = Resource(id=345, status=1)
post.save()  # PUT /posts/345/
# <- server returns 400
# -> PATCH /posts/345/

ResourceSets

Whenever a method returns a list of Resources, they list will be wrapped in a ResultSet.

A ResultSet is a just a list object, with the addition of a .response containing the original response from the server.

Routes

If your API has some non-RESTful calls within the main endpoints (sometimes referred as detail_route and list_route), you can use genericclient to call them:

myclient.posts(id=123).publish(date=tomorrow)
myclient.blogs().ping()

Routes http calls use POST by default, but you can specify something else by using the _method argument:

myclient.posts(_method='get', id=123).pingbacks()
myclient.blogs(_method='get').visits()

Note that this calls will return an instance of genericclient.ParsedResponse, instead of instances of genericclient.Resource,

License

Licensed under the MIT License.

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