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Merge pull request #10 from core-api/version-1-1
Version 1.1
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‎README.md

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[![travis-image]][travis]
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[![pypi-image]][pypi]
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## Introduction
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This is a Python [Core API][coreapi] codec for the [Open API][openapi] schema format, also known as "Swagger".
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## Installation
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Install using pip:
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$ pip install openapi-codec
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## Creating Swagger schemas
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To create a swagger schema from a `coreapi.Document`, use the codec directly.
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>>> from openapi_codec import OpenAPICodec
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>>> codec = OpenAPICodec()
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>>> schema = codec.encode(document)
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## Using with the Python Client Library
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To use the Python client library to interact with a service that exposes a Swagger schema,
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include the codec in [the `decoders` argument][decoders].
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>>> from openapi_codec import OpenAPICodec
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>>> from coreapi.codecs import JSONCodec
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>>> from coreapi import Client
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>>> decoders = [OpenAPICodec(), JSONCodec()]
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>>> client = Client(decoders=decoders)
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If the server exposes the schema without properly using an `application/openapi+json` content type, then you'll need to make sure to include `format='openapi'` on the initial request,
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to force the correct codec to be used.
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>>> schema = client.get('http://petstore.swagger.io/v2/swagger.json', format='openapi')
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At this point you can now start to interact with the API:
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>>> client.action(schema, ['pet', 'addPet'], params={'photoUrls': [], 'name': 'fluffy'})
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## Using with the Command Line Client
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Once the `openapi-codec` package is installed, the codec will automatically become available to the command line client.
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$ pip install coreapi-cli openapi-codec
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$ coreapi codecs show
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Codec name Media type Support Package
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corejson | application/coreapi+json | encoding, decoding | coreapi==2.0.7
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openapi | application/openapi+json | encoding, decoding | openapi-codec==1.1.0
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json | application/json | decoding | coreapi==2.0.7
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text | text/* | decoding | coreapi==2.0.7
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download | */* | decoding | coreapi==2.0.7
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If the server exposes the schema without properly using an `application/openapi+json` content type, then you'll need to make sure to include `format=openapi` on the initial request, to force the correct codec to be used.
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$ coreapi get http://petstore.swagger.io/v2/swagger.json --format openapi
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<Swagger Petstore "http://petstore.swagger.io/v2/swagger.json">
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pet: {
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addPet(photoUrls, name, [status], [id], [category], [tags])
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deletePet(petId, [api_key])
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findPetsByStatus(status)
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...
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At this point you can start to interact with the API.
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$ coreapi action pet addPet --param name=fluffy --param photoUrls=[]
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{
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"id": 201609262739,
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"name": "fluffy",
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"photoUrls": [],
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"tags": []
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}
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Use the `--debug` flag to see the full HTTP request and response.
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$ coreapi action pet addPet --param name=fluffy --param photoUrls=[] --debug
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> POST /v2/pet HTTP/1.1
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> Accept-Encoding: gzip, deflate
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> Connection: keep-alive
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> Content-Length: 35
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> Content-Type: application/json
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> Accept: application/coreapi+json, */*
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> Host: petstore.swagger.io
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> User-Agent: coreapi
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>
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> {"photoUrls": [], "name": "fluffy"}
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< 200 OK
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< Access-Control-Allow-Headers: Content-Type, api_key, Authorization
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< Access-Control-Allow-Methods: GET, POST, DELETE, PUT
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< Access-Control-Allow-Origin: *
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< Connection: close
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< Content-Type: application/json
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< Date: Mon, 26 Sep 2016 13:17:33 GMT
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< Server: Jetty(9.2.9.v20150224)
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<
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< {"id":201609262739,"name":"fluffy","photoUrls":[],"tags":[]}
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{
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"id": 201609262739,
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"name": "fluffy",
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"photoUrls": [],
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"tags": []
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}
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[travis-image]: https://secure.travis-ci.org/core-api/python-openapi-codec.svg?branch=master
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[travis]: http://travis-ci.org/core-api/python-openapi-codec?branch=master
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[pypi-image]: https://img.shields.io/pypi/v/openapi-codec.svg
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[pypi]: https://pypi.python.org/pypi/openapi-codec
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[coreapi]: http://www.coreapi.org/
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[openapi]: https://openapis.org/
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[decoders]: http://core-api.github.io/python-client/api-guide/client/#instantiating-a-client

‎openapi_codec/__init__.py

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from openapi_codec.decode import _parse_document
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__version__ = "1.0.0"
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__version__ = '1.1.0'
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class OpenAPICodec(BaseCodec):
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media_type = "application/openapi+json"
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supports = ['encoding', 'decoding']
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media_type = 'application/openapi+json'
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format = 'openapi'
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def load(self, bytes, base_url=None):
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def decode(self, bytes, **options):
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"""
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Takes a bytestring and returns a document.
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"""
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except ValueError as exc:
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raise ParseError('Malformed JSON. %s' % exc)
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base_url = options.get('base_url')
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doc = _parse_document(data, base_url)
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if not isinstance(doc, Document):
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raise ParseError('Top level node must be a document.')
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return doc
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def dump(self, document, **kwargs):
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def encode(self, document, **options):
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if not isinstance(document, Document):
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raise TypeError('Expected a `coreapi.Document` instance')
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data = generate_swagger_object(document)
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return force_bytes(json.dumps(data))

‎openapi_codec/decode.py

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@@ -8,10 +8,11 @@ def _parse_document(data, base_url=None):
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base_url = _get_document_base_url(data, base_url)
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info = _get_dict(data, 'info')
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title = _get_string(info, 'title')
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consumes = get_strings(_get_list(data, 'consumes'))
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paths = _get_dict(data, 'paths')
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content = {}
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for path in paths.keys():
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url = urlparse.urljoin(base_url, path.lstrip('/'))
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url = base_url + path.lstrip('/')
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spec = _get_dict(paths, path)
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default_parameters = get_dicts(_get_list(spec, 'parameters'))
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for action in spec.keys():
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continue
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operation = _get_dict(spec, action)
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link_description = _get_string(operation, 'description')
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link_consumes = get_strings(_get_list(operation, 'consumes', consumes))
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# Determine any fields on the link.
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has_body = False
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has_form = False
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fields = []
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parameters = get_dicts(_get_list(operation, 'parameters', default_parameters), dereference_using=data)
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for parameter in parameters:
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required = _get_bool(parameter, 'required', default=(location == 'path'))
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description = _get_string(parameter, 'description')
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if location == 'body':
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has_body = True
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schema = _get_dict(parameter, 'schema', dereference_using=data)
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expanded = _expand_schema(schema)
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if expanded is not None:
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expanded_fields = [
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Field(name=field_name, location='form', required=is_required, description=description)
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for field_name, is_required in expanded
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if not any([field.name == name for field in fields])
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Field(name=field_name, location='form', required=is_required, description=field_description)
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for field_name, is_required, field_description in expanded
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if not any([field.name == field_name for field in fields])
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]
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fields += expanded_fields
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else:
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field = Field(name=name, location='body', required=True, description=description)
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field = Field(name=name, location='body', required=required, description=description)
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fields.append(field)
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else:
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if location == 'formData':
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has_form = True
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location = 'form'
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field = Field(name=name, location=location, required=required, description=description)
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fields.append(field)
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link = Link(url=url, action=action, fields=fields)
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encoding = ''
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if has_body:
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encoding = _select_encoding(link_consumes)
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elif has_form:
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encoding = _select_encoding(link_consumes, form=True)
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link = Link(url=url, action=action, encoding=encoding, fields=fields, description=link_description)
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# Add the link to the document content.
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tags = get_strings(_get_list(operation, 'tags'))
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operation_id = _get_string(operation, 'operationId')
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if tags:
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for tag in tags:
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if tag not in content:
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content[tag] = {}
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content[tag][operation_id] = link
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tag = tags[0]
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prefix = tag + '_'
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if operation_id.startswith(prefix):
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operation_id = operation_id[len(prefix):]
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if tag not in content:
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content[tag] = {}
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content[tag][operation_id] = link
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else:
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content[operation_id] = link
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Get the base url to use when constructing absolute paths from the
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relative ones provided in the schema defination.
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"""
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prefered_schemes = ['http', 'https']
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prefered_schemes = ['https', 'http']
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if base_url:
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url_components = urlparse.urlparse(base_url)
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default_host = url_components.netloc
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host = _get_string(data, 'host', default=default_host)
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path = _get_string(data, 'basePath', default='/')
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path = '/' + path.lstrip('/')
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path = path.rstrip('/') + '/'
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if not host:
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# No host is provided, and we do not have an initial URL.
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return path.strip('/') + '/'
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return path
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schemes = _get_list(data, 'schemes')
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else:
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raise ParseError('Unsupported transport schemes "%s"' % schemes)
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return '%s://%s/%s/' % (scheme, host, path.strip('/'))
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return '%s://%s%s' % (scheme, host, path)
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def _select_encoding(consumes, form=False):
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"""
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Given an OpenAPI 'consumes' list, return a single 'encoding' for CoreAPI.
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"""
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if form:
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preference = [
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'multipart/form-data',
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'application/x-www-form-urlencoded',
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'application/json'
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]
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else:
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preference = [
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'application/json',
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'multipart/form-data',
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'application/x-www-form-urlencoded',
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'application/octet-stream'
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]
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if not consumes:
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return preference[0]
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for media_type in preference:
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if media_type in consumes:
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return media_type
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return consumes[0]
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def _expand_schema(schema):
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schema_required = _get_list(schema, 'required')
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if ((schema_type == ['object']) or (schema_type == 'object')) and schema_properties:
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return [
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(key, key in schema_required)
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(key, key in schema_required, schema_properties[key].get('description'))
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for key in schema_properties.keys()
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]
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return None

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