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import marshmallow as ma
from pyramid.config import Configurator
from pyramid.httpexceptions import HTTPBadRequest
from webargs import fields, validate
from webargs.core import json
from webargs.pyramidparser import parser, use_args, use_kwargs
hello_args = {"name": fields.Str(load_default="World", validate=validate.Length(min=3))}
hello_multiple = {"name": fields.List(fields.Str())}
class HelloSchema(ma.Schema):
name = fields.Str(load_default="World", validate=validate.Length(min=3))
hello_many_schema = HelloSchema(many=True)
# variant which ignores unknown fields
hello_exclude_schema = HelloSchema(unknown=ma.EXCLUDE)
def echo(request):
return parser.parse(hello_args, request, location="query")
def echo_form(request):
return parser.parse(hello_args, request, location="form")
def echo_json(request):
try:
return parser.parse(hello_args, request, location="json")
except json.JSONDecodeError as err:
error = HTTPBadRequest()
error.body = json.dumps(["Invalid JSON."]).encode("utf-8")
error.content_type = "application/json"
raise error from err
def echo_json_or_form(request):
try:
return parser.parse(hello_args, request, location="json_or_form")
except json.JSONDecodeError as err:
error = HTTPBadRequest()
error.body = json.dumps(["Invalid JSON."]).encode("utf-8")
error.content_type = "application/json"
raise error from err
def echo_json_ignore_extra_data(request):
try:
return parser.parse(hello_exclude_schema, request, unknown=None)
except json.JSONDecodeError as err:
error = HTTPBadRequest()
error.body = json.dumps(["Invalid JSON."]).encode("utf-8")
error.content_type = "application/json"
raise error from err
def echo_query(request):
return parser.parse(hello_args, request, location="query")
@use_args(hello_args, location="query")
def echo_use_args(request, args):
return args
@use_args(
{"value": fields.Int()}, validate=lambda args: args["value"] > 42, location="form"
)
def echo_use_args_validated(request, args):
return args
@use_kwargs(hello_args, location="query")
def echo_use_kwargs(request, name):
return {"name": name}
def echo_multi(request):
return parser.parse(hello_multiple, request, location="query")
def echo_multi_form(request):
return parser.parse(hello_multiple, request, location="form")
def echo_multi_json(request):
return parser.parse(hello_multiple, request)
def echo_many_schema(request):
return parser.parse(hello_many_schema, request)
@use_args({"value": fields.Int()}, location="query")
def echo_use_args_with_path_param(request, args):
return args
@use_kwargs({"value": fields.Int()}, location="query")
def echo_use_kwargs_with_path_param(request, value):
return {"value": value}
def always_error(request):
def always_fail(value):
raise ma.ValidationError("something went wrong")
argmap = {"text": fields.Str(validate=always_fail)}
return parser.parse(argmap, request)
def echo_headers(request):
return parser.parse(hello_args, request, location="headers")
def echo_cookie(request):
return parser.parse(hello_args, request, location="cookies")
def echo_file(request):
args = {"myfile": fields.Raw()}
result = parser.parse(args, request, location="files")
myfile = result["myfile"]
content = myfile.file.read().decode("utf8")
return {"myfile": content}
def echo_nested(request):
argmap = {"name": fields.Nested({"first": fields.Str(), "last": fields.Str()})}
return parser.parse(argmap, request)
def echo_nested_many(request):
argmap = {
"users": fields.Nested({"id": fields.Int(), "name": fields.Str()}, many=True)
}
return parser.parse(argmap, request)
def echo_matchdict(request):
return parser.parse({"mymatch": fields.Int()}, request, location="matchdict")
class EchoCallable:
def __init__(self, request):
self.request = request
@use_args({"value": fields.Int()}, location="query")
def __call__(self, args):
return args
def add_route(config, route, view, route_name=None, renderer="json"):
"""Helper for adding a new route-view pair."""
route_name = route_name or view.__name__
config.add_route(route_name, route)
config.add_view(view, route_name=route_name, renderer=renderer)
def create_app():
config = Configurator()
add_route(config, "/echo", echo)
add_route(config, "/echo_form", echo_form)
add_route(config, "/echo_json", echo_json)
add_route(config, "/echo_json_or_form", echo_json_or_form)
add_route(config, "/echo_query", echo_query)
add_route(config, "/echo_ignoring_extra_data", echo_json_ignore_extra_data)
add_route(config, "/echo_use_args", echo_use_args)
add_route(config, "/echo_use_args_validated", echo_use_args_validated)
add_route(config, "/echo_use_kwargs", echo_use_kwargs)
add_route(config, "/echo_multi", echo_multi)
add_route(config, "/echo_multi_form", echo_multi_form)
add_route(config, "/echo_multi_json", echo_multi_json)
add_route(config, "/echo_many_schema", echo_many_schema)
add_route(
config, "/echo_use_args_with_path_param/{name}", echo_use_args_with_path_param
)
add_route(
config,
"/echo_use_kwargs_with_path_param/{name}",
echo_use_kwargs_with_path_param,
)
add_route(config, "/error", always_error)
add_route(config, "/echo_headers", echo_headers)
add_route(config, "/echo_cookie", echo_cookie)
add_route(config, "/echo_file", echo_file)
add_route(config, "/echo_nested", echo_nested)
add_route(config, "/echo_nested_many", echo_nested_many)
add_route(config, "/echo_callable", EchoCallable)
add_route(config, "/echo_matchdict/{mymatch}", echo_matchdict)
return config.make_wsgi_app()
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