superset api 源码
superset api 代码
文件路径:/superset/charts/data/api.py
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations
import json
import logging
from typing import Any, Dict, Optional, TYPE_CHECKING
import simplejson
from flask import current_app, make_response, request, Response
from flask_appbuilder.api import expose, protect
from flask_babel import gettext as _
from marshmallow import ValidationError
from superset import is_feature_enabled, security_manager
from superset.charts.api import ChartRestApi
from superset.charts.commands.exceptions import (
ChartDataCacheLoadError,
ChartDataQueryFailedError,
)
from superset.charts.data.commands.create_async_job_command import (
CreateAsyncChartDataJobCommand,
)
from superset.charts.data.commands.get_data_command import ChartDataCommand
from superset.charts.data.query_context_cache_loader import QueryContextCacheLoader
from superset.charts.post_processing import apply_post_process
from superset.charts.schemas import ChartDataQueryContextSchema
from superset.common.chart_data import ChartDataResultFormat, ChartDataResultType
from superset.connectors.base.models import BaseDatasource
from superset.exceptions import QueryObjectValidationError
from superset.extensions import event_logger
from superset.utils.async_query_manager import AsyncQueryTokenException
from superset.utils.core import create_zip, get_user_id, json_int_dttm_ser
from superset.views.base import CsvResponse, generate_download_headers
from superset.views.base_api import statsd_metrics
if TYPE_CHECKING:
from superset.common.query_context import QueryContext
logger = logging.getLogger(__name__)
class ChartDataRestApi(ChartRestApi):
include_route_methods = {"get_data", "data", "data_from_cache"}
@expose("/<int:pk>/data/", methods=["GET"])
@protect()
@statsd_metrics
@event_logger.log_this_with_context(
action=lambda self, *args, **kwargs: f"{self.__class__.__name__}.data",
log_to_statsd=False,
)
def get_data(self, pk: int) -> Response:
"""
Takes a chart ID and uses the query context stored when the chart was saved
to return payload data response.
---
get:
description: >-
Takes a chart ID and uses the query context stored when the chart was saved
to return payload data response.
parameters:
- in: path
schema:
type: integer
name: pk
description: The chart ID
- in: query
name: format
description: The format in which the data should be returned
schema:
type: string
- in: query
name: type
description: The type in which the data should be returned
schema:
type: string
responses:
200:
description: Query result
content:
application/json:
schema:
$ref: "#/components/schemas/ChartDataResponseSchema"
202:
description: Async job details
content:
application/json:
schema:
$ref: "#/components/schemas/ChartDataAsyncResponseSchema"
400:
$ref: '#/components/responses/400'
401:
$ref: '#/components/responses/401'
500:
$ref: '#/components/responses/500'
"""
chart = self.datamodel.get(pk, self._base_filters)
if not chart:
return self.response_404()
try:
json_body = json.loads(chart.query_context)
except (TypeError, json.decoder.JSONDecodeError):
json_body = None
if json_body is None:
return self.response_400(
message=_(
"Chart has no query context saved. Please save the chart again."
)
)
# override saved query context
json_body["result_format"] = request.args.get(
"format", ChartDataResultFormat.JSON
)
json_body["result_type"] = request.args.get("type", ChartDataResultType.FULL)
try:
query_context = self._create_query_context_from_form(json_body)
command = ChartDataCommand(query_context)
command.validate()
except QueryObjectValidationError as error:
return self.response_400(message=error.message)
except ValidationError as error:
return self.response_400(
message=_(
"Request is incorrect: %(error)s", error=error.normalized_messages()
)
)
# TODO: support CSV, SQL query and other non-JSON types
if (
is_feature_enabled("GLOBAL_ASYNC_QUERIES")
and query_context.result_format == ChartDataResultFormat.JSON
and query_context.result_type == ChartDataResultType.FULL
):
return self._run_async(json_body, command)
try:
form_data = json.loads(chart.params)
except (TypeError, json.decoder.JSONDecodeError):
form_data = {}
return self._get_data_response(
command=command, form_data=form_data, datasource=query_context.datasource
)
@expose("/data", methods=["POST"])
@protect()
@statsd_metrics
@event_logger.log_this_with_context(
action=lambda self, *args, **kwargs: f"{self.__class__.__name__}.data",
log_to_statsd=False,
)
def data(self) -> Response:
"""
Takes a query context constructed in the client and returns payload
data response for the given query.
---
post:
description: >-
Takes a query context constructed in the client and returns payload data
response for the given query.
requestBody:
description: >-
A query context consists of a datasource from which to fetch data
and one or many query objects.
required: true
content:
application/json:
schema:
$ref: "#/components/schemas/ChartDataQueryContextSchema"
responses:
200:
description: Query result
content:
application/json:
schema:
$ref: "#/components/schemas/ChartDataResponseSchema"
202:
description: Async job details
content:
application/json:
schema:
$ref: "#/components/schemas/ChartDataAsyncResponseSchema"
400:
$ref: '#/components/responses/400'
401:
$ref: '#/components/responses/401'
500:
$ref: '#/components/responses/500'
"""
json_body = None
if request.is_json:
json_body = request.json
elif request.form.get("form_data"):
# CSV export submits regular form data
try:
json_body = json.loads(request.form["form_data"])
except (TypeError, json.JSONDecodeError):
pass
if json_body is None:
return self.response_400(message=_("Request is not JSON"))
try:
query_context = self._create_query_context_from_form(json_body)
command = ChartDataCommand(query_context)
command.validate()
except QueryObjectValidationError as error:
return self.response_400(message=error.message)
except ValidationError as error:
return self.response_400(
message=_(
"Request is incorrect: %(error)s", error=error.normalized_messages()
)
)
# TODO: support CSV, SQL query and other non-JSON types
if (
is_feature_enabled("GLOBAL_ASYNC_QUERIES")
and query_context.result_format == ChartDataResultFormat.JSON
and query_context.result_type == ChartDataResultType.FULL
):
return self._run_async(json_body, command)
form_data = json_body.get("form_data")
return self._get_data_response(
command, form_data=form_data, datasource=query_context.datasource
)
@expose("/data/<cache_key>", methods=["GET"])
@protect()
@statsd_metrics
@event_logger.log_this_with_context(
action=lambda self, *args, **kwargs: f"{self.__class__.__name__}"
f".data_from_cache",
log_to_statsd=False,
)
def data_from_cache(self, cache_key: str) -> Response:
"""
Takes a query context cache key and returns payload
data response for the given query.
---
get:
description: >-
Takes a query context cache key and returns payload data
response for the given query.
parameters:
- in: path
schema:
type: string
name: cache_key
responses:
200:
description: Query result
content:
application/json:
schema:
$ref: "#/components/schemas/ChartDataResponseSchema"
400:
$ref: '#/components/responses/400'
401:
$ref: '#/components/responses/401'
404:
$ref: '#/components/responses/404'
422:
$ref: '#/components/responses/422'
500:
$ref: '#/components/responses/500'
"""
try:
cached_data = self._load_query_context_form_from_cache(cache_key)
query_context = self._create_query_context_from_form(cached_data)
command = ChartDataCommand(query_context)
command.validate()
except ChartDataCacheLoadError:
return self.response_404()
except ValidationError as error:
return self.response_400(
message=_("Request is incorrect: %(error)s", error=error.messages)
)
return self._get_data_response(command, True)
def _run_async(
self, form_data: Dict[str, Any], command: ChartDataCommand
) -> Response:
"""
Execute command as an async query.
"""
# First, look for the chart query results in the cache.
result = None
try:
result = command.run(force_cached=True)
if result is not None:
return self._send_chart_response(result)
except ChartDataCacheLoadError:
pass
# Otherwise, kick off a background job to run the chart query.
# Clients will either poll or be notified of query completion,
# at which point they will call the /data/<cache_key> endpoint
# to retrieve the results.
async_command = CreateAsyncChartDataJobCommand()
try:
async_command.validate(request)
except AsyncQueryTokenException:
return self.response_401()
result = async_command.run(form_data, get_user_id())
return self.response(202, **result)
def _send_chart_response(
self,
result: Dict[Any, Any],
form_data: Optional[Dict[str, Any]] = None,
datasource: Optional[BaseDatasource] = None,
) -> Response:
result_type = result["query_context"].result_type
result_format = result["query_context"].result_format
# Post-process the data so it matches the data presented in the chart.
# This is needed for sending reports based on text charts that do the
# post-processing of data, eg, the pivot table.
if result_type == ChartDataResultType.POST_PROCESSED:
result = apply_post_process(result, form_data, datasource)
if result_format == ChartDataResultFormat.CSV:
# Verify user has permission to export CSV file
if not security_manager.can_access("can_csv", "Superset"):
return self.response_403()
if not result["queries"]:
return self.response_400(_("Empty query result"))
if len(result["queries"]) == 1:
# return single query results csv format
data = result["queries"][0]["data"]
return CsvResponse(data, headers=generate_download_headers("csv"))
# return multi-query csv results bundled as a zip file
encoding = current_app.config["CSV_EXPORT"].get("encoding", "utf-8")
files = {
f"query_{idx + 1}.csv": result["data"].encode(encoding)
for idx, result in enumerate(result["queries"])
}
return Response(
create_zip(files),
headers=generate_download_headers("zip"),
mimetype="application/zip",
)
if result_format == ChartDataResultFormat.JSON:
response_data = simplejson.dumps(
{"result": result["queries"]},
default=json_int_dttm_ser,
ignore_nan=True,
)
resp = make_response(response_data, 200)
resp.headers["Content-Type"] = "application/json; charset=utf-8"
return resp
return self.response_400(message=f"Unsupported result_format: {result_format}")
def _get_data_response(
self,
command: ChartDataCommand,
force_cached: bool = False,
form_data: Optional[Dict[str, Any]] = None,
datasource: Optional[BaseDatasource] = None,
) -> Response:
try:
result = command.run(force_cached=force_cached)
except ChartDataCacheLoadError as exc:
return self.response_422(message=exc.message)
except ChartDataQueryFailedError as exc:
return self.response_400(message=exc.message)
return self._send_chart_response(result, form_data, datasource)
# pylint: disable=invalid-name, no-self-use
def _load_query_context_form_from_cache(self, cache_key: str) -> Dict[str, Any]:
return QueryContextCacheLoader.load(cache_key)
# pylint: disable=no-self-use
def _create_query_context_from_form(
self, form_data: Dict[str, Any]
) -> QueryContext:
try:
return ChartDataQueryContextSchema().load(form_data)
except KeyError as ex:
raise ValidationError("Request is incorrect") from ex
except ValidationError as error:
raise error
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