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# Copyright (c) Alibaba, Inc. and its affiliates.
import datetime
import json
import ssl
from http import HTTPStatus
from typing import Optional, Dict, Union
import aiohttp
import certifi
import requests
from dashscope.api_entities.base_request import AioBaseRequest
from dashscope.api_entities.dashscope_response import DashScopeAPIResponse
from dashscope.common.constants import (
DEFAULT_REQUEST_TIMEOUT_SECONDS,
SSE_CONTENT_TYPE,
HTTPMethod,
)
from dashscope.common.error import UnsupportedHTTPMethod
from dashscope.common.logging import logger
from dashscope.common.utils import (
_handle_aio_stream,
_handle_aiohttp_failed_response,
_handle_http_failed_response,
_handle_stream,
)
from dashscope.api_entities.encryption import Encryption
class HttpRequest(AioBaseRequest):
def __init__(
self,
url: str,
api_key: str,
http_method: str,
stream: bool = True,
async_request: bool = False,
query: bool = False,
timeout: int = DEFAULT_REQUEST_TIMEOUT_SECONDS,
task_id: str = None,
flattened_output: bool = False,
encryption: Optional[Encryption] = None,
user_agent: str = "",
session: Optional[
Union[requests.Session, aiohttp.ClientSession]
] = None,
) -> None:
"""HttpSSERequest, processing http server sent event stream.
Args:
url (str): The request url.
api_key (str): The api key.
method (str): The http method(GET|POST).
stream (bool, optional): Is stream request. Defaults to True.
timeout (int, optional): Total request timeout.
Defaults to DEFAULT_REQUEST_TIMEOUT_SECONDS.
user_agent (str, optional): Additional user agent string to
append. Defaults to ''.
session (Optional[Union[requests.Session,
aiohttp.ClientSession]], optional):
Custom Session for connection reuse. Can be either
requests.Session for sync calls or aiohttp.ClientSession
for async calls. Defaults to None.
"""
super().__init__(user_agent=user_agent)
self.url = url
self.flattened_output = flattened_output
self.async_request = async_request
self.encryption = encryption
# Auto-detect session type and store accordingly
if session is not None:
session_type = type(session).__name__
session_module = type(session).__module__
# Check if it's an aiohttp ClientSession
if (
session_type == "ClientSession" and "aiohttp" in session_module
) or isinstance(session, aiohttp.ClientSession):
self._external_session = None
self._external_aio_session = session
else:
# Treat as requests Session
self._external_session = session
self._external_aio_session = None
else:
self._external_session = None
self._external_aio_session = None
self.headers: Dict = {
"Accept": "application/json",
"Authorization": f"Bearer {api_key}",
**self.headers,
}
if encryption and encryption.is_valid():
self.headers = {
"X-DashScope-EncryptionKey": json.dumps(
{
"public_key_id": encryption.get_pub_key_id(),
"encrypt_key": encryption.get_encrypted_aes_key_str(),
"iv": encryption.get_base64_iv_str(),
},
),
**self.headers,
}
self.query = query
if self.async_request and self.query is False:
self.headers = {
"X-DashScope-Async": "enable",
**self.headers,
}
self.method = http_method
if self.method == HTTPMethod.POST:
self.headers["Content-Type"] = "application/json"
self.stream = stream
if self.stream:
self.headers["Accept"] = SSE_CONTENT_TYPE
self.headers["X-Accel-Buffering"] = "no"
self.headers["X-DashScope-SSE"] = "enable"
if self.query:
self.url = self.url.replace("api", "api-task")
self.url += f"{task_id}"
if timeout is None:
self.timeout = DEFAULT_REQUEST_TIMEOUT_SECONDS
else:
self.timeout = timeout # type: ignore[has-type]
def add_header(self, key, value):
self.headers[key] = value
def add_headers(self, headers):
self.headers = {**self.headers, **headers}
def call(self):
response = self._handle_request()
if self.stream:
return (item for item in response)
else:
output = next(response)
try:
next(response)
except StopIteration:
pass
return output
async def aio_call(self):
response = self._handle_aio_request()
if self.stream:
return (item async for item in response)
else:
result = await response.__anext__()
try:
await response.__anext__()
except StopAsyncIteration:
pass
return result
async def _handle_aio_request(self): # pylint: disable=too-many-branches
try:
# Use external aio_session if provided,
# otherwise create temporary session
if self._external_aio_session is not None:
session = self._external_aio_session
should_close = False
else:
connector = aiohttp.TCPConnector(
ssl=ssl.create_default_context(
cafile=certifi.where(),
),
)
session = aiohttp.ClientSession(
connector=connector,
timeout=aiohttp.ClientTimeout(total=self.timeout),
headers=self.headers,
)
should_close = True
try:
logger.debug("Starting request: %s", self.url)
if self.method == HTTPMethod.POST:
is_form, obj = False, {}
if hasattr(self, "data") and self.data is not None:
is_form, obj = self.data.get_aiohttp_payload()
if is_form:
headers = {**self.headers, **obj.headers}
response = await session.post(
url=self.url,
data=obj,
headers=headers,
)
else:
response = await session.request(
"POST",
url=self.url,
json=obj,
headers=self.headers,
)
elif self.method == HTTPMethod.GET:
# 添加条件判断
params = {}
if hasattr(self, "data") and self.data is not None:
params = getattr(self.data, "parameters", {})
if params:
params = self.__handle_parameters(params)
response = await session.get(
url=self.url,
params=params,
headers=self.headers,
)
else:
raise UnsupportedHTTPMethod(
f"Unsupported http method: {self.method}",
)
logger.debug("Response returned: %s", self.url)
async with response:
async for rsp in self._handle_aio_response(response):
yield rsp
finally:
# Only close if we created the session
if should_close:
await session.close()
except aiohttp.ClientConnectorError as e:
logger.error(e)
raise e
except BaseException as e:
logger.error(e)
raise e
@staticmethod
def __handle_parameters(params: dict) -> dict:
# pylint: disable=too-many-return-statements
def __format(value):
if isinstance(value, bool):
return str(value).lower()
elif isinstance(value, (str, int, float)):
return value
elif value is None:
return ""
elif isinstance(value, (datetime.datetime, datetime.date)):
return value.isoformat()
elif isinstance(value, (list, tuple)):
return ",".join(str(__format(x)) for x in value)
elif isinstance(value, dict):
return json.dumps(value)
else:
try:
return str(value)
except Exception as e:
# pylint: disable=raise-missing-from
raise ValueError(
f"Unsupported type {type(value)} for param formatting: {e}", # noqa: E501
)
formatted = {}
for k, v in params.items():
formatted[k] = __format(v)
# pylint: disable=too-many-statements
return formatted
async def _handle_aio_response( # pylint: disable=too-many-branches, too-many-statements # noqa: E501
self,
response: aiohttp.ClientResponse,
):
request_id = ""
if (
response.status == HTTPStatus.OK
and self.stream
and SSE_CONTENT_TYPE in response.content_type
):
async for is_error, status_code, data in _handle_aio_stream(
response,
):
try:
output = None
usage = None
msg = json.loads(data)
if not is_error:
if "output" in msg:
output = msg["output"]
if "usage" in msg:
usage = msg["usage"]
if "request_id" in msg:
request_id = msg["request_id"]
except json.JSONDecodeError:
yield DashScopeAPIResponse(
request_id=request_id,
status_code=HTTPStatus.INTERNAL_SERVER_ERROR,
code="Unknown",
message=data,
)
continue
if is_error:
yield DashScopeAPIResponse(
request_id=request_id,
status_code=status_code,
code=msg["code"],
message=msg["message"],
)
else:
if self.encryption and self.encryption.is_valid():
output = self.encryption.decrypt(output)
yield DashScopeAPIResponse(
request_id=request_id,
status_code=HTTPStatus.OK,
output=output,
usage=usage,
)
elif (
response.status == HTTPStatus.OK
and "multipart" in response.content_type
):
reader = aiohttp.MultipartReader.from_response(response)
output = {}
while True:
part = await reader.next()
if part is None:
# pylint: disable=consider-using-get
break
output[part.name] = await part.read()
if "request_id" in output: # pylint: disable=consider-using-get
request_id = output["request_id"]
if self.encryption and self.encryption.is_valid():
output = self.encryption.decrypt(output)
yield DashScopeAPIResponse(
request_id=request_id,
status_code=HTTPStatus.OK,
output=output,
)
elif response.status == HTTPStatus.OK:
json_content = await response.json()
output = None
usage = None
if "output" in json_content and json_content["output"] is not None:
output = json_content["output"]
# Compatible with wan
elif (
"data" in json_content
and json_content["data"] is not None
and isinstance(json_content["data"], list)
and len(json_content["data"]) > 0
and "task_id" in json_content["data"][0]
):
output = json_content
if "usage" in json_content:
usage = json_content["usage"]
if "request_id" in json_content:
request_id = json_content["request_id"]
if self.encryption and self.encryption.is_valid():
output = self.encryption.decrypt(output)
yield DashScopeAPIResponse(
request_id=request_id,
status_code=HTTPStatus.OK,
output=output,
usage=usage,
)
else:
yield await _handle_aiohttp_failed_response(response)
def _handle_response( # pylint: disable=too-many-branches
self,
response: requests.Response,
):
request_id = ""
if (
response.status_code == HTTPStatus.OK
and self.stream
and SSE_CONTENT_TYPE
in response.headers.get(
"content-type",
"",
)
):
for is_error, status_code, event in _handle_stream(response):
try:
data = event.data
output = None
usage = None
msg = json.loads(data)
logger.debug("Stream message: %s", msg)
if not is_error:
if "output" in msg:
output = msg["output"]
if "usage" in msg:
usage = msg["usage"]
if "request_id" in msg:
request_id = msg["request_id"]
except json.JSONDecodeError:
yield DashScopeAPIResponse(
request_id=request_id,
status_code=HTTPStatus.BAD_REQUEST,
output=None,
code="Unknown",
message=data,
)
continue
if is_error:
yield DashScopeAPIResponse(
request_id=request_id,
status_code=status_code,
output=None,
code=msg["code"]
if "code" in msg
else None, # noqa E501
message=msg["message"] if "message" in msg else None,
) # noqa E501
else:
if self.flattened_output:
yield msg
else:
if self.encryption and self.encryption.is_valid():
output = self.encryption.decrypt(output)
yield DashScopeAPIResponse(
request_id=request_id,
status_code=HTTPStatus.OK,
output=output,
usage=usage,
)
elif response.status_code == HTTPStatus.OK:
json_content = response.json()
logger.debug("Response: %s", json_content)
output = None
usage = None
if "task_id" in json_content:
output = {"task_id": json_content["task_id"]}
if "output" in json_content:
output = json_content["output"]
if "usage" in json_content:
usage = json_content["usage"]
if "request_id" in json_content:
request_id = json_content["request_id"]
if self.flattened_output:
yield json_content
else:
if self.encryption and self.encryption.is_valid():
output = self.encryption.decrypt(output)
yield DashScopeAPIResponse(
request_id=request_id,
status_code=HTTPStatus.OK,
output=output,
usage=usage,
)
else:
yield _handle_http_failed_response(response)
def _handle_request(self):
try:
# Use external session if provided,
# otherwise create temporary session
if self._external_session is not None:
session = self._external_session
should_close = False
else:
session = requests.Session()
should_close = True
try:
if self.method == HTTPMethod.POST:
is_form, form, obj = self.data.get_http_payload()
if is_form:
headers = {**self.headers}
headers.pop("Content-Type")
response = session.post(
url=self.url,
data=obj,
files=form,
headers=headers,
timeout=self.timeout,
)
else:
logger.debug("Request body: %s", obj)
response = session.post(
url=self.url,
stream=self.stream,
json=obj,
headers={**self.headers},
timeout=self.timeout,
)
elif self.method == HTTPMethod.GET:
response = session.get(
url=self.url,
params=self.data.parameters,
headers=self.headers,
timeout=self.timeout,
)
else:
raise UnsupportedHTTPMethod(
f"Unsupported http method: {self.method}",
)
for rsp in self._handle_response(response):
yield rsp
finally:
# Only close if we created the session
if should_close:
session.close()
except BaseException as e:
logger.error(e)
raise e
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