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# Copyright (c) Alibaba, Inc. and its affiliates.
import json
from http import HTTPStatus
import aiohttp
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 async_to_sync
class AioHttpRequest(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,
user_agent: str = "",
) -> 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 ''.
"""
super().__init__(user_agent=user_agent)
self.url = url
self.async_request = async_request
self.headers = {
"Accept": "application/json",
"Authorization": f"Bearer {api_key}",
"Cache-Control": "no-cache",
**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 = async_to_sync(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_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_stream(self, response):
# TODO define done message.
is_error = False
status_code = HTTPStatus.BAD_REQUEST
async for line in response.content:
if line:
line = line.decode("utf8")
line = line.rstrip("\n").rstrip("\r")
if line.startswith("event:error"):
is_error = True
elif line.startswith("status:"):
status_code = line[len("status:") :]
status_code = int(status_code.strip())
elif line.startswith("data:"):
line = line[len("data:") :]
yield (is_error, status_code, line)
if is_error:
break
else:
continue # ignore heartbeat...
# pylint: disable=too-many-statements
async def _handle_response( # pylint: disable=too-many-branches
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 self._handle_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:
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:
break
output[part.name] = await part.read()
# pylint: disable=consider-using-get
if "request_id" in output:
request_id = output["request_id"]
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"]
if "usage" in json_content:
usage = json_content["usage"]
if "request_id" in json_content:
request_id = json_content["request_id"]
yield DashScopeAPIResponse(
request_id=request_id,
status_code=HTTPStatus.OK,
output=output,
usage=usage,
)
else:
if "application/json" in response.content_type:
error = await response.json()
if "request_id" in error:
request_id = error["request_id"]
if "message" not in error:
message = ""
logger.error(
"Request: %s failed, status: %s",
self.url,
response.status,
)
else:
message = error["message"]
logger.error(
"Request: %s failed, status: %s, message: %s",
self.url,
response.status,
error["message"],
)
yield DashScopeAPIResponse(
request_id=request_id,
status_code=response.status,
code=error["code"],
message=message,
)
else:
msg = await response.read()
yield DashScopeAPIResponse(
request_id=request_id,
status_code=response.status,
code="Unknown",
message=msg.decode("utf-8"),
)
async def _handle_request(self):
try:
async with aiohttp.ClientSession(
timeout=aiohttp.ClientTimeout(total=self.timeout),
headers=self.headers,
) as session:
logger.debug("Starting request: %s", self.url)
if self.method == HTTPMethod.POST:
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:
response = await session.get(
url=self.url,
params=self.data.parameters,
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_response(response):
yield rsp
except aiohttp.ClientConnectorError as e:
logger.error(e)
raise e
except Exception as e:
logger.error(e)
raise e
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