[英]Can you rate limit an Azure Function or output of a Storage Queue?
[英]How can I set Queue Storage message TTL in the context of an Azure Function output binding in Python?
我有一个带有队列输出绑定的 python azure 函数。 我成功地使用此绑定从函数内对消息进行排队。 是否可以在底层队列或消息本身上设置消息 TTL? 我不需要在每条消息的基础上设置它,但如果这是唯一的选择,我会这样做。
主机文件
{
"version": "2.0",
"extensionBundle": {
"id": "Microsoft.Azure.Functions.ExtensionBundle",
"version": "[1.*, 2.0.0)"
}
}
函数.json
{
"scriptFile": "__init__.py",
"bindings": [
{
"authLevel": "anonymous",
"type": "httpTrigger",
"direction": "in",
"name": "req",
"methods": [
"get",
"post"
]
},
{
"type": "http",
"direction": "out",
"name": "$return"
},
{
"type": "queue",
"direction": "out",
"name": "msg",
"queueName": "predictions",
"connection": "AzureWebJobsStorage"
}
]
}
功能码
import json
import logging
import azure.functions as func
from graphene import Schema
from .helpers import responses
from .schema.Query import Query
def main(req: func.HttpRequest, msg: func.Out[func.QueueMessage]) -> func.HttpResponse:
logging.info('Executing GraphQL function.')
try:
query = req.get_body().decode()
except ValueError:
pass
if query:
schema = Schema(Query)
results = schema.execute(query)
response = responses.graphql(results)
# Write response to azure queue storage
message = responses.storage(query, response)
if message:
msg.set(message)
return response
else:
return responses.bad_request(
'Please pass a GraphQL query in the request body.')
目前只支持 c# 语言,可以绑定到CloudQueue
类型。 如果是其他语言,则必须使用SDK方法来实现。 如果你坚持这个功能,你可以到这个github 问题来评论你的要求。
下面是我使用azure-storage-queue 2.1.0
在 HTTP 触发器函数中设置 TTL 的测试代码。
import logging
import azure.functions as func
from azure.storage.queue import QueueService
import os
def main(req: func.HttpRequest) -> func.HttpResponse:
logging.info('Python HTTP trigger function processed a request.')
queue_service = QueueService(connection_string=os.environ['AzureWebJobsStorage'])
message = req.params.get('message')
if not message:
try:
req_body = req.get_json()
except ValueError:
pass
else:
message = req_body.get('message')
if message:
queue_service.put_message('myqueue',message,None,300,None)
return func.HttpResponse(f" {message}!")
else:
return func.HttpResponse(
"Please pass message in the request body",
status_code=400
)
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