Мое требование довольно простое. У меня есть конечная точка APIM, которая вызывает бэкэнд-сервис HTTP с предопределенным временем ожидания. Если запрос истекает или возвращает ошибку, отличную от «Плохой запрос» (Status Code > 400), вызов должен быть повторен с помощью службы HTTP при сбое до достижения успеха или не более 5 раз. Я пытаюсь прийти с политикой APIM для ccessli sh this. Хотя повтор и отработка отказа работают, если возвращенный код состояния выше 400, это не произойдет, если запрос просто истекает. Если запрос просто истекает, элемент управления даже не входит в <retry> блок. Я вполне уверен, что введенное мной условие повторения не в состоянии записать условие истечения времени ожидания. Может ли кто-нибудь помочь мне определить политику APIM, которая будет использоваться для записи тайм-аутов?
Ниже приведено политика APIM.
<policies>
<inbound>
<base />
<set-variable name="isFlag" value="true" />
</inbound>
<backend>
<choose>
<when condition="@(context.Variables.GetValueOrDefault<string>("isFlag") == "true")">
<set-backend-service base-url="<primary url>" />
<forward-request timeout="5" />
<retry condition="@(context.Response == null || context.Response.StatusCode > 400)" count="5" interval="1" first-fast-retry="true">
<set-backend-service base-url="<secondary url>" />
</retry>
</when>
</choose>
</backend>
<outbound>
<base />
</outbound>
<on-error>
<base />
</on-error>
</policies>
Ниже приведена выдержка из трассировки APIM
Inbound
(3.014 ms)
api-inspector (0.403 ms)
{
"request": {
"method": "GET",
"url": "https://gpcshare-apim-gpc-dev-aes.azure-api.net/statcode/405?sleep=7000",
"headers": [
{
"name": "Ocp-Apim-Subscription-Key",
"value": "a02f7f4e18d54d84ba55d4f122548072"
},
{
"name": "Sec-Fetch-Site",
"value": "cross-site"
},
{
"name": "Sec-Fetch-Mode",
"value": "cors"
},
{
"name": "X-Forwarded-For",
"value": "103.111.183.78"
},
{
"name": "Cache-Control",
"value": "no-cache, no-store"
},
{
"name": "Via",
"value": "ICAP/1.0 bmg70302.ibosscloud.com (IBOSS/0.4.4 iboss ICAP service )"
},
{
"name": "Content-Type",
"value": "text/plain;charset=UTF-8"
},
{
"name": "Accept",
"value": "*/*"
},
{
"name": "Accept-Encoding",
"value": "gzip,deflate,br"
},
{
"name": "Accept-Language",
"value": "en-US,en;q=0.9"
},
{
"name": "Host",
"value": "gpcshare-apim-gpc-dev-aes.azure-api.net"
},
{
"name": "Referer",
"value": "https://apimanagement.hosting.portal.azure.net/apimanagement/Content/1.42.0.1/apimap//apimap-apis/index.html?clientOptimizations=undefined&l=en.en-us&trustedAuthority=https%3A%2F%2Fportal.azure.com&shellVersion=undefined"
}
]
}
}
api-inspector (0.004 ms)
{
"configuration": {
"api": {
"from": "/statcode",
"to": null,
"version": null,
"revision": "1"
},
"operation": {
"method": "GET",
"uriTemplate": "/{code}"
},
"user": "-",
"product": "-"
}
}
cors (2.601 ms)
"Origin header was missing or empty and the request was classified as not cross-domain. CORS policy was not applied."
cors (0.002 ms)
"Origin header was missing or empty and the request was classified as not cross-domain. CORS policy was not applied."
set-variable (0.003 ms)
{
"message": "Context variable was successfully set.",
"name": "isFlag",
"value": "true"
}
Backend
(4,991.587 ms)↑ Back to top
choose (0.017 ms)
{
"message": "Expression was successfully evaluated.",
"expression": "context.Variables.GetValueOrDefault<string>(\"isFlag\") == \"true\"",
"value": true
}
set-backend-service (0.007 ms)
{
"message": "Backend service URL was changed.",
"oldBackendServiceUrl": "",
"newBackendServiceUrl": "https://httpstat.us/",
"request": {
"url": "https://httpstat.us/405?sleep=7000"
}
}
forward-request (0.151 ms)
{
"message": "Request is being forwarded to the backend service. Timeout set to 5 seconds",
"request": {
"method": "GET",
"url": "https://httpstat.us/405?sleep=7000",
"headers": [
{
"name": "Host",
"value": "httpstat.us"
},
{
"name": "Request-Id",
"value": "|f595c50c66d7453c97a7dc14c9c1af9e.2b06f656cb6c4704_b907aebb."
},
{
"name": "Ocp-Apim-Subscription-Key",
"value": "a02f7f4e18d54d84ba55d4f122548072"
},
{
"name": "Sec-Fetch-Site",
"value": "cross-site"
},
{
"name": "Sec-Fetch-Mode",
"value": "cors"
},
{
"name": "X-Forwarded-For",
"value": "103.111.183.78,13.91.254.72"
},
{
"name": "Cache-Control",
"value": "no-cache, no-store"
},
{
"name": "Via",
"value": "ICAP/1.0 bmg70302.ibosscloud.com (IBOSS/0.4.4 iboss ICAP service )"
},
{
"name": "Content-Type",
"value": "text/plain;charset=UTF-8"
},
{
"name": "Accept",
"value": "*/*"
},
{
"name": "Accept-Encoding",
"value": "gzip,deflate,br"
},
{
"name": "Accept-Language",
"value": "en-US,en;q=0.9"
},
{
"name": "Referer",
"value": "https://apimanagement.hosting.portal.azure.net/apimanagement/Content/1.42.0.1/apimap//apimap-apis/index.html?clientOptimizations=undefined&l=en.en-us&trustedAuthority=https%3A%2F%2Fportal.azure.com&shellVersion=undefined"
}
]
}
}
forward-request (4,991.413 ms)
{
"messages": [
"Error occured while calling backend service.",
"Request to the backend service timed out"
]
}
Outbound
(0.183 ms)↑ Back to top
transfer-response (0.067 ms)
{
"message": "Response headers have been sent to the caller."
}
transfer-response (0.116 ms)
{
"message": "Response body streaming to the caller is complete."
}