Use Case: Caching User Privileges
In this use case, user privileges (“GOLD”, “SILVER”, and so on) must be retrieved from an external web service.
创建一个HTTP callout获取用户的特权s from the external web service.
add policy httpcallout [-IPAddress ] [-port ] [-vServer ] [-returnType ] [-httpMethod (GET | POST )] [-hostExpr ] [-urlStemExpr ] [-headers ...] [-parameters ...] [-bodyExpr ][-fullReqExpr ] [-scheme ( http | https )] [-resultExpr ] [-cacheForSecs ] [-comment ] add policy httpcallout get_user_privilege -ipaddress 10.217.193.84 -port 80 -returnType text -httpMethod GET -hostExpr '"/get_user_privilege"' -resultExpr 'http.res.body(5)'
Store the privileges in a variable.
add ns variable -type [-scope ( global | transaction )][-ifFull ( undef | lru )] [-ifValueTooBig ( undef | truncate )][-ifNoValue ( undef | init )] [-init ] [-expires ] [-comment ] add ns variable user_privilege_map -type map(text(15),text(10),10000) -expires 1200 add ns assignment set_user_privilege -variable $user_privilege_map[client.ip.src] -set sys.http_callout(get_user_privilege)
Create a policy to check if there is already a cached entry for the client’s IP address; if not, it calls the HTTP callout to set a map entry for the client.
add cmp policy -rule -resAction add cmp policy set_user_privilege_pol -rule $user_privilege_map.valueExists(client.ip.src).not -resAction set_user_privilege>
Create a policy that compresses if the cached privilege entry for the client is “GOLD”.
add cmp policy -rule -resAction add cmp policy compress_if_gold_privilege_pol -rule '$user_privilege_map[client.ip.src].eq("GOLD")' -resAction compress
Bind the compression policies globally.
bind cmp global [-priority ] [-state (ENABLED | DISABLED )] [-gotoPriorityExpression ] [-type ] [-invoke ( ) ] bind cmp global set_user_privilege_pol -priority 10 NEXT bind cmp global compress_if_gold_privilege_pol -priority 20 END
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DIESER DIENST KANN ÜBERSETZUNGEN ENTHALTEN, DIE VON GOOGLE BEREITGESTELLT WERDEN. GOOGLE LEHNT JEDE AUSDRÜCKLICHE ODER STILLSCHWEIGENDE GEWÄHRLEISTUNG IN BEZUG AUF DIE ÜBERSETZUNGEN AB, EINSCHLIESSLICH JEGLICHER GEWÄHRLEISTUNG DER GENAUIGKEIT, ZUVERLÄSSIGKEIT UND JEGLICHER STILLSCHWEIGENDEN GEWÄHRLEISTUNG DER MARKTGÄNGIGKEIT, DER EIGNUNG FÜR EINEN BESTIMMTEN ZWECK UND DER NICHTVERLETZUNG VON RECHTEN DRITTER.
这个服务可以CONTENIR DES TRADUCTIONS FOURNIESPAR GOOGLE. GOOGLE EXCLUT TOUTE GARANTIE RELATIVE AUX TRADUCTIONS, EXPRESSE OU IMPLICITE, Y COMPRIS TOUTE GARANTIE D'EXACTITUDE, DE FIABILITÉ ET TOUTE GARANTIE IMPLICITE DE QUALITÉ MARCHANDE, D'ADÉQUATION À UN USAGE PARTICULIER ET D'ABSENCE DE CONTREFAÇON.
ESTE SERVICIO PUEDE CONTENER TRADUCCIONES CON TECNOLOGÍA DE GOOGLE. GOOGLE RENUNCIA A TODAS LAS GARANTÍAS RELACIONADAS CON LAS TRADUCCIONES, TANTO IMPLÍCITAS COMO EXPLÍCITAS, INCLUIDAS LAS GARANTÍAS DE EXACTITUD, FIABILIDAD Y OTRAS GARANTÍAS IMPLÍCITAS DE COMERCIABILIDAD, IDONEIDAD PARA UN FIN EN PARTICULAR Y AUSENCIA DE INFRACCIÓN DE DERECHOS.
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ESTE SERVIÇO PODE CONTER TRADUÇÕES FORNECIDAS PELO GOOGLE. O GOOGLE SE EXIME DE TODAS AS GARANTIAS RELACIONADAS COM AS TRADUÇÕES, EXPRESSAS OU IMPLÍCITAS, INCLUINDO QUALQUER GARANTIA DE PRECISÃO, CONFIABILIDADE E QUALQUER GARANTIA IMPLÍCITA DE COMERCIALIZAÇÃO, ADEQUAÇÃO A UM PROPÓSITO ESPECÍFICO E NÃO INFRAÇÃO.
