[GitHub] [apisix] hmthoo commented on issue #8117: router can't support location @xxx ?

[GitBox <gi...@apache.org>]

hmthoo commented on issue #8117:
URL: https://github.com/apache/apisix/issues/8117#issuecomment-1283556117

   > It looks like you want to add an Nginx location configuration, and what you're adding here is a route. APISIX core does not use Nginx location for request matching, please check APISIX's definition of the route here https://github.com/apache/apisix/blob/master/docs/en/latest/admin-api.md# route. If you want to add Nginx configuration, please refer to here: https://github.com/apache/apisix/blob/master/conf/config-default.yaml#L170-L173.
   
   I didn't find the answer I was looking for in the documentation. 
   
   I want to disforward "/saas" to "@apps_stable" via a custom plugin.
   
   ## my code
   Forwarding to the location based on the cid in the cid list
   ```
   local core = require("apisix.core")
   local plugin_name = "cid-dispatch"
   local ngx_cache = ngx.shared.cid
   
   local schema = {
       type = "object",
       properties = {},
       additionalProperties = false,
   }
   
   local _M = {
       version = 1.0,
       priority = 3002,
       name = plugin_name,
       schema = schema,
   }
   
   function get_cookie(cname)
       local cookie_name = 'cookie_'..cname
       return ngx.var[cookie_name]
   end
   
   function get_upstream()
       local proxy = "@apps_stable"
       local cid_list = ngx_cache:get("cid_list")
   
       if  cid_cookie == nil then
           core.log.warn("can't get cid in cookie")
           return proxy
       end
   
       if cid_cookie then
           local patter_cid=','..cid_cookie..','
           local res = string.find(cid_list,patter_cid)
   
           if res == nil then
               return proxy
           end
   
           proxy = "@apps_canary"
           return proxy
       end
   
       return proxy
   end
   
   function _M.rewrite(conf, ctx)
       this_proxy = get_upstream()
       ngx.exec(this_proxy)
   end
   
   return _M
   ```
   


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