mangoGoForward edited a comment on issue #4929:
URL: https://github.com/apache/apisix/issues/4929#issuecomment-909784146


   > > the type of unzip_data is userdata
   > 
   > Any error logs? information from these two lines is less.
   
   When I use zlib.inflate to unzip the response, it return a userdata type, so 
it thrown bad argument when use json decode
   ```
   local data, err = core.json.decode(unzip_data)
   if not data then
       log.error("invalid response body: ", type(unzip_data), " err: ", err)
       return
   end
   ```
   The error log:
   `
   2021/08/31 09:29:35 [error] 12663#3713017: *80 [lua] eureka.lua:197: invalid 
response body err: bad argument #1 to '?' (string expected, got userdata), 
context: ngx.timer
   `
   I don't known how to process the data, can you help me? There is a problem 
when process the Eureka's returned data
   


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