[GitHub] [apisix] sniper-xx edited a comment on issue #4074: request help: How to rewrite the data of backend server response?

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

sniper-xx edited a comment on issue #4074:
URL: https://github.com/apache/apisix/issues/4074#issuecomment-822111340


   @Firstsawyou The problem has resovled.  the reason is:
   for the large json response, the _M.body_filter will execute many times.  I store every  ngx.arg[1] to  variable backend_content, but the ngx.arg[1] not clear, so ,the final result is repeated. 
   solution:  
    ```lua
     if not isFinished then
         backend_content = backend_content..ngx.arg[1]
         ngx.arg[1] = nil -- have to clear ngx.arg[1]
     end
   ```
      


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