ziyou434 commented on issue #3062:
URL: https://github.com/apache/apisix/issues/3062#issuecomment-747163765
I redid some experiments and found that 12,000 characters was what
ngx.req_get_body_data() got.
So I use ngx.req_get_body_file() to find
```lua
ngx.req.read_body()
local body_file = ngx.req.get_body_file()
if body_file then
local data = core.request.get_file(body_file)
end
core.log.warn("data: ",data)
```
data: nil
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