sniper-xx opened a new issue #4074:
URL: https://github.com/apache/apisix/issues/4074
### Issue description
I want to developing a plugin of apisix to fulfill unified format
encapsulation. for example:
```json
{
"status": 200,
"msg": "ok",
"data": "datas real response from backend server..."
}
```
I writed a plugin , override the _M.body_filter method, but the funcation
is not work correct. the code:
```lua
function _M.body_filter(conf, ctx)
core.log.error("------------------body_filter--------->")
local result = {
msg="ok",
code=status_code,
success=true
}
local isFinished = ngx.arg[2]
local resp_code = tonumber(status_code)
if not isFinished then
backend_content = backend_content..ngx.arg[1]
core.log.error("reading:---------------->
",string.len(backend_content))
ngx.arg[2] = false
end
if isFinished then
--ngx.arg[2] = false
core.log.error("end:----------------> ",ngx.arg[1])
core.log.error("ending:======================>
",string.len(backend_content))
--local r = "{\"mystatus\":200,\"data\":"..backend_content.."}";
result['data'] = cjson_decode(backend_content)
--ngx.arg[2] = true
ngx.arg[1] = cjson_encode(result)
ngx.arg[2] = true
end
end
```
the error is:
1、sometimes the client browser is not receive integrated json ;
2、the cjson_decode is error, printed error is : Expected end but
to_obejct_begin.
My Question is how to implements the uniform data form wrap? please.
### Environment
* apisix version (cmd: `apisix version`):
* OS (cmd: `uname -a`):
* OpenResty / Nginx version (cmd: `nginx -V` or `openresty -V`):
* etcd version, if have (cmd: run `curl
http://127.0.0.1:9090/v1/server_info` to get the info from server-info API):
* apisix-dashboard version, if have:
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