Yukang-Lian opened a new pull request, #38895:
URL: https://github.com/apache/doris/pull/38895
## Proposed changes
Before this pr, this api needs backends' ip and port as param, which is hard
to use. This pr modify it. If there is no param, doris will print all backends
WAL info.
The acceptable usage are as follows
```
curl -u root: "127.0.0.1:8038/api/get_wal_size?host_ports=127.0.0.1:9058"
{"msg":"success","code":0,"data":["127.0.0.1:9058:0"],"count":0}%
curl -u root: "127.0.0.1:8038/api/get_wal_size?host_ports="
{"msg":"success","code":0,"data":["127.0.0.1:9058:0"],"count":0}%
curl -u root: "127.0.0.1:8038/api/get_wal_size"
{"msg":"success","code":0,"data":["127.0.0.1:9058:0"],"count":0}%
```
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