Preference/Score API for mirrorz frontend

[ZenithalHourlyRate]

mirrorz-302 can give a preference list for users, that could be displayed in the frontend and guide them on selecting mirror site.

More specifically, the score in mirrorz-302 should be exposed in some /api/scores/

{
  "TUNA": { "GEO": 1, "ISP": 1, "CIDR": 24, "Delta": -1433 },
  "BFSU": { "GEO": 2, "ISP": 0, "CIDR": 0, "Delta": -143 },
}

The order of the keys are sorted according to the preference.

Then in mirrors.cernet.edu.cn/site, the mirror sites should be sorted according to that, each with different labels.

• Geographically close (地理较近)
• same ISP（相同运营商）
• CIDR matches (相邻子网)
• Lastest update (同步最新)

Then users can select according to these labels.

For /list/archlinux, we could also provide a /api/scores/archlinux/ so that specific list could also be sorted.

Future work

When we have mirrorz-statistics, we can add other labels like No load（负载较小）/Heavy load（流量饱和）

[ZenithalHourlyRate]

Done for /site