Ta yaya Nginx yake zaɓar server block ga domain?

Question

IT Interview Practice · Accepted Answer

Server block yana tattara configuration na gidan yanar gizo. Nginx yana amfani da adireshi da port da suka karɓi buƙatar, sannan sunan host da aka nema, don zaɓar gidan HTTP da ya dace.

## Domain biyu, sabar ɗaya

Sanya waɗannan blocks cikin `http`. Ka ɗauka cewa domain biyun suna nuni zuwa na'ura ɗaya:

```nginx
server {
    listen 80 default_server;
    server_name shop.example.com;
    return 200 "shop";
}
server {
    listen 80;
    server_name docs.example.com;
    return 200 "docs";
}
```

Buƙata mai `Host: docs.example.com` tana karɓar `docs`. Wadda ke da `Host: shop.example.com` tana karɓar `shop`. Header na Host yana gaya wa Nginx domain ɗin da baƙon ya nema.

## Idan sunan bai dace da ko ɗaya ba fa?

A wannan misalin, host da ba a sani ba yana karɓar `shop` domin block ɗinsa yana da `default_server`. Wannan zaɓin tsoho na adireshi da port na sauraro ne. A production, wani default block daban zai iya ƙin hosts da ba a sani ba maimakon nuna gidan yanar gizo na gaske.

## HTTPS yana ƙara wani mataki kafin haka

TLS handshake yana zaɓar certificate kafin buƙatar HTTP ta iso. SNI shi ne sunan domain da client ke aikawa a lokacin handshake. Lokacin binciken matsalar HTTPS, duba certificate da SNI tare da header na Host da ke zuwa daga baya.

[Takardun hukuma](https://nginx.org/en/docs/http/request_processing.html).

Domain biyu, sabar ɗaya

Idan sunan bai dace da ko ɗaya ba fa?

HTTPS yana ƙara wani mataki kafin haka

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