我目前正在 Google 的负载均衡器/CDN 组合后面的“Google Compute Engine”上设置 Nginx 服务器：
Website visitor <---> CDN <---> Load Balancer <---> Nginx on Google Compute Engine
我想将访问者从https://www.example.org/重定向到https://www.example.org/de/或https://www.example.org/en/，具体取决于客户端请求中的“Accept-Language”HTTP-Header。为此，我在 nginx.conf 配置文件中使用以下代码：
set $language_suffix "en";
if ($http_accept_language ~* "^de") {
set $language_suffix "de";
}
location = / {
add_header Vary "Accept-Language";
return 303 https://www.example.org/$language_suffix/;
}
但是，上面的配置会导致 502 错误：
~> curl -I https://www.example.org/
HTTP/2 502
content-type: text/html; charset=UTF-8
referrer-policy: no-referrer
content-length: 332
date: Mon, 11 Jun 2018 09:57:55 GMT
alt-svc: clear
我怎样才能解决这个问题？
更新：
XXX.XXX.XXX.XXX - "HEAD https://www.XXXXXXX.com/" 502 106 "curl/7.60.0" {
httpRequest: {
cacheLookup: true
remoteIp: "XXX.XXX.XXX.XXX"
requestMethod: "HEAD"
requestSize: "38"
requestUrl: "https://www.XXXXXXX.com/"
responseSize: "106"
status: 502
userAgent: "curl/7.60.0"
}
insertId: "XXXXXXXXXXXXX"
jsonPayload: {
@type: "type.googleapis.com/google.cloud.loadbalancing.type.LoadBalancerLogEntry"
statusDetails: "failed_to_pick_backend"
}
logName: "projects/crack-triode-XXXXXXXX/logs/requests"
receiveTimestamp: "2018-06-11T03:33:10.864056419Z"
resource: {
labels: {
backend_service_name: ""
forwarding_rule_name: "XXX-werbserver-ipv4-https"
project_id: "crack-triode-XXXXXXXX"
target_proxy_name: "XXX-werbserver-loadbalancer-target-proxy-2"
url_map_name: "XXX-werbserver-loadbalancer"
zone: "global"
}
type: "http_load_balancer"
}
severity: "WARNING"
spanId: "XXXXXXXXXXXXXX"
timestamp: "2018-06-11T03:33:10.088466141Z"
trace: "projects/crack-triode-XXXXXXXX/traces/XXXXXXXXXXXXXXX"
}
