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server.go
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server.go
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package ads
import (
realip "github.com/Ferluci/fast-realip"
"github.com/mssola/user_agent"
"github.com/oschwald/geoip2-golang"
"github.com/valyala/fasthttp"
"log"
"net"
"net/http"
)
type Server struct {
geoip *geoip2.Reader
}
func NewServer(geoip *geoip2.Reader) *Server {
return &Server{geoip: geoip}
}
func (s *Server) Listen() error {
return fasthttp.ListenAndServe(":8080", s.handler)
}
func (s *Server) handler(ctx *fasthttp.RequestCtx) {
remoteIp := realip.FromRequest(ctx)
ua := string(ctx.Request.Header.UserAgent())
parsed := user_agent.New(ua)
browserName, _ := parsed.Browser()
country, err := s.geoip.Country(net.ParseIP(remoteIp))
if err != nil {
log.Printf("Failed to parse country: %v", err)
return
}
user := &User{
Country: country.Country.IsoCode,
Browser: browserName,
}
campaigns := GetStaticCampaigns()
winner := MakeAuction(campaigns, user)
if winner == nil {
ctx.Redirect("https://example.com", http.StatusSeeOther)
return
}
ctx.Redirect(winner.ClickUrl, http.StatusSeeOther)
}