85 lines
2.3 KiB
Go
85 lines
2.3 KiB
Go
package middleware
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import (
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"net"
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"net/http"
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"code.nonshy.com/nonshy/website/pkg/config"
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"code.nonshy.com/nonshy/website/pkg/controller/index"
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"code.nonshy.com/nonshy/website/pkg/session"
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"code.nonshy.com/nonshy/website/pkg/utility"
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"github.com/oschwald/geoip2-golang"
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)
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// GeoGate: block access to the site based on the user's location (due to local laws or regulations).
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func GeoGate(handler http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Flash errors to admins.
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onError := func(err error) {
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session.FlashError(w, r, "GeoIP: %s", err)
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handler.ServeHTTP(w, r)
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}
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// See where they're coming from.
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db, err := geoip2.Open(config.GeoIPPath)
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if err != nil {
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onError(err)
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return
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}
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defer db.Close()
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// If you are using strings that may be invalid, check that ip is not nil
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addr := utility.IPAddress(r)
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ip := net.ParseIP(addr)
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if ip != nil {
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record, err := db.City(ip)
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if err != nil {
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onError(err)
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return
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}
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// Blocked by US states
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if record.Country.IsoCode == "US" {
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for _, sub := range record.Subdivisions {
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if _, ok := config.BlockUSStates[sub.IsoCode]; ok {
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session.LogoutUser(w, r)
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page := index.StaticTemplate("errors/geo_gate.html")()
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page(w, r)
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return
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}
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}
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}
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// Blocked by country code
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if _, ok := config.BlockCountries[record.Country.IsoCode]; ok {
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session.LogoutUser(w, r)
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page := index.StaticTemplate("errors/geo_gate.html")()
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page(w, r)
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return
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}
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// Debug info
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/*
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fmt.Printf("Portuguese (BR) city name: %v\n", record.City.Names["pt-BR"])
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if len(record.Subdivisions) > 0 {
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fmt.Printf("English subdivision name: %v\n", record.Subdivisions[0].Names["en"])
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}
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fmt.Printf("Russian country name: %v\n", record.Country.Names["ru"])
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fmt.Printf("ISO country code: %v\n", record.Country.IsoCode)
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fmt.Printf("Time zone: %v\n", record.Location.TimeZone)
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fmt.Printf("Coordinates: %v, %v\n", record.Location.Latitude, record.Location.Longitude)
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// Output:
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// Portuguese (BR) city name: Londres
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// English subdivision name: England
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// Russian country name: Великобритания
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// ISO country code: GB
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// Time zone: Europe/London
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// Coordinates: 51.5142, -0.0931
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*/
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}
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handler.ServeHTTP(w, r)
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})
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}
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