b07bbea0aa
This change adds maxmind support for translating client IP addresses to their country of origin. We decorate our metrics with this country code to improve our understanding of users. Resolves https://github.com/mjpitz/pages/issues/3
57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
// Copyright (C) 2022 The pages authors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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package geoip
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import (
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"context"
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"net"
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"net/http"
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"github.com/gorilla/mux"
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"github.com/mjpitz/myago"
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)
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var key = myago.ContextKey("geoip.info")
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func Extract(ctx context.Context) Info {
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val := ctx.Value(key)
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v, ok := val.(Info)
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if val == nil || !ok {
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return Info{}
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}
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return v
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}
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func Middleware(geoip Interface) mux.MiddlewareFunc {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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clientIP, _, err := net.SplitHostPort(r.RemoteAddr)
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if err != nil {
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http.Error(w, "", http.StatusBadRequest)
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return
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}
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ctx := context.WithValue(r.Context(), key, geoip.Lookup(clientIP))
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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}
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