mirror of https://github.com/jlelse/GoBlog
92 lines
2.6 KiB
Go
92 lines
2.6 KiB
Go
package main
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import (
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"net/http"
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"net/url"
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"strings"
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"github.com/samber/lo"
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"go.goblog.app/app/pkgs/builderpool"
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)
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func noIndexHeader(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-Robots-Tag", "noindex")
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next.ServeHTTP(w, r)
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})
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}
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func fixHTTPHandler(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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r.URL.RawPath = ""
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next.ServeHTTP(w, r)
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})
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}
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func headAsGetHandler(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.Method == http.MethodHead {
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// Clone request and change method
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newReq := new(http.Request)
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*newReq = *r
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newReq.Method = http.MethodGet
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// Serve new request
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next.ServeHTTP(w, newReq)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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func (a *goBlog) securityHeaders(next http.Handler) http.Handler {
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// Build CSP domains list
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cspBuilder := builderpool.Get()
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if mp := a.cfg.Micropub.MediaStorage; mp != nil && mp.MediaURL != "" {
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if u, err := url.Parse(mp.MediaURL); err == nil {
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cspBuilder.WriteString(" ")
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cspBuilder.WriteString(u.Hostname())
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}
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}
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if len(a.cfg.Server.CSPDomains) > 0 {
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cspBuilder.WriteString(" ")
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cspBuilder.WriteString(strings.Join(a.cfg.Server.CSPDomains, " "))
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}
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cspDomains := cspBuilder.String()
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csp := "default-src 'self' blob:" + cspDomains + "; img-src 'self'" + cspDomains + " data:; frame-ancestors 'none';"
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builderpool.Put(cspBuilder)
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// Return handler
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Strict-Transport-Security", "max-age=31536000;")
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w.Header().Set("Referrer-Policy", "no-referrer")
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w.Header().Set("X-Content-Type-Options", "nosniff")
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w.Header().Set("X-Frame-Options", "DENY")
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w.Header().Set("X-Xss-Protection", "1; mode=block")
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w.Header().Set("Content-Security-Policy", csp)
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next.ServeHTTP(w, r)
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})
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}
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func (a *goBlog) addOnionLocation(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if a.torAddress != "" {
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w.Header().Set("Onion-Location", a.torAddress+r.URL.RequestURI())
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}
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next.ServeHTTP(w, r)
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})
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}
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func keepSelectedQueryParams(paramsToKeep ...string) func(http.Handler) http.Handler {
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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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query := r.URL.Query()
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for param := range query {
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if !lo.Contains(paramsToKeep, param) {
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query.Del(param)
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}
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}
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r.URL.RawQuery = query.Encode()
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next.ServeHTTP(w, r)
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})
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}
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}
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