119 lines
3.1 KiB
Go
119 lines
3.1 KiB
Go
package caddyanubis
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import (
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"log/slog"
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"net/http"
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"github.com/TecharoHQ/anubis"
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libanubis "github.com/TecharoHQ/anubis/lib"
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"github.com/TecharoHQ/anubis/lib/policy"
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"github.com/caddyserver/caddy/v2"
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"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
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"github.com/caddyserver/caddy/v2/caddyconfig/httpcaddyfile"
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"github.com/caddyserver/caddy/v2/modules/caddyhttp"
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"go.uber.org/zap"
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)
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func init() {
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caddy.RegisterModule(AnubisMiddleware{})
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httpcaddyfile.RegisterHandlerDirective("anubis", parseCaddyfile)
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httpcaddyfile.RegisterDirectiveOrder("anubis", httpcaddyfile.After, "templates")
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}
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type AnubisMiddleware struct {
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Target *string `json:"target,omitempty"`
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AnubisPolicy *policy.ParsedConfig
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AnubisServer *libanubis.Server
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Next caddyhttp.Handler
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logger *zap.Logger
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}
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// CaddyModule returns the Caddy module information.
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func (AnubisMiddleware) CaddyModule() caddy.ModuleInfo {
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return caddy.ModuleInfo{
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ID: "http.handlers.anubis",
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New: func() caddy.Module { return new(AnubisMiddleware) },
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}
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}
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// Provision implements caddy.Provisioner.
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func (m *AnubisMiddleware) Provision(ctx caddy.Context) error {
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m.logger = ctx.Logger().Named("anubis")
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m.logger.Info("Anubis middleware provisioning")
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policy, err := libanubis.LoadPoliciesOrDefault("", anubis.DefaultDifficulty)
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if err != nil {
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return err
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}
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m.AnubisPolicy = policy
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m.AnubisServer, err = libanubis.New(libanubis.Options{
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Next: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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m.logger.Info("Anubis middleware calling next")
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if m.Target != nil {
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http.Redirect(w, r, *m.Target, http.StatusTemporaryRedirect)
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} else {
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m.Next.ServeHTTP(w, r)
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}
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}),
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Policy: m.AnubisPolicy,
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ServeRobotsTXT: true,
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})
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if err != nil {
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return err
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}
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m.logger.Info("Anubis middleware provisioned")
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return nil
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}
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// Validate implements caddy.Validator.
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func (m *AnubisMiddleware) Validate() error {
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return nil
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}
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// ServeHTTP implements caddyhttp.MiddlewareHandler.
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func (m *AnubisMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error {
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m.logger.Info("Anubis middleware processing request")
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slog.SetLogLoggerLevel(slog.LevelDebug)
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m.logger.Info("Anubis middleware sending request")
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m.Next = next
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m.AnubisServer.ServeHTTP(w, r)
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return nil
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}
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// UnmarshalCaddyfile implements caddyfile.Unmarshaler.
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func (m *AnubisMiddleware) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
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d.Next() // consume directive name
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// require an argument
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for nesting := d.Nesting(); d.NextBlock(nesting); {
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switch d.Val() {
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case "target":
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if d.NextArg() {
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val := d.Val()
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m.Target = &val
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}
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}
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}
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return nil
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}
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// parseCaddyfile unmarshals tokens from h into a new Middleware.
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func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
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var m AnubisMiddleware
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err := m.UnmarshalCaddyfile(h.Dispenser)
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return &m, err
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}
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// Interface guards
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var (
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_ caddy.Provisioner = (*AnubisMiddleware)(nil)
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_ caddy.Validator = (*AnubisMiddleware)(nil)
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_ caddyhttp.MiddlewareHandler = (*AnubisMiddleware)(nil)
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_ caddyfile.Unmarshaler = (*AnubisMiddleware)(nil)
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)
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