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package static
import (
"net/http"
"path"
"github.com/spiral/errors"
"github.com/spiral/roadrunner/v2/interfaces/config"
"github.com/spiral/roadrunner/v2/interfaces/log"
)
// ID contains default service name.
const PluginName = "static"
const RootPluginName = "http"
// Plugin serves static files. Potentially convert into middleware?
type Plugin struct {
// server configuration (location, forbidden files and etc)
cfg *Config
log log.Logger
// root is initiated http directory
root http.Dir
}
// Init must return configure service and return true if service hasStatus enabled. Must return error in case of
// misconfiguration. Services must not be used without proper configuration pushed first.
func (s *Plugin) Init(cfg config.Configurer, log log.Logger) error {
const op = errors.Op("static plugin init")
err := cfg.UnmarshalKey(RootPluginName, &s.cfg)
if err != nil {
return errors.E(op, errors.Disabled, err)
}
s.log = log
s.root = http.Dir(s.cfg.Static.Dir)
err = s.cfg.Valid()
if err != nil {
return errors.E(op, errors.Disabled, err)
}
return nil
}
func (s *Plugin) Name() string {
return PluginName
}
// middleware must return true if request/response pair is handled within the middleware.
func (s *Plugin) Middleware(next http.Handler) http.HandlerFunc {
// Define the http.HandlerFunc
return func(w http.ResponseWriter, r *http.Request) {
if s.cfg.Static.Request != nil {
for k, v := range s.cfg.Static.Request {
r.Header.Add(k, v)
}
}
if s.cfg.Static.Response != nil {
for k, v := range s.cfg.Static.Response {
w.Header().Set(k, v)
}
}
if !s.handleStatic(w, r) {
next.ServeHTTP(w, r)
}
}
}
func (s *Plugin) handleStatic(w http.ResponseWriter, r *http.Request) bool {
fPath := path.Clean(r.URL.Path)
if s.cfg.AlwaysForbid(fPath) {
return false
}
f, err := s.root.Open(fPath)
if err != nil {
s.log.Error("file open error", "error", err)
if s.cfg.AlwaysServe(fPath) {
w.WriteHeader(404)
return true
}
return false
}
defer func() {
err = f.Close()
if err != nil {
s.log.Error("file closing error", "error", err)
}
}()
d, err := f.Stat()
if err != nil {
return false
}
// do not serve directories
if d.IsDir() {
return false
}
http.ServeContent(w, r, d.Name(), d.ModTime(), f)
return true
}
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