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httpserver/http.go

156 Zeilen
4.6 KiB
Go

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package httpserver
import (
"context"
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"crypto/tls"
"net/http"
"github.com/gin-gonic/gin"
"github.com/pelletier/go-toml"
"github.com/phuslu/log"
"go.sebtobie.de/httpserver/auth"
"go.sebtobie.de/httpserver/menus"
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)
// Config that is used to map the toml config to the settings that are used.
type Config struct {
Addr string
TLSconfig *tls.Config
Certfile string
Keyfile string
}
// MarshalLogObject adds the information over the object to the *log.Entry
func (c *Config) MarshalLogObject(e *log.Entry) {
e.Str("Address", c.Addr).Bool("TLS", c.TLSconfig != nil).Strs("Cert", []string{c.Certfile, c.Keyfile})
}
// Server is an wrapper for the *http.Server and *gin.Engine
type Server struct {
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http *http.Server
conf *Config
router *gin.Engine
mrouter map[string]*gin.Engine
config *toml.Tree
authhf auth.AuthenticationHandler
sites []Site
menus []menus.Menu
NotFoundHandler gin.HandlerFunc
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}
// StartServer starts the server as configured and sends the errormessage to the log.
func (s *Server) StartServer() {
log.Info().Msg("Starting server")
var err error
if s.conf.Certfile != "" && s.conf.Keyfile != "" {
err = s.http.ListenAndServeTLS(s.conf.Certfile, s.conf.Keyfile)
} else {
err = s.http.ListenAndServe()
}
if err != http.ErrServerClosed {
log.Error().Err(err).Msg("Server unexpected exited")
}
}
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// DomainRouter redirects the requests to the routers of the domains
func (s *Server) DomainRouter(c *gin.Context) {
domain := c.Request.URL.Host
entry := log.Trace().Str("domain", domain)
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if router, found := s.mrouter[domain]; found {
entry.Msg("Found domain")
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router.NoMethod(s.NotFoundHandler)
router.NoRoute(s.NotFoundHandler)
c.Set("domain", domain)
router.HandleContext(c)
return
}
entry.Interface("domains", s.mrouter).Msg("domain not found")
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s.NotFoundHandler(c)
}
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// CreateServer creates an server that can be run in a coroutine.
func CreateServer(config *toml.Tree) *Server {
log.Info().Msg("Redirect logging output to phuslu/log")
gin.DefaultErrorWriter = log.DefaultLogger.Std(log.ErrorLevel, log.Context{}, "GIN", 0).Writer()
gin.DefaultWriter = log.DefaultLogger.Std(log.DebugLevel, log.Context{}, "GIN", 0).Writer()
log.Info().Msg("Creating HTTP-Server")
var server = &Server{
conf: &Config{
Addr: "127.0.0.1:8080",
},
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router: gin.New(),
mrouter: map[string]*gin.Engine{},
authhf: &auth.AnonAccountHandler{},
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}
mw := []gin.HandlerFunc{
func(c *gin.Context) {
c.Set(Accounts, server.authhf.Account(c))
c.Set(Menus, server.menus)
},
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server.DomainRouter,
}
server.Use(mw...)
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server.router.RouterGroup.Handlers = mw
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if err := config.Unmarshal(server.conf); err != nil {
log.Error().Msg("Problem mapping config to Configstruct")
}
log.Debug().EmbedObject(server.conf).Msg("Config")
server.http = &http.Server{
Addr: server.conf.Addr,
ErrorLog: log.DefaultLogger.Std(log.ErrorLevel, log.Context{}, "", 0),
Handler: server.router,
TLSConfig: server.conf.TLSconfig,
}
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server.NotFoundHandler = gin.WrapH(http.NotFoundHandler())
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gin.DebugPrintRouteFunc = func(httpMethod, absolutePath, handlerName string, nuHandlers int) {
log.Trace().Msgf("%-4s(%02d): %-20s %s", httpMethod, nuHandlers-len(mw), absolutePath, handlerName)
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}
server.menus = []menus.Menu{}
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return server
}
// Use installs the middleware into the router.
// The Middleware must be able to detect multiple calls byy itself. Deduplication is not performed.
func (s *Server) Use(m ...gin.HandlerFunc) {
s.router.Use(m...)
}
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// UseAuthBackend is the funćtion that sets the Handler for the authentication
func (s *Server) UseAuthBackend(a auth.AuthenticationHandler) {
s.authhf = a
}
// Stop Shuts the Server down
func (s *Server) Stop(ctx context.Context) {
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log.Info().Err(s.http.Shutdown(ctx)).Msg("Server Shut down.")
for _, site := range s.sites {
site.Teardown()
}
}
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// Site is an Interface to abstract the modularized group of pages.
// The Middleware must be able to detect multiple calls byy itself. Deduplication is not performed.
type Site interface {
Init(*gin.RouterGroup)
Teardown()
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}
// RegisterSite adds an site to the engine as its own grouo
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func (s *Server) RegisterSite(domain, path string, site Site) {
var router *gin.Engine
var found bool
if router, found = s.mrouter[domain]; !found {
router = gin.New()
s.mrouter[domain] = router
}
site.Init(router.Group(path))
s.sites = append(s.sites, site)
if ms, ok := site.(menus.MenuSite); ok {
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menus := ms.Menu(domain)
log.Debug().Msgf("%d menus are added", len(menus))
s.menus = append(s.menus, menus...)
}
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return
}