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ekster/cmd/eksterd/main.go

241 lines
6.1 KiB

// Copyright (C) 2018 Peter Stuifzand
//
// This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
// later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with this program. If not,
// see <http://www.gnu.org/licenses/>.
/*
Eksterd is a microsub server that is extendable.
*/
package main
import (
"database/sql"
"flag"
"fmt"
"log"
"net/http"
"os"
"time"
"github.com/gomodule/redigo/redis"
"github.com/pkg/errors"
"p83.nl/go/ekster/pkg/auth"
"p83.nl/go/ekster/pkg/server"
)
// AppOptions are options for the app
type AppOptions struct {
Port int
AuthEnabled bool
Headless bool
RedisServer string
BaseURL string
TemplateDir string
pool *redis.Pool
database *sql.DB
}
func init() {
log.SetFlags(log.Lshortfile | log.Ldate | log.Ltime)
}
func newPool(addr string) *redis.Pool {
return &redis.Pool{
MaxIdle: 3,
IdleTimeout: 240 * time.Second,
Dial: func() (redis.Conn, error) { return redis.Dial("tcp", addr) },
}
}
// WithAuth adds authorization to a http.Handler
func WithAuth(handler http.Handler, b *memoryBackend) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.Method == http.MethodOptions {
handler.ServeHTTP(w, r)
return
}
authorization := ""
values := r.URL.Query()
if r.Method == http.MethodGet && values.Get("action") == "events" && values.Get("access_token") != "" {
authorization = "Bearer " + values.Get("access_token")
} else {
authorization = r.Header.Get("Authorization")
}
var token auth.TokenResponse
authorized, err := b.AuthTokenAccepted(authorization, &token)
if err != nil {
log.Printf("token not accepted: %v", err)
}
if !authorized {
log.Printf("Token could not be validated")
http.Error(w, "Can't validate token", 403)
return
}
if token.Me != b.Me { // FIXME: Me should be part of the request
log.Printf("Missing \"me\" in token response: %#v\n", token)
http.Error(w, "Wrong me", 403)
return
}
handler.ServeHTTP(w, r)
})
}
// App is the main app structure
type App struct {
options AppOptions
backend *memoryBackend
hubBackend *hubIncomingBackend
}
// Run runs the app
func (app *App) Run() error {
err := initSearch()
if err != nil {
return fmt.Errorf("while starting app: %v", err)
}
app.backend.run()
app.hubBackend.run()
log.Printf("Listening on port %d\n", app.options.Port)
return http.ListenAndServe(fmt.Sprintf(":%d", app.options.Port), nil)
}
// NewApp initializes the App
func NewApp(options AppOptions) (*App, error) {
app := &App{
options: options,
}
backend, err := loadMemoryBackend(options.pool, options.database)
if err != nil {
return nil, err
}
app.backend = backend
app.backend.AuthEnabled = options.AuthEnabled
app.backend.baseURL = options.BaseURL
app.backend.hubIncomingBackend.pool = options.pool
app.backend.hubIncomingBackend.baseURL = options.BaseURL
app.hubBackend = &hubIncomingBackend{backend: app.backend, baseURL: options.BaseURL, pool: options.pool}
http.Handle("/micropub", &micropubHandler{
Backend: app.backend,
pool: options.pool,
})
handler, broker := server.NewMicrosubHandler(app.backend)
if options.AuthEnabled {
handler = WithAuth(handler, app.backend)
}
app.backend.broker = broker
http.Handle("/microsub", handler)
http.Handle("/incoming/", &incomingHandler{
Backend: app.hubBackend,
})
if !options.Headless {
handler, err := newMainHandler(app.backend, options.BaseURL, options.TemplateDir, options.pool)
if err != nil {
return nil, errors.Wrap(err, "could not create main handler")
}
http.Handle("/", handler)
}
return app, nil
}
func main() {
log.Println("eksterd - microsub server")
var options AppOptions
flag.IntVar(&options.Port, "port", 80, "port for serving api")
flag.BoolVar(&options.AuthEnabled, "auth", true, "use auth")
flag.BoolVar(&options.Headless, "headless", false, "disable frontend")
flag.StringVar(&options.RedisServer, "redis", "redis:6379", "redis server")
flag.StringVar(&options.BaseURL, "baseurl", "", "http server baseurl")
flag.StringVar(&options.TemplateDir, "templates", "./templates", "template directory")
flag.Parse()
if options.AuthEnabled {
log.Println("Using auth")
} else {
log.Println("Authentication disabled")
}
if options.BaseURL == "" {
if envVar, e := os.LookupEnv("EKSTER_BASEURL"); e {
options.BaseURL = envVar
} else {
log.Fatal("EKSTER_BASEURL environment variable not found, please set with external url, -baseurl url option")
}
}
if options.TemplateDir == "" {
if envVar, e := os.LookupEnv("EKSTER_TEMPLATES"); e {
options.TemplateDir = envVar
} else {
log.Fatal("EKSTER_TEMPLATES environment variable not found, use env var or -templates dir option")
}
}
createBackend := false
args := flag.Args()
if len(args) >= 1 {
if args[0] == "new" {
createBackend = true
}
}
if createBackend {
err := createMemoryBackend()
if err != nil {
log.Fatalf("Error while saving backend.json: %s", err)
}
// TODO(peter): automatically gather this information from login or otherwise
log.Println(`Config file "backend.json" is created in the current directory.`)
log.Println(`Update "Me" variable to your website address "https://example.com/"`)
log.Println(`Update "TokenEndpoint" variable to the address of your token endpoint "https://example.com/token"`)
return
}
pool := newPool(options.RedisServer)
options.pool = pool
db, err := sql.Open("postgres", "host=database user=postgres password=simple dbname=ekster sslmode=disable")
if err != nil {
log.Fatalf("database open failed: %s", err)
}
options.database = db
app, err := NewApp(options)
if err != nil {
log.Fatal(err)
}
log.Fatal(app.Run())
db.Close()
}