refactor refactor refactor

This commit is contained in:
David 2024-01-01 16:26:36 -05:00
parent c26ece0c86
commit 034232f866
2 changed files with 214 additions and 130 deletions

120
cmd/serve/api.go Normal file
View File

@ -0,0 +1,120 @@
package main
import (
"encoding/json"
"fmt"
"io/fs"
"net/http"
"git.yetaga.in/alazyreader/library/media"
"tailscale.com/client/tailscale"
"tailscale.com/util/must"
)
type Router struct {
static fs.FS
lib Library
rcol RecordCollection
}
type AdminRouter struct {
static fs.FS
lib Library
ts *tailscale.LocalClient
}
func writeError[T any](w http.ResponseWriter) func(t T, err error) (T, bool) {
return func(t T, err error) (T, bool) {
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
return t, err != nil
}
}
func writeJSON(w http.ResponseWriter, b []byte, status int) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.WriteHeader(status)
w.Write(b)
w.Write([]byte("\n"))
}
func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
if req.URL.Path == "/api/records" {
RecordsAPIHandler(r.rcol).ServeHTTP(w, req)
return
}
if req.URL.Path == "/api/books" {
BooksAPIHandler(r.lib).ServeHTTP(w, req)
return
}
StaticHandler(r.static).ServeHTTP(w, req)
}
func (r *AdminRouter) ServeHTTP(w http.ResponseWriter, req *http.Request) {
whois, _ := r.ts.WhoIs(req.Context(), req.RemoteAddr)
switch req.URL.Path {
case "/api/books":
switch req.Method {
case http.MethodGet:
books, ok := writeError[[]media.Book](w)(r.lib.GetAllBooks(req.Context()))
if !ok {
return
}
b, ok := writeError[[]byte](w)(json.Marshal(books))
if !ok {
return
}
writeJSON(w, b, http.StatusOK)
case http.MethodPost:
default:
badMethod(w)
}
return
}
w.Write([]byte(fmt.Sprintf("%+v", whois.UserProfile.DisplayName)))
// StaticHandler(r.static).ServeHTTP(w, req)
}
func badMethod(w http.ResponseWriter) {
writeJSON(w,
must.Get(json.Marshal(struct{ Error string }{Error: "method not supported"})),
http.StatusMethodNotAllowed)
}
func BooksAPIHandler(l Library) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
books, err := l.GetAllBooks(r.Context())
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
b, err := json.Marshal(books)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
writeJSON(w, b, http.StatusOK)
})
}
func RecordsAPIHandler(l RecordCollection) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
books, err := l.GetAllRecords(r.Context())
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
b, err := json.Marshal(books)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
writeJSON(w, b, http.StatusOK)
})
}
func StaticHandler(f fs.FS) http.Handler {
return http.FileServer(http.FS(f))
}

View File

@ -2,11 +2,12 @@ package main
import (
"context"
"encoding/json"
"fmt"
"io/fs"
"log"
"net"
"net/http"
"os"
"os/signal"
"strings"
"time"
@ -16,8 +17,8 @@ import (
"git.yetaga.in/alazyreader/library/media"
"github.com/kelseyhightower/envconfig"
"golang.org/x/sync/errgroup"
"tailscale.com/client/tailscale"
"tailscale.com/tsnet"
"tailscale.com/util/must"
)
func obscureStr(in string, l int) string {
@ -32,94 +33,48 @@ type RecordCollection interface {
GetAllRecords(context.Context) ([]media.Record, error)
}
type Router struct {
static fs.FS
lib Library
rcol RecordCollection
}
type AdminRouter struct {
static fs.FS
lib Library
ts *tailscale.LocalClient
}
func writeJSON(w http.ResponseWriter, b []byte, status int) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.WriteHeader(status)
w.Write(b)
w.Write([]byte("\n"))
}
func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
if req.URL.Path == "/api/records" {
RecordsAPIHandler(r.rcol).ServeHTTP(w, req)
return
}
if req.URL.Path == "/api/books" {
BooksAPIHandler(r.lib).ServeHTTP(w, req)
return
}
StaticHandler(r.static).ServeHTTP(w, req)
}
func (r *AdminRouter) ServeHTTP(w http.ResponseWriter, req *http.Request) {
whois, _ := r.ts.WhoIs(req.Context(), req.RemoteAddr)
w.Write([]byte(fmt.Sprintf("%+v", whois.UserProfile.DisplayName)))
// StaticHandler(r.static).ServeHTTP(w, req)
}
func BooksAPIHandler(l Library) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
books, err := l.GetAllBooks(r.Context())
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
b, err := json.Marshal(books)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
writeJSON(w, b, http.StatusOK)
})
}
func RecordsAPIHandler(l RecordCollection) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
books, err := l.GetAllRecords(r.Context())
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
b, err := json.Marshal(books)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
writeJSON(w, b, http.StatusOK)
})
}
func StaticHandler(f fs.FS) http.Handler {
return http.FileServer(http.FS(f))
}
func main() {
var c config.Config
err := envconfig.Process("library", &c)
if err != nil {
log.Fatalln(err)
}
f, err := frontend.Root()
if err != nil {
log.Fatalln(err)
}
must.Do(envconfig.Process("library", &c))
var lib Library
var err error
if c.DBType == "memory" {
lib = &database.Memory{}
} else if c.DBType == "sql" {
var latest, run int
lib, latest, run, err = setupSQL(c)
if err != nil {
log.Fatalf("err starting sql connection: %v", err)
}
log.Printf("latest migration: %d; migrations run: %d", latest, run)
}
discogsCache := must.Get(database.NewDiscogsCache(
c.DiscogsToken, time.Hour*24, c.DiscogsUser, c.DiscogsPersist, c.DiscogsCacheFile,
))
frontendRoot := must.Get(frontend.Root())
adminRoot := must.Get(frontend.AdminRoot())
servers := make(chan (*http.Server), 2)
errGroup := errgroup.Group{}
errGroup.Go(start(servers)(
publicServer(8080, &Router{
static: frontendRoot,
lib: lib,
rcol: discogsCache,
})))
errGroup.Go(start(servers)(
tailscaleListener("library-admin", &AdminRouter{
static: adminRoot,
lib: lib,
})))
errGroup.Go(shutdown(servers))
log.Println(errGroup.Wait())
}
func setupSQL(c config.Config) (Library, int, int, error) {
if c.DBUser == "" || c.DBPass == "" || c.DBHost == "" || c.DBPort == "" || c.DBName == "" {
if c.DBPass != "" {
c.DBPass = obscureStr(c.DBPass, 3)
@ -127,65 +82,74 @@ func main() {
if c.DiscogsToken != "" {
c.DiscogsToken = obscureStr(c.DiscogsToken, 3)
}
log.Fatalf("vars: %+v", c)
return nil, 0, 0, fmt.Errorf("invalid config; vars provided: %+v", c)
}
sql, err := database.NewMySQLConnection(c.DBUser, c.DBPass, c.DBHost, c.DBPort, c.DBName)
if err != nil {
log.Fatalln(err)
return nil, 0, 0, err
}
err = sql.PrepareDatabase(context.Background())
if err != nil {
log.Fatalln(err)
return nil, 0, 0, err
}
latest, run, err := sql.RunMigrations(context.Background())
if err != nil {
log.Fatalln(err)
return nil, 0, 0, err
}
log.Printf("latest migration: %d; migrations run: %d", latest, run)
lib = sql
}
discogsCache, err := database.NewDiscogsCache(c.DiscogsToken, time.Hour*24, c.DiscogsUser, c.DiscogsPersist, c.DiscogsCacheFile)
return sql, latest, run, nil
}
func errFunc(err error) func() error {
return func() error { return err }
}
func start(servers chan (*http.Server)) func(*http.Server, net.Listener, error) func() error {
return func(s *http.Server, l net.Listener, err error) func() error {
if err != nil {
log.Fatalln(err)
return errFunc(err)
}
servers <- s
return errFunc(s.Serve(l))
}
errGroup := errgroup.Group{}
errGroup.Go(func() error {
return publicListener(8080, &Router{
static: f,
lib: lib,
rcol: discogsCache,
})
})
errGroup.Go(func() error {
f, _ := frontend.AdminRoot()
return tailscaleListener("library-admin", &AdminRouter{
static: f,
lib: lib,
})
})
log.Println(errGroup.Wait())
}
func publicListener(port int, handler http.Handler) error {
log.Printf("Listening on http://0.0.0.0:%d/", port)
return http.ListenAndServe(fmt.Sprintf(":%d", port), handler)
func shutdown(servers chan (*http.Server)) func() error {
sigint := make(chan os.Signal, 1)
signal.Notify(sigint, os.Interrupt)
<-sigint
close(servers)
for server := range servers {
ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
if err := server.Shutdown(ctx); err != nil {
log.Panicf("error during shutdown: %v", err)
}
cancel()
}
return errFunc(nil)
}
func tailscaleListener(hostname string, handler *AdminRouter) error {
func publicServer(port int, handler http.Handler) (*http.Server, net.Listener, error) {
server := &http.Server{Handler: handler}
ln, err := net.Listen("tcp", fmt.Sprintf(":%d", 8080))
if err != nil {
return nil, nil, err
}
return server, ln, nil
}
func tailscaleListener(hostname string, handler *AdminRouter) (*http.Server, net.Listener, error) {
s := &tsnet.Server{
Dir: ".config/" + hostname,
Hostname: hostname,
}
defer s.Close()
ln, err := s.Listen("tcp", ":80")
if err != nil {
fmt.Printf("%+v\n", err)
return nil
return nil, nil, err
}
handler.ts, err = s.LocalClient()
if err != nil {
return err
return nil, nil, err
}
return (&http.Server{Handler: handler}).Serve(ln)
server := &http.Server{Handler: handler}
return server, ln, nil
}