bskyweb: switch from PDS backend to AppView backend (#1065)

* bskyweb: replace PDS with AppView (no auth)

* bskyweb: update example .env files for appview

bskyweb/cmd/bskyweb/main.go

···
 			Action: serve,
 			Flags: []cli.Flag{
 				&cli.StringFlag{
-					Name:    "pds-host",
-					Usage:   "method, hostname, and port of PDS instance",
-					Value:   "http://localhost:4849",
-					EnvVars: []string{"ATP_PDS_HOST"},
-				},
-				&cli.StringFlag{
-					Name:     "handle",
-					Usage:    "for PDS login",
-					Required: true,
-					EnvVars:  []string{"ATP_AUTH_HANDLE"},
-				},
-				&cli.StringFlag{
-					Name:     "password",
-					Usage:    "for PDS login",
-					Required: true,
-					EnvVars:  []string{"ATP_AUTH_PASSWORD"},
+					Name:  "appview-host",
+					Usage: "method, hostname, and port of PDS instance",
+					Value: "http://localhost:2584",
+					// retain old PDS env var for easy transition
+					EnvVars: []string{"ATP_APPVIEW_HOST", "ATP_PDS_HOST"},
 				},
 				&cli.StringFlag{
 					Name:     "mailmodo-api-key",

bskyweb/cmd/bskyweb/server.go

···
 	"syscall"
 	"time"
 
-	comatproto "github.com/bluesky-social/indigo/api/atproto"
 	appbsky "github.com/bluesky-social/indigo/api/bsky"
 	cliutil "github.com/bluesky-social/indigo/cmd/gosky/util"
 	"github.com/bluesky-social/indigo/xrpc"
···
 func serve(cctx *cli.Context) error {
 	debug := cctx.Bool("debug")
 	httpAddress := cctx.String("http-address")
-	pdsHost := cctx.String("pds-host")
-	atpHandle := cctx.String("handle")
-	atpPassword := cctx.String("password")
+	appviewHost := cctx.String("appview-host")
 	mailmodoAPIKey := cctx.String("mailmodo-api-key")
 	mailmodoListName := cctx.String("mailmodo-list-name")
 
···
 	// Mailmodo client.
 	mailmodo := NewMailmodo(mailmodoAPIKey, mailmodoListName)
 
-	// create a new session
-	// TODO: does this work with no auth at all?
+	// create a new session (no auth)
 	xrpcc := &xrpc.Client{
 		Client: cliutil.NewHttpClient(),
-		Host:   pdsHost,
-		Auth: &xrpc.AuthInfo{
-			Handle: atpHandle,
-		},
+		Host:   appviewHost,
 	}
-
-	auth, err := comatproto.ServerCreateSession(context.TODO(), xrpcc, &comatproto.ServerCreateSession_Input{
-		Identifier: xrpcc.Auth.Handle,
-		Password:   atpPassword,
-	})
-	if err != nil {
-		return err
-	}
-	xrpcc.Auth.AccessJwt = auth.AccessJwt
-	xrpcc.Auth.RefreshJwt = auth.RefreshJwt
-	xrpcc.Auth.Did = auth.Did
-	xrpcc.Auth.Handle = auth.Handle
 
 	// httpd
 	var (

bskyweb/example.dev.env

···
 GOLOG_LOG_LEVEL=info
-ATP_PDS_HOST=http://localhost:2583
-ATP_AUTH_HANDLE="admin.test"
-ATP_AUTH_PASSWORD="admin"
+ATP_APPVIEW_HOST=http://localhost:2584

bskyweb/example.env

···
 GOLOG_LOG_LEVEL=info
-ATP_PDS_HOST=https://bsky.social
-ATP_AUTH_HANDLE=TODO
-ATP_AUTH_PASSWORD=TODO
+ATP_APPVIEW_HOST=https://api.bsky.app