execution works :D

cmd/internal/topic.go

@@ -0,0 +1,21 @@
+package internal
+
+import "github.com/rogpeppe/go-internal/txtar"
+
+// Topic name for wasmcloud -> executor communication
+const TopicName = "wasmcloud-to-executor-09d7e475-71ac-4bdd-be37-050af7a81c58"
+
+type ExecRequest struct {
+	WASMCID string            `json:"wasmcid"`
+	Data    []byte            `json:"data"`
+	ABI     ABI               `json:"abi"`
+	Env     map[string]string `json:"env"`
+	UUID    string            `json:"uuid"`
+}
+
+type ExecResponse struct {
+	WASMCID      string        `json:"wasmcid"`
+	LogBundleCID string        `json:"log_bundle_cid"`
+	Logs         txtar.Archive `json:"logs"`
+	UUID         string        `json:"uuid"`
+}

cmd/internal/types.go

@@ -0,0 +1,13 @@
+package internal
+
+type ABI string
+
+const (
+	CWA    ABI = "cwa"
+	Dagger ABI = "dagger"
+)
+
+type Handler struct {
+	WASM []byte `json:"wasm"`
+	ABI  string `json:"abi"`
+}

cmd/wasmcloud-executor/main.go

@@ -0,0 +1,165 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/signal"
+	"sync"
+	"syscall"
+	"time"
+
+	shell "github.com/ipfs/go-ipfs-api"
+	"github.com/perlin-network/life/compiler"
+	"github.com/perlin-network/life/exec"
+	"github.com/rogpeppe/go-internal/txtar"
+	"tulpa.dev/within/wasmcloud/cmd/internal"
+	"within.website/olin/abi/cwa"
+)
+
+var (
+	ipfsURL     = flag.String("ipfs-host", "localhost:5001", "IPFS host (must have pubsub experiment enabled)")
+	workerCount = flag.Int("worker-count", 1, "number of wasm executor workers")
+)
+
+func main() {
+	log.SetFlags(log.LstdFlags | log.Lshortfile)
+
+	sh := shell.NewShell(*ipfsURL)
+	subsc, err := sh.PubSubSubscribe(internal.TopicName)
+	if err != nil {
+		log.Fatal(err)
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	c := make(chan os.Signal, 2)
+	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		<-c
+		cancel()
+	}()
+
+	var wg sync.WaitGroup
+	wg.Add(*workerCount)
+
+	for range make([]struct{}, *workerCount) {
+		go waitForNewWASM(ctx, &wg, sh, subsc)
+	}
+
+	log.Printf("waiting for work on %s", internal.TopicName)
+	wg.Wait()
+}
+
+func waitForNewWASM(ctx context.Context, wg *sync.WaitGroup, sh *shell.Shell, subsc *shell.PubSubSubscription) {
+	defer wg.Done()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		default:
+		}
+
+		msg, err := subsc.Next()
+		if err != nil {
+			log.Printf("error getting message: %v", err)
+			return
+		}
+
+		data := msg.Data
+		var er internal.ExecRequest
+		err = json.Unmarshal(data, &er)
+		if err != nil {
+			log.Printf("invalid message %s: %v", string(data), err)
+			continue
+		}
+
+		stdin := bytes.NewBuffer(er.Data)
+		stdout := bytes.NewBuffer(nil)
+		logBuf := bytes.NewBuffer(nil)
+
+		bin, err := sh.Cat(er.WASMCID)
+		if err != nil {
+			log.Printf("can't get wasm: %v", err)
+			continue
+		}
+
+		wasmBin, err := ioutil.ReadAll(bin)
+		bin.Close()
+		if err != nil {
+			log.Printf("can't get wasm binary %s: %v", er.WASMCID, err)
+			continue
+		}
+
+		p := cwa.NewProcess(er.WASMCID, nil, er.Env)
+		p.Stdin = stdin
+		p.Stdout = stdout
+		p.Stderr = stdout
+		p.Logger = log.New(io.MultiWriter(logBuf, os.Stdout), er.WASMCID+" ", log.LstdFlags)
+
+		gp := &compiler.SimpleGasPolicy{GasPerInstruction: 1}
+		vm, err := exec.NewVirtualMachine(wasmBin, exec.VMConfig{}, p, gp)
+		if err != nil {
+			p.Logger.Printf("[SYSTEM] can't create VM: %v", err)
+			continue
+		}
+
+		main, ok := vm.GetFunctionExport("cwa_main")
+		if !ok {
+			p.Logger.Printf("[SYSTEM] can't get main function")
+			continue
+		}
+
+		begin := time.Now()
+		ret, err := vm.Run(main)
+		if err != nil {
+			p.Logger.Printf("error running main: %v", err)
+			continue
+		}
+		dur := time.Since(begin)
+
+		p.Logger.Printf("[SYSTEM] return status: %v", ret)
+
+		arc := txtar.Archive{
+			Comment: []byte(fmt.Sprintf("%s: execution of %s at %s", er.UUID, er.WASMCID, begin.Format(time.RFC3339))),
+			Files: []txtar.File{
+				{
+					Name: "vmstats.txt",
+					Data: []byte(fmt.Sprintf("execution time: %s\ngas used: %v\nsyscall count: %v", dur, vm.Gas, p.SyscallCount())),
+				},
+				{
+					Name: "stdout.txt",
+					Data: stdout.Bytes(),
+				},
+				{
+					Name: "logs.txt",
+					Data: logBuf.Bytes(),
+				},
+			},
+		}
+
+		interm := bytes.NewBuffer(txtar.Format(&arc))
+		cid, err := sh.Add(interm)
+		if err != nil {
+			log.Printf("can't save execution results: %v", err)
+			continue
+		}
+
+		log.Printf("wasm module %s execution finished, logs at %s", er.WASMCID, cid)
+		resp := internal.ExecResponse{
+			WASMCID:      er.WASMCID,
+			LogBundleCID: cid,
+			Logs:         arc,
+			UUID:         er.UUID,
+		}
+		repMsg, _ := json.Marshal(resp)
+		sh.PubSubPublish(er.UUID, string(repMsg))
+	}
+}

cmd/wasmcloud/main.go

@@ -20,7 +20,8 @@ func main() {
 	subcommands.Register(subcommands.CommandsCommand(), "")
 	subcommands.Register(&loginCmd{}, "")
 	subcommands.Register(&whoamiCmd{}, "")
-	subcommands.Register(namegenCmd{}, "")
+	subcommands.Register(namegenCmd{}, "util")
+	subcommands.Register(&testWorkCommand{}, "util")
 	subcommands.ImportantFlag("api-server")
 	subcommands.ImportantFlag("config")
 

cmd/wasmcloud/test_work.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+
+	"github.com/google/subcommands"
+	"github.com/google/uuid"
+	shell "github.com/ipfs/go-ipfs-api"
+	"github.com/rogpeppe/go-internal/txtar"
+	"tulpa.dev/within/wasmcloud/cmd/internal"
+)
+
+type testWorkCommand struct {
+	wasmCID, abi, ipfsURL string
+}
+
+func (testWorkCommand) Name() string     { return "test-work" }
+func (testWorkCommand) Synopsis() string { return "sends a test work message over IPFS" }
+func (testWorkCommand) Usage() string    { return "TODO(within): this" }
+
+func (t *testWorkCommand) SetFlags(fs *flag.FlagSet) {
+	fs.StringVar(&t.wasmCID, "wasm-cid", "", "CID for the WASM to run")
+	fs.StringVar(&t.abi, "abi", "cwa", "which ABI to use")
+	fs.StringVar(&t.ipfsURL, "ipfs-host", "127.0.0.1:5001", "IPFS host")
+}
+
+func (t testWorkCommand) Execute(ctx context.Context, fs *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
+	sh := shell.NewShell(t.ipfsURL)
+	rdr, err := sh.Cat(t.wasmCID)
+	if err != nil {
+		log.Fatalf("error getting %s: %v", t.wasmCID, err)
+	}
+	io.Copy(ioutil.Discard, rdr)
+	rdr.Close()
+
+	er := internal.ExecRequest{
+		WASMCID: t.wasmCID,
+		ABI:     internal.ABI(t.abi),
+		Data:    []byte("hello, world"),
+		Env: map[string]string{
+			"MAGIC_CONCH": "yes",
+		},
+		UUID: uuid.New().String(),
+	}
+
+	data, err := json.Marshal(er)
+	if err != nil {
+		panic(err)
+	}
+
+	err = sh.PubSubPublish(internal.TopicName, string(data))
+	if err != nil {
+		log.Printf("can't publish data: %v", err)
+		return subcommands.ExitFailure
+	}
+
+	subsc, err := sh.PubSubSubscribe(er.UUID)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	msg, err := subsc.Next()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	var execResp internal.ExecResponse
+	err = json.Unmarshal(msg.Data, &execResp)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Println(string(txtar.Format(&execResp.Logs)))
+
+	return subcommands.ExitSuccess
+}

cmd/wasmcloudd/handler.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+
+	shell "github.com/ipfs/go-ipfs-api"
+	"tulpa.dev/within/wasmcloud/cmd/internal"
+	"within.website/ln"
+	"within.website/olin/namegen"
+)
+
+func createHandler(w http.ResponseWriter, r *http.Request, u *User) {
+	if !u.CanCreateHandlers {
+		http.Error(w, "you can't create handlers, contact support", http.StatusForbidden)
+		return
+	}
+
+	ctx := r.Context()
+	sh := shell.NewShell(*ipfsURL)
+	data, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		ln.Error(ctx, err)
+		http.Error(w, "invalid data", http.StatusBadRequest)
+		return
+	}
+	r.Body.Close()
+
+	var hdlr internal.Handler
+	err = json.Unmarshal(data, &hdlr)
+	if err != nil {
+		ln.Error(ctx, err)
+		http.Error(w, "not json", http.StatusBadRequest)
+		return
+	}
+
+	switch string(hdlr.ABI) {
+	case string(internal.CWA), string(internal.Dagger):
+	default:
+		ln.Log(ctx, ln.Info("unknown ABI"), ln.F{"abi": hdlr.ABI})
+		http.Error(w, "unknown ABI", http.StatusBadRequest)
+		return
+	}
+
+	cid, err := sh.Add(bytes.NewBuffer(hdlr.WASM))
+	if err != nil {
+		ln.Error(ctx, err)
+		http.Error(w, "can't upload wasm to storage", http.StatusInternalServerError)
+		return
+	}
+
+	n := namegen.Next()
+	h := Handler{
+		Name:   n,
+		User:   *u,
+		UserID: u.ID,
+		Path:   cid,
+	}
+
+	if err := db.Save(&h).Error; err != nil {
+		ln.Error(ctx, err)
+		http.Error(w, "can't save record", http.StatusInternalServerError)
+		return
+	}
+
+	json.NewEncoder(w).Encode(h)
+}

cmd/wasmcloudd/main.go

@@ -17,6 +17,7 @@ var (
 	databaseURL          = flag.String("database-url", "./wasmcloud.db", "database URL")
 	databaseKind         = flag.String("database-kind", "sqlite3", "database kind")
 	defaultTokenLifetime = flag.Duration("default-token-lifetime", 500*24*time.Hour, "default token lifetime")
+	ipfsURL              = flag.String("ipfs-host", "127.0.0.1:5001", "URL of the IPFS API")
 
 	db *gorm.DB
 )
@@ -31,7 +32,7 @@ func main() {
 	}
 
 	log.Println("migrating")
-	gormDB.AutoMigrate(User{}, Token{}, Stream{}, Handler{})
+	gormDB.AutoMigrate(User{}, Token{}, Handler{})
 	db = gormDB
 
 	rtr := mux.NewRouter()
@@ -46,6 +47,7 @@ func main() {
 	rtr.HandleFunc("/control/", authenticatedShowAPage("controlindex"))
 
 	rtr.HandleFunc("/api/whoami", makeHandler(true, apiWhoami))
+	rtr.HandleFunc("/api/handler/create", makeHandler(true, createHandler)).Methods(http.MethodPost)
 
 	rtr.PathPrefix("/static/").Handler(http.FileServer(http.Dir(".")))
 

cmd/wasmcloudd/models.go

@@ -26,13 +26,6 @@ type Token struct {
 	ExpiresAt time.Time
 }
 
-type Stream struct {
-	gorm.Model
-	Name   string
-	UserID uint
-	User   User
-}
-
 type Handler struct {
 	gorm.Model
 	Name   string

go.sum

@@ -1,22 +1,47 @@
+bou.ke/monkey v1.0.1/go.mod h1:FgHuK96Rv2Nlf+0u1OOVDpCMdsWyOFmeeketDHE7LIg=
+cirello.io/goherokuname v0.0.0-20190914093443-b436bae8c2c5 h1:W1xHfkFJ/G3/KGsRFV1S9DPFM6yB+ndu4Tbnvp7Ec1E=
+cirello.io/goherokuname v0.0.0-20190914093443-b436bae8c2c5/go.mod h1:lfp+7qXdkiHbLqAvsA4v2Cyll5djTKZTiNi+iDfPJcw=
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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 cloud.google.com/go v0.37.4/go.mod h1:NHPJ89PdicEuT9hdPXMROBD91xc5uRDxsMtSB16k7hw=
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+github.com/cespare/xxhash/v2 v2.1.0/go.mod h1:dgIUBU3pDso/gPgZ1osOZ0iQf77oPR28Tjxl5dIMyVM=
+github.com/cheekybits/is v0.0.0-20150225183255-68e9c0620927 h1:SKI1/fuSdodxmNNyVBR8d7X/HuLnRpvvFO0AgyQk764=
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@@ -25,11 +50,20 @@ github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 h1:q763qf9huN11kDQavWs
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@@ -43,8 +77,12 @@ github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 h1:JWuenKqqX8nojt
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@@ -52,6 +90,9 @@ github.com/go-sql-driver/mysql v1.4.1/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG
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@@ -64,6 +105,8 @@ github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
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@@ -73,6 +116,8 @@ github.com/google/subcommands v1.0.1 h1:/eqq+otEXm5vhfBrbREPCSVQbvofip6kIz+mX5TU
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@@ -114,48 +193,96 @@ github.com/mattn/go-colorable v0.0.9 h1:UVL0vNpWh04HeJXV0KLcaT7r06gOH2l4OW6ddYRU
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