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Factor out methods common to http and async cli

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This commit is contained in:
lash 2024-09-12 04:07:55 +01:00
parent dde9f552a6
commit d49f866ca4
Signed by: lash
GPG Key ID: 21D2E7BB88C2A746
4 changed files with 354 additions and 87 deletions
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236
cmd/async/main.go Normal file
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@ -0,0 +1,236 @@
package main
import (
"context"
"flag"
"fmt"
"os"
"path"
"git.defalsify.org/vise.git/asm"
"git.defalsify.org/vise.git/db"
fsdb "git.defalsify.org/vise.git/db/fs"
gdbmdb "git.defalsify.org/vise.git/db/gdbm"
"git.defalsify.org/vise.git/engine"
"git.defalsify.org/vise.git/resource"
"git.defalsify.org/vise.git/logging"
"git.grassecon.net/urdt/ussd/internal/handlers/ussd"
"git.grassecon.net/urdt/ussd/internal/handlers"
)
var (
logg = logging.NewVanilla()
scriptDir = path.Join("services", "registration")
)
type asyncRequestParser struct {
sessionId string
input []byte
}
func(p *asyncRequestParser) GetSessionId(r any) (string, error) {
return p.sessionId, nil
}
func(p *asyncRequestParser) GetInput(r any) ([]byte, error) {
return p.input, nil
}
func getFlags(fp string, debug bool) (*asm.FlagParser, error) {
flagParser := asm.NewFlagParser().WithDebug()
_, err := flagParser.Load(fp)
if err != nil {
return nil, err
}
return flagParser, nil
}
func getHandler(appFlags *asm.FlagParser, rs *resource.DbResource, userdataStore db.Db) (*ussd.Handlers, error) {
ussdHandlers, err := ussd.NewHandlers(appFlags, userdataStore)
if err != nil {
return nil, err
}
rs.AddLocalFunc("select_language", ussdHandlers.SetLanguage)
rs.AddLocalFunc("create_account", ussdHandlers.CreateAccount)
rs.AddLocalFunc("save_pin", ussdHandlers.SavePin)
rs.AddLocalFunc("verify_pin", ussdHandlers.VerifyPin)
rs.AddLocalFunc("check_identifier", ussdHandlers.CheckIdentifier)
rs.AddLocalFunc("check_account_status", ussdHandlers.CheckAccountStatus)
rs.AddLocalFunc("authorize_account", ussdHandlers.Authorize)
rs.AddLocalFunc("quit", ussdHandlers.Quit)
rs.AddLocalFunc("check_balance", ussdHandlers.CheckBalance)
rs.AddLocalFunc("validate_recipient", ussdHandlers.ValidateRecipient)
rs.AddLocalFunc("transaction_reset", ussdHandlers.TransactionReset)
rs.AddLocalFunc("max_amount", ussdHandlers.MaxAmount)
rs.AddLocalFunc("validate_amount", ussdHandlers.ValidateAmount)
rs.AddLocalFunc("reset_transaction_amount", ussdHandlers.ResetTransactionAmount)
rs.AddLocalFunc("get_recipient", ussdHandlers.GetRecipient)
rs.AddLocalFunc("get_sender", ussdHandlers.GetSender)
rs.AddLocalFunc("get_amount", ussdHandlers.GetAmount)
rs.AddLocalFunc("reset_incorrect", ussdHandlers.ResetIncorrectPin)
rs.AddLocalFunc("save_firstname", ussdHandlers.SaveFirstname)
rs.AddLocalFunc("save_familyname", ussdHandlers.SaveFamilyname)
rs.AddLocalFunc("save_gender", ussdHandlers.SaveGender)
rs.AddLocalFunc("save_location", ussdHandlers.SaveLocation)
rs.AddLocalFunc("save_yob", ussdHandlers.SaveYob)
rs.AddLocalFunc("save_offerings", ussdHandlers.SaveOfferings)
rs.AddLocalFunc("quit_with_balance", ussdHandlers.QuitWithBalance)
rs.AddLocalFunc("reset_account_authorized", ussdHandlers.ResetAccountAuthorized)
rs.AddLocalFunc("reset_allow_update", ussdHandlers.ResetAllowUpdate)
rs.AddLocalFunc("get_profile_info", ussdHandlers.GetProfileInfo)
rs.AddLocalFunc("verify_yob", ussdHandlers.VerifyYob)
rs.AddLocalFunc("reset_incorrect_date_format", ussdHandlers.ResetIncorrectYob)
rs.AddLocalFunc("set_reset_single_edit", ussdHandlers.SetResetSingleEdit)
rs.AddLocalFunc("initiate_transaction", ussdHandlers.InitiateTransaction)
return ussdHandlers, nil
}
func ensureDbDir(dbDir string) error {
err := os.MkdirAll(dbDir, 0700)
if err != nil {
return fmt.Errorf("state dir create exited with error: %v\n", err)
}
return nil
}
func getStateStore(dbDir string, ctx context.Context) (db.Db, error) {
store := gdbmdb.NewGdbmDb()
storeFile := path.Join(dbDir, "state.gdbm")
store.Connect(ctx, storeFile)
return store, nil
}
func getUserdataDb(dbDir string, ctx context.Context) db.Db {
store := gdbmdb.NewGdbmDb()
storeFile := path.Join(dbDir, "userdata.gdbm")
store.Connect(ctx, storeFile)
return store
}
func getResource(resourceDir string, ctx context.Context) (resource.Resource, error) {
store := fsdb.NewFsDb()
err := store.Connect(ctx, resourceDir)
if err != nil {
return nil, err
}
rfs := resource.NewDbResource(store)
return rfs, nil
}
func main() {
var sessionId string
var dbDir string
var resourceDir string
var size uint
var engineDebug bool
var stateDebug bool
var host string
var port uint
flag.StringVar(&sessionId, "session-id", "075xx2123", "session id")
flag.StringVar(&dbDir, "dbdir", ".state", "database dir to read from")
flag.StringVar(&resourceDir, "resourcedir", path.Join("services", "registration"), "resource dir")
flag.BoolVar(&engineDebug, "engine-debug", false, "use engine debug output")
flag.BoolVar(&stateDebug, "state-debug", false, "use engine debug output")
flag.UintVar(&size, "s", 160, "max size of output")
flag.StringVar(&host, "h", "127.0.0.1", "http host")
flag.UintVar(&port, "p", 7123, "http port")
flag.Parse()
logg.Infof("start command", "dbdir", dbDir, "resourcedir", resourceDir, "outputsize", size, "sessionId", sessionId)
ctx := context.Background()
pfp := path.Join(scriptDir, "pp.csv")
flagParser, err := getFlags(pfp, true)
if err != nil {
os.Exit(1)
}
cfg := engine.Config{
Root: "root",
OutputSize: uint32(size),
FlagCount: uint32(16),
}
if stateDebug {
cfg.StateDebug = true
}
if engineDebug {
cfg.EngineDebug = true
}
rs, err := getResource(resourceDir, ctx)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
err = ensureDbDir(dbDir)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
userdataStore := getUserdataDb(dbDir, ctx)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
defer userdataStore.Close()
dbResource, ok := rs.(*resource.DbResource)
if !ok {
os.Exit(1)
}
hl, err := getHandler(flagParser, dbResource, userdataStore)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
stateStore, err := getStateStore(dbDir, ctx)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
defer stateStore.Close()
rp := &asyncRequestParser{
sessionId: sessionId,
}
sh := handlers.NewBaseSessionHandler(cfg, rs, stateStore, userdataStore, rp, hl)
cfg.SessionId = sessionId
rqs := handlers.RequestSession{
Ctx: ctx,
Writer: os.Stdout,
Config: cfg,
}
for true {
rqs, err = sh.Process(rqs)
if err != nil {
fmt.Errorf("error in process: %v", err)
os.Exit(1)
}
rqs, err = sh.Output(rqs)
if err != nil {
fmt.Errorf("error in output: %v", err)
os.Exit(1)
}
rqs, err = sh.Reset(rqs)
if err != nil {
fmt.Errorf("error in reset: %v", err)
os.Exit(1)
}
fmt.Println("")
_, err = fmt.Scanln(&rqs.Input)
if err != nil {
fmt.Errorf("error in input: %v", err)
os.Exit(1)
}
}
}

102
internal/handlers/base.go Normal file
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@ -0,0 +1,102 @@
package handlers
import (
"git.defalsify.org/vise.git/engine"
"git.defalsify.org/vise.git/resource"
"git.defalsify.org/vise.git/persist"
"git.defalsify.org/vise.git/db"
"git.grassecon.net/urdt/ussd/internal/storage"
"git.grassecon.net/urdt/ussd/internal/handlers/ussd"
)
type BaseSessionHandler struct {
cfgTemplate engine.Config
rp RequestParser
rs resource.Resource
hn *ussd.Handlers
provider storage.StorageProvider
}
func NewBaseSessionHandler(cfg engine.Config, rs resource.Resource, stateDb db.Db, userdataDb db.Db, rp RequestParser, hn *ussd.Handlers) *BaseSessionHandler {
return &BaseSessionHandler{
cfgTemplate: cfg,
rs: rs,
hn: hn,
rp: rp,
provider: storage.NewSimpleStorageProvider(stateDb, userdataDb),
}
}
func(f* BaseSessionHandler) Shutdown() {
err := f.provider.Close()
if err != nil {
logg.Errorf("handler shutdown error", "err", err)
}
}
func(f *BaseSessionHandler) GetEngine(cfg engine.Config, rs resource.Resource, pr *persist.Persister) engine.Engine {
en := engine.NewEngine(cfg, rs)
en = en.WithPersister(pr)
return en
}
func(f *BaseSessionHandler) Process(rqs RequestSession) (RequestSession, error) {
var r bool
var err error
var ok bool
logg.InfoCtxf(rqs.Ctx, "new request", rqs)
rqs.Storage, err = f.provider.Get(rqs.Config.SessionId)
if err != nil {
logg.ErrorCtxf(rqs.Ctx, "", "storage error", "err", err)
return rqs, ErrStorage
}
f.hn = f.hn.WithPersister(rqs.Storage.Persister)
eni := f.GetEngine(rqs.Config, f.rs, rqs.Storage.Persister)
en, ok := eni.(*engine.DefaultEngine)
if !ok {
return rqs, ErrEngineType
}
en = en.WithFirst(f.hn.Init)
if rqs.Config.EngineDebug {
en = en.WithDebug(nil)
}
rqs.Engine = en
r, err = rqs.Engine.Init(rqs.Ctx)
if err != nil {
return rqs, err
}
if r && len(rqs.Input) > 0 {
r, err = rqs.Engine.Exec(rqs.Ctx, rqs.Input)
}
if err != nil {
return rqs, err
}
_ = r
return rqs, nil
}
func(f *BaseSessionHandler) Output(rqs RequestSession) (RequestSession, error) {
var err error
_, err = rqs.Engine.WriteResult(rqs.Ctx, rqs.Writer)
return rqs, err
}
func(f *BaseSessionHandler) Reset(rqs RequestSession) (RequestSession, error) {
defer f.provider.Put(rqs.Config.SessionId, rqs.Storage)
return rqs, rqs.Engine.Finish()
}
func(f *BaseSessionHandler) GetConfig() engine.Config {
return f.cfgTemplate
}
func(f *BaseSessionHandler) GetRequestParser() RequestParser {
return f.rp
}

7
internal/handlers/single.go
View File

@ -8,10 +8,15 @@ import (
"git.defalsify.org/vise.git/engine"
"git.defalsify.org/vise.git/resource"
"git.defalsify.org/vise.git/persist"
"git.defalsify.org/vise.git/logging"
"git.grassecon.net/urdt/ussd/internal/storage"
)
var (
logg = logging.NewVanilla().WithDomain("handlers")
)
var (
ErrInvalidRequest = errors.New("invalid request for context")
ErrSessionMissing = errors.New("missing session")
@ -39,6 +44,8 @@ type RequestParser interface {
}
type RequestHandler interface {
GetConfig() engine.Config
GetRequestParser() RequestParser
GetEngine(cfg engine.Config, rs resource.Resource, pe *persist.Persister) engine.Engine
Process(rs RequestSession) (RequestSession, error)
Output(rs RequestSession) (RequestSession, error)

96
internal/http/server.go
View File

@ -5,15 +5,9 @@ import (
"net/http"
"strconv"
"git.defalsify.org/vise.git/db"
"git.defalsify.org/vise.git/engine"
"git.defalsify.org/vise.git/logging"
"git.defalsify.org/vise.git/persist"
"git.defalsify.org/vise.git/resource"
"git.grassecon.net/urdt/ussd/internal/handlers"
"git.grassecon.net/urdt/ussd/internal/handlers/ussd"
"git.grassecon.net/urdt/ussd/internal/storage"
)
var (
@ -50,20 +44,12 @@ func(rp *DefaultRequestParser) GetInput(rq any) ([]byte, error) {
}
type SessionHandler struct {
cfgTemplate engine.Config
rp handlers.RequestParser
rs resource.Resource
hn *ussd.Handlers
provider storage.StorageProvider
handlers.RequestHandler
}
func NewSessionHandler(cfg engine.Config, rs resource.Resource, stateDb db.Db, userdataDb db.Db, rp handlers.RequestParser, hn *ussd.Handlers) *SessionHandler {
func ToSessionHandler(h handlers.RequestHandler) *SessionHandler {
return &SessionHandler{
cfgTemplate: cfg,
rs: rs,
hn: hn,
rp: rp,
provider: storage.NewSimpleStorageProvider(stateDb, userdataDb),
RequestHandler: h,
}
}
@ -79,71 +65,6 @@ func(f *SessionHandler) writeError(w http.ResponseWriter, code int, err error) {
return
}
func(f* SessionHandler) Shutdown() {
err := f.provider.Close()
if err != nil {
logg.Errorf("handler shutdown error", "err", err)
}
}
func(f *SessionHandler) GetEngine(cfg engine.Config, rs resource.Resource, pr *persist.Persister) engine.Engine {
en := engine.NewEngine(cfg, rs)
en = en.WithPersister(pr)
return en
}
func(f *SessionHandler) Process(rqs handlers.RequestSession) (handlers.RequestSession, error) {
var r bool
var err error
var ok bool
logg.InfoCtxf(rqs.Ctx, "new request", rqs)
rqs.Storage, err = f.provider.Get(rqs.Config.SessionId)
if err != nil {
logg.ErrorCtxf(rqs.Ctx, "", "storage error", "err", err)
return rqs, handlers.ErrStorage
}
f.hn = f.hn.WithPersister(rqs.Storage.Persister)
eni := f.GetEngine(rqs.Config, f.rs, rqs.Storage.Persister)
en, ok := eni.(*engine.DefaultEngine)
if !ok {
return rqs, handlers.ErrEngineType
}
en = en.WithFirst(f.hn.Init)
if rqs.Config.EngineDebug {
en = en.WithDebug(nil)
}
rqs.Engine = en
r, err = rqs.Engine.Init(rqs.Ctx)
if err != nil {
return rqs, err
}
if r && len(rqs.Input) > 0 {
r, err = rqs.Engine.Exec(rqs.Ctx, rqs.Input)
}
if err != nil {
return rqs, err
}
_ = r
return rqs, nil
}
func(f *SessionHandler) Output(rqs handlers.RequestSession) error {
var err error
_, err = rqs.Engine.WriteResult(rqs.Ctx, rqs.Writer)
return err
}
func(f *SessionHandler) Reset(rqs handlers.RequestSession) error {
defer f.provider.Put(rqs.Config.SessionId, rqs.Storage)
return rqs.Engine.Finish()
}
func(f *SessionHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
var code int
var err error
@ -153,14 +74,15 @@ func(f *SessionHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
Writer: w,
}
cfg := f.cfgTemplate
cfg.SessionId, err = f.rp.GetSessionId(req)
rp := f.GetRequestParser()
cfg := f.GetConfig()
cfg.SessionId, err = rp.GetSessionId(req)
if err != nil {
logg.ErrorCtxf(rqs.Ctx, "", "header processing error", err)
f.writeError(w, 400, err)
}
rqs.Config = cfg
rqs.Input, err = f.rp.GetInput(req)
rqs.Input, err = rp.GetInput(req)
if err != nil {
logg.ErrorCtxf(rqs.Ctx, "", "header processing error", err)
f.writeError(w, 400, err)
@ -186,13 +108,13 @@ func(f *SessionHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
w.WriteHeader(200)
w.Header().Set("Content-Type", "text/plain")
err = f.Output(rqs)
rqs, err = f.Output(rqs)
if err != nil {
f.writeError(w, 500, err)
return
}
err = f.Reset(rqs)
rqs, err = f.Reset(rqs)
if err != nil {
f.writeError(w, 500, err)
return