wip-http-server #45

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Alfred-mk wants to merge 1 commits from wip-http-server into master

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@ -4,6 +4,8 @@ import (
"context"
"flag"
"fmt"
"io"
"net/http"
"os"
"path"
@ -23,6 +25,65 @@ var (
scriptDir = path.Join("services", "registration")
)
type LocalHandler struct {
sessionId string
}
func NewLocalHandler() *LocalHandler {
return &LocalHandler{
sessionId: "",
}
}
type RequestParser interface {
GetSessionId(*http.Request) (string, error)
GetInput(*http.Request) ([]byte, error)
}
type DefaultRequestParser struct {
}
func(rp *DefaultRequestParser) GetSessionId(rq *http.Request) (string, error) {
v := rq.Header.Get("X-Vise-Session")
if v == "" {
return "", fmt.Errorf("no session found")
}
return v, nil
}
func(rp *DefaultRequestParser) GetInput(rq *http.Request) ([]byte, error) {
defer rq.Body.Close()
v, err := io.ReadAll(rq.Body)
if err != nil {
return nil, err
}
return v, nil
}
type DefaultSessionHandler struct {
cfgTemplate engine.Config
rp RequestParser
rh *LocalHandler
dbDir string
resourceDir string
}
func NewDefaultSessionHandler(dbDir string, resourceDir string, rp RequestParser, outputSize uint32, flagCount uint32) *DefaultSessionHandler {
rh := NewLocalHandler()
return &DefaultSessionHandler{
cfgTemplate: engine.Config{
OutputSize: outputSize,
Root: "root",
FlagCount: flagCount,
},
rh: rh,
rp: rp,
dbDir: dbDir,
resourceDir: resourceDir,
}
}
func getParser(fp string, debug bool) (*asm.FlagParser, error) {
flagParser := asm.NewFlagParser().WithDebug()
_, err := flagParser.Load(fp)
@ -74,29 +135,29 @@ func getHandler(appFlags *asm.FlagParser, rs *resource.DbResource, pe *persist.P
return ussdHandlers, nil
}
func getPersister(dbDir string, ctx context.Context) (*persist.Persister, error) {
err := os.MkdirAll(dbDir, 0700)
func(f *DefaultSessionHandler) getPersister(ctx context.Context) (*persist.Persister, error) {
err := os.MkdirAll(f.dbDir, 0700)
if err != nil {
return nil, fmt.Errorf("state dir create exited with error: %v\n", err)
}
store := gdbmdb.NewGdbmDb()
storeFile := path.Join(dbDir, "state.gdbm")
storeFile := path.Join(f.dbDir, "state.gdbm")
store.Connect(ctx, storeFile)
pr := persist.NewPersister(store)
return pr, nil
}
func getUserdataDb(dbDir string, ctx context.Context) db.Db {
func(f *DefaultSessionHandler) getUserdataDb(ctx context.Context) db.Db {
store := gdbmdb.NewGdbmDb()
storeFile := path.Join(dbDir, "userdata.gdbm")
storeFile := path.Join(f.dbDir, "userdata.gdbm")
store.Connect(ctx, storeFile)
return store
}
func getResource(resourceDir string, ctx context.Context) (resource.Resource, error) {
func(f *DefaultSessionHandler) getResource(ctx context.Context) (resource.Resource, error) {
store := fsdb.NewFsDb()
err := store.Connect(ctx, resourceDir)
err := store.Connect(ctx, f.resourceDir)
if err != nil {
return nil, err
}
@ -104,87 +165,144 @@ func getResource(resourceDir string, ctx context.Context) (resource.Resource, er
return rfs, nil
}
func getEngine(cfg engine.Config, rs resource.Resource, pr *persist.Persister) *engine.DefaultEngine {
func(f *DefaultSessionHandler) getEngine(rs resource.Resource, pr *persist.Persister, sessionId string) *engine.DefaultEngine {
cfg := f.cfgTemplate
cfg.SessionId = sessionId
en := engine.NewEngine(cfg, rs)
en = en.WithPersister(pr)
return en
}
func(f *DefaultSessionHandler) writeError(w http.ResponseWriter, code int, msg string, err error) {
w.Header().Set("X-Vise", msg + ": " + err.Error())
w.Header().Set("Content-Length", "0")
w.WriteHeader(code)
_, err = w.Write([]byte{})
if err != nil {
w.WriteHeader(500)
w.Header().Set("X-Vise", err.Error())
}
return
}
func(f *DefaultSessionHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
var r bool
sessionId, err := f.rp.GetSessionId(req)
if err != nil {
f.writeError(w, 400, "Session missing", err)
return
}
input, err := f.rp.GetInput(req)
if err != nil {
f.writeError(w, 400, "Input read fail", err)
return
}
ctx := req.Context()
ctx = context.WithValue(ctx, "SessionId", sessionId)
pfp := path.Join(scriptDir, "pp.csv")
flagParser, err := getParser(pfp, true)
if err != nil {
f.writeError(w, 500, "flagParser failed with error:", err)
return
}
rs, err := f.getResource(ctx)
if err != nil {
f.writeError(w, 500, "getResource failed with error:", err)
return
}
pr, err := f.getPersister(ctx)
if err != nil {
f.writeError(w, 500, "getPersister failed with error:", err)
return
}
store := f.getUserdataDb(ctx)
dbResource, ok := rs.(*resource.DbResource)
if !ok {
f.writeError(w, 500, "getHandler exited with error:", err)
return
}
hl, err := getHandler(flagParser, dbResource, pr, store)
if err != nil {
f.writeError(w, 500, "getHandler exited with error:", err)
return
}
en := f.getEngine(rs, pr, sessionId)
en = en.WithFirst(hl.Init)
if len(input) == 0 {
r, err = en.Init(ctx)
} else {
r, err = en.Exec(ctx, input)
}
if err != nil {
f.writeError(w, 500, "Engine exec fail", err)
return
}
// _, err = en.Init(ctx)
// if err != nil {
// f.writeError(w, 500, "Engine exec fail", err)
// return
// }
// err = engine.Loop(ctx, en, os.Stdin, os.Stdout)
// if err != nil {
// f.writeError(w, 500, "Loop exec fail", err)
// return
// }
w.WriteHeader(200)
w.Header().Set("Content-Type", "text/plain")
_, err = en.WriteResult(ctx, w)
if err != nil {
f.writeError(w, 500, "Write result fail", err)
return
}
_ = r
}
func main() {
var host string
var port string
var dbDir string
var resourceDir string
var size uint
var flagCount uint
var sessionId string
var debug bool
flag.StringVar(&host, "h", "127.0.0.1", "http host")
flag.StringVar(&port, "p", "7123", "http port")
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(&debug, "d", false, "use engine debug output")
flag.UintVar(&size, "s", 160, "max size of output")
flag.UintVar(&flagCount, "f", 16, "flag count")
flag.Parse()
logg.Infof("start command", "dbdir", dbDir, "resourcedir", resourceDir, "outputsize", size)
logg.Infof("starting server", "dbdir", dbDir, "resourcedir", resourceDir, "outputsize", size, "flagCount", flagCount)
ctx := context.Background()
ctx = context.WithValue(ctx, "SessionId", sessionId)
pfp := path.Join(scriptDir, "pp.csv")
flagParser, err := getParser(pfp, true)
rp := &DefaultRequestParser{}
h := NewDefaultSessionHandler(dbDir, resourceDir, rp, uint32(size), uint32(flagCount))
s := &http.Server{
Addr: fmt.Sprintf("%s:%s", host, port),
Handler: h,
}
err := s.ListenAndServe()
if err != nil {
os.Exit(1)
}
cfg := engine.Config{
Root: "root",
SessionId: sessionId,
OutputSize: uint32(size),
FlagCount: uint32(16),
}
rs, err := getResource(resourceDir, ctx)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
pr, err := getPersister(dbDir, ctx)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
store := getUserdataDb(dbDir, ctx)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
dbResource, ok := rs.(*resource.DbResource)
if !ok {
os.Exit(1)
}
hl, err := getHandler(flagParser, dbResource, pr, store)
if err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
en := getEngine(cfg, rs, pr)
en = en.WithFirst(hl.Init)
if debug {
en = en.WithDebug(nil)
}
_, err = en.Init(ctx)
if err != nil {
fmt.Fprintf(os.Stderr, "engine init exited with error: %v\n", err)
os.Exit(1)
}
err = engine.Loop(ctx, en, os.Stdin, os.Stdout)
if err != nil {
fmt.Fprintf(os.Stderr, "loop exited with error: %v\n", err)
fmt.Fprintf(os.Stderr, "Server error: %s", err)
os.Exit(1)
}
}