145 lines
3.2 KiB
Go
145 lines
3.2 KiB
Go
package http
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
|
|
"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"
|
|
)
|
|
|
|
var (
|
|
logg = logging.NewVanilla().WithDomain("httpserver")
|
|
)
|
|
|
|
type RequestParser interface {
|
|
GetSessionId(rq *http.Request) (string, error)
|
|
GetInput(rq *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 := ioutil.ReadAll(rq.Body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return v, nil
|
|
}
|
|
|
|
type SessionHandler struct {
|
|
cfgTemplate engine.Config
|
|
rp RequestParser
|
|
rs resource.Resource
|
|
first resource.EntryFunc
|
|
provider StorageProvider
|
|
}
|
|
|
|
func NewSessionHandler(cfg engine.Config, rs resource.Resource, stateDb db.Db, userdataDb db.Db, rp RequestParser, first resource.EntryFunc) *SessionHandler {
|
|
return &SessionHandler{
|
|
cfgTemplate: cfg,
|
|
rs: rs,
|
|
first: first,
|
|
rp: rp,
|
|
provider: NewSimpleStorageProvider(stateDb, userdataDb),
|
|
}
|
|
}
|
|
|
|
func(f *SessionHandler) 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* SessionHandler) Shutdown() {
|
|
err := f.provider.Close()
|
|
if err != nil {
|
|
logg.Errorf("handler shutdown error", "err", err)
|
|
}
|
|
}
|
|
|
|
func(f *SessionHandler) 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()
|
|
cfg := f.cfgTemplate
|
|
cfg.SessionId = sessionId
|
|
|
|
logg.InfoCtxf(ctx, "new request", "session", cfg.SessionId, "input", input)
|
|
|
|
storage, err := f.provider.Get(cfg.SessionId)
|
|
if err != nil {
|
|
f.writeError(w, 500, "Storage retrieval fail", err)
|
|
return
|
|
}
|
|
defer f.provider.Put(cfg.SessionId, storage)
|
|
en := getEngine(cfg, f.rs, storage.Persister)
|
|
en = en.WithFirst(f.first)
|
|
if cfg.EngineDebug {
|
|
en = en.WithDebug(nil)
|
|
}
|
|
|
|
r, err = en.Init(ctx)
|
|
if err != nil {
|
|
f.writeError(w, 500, "Engine init fail", err)
|
|
return
|
|
}
|
|
if r && len(input) > 0 {
|
|
r, err = en.Exec(ctx, input)
|
|
}
|
|
if err != nil {
|
|
f.writeError(w, 500, "Engine 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
|
|
}
|
|
err = en.Finish()
|
|
if err != nil {
|
|
f.writeError(w, 500, "Engine finish fail", err)
|
|
return
|
|
}
|
|
|
|
_ = r
|
|
}
|
|
|
|
func getEngine(cfg engine.Config, rs resource.Resource, pr *persist.Persister) *engine.DefaultEngine {
|
|
en := engine.NewEngine(cfg, rs)
|
|
en = en.WithPersister(pr)
|
|
return en
|
|
}
|