// HandlerGet returns info about short URLs.
func HandlerGet(ctx context.Context, w http.ResponseWriter, r *http.Request) core.ErrHandler {
var grs []getRequest
c, err := conf.FromContext(ctx)
if err != nil {
return core.ErrHandler{Err: err, Status: http.StatusInternalServerError}
}
defer r.Body.Close()
decoder := json.NewDecoder(r.Body)
err = decoder.Decode(&grs)
if (err != nil) && (err != io.EOF) {
return core.ErrHandler{Err: err, Status: http.StatusBadRequest}
}
links := []string{}
for i := range grs {
link, err := core.TrimAddress(grs[i].Short)
if err != nil {
c.L.Debug.Printf("invalid short URL [%v] was skipped: %v", link, err)
continue
}
if l, ok := trim.IsShort(link); ok {
links = append(links, l)
}
}
if len(links) == 0 {
return core.ErrHandler{Err: ErrEmptyRequest, Status: http.StatusNoContent}
}
cus, err := trim.MultiLengthen(ctx, links)
if err != nil {
return core.ErrHandler{Err: err, Status: http.StatusInternalServerError}
}
items := make([]addResponseItem, len(cus))
for i, cu := range cus {
id := cu.Cu.String()
items[i] = addResponseItem{
ID: id,
Short: c.Address(id),
Original: cu.Cu.Original,
Err: cu.Err,
}
}
result := &addResponse{
Err: 0,
Msg: "ok",
Result: items,
}
b, err := json.Marshal(result)
if err != nil {
return core.ErrHandler{Err: err, Status: http.StatusInternalServerError}
}
w.Header().Set("Content-Type", "application/json")
fmt.Fprintf(w, "%s", b)
return core.ErrHandler{Err: nil, Status: http.StatusOK}
}
func main() {
var err error
defer func() {
if r := recover(); r != nil {
fmt.Printf("abnormal termination [%v]: %v\n", Version, r)
}
}()
version := flag.Bool("version", false, "show version")
config := flag.String("config", Config, "configuration file")
flag.Parse()
if *version {
fmt.Printf("%v: %v\n\trevision: %v %v\n\tbuild date: %v\n", Name, Version, Revision, runtime.Version(), BuildDate)
return
}
// configuration initialization
cfg, err := conf.Parse(*config)
if err != nil {
log.Panicf("init config error [%v]", err)
}
if err := cfg.Validate(); err != nil {
log.Panicf("config validate error [%v]", err)
}
// check db connection
s, err := db.NewSession(cfg.Conn, true)
if err != nil {
log.Panic(err)
}
s.Close()
defer cfg.Close()
// init users
if err := auth.InitUsers(cfg); err != nil {
log.Panic(err)
}
// set init context
mainCtx := conf.NewContext(cfg)
mainCtx, err = core.RunWorkers(mainCtx)
if err != nil {
log.Panic(err)
}
go core.CleanWorker(cfg)
errc := make(chan error)
go func() {
errc <- interrupt()
}()
listener := net.JoinHostPort(cfg.Listener.Host, fmt.Sprint(cfg.Listener.Port))
cfg.L.Info.Printf("%v running (debug=%v):\n\tlisten: %v\n\tgo version: %v\n\tversion=%v [%v %v]",
Name,
cfg.Debug,
listener,
GoVersion,
Version,
Revision,
BuildDate,
)
server := &http.Server{
Addr: listener,
Handler: http.DefaultServeMux,
ReadTimeout: time.Duration(cfg.Listener.Timeout) * time.Second,
WriteTimeout: time.Duration(cfg.Listener.Timeout) * time.Second,
MaxHeaderBytes: 1 << 20,
ErrorLog: cfg.L.Error,
}
maxSize := cfg.Settings.MaxReqSize << 20
// static files
staticDir, _ := cfg.StaticDir()
http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir(staticDir))))
// keys should not match to trim.IsShortURL pattern (short URLs set)
handlers := map[string]Handler{
"/": {F: core.HandlerIndex, Auth: false, API: false, Method: "ANY"},
"/test/t": {F: core.HandlerTest, Auth: false, API: false, Method: "ANY"},
"/error/notfoud": {F: core.HandlerNotFound, Auth: false, API: false, Method: "GET"},
"/error/common": {F: core.HandlerError, Auth: false, API: false, Method: "GET"},
"/api/noweb": {F: core.HandlerNoWebIndex, Auth: false, API: false, Method: "ANY"},
"/api/info": {F: api.HandlerInfo, Auth: false, API: true, Method: "GET"},
"/api/add": {F: api.HandlerAdd, Auth: false, API: true, Method: "POST"},
"/api/get": {F: api.HandlerGet, Auth: false, API: true, Method: "POST"},
"/api/user/add": {F: api.HandlerUserAdd, Auth: true, API: true, Method: "POST"},
"/api/user/pwd": {F: api.HandlerPwd, Auth: true, API: true, Method: "POST"},
"/api/user/del": {F: api.HandlerUserDel, Auth: true, API: true, Method: "POST"},
"/api/import": {F: api.HandlerImport, Auth: true, API: true, Method: "POST"},
"/api/export": {F: api.HandlerExport, Auth: true, API: true, Method: "POST"},
// "/api/stats"
}
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
path := "/"
if r.URL.Path != path {
path = strings.TrimRight(r.URL.Path, "/")
}
start, code, isAPI := time.Now(), http.StatusOK, false
ctx, cancel := context.WithCancel(mainCtx)
defer func() {
cancel()
switch {
case code == http.StatusNotFound && !isAPI:
core.HandlerNotFound(ctx, w, r)
case code != http.StatusOK && !isAPI:
core.HandlerError(ctx, w, r)
case code != http.StatusOK:
if err := api.HandlerError(w, code); err != nil {
cfg.L.Error.Println(err)
}
}
cfg.L.Info.Printf("%-5v %v\t%-12v\t%v", r.Method, code, time.Since(start), path)
}()
rh, ok := handlers[path]
if ok {
isAPI = rh.API
if (rh.Method != "ANY") && (rh.Method != r.Method) {
code = http.StatusMethodNotAllowed
return
}
if r.ContentLength > maxSize {
code = http.StatusRequestEntityTooLarge
return
}
// API accepts only JSON requests
if ct := r.Header.Get("Content-Type"); isAPI && !strings.HasPrefix(ct, "application/json") {
code = http.StatusBadRequest
return
}
// pre-authentication: quickly check a token value
ctx, err := auth.CheckToken(ctx, r, isAPI)
// anonymous request should be allowed/denied here
authRequired := rh.Auth || !cfg.Settings.Anonymous
if err != nil && (authRequired || err != auth.ErrAnonymous) {
cfg.L.Debug.Printf("authentication error [required=%v]: %v", rh.Auth, err)
code = http.StatusUnauthorized
return
}
// open new database session
s, err := db.NewSession(cfg.Conn, true)
if err != nil {
cfg.L.Error.Println(err)
code = http.StatusInternalServerError
return
}
defer s.Close()
ctx = db.NewContext(ctx, s)
// authentication
ctx, err = auth.Authenticate(ctx)
if err != nil {
cfg.L.Error.Println(err)
code = http.StatusUnauthorized
return
}
// call a found handler
if err := rh.F(ctx, w, r); err.Err != nil {
cfg.L.Error.Println(err)
code = err.Status
return
}
return
} else if link, ok := trim.IsShort(path); ok {
// it's a short URL candidate
if r.Method != "GET" {
code = http.StatusMethodNotAllowed
return
}
origURL, err := core.HandlerRedirect(ctx, link, r)
switch {
case err == nil:
code = http.StatusFound
http.Redirect(w, r, origURL, code)
case err == mgo.ErrNotFound:
code = http.StatusNotFound
default:
cfg.L.Error.Println(err)
code = http.StatusInternalServerError
}
return
}
code = http.StatusNotFound
})
// run server
go func() {
errc <- server.ListenAndServe()
}()
cfg.L.Info.Printf("%v termination, reason[%v]: %v [%v]\n", Name, <-errc, Version, Revision)
}