180 lines
4.1 KiB
Go
180 lines
4.1 KiB
Go
package main;
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import (
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"context"
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"encoding/json"
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"io/ioutil"
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"net/http"
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"log"
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"os"
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"regexp"
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"strconv"
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"github.com/joho/godotenv"
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"github.com/golang/protobuf/proto"
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"github.com/julienschmidt/httprouter"
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"github.com/nats-io/go-nats"
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)
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const MaxBiteSize = 1024 * 1024 * 10
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var listen string
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var natsHost string
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var secret []byte
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var nats_conn *nats.Conn
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func main() {
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// Load .env
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err := godotenv.Load()
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if err != nil {
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log.Fatal("Error loading .env file")
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}
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listen = os.Getenv("LISTEN")
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natsHost = os.Getenv("NATS")
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s := os.Getenv("SECRET")
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secret = []byte(s)
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//NATS
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n, err := nats.Connect(natsHost)
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if err != nil {
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log.Fatal(err)
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return
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}
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nats_conn = n
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// Routes
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router := httprouter.New()
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router.PUT("/conversation/:key/start/:start", AuthMiddleware(PutBite)) // bites
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router.PUT("/conversation/:key/start/:start/user", AuthMiddleware(PutBiteUser)) // bite_users
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// Start server
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log.Printf("starting server on %s", listen)
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log.Fatal(http.ListenAndServe(listen, router))
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}
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type RawClient struct {
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UserId string `json:"userid"`
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ClientId string `json:"clientid"`
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}
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func AuthMiddleware(next httprouter.Handle) httprouter.Handle {
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return func (w http.ResponseWriter, r *http.Request, p httprouter.Params) {
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ua := r.Header.Get("X-User-Claim")
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if ua == "" {
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http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
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return
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}
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var client RawClient
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err := json.Unmarshal([]byte(ua), &client)
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if err != nil {
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http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
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return
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}
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context := context.WithValue(r.Context(), "user", client)
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next(w, r.WithContext(context), p)
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}
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}
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// TODO: ensure security of regexp
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var validConversationRegexp = regexp.MustCompile(`^[a-zA-Z0-9-]+$`)
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func validConversation(conversation string) bool {
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return validConversationRegexp.MatchString(conversation)
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}
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func ParseStartString(start string) (uint64, error) {
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return strconv.ParseUint(start, 10, 64)
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}
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// Route handlers
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func PutBite(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
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client := r.Context().Value("user").(RawClient)
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c := Client {
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Key: client.UserId,
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Client: client.ClientId,
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}
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start, err := ParseStartString(p.ByName("start"))
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if err != nil {
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http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
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return
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}
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key := p.ByName("key")
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if !validConversation(key) {
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http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
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return
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}
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reader := http.MaxBytesReader(w, r.Body, MaxBiteSize)
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body, err := ioutil.ReadAll(reader)
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if err != nil {
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http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
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return
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}
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b := Bite {
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Start: start,
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Key: key,
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Data: body,
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Client: &c,
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}
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out, err := proto.Marshal(&b)
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if err != nil {
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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log.Print(err)
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return
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}
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nats_conn.Publish("new_bite", out)
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w.WriteHeader(200)
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}
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func PutBiteUser(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
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client := r.Context().Value("user").(RawClient)
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c := Client {
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Key: client.UserId,
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Client: client.ClientId,
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}
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start, err := ParseStartString(p.ByName("start"))
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if err != nil {
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http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
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return
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}
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key := p.ByName("key")
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if !validConversation(key) {
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http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
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return
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}
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reader := http.MaxBytesReader(w, r.Body, MaxBiteSize)
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body, err := ioutil.ReadAll(reader)
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if err != nil {
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http.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
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return
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}
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b := Bite {
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Start: start,
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Key: key,
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Data: body,
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Client: &c,
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}
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out, err := proto.Marshal(&b)
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if err != nil {
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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log.Print(err)
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return
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}
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nats_conn.Publish("new_bite_user", out)
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w.WriteHeader(200)
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}
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