318 lines
8.8 KiB
Go
318 lines
8.8 KiB
Go
package handlers
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"os"
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"strconv"
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"strings"
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"time"
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"github.com/thermokarst/bactdb/Godeps/_workspace/src/github.com/gorilla/context"
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"github.com/thermokarst/bactdb/Godeps/_workspace/src/github.com/gorilla/mux"
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"github.com/thermokarst/bactdb/Godeps/_workspace/src/github.com/nytimes/gziphandler"
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"github.com/thermokarst/bactdb/Godeps/_workspace/src/github.com/thermokarst/jwt"
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"github.com/thermokarst/bactdb/api"
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"github.com/thermokarst/bactdb/auth"
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"github.com/thermokarst/bactdb/errors"
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"github.com/thermokarst/bactdb/helpers"
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"github.com/thermokarst/bactdb/models"
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"github.com/thermokarst/bactdb/types"
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)
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func verifyClaims(claims []byte, r *http.Request) error {
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// TODO: use helper
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currentTime := time.Now()
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var c types.Claims
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err := json.Unmarshal(claims, &c)
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if err != nil {
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return err
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}
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if currentTime.After(time.Unix(c.Exp, 0)) {
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return errors.ErrExpiredToken
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}
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context.Set(r, "claims", c)
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return nil
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}
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// Handler is the root HTTP handler for bactdb.
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func Handler() http.Handler {
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m := mux.NewRouter()
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userService := api.UserService{}
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strainService := api.StrainService{}
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speciesService := api.SpeciesService{}
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characteristicService := api.CharacteristicService{}
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measurementService := api.MeasurementService{}
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m.Handle("/authenticate", tokenHandler(auth.Middleware.Authenticate())).Methods("POST")
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m.Handle("/refresh", auth.Middleware.Secure(errorHandler(tokenRefresh(auth.Middleware)), verifyClaims)).Methods("POST")
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// Everything past here is lumped under a genus
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s := m.PathPrefix("/{genus}").Subrouter()
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s.Handle("/users", errorHandler(handleCreater(userService))).Methods("POST")
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s.Handle("/users/verify/{Nonce}", errorHandler(api.HandleUserVerify)).Methods("GET")
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s.Handle("/users/lockout", errorHandler(api.HandleUserLockout)).Methods("POST")
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s.Handle("/compare", auth.Middleware.Secure(errorHandler(api.HandleCompare), verifyClaims)).Methods("GET")
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type r struct {
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f errorHandler
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m string
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p string
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}
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// Everything past this point requires a valid token
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routes := []r{
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r{handleLister(userService), "GET", "/users"},
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r{handleGetter(userService), "GET", "/users/{ID:.+}"},
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r{handleUpdater(userService), "PUT", "/users/{ID:.+}"},
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r{handleLister(speciesService), "GET", "/species"},
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r{handleCreater(speciesService), "POST", "/species"},
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r{handleGetter(speciesService), "GET", "/species/{ID:.+}"},
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r{handleUpdater(speciesService), "PUT", "/species/{ID:.+}"},
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r{handleDeleter(speciesService), "DELETE", "/species/{ID:.+}"},
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r{handleLister(strainService), "GET", "/strains"},
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r{handleCreater(strainService), "POST", "/strains"},
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r{handleGetter(strainService), "GET", "/strains/{ID:.+}"},
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r{handleUpdater(strainService), "PUT", "/strains/{ID:.+}"},
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r{handleLister(characteristicService), "GET", "/characteristics"},
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r{handleCreater(characteristicService), "POST", "/characteristics"},
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r{handleGetter(characteristicService), "GET", "/characteristics/{ID:.+}"},
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r{handleUpdater(characteristicService), "PUT", "/characteristics/{ID:.+}"},
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r{handleDeleter(characteristicService), "DELETE", "/characteristics/{ID:.+}"},
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r{handleLister(measurementService), "GET", "/measurements"},
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r{handleCreater(measurementService), "POST", "/measurements"},
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r{handleGetter(measurementService), "GET", "/measurements/{ID:.+}"},
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r{handleUpdater(measurementService), "PUT", "/measurements/{ID:.+}"},
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r{handleDeleter(measurementService), "DELETE", "/measurements/{ID:.+}"},
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}
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for _, route := range routes {
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s.Handle(route.p, auth.Middleware.Secure(errorHandler(route.f), verifyClaims)).Methods(route.m)
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}
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return jsonHandler(gziphandler.GzipHandler(corsHandler(m)))
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}
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func handleGetter(g api.Getter) errorHandler {
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return func(w http.ResponseWriter, r *http.Request) *types.AppError {
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id, err := strconv.ParseInt(mux.Vars(r)["ID"], 10, 0)
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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claims := helpers.GetClaims(r)
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e, appErr := g.Get(id, mux.Vars(r)["genus"], &claims)
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if appErr != nil {
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return appErr
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}
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data, err := e.Marshal()
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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w.Write(data)
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return nil
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}
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}
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func handleLister(l api.Lister) errorHandler {
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return func(w http.ResponseWriter, r *http.Request) *types.AppError {
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opt := r.URL.Query()
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opt.Add("Genus", mux.Vars(r)["genus"])
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claims := helpers.GetClaims(r)
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es, appErr := l.List(&opt, &claims)
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if appErr != nil {
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return appErr
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}
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data, err := es.Marshal()
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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w.Write(data)
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return nil
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}
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}
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func handleUpdater(u api.Updater) errorHandler {
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return func(w http.ResponseWriter, r *http.Request) *types.AppError {
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id, err := strconv.ParseInt(mux.Vars(r)["ID"], 10, 0)
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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bodyBytes, err := ioutil.ReadAll(r.Body)
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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e, err := u.Unmarshal(bodyBytes)
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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claims := helpers.GetClaims(r)
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appErr := u.Update(id, &e, mux.Vars(r)["genus"], &claims)
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if appErr != nil {
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return appErr
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}
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data, err := e.Marshal()
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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w.Write(data)
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return nil
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}
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}
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func handleCreater(c api.Creater) errorHandler {
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return func(w http.ResponseWriter, r *http.Request) *types.AppError {
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bodyBytes, err := ioutil.ReadAll(r.Body)
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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e, err := c.Unmarshal(bodyBytes)
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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claims := helpers.GetClaims(r)
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appErr := c.Create(&e, mux.Vars(r)["genus"], &claims)
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if appErr != nil {
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return appErr
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}
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data, err := e.Marshal()
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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w.Write(data)
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return nil
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}
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}
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func handleDeleter(d api.Deleter) errorHandler {
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return func(w http.ResponseWriter, r *http.Request) *types.AppError {
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id, err := strconv.ParseInt(mux.Vars(r)["ID"], 10, 0)
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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claims := helpers.GetClaims(r)
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appErr := d.Delete(id, mux.Vars(r)["genus"], &claims)
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if appErr != nil {
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return appErr
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}
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return nil
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}
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}
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func tokenHandler(h http.Handler) http.Handler {
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token := func(w http.ResponseWriter, r *http.Request) {
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recorder := httptest.NewRecorder()
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h.ServeHTTP(recorder, r)
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for key, val := range recorder.Header() {
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w.Header()[key] = val
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}
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w.Header().Set("Content-Type", "application/json; charset=UTF-8")
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w.WriteHeader(recorder.Code)
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tokenData := string(recorder.Body.Bytes())
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var data []byte
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if recorder.Code != 200 {
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data, _ = json.Marshal(struct {
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Error string `json:"error"`
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}{
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Error: tokenData,
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})
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} else {
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data, _ = json.Marshal(struct {
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Token string `json:"token"`
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}{
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Token: tokenData,
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})
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}
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w.Write(data)
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return
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}
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return http.HandlerFunc(token)
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}
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func corsHandler(h http.Handler) http.Handler {
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cors := func(w http.ResponseWriter, r *http.Request) {
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domains := os.Getenv("DOMAINS")
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allowedDomains := strings.Split(domains, ",")
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if origin := r.Header.Get("Origin"); origin != "" {
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for _, s := range allowedDomains {
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if s == origin {
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w.Header().Set("Access-Control-Allow-Origin", origin)
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w.Header().Set("Access-Control-Allow-Headers", r.Header.Get("Access-Control-Request-Headers"))
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w.Header().Set("Access-Control-Allow-Methods", r.Header.Get("Access-Control-Request-Method"))
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}
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}
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}
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if r.Method != "OPTIONS" {
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h.ServeHTTP(w, r)
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}
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}
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return http.HandlerFunc(cors)
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}
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func jsonHandler(h http.Handler) http.Handler {
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j := func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json; charset=UTF-8")
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h.ServeHTTP(w, r)
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}
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return http.HandlerFunc(j)
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}
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type errorHandler func(http.ResponseWriter, *http.Request) *types.AppError
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func (fn errorHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if err := fn(w, r); err != nil {
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w.WriteHeader(err.Status)
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fmt.Fprintln(w, err.Error.Error())
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}
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}
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func tokenRefresh(j *jwt.Middleware) errorHandler {
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t := func(w http.ResponseWriter, r *http.Request) *types.AppError {
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claims := helpers.GetClaims(r)
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user, err := models.DbGetUserByID(claims.Sub)
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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user.Password = ""
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token, err := auth.Middleware.CreateToken(user.Email)
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if err != nil {
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return newJSONError(err, http.StatusInternalServerError)
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}
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data, _ := json.Marshal(struct {
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Token string `json:"token"`
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}{
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Token: token,
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})
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w.Write(data)
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return nil
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}
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return t
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}
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