GitHub
410
web/web.go
Normal file
410
web/web.go
Normal file
@@ -0,0 +1,410 @@
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package web
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import (
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"embed"
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"encoding/json"
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"fmt"
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"html/template"
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"io"
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"log"
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"net/http"
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"strconv"
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"strings"
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"github.com/gorilla/mux"
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"github.com/tardisx/gropple/config"
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"github.com/tardisx/gropple/download"
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"github.com/tardisx/gropple/version"
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)
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type successResponse struct {
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Success bool `json:"success"`
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Message string `json:"message"`
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}
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type queuedResponse struct {
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Success bool `json:"success"`
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Location string `json:"location"`
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}
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type errorResponse struct {
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Success bool `json:"success"`
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Error string `json:"error"`
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}
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//go:embed data/**
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var webFS embed.FS
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func CreateRoutes(cs *config.ConfigService, dm *download.Manager, vm *version.Manager) *mux.Router {
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r := mux.NewRouter()
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// main index page
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r.HandleFunc("/", homeHandler(cs, vm, dm))
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// update info on the status page
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r.HandleFunc("/rest/fetch", fetchInfoRESTHandler(dm))
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// return static files
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r.HandleFunc("/static/{filename}", staticHandler())
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// return the config page
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r.HandleFunc("/config", configHandler())
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// handle config fetches/updates
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r.HandleFunc("/rest/config", configRESTHandler(cs))
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// create or present a download in the popup
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r.HandleFunc("/fetch", fetchHandler(cs, vm, dm))
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r.HandleFunc("/fetch/{id}", fetchHandler(cs, vm, dm))
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// get/update info on a download
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r.HandleFunc("/rest/fetch/{id}", fetchInfoOneRESTHandler(cs, dm))
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// version information
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r.HandleFunc("/rest/version", versionRESTHandler(vm))
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http.Handle("/", r)
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return r
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}
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// versionRESTHandler returns the version information, if we have up-to-date info from github
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func versionRESTHandler(vm *version.Manager) func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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if vm.GetInfo().GithubVersionFetched {
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b, _ := json.Marshal(vm.GetInfo())
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_, err := w.Write(b)
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if err != nil {
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log.Printf("could not write to client: %s", err)
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}
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} else {
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w.WriteHeader(400)
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}
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}
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}
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// homeHandler returns the main index page
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func homeHandler(cs *config.ConfigService, vm *version.Manager, dm *download.Manager) func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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bookmarkletURL := fmt.Sprintf("javascript:(function(f,s,n,o){window.open(f+encodeURIComponent(s),n,o)}('%s/fetch?url=',window.location,'yourform','width=%d,height=%d'));", cs.Config.Server.Address, cs.Config.UI.PopupWidth, cs.Config.UI.PopupHeight)
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t, err := template.ParseFS(webFS, "data/templates/layout.tmpl", "data/templates/menu.tmpl", "data/templates/index.tmpl")
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if err != nil {
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panic(err)
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}
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type Info struct {
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Manager *download.Manager
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BookmarkletURL template.URL
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Config *config.Config
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Version version.Info
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}
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info := Info{
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Manager: dm,
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BookmarkletURL: template.URL(bookmarkletURL),
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Config: cs.Config,
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Version: vm.GetInfo(),
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}
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dm.Lock.Lock()
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defer dm.Lock.Unlock()
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err = t.ExecuteTemplate(w, "layout", info)
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if err != nil {
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panic(err)
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}
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}
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}
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// staticHandler handles requests for static files
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func staticHandler() func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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filename := vars["filename"]
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if strings.Index(filename, ".js") == len(filename)-3 {
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f, err := webFS.Open("data/js/" + filename)
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if err != nil {
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log.Printf("error accessing %s - %v", filename, err)
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w.WriteHeader(http.StatusNotFound)
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return
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}
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w.WriteHeader(http.StatusOK)
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_, err = io.Copy(w, f)
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if err != nil {
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log.Printf("could not write to client: %s", err)
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}
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return
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}
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w.WriteHeader(http.StatusNotFound)
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}
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}
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// configHandler returns the configuration page
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func configHandler() func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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t, err := template.ParseFS(webFS, "data/templates/layout.tmpl", "data/templates/menu.tmpl", "data/templates/config.tmpl")
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if err != nil {
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panic(err)
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}
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err = t.ExecuteTemplate(w, "layout", nil)
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if err != nil {
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panic(err)
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}
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}
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}
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// configRESTHandler handles both reading and writing of the configuration
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func configRESTHandler(cs *config.ConfigService) func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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if r.Method == "POST" {
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log.Printf("Updating config")
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b, err := io.ReadAll(r.Body)
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if err != nil {
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panic(err)
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}
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err = cs.Config.UpdateFromJSON(b)
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if err != nil {
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errorRes := errorResponse{Success: false, Error: err.Error()}
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errorResB, _ := json.Marshal(errorRes)
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w.WriteHeader(400)
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_, err = w.Write(errorResB)
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if err != nil {
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log.Printf("could not write to client: %s", err)
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}
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return
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}
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cs.WriteConfig()
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}
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b, _ := json.Marshal(cs.Config)
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_, err := w.Write(b)
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if err != nil {
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log.Printf("could not write config to client: %s", err)
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}
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}
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}
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func fetchInfoOneRESTHandler(cs *config.ConfigService, dm *download.Manager) func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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idString := vars["id"]
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if idString != "" {
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id, err := strconv.Atoi(idString)
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if err != nil {
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http.NotFound(w, r)
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return
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}
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thisDownload, err := dm.GetDlById(id)
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if err != nil {
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http.NotFound(w, r)
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return
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}
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if thisDownload == nil {
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panic("should not happen")
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}
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if r.Method == "POST" {
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type updateRequest struct {
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Action string `json:"action"`
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}
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thisReq := updateRequest{}
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b, err := io.ReadAll(r.Body)
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if err != nil {
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panic(err)
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}
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err = json.Unmarshal(b, &thisReq)
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if err != nil {
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errorRes := errorResponse{Success: false, Error: err.Error()}
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errorResB, _ := json.Marshal(errorRes)
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w.WriteHeader(400)
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_, err = w.Write(errorResB)
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if err != nil {
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log.Printf("could not write to client: %s", err)
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}
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return
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}
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if thisReq.Action == "stop" {
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thisDownload.Stop()
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succRes := successResponse{Success: true, Message: "download stopped"}
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succResB, _ := json.Marshal(succRes)
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_, err = w.Write(succResB)
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if err != nil {
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log.Printf("could not write to client: %s", err)
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}
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return
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}
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}
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// just a get, return the object
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thisDownload.Lock.Lock()
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defer thisDownload.Lock.Unlock()
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b, _ := json.Marshal(thisDownload)
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_, err = w.Write(b)
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if err != nil {
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log.Printf("could not write to client: %s", err)
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}
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return
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} else {
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http.NotFound(w, r)
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}
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}
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}
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func fetchInfoRESTHandler(dm *download.Manager) func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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b, err := dm.DownloadsAsJSON()
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if err != nil {
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panic(err)
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}
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_, err = w.Write(b)
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if err != nil {
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log.Printf("could not write to client: %s", err)
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}
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}
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}
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// fetchHandler shows the popup, either the initial form (for create) or the form when in
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// progress (to be updated by REST) - this is determined by GET vs POST
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func fetchHandler(cs *config.ConfigService, vm *version.Manager, dm *download.Manager) func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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log.Printf("fetchHandler ")
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method := r.Method
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// if they refreshed the popup, just load the existing object, don't
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// create a new one
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vars := mux.Vars(r)
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idString := vars["id"]
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idInt, idOK := strconv.ParseInt(idString, 10, 32)
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if method == "GET" && idOK == nil && idInt > 0 {
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// existing, load it up
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log.Printf("loading popup for id %d", idInt)
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dl, err := dm.GetDlById(int(idInt))
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if err != nil {
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log.Printf("not found")
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w.WriteHeader(404)
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return
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}
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t, err := template.ParseFS(webFS, "data/templates/layout.tmpl", "data/templates/popup.tmpl")
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if err != nil {
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panic(err)
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}
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templateData := map[string]interface{}{"dl": dl, "config": cs.Config, "canStop": download.CanStopDownload}
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err = t.ExecuteTemplate(w, "layout", templateData)
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if err != nil {
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panic(err)
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}
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return
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} else if method == "POST" {
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// creating a new one
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type reqType struct {
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URL string `json:"url"`
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ProfileChosen string `json:"profile"`
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DestinationChosen string `json:"destination"`
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}
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req := reqType{}
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json.NewDecoder(r.Body).Decode(&req)
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log.Printf("popup POST request: %#v", req)
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if req.URL == "" {
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w.WriteHeader(400)
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json.NewEncoder(w).Encode(errorResponse{
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Success: false,
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Error: "No URL supplied",
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})
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return
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} else {
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if req.ProfileChosen == "" {
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w.WriteHeader(400)
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json.NewEncoder(w).Encode(errorResponse{
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Success: false,
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Error: "you must choose a profile",
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})
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return
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}
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profile := cs.Config.ProfileCalled(req.ProfileChosen)
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if profile == nil {
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w.WriteHeader(400)
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json.NewEncoder(w).Encode(errorResponse{
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Success: false,
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Error: fmt.Sprintf("no such profile: '%s'", req.ProfileChosen),
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})
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return
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}
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destination := cs.Config.DestinationCalled(req.DestinationChosen)
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if req.DestinationChosen != "" && destination == nil {
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w.WriteHeader(400)
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json.NewEncoder(w).Encode(errorResponse{
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Success: false,
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Error: fmt.Sprintf("no such destination: '%s'", req.DestinationChosen),
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})
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return
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}
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// create the new download
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newDL := download.NewDownload(req.URL, cs.Config)
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id := newDL.Id
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newDL.Destination = destination
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newDL.DownloadProfile = *profile
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dm.AddDownload(newDL)
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dm.Queue(newDL)
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w.WriteHeader(200)
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json.NewEncoder(w).Encode(queuedResponse{
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Success: true,
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Location: fmt.Sprintf("/fetch/%d", id),
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})
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}
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} else {
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// a GET, show the popup so they can start the download (or just close
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// the popup if they didn't mean it)
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log.Print("loading popup for a new download")
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query := r.URL.Query()
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url, present := query["url"]
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if !present {
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w.WriteHeader(400)
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fmt.Fprint(w, "No url supplied")
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return
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}
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t, err := template.ParseFS(webFS, "data/templates/layout.tmpl", "data/templates/popup_create.tmpl")
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if err != nil {
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panic(err)
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}
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templateData := map[string]interface{}{"config": cs.Config, "url": url[0]}
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err = t.ExecuteTemplate(w, "layout", templateData)
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if err != nil {
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panic(err)
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}
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}
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}
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}
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Reference in New Issue
Block a user