mirror of
https://github.com/MichaelMure/git-bug.git
synced 2024-12-16 11:00:42 +03:00
266 lines
6.3 KiB
Go
266 lines
6.3 KiB
Go
package commands
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"os"
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"os/signal"
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"time"
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"github.com/99designs/gqlgen/handler"
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"github.com/gorilla/mux"
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"github.com/phayes/freeport"
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"github.com/skratchdot/open-golang/open"
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"github.com/spf13/cobra"
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"github.com/MichaelMure/git-bug/graphql"
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"github.com/MichaelMure/git-bug/repository"
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"github.com/MichaelMure/git-bug/util/git"
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"github.com/MichaelMure/git-bug/webui"
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)
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var (
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webUIPort int
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webUIOpen bool
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webUINoOpen bool
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)
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const webUIOpenConfigKey = "git-bug.webui.open"
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func runWebUI(cmd *cobra.Command, args []string) error {
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if webUIPort == 0 {
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var err error
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webUIPort, err = freeport.GetFreePort()
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if err != nil {
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return err
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}
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}
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addr := fmt.Sprintf("127.0.0.1:%d", webUIPort)
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webUiAddr := fmt.Sprintf("http://%s", addr)
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router := mux.NewRouter()
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graphqlHandler, err := graphql.NewHandler(repo)
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if err != nil {
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return err
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}
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assetsHandler := &fileSystemWithDefault{
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FileSystem: webui.WebUIAssets,
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defaultFile: "index.html",
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}
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// Routes
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router.Path("/playground").Handler(handler.Playground("git-bug", "/graphql"))
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router.Path("/graphql").Handler(graphqlHandler)
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router.Path("/gitfile/{hash}").Handler(newGitFileHandler(repo))
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router.Path("/upload").Methods("POST").Handler(newGitUploadFileHandler(repo))
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router.PathPrefix("/").Handler(http.FileServer(assetsHandler))
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srv := &http.Server{
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Addr: addr,
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Handler: router,
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}
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done := make(chan bool)
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quit := make(chan os.Signal, 1)
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// register as handler of the interrupt signal to trigger the teardown
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signal.Notify(quit, os.Interrupt)
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go func() {
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<-quit
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fmt.Println("WebUI is shutting down...")
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ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
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defer cancel()
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srv.SetKeepAlivesEnabled(false)
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if err := srv.Shutdown(ctx); err != nil {
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log.Fatalf("Could not gracefully shutdown the WebUI: %v\n", err)
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}
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// Teardown
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err := graphqlHandler.Close()
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if err != nil {
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fmt.Println(err)
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}
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close(done)
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}()
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fmt.Printf("Web UI: %s\n", webUiAddr)
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fmt.Printf("Graphql API: http://%s/graphql\n", addr)
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fmt.Printf("Graphql Playground: http://%s/playground\n", addr)
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fmt.Println("Press Ctrl+c to quit")
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configOpen, err := repo.ReadConfigBool(webUIOpenConfigKey)
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if err == repository.ErrNoConfigEntry {
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// default to true
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configOpen = true
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} else if err != nil {
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return err
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}
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shouldOpen := (configOpen && !webUINoOpen) || webUIOpen
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if shouldOpen {
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err = open.Run(webUiAddr)
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if err != nil {
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fmt.Println(err)
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}
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}
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err = srv.ListenAndServe()
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if err != nil && err != http.ErrServerClosed {
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return err
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}
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<-done
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fmt.Println("WebUI stopped")
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return nil
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}
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// implement a http.FileSystem that will serve a default file when the looked up
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// file doesn't exist. Useful for Single-Page App that implement routing client
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// side, where the server has to return the root index.html file for every route.
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type fileSystemWithDefault struct {
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http.FileSystem
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defaultFile string
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}
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func (fswd *fileSystemWithDefault) Open(name string) (http.File, error) {
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f, err := fswd.FileSystem.Open(name)
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if os.IsNotExist(err) {
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return fswd.FileSystem.Open(fswd.defaultFile)
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}
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return f, err
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}
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// implement a http.Handler that will read and server git blob.
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type gitFileHandler struct {
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repo repository.Repo
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}
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func newGitFileHandler(repo repository.Repo) http.Handler {
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return &gitFileHandler{
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repo: repo,
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}
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}
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func (gfh *gitFileHandler) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
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hash := git.Hash(mux.Vars(r)["hash"])
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if !hash.IsValid() {
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http.Error(rw, "invalid git hash", http.StatusBadRequest)
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return
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}
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// TODO: this mean that the whole file will he buffered in memory
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// This can be a problem for big files. There might be a way around
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// that by implementing a io.ReadSeeker that would read and discard
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// data when a seek is called.
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data, err := gfh.repo.ReadData(git.Hash(hash))
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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return
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}
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http.ServeContent(rw, r, "", time.Now(), bytes.NewReader(data))
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}
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// implement a http.Handler that will accept and store content into git blob.
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type gitUploadFileHandler struct {
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repo repository.Repo
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}
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func newGitUploadFileHandler(repo repository.Repo) http.Handler {
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return &gitUploadFileHandler{
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repo: repo,
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}
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}
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func (gufh *gitUploadFileHandler) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
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// 100MB (github limit)
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var maxUploadSize int64 = 100 * 1000 * 1000
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r.Body = http.MaxBytesReader(rw, r.Body, maxUploadSize)
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if err := r.ParseMultipartForm(maxUploadSize); err != nil {
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http.Error(rw, "file too big (100MB max)", http.StatusBadRequest)
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return
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}
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file, _, err := r.FormFile("uploadfile")
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if err != nil {
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http.Error(rw, "invalid file", http.StatusBadRequest)
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return
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}
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defer file.Close()
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fileBytes, err := ioutil.ReadAll(file)
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if err != nil {
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http.Error(rw, "invalid file", http.StatusBadRequest)
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return
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}
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filetype := http.DetectContentType(fileBytes)
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if filetype != "image/jpeg" && filetype != "image/jpg" &&
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filetype != "image/gif" && filetype != "image/png" {
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http.Error(rw, "invalid file type", http.StatusBadRequest)
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return
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}
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hash, err := gufh.repo.StoreData(fileBytes)
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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return
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}
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type response struct {
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Hash string `json:"hash"`
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}
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resp := response{Hash: string(hash)}
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js, err := json.Marshal(resp)
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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return
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}
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rw.Header().Set("Content-Type", "application/json")
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_, err = rw.Write(js)
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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return
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}
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}
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var webUICmd = &cobra.Command{
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Use: "webui",
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Short: "Launch the web UI.",
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Long: `Launch the web UI.
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Available git config:
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git-bug.webui.open [bool]: control the automatic opening of the web UI in the default browser
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`,
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PreRunE: loadRepo,
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RunE: runWebUI,
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}
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func init() {
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RootCmd.AddCommand(webUICmd)
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webUICmd.Flags().SortFlags = false
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webUICmd.Flags().BoolVar(&webUIOpen, "open", false, "Automatically open the web UI in the default browser")
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webUICmd.Flags().BoolVar(&webUINoOpen, "no-open", false, "Prevent the automatic opening of the web UI in the default browser")
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webUICmd.Flags().IntVarP(&webUIPort, "port", "p", 0, "Port to listen to (default is random)")
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}
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