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|
package commands
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
"os/signal"
"time"
"github.com/MichaelMure/git-bug/graphql"
"github.com/MichaelMure/git-bug/repository"
"github.com/MichaelMure/git-bug/util"
"github.com/MichaelMure/git-bug/webui"
"github.com/gorilla/mux"
"github.com/phayes/freeport"
"github.com/skratchdot/open-golang/open"
"github.com/spf13/cobra"
"github.com/vektah/gqlgen/handler"
)
var port int
func runWebUI(cmd *cobra.Command, args []string) error {
if port == 0 {
var err error
port, err = freeport.GetFreePort()
if err != nil {
return err
}
}
addr := fmt.Sprintf("127.0.0.1:%d", port)
webUiAddr := fmt.Sprintf("http://%s", addr)
router := mux.NewRouter()
graphqlHandler, err := graphql.NewHandler(repo)
if err != nil {
return err
}
// Routes
router.Path("/playground").Handler(handler.Playground("git-bug", "/graphql"))
router.Path("/graphql").Handler(graphqlHandler)
router.Path("/gitfile/{hash}").Handler(newGitFileHandler(repo))
router.Path("/upload").Methods("POST").Handler(newGitUploadFileHandler(repo))
router.PathPrefix("/").Handler(http.FileServer(webui.WebUIAssets))
srv := &http.Server{
Addr: addr,
Handler: router,
}
done := make(chan bool)
quit := make(chan os.Signal, 1)
// register as handler of the interrupt signal to trigger the teardown
signal.Notify(quit, os.Interrupt)
go func() {
<-quit
fmt.Println("WebUI is shutting down...")
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
srv.SetKeepAlivesEnabled(false)
if err := srv.Shutdown(ctx); err != nil {
log.Fatalf("Could not gracefully shutdown the WebUI: %v\n", err)
}
// Teardown
err := graphqlHandler.Close()
if err != nil {
fmt.Println(err)
}
close(done)
}()
fmt.Printf("Web UI: %s\n", webUiAddr)
fmt.Printf("Graphql API: http://%s/graphql\n", addr)
fmt.Printf("Graphql Playground: http://%s/playground\n", addr)
open.Run(webUiAddr)
err = srv.ListenAndServe()
if err != nil && err != http.ErrServerClosed {
return err
}
<-done
fmt.Println("WebUI stopped")
return nil
}
type gitFileHandler struct {
repo repository.Repo
}
func newGitFileHandler(repo repository.Repo) http.Handler {
return &gitFileHandler{
repo: repo,
}
}
func (gfh *gitFileHandler) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
hash := util.Hash(mux.Vars(r)["hash"])
if !hash.IsValid() {
http.Error(rw, "invalid git hash", http.StatusBadRequest)
return
}
// TODO: this mean that the whole file will he buffered in memory
// This can be a problem for big files. There might be a way around
// that by implementing a io.ReadSeeker that would read and discard
// data when a seek is called.
data, err := gfh.repo.ReadData(util.Hash(hash))
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
return
}
http.ServeContent(rw, r, "", time.Now(), bytes.NewReader(data))
}
type gitUploadFileHandler struct {
repo repository.Repo
}
func newGitUploadFileHandler(repo repository.Repo) http.Handler {
return &gitUploadFileHandler{
repo: repo,
}
}
func (gufh *gitUploadFileHandler) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
// 100MB (github limit)
var maxUploadSize int64 = 100 * 1000 * 1000
r.Body = http.MaxBytesReader(rw, r.Body, maxUploadSize)
if err := r.ParseMultipartForm(maxUploadSize); err != nil {
http.Error(rw, "file too big (100MB max)", http.StatusBadRequest)
return
}
file, _, err := r.FormFile("uploadfile")
if err != nil {
http.Error(rw, "invalid file", http.StatusBadRequest)
return
}
defer file.Close()
fileBytes, err := ioutil.ReadAll(file)
if err != nil {
http.Error(rw, "invalid file", http.StatusBadRequest)
return
}
filetype := http.DetectContentType(fileBytes)
if filetype != "image/jpeg" && filetype != "image/jpg" &&
filetype != "image/gif" && filetype != "image/png" {
http.Error(rw, "invalid file type", http.StatusBadRequest)
return
}
hash, err := gufh.repo.StoreData(fileBytes)
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
return
}
type response struct {
Hash string `json:"hash"`
}
resp := response{Hash: string(hash)}
js, err := json.Marshal(resp)
if err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
return
}
rw.Header().Set("Content-Type", "application/json")
rw.Write(js)
}
var webUICmd = &cobra.Command{
Use: "webui",
Short: "Launch the web UI",
RunE: runWebUI,
}
func init() {
RootCmd.AddCommand(webUICmd)
webUICmd.Flags().IntVarP(&port, "port", "p", 0, "Port to listen to")
}
|
