1package commands
2
3import (
4 "bytes"
5 "context"
6 "encoding/json"
7 "fmt"
8 "io/ioutil"
9 "log"
10 "net/http"
11 "os"
12 "os/signal"
13 "time"
14
15 "github.com/MichaelMure/git-bug/graphql"
16 "github.com/MichaelMure/git-bug/repository"
17 "github.com/MichaelMure/git-bug/util"
18 "github.com/MichaelMure/git-bug/webui"
19 "github.com/gorilla/mux"
20 "github.com/phayes/freeport"
21 "github.com/skratchdot/open-golang/open"
22 "github.com/spf13/cobra"
23 "github.com/vektah/gqlgen/handler"
24)
25
26var port int
27
28func runWebUI(cmd *cobra.Command, args []string) error {
29 if port == 0 {
30 var err error
31 port, err = freeport.GetFreePort()
32 if err != nil {
33 return err
34 }
35 }
36
37 addr := fmt.Sprintf("127.0.0.1:%d", port)
38 webUiAddr := fmt.Sprintf("http://%s", addr)
39
40 router := mux.NewRouter()
41
42 graphqlHandler, err := graphql.NewHandler(repo)
43 if err != nil {
44 return err
45 }
46
47 // Routes
48 router.Path("/playground").Handler(handler.Playground("git-bug", "/graphql"))
49 router.Path("/graphql").Handler(graphqlHandler)
50 router.Path("/gitfile/{hash}").Handler(newGitFileHandler(repo))
51 router.Path("/upload").Methods("POST").Handler(newGitUploadFileHandler(repo))
52 router.PathPrefix("/").Handler(http.FileServer(webui.WebUIAssets))
53
54 srv := &http.Server{
55 Addr: addr,
56 Handler: router,
57 }
58
59 done := make(chan bool)
60 quit := make(chan os.Signal, 1)
61
62 // register as handler of the interrupt signal to trigger the teardown
63 signal.Notify(quit, os.Interrupt)
64
65 go func() {
66 <-quit
67 fmt.Println("WebUI is shutting down...")
68
69 ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
70 defer cancel()
71
72 srv.SetKeepAlivesEnabled(false)
73 if err := srv.Shutdown(ctx); err != nil {
74 log.Fatalf("Could not gracefully shutdown the WebUI: %v\n", err)
75 }
76
77 // Teardown
78 err := graphqlHandler.Close()
79 if err != nil {
80 fmt.Println(err)
81 }
82
83 close(done)
84 }()
85
86 fmt.Printf("Web UI: %s\n", webUiAddr)
87 fmt.Printf("Graphql API: http://%s/graphql\n", addr)
88 fmt.Printf("Graphql Playground: http://%s/playground\n", addr)
89
90 open.Run(webUiAddr)
91
92 err = srv.ListenAndServe()
93 if err != nil && err != http.ErrServerClosed {
94 return err
95 }
96
97 <-done
98
99 fmt.Println("WebUI stopped")
100 return nil
101}
102
103type gitFileHandler struct {
104 repo repository.Repo
105}
106
107func newGitFileHandler(repo repository.Repo) http.Handler {
108 return &gitFileHandler{
109 repo: repo,
110 }
111}
112
113func (gfh *gitFileHandler) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
114 hash := util.Hash(mux.Vars(r)["hash"])
115
116 if !hash.IsValid() {
117 http.Error(rw, "invalid git hash", http.StatusBadRequest)
118 return
119 }
120
121 // TODO: this mean that the whole file will he buffered in memory
122 // This can be a problem for big files. There might be a way around
123 // that by implementing a io.ReadSeeker that would read and discard
124 // data when a seek is called.
125 data, err := gfh.repo.ReadData(util.Hash(hash))
126 if err != nil {
127 http.Error(rw, err.Error(), http.StatusInternalServerError)
128 return
129 }
130
131 http.ServeContent(rw, r, "", time.Now(), bytes.NewReader(data))
132}
133
134type gitUploadFileHandler struct {
135 repo repository.Repo
136}
137
138func newGitUploadFileHandler(repo repository.Repo) http.Handler {
139 return &gitUploadFileHandler{
140 repo: repo,
141 }
142}
143
144func (gufh *gitUploadFileHandler) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
145 // 100MB (github limit)
146 var maxUploadSize int64 = 100 * 1000 * 1000
147 r.Body = http.MaxBytesReader(rw, r.Body, maxUploadSize)
148 if err := r.ParseMultipartForm(maxUploadSize); err != nil {
149 http.Error(rw, "file too big (100MB max)", http.StatusBadRequest)
150 return
151 }
152
153 file, _, err := r.FormFile("uploadfile")
154 if err != nil {
155 http.Error(rw, "invalid file", http.StatusBadRequest)
156 return
157 }
158 defer file.Close()
159 fileBytes, err := ioutil.ReadAll(file)
160 if err != nil {
161 http.Error(rw, "invalid file", http.StatusBadRequest)
162 return
163 }
164
165 filetype := http.DetectContentType(fileBytes)
166 if filetype != "image/jpeg" && filetype != "image/jpg" &&
167 filetype != "image/gif" && filetype != "image/png" {
168 http.Error(rw, "invalid file type", http.StatusBadRequest)
169 return
170 }
171
172 hash, err := gufh.repo.StoreData(fileBytes)
173 if err != nil {
174 http.Error(rw, err.Error(), http.StatusInternalServerError)
175 return
176 }
177
178 type response struct {
179 Hash string `json:"hash"`
180 }
181
182 resp := response{Hash: string(hash)}
183
184 js, err := json.Marshal(resp)
185 if err != nil {
186 http.Error(rw, err.Error(), http.StatusInternalServerError)
187 return
188 }
189
190 rw.Header().Set("Content-Type", "application/json")
191 rw.Write(js)
192}
193
194var webUICmd = &cobra.Command{
195 Use: "webui",
196 Short: "Launch the web UI",
197 RunE: runWebUI,
198}
199
200func init() {
201 RootCmd.AddCommand(webUICmd)
202
203 webUICmd.Flags().SortFlags = false
204
205 webUICmd.Flags().IntVarP(&port, "port", "p", 0, "Port to listen to")
206}