site.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
package main import ( "fmt" "io/ioutil" "math/rand" "net/http" "net/url" "path/filepath" "strings" "text/template" "git.j3s.sh/vore/lib" "git.j3s.sh/vore/reaper" "git.j3s.sh/vore/sqlite" "github.com/SlyMarbo/rss" "golang.org/x/crypto/bcrypt" ) type Site struct { // title of the website title string // contains every single feed reaper *reaper.Reaper // site database handle db *sqlite.DB } // New returns a fully populated & ready for action Site func New() *Site { title := "vore" db := sqlite.New(title + ".db") s := Site{ title: title, reaper: reaper.Summon(db), db: db, } go s.reaper.Start() return &s } func (s *Site) indexHandler(w http.ResponseWriter, r *http.Request) { if !s.methodAllowed(w, r, "GET") { return } if s.loggedIn(r) { http.Redirect(w, r, "/"+s.username(r), http.StatusSeeOther) } else { s.renderPage(w, r, "index", nil) } } func (s *Site) loginHandler(w http.ResponseWriter, r *http.Request) { if !s.methodAllowed(w, r, "GET", "POST") { return } if r.Method == "GET" { if s.loggedIn(r) { http.Redirect(w, r, "/", http.StatusSeeOther) } else { s.renderPage(w, r, "login", nil) } } if r.Method == "POST" { username := r.FormValue("username") password := r.FormValue("password") err := s.login(w, username, password) if err != nil { s.renderErr(w, err.Error(), http.StatusUnauthorized) return } http.Redirect(w, r, "/", http.StatusSeeOther) } } // TODO: make this take a POST only in accordance w/ some spec func (s *Site) logoutHandler(w http.ResponseWriter, r *http.Request) { if !s.methodAllowed(w, r, "GET", "POST") { return } http.SetCookie(w, &http.Cookie{ Name: "session_token", Value: "", }) http.Redirect(w, r, "/", http.StatusSeeOther) } func (s *Site) registerHandler(w http.ResponseWriter, r *http.Request) { if !s.methodAllowed(w, r, "POST") { return } username := r.FormValue("username") password := r.FormValue("password") err := s.register(username, password) if err != nil { s.renderErr(w, err.Error(), http.StatusInternalServerError) return } err = s.login(w, username, password) if err != nil { s.renderErr(w, err.Error(), http.StatusInternalServerError) return } http.Redirect(w, r, "/", http.StatusSeeOther) } func (s *Site) userHandler(w http.ResponseWriter, r *http.Request) { if !s.methodAllowed(w, r, "GET") { return } username := strings.TrimPrefix(r.URL.Path, "/") items := s.reaper.SortFeedItemsByDate(s.reaper.GetUserFeeds(username)) data := struct { User string Items []rss.Item }{ User: username, Items: items, } s.renderPage(w, r, "user", data) } func (s *Site) feedsHandler(w http.ResponseWriter, r *http.Request) { if !s.methodAllowed(w, r, "GET") { return } var feeds []rss.Feed if s.loggedIn(r) { feeds = s.reaper.GetUserFeeds(s.username(r)) } s.renderPage(w, r, "feeds", feeds) } // TODO: // // show diff before submission (like tf plan) // check if feed exists in db already? // validate that title exists func (s *Site) feedsSubmitHandler(w http.ResponseWriter, r *http.Request) { if !s.methodAllowed(w, r, "POST") { return } if !s.loggedIn(r) { s.renderErr(w, "", http.StatusUnauthorized) return } // validate user input var validatedURLs []string for _, inputURL := range strings.Split(r.FormValue("submit"), "\r\n") { inputURL = strings.TrimSpace(inputURL) inputURL = strings.ToLower(inputURL) if inputURL == "" { continue } // if the entry is already in reaper, don't validate if s.reaper.HasFeed(inputURL) { validatedURLs = append(validatedURLs, inputURL) continue } if _, err := url.ParseRequestURI(inputURL); err != nil { e := fmt.Sprintf("can't parse url '%s': %s", inputURL, err) s.renderErr(w, e, http.StatusBadRequest) return } validatedURLs = append(validatedURLs, inputURL) } // write to reaper + db for _, u := range validatedURLs { // if it's in reaper, it's in the db, safe to skip if s.reaper.HasFeed(u) { continue } err := s.reaper.Fetch(u) if err != nil { e := fmt.Sprintf("reaper: can't fetch '%s' %s", u, err) s.renderErr(w, e, http.StatusBadRequest) return } s.db.WriteFeed(u) } // subscribe to all listed feeds exclusively s.db.UnsubscribeAll(s.username(r)) for _, url := range validatedURLs { s.db.Subscribe(s.username(r), url) } http.Redirect(w, r, "/feeds", http.StatusSeeOther) } // username fetches a client's username based // on the sessionToken that user has set. username // will return "" if there is no sessionToken. func (s *Site) username(r *http.Request) string { sessionToken, err := r.Cookie("session_token") if err != nil { return "" } username := s.db.GetUsernameBySessionToken(sessionToken.Value) return username } func (s *Site) loggedIn(r *http.Request) bool { if s.username(r) == "" { return false } return true } // login compares the sqlite password field against the user supplied password and // sets a session token against the supplied writer. func (s *Site) login(w http.ResponseWriter, username string, password string) error { if username == "" { return fmt.Errorf("username cannot be nil") } if password == "" { return fmt.Errorf("password cannot be nil") } if !s.db.UserExists(username) { return fmt.Errorf("user does not exist") } storedPassword := s.db.GetPassword(username) err := bcrypt.CompareHashAndPassword([]byte(storedPassword), []byte(password)) if err != nil { return fmt.Errorf("invalid password") } sessionToken := lib.GenerateSessionToken() s.db.SetSessionToken(username, sessionToken) http.SetCookie(w, &http.Cookie{ Name: "session_token", Value: sessionToken, }) return nil } func (s *Site) register(username string, password string) error { if s.db.UserExists(username) { return fmt.Errorf("user '%s' already exists", username) } hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost) if err != nil { return err } err = s.db.AddUser(username, string(hashedPassword)) if err != nil { return err } return nil } // renderPage renders the given page and passes data to the // template execution engine. it's normally the last thing a // handler should do tbh. func (s *Site) renderPage(w http.ResponseWriter, r *http.Request, page string, data any) { funcMap := template.FuncMap{ "printDomain": s.printDomain, } tmplFiles := filepath.Join("files", "*.tmpl.html") tmpl := template.Must(template.New("whatever").Funcs(funcMap).ParseGlob(tmplFiles)) // we read the stylesheet in order to render it inline cssFile := filepath.Join("files", "style.css") stylesheet, err := ioutil.ReadFile(cssFile) if err != nil { panic(err) } // fields on this anon struct are generally // pulled out of Data when they're globally required // callers should jam anything they want into Data pageData := struct { Title string Username string LoggedIn bool StyleSheet string CutePhrase string Data any }{ Title: page + " | " + s.title, Username: s.username(r), LoggedIn: s.loggedIn(r), StyleSheet: string(stylesheet), CutePhrase: s.randomCutePhrase(), Data: data, } err = tmpl.ExecuteTemplate(w, page, pageData) if err != nil { s.renderErr(w, err.Error(), http.StatusInternalServerError) return } } // printDomain does a best-effort uri parse and // prints the base domain, otherwise returning the // unmodified string func (s *Site) printDomain(rawURL string) string { parsedURL, err := url.Parse(rawURL) if err == nil { return parsedURL.Hostname() } // do our best to trim it manually if url parsing fails trimmedStr := strings.TrimSpace(rawURL) trimmedStr = strings.TrimPrefix(trimmedStr, "http://") trimmedStr = strings.TrimPrefix(trimmedStr, "https://") return strings.Split(trimmedStr, "/")[0] } // renderErr sets the correct http status in the header, // optionally decorates certain errors, then renders the err page func (s *Site) renderErr(w http.ResponseWriter, error string, code int) { var prefix string switch code { case http.StatusBadRequest: prefix = "400 bad request\n" case http.StatusUnauthorized: prefix = "401 unauthorized\n" case http.StatusMethodNotAllowed: prefix = "405 method not allowed\n" prefix += "request method: " case http.StatusInternalServerError: prefix = "(╥﹏╥) oopsie woopsie, uwu\n" prefix += "we made a fucky wucky (╥﹏╥)\n\n" prefix += "500 internal server error\n" } fmt.Println(prefix + error) http.Error(w, prefix+error, code) } // methodAllowed takes an http w/r, and returns true if the // http requests method is in teh allowedMethods list. // if methodNotAllowed returns false, it has already // written a request & it's on the caller to close it. func (s *Site) methodAllowed(w http.ResponseWriter, r *http.Request, allowedMethods ...string) bool { allowed := false for _, m := range allowedMethods { if m == r.Method { allowed = true } } if allowed == false { w.Header().Set("Allow", strings.Join(allowedMethods, ", ")) s.renderErr(w, r.Method, http.StatusMethodNotAllowed) } return allowed } func (s *Site) randomCutePhrase() string { phrases := []string{ "nom nom posts (๑ᵔ⤙ᵔ๑)", "^(;,;)^ vawr", "( -_•)╦̵̵̿╤─ - - -- - vore", "devouring feeds since 2023", "tfw new rss post (⊙ _ ⊙ )", "hai! ( ˘͈ ᵕ ˘͈♡)", "voreposting", } i := rand.Intn(len(phrases)) return phrases[i] }