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author | Feuerfuchs <git@feuerfuchs.dev> | 2020-05-18 12:12:43 +0200 |
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committer | Feuerfuchs <git@feuerfuchs.dev> | 2020-05-18 12:12:43 +0200 |
commit | 4bf44b16562335b3d09b6df0150521bb5b5f776f (patch) | |
tree | 576723e6dc9f9db48d0892f7ec354a11b973aef4 /internal/port/main.go | |
parent | Added 2 more glyphs (diff) | |
download | gopherproxy-4bf44b16562335b3d09b6df0150521bb5b5f776f.tar.gz gopherproxy-4bf44b16562335b3d09b6df0150521bb5b5f776f.tar.bz2 gopherproxy-4bf44b16562335b3d09b6df0150521bb5b5f776f.zip |
WIP: Refactoring
Diffstat (limited to 'internal/port/main.go')
-rw-r--r-- | internal/port/main.go | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/internal/port/main.go b/internal/port/main.go new file mode 100644 index 0000000..5cdd794 --- /dev/null +++ b/internal/port/main.go | |||
@@ -0,0 +1,301 @@ | |||
1 | package port | ||
2 | |||
3 | import ( | ||
4 | "crypto/md5" | ||
5 | "fmt" | ||
6 | "html" | ||
7 | "html/template" | ||
8 | "io/ioutil" | ||
9 | "log" | ||
10 | "net/http" | ||
11 | "regexp" | ||
12 | "strings" | ||
13 | |||
14 | "github.com/NYTimes/gziphandler" | ||
15 | "github.com/davidbyttow/govips/pkg/vips" | ||
16 | "github.com/gobuffalo/packr/v2" | ||
17 | "github.com/temoto/robotstxt" | ||
18 | ) | ||
19 | |||
20 | type AssetList struct { | ||
21 | Style string | ||
22 | JS string | ||
23 | FontW string | ||
24 | FontW2 string | ||
25 | PropFontW string | ||
26 | PropFontW2 string | ||
27 | } | ||
28 | |||
29 | type TemplateVariables struct { | ||
30 | Title string | ||
31 | URI string | ||
32 | Assets AssetList | ||
33 | RawText string | ||
34 | Lines []Item | ||
35 | Error bool | ||
36 | Protocol string | ||
37 | } | ||
38 | |||
39 | func DefaultHandler(tpl *template.Template, startpagetext string, assetList AssetList) http.HandlerFunc { | ||
40 | return func(w http.ResponseWriter, req *http.Request) { | ||
41 | if err := tpl.Execute(w, TemplateVariables{ | ||
42 | Title: "Gopher/Gemini proxy", | ||
43 | Assets: assetList, | ||
44 | RawText: startpagetext, | ||
45 | Protocol: "startpage", | ||
46 | }); err != nil { | ||
47 | log.Println("Template error: " + err.Error()) | ||
48 | } | ||
49 | } | ||
50 | } | ||
51 | |||
52 | // RobotsTxtHandler returns the contents of the robots.txt file | ||
53 | // if configured and valid. | ||
54 | func RobotsTxtHandler(robotstxtdata []byte) http.HandlerFunc { | ||
55 | return func(w http.ResponseWriter, req *http.Request) { | ||
56 | if robotstxtdata == nil { | ||
57 | http.Error(w, "Not Found", http.StatusNotFound) | ||
58 | return | ||
59 | } | ||
60 | |||
61 | w.Header().Set("Content-Type", "text/plain") | ||
62 | w.Write(robotstxtdata) | ||
63 | } | ||
64 | } | ||
65 | |||
66 | func FaviconHandler(favicondata []byte) http.HandlerFunc { | ||
67 | return func(w http.ResponseWriter, req *http.Request) { | ||
68 | if favicondata == nil { | ||
69 | http.Error(w, "Not Found", http.StatusNotFound) | ||
70 | return | ||
71 | } | ||
72 | |||
73 | w.Header().Set("Content-Type", "image/vnd.microsoft.icon") | ||
74 | w.Header().Set("Cache-Control", "max-age=2592000") | ||
75 | w.Write(favicondata) | ||
76 | } | ||
77 | } | ||
78 | |||
79 | func StyleHandler(styledata []byte) http.HandlerFunc { | ||
80 | return func(w http.ResponseWriter, req *http.Request) { | ||
81 | w.Header().Set("Content-Type", "text/css") | ||
82 | w.Header().Set("Cache-Control", "max-age=2592000") | ||
83 | w.Write(styledata) | ||
84 | } | ||
85 | } | ||
86 | |||
87 | func JavaScriptHandler(jsdata []byte) http.HandlerFunc { | ||
88 | return func(w http.ResponseWriter, req *http.Request) { | ||
89 | w.Header().Set("Content-Type", "text/javascript") | ||
90 | w.Header().Set("Cache-Control", "max-age=2592000") | ||
91 | w.Write(jsdata) | ||
92 | } | ||
93 | } | ||
94 | |||
95 | func FontHandler(woff2 bool, fontdata []byte) http.HandlerFunc { | ||
96 | return func(w http.ResponseWriter, req *http.Request) { | ||
97 | if fontdata == nil { | ||
98 | http.Error(w, "Not Found", http.StatusNotFound) | ||
99 | return | ||
100 | } | ||
101 | |||
102 | if woff2 { | ||
103 | w.Header().Set("Content-Type", "font/woff2") | ||
104 | } else { | ||
105 | w.Header().Set("Content-Type", "font/woff") | ||
106 | } | ||
107 | w.Header().Set("Cache-Control", "max-age=2592000") | ||
108 | |||
109 | w.Write(fontdata) | ||
110 | } | ||
111 | } | ||
112 | |||
113 | // ListenAndServe creates a listening HTTP server bound to | ||
114 | // the interface specified by bind and sets up a Gopher to HTTP | ||
115 | // proxy proxying requests as requested and by default will prozy | ||
116 | // to a Gopher server address specified by uri if no servers is | ||
117 | // specified by the request. The robots argument is a pointer to | ||
118 | // a robotstxt.RobotsData struct for testing user agents against | ||
119 | // a configurable robots.txt file. | ||
120 | func ListenAndServe(bind, startpagefile string, robotsfile string, robotsdebug bool, vipsconcurrency int) error { | ||
121 | box := packr.New("assets", "../assets") | ||
122 | |||
123 | // | ||
124 | // Robots | ||
125 | |||
126 | var robotsdata *robotstxt.RobotsData | ||
127 | |||
128 | robotstxtdata, err := ioutil.ReadFile(robotsfile) | ||
129 | if err != nil { | ||
130 | log.Printf("error reading robots.txt: %s", err) | ||
131 | robotstxtdata = nil | ||
132 | } else { | ||
133 | robotsdata, err = robotstxt.FromBytes(robotstxtdata) | ||
134 | if err != nil { | ||
135 | log.Printf("error reading robots.txt: %s", err) | ||
136 | robotstxtdata = nil | ||
137 | } | ||
138 | } | ||
139 | |||
140 | // | ||
141 | // Fonts | ||
142 | |||
143 | fontdataw, err := box.Find("iosevka-term-ss03-regular.woff") | ||
144 | if err != nil { | ||
145 | fontdataw = []byte{} | ||
146 | } | ||
147 | fontwAsset := fmt.Sprintf("/iosevka-term-ss03-regular-%x.woff", md5.Sum(fontdataw)) | ||
148 | |||
149 | fontdataw2, err := box.Find("iosevka-term-ss03-regular.woff2") | ||
150 | if err != nil { | ||
151 | fontdataw2 = []byte{} | ||
152 | } | ||
153 | fontw2Asset := fmt.Sprintf("/iosevka-term-ss03-regular-%x.woff2", md5.Sum(fontdataw2)) | ||
154 | |||
155 | propfontdataw, err := box.Find("iosevka-aile-regular.woff") | ||
156 | if err != nil { | ||
157 | propfontdataw = []byte{} | ||
158 | } | ||
159 | propfontwAsset := fmt.Sprintf("/iosevka-aile-regular-%x.woff", md5.Sum(propfontdataw)) | ||
160 | |||
161 | propfontdataw2, err := box.Find("iosevka-aile-regular.woff2") | ||
162 | if err != nil { | ||
163 | propfontdataw2 = []byte{} | ||
164 | } | ||
165 | propfontw2Asset := fmt.Sprintf("/iosevka-aile-regular-%x.woff2", md5.Sum(propfontdataw2)) | ||
166 | |||
167 | // | ||
168 | // Stylesheet | ||
169 | |||
170 | styledata, err := box.Find("style.css") | ||
171 | if err != nil { | ||
172 | styledata = []byte{} | ||
173 | } | ||
174 | styleAsset := fmt.Sprintf("/style-%x.css", md5.Sum(styledata)) | ||
175 | |||
176 | // | ||
177 | // JavaScript | ||
178 | |||
179 | jsdata, err := box.Find("main.js") | ||
180 | if err != nil { | ||
181 | jsdata = []byte{} | ||
182 | } | ||
183 | jsAsset := fmt.Sprintf("/main-%x.js", md5.Sum(jsdata)) | ||
184 | |||
185 | // | ||
186 | // Favicon | ||
187 | |||
188 | favicondata, err := box.Find("favicon.ico") | ||
189 | if err != nil { | ||
190 | favicondata = []byte{} | ||
191 | } | ||
192 | |||
193 | // | ||
194 | // Start page text | ||
195 | |||
196 | startpagedata, err := ioutil.ReadFile(startpagefile) | ||
197 | if err != nil { | ||
198 | startpagedata, err = box.Find("startpage.txt") | ||
199 | if err != nil { | ||
200 | startpagedata = []byte{} | ||
201 | } | ||
202 | } | ||
203 | startpagetext := string(startpagedata) | ||
204 | |||
205 | // | ||
206 | // | ||
207 | |||
208 | var allFiles []string | ||
209 | files, err := ioutil.ReadDir("./tpl") | ||
210 | if err != nil { | ||
211 | fmt.Println(err) | ||
212 | } | ||
213 | for _, file := range files { | ||
214 | filename := file.Name() | ||
215 | if strings.HasSuffix(filename, ".html") { | ||
216 | allFiles = append(allFiles, "./tpl/"+filename) | ||
217 | } | ||
218 | } | ||
219 | |||
220 | templates, err = template.ParseFiles(allFiles...) | ||
221 | |||
222 | // | ||
223 | |||
224 | funcMap := template.FuncMap{ | ||
225 | "safeHtml": func(s string) template.HTML { | ||
226 | return template.HTML(s) | ||
227 | }, | ||
228 | "safeCss": func(s string) template.CSS { | ||
229 | return template.CSS(s) | ||
230 | }, | ||
231 | "safeJs": func(s string) template.JS { | ||
232 | return template.JS(s) | ||
233 | }, | ||
234 | "HTMLEscape": func(s string) string { | ||
235 | return html.EscapeString(s) | ||
236 | }, | ||
237 | "split": strings.Split, | ||
238 | "last": func(s []string) string { | ||
239 | return s[len(s)-1] | ||
240 | }, | ||
241 | "pop": func(s []string) []string { | ||
242 | return s[:len(s)-1] | ||
243 | }, | ||
244 | "replace": func(pattern, output string, input interface{}) string { | ||
245 | var re = regexp.MustCompile(pattern) | ||
246 | var inputStr = fmt.Sprintf("%v", input) | ||
247 | return re.ReplaceAllString(inputStr, output) | ||
248 | }, | ||
249 | "trimLeftChar": func(s string) string { | ||
250 | for i := range s { | ||
251 | if i > 0 { | ||
252 | return s[i:] | ||
253 | } | ||
254 | } | ||
255 | return s[:0] | ||
256 | }, | ||
257 | "hasPrefix": func(s string, prefix string) bool { | ||
258 | return strings.HasPrefix(s, prefix) | ||
259 | }, | ||
260 | "title": func(s string) string { | ||
261 | return strings.Title(s) | ||
262 | }, | ||
263 | } | ||
264 | |||
265 | // | ||
266 | |||
267 | startpageTpl := templates.Lookup("startpage.html").Funcs(funcMap) | ||
268 | geminiTpl := templates.Lookup("gemini.html").Funcs(funcMap) | ||
269 | gopherTpl := templates.Lookup("gopher.html").Funcs(funcMap) | ||
270 | |||
271 | // | ||
272 | // | ||
273 | |||
274 | vips.Startup(&vips.Config{ | ||
275 | ConcurrencyLevel: vipsconcurrency, | ||
276 | }) | ||
277 | |||
278 | assets := AssetList{ | ||
279 | Style: styleAsset, | ||
280 | JS: jsAsset, | ||
281 | FontW: fontwAsset, | ||
282 | FontW2: fontw2Asset, | ||
283 | PropFontW: propfontwAsset, | ||
284 | PropFontW2: propfontw2Asset, | ||
285 | } | ||
286 | |||
287 | http.Handle("/", gziphandler.GzipHandler(DefaultHandler(startpageTpl, startpagetext, assets))) | ||
288 | http.Handle("/gopher/", gziphandler.GzipHandler(GopherHandler(gopherTpl, robotsdata, assets, robotsdebug))) | ||
289 | http.Handle("/gemini/", gziphandler.GzipHandler(GeminiHandler(geminiTpl, robotsdata, assets, robotsdebug))) | ||
290 | http.Handle("/robots.txt", gziphandler.GzipHandler(RobotsTxtHandler(robotstxtdata))) | ||
291 | http.Handle("/favicon.ico", gziphandler.GzipHandler(FaviconHandler(favicondata))) | ||
292 | http.Handle(styleAsset, gziphandler.GzipHandler(StyleHandler(styledata))) | ||
293 | http.Handle(jsAsset, gziphandler.GzipHandler(JavaScriptHandler(jsdata))) | ||
294 | http.HandleFunc(fontwAsset, FontHandler(false, fontdataw)) | ||
295 | http.HandleFunc(fontw2Asset, FontHandler(true, fontdataw2)) | ||
296 | http.HandleFunc(propfontwAsset, FontHandler(false, propfontdataw)) | ||
297 | http.HandleFunc(propfontw2Asset, FontHandler(true, propfontdataw2)) | ||
298 | //http.Handle("/assets/", http.StripPrefix("/assets/", http.FileServer(http.Dir("assets/")))) | ||
299 | |||
300 | return http.ListenAndServe(bind, nil) | ||
301 | } | ||