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Initial commit converting git to mercurial
author Alfred Burgess <aburgess@ucc.asn.au>
date Sun, 14 Apr 2024 19:35:23 +0800
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0
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1 package main
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2
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3 import (
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4 "os"
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5 "fmt"
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6 "errors"
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7 "html/template"
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8 "log"
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9 "net/http"
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10 "regexp"
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11 )
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12
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13 type ApiReq struct {
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14 endpoint string
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15 }
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16
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17 type Page struct {
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18 Title string
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19 Content []byte
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20 }
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21
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22 func (p *Page) save() error {
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23 filename := p.Title + ".txt"
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24 return os.WriteFile(filename, p.Content, 0600)
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25 }
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26
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27 func loadPage(title string) ( *Page, error ) {
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28 filename := title + ".txt"
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29 body, err := os.ReadFile(filename)
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30 if err != nil {
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31 return nil, err
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32 }
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33 return &Page{Title: title, Content: body}, nil
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34 }
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35
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36 func renderTemplate(w http.ResponseWriter, tmpl string, p *Page) {
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37 t, err := template.ParseFiles( "views/" + tmpl + ".html" )
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38 if err != nil {
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39 http.Error( w, err.Error(), http.StatusInternalServerError )
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40 return
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41 }
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42 err = t.Execute( w, p )
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43 if err != nil {
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44 http.Error( w, err.Error(), http.StatusInternalServerError )
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45 return
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46 }
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47 }
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48
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49 func apiHandler(w http.ResponseWriter, r *http.Request) {
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50 endpoint, _ := getTitle( w, r )
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51 log.Printf(`API Request: %s`, endpoint )
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52 }
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53
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54 func errorViewHandler(w http.ResponseWriter, r *http.Request) {
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55 title, _ := getTitle( w, r )
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56 log.Printf( `Rendering error page: %s`, title )
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57 p := &Page{ Title: title }
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58 renderTemplate( w, "error", p )
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59 }
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60 func viewHandler(w http.ResponseWriter, r *http.Request) {
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61 title, err := getTitle( w, r )
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62 if err != nil { title = "404" }
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63 log.Printf( `Rendering page: %s`, title )
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64 p, err := loadPage( title )
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65 if err != nil {
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66 http.Redirect( w, r, "/error/404", http.StatusFound )
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67 return
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68 }
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69 renderTemplate( w, "test", p )
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70 }
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71
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72 var validPath = regexp.MustCompile( "^/(view|error|api)/([a-zA-Z0-9]+)$" )
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73 func getTitle( w http.ResponseWriter, r *http.Request ) ( string, error ) {
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74 m := validPath.FindStringSubmatch( r.URL.Path )
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75 if m == nil {
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76 http.NotFound( w, r )
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77 return "", errors.New("Unsupported Route")
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78 }
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79 return m[2], nil
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80 }
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81
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82 func main() {
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83 http.HandleFunc("/view/", viewHandler)
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84 http.HandleFunc("/error/", errorViewHandler)
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85 http.HandleFunc("/api/", apiHandler)
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86
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87 fmt.Printf("Server Running")
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88
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89 log.Fatal(http.ListenAndServe(":8080", nil))
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90 }
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91