first version
This commit is contained in:
Aurélie Delhaie
148
server/server.go
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148
server/server.go
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@@ -0,0 +1,148 @@
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package server
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import (
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"embed"
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_ "embed"
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"errors"
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"fmt"
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"github.com/go-chi/chi/v5"
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"github.com/go-chi/chi/v5/middleware"
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"github.com/mileusna/useragent"
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"html/template"
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"log"
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"net/http"
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"os"
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"retroHub/data"
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"strings"
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)
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type injector struct {
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Version string
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}
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type userAgentInjector struct {
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injector
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UserAgent useragent.UserAgent
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}
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type providerInjector struct {
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injector
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Provider data.Provider
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}
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type errorInjector struct {
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injector
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StatusCode int
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StatusText string
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}
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const version string = "0.1"
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//go:embed templates
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var templates embed.FS
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var (
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provider data.Provider
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indexTemplate *template.Template
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uaTemplate *template.Template
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errTemplate *template.Template
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errLog *log.Logger
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)
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func init() {
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indexTemplate = template.Must(template.ParseFS(templates, "templates/base.html", "templates/index.html"))
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uaTemplate = template.Must(template.ParseFS(templates, "templates/base.html", "templates/ua.html"))
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errTemplate = template.Must(template.ParseFS(templates, "templates/base.html", "templates/error.html"))
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errLog = log.New(os.Stderr, "", log.LstdFlags)
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}
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func Serve(contentProvider data.Provider, port uint) error {
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if contentProvider == nil {
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return errors.New("content provider cannot be nil")
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}
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provider = contentProvider
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r := chi.NewRouter()
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r.Use(middleware.Logger)
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r.Use(panicHandler)
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r.NotFound(notFoundHandler)
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r.Get("/", indexHandler)
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r.Get("/ua", userAgentHandler)
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log.Printf("the server is up and running on %d", port)
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err := http.ListenAndServe(fmt.Sprintf(":%d", port), r)
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if err != nil {
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return err
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}
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return nil
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}
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func panicHandler(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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defer func() {
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if r := recover(); r != nil {
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errLog.Println("ERROR", r)
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injectedData := errorInjector{
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injector: injector{
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Version: version,
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},
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StatusCode: http.StatusInternalServerError,
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StatusText: "Internal Server Error",
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}
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w.WriteHeader(http.StatusInternalServerError)
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err := errTemplate.ExecuteTemplate(w, "base", injectedData)
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if err != nil {
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errLog.Println("ERROR", err)
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}
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}
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}()
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next.ServeHTTP(w, r)
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})
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}
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func indexHandler(w http.ResponseWriter, r *http.Request) {
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injectedData := providerInjector{
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injector: injector{
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Version: version,
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},
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Provider: provider,
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}
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err := indexTemplate.ExecuteTemplate(w, "base", injectedData)
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if err != nil {
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errLog.Println("ERROR", err)
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}
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}
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func userAgentHandler(w http.ResponseWriter, r *http.Request) {
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injectedData := userAgentInjector{
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injector: injector{
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Version: version,
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},
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}
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userAgent := strings.TrimSpace(r.UserAgent())
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if len(userAgent) > 0 {
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injectedData.UserAgent = useragent.Parse(userAgent)
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}
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err := uaTemplate.ExecuteTemplate(w, "base", injectedData)
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if err != nil {
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errLog.Println("ERROR", err)
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}
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}
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func notFoundHandler(w http.ResponseWriter, _ *http.Request) {
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injectedData := errorInjector{
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injector: injector{
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Version: version,
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},
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StatusCode: http.StatusNotFound,
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StatusText: "Not Found",
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}
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w.WriteHeader(http.StatusNotFound)
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err := errTemplate.ExecuteTemplate(w, "base", injectedData)
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if err != nil {
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errLog.Println("ERROR", err)
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}
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}
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19
server/templates/base.html
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19
server/templates/base.html
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{{ define "base" }}
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<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html lang="en">
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<head>
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<meta charset="UTF-8" content="text/html">
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<title>Retro Hub</title>
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</head>
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<body>
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<h1>Retro Hub</h1>
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<p>Welcome to retro hub, this website reference some tools for older browsers</p>
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<hr/>
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<a href="/">List of websites</a> <a href="/ua">User-Agent information</a>
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<hr/>
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{{ template "content" . }}
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<hr/>
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<p>Retro Hub v{{ .Version }} powered by Go, made by thelilfrog (<a href="https://github.com/mojitaurelie">Github</a>, not available for old systems)</p>
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</body>
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</html>
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{{ end }}
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3
server/templates/error.html
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3
server/templates/error.html
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{{ define "content" }}
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<h1>{{ .StatusCode }} {{ .StatusText }}</h1>
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{{ end }}
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34
server/templates/index.html
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34
server/templates/index.html
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@@ -0,0 +1,34 @@
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{{ define "content" }}
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{{ range $category := .Provider.Categories }}
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{{ $links := $category.Links }}
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<h2>{{ $category.Title }}</h2>
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{{ $length := len $links }} {{ if eq $length 0 }}
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<p>This category is empty for now :(</p>
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{{ else }}
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<table cellpadding="3" border="2" bgcolor="silver">
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<thead>
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<tr>
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<th bgcolor="white">Title</th>
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<th bgcolor="white">Information</th>
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</tr>
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</thead>
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<tbody>
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{{ range $link := $links }}
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<tr>
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<td bgcolor="white">
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<a href="{{$link.URL}}">{{ $link.Title }}</a>
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</td>
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<td bgcolor="white">
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{{ $length := len $link.Description }} {{ if eq $length 0 }}
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<i>No description</i>
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{{ else }}
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{{$link.Description}}
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{{ end }}
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</td>
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</tr>
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{{ end }}
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</tbody>
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</table>
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{{ end }}
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{{ end }}
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{{ end }}
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26
server/templates/ua.html
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26
server/templates/ua.html
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{{ define "content" }}
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{{ $length := len .UserAgent.String }} {{ if eq $length 0 }}
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<i>No User-Agent provided by the browser</i>
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{{ else }}
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<p>Your User-Agent is <b>{{ .UserAgent.String }}</b></p>
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<h3>Detailled information:</h3>
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<ul>
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{{ $length := len .UserAgent.Name }} {{ if not (eq $length 0) }}
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<li>Browser name: <b>{{ .UserAgent.Name }}</b></li>
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{{ end }}
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{{ $length := len .UserAgent.Version }} {{ if not (eq $length 0) }}
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<li>Browser version: <b>{{ .UserAgent.Version }}</b></li>
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{{ end }}
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{{ $length := len .UserAgent.OS }} {{ if not (eq $length 0) }}
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<li>Browser OS: <b>{{ .UserAgent.OS }}</b></li>
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{{ end }}
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{{ $length := len .UserAgent.OSVersion }} {{ if not (eq $length 0) }}
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<li>Browser OS Version: <b>{{ .UserAgent.OSVersion }}</b></li>
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{{ end }}
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{{ $length := len .UserAgent.Device }} {{ if not (eq $length 0) }}
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<li>Device: <b>{{ .UserAgent.Device }}</b></li>
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{{ end }}
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</ul>
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<small>This detailled information is provided by <a href="https://github.com/mileusna/useragent/">github.com/mileusna/useragent</a></small>
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{{ end }}
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{{ end }}
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