Created
January 24, 2015 08:36
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HTTPサーバーの写経// http://www.slideshare.net/yasi_life/goweb-16448500
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package main | |
import ( | |
"fmt" | |
"net/http" | |
"io/ioutil" | |
"html/template" | |
) | |
type Page struct { | |
Title string | |
Body []byte | |
} | |
func ( p *Page ) save() error { | |
filename := p.Title + ".txt" | |
fmt.Println( "Save", "Title:", p.Title, "filename:", filename, "Body:", string( p.Body ) ) | |
err := ioutil.WriteFile( filename, p.Body, 0600 ) | |
if err != nil { | |
fmt.Println( err ) | |
} | |
return err | |
} | |
func detectTitle( r *http.Request, path string ) string { | |
title := r.URL.Path[ len( path ) : ] | |
if title == "" { | |
title = "index" | |
} | |
fmt.Println( "Title:", title ) | |
return title | |
} | |
func loadPage( title string ) ( *Page, error ) { | |
filename := title + ".txt" | |
body, err := ioutil.ReadFile( filename ) | |
if err != nil { | |
return nil, err | |
} | |
return &Page{ Title: title, Body: body }, nil | |
} | |
func viewHandlerWithPath( w http.ResponseWriter, r *http.Request ) { | |
viewHandler( w, r, "/view/" ) | |
} | |
func viewHandlerWithoutPath( w http.ResponseWriter, r *http.Request ) { | |
viewHandler( w, r, "/" ) | |
} | |
func viewHandler( w http.ResponseWriter, r *http.Request, path string ) { | |
title := detectTitle( r, path ) | |
p, err := loadPage( title ) | |
if err != nil { | |
p = &Page{ Title: title, Body: []byte( "no content" ) } | |
} | |
t, err := template.ParseFiles( "views/view.html" ) | |
t.Execute( w, p ) | |
} | |
func editHandler( w http.ResponseWriter, r *http.Request ) { | |
title := detectTitle( r, "/edit/" ) | |
p, err := loadPage( title ) | |
if err != nil { | |
p = &Page{ Title: title } | |
} | |
t, err := template.ParseFiles( "views/edit.html" ) | |
t.Execute( w, p ) | |
} | |
func saveHandler( w http.ResponseWriter, r *http.Request ) { | |
title := detectTitle( r, "/save/" ) | |
body := r.FormValue( "body" ) | |
p := &Page{ Title: title, Body: []byte( body ) } | |
p.save() | |
http.Redirect( w, r, "/view/" + title, http.StatusFound ) | |
} | |
func main() { | |
http.HandleFunc( "/edit/", editHandler ) | |
http.HandleFunc( "/save/", saveHandler ) | |
http.HandleFunc( "/view/", viewHandlerWithPath ) | |
http.HandleFunc( "/", viewHandlerWithoutPath ) | |
http.ListenAndServe( "localhost:8080", nil ) | |
} |
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<h1>Editing {{ .Title }}</h1> | |
<form action="/save/{{ .Title }}" method="POST"> | |
<div> | |
<textarea name="body" rows="50" cols="80">{{ printf "%s" .Body }}</textarea> | |
</div> | |
<div> | |
<input type="submit" value="Save" /> | |
</div> | |
</form> |
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<h1>{{ .Title }}</h1> | |
<p>[<a href="/edit/{{ .Title }}">edit</a>]</p> | |
<div><pre>{{ printf "%s" .Body }}</pre></div> |
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