92 lines
2.0 KiB
Go
92 lines
2.0 KiB
Go
package main
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import "sync"
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import "path"
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import "net/http"
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import "html/template"
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import "hnakra/service"
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type Post struct {
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Author, Content string
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Next *Post
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}
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type Board struct {
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service.Service
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root string
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mux *http.ServeMux
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template *template.Template
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postsMutex sync.RWMutex
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posts *Post
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}
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func main () {
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board := Board { root: "/board/" }
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board.mux = http.NewServeMux()
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board.Service = service.Service {
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&service.HTTP {
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Mount: service.M (
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"Board",
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"A board where you can post things.",
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"@", board.root),
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Handler: board.mux,
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},
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}
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handle := func (pattern string, handler func (http.ResponseWriter, *http.Request)) {
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board.mux.HandleFunc(pattern, handler)
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}
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handle(board.root, board.serveHome)
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handle(path.Join(board.root, "actionPost"), board.serveActionPost)
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board.template = template.Must(template.New("board").Parse(tem))
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board.Run()
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}
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func (board *Board) getPosts (max int) []*Post {
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board.postsMutex.RLock()
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defer board.postsMutex.RUnlock()
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posts := make([]*Post, max)
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count := 0
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current := board.posts
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for current != nil && count < max {
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posts[count] = current
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count ++
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current = current.Next
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}
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return posts[:count]
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}
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func (board *Board) serveHome (res http.ResponseWriter, req *http.Request) {
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if req.URL.Path != board.root {
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http.NotFoundHandler().ServeHTTP(res, req)
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return
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}
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res.Header().Add("content-type", "text/html")
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res.WriteHeader(http.StatusOK)
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board.template.ExecuteTemplate(res, "pageHome", board.getPosts(16))
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}
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func (board *Board) serveActionPost (res http.ResponseWriter, req *http.Request) {
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if req.Method != "POST" {
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res.Header().Add("content-type", "text/plain")
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res.WriteHeader(http.StatusMethodNotAllowed)
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res.Write([]byte("Method not allowed"))
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return
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}
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defer http.Redirect(res, req, board.root, http.StatusSeeOther)
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req.ParseForm()
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author := req.PostFormValue("author")
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content := req.PostFormValue("content")
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board.posts = &Post {
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Author: author,
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Content: content,
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Next: board.posts,
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}
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}
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