/
http.go
87 lines (77 loc) · 1.75 KB
/
http.go
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// Copyright 2015 Giulio Iotti. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"errors"
"log"
"mime/multipart"
"net/http"
)
var errInvalidMethod = errors.New("only POST or GET handled")
type server struct {
host string
maxLen int64
cons *consumer
}
func newServer(host string, c *consumer) *server {
return &server{
host: host,
cons: c,
maxLen: 2 * 1024 * 1024,
}
}
func (s *server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != "/" {
http.NotFound(w, r)
log.Print("invalid request to ", r.URL.Path)
return
}
var err error
switch r.Method {
case "POST":
err = s.post(w, r)
case "GET":
err = s.get(w, r)
default:
err = errInvalidMethod
}
if err != nil {
log.Print(err)
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
func (s *server) postFile(f *multipart.FileHeader) error {
fh, err := f.Open()
if err != nil {
return err
}
defer fh.Close()
return s.cons.readAll(fh)
}
func (s *server) post(w http.ResponseWriter, r *http.Request) error {
s.cons.graph.Lock()
defer s.cons.graph.Unlock()
if err := r.ParseMultipartForm(s.maxLen); err != nil {
return err
}
defer r.MultipartForm.RemoveAll()
for _, fg := range r.MultipartForm.File {
for _, file := range fg {
s.postFile(file)
}
}
// TODO: Redirect to GET?
return nil
}
func (s *server) get(w http.ResponseWriter, r *http.Request) error {
s.cons.graph.RLock()
defer s.cons.graph.RUnlock()
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
walker := newWalker(w, s.cons.graph)
walker.seed(walker.any(s.cons.firsts))
return walker.walk()
}
func (s *server) serve() error {
return http.ListenAndServe(s.host, s)
}