2017-06-22 23:37:46 +02:00
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package server
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import (
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2017-07-17 17:48:30 +02:00
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"bytes"
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2017-06-22 23:37:46 +02:00
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"fmt"
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"html"
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2017-06-22 23:37:46 +02:00
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"io"
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"io/ioutil"
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"mime"
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"net/http"
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"os"
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"strings"
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"sync"
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"github.com/jaschaephraim/lrserver"
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"github.com/osteele/gojekyll/site"
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"github.com/osteele/liquid"
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"github.com/pkg/browser"
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)
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// Server serves the site on HTTP.
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type Server struct {
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sync.Mutex
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Site *site.Site
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lr *lrserver.Server
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}
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// Run runs the server.
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func (s *Server) Run(open bool, logger func(label, value string)) error {
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2017-07-07 21:28:51 +02:00
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cfg := s.Site.Config()
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2017-06-29 00:44:39 +02:00
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s.Site.SetAbsoluteURL("")
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address := fmt.Sprintf("%s:%d", cfg.Host, cfg.Port)
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logger("Server address:", "http://"+address+"/")
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2017-07-15 00:40:09 +02:00
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if cfg.Watch {
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if err := s.StartLiveReloader(); err != nil {
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return err
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}
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if err := s.watchAndReload(); err != nil {
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return err
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}
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}
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http.HandleFunc("/", s.handler)
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c := make(chan error)
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go func() {
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c <- http.ListenAndServe(address, nil)
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}()
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logger("Server running...", "press ctrl-c to stop.")
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if open {
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if err := browser.OpenURL("http://" + address); err != nil {
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fmt.Println("Error opening page:", err)
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}
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}
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return <-c
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}
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func (s *Server) handler(rw http.ResponseWriter, r *http.Request) {
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s.Lock()
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defer s.Unlock()
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2017-06-29 00:44:39 +02:00
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var (
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site = s.Site
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urlpath = r.URL.Path
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p, found = site.URLPage(urlpath)
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)
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if !found {
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rw.WriteHeader(http.StatusNotFound)
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p, found = site.Routes["/404.html"]
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}
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if !found {
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fmt.Fprintf(rw, "404 page not found: %s\n", urlpath) // nolint: gas
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return
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}
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mimeType := mime.TypeByExtension(p.OutputExt())
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if mimeType != "" {
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rw.Header().Set("Content-Type", mimeType)
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}
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var w io.Writer = rw
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if strings.HasPrefix(mimeType, "text/html;") {
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w = NewLiveReloadInjector(w)
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}
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2017-07-09 15:37:23 +02:00
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err := site.WriteDocument(w, p)
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if err != nil {
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fmt.Fprintf(os.Stderr, "Error rendering %s: %s\n", urlpath, err)
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eng := liquid.NewEngine()
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excerpt, path := fileErrorContext(err)
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out, e := eng.ParseAndRenderString(renderErrorTemplate, liquid.Bindings{
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"error": err,
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"excerpt": excerpt,
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"path": path,
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"watch": site.Config().Watch,
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})
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if e != nil {
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panic(e)
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}
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if _, err := io.WriteString(w, out); err != nil {
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fmt.Fprintf(os.Stderr, "Error writing HTTP response: %s", err)
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}
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}
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}
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func fileErrorContext(e error) (s, path string) {
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cause, ok := e.(liquid.SourceError)
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if !ok {
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return
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}
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path, n := cause.Path(), cause.LineNumber()
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b, err := ioutil.ReadFile(path)
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if err != nil {
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return
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}
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lines := strings.Split(strings.TrimRight(string(b), "\n"), "\n")
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l0, l1 := n-4, n+4
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w := new(bytes.Buffer)
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for i := l0; i < l1; i++ {
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if i < 0 || len(lines) <= i {
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continue
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}
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var class string
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if i+1 == n {
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class = "error"
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}
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fmt.Fprintf(w, `<span class="line %s"><span class="gutter"></span><span class="lineno">%4d</span>%s<br /></span>`, class, i+1, html.EscapeString(lines[i]))
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}
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return w.String(), path
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}
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// CSS theme adapted from github.com/facebookincubator/create-react-app
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const renderErrorTemplate = `<html><head>
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<style type="text/css">
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body { background-color: black; color: rgb(232, 232, 232); font-family: Menlo, Consolas, monospace; padding: 2rem; line-height: 1.2; }
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h1 { color: #E36049 }
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div { margin: 20px 0; }
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code { font-size: xx-large; }
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.line.error .gutter::before { content: "⚠️"; width: 0; float:left; }
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.line.error, .line.error .lineno { color: red; }
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.lineno { color: #6D7891; border-right: 1px solid #6D7891; padding-right: 10px; margin: 0 10px 0 55px; display: inline-block; text-align: right; }
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footer { border-top: 1px solid #6D7891; margin-top: 5ex; padding-top: 5px; }
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</style>
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</head>
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<body>
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<h1>Failed to render.</h1>
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<div>{{ error }}:</div>
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<code>{{ excerpt }}</code>
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{% if watch and path != "" %}
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<footer>Edit and save “{{ path }}” to reload this page.</footer>
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{% endif %}
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</body>
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</html>`
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