some ui features for uploading

2017-06-23 15:02:37 -07:00
parent 31515121ec
commit 83236d846f
3 changed files with 135 additions and 2 deletions
@@ -168,6 +168,9 @@ func (ch *CaddyHugo) ServeHTTPWithNext(next httpserver.Handler, c *caddy.Control
 	if strings.HasPrefix(r.URL.Path, "/hugo/media") {
 		return ch.serveMediaPage(w, r)
 	}
+	if strings.HasPrefix(r.URL.Path, "/hugo/upload") {
+		return ch.uploadMedia(w, r)
+	}
 	if strings.HasPrefix(r.URL.Path, "/media/") {
 		return ch.serveMedia(w, r)
 	}
@@ -3,7 +3,9 @@ package caddyhugo
 import (
 	"fmt"
 	"image"
+	_ "image/gif"
 	"image/jpeg"
+	_ "image/png"
 	"io"
 	"net/http"
 	"os"
@@ -24,6 +26,21 @@ func (ms *MediaSource) LocationOrig(m Media) string {
 	return path.Join(ms.StorageDir, m.Name)
 }

+func (ms *MediaSource) receiveNewMedia(name string, r io.Reader) error {
+	dest := path.Join(ms.StorageDir, name)
+	f, err := os.OpenFile(dest, os.O_WRONLY|os.O_CREATE, 0644)
+	if err != nil {
+		return err
+	}
+
+	_, err = io.Copy(f, r)
+	if err != nil {
+		return err
+	}
+
+	return f.Close()
+}
+
 type Media struct {
 	Type string
 	Name string
@@ -122,6 +139,38 @@ func (ms *MediaSource) Walk() ([]*Media, error) {
 	return media, err
 }

+func (ch *CaddyHugo) uploadMedia(w http.ResponseWriter, r *http.Request) (int, error) {
+	if ch.Media == nil {
+		http.NotFound(w, r)
+		return 404, nil
+	}
+
+	mr, err := r.MultipartReader()
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return 400, nil
+	}
+
+	for {
+		part, err := mr.NextPart()
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return 400, nil
+		}
+
+		name := part.FileName()
+		if name != "" {
+			err = ch.Media.receiveNewMedia(name, part)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return 500, nil
+			}
+		}
+	}
+
+	return 200, nil
+}
+
 func (ch *CaddyHugo) serveMediaPage(w http.ResponseWriter, r *http.Request) (int, error) {
 	if ch.Media == nil {
 		http.NotFound(w, r)
@@ -131,7 +180,11 @@ func (ch *CaddyHugo) serveMediaPage(w http.ResponseWriter, r *http.Request) (int
 	io.WriteString(w, `<html>
 	<head><style>.img { float: left; text-align: center; }</style></head>
 	<body>
+	<div style="position: fixed; top: 0; height: 10vh; width: 100%;">
+	<div style="float: left; width: 100%; height: 10vh;">
 	`)
+	io.WriteString(w, UploadPage("media"))
+	io.WriteString(w, "</div>")
 	if ch.Media != nil {
 		media, err := ch.Media.Walk()
 		if err != nil {
@@ -140,10 +193,12 @@ func (ch *CaddyHugo) serveMediaPage(w http.ResponseWriter, r *http.Request) (int
 		}

 		for _, m := range media {
+			fmt.Fprintf(w, `<div class="img">`)
+
 			src, width, height, err := ch.Media.ThumbMax(*m, 100)
 			if err != nil {
-				http.Error(w, err.Error(), http.StatusInternalServerError)
-				return 500, nil
+				fmt.Fprintf(w, `<div class="img">error rendering %q: %v</div>`, m.Name, err)
+				continue
 			}
 			fmt.Fprintf(w, `<div class="img"><img width=%d height=%d src=%q /><br /><input type="text" disabled value=%q /></div>`, width, height, src, src)
 		}
@@ -392,3 +392,78 @@ var AuthorPage = `<html>
 	</ul>
 </body>
 </html>`
+
+func UploadPage(elemName string) string {
+	return fmt.Sprintf(`
+	<input type="file" style="display: hidden;" id="%s" />
+	<div id="%s_dropzone" ondrop="dropHandler(event);" ondragover="draghandler(event);" ondragenter="draghandler(event);" ondragleave="draghandler(event);" style="background-color: rgba(0,0,0,0.5); visibility: hidden; opacity:0; position: fixed; top: 0; bottom: 0; left: 0; right: 0; width: 100%; height: 100%; ; transition: visibility 175ms, opacity 175ms; z-index: 9999999;"></div>
+	<script>
+document.addEventListener("DOMContentLoaded", function () {
+	var fileInput = document.getElementById('%s');
+	var dropzone = document.getElementById('%s_dropzone');
+
+	fileInput.onchange = function () {
+		var formData = new FormData();
+		fileInput.files.forEach(function (file) {
+			formData.append(file.name, file);
+		});
+		upload(formData);
+	}
+
+	var lastTarget = null;
+
+	window.addEventListener("dragenter", function(e)
+	{
+		lastTarget = e.target; // cache the last target here
+		// unhide our dropzone overlay
+		dropzone.style.visibility = "";
+		dropzone.style.opacity = 1;
+	});
+
+	window.addEventListener("dragleave", function(e)
+	{
+		// this is the magic part. when leaving the window,
+		// e.target happens to be exactly what we want: what we cached
+		// at the start, the dropzone we dragged into.
+		// so..if dragleave target matches our cache, we hide the dropzone.
+		if(e.target === lastTarget)
+		{
+			dropzone.style.visibility = "hidden";
+			dropzone.style.opacity = 0;
+		}
+	});
+
+});
+
+	function draghandler(evt) {
+		evt.preventDefault();
+	}
+
+	function dropHandler(evt) {
+		evt.preventDefault();
+
+		var files = evt.dataTransfer.files;
+		var formData = new FormData();
+
+		for (var i = 0; i < files.length; i++) {
+			formData.append(files[i].name, files[i]);
+		}
+
+		upload(formData);
+		return false;
+	}
+
+	function upload(formData) {
+		var xhr = new XMLHttpRequest();
+		xhr.onreadystatechange = function(e) {
+			if ( 4 == this.readyState ) {
+				window.location.reload(true);
+			}
+		}
+		xhr.open('POST', '/hugo/upload');
+		xhr.send(formData);
+	}
+
+</script>
+`, elemName, elemName, elemName, elemName, elemName, elemName)
+}