Init

webcontroller/filePreview.go

@@ -0,0 +1,140 @@
+package webcontroller
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"path/filepath"
+	"strings"
+
+	"fornaxian.com/pixeldrain-web/conf"
+	"fornaxian.com/pixeldrain-web/pixelapi"
+
+	"github.com/julienschmidt/httprouter"
+)
+
+// ServeFilePreview controller for GET /u/:id/preview
+func ServeFilePreview(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
+	if p.ByName("id") == "demo" {
+		ServeFilePreviewDemo(w) // Required for a-ads.com quality check
+		return
+	}
+
+	inf := pixelapi.GetFileInfo(p.ByName("id")) // TODO: Error handling
+	if inf == nil {
+		ServeNotFound(w, r)
+		return
+	}
+
+	var fp FilePreview
+	io.WriteString(w, fp.Run(inf))
+}
+
+type FilePreview struct {
+	FileInfo    *pixelapi.FileInfo
+	FileURL     string
+	DownloadURL string
+}
+
+func (f FilePreview) Run(inf *pixelapi.FileInfo) string {
+	f.FileInfo = inf
+	f.FileURL = conf.ApiURL() + "/file/" + f.FileInfo.ID
+	f.DownloadURL = conf.ApiURL() + "/file/" + f.FileInfo.ID + "/download"
+
+	if strings.HasPrefix(f.FileInfo.MimeType, "image") {
+		return f.image()
+	}
+	if strings.HasPrefix(f.FileInfo.MimeType, "video") {
+		return f.video()
+	}
+	if strings.HasPrefix(f.FileInfo.MimeType, "audio") {
+		return f.audio()
+	}
+
+	switch f.FileInfo.MimeType {
+	case
+		"application/ogg":
+		return f.audio()
+	case
+		"application/matroska",
+		"application/x-matroska":
+		return f.video()
+	case
+		"application/pdf",
+		"application/x-pdf":
+		return f.pdf()
+	case
+		"application/octet-stream": // Fallback for when mime type not recognized
+		switch filepath.Ext(f.FileInfo.FileName) {
+		case
+			".mp3":
+			return f.audio()
+		case
+			".mp4":
+			return f.video()
+		}
+	}
+
+	// none of the mime type checks triggered, so we return the default page
+	return f.def()
+}
+
+func (f FilePreview) image() string {
+	return fmt.Sprintf(`<div class="image-container">
+<img id="displayImg" src="%s" class="pannable drop-shadow"/>
+</div>
+<script src="/res/viewer-scripts/image.js"></script>`,
+		f.FileURL)
+}
+
+func (f FilePreview) audio() string {
+	return fmt.Sprintf(`<div class="image-container">
+<br/><br/>
+<img src="/res/img/mime/audio.png" alt="Audio"/>
+<br/>%s<br/><br/>
+<audio id="audioPlayer" controls="controls" autoplay="autoplay" style="width:90%%;">
+<source src="%s" />
+</audio>
+</div>
+<script src="/res/viewer-scripts/audio.js"></script>`,
+		f.FileInfo.FileName,
+		f.FileURL,
+	)
+}
+
+func (f FilePreview) video() string {
+	return fmt.Sprintf(`<div class="image-container">
+<video id="videoPlayer" autoplay="autoplay" controls="controls" class="center drop-shadow">
+<source src="%s"/>
+Your web browser does not support the HTML video tag.
+</video>
+</div>
+<script src="/res/viewer-scripts/video.js"></script>`,
+		f.FileURL,
+	)
+
+}
+
+func (f FilePreview) pdf() string {
+	u, _ := url.Parse(f.FileURL)
+	return f.frame("/res/misc/pdf-viewer/web/viewer.html?file=" + u.String())
+}
+
+func (f FilePreview) frame(url string) string {
+	return fmt.Sprintf(`<iframe src="%s" class="image-container"
+seamless="seamless" frameborder="0" allowtransparency="true"
+</iframe>`,
+		url,
+	)
+}
+
+func (f FilePreview) def() string {
+	return fmt.Sprintf(
+		`%s<br/>%s<br/><a href="%s"><img src="%s" class="image"></a>`,
+		f.FileInfo.FileName,
+		f.FileInfo.MimeType,
+		f.DownloadURL,
+		f.FileInfo.Thumbnail,
+	)
+}