forked from mbk-lab/rui_orig
Added DownloadFile... functions
This commit is contained in:
anoshenko
parent
79fb34f29f
commit
a98d97ea8d
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@ -1327,3 +1327,12 @@ function mediaSetVolume(elementId, volume) {
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element.volume = volume
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}
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}
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function startDowndload(url, filename) {
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var element = document.getElementById("ruiDownloader");
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if (element) {
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element.href = url;
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element.setAttribute("download", filename);
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element.click();
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}
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}
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@ -1,15 +1,19 @@
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package rui
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import (
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"bytes"
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_ "embed"
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"fmt"
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"io"
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"log"
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"math/rand"
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"net/http"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"strconv"
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"time"
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)
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//go:embed app_scripts.js
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@ -67,6 +71,7 @@ func (app *application) getStartPage() string {
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<body>
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<div class="ruiRoot" id="ruiRootView"></div>
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<div class="ruiPopupLayer" id="ruiPopupLayer" style="visibility: hidden;" onclick="clickOutsidePopup(event)"></div>
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<a id="ruiDownloader" download style="display: none;"></a>
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</body>
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</html>`)
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@ -129,7 +134,8 @@ func (app *application) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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filename = filename[:size-1]
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}
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if !serveResourceFile(filename, w, req) {
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if !serveResourceFile(filename, w, req) &&
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!serveDownloadFile(filename, w, req) {
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w.WriteHeader(http.StatusNotFound)
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}
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}
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@ -295,3 +301,62 @@ func OpenBrowser(url string) bool {
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return err != nil
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}
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type downloadFile struct {
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filename string
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path string
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data []byte
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}
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var currentDownloadId = int(rand.Int31())
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var downloadFiles = map[string]downloadFile{}
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func (session *sessionData) startDownload(file downloadFile) {
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currentDownloadId++
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id := strconv.Itoa(currentDownloadId)
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downloadFiles[id] = file
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session.runScript(fmt.Sprintf(`startDowndload("%s", "%s")`, id, file.filename))
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}
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func serveDownloadFile(id string, w http.ResponseWriter, r *http.Request) bool {
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if file, ok := downloadFiles[id]; ok {
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delete(downloadFiles, id)
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if file.data != nil {
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http.ServeContent(w, r, file.filename, time.Now(), bytes.NewReader(file.data))
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return true
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} else if _, err := os.Stat(file.path); err == nil {
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http.ServeFile(w, r, file.path)
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return true
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}
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}
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return false
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}
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// DownloadFile starts downloading the file on the client side.
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func (session *sessionData) DownloadFile(path string) {
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if _, err := os.Stat(path); err != nil {
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ErrorLog(err.Error())
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return
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}
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_, filename := filepath.Split(path)
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session.startDownload(downloadFile{
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filename: filename,
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path: path,
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data: nil,
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})
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}
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// DownloadFileData starts downloading the file on the client side. Arguments specify the name of the downloaded file and its contents
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func (session *sessionData) DownloadFileData(filename string, data []byte) {
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if data == nil {
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ErrorLog("Invalid download data. Must be not nil.")
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return
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}
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session.startDownload(downloadFile{
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filename: filename,
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path: "",
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data: data,
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})
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}
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@ -6,18 +6,24 @@ import (
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const filePickerDemoText = `
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GridLayout {
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width = 100%, height = 100%, cell-height = "auto, 1fr",
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width = 100%, height = 100%, cell-height = "auto, 1fr", cell-width = "1fr, auto",
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content = [
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FilePicker {
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id = filePicker, accept = "txt, html"
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},
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Button {
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id = fileDownload, row = 0, column = 1, content = "Download file", disabled = true,
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}
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EditView {
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id = selectedFileData, row = 1, type = multiline, read-only = true, wrap = true,
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id = selectedFileData, row = 1, column = 0:1, type = multiline, read-only = true, wrap = true,
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}
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]
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}
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`
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var downloadedFile []byte = nil
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var downloadedFilename = ""
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func createFilePickerDemo(session rui.Session) rui.View {
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view := rui.CreateViewFromText(session, filePickerDemoText)
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if view == nil {
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@ -28,12 +34,20 @@ func createFilePickerDemo(session rui.Session) rui.View {
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if len(files) > 0 {
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picker.LoadFile(files[0], func(file rui.FileInfo, data []byte) {
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if data != nil {
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downloadedFile = data
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downloadedFilename = files[0].Name
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rui.Set(view, "selectedFileData", rui.Text, string(data))
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rui.Set(view, "fileDownload", rui.Disabled, false)
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} else {
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rui.Set(view, "selectedFileData", rui.Text, rui.LastError())
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}
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})
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}
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})
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rui.Set(view, "fileDownload", rui.ClickEvent, func() {
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view.Session().DownloadFileData(downloadedFilename, downloadedFile)
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})
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return view
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}
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@ -53,6 +53,9 @@ type Session interface {
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// a description of the error is written to the log
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Set(viewID, tag string, value interface{}) bool
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DownloadFile(path string)
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DownloadFileData(filename string, data []byte)
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registerAnimation(props []AnimatedProperty) string
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resolveConstants(value string) (string, bool)
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