mirror of https://github.com/anoshenko/rui.git
71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package rui
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import (
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"bytes"
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"math/rand"
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"net/http"
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"os"
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"path/filepath"
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"strconv"
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"time"
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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.callFunc("startDownload", 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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