In my code I kept making calls to async functions that return future types from
inside a loop. How can I prevent the main thread from finishing before all of
those futures to finish? Note that it's inside a loop that creates are multiple
futures that need finishing.
proc main() {.async.}=
if os.paramCount() < 2:
quit("Argument required. Usage: $threadgrabber <Thread link> <Relative
download directory>")
else:
var
boardAndThread = parseBoardAndThread(os.paramStr(1))
downPath = getCurrentDir() & "/" & os.paramStr(2)
board = boardAndThread[0]
thread = boardAndThread[1]
if not downPath.existsDir():
echo "Local path not recognized. Creating directory: ", downPath
createDir downPath
var
webClient = newAsyncHttpClient()
link = getAPILink(board, thread)
j: string = await webClient.getContent(link)
for node in parseJson(j)["posts"]:
if node{"tim"} != nil:
var
tim = node["tim"].getInt()
ext = node["ext"].getStr()
downFileName = fmt"{downPath}/{tim}{ext}"
echo("Downloading ", node.mediaLink(board, thread), " as ",
downFileName, "...")
var downloadFuture = webClient.downloadFile(node.mediaLink(board,
thread), downFileName)
downloadFuture.callback=
proc() =
echo("Downloading ", tim, ".", ext, " Complete")
waitFor main()
Run
