I'm writing an chrome application with scala.js, and have some file reading problem.
When I use chrome.fileSystem.chooseEntry with openDirectory to select a directory, I want to read the _meta_.json file inside, the code is:
chrome.fileSystem.chooseEntry(js.Dynamic.literal("type" -> "openDirectory"), (dir: Entry) => { dir.getFile("_meta_.json", js.Dynamic.literal(), (entry: FileEntry) => { entry.file((file: FileEntry) => { val reader = new FileReader() reader.onload = (event: UIEvent) => { println("############ read file: "+ event) } reader.onloadend = (event: ProgressEvent) => { println("############ read file: "+ reader.result) () } reader.onerror = (event: Event) => { println("######### read error") () } println("###### going to read") reader.readAsText(entry.asInstanceOf[Blob]) // !!!! () }) })})(The code here is simplified, if you want to see the accurate code, please refer to https://github.com/freewind/fast-links/blob/master/src/main/scala/in/freewind/fastlinks/chrome_app/config/Header.scala#L45)
But when the code is running, it doesn't print anything, seems the file is never read. Then I set a debugger and stepped into the line ends with // !!!!, and run the code in console:
reader.readAsText(this.entry$1$2)It reports error:
TypeError: Failed to execute 'readAsText' on 'FileReader': parameter 1 is not of type 'Blob'.It clearly shows the reason, but I don't know how to fix it. I searched but all the similar examples are using the file input file from html DOM.
How to read the file correctly?
