NanoHttpd server cannot stream large videos on android

Question

NanoHttpd server code can be found here.

I'm starting a new Thread in a service that uses NanoHttpd server to stream large videos (about 150mb) but it just pauses right while the loading dialog is shown. I tried increasing and decreasing the buffer reads to no avail. It seems that the server cannot run properly on an Android device.

Same code works fine when I start the server via desktop application. I can stream more than 150mb. When running the server from the phone, I only tried 20mb files and they were good too. However I need to stream much more than that.

Answer 1

In case others come across this and want to see what the actual code is in this solution, I'm posting my code here. I'm using my Android device to stream a video file from the SD card for a Chromecast request. Using this code, I'm able to start the stream in the middle and/or seek to a specific location in the stream.

@Override
@SuppressWarnings("deprecation")
public Response serve(String uri, Method method, Map<String, String> headers, Map<String, String> params, Map<String, String> files) {
    String mimeType = getMimeType();
    String currentUri = getCurrentUri();
    if (currentUri != null && currentUri.equals(uri)) {
        String range = null;
        Log.d(TAG, "Request headers:");
        for (String key : headers.keySet()) {
            Log.d(TAG, "  " + key + ":" + headers.get(key));
            if ("range".equals(key)) {
                range = headers.get(key);
            }
        }
        try {
            if (range == null) {
                return getFullResponse(mimeType);
            } else {
                return getPartialResponse(mimeType, range);
            }
        } catch (IOException e) {
            Log.e(TAG, "Exception serving file: " + filePath, e);
        }
    } else {
        Log.d(TAG, "Not serving request for: " + uri);
    }

    return new Response(Response.Status.NOT_FOUND, mimeType, "File not found");
}

private Response getFullResponse(String mimeType) throws FileNotFoundException {
    cleanupStreams();
    fileInputStream = new FileInputStream(filePath);
    return new Response(Response.Status.OK, mimeType, fileInputStream);
}

private Response getPartialResponse(String mimeType, String rangeHeader) throws IOException {
    File file = new File(filePath);
    String rangeValue = rangeHeader.trim().substring("bytes=".length());
    long fileLength = file.length();
    long start, end;
    if (rangeValue.startsWith("-")) {
        end = fileLength - 1;
        start = fileLength - 1
                - Long.parseLong(rangeValue.substring("-".length()));
    } else {
        String[] range = rangeValue.split("-");
        start = Long.parseLong(range[0]);
        end = range.length > 1 ? Long.parseLong(range[1])
                : fileLength - 1;
    }
    if (end > fileLength - 1) {
        end = fileLength - 1;
    }
    if (start <= end) {
        long contentLength = end - start + 1;
        cleanupStreams();
        fileInputStream = new FileInputStream(file);
        //noinspection ResultOfMethodCallIgnored
        fileInputStream.skip(start);
        Response response = new Response(Response.Status.PARTIAL_CONTENT, mimeType, fileInputStream);
        response.addHeader("Content-Length", contentLength + "");
        response.addHeader("Content-Range", "bytes " + start + "-" + end + "/" + fileLength);
        response.addHeader("Content-Type", mimeType);
        return response;
    } else {
        return new Response(Response.Status.RANGE_NOT_SATISFIABLE, HTML_MIME_TYPE, rangeHeader);
    }
}