进一步有进一步惊喜

def addDownloadTask(url,dir,out):
    postdata = {
        "jsonrpc": "2.0",
        "id": "QXJpYU5nXzE1NDgzODg5MzhfMC4xMTYyODI2OTExMzMxMzczOA=="
    }
    rpc_request = postdata
    rpc_request["method"] = "aria2.addUri"
    # rpc 的选项，去掉--就可以了
    options = {
        "dir":dir,
        "out":out,
        "allow-overwrite":"true"
    }
    rpc_request["params"] = [[url],options]
    response = requests.post(url=rpc_url, json=rpc_request)
    if response.status_code == 200:
        result = response.json().get("result", [])
        print("gid: {}".format(result))
        return result
    else:
        log("无法调用aria2")

def download_status(gid):
    postdata = {
        "jsonrpc": "2.0",
        "id": "QXJpYU5nXzE1NDgzODg5MzhfMC4xMTYyODI2OTExMzMxMzczOA=="
    }
    rpc_request = postdata
    rpc_request["method"] = "aria2.tellStatus"
    rpc_request["params"] = [gid]
    response = requests.post(url=rpc_url,json=rpc_request)
    if response.status_code == 200:
        result = response.json().get("result","")
        if result != "":
            status = result.get("status")
            if status != "":
                return status
    return None

def download(url,dir,out):
    log("开始下载:{}".format(url))
    gid = addDownloadTask(url,dir,out)
    status = download_status(gid)
    error = False
    while True and not error:
        if status == "active":
            time.sleep(3)
            print("下载中.....\n")
            status = download_status(gid)
        if status == "complete":
            break
        elif status == "waiting":
            log("下载队列已满")
            time.sleep(4)
        elif status == "paused":
            log("暂停下载")
            break
        elif status == "error":
            log("下载错误")
            error = True
            break
        elif status == "removed":
            log("已经从下载队列中移除")
            break
    if error:
        log("下载:{}出错".format(url))
        return -1
    else:
        log("下载{}成功".format(url))
        return 0

day = datetime.datetime.now().strftime('%Y%m%d')
log_file = day+"_log.txt"
def log(value,print_flag = True):
    logfile = open(log_file, 'a', encoding='utf-8')
    if logfile.writable():
        now_data = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
        log_message = "时间:{} : log : {}\n".format(now_data, value)
        if print_flag:
            print(log_message)
        logfile.write(log_message)
    try:
        logfile.close()
    except IOError:
        print("写入日志错误")
    else:
        return