def download(self, url, filepath, range_left, range_right, proxy=None):
req = Request()
resp = req.makeRequest(
url,
proxy=proxy,
headers={'Range': 'bytes=%d-%d' % (range_left, range_right)})
chunk_size = 1024 * 256 #256KB
with open(filepath, "wb") as fp:
downloaded = 0 #in KBs
while True:
data = resp.read(chunk_size)
if not data:
print("\nDownload Finished.")
break
fp.write(data)
downloaded += sys.getsizeof(data)
print("\r{0:.2f} MB".format(downloaded / (1024 * 1024)),
end="")
req.closeConnection(resp)
# if servers doesn't exist, use simple download
if client.numPeerServers() == 0:
print("No peer servers! Using default download...")
download_object = DistributedDownloaderAndMerger(url)
download_object.download()
else:
print("Peer Servers found! Distributing download...")
# get the filesize
req = Request()
response = req.makeRequest(url, proxy=peerClientConfig.getProxy())
filesize = int(response.headers['Content-Length'])
req.closeConnection(response)
print("peer-client filesize: {}".format(filesize))
# get the download ranges to be assigned to each
parts = client.numPeerServers()
range_list = Calculation().get_download_ranges_list(
0, filesize - 1, parts)
# connect with each server and send them the download details
client.connectWithPeerServers(range_list, temp_dir)
# wait for download to complete at each server
# except main_thread, calling join() for each thread
# it ensures that merging of parts occur only after each thread has completed downloading
# print ("Threads: ", len(threading.enumerate()))
main_thread = threading.current_thread()
