import os
import sys
import random
import time
import urllib.request

from lxml import html


targetDir=""
links=sys.argv
for link in links:
	time.sleep(1+random.random())
	with urllib.request.urlopen(link) as req:
		if req.getcode()!=200:
			print("error when downloading {0}".format(link),file=sys.stderr)
			continue
		doc_str=req.read().decode("utf8")

	doc=html.fromstring(doc_str)

	license=doc.xpath("//div[@class='photo-license-info']//span/text()")[0].strip()
	imgUrl=doc.xpath("//meta[@property='og:image']/@content")[0]
	filename=imgUrl.split("/")[-1]

	with urllib.request.urlopen(imgUrl) as req:
		if req.getcode()!=200:
			print("error when downloading {0}".format(link),file=sys.stderr)
			continue
		with open(os.path.join(targetDir,filename),mode="wb") as f:
			f.write(req.read())

	print("\t".join(map(str, [link,filename,license])))