server_flask.py

#!/usr/bin/env python3
from gevent import pywsgi
from flask import Flask, request, Response
from random import randint, choice
from urllib.request import quote, unquote
from time import time
from hashlib import md5
from glob import glob
import sys, os, json
from pybase16384 import encode_to_string
from img import save_img

host = ('0.0.0.0', 80)
app = Flask(__name__)
MAXBUFFSZ = 16*1024*1024

def get_uuid() -> str:
	return encode_to_string(md5(str(time()).encode()).digest())[:2]

def get_arg(key: str) -> str:
	return request.args.get(key)

@app.route("/", methods=['GET'])
@app.route("/index.html", methods=['GET'])
def index() -> bytes:
	with open("./index_quart.html") as f:
		r = f.read()
	return r

@app.route("/signup", methods=['GET'])
def signup() -> dict:
	try:
		diff = int(time()) - (int(get_arg("key")) ^ pwd)
		if diff < 10 and diff >= 0:		#验证通过
			new_uuid = get_uuid()
			os.makedirs(user_dir + new_uuid)
			return {"stat":"success", "id":quote(new_uuid)}
		else: return {"stat":"wrong", "id":"null"}
	except: return {"stat":"error", "id":"null"}

@app.route("/vote", methods=['GET'])
def vote() -> dict:
	try:
		cli_uuid = unquote(get_arg("uuid"))
		if len(cli_uuid) == 2:			#base14检测
			cli_img = unquote(get_arg("img"))
			if len(cli_img) == 5:		#base14检测
				cli_cls = get_arg("class")
				print("uuid:", cli_uuid, "img:", cli_img, "class:", cli_cls)
				cli_dir = user_dir + cli_uuid + '/'
				#os.makedirs(cli_dir, exist_ok=True)
				with open(cli_dir + cli_img, "w") as f: f.write(cli_cls)
				return {"stat":"success"}
			else: return {"stat":"invimg"}
		else: return {"stat":"invid"}
	except: return {"stat":"noid"}

def do_pick(user_uuid: str, send_name_only: bool):
	if len(user_uuid) == 2:		#base14检测
		user_path = user_dir + user_uuid +'/'
		#print("User dir:", user_path)
		if os.path.exists(user_path):
			voted_imgs_list = os.listdir(user_path)
			all_imgs_list = [name[-10:-5] for name in glob(image_dir + "*.webp")]
			all_imgs_len = len(all_imgs_list)
			if len(voted_imgs_list) < all_imgs_len:
				if len(voted_imgs_list) <= all_imgs_len*8//10:
					pick_img_name = all_imgs_list[randint(0, all_imgs_len-1)]
					while pick_img_name in voted_imgs_list:
						pick_img_name = all_imgs_list[randint(0, all_imgs_len-1)]
				else:
					pick_img_name = choice(list(
						set(all_imgs_list).difference(set(voted_imgs_list))))
				if send_name_only:
					if os.path.exists(info_json_path):
						if os.path.getsize(info_json_path) == 0:
							os.remove(info_json_path)
						try:
							with open(info_json_path, "r") as f:
								info_json = json.load(f)
							if pick_img_name in info_json.keys():
								uploader = info_json[pick_img_name]
							else: uploader = "涩酱"
						except: uploader = "涩酱"
					else: uploader = "涩酱"
					return {"stat":"success", "img":quote(pick_img_name), "uploader":quote(uploader)}
				else:
					img_path = image_dir + pick_img_name + ".webp"
					try:
						with open(img_path, "rb") as f:
							return Response(f.read(), content_type="image/webp")
					except: return {"stat":"readimgerr"}
			else: return {"stat":"nomoreimg"}
		else: return {"stat":"noid"}
	else: return {"stat":"invid"}

@app.route("/pickdl", methods=['GET'])
def pickdl():
	return do_pick(unquote(get_arg("uuid")), False)

@app.route("/pick", methods=['GET'])
def pick():
	return do_pick(unquote(get_arg("uuid")), True)

@app.route("/img", methods=['GET'])
def img():
	target_img_name = unquote(get_arg("path"))
	if len(target_img_name) == 5:		#base14检测
		img_path = image_dir + target_img_name + ".webp"
		#print("Get img:", img_path)
		if os.path.exists(img_path):
			try:
				with open(img_path, "rb") as f:
					return Response(f.read(), content_type="image/webp")
			except: return {"stat":"readimgerr"}
		else: return {"stat":"nosuchimg"}
	else: return {"stat":"invimg"}

@app.route("/upload", methods=['POST'])
def upload() -> dict:
	cli_uuid = unquote(get_arg("uuid"))
	print("post from:", cli_uuid)
	if len(cli_uuid) == 2:
		if os.path.exists(user_dir + cli_uuid):
			length = int(request.headers.get('content-length'))
			print("准备接收:", length, "bytes")
			if length < MAXBUFFSZ:
				return save_img(request.get_data(), cli_uuid, image_dir, info_json_path)
			else:
				return save_img(request.stream.read(length), cli_uuid, image_dir, info_json_path)
		else: return {"stat":"noid"}
	else: return {"stat":"invid"}

@app.route("/upform", methods=['POST'])
def upform() -> dict:
	cli_uuid = unquote(get_arg("uuid"))
	print("post from:", cli_uuid)
	if len(cli_uuid) == 2:
		if os.path.exists(user_dir + cli_uuid):
			re = []
			for f in request.files.getlist("img"):
				re.append({"name":f.filename, **save_img(f.read(), cli_uuid, image_dir, info_json_path)})
			return {"result": re}
		else: return {"stat":"noid"}
	else: return {"stat":"invid"}

@app.before_first_request
def setuid() -> None:
	if server_uid > 0:		#监听后降权
		os.setuid(server_uid)

if __name__ == '__main__':
	if len(sys.argv) == 4 or len(sys.argv) == 5:
		user_dir = sys.argv[1]
		image_dir = sys.argv[2]
		pwd_file = sys.argv[3]
		server_uid = int(sys.argv[4]) if len(sys.argv) == 5 else -1
		with open(pwd_file, "rb") as f:
			pwd = int.from_bytes(f.read()[2:], byteorder="big")		#两个汉字，四个字节
		if user_dir[-1] != '/': user_dir += '/'
		if os.path.exists(image_dir):
			if image_dir[-1] != '/': image_dir += '/'
			info_json_path = image_dir + "info.json"
			print("Starting ICQS at: %s:%s" % host, "storage dir:", user_dir, "image dir:", image_dir)
			pywsgi.WSGIServer(host, app).serve_forever()
		else: print("Error: image dir", image_dir, "is not exist.")
	else: print("Usage: <user_dir> <image_dir> <pwd_path> (server_uid)")