diff --git a/.gitignore b/.gitignore index 2483976..64a83c7 100644 --- a/.gitignore +++ b/.gitignore @@ -1,2 +1,3 @@ .idea/ __pycache__/ +legacy_server/ diff --git a/config.py b/config.py index 45520a9..cd6945f 100644 --- a/config.py +++ b/config.py @@ -1 +1,2 @@ user_agent = "HNClient (in development)" +debug = True diff --git a/hnapi/README.md b/hnapi/README.md index 9fccecb..c7949df 100644 --- a/hnapi/README.md +++ b/hnapi/README.md @@ -1,3 +1,5 @@ ## Python client to HackerNews API strongly inspired by [haxor](https://github.com/avinassh/haxor) created by Avinash Sajjanshetty (MIT licenced) + +later this was rewritten to be fully asynchronous. diff --git a/hnapi/__init__.py b/hnapi/__init__.py index ffb712e..43e1359 100644 --- a/hnapi/__init__.py +++ b/hnapi/__init__.py @@ -1,74 +1,59 @@ +import asyncio import json -from dataclasses import dataclass -from typing import List +from aiohttp import ClientSession from redis import Redis -from requests import Session API_BASEURL = "https://hacker-news.firebaseio.com/v0/" -@dataclass -class Item: - id: int - type: str - by: str - time: int - url: str - score: int - title: str - # parts: ?? - deleted: bool = None - text: str = None # HTML - dead: bool = None - parent: int = None - poll: int = None - kids: List[int] = None - descendants: int = None - - class HNClient: - def __init__(self, requests_session: Session, redis: Redis): - self.s = requests_session + def __init__(self, session: ClientSession, redis: Redis): + self.s = session self.r = redis - def get_item(self, item_id: int, remove_kids=True): + async def get_item(self, item_id: int, remove_kids=True): key = f"hnclient_item_{item_id}" cache = self.r.get(key) if cache: return json.loads(cache) url = f"{API_BASEURL}item/{item_id}.json" - response = self.s.get(url) - response.raise_for_status() - item = response.json() - self.r.set(key, response.text, ex=60 * 15) + async with self.s.get(url) as response: + response.raise_for_status() + text = await response.text() + item = json.loads(text) + self.r.set(key, text, ex=60 * 15) if "kids" in item and remove_kids: del item["kids"] return item - def get_full_item(self, item_id: int): - item = self.get_item(item_id, remove_kids=False) + async def get_full_item(self, item_id: int): + item = await self.get_item(item_id, remove_kids=False) if "kids" in item: - kids = list(self.get_items_by_id(item["kids"], full=True)) + tasks = [] + for kid in item["kids"]: + task = asyncio.ensure_future(self.get_full_item(kid)) + tasks.append(task) + + kids = await asyncio.gather(*tasks) item["kids"] = kids return item - def get_items_by_id(self, ids: List[int], full=False): - for id in ids: - if full: - yield self.get_full_item(id) - else: - yield self.get_item(id) - - def get_stories(self, page: str, limit=25, offset=0): + async def get_stories(self, page: str, limit=25, offset=0): key = f"hnclient_stories_{page}_{limit}" cached = self.r.get(key) if cached: return json.loads(cached) url = f"{API_BASEURL}{page}.json" - response = self.s.get(url) - response.raise_for_status() - stories = response.json()[offset:limit] - full_stories = list(self.get_items_by_id(stories)) + async with self.s.get(url) as response: + response.raise_for_status() + stories = await response.json() + stories = stories[offset:limit] + tasks = [] + for id in stories: + task = asyncio.ensure_future(self.get_item(id)) + tasks.append(task) + + full_stories = await asyncio.gather(*tasks) self.r.set(key, json.dumps(full_stories), ex=60 * 15) return full_stories diff --git a/poetry.lock b/poetry.lock index a7eee61..b73cf66 100644 --- a/poetry.lock +++ b/poetry.lock @@ -1,3 +1,44 @@ +[[package]] +name = "aiohttp" +version = "3.7.4.post0" +description = "Async http client/server framework (asyncio)" +category = "main" +optional = false +python-versions = ">=3.6" + +[package.dependencies] +async-timeout = ">=3.0,<4.0" +attrs = ">=17.3.0" +chardet = ">=2.0,<5.0" +multidict = ">=4.5,<7.0" +typing-extensions = 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def __init__(self, url: str, requests_session: Session, redis: Redis): - self.url = url - self.s = requests_session - self.r = redis - - def readable_html(self): + async def readable_html(self, url: str): php_file = Path(__file__).parent / "reader.php" - output = subprocess.run(["php", str(php_file)], input=self.url.encode(), capture_output=True) - data = json.loads(output.stdout.decode()) + process = await asyncio.create_subprocess_exec( + "php", str(php_file), + stdin=asyncio.subprocess.PIPE, + stdout=asyncio.subprocess.PIPE) + stdout, stderr = await process.communicate(url.encode()) + data = json.loads(stdout.decode().strip()) del data["headers"] del data["summary"] return json.dumps(data) diff --git a/server.py b/server.py index 10d980f..08e3674 100644 --- a/server.py +++ b/server.py @@ -1,43 +1,54 @@ -import requests -from flask import Flask, jsonify, make_response +import aiohttp from redis import Redis +from starlette.applications import Starlette +from starlette.requests import Request +from starlette.responses import JSONResponse, Response +from starlette.routing import Route -from config import user_agent +from config import debug from hnapi import HNClient from reader import Reader -app = Flask(__name__) +conn = aiohttp.TCPConnector(ttl_dns_cache=60 * 10) +session = aiohttp.ClientSession(connector=conn) r = Redis() -s = requests.session() -s.headers.update({'User-Agent': user_agent}) +reader = Reader() -api = HNClient(s, r) +api = HNClient(session, r) -@app.route("/api/topstories") -def topstories(): - return jsonify(api.get_stories("topstories")) +async def item(request: Request): + item_id = request.path_params["item_id"] + data = await api.get_full_item(item_id) + return JSONResponse(data) -@app.route("/api/item/") -def item(item_id): - return jsonify(api.get_full_item(item_id)) - - -@app.route("/api/read/") -def read(item_id): - item = api.get_item(item_id) +async def read(request: Request): + item_id = request.path_params["item_id"] + item = await api.get_item(item_id) if "url" not in item: return "Url not found", 404 key = f"hnclient_read_{item_id}" cache = r.get(key) if cache: - response = make_response(cache) + response = Response(cache) else: - readable = Reader(item["url"], s, r) - output = readable.readable_html() + output = await reader.readable_html(item["url"]) r.set(key, output, ex=60 * 60 * 24) - response = make_response(output) - response.headers["Content-Type"] = "application/json" + response = Response(output) + response.media_type = "application/json" return response + + +async def topstories(request: Request): + data = await api.get_stories("topstories") + return JSONResponse(data) + + +app = Starlette(debug=debug, routes=[ + Route('/api/item/{item_id:int}', item), + Route('/api/read/{item_id:int}', read), + Route('/api/topstories', topstories), +]) + diff --git a/web/snowpack.config.js b/web/snowpack.config.js index f9fa3eb..1c437c4 100644 --- a/web/snowpack.config.js +++ b/web/snowpack.config.js @@ -1,6 +1,6 @@ const httpProxy = require('http-proxy'); const proxy = httpProxy.createProxyServer({ - target: 'http://localhost:5000', + target: 'http://localhost:8000', timeout: 30 * 1000 });