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make server async

This commit is contained in:
Lukas Winkler 2021-04-09 16:17:53 +02:00
parent 0c4bb83b98
commit f0348bd391
Signed by: lukas
GPG key ID: 54DE4D798D244853
9 changed files with 325 additions and 83 deletions

1
.gitignore vendored
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@ -1,2 +1,3 @@
.idea/
__pycache__/
legacy_server/

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@ -1 +1,2 @@
user_agent = "HNClient (in development)"
debug = True

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@ -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.

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@ -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

247
poetry.lock generated
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@ -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 = ">=3.6.5"
yarl = ">=1.0,<2.0"
[package.extras]
speedups = ["aiodns", "brotlipy", "cchardet"]
[[package]]
name = "async-timeout"
version = "3.0.1"
description = "Timeout context manager for asyncio programs"
category = "main"
optional = false
python-versions = ">=3.5.3"
[[package]]
name = "attrs"
version = "20.3.0"
description = "Classes Without Boilerplate"
category = "main"
optional = false
python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
[package.extras]
dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
docs = ["furo", "sphinx", "zope.interface"]
tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
[[package]]
name = "certifi"
version = "2020.12.5"
@ -41,6 +82,14 @@ dev = ["pytest", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinxco
docs = ["sphinx", "pallets-sphinx-themes", "sphinxcontrib-log-cabinet", "sphinx-issues"]
dotenv = ["python-dotenv"]
[[package]]
name = "h11"
version = "0.12.0"
description = "A pure-Python, bring-your-own-I/O implementation of HTTP/1.1"
category = "main"
optional = false
python-versions = ">=3.6"
[[package]]
name = "hiredis"
version = "2.0.0"
@ -87,6 +136,14 @@ category = "main"
optional = false
python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
[[package]]
name = "multidict"
version = "5.1.0"
description = "multidict implementation"
category = "main"
optional = false
python-versions = ">=3.6"
[[package]]
name = "redis"
version = "3.5.3"
@ -116,6 +173,25 @@ urllib3 = ">=1.21.1,<1.27"
security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
[[package]]
name = "starlette"
version = "0.14.2"
description = "The little ASGI library that shines."
category = "main"
optional = false
python-versions = ">=3.6"
[package.extras]
full = ["aiofiles", "graphene", "itsdangerous", "jinja2", "python-multipart", "pyyaml", "requests"]
[[package]]
name = "typing-extensions"
version = "3.7.4.3"
description = "Backported and Experimental Type Hints for Python 3.5+"
category = "main"
optional = false
python-versions = "*"
[[package]]
name = "urllib3"
version = "1.26.4"
@ -129,6 +205,21 @@ secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "cer
socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
brotli = ["brotlipy (>=0.6.0)"]
[[package]]
name = "uvicorn"
version = "0.13.4"
description = "The lightning-fast ASGI server."
category = "main"
optional = false
python-versions = "*"
[package.dependencies]
click = ">=7.0.0,<8.0.0"
h11 = ">=0.8"
[package.extras]
standard = ["websockets (>=8.0.0,<9.0.0)", "watchgod (>=0.6)", "python-dotenv (>=0.13)", "PyYAML (>=5.1)", "httptools (>=0.1.0,<0.2.0)", "uvloop (>=0.14.0,!=0.15.0,!=0.15.1)", "colorama (>=0.4)"]
[[package]]
name = "werkzeug"
version = "1.0.1"
@ -141,12 +232,71 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
dev = ["pytest", "pytest-timeout", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinx-issues"]
watchdog = ["watchdog"]
[[package]]
name = "yarl"
version = "1.6.3"
description = "Yet another URL library"
category = "main"
optional = false
python-versions = ">=3.6"
[package.dependencies]
idna = ">=2.0"
multidict = ">=4.0"
[metadata]
lock-version = "1.1"
python-versions = "^3.9"
content-hash = "c20d734d8ba300fc5f5d191c7f1091c1bca7e2ae96a4dbf681e8e7ee90d0973f"
content-hash = "7552fbc268d31b1dde9302c281712ca841b6f5c996d2feed94321b47d1a47be3"
[metadata.files]
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]
async-timeout = [
{file = "async-timeout-3.0.1.tar.gz", hash = "sha256:0c3c816a028d47f659d6ff5c745cb2acf1f966da1fe5c19c77a70282b25f4c5f"},
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]
attrs = [
{file = "attrs-20.3.0-py2.py3-none-any.whl", hash = "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6"},
{file = "attrs-20.3.0.tar.gz", hash = "sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700"},
]
certifi = [
{file = "certifi-2020.12.5-py2.py3-none-any.whl", hash = "sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830"},
{file = "certifi-2020.12.5.tar.gz", hash = "sha256:1a4995114262bffbc2413b159f2a1a480c969de6e6eb13ee966d470af86af59c"},
@ -163,6 +313,10 @@ flask = [
{file = "Flask-1.1.2-py2.py3-none-any.whl", hash = "sha256:8a4fdd8936eba2512e9c85df320a37e694c93945b33ef33c89946a340a238557"},
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]
h11 = [
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]
hiredis = [
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@ -272,6 +426,45 @@ markupsafe = [
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]
multidict = [
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]
redis = [
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@ -280,11 +473,63 @@ requests = [
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]
starlette = [
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{file = "starlette-0.14.2.tar.gz", hash = "sha256:7d49f4a27f8742262ef1470608c59ddbc66baf37c148e938c7038e6bc7a998aa"},
]
typing-extensions = [
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urllib3 = [
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]
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]

View file

@ -6,10 +6,11 @@ authors = ["Lukas Winkler <git@lw1.at>"]
[tool.poetry.dependencies]
python = "^3.9"
Flask = "^1.1.2"
requests = "^2.25.1"
redis = "^3.5.3"
hiredis = "^2.0.0"
aiohttp = "^3.7.4"
starlette = "^0.14.2"
uvicorn = "^0.13.4"
[tool.poetry.dev-dependencies]

View file

@ -1,21 +1,17 @@
import asyncio
import json
import subprocess
from pathlib import Path
from redis import Redis
from requests import Session
class Reader:
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)

View file

@ -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/<int:item_id>")
def item(item_id):
return jsonify(api.get_full_item(item_id))
@app.route("/api/read/<int:item_id>")
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),
])

View file

@ -1,6 +1,6 @@
const httpProxy = require('http-proxy');
const proxy = httpProxy.createProxyServer({
target: 'http://localhost:5000',
target: 'http://localhost:8000',
timeout: 30 * 1000
});