215 lines
7.6 KiB
Python
215 lines
7.6 KiB
Python
# -*- coding: utf-8 -*-
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"""V2EX — public API channel for topics, nodes, users, and replies."""
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import json
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import urllib.request
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from typing import Any
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from .base import Channel
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_UA = "agent-reach/1.0"
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_TIMEOUT = 10
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def _get_json(url: str) -> Any:
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"""Fetch *url* and return parsed JSON. Raises on HTTP/network errors."""
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req = urllib.request.Request(url, headers={"User-Agent": _UA})
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with urllib.request.urlopen(req, timeout=_TIMEOUT) as resp:
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return json.loads(resp.read().decode("utf-8"))
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class V2EXChannel(Channel):
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name = "v2ex"
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description = "V2EX 节点、主题与回复"
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backends = ["V2EX API (public)"]
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tier = 0
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# ------------------------------------------------------------------ #
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# URL routing
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# ------------------------------------------------------------------ #
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def can_handle(self, url: str) -> bool:
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from urllib.parse import urlparse
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d = urlparse(url).netloc.lower()
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return "v2ex.com" in d
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# ------------------------------------------------------------------ #
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# Health check
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# ------------------------------------------------------------------ #
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def check(self, config=None):
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try:
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_get_json(
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"https://www.v2ex.com/api/topics/show.json?node_name=python&page=1"
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)
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self.active_backend = self.backends[0]
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return "ok", "公开 API 可用（热门主题、节点浏览、主题详情、用户信息）"
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except Exception as e:
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self.active_backend = None
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return "warn", f"V2EX API 连接失败（可能需要代理）：{e}"
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# ------------------------------------------------------------------ #
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# Data-fetching methods
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# ------------------------------------------------------------------ #
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def get_hot_topics(self, limit: int = 20) -> list:
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"""获取热门帖子列表。
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Returns a list of dicts with keys:
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title, url, replies, node_name, node_title, content
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"""
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data = _get_json("https://www.v2ex.com/api/topics/hot.json")
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results = []
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for item in data[:limit]:
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node = item.get("node") or {}
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content = item.get("content", "") or ""
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results.append(
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{
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"id": item.get("id", 0),
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"title": item.get("title", ""),
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"url": item.get("url", ""),
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"replies": item.get("replies", 0),
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"node_name": node.get("name", ""),
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"node_title": node.get("title", ""),
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"content": content[:200],
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"created": item.get("created", 0),
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}
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)
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return results
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def get_node_topics(self, node_name: str, limit: int = 20) -> list:
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"""获取指定节点的最新帖子。
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Args:
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node_name: 节点名称，如 "python"、"tech"、"jobs"
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limit: 最多返回条数
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Returns a list of dicts with keys:
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title, url, replies, node_name, node_title, content
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"""
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url = (
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f"https://www.v2ex.com/api/topics/show.json"
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f"?node_name={node_name}&page=1"
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)
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data = _get_json(url)
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results = []
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for item in data[:limit]:
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node = item.get("node") or {}
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content = item.get("content", "") or ""
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results.append(
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{
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"id": item.get("id", 0),
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"title": item.get("title", ""),
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"url": item.get("url", ""),
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"replies": item.get("replies", 0),
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"node_name": node.get("name", node_name),
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"node_title": node.get("title", ""),
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"content": content[:200],
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"created": item.get("created", 0),
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}
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)
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return results
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def get_topic(self, topic_id: int) -> dict:
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"""获取单个帖子详情和回复列表。
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Args:
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topic_id: 帖子 ID（从 URL https://www.v2ex.com/t/<id> 中获取）
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Returns a dict with keys:
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id, title, url, content, replies_count, node_name, node_title,
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author, created, replies (list of dicts with: author, content, created)
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"""
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topic_data = _get_json(
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f"https://www.v2ex.com/api/topics/show.json?id={topic_id}"
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)
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# API returns a list even for single-ID queries
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if isinstance(topic_data, list):
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topic = topic_data[0] if topic_data else {}
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else:
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topic = topic_data
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node = topic.get("node") or {}
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member = topic.get("member") or {}
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# Fetch replies (first page)
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try:
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replies_raw = _get_json(
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f"https://www.v2ex.com/api/replies/show.json"
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f"?topic_id={topic_id}&page=1"
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)
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except Exception:
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replies_raw = []
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replies = [
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{
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"author": (r.get("member") or {}).get("username", ""),
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"content": r.get("content", ""),
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"created": r.get("created", 0),
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}
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for r in (replies_raw or [])
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]
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return {
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"id": topic.get("id", topic_id),
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"title": topic.get("title", ""),
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"url": topic.get("url", f"https://www.v2ex.com/t/{topic_id}"),
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"content": topic.get("content", ""),
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"replies_count": topic.get("replies", 0),
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"node_name": node.get("name", ""),
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"node_title": node.get("title", ""),
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"author": member.get("username", ""),
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"created": topic.get("created", 0),
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"replies": replies,
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}
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def get_user(self, username: str) -> dict:
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"""获取用户信息。
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Args:
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username: V2EX 用户名
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Returns a dict with keys:
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id, username, url, website, twitter, psn, github, btc,
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location, bio, avatar, created
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"""
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data = _get_json(
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f"https://www.v2ex.com/api/members/show.json?username={username}"
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)
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return {
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"id": data.get("id", 0),
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"username": data.get("username", username),
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"url": data.get("url", f"https://www.v2ex.com/member/{username}"),
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"website": data.get("website", ""),
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"twitter": data.get("twitter", ""),
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"psn": data.get("psn", ""),
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"github": data.get("github", ""),
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"btc": data.get("btc", ""),
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"location": data.get("location", ""),
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"bio": data.get("bio", ""),
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"avatar": data.get("avatar_large", data.get("avatar_normal", "")),
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"created": data.get("created", 0),
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}
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def search(self, query: str, limit: int = 10) -> list:
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"""搜索帖子。
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注意：V2EX 公开 API 暂不支持全文搜索端点（/api/search.json 不可用）。
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本方法通过 Jina Reader 代理 V2EX 站内搜索页面获取结果（纯文本，无结构化数据）。
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如需精确搜索，建议直接访问 https://www.v2ex.com/?q=<query> 或
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使用 Exa channel 的 site:v2ex.com 搜索。
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Returns:
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list of dicts with keys: title, url, snippet
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如果搜索不可用，返回包含单条 {"error": str} 的列表。
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"""
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return [
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{
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"error": (
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"V2EX 公开 API 不提供搜索端点。"
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f"建议改用：https://www.v2ex.com/?q={query} "
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"或通过 Exa channel 使用 site:v2ex.com 搜索。"
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)
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}
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]
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