制作市值行情列表

# 执行后核对返回 JSON 的业务状态；HTTP 200 仍可能包含业务错误。
curl --silent --show-error --fail-with-body \
  --request GET \
  --url "https://api.coingecko.com/api/v3/coins/markets?vs_currency=usd&order=market_cap_desc&per_page=20&page=1&sparkline=false" \
  --header "x-cg-demo-api-key: ${CG_DEMO_API_KEY}" \
  --header "Accept: application/json"

import json
import os
import re
import urllib.request
import urllib.error

def expand(value):
    return re.sub(r"\$\{([A-Z][A-Z0-9_]*)\}",
                  lambda match: os.environ[match.group(1)], value)

url = expand("https://api.coingecko.com/api/v3/coins/markets?vs_currency=usd&order=market_cap_desc&per_page=20&page=1&sparkline=false")
headers = {
    "x-cg-demo-api-key": expand("${CG_DEMO_API_KEY}"),
    "Accept": expand("application/json"),
}
data = None
request = urllib.request.Request(url, data=data, headers=headers, method="GET")
try:
    with urllib.request.urlopen(request, timeout=30) as response:
        result = json.load(response)
except urllib.error.HTTPError as error:
    print(f"HTTP {error.code}: {error.read().decode('utf-8', errors='replace')}")
    raise SystemExit(1)
print(json.dumps(result, ensure_ascii=False, indent=2))

// Node.js 22+，保存为 request.mjs 后运行 node request.mjs
function expand(value) {
  return value.replace(/\$\{([A-Z][A-Z0-9_]*)\}/g, (_, name) => {
    if (!process.env[name]) throw new Error(`缺少环境变量 ${name}`);
    return process.env[name];
  });
}

const url = expand("https://api.coingecko.com/api/v3/coins/markets?vs_currency=usd&order=market_cap_desc&per_page=20&page=1&sparkline=false");
const headers = Object.fromEntries(
  Object.entries({
  "x-cg-demo-api-key": "${CG_DEMO_API_KEY}",
  "Accept": "application/json"
}).map(([key, value]) => [key, expand(value)])
);
const response = await fetch(url, {
  method: "GET",
  headers,
  signal: AbortSignal.timeout(30000),
});
const text = await response.text();
if (!response.ok) throw new Error(`HTTP ${response.status}: ${text}`);
const result = JSON.parse(text);
console.log(JSON.stringify(result, null, 2));