按类型读取永久图片素材

cat > request-body.json <<'JSON'
{
  "type": "image",
  "offset": 0,
  "count": 20
}
JSON

# 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 POST \
  --url "https://api.weixin.qq.com/cgi-bin/material/batchget_material?access_token=${WX_ACCESS_TOKEN}" \
  --header "Content-Type: application/json" \
  --data-binary @request-body.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.weixin.qq.com/cgi-bin/material/batchget_material?access_token=${WX_ACCESS_TOKEN}")
headers = {
    "Content-Type": expand("application/json"),
}
body = {
    "type": "image",
    "offset": 0,
    "count": 20,
}
data = json.dumps(body, ensure_ascii=False).encode("utf-8")
request = urllib.request.Request(url, data=data, headers=headers, method="POST")
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))
if isinstance(result, dict) and "errcode" in result and result["errcode"] != 0:
    raise SystemExit("平台返回业务错误，请结合下方排错说明检查响应")

// 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.weixin.qq.com/cgi-bin/material/batchget_material?access_token=${WX_ACCESS_TOKEN}");
const headers = Object.fromEntries(
  Object.entries({
  "Content-Type": "application/json"
}).map(([key, value]) => [key, expand(value)])
);
const body = {
  "type": "image",
  "offset": 0,
  "count": 20
};
const response = await fetch(url, {
  method: "POST",
  headers,
  body: JSON.stringify(body),
  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));
if (Object.hasOwn(result, "errcode") && result["errcode"] !== 0) {
  throw new Error('平台返回业务错误，请结合下方排错说明检查响应');
}