opencode zen free 模型，三方 api 调用报错问题初步解决方案

今天早上准备继续快乐白嫖的时候突然报错：

HTTP 403

{"type":"error","error":{"type":"FreeTierError","message":"Error from provider (Console): OpenCode's free tier can only be used from within OpenCode"}}

抓包简单折腾下发现：现在必须完整的 header ，其中 x-opencode-request, x-opencode-session 是 opencode cli 本地算出来的，乱填是不可以的

headers:

  User-Agent: opencode/1.18.31 ai-sdk/provider-utils/4.0.40 runtime/bun/1.3.14

  x-opencode-client: cli

  x-opencode-project: global

  x-opencode-request: msg_0ada1b968001cxm5rgh28JxlDH

  x-opencode-session: ses_f525e4699ffe5hmrr6t1FiPVca

介于有部分佬友生成的 x-opencode-request, x-opencode-session 有问题，这里给出 opencode 源码生成机制的 js 的脚本，可以 nodejs 或者复制到浏览器控制台执行

function gen(desc) {

  let last = 0, ctr = 0;

  const chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

  const ts = Date.now();

  ctr = (ts !== last) ? 1 : ctr + 1; last = ts;

  let v = BigInt(ts) * 0x1000n + BigInt(ctr);

  if (desc) v = ~v;

  let time = "";

  for (let i = 0; i < 6; i++) time += Number((v >> BigInt(40 - 8 * i)) & 0xffn).toString(16).padStart(2, "0");

  const rnd = [...crypto.getRandomValues(new Uint8Array(14))].map(b => chars[b % 62]).join("");

  return time + rnd;

}

function getKey() {

  const ses = "ses_" + gen(true), msg = "msg_" + gen(false);

  console.log("ses:", ses);

  console.log("msg:", msg);

}

getKey()