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()