我正在创建一个 cloudflare 工作程序，使用 fetch 从我的托管服务器下载文件，但我不断收到此错误。
Promise 类型不正确：Promise 未解析为“Response”。
我已经添加了整个脚本以供参考。我是新手，请大家帮忙！
const homepage = `
<!DOCTYPE html>
<html>
<body>
<button href="/download.aspx">Download</button>
<body>
</html>`;
async function download() {
let url = 'https://club-mavic.xyz/a.pdf';
var options = {
method: 'GET',
redirect: 'follow'
};
let res;
for (let i = 0; i < 3; i++) {
res = await fetch(url, options);
if (res.ok) {
break;
}
sleep(800 * (i + 1));
}
if (res.ok) {
const {
headers
} = res = new Response(res.body, res)
headers.set("Content-Disposition", `attachment; filename=a.pdf`);
headers.set("Content-Length", 1525);
headers.append('Access-Control-Allow-Origin', '*');
headers.set('Content-Disposition', 'inline');
return res;
} else {
const details = await res.text()
return new Response(details, {})
}
}
async function handleRequest(request, event) {
let url = new URL(request.url);
let path = url.pathname;
if (path == '/') {
return new Response(homepage, {
status: 200,
headers: {
"content-type": "text/html;charset=UTF-8",
},
})
} else if (path == '/download.aspx') {
download();
}
}
addEventListener('fetch', event => {
event.respondWith(handleRequest(event.request, event).catch(
(err) => new Response("Report this page when asked at the time of support... ==> " + err.stack, { status: 500 })
)
);
});
要在 Cloudflare Worker 中使用 fetch() 下载文件，您可以使用 Workers 环境提供的 fetch() 函数。这是一个示例代码片段：
javascript
addEventListener('fetch', event => {
event.respondWith(handleRequest(event.request))
})
async function handleRequest(request) {
// Replace 'URL_OF_YOUR_FILE' with the actual URL of the file you want to download
const fileUrl = 'URL_OF_YOUR_FILE';
// Fetch the file
const fileResponse = await fetch(fileUrl);
// Check if the request was successful (status code 200)
if (fileResponse.ok) {
// Extract content type from the original response headers
const contentType = fileResponse.headers.get('content-type');
// Create a new response with the file content and content type
return new Response(fileResponse.body, {
status: fileResponse.status,
statusText: fileResponse.statusText,
headers: {
'Content-Type': contentType,
// You can add other headers if needed
},
});
} else {
// If the request to the file URL was not successful, return an errorresponse
return new Response(`Failed to fetch file: ${fileResponse.statusText}`, {
status: fileResponse.status,
statusText: fileResponse.statusText,
});
}
}
将“URL_OF_YOUR_FILE”替换为您要下载的文件的实际 URL。该脚本将获取文件并返回具有相同内容和内容类型的新响应。
请记住，Cloudflare Workers 在无服务器环境中运行，并且需要考虑一些限制，例如执行时间和内存限制。此外，如果文件非常大，您可能需要流式传输响应，而不是立即将整个文件加载到内存中。