使用apollo-upload-client时如何在上传文件中设置utf-8编码?

Question

我正在使用apollo-upload-client上传文本文件。当文件到达服务器时，它以7bit编码出现，例如:

const { filename, createReadStream, encoding } = await file;
console.log({ encoding });
--> { encoding: "7bit" }

然后创建如下流:

const stream = createReadStream({ encoding: "utf8" });

，然后使用以下函数为流输出字符串:

function streamToString(stream, cb) {
const chunks = [];
stream.on("data", (chunk) => {
chunks.push(chunk.toString());
});
stream.on("end", () => {
cb(chunks.join(""));
});
}

结果:

streamToString(stream, async (data) => {

console.log({data});
--> good string �� good string ��
}

这是保存在DBgood string �� good string ��中的内容。

我想我需要用适当的编码将文件发送到服务器，也许是utf-8。我该怎么做呢?

Answer 1

streamToString函数实现不正确。下面是正确的版本:

const chunks = [];
readStream.on("data", function (chunk) {
chunks.push(chunk);
});
// Send the buffer or you can put it into a var
readStream.on("end", function () {
res.send(Buffer.concat(chunks));
});