egg上传文件问题

• Z时代
• 2024-01-10
• 分类：技术分享

 async upload() {
const { ctx } = this;
const stream = await ctx.getFileStream();
const file_name = path.basename(stream.filename);
const upload_path = process.cwd() + '/app/public/files/' + file_name;
const writeStream = fs.createWriteStream(upload_path);
let result;
try {
result = await stream.pipe(writeStream);
} catch (err) {
await sendToWormhole(stream);
throw err;
}
ctx.body = {
url: upload_path,
fields: stream.fields,
};
}

为什么上传小体积文件时候没问题,上传比如几十KB的时候,接收到的图片不能全部展示,比如
这是用来上传的图片,

然后接受完之后变成这样的

回答

async upload() {
    const { ctx } = this;
    const stream = await ctx.getFileStream();
    const file_name = path.basename(stream.filename);
    const upload_path = process.cwd() + '/app/public/files/' + file_name;
    const result = await new Promise((resolve, reject) => {
        const remoteFileStream = fs.createWriteStream(upload_path);
        stream.pipe(remoteFileStream);
        let errFlag;
        remoteFileStream.on('error', err => {
            errFlag = true;
            remoteFileStream.destroy();
            reject(err);
        });
        remoteFileStream.on('finish', async () => {
            if (errFlag) return;
            resolve({ fileName, name: stream.fields.name });
        });
      });
    return result;  
  }

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