相关疑难解决方法(0)

我收到以下错误快递:

Error: request entity too large
    at module.exports (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/express/node_modules/connect/node_modules/raw-body/index.js:16:15)
    at json (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/express/node_modules/connect/lib/middleware/json.js:60:5)
    at Object.bodyParser [as handle] (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/express/node_modules/connect/lib/middleware/bodyParser.js:53:5)
    at next (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/express/node_modules/connect/lib/proto.js:193:15)
    at Object.cookieParser [as handle] (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/express/node_modules/connect/lib/middleware/cookieParser.js:60:5)
    at next (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/express/node_modules/connect/lib/proto.js:193:15)
    at Object.logger (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/express/node_modules/connect/lib/middleware/logger.js:158:5)
    at next (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/express/node_modules/connect/lib/proto.js:193:15)
    at Object.staticMiddleware [as handle] (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/express/node_modules/connect/lib/middleware/static.js:55:61)
    at next (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/express/node_modules/connect/lib/proto.js:193:15)
TypeError: /Users/michaeljames/Documents/Projects/Proj/mean/app/views/includes/foot.jade:31
    29| script(type="text/javascript", src="/js/socketio/connect.js")
    30| 
  > 31| if (req.host='localhost')
    32|     //Livereload script rendered 
    33|     script(type='text/javascript', src='http://localhost:35729/livereload.js')  
    34| 

Cannot set property 'host' of undefined
    at eval (eval at <anonymous> (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/jade/lib/jade.js:152:8), <anonymous>:273:15)
    at /Users/michaeljames/Documents/Projects/Proj/mean/node_modules/jade/lib/jade.js:153:35
    at Object.exports.render (/Users/michaeljames/Documents/Projects/Proj/mean/node_modules/jade/lib/jade.js:197:10)
    at Object.exports.renderFile …

我想从我的应用程序使用 Node.js 和 Express.js 运行的同一服务器（没有外部云文件存储，也就是本地）实现一个大文件下载（大约 10-1024 Mb）。

我想通了如何将整个文件转换为做到这一点Blob，通过网络传输，然后生成一个下载链接window.URL.createObjectURL(…)的Blob。只要文件很小，这种方法就可以完美地工作，否则不可能将整个文件保存在Blob服务器或客户端的 RAM 中。

我尝试使用File API和AJAX实现其他几种方法，但看起来 Chrome 将整个文件加载到 RAM 中，然后才将其转储到磁盘。同样，对于小文件可能没问题，但对于大文件则不是一种选择。

我的最后一次尝试是发送一个基本的请求Get：

const aTag = document.createElement("a");
aTag.href = `/downloadDocument?fileUUID=${fileName}`;
aTag.download = fileName;
aTag.click();

在服务器端：

应用程序.mjs

app.get("/downloadDocument", async (req, res) => {

    req.headers.range = "bytes=0";

    const [urlPrefix, fileUUID] = req.url.split("/downloadDocument?fileUUID=");

    const downloadResult = await StorageDriver.fileDownload(fileUUID, req, res);

});

存储驱动程序

export const fileDownload = async function fileDownload(fileUUID, req, res) {

    //e.g. C:\Users\User\Projects\POC\assets\wanted_file.pdf
    const …