node.js上传文件时如何中断？

Question

我在控制器中有如下代码：

BASE.APP.post('/uploadFile/:request/:file', function(req, res, next) {

  var url = req.usersession.webipAddress;

  var path = 'uploads/' + req.params.file;

  var formData = new BASE.FormData();
  formData.append('fileNameUnique', req.params.file);
  formData.append('file', BASE.FS.createReadStream(path));
  //  console.log(formData);


  formData.submit(url + '/service/uploadFile/', function(err, response) {
    // console.log(response.statusCode);
    res.send(response.statusCode);

  });
});

如果状态=="cancel"我想中断文件上传，是吗可能吗？

Answer 1

如果状态 == "cancel" 试试这个：

req.pause()
res.status = 400;
res.end('Upload cancelled');

Answer 2

我不太了解您的代码的工作方式或您的工作流程。这是一个很可能会起作用的通用解决方案。如果您想要更具体的解决方案，请在问题中添加更多代码。

try {
    if (status === 'cancel') {
        throw new Error("Stopping file upload...");
    }
} catch (e) {
    res.end("the upload was cancelled because of error: " + e.toString());
}

Answer 3

保存从 formData.submit 返回的值并将其用作调用 request.abort 的句柄。

例如

BASE.APP.post('/uploadFile/:request/:file', function(req, res, next) {     

  var formData = new BASE.FormData();
  // ...

  var formSubmitRequest = formData.submit(url + '/service/uploadFile/', function(err, response) {
    res.send(response.statusCode);
  });

  statusChanger.on('status-change', function(status) {
    if (status === "cancel" && formSubmitRequest) {
      formSubmitRequest.abort();
      res.send(524);
    }
  });

}

来自https://github.com/form-data/form-data：

For more advanced request manipulations submit() method returns http.ClientRequest object

来自https://nodejs.org/api/http.html#http_request_abort：

request.abort()#

Added in: v0.3.8

Marks the request as aborting. Calling this will cause remaining data in the response to be dropped and the socket to be destroyed.

node.js上传文件时如何中断？

How to interrupt while uploading the file in node.js?

file

interrupt

form-data

uploading

node.js