我正在使用船帆0.10.5,它使用船长上传文件。现在我有一个用户可以上传文件的表单。但是,文件上载不是必需的。在后端,我需要检查文件是否已上传。
我的代码是这样的:
if(req.file('img')){
req.file('img').upload({
maxBytes: 10000000
}, function (err, uploadedFiles){
if(err){
return res.json(500, err);
}
else if(uploadedFiles.length === 0){
return res.json(500, {"error": "no file uploaded"});
}
else{
// do something with image
}
});
}
else {
// proceed without image
}
我没有上传图片时收到以下错误:
Error: EMAXBUFFER: An Upstream (`NOOP_img`) timed out before it was plugged into a receiver. It was still unused after waiting 4500ms. You can configure this timeout by changing the `maxTimeToBuffer` option.
at null.<anonymous> (/home/mandeep/projects/thirstt/node_modules/sails/node_modules/skipper/standalone/Upstream/Upstream.js:86:15)
at Timer.listOnTimeout [as ontimeout] (timers.js:112:15)
第一个if条件总是被评估为true。如何检查用户是否未上传任何文件?
答案 0 :(得分:5)
将我的代码更改为
req.file('img').upload({
maxBytes: 10000000
}, function (err, uploadedFiles){
if(err){
return res.json(500, err);
}
else if(uploadedFiles.length === 0){
// proceed without files
}
else{
// handle uploaded file
}
});
现在工作正常