Node.js 使用multer上传文件时遇到问题

使用multer上传文件，这是我的代码

var multer  = require('multer');
var upload = multer({ dest: 'uploads/' });
app.post("/upload",upload.single('image'), api.uploadFile);

上载图像文件执行多部分请求时出现以下错误

Error: Buffer.write(string, encoding, offset[, length]) is no longer supported
    at Buffer.write (buffer.js:742:11)
    at MultipartParser.initWithBoundary (D:\eclipse-workspace-oxy\ChatServer\node_modules\formidable\lib\multipart_parser.js:61:17)
    at IncomingForm._initMultipart (D:\eclipse-workspace-oxy\ChatServer\node_modules\formidable\lib\incoming_form.js:308:10)
    at IncomingForm._parseContentType (D:\eclipse-workspace-oxy\ChatServer\node_modules\formidable\lib\incoming_form.js:250:12)
    at IncomingForm.writeHeaders (D:\eclipse-workspace-oxy\ChatServer\node_modules\formidable\lib\incoming_form.js:129:8)
    at IncomingForm.parse (D:\eclipse-workspace-oxy\ChatServer\node_modules\formidable\lib\incoming_form.js:97:8)
    at D:\eclipse-workspace-oxy\ChatServer\node_modules\connect\lib\middleware\multipart.js:125:12

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您的堆栈跟踪显示问题来自于可怕，而不是multer

快速搜索Forever的github开放性问题可提供以下信息

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可能尝试运行

npm update

最终得到了解决方案，需要在中间件中添加bodyParser来解析请求体

var bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

它适用于Url编码的请求。对于多部件请求，需要添加中间件，如