BodyParser：意外令牌 -

Question

我实际上正在开发一个带有文件上传和一些数据的 Angular 网络表单。以下是请求标头：

POST /tests/add HTTP/1.1
Host: localhost:3000
Accept: application/json, text/plain, */*
Accept-Encoding: gzip, deflate
Content-Type: application/json;charset=utf-8
Referer: http://localhost:8000/
Content-Length: 2033

我以这种方式构建请求：

var formData = new FormData();
formData.append('file', $scope.test.file);
$http({
  method: 'POST',
  url: backUrl + '/tests/add',
  data: { 'file': $scope.file,
          'token': 'test'},
  contentType: false,
  processData: false,
  transformRequest: function (data, headersGetter) {
      var formData = new FormData();
      angular.forEach(data, function (value, key) {
          formData.append(key, value);
      });
      var headers = headersGetter();
      delete headers['Content-Type'];
      return formData;
  }

但它总是返回一个带有此错误的 400 错误请求：

Unexpected token -
400

SyntaxError: Unexpected token -
    at parse (/home/me/projects/www/node_modules/body-parser/lib/types/json.js:83:15)
    at /home/me/projects/www/node_modules/body-parser/lib/read.js:116:18
    at invokeCallback (/home/me/projects/www/node_modules/raw-body/index.js:262:16)
    at done (/home/me/projects/www/node_modules/raw-body/index.js:251:7)
    at IncomingMessage.onEnd (/home/me/projects/www/node_modules/raw-body/index.js:307:7)
    at emitNone (events.js:86:13)
    at IncomingMessage.emit (events.js:185:7)
    at endReadableNT (_stream_readable.js:974:12)
    at _combinedTickCallback (internal/process/next_tick.js:74:11)
    at process._tickCallback (internal/process/next_tick.js:98:9)

这是我在后端唯一对 bodyParser 的引用：

app.use(bodyParser.json());       // to support JSON-encoded bodies
app.use(bodyParser.urlencoded({     // to support URL-encoded bodies
  extended: true,
  defer: true
}));

我究竟做错了什么 ？

Answer 1

您确定要发送 JSON 吗？

很可能您使用的是无效的 JSON，这会导致 bodyParser.json() 出现错误。

确保您使用的是有效的 JSON。您还可以将 bodyParser.json 与 bodyParser.raw 交换为中间件。