[JAVASCRIPT] Problem with superagent and multipart/form-data

[triptec]

Description

Generating a javascript client with fileupload doesn't work if consumes is set to multipart/form-data. This seems to be a problem with superagent (forwardemail/superagent#746)

Swagger-codegen version

2.2.1

Swagger declaration file content or url

swagger: '2.0'
info:
  version: '1.0.0'
  title: API
  description: API
  contact:
    name: API
    email: api@api.se
    url: http://api.se
  license:
    name: MIT
    url: http://opensource.org/licenses/MIT
host: localhost
basePath: /
schemes:
  - http
consumes:
  - application/json
produces:
  - application/json
paths:
  /images:
    post:
      description: Create a new image
      operationId: createImage
      consumes:
        - multipart/form-data
      parameters:
        - name: image
          in: formData
          description: The image
          required: true
          type: file
          minLength: 1
          maxLength: 5000000  # ~5MB
      responses:
        '200':
          description: Returns the image information
          schema:
            $ref: '#/definitions/Image'
          headers:
            Location:
              type: string
              description: The URL of the newly-added image
        default:
          description: unexpected error
          schema:
            $ref: '#/definitions/ErrorModel'
      security:
        - api_key: []
definitions:
  Image:
    type: object
    required:
      - id
      - filename
      - mimetype
    properties:
      id:
        type: integer
      filename:
        type: string
      mimetype:
        type: string
  ErrorModel:
    type: object
    required:
      - code
      - message
    properties:
      code:
        type: integer
        format: int32
      message:
        type: string

Suggest a Fix

Changing the code in callApi to something like this solves the problem

    var contentType = this.jsonPreferredMime(contentTypes);

    if (contentType) {
      // Issue with superagent and multipart/form-data (https://github.com/visionmedia/superagent/issues/746)
      if(contentType != 'multipart/form-data'){
        request.type(contentType);
      }
    } else if (!request.header['Content-Type']) {
      request.type('application/json');
    }