Question

我是Flutter的新手。我想上传图像和一些详细信息到我的API。我有关于"message": "Undefined variable: extension"的错误。我的图片文件是普通图片文件，不是base64编码的图片。

这是我打开画廊的代码：

_openGallery(BuildContext context) async {
    var picture = await ImagePicker.pickImage(source: ImageSource.gallery);
    this.setState(() {
      imageFile = picture;
      Navigator.of(context).pop();
    });
  }

以下是上传的代码：

Future upload(BuildContext context) async {
    try {
      String url = Uri.encodeFull("https://API_URL");
      http.Response response = await http.post(url,
      body: {
        'photo': imageFile.path,
        'title': titleController.text,
        'description': descriptionController.text,
        }
      );
      print(response.body);
    } catch(e) {
      print(e);
    }
  }

如何解决此错误？

Answer 1

尝试一下

    Map<String, String> headers = { "Authorization": 'token'};
          var request = http.MultipartRequest('POST', Uri.parse(url));
          request.headers.addAll(headers);
          request.files.add(http.MultipartFile.fromBytes('photo', imageFile.readAsBytesSync(), filename: 'photo.jpg'));
          request.fields['title'] = titleController.text;
          request.fields['description'] = descriptionController.text;
      final response = await request.send();
      final respStr = await response.stream.bytesToString();
      print(respStr);

如何在抖动中上传图像

1 个答案: