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  1. 项目清单

我正在尝试通过带有 base64 编码的 HTTP POST 将 JPG 图像（由模拟器中的 ImagePicker 捕获）发送到 AWS REST API。但是 readAsBytesSync() 操作只读取图像的（头部）部分（我已经测试过它以字节的形式打印到字符串中），因此 base64 只能编码那一小部分。可能是什么原因，非常感谢您提前提供的帮助。

  Future<void> captureImage(ImageSource imageSource) async {
    try {
      ImagePicker picker = ImagePicker();
      final pickedFile = await picker.getImage(
          source: ImageSource.camera,
          preferredCameraDevice: CameraDevice.front);
                 String theimagepath = pickedFile.path.toString();
        //_imageFile = imageFile;
       
        print('theimagepath just below');
        print(theimagepath);
         
           String img64 = base64Encode(Io.File(theimagepath).readAsBytesSync());
           //print('bytes'+bytes.toString());
         
           print('img64:   '+img64);
 _imageFile = Io.File(pickedFile.path);


      setState(() {
        print('State here is ');

------------- DEBUG OUTPUT BELOW (base64 encoded string is incomplete) -------------

I/flutter (13629): theimagepath just below
I/flutter (13629): /storage/emulated/0/Android/data/com.example.blabla/files/Pictures/f8a0295e-9ce5-446c-91d2-41c938e49b7f5430316734413263510.jpg
I/flutter (13629): img64:   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
I/flutter (13629): State here is
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1 回答 1

0

这也发生在我这里。

起初我以为它是在前端（颤振），但经过数小时的检查和研究，后端（go lang）接收器的缓冲区读取器在通过 API 调用发送整个 base64 之前将其关闭。

于 2021-04-19T14:13:47.630 回答