如何从 flutter 将图像 base64 发送到 django 服务器

Question

有人可以帮我解决这个问题吗？我正在将图像从 flutter 发送到 django (python) 服务器。我成功地从手机拍摄了图像 camera/gallery 并将图像转换（编码）为 base64。

扑码：

 Future classifyImage() async{
if(imageFile==null) return;
  String base64Image = base64Encode(imageFile.readAsBytesSync());
String fileName = imageFile.path.split("/").last;
http.post(phpEndPoint, body:
{
  "image" : base64Image,
  //"name" : fileName,
}).then((res) {
  print(res.body);
}).catchError((err) {
  print(err);
//print(base64Image);
//print(fileName);
});
}

here is the converted string in flutter by base64

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

现在的问题是django服务器接收到的字符串与flutter中转换的字符串不同。

here is the string which is received in django server

Python代码：

@csrf_exempt
def android_predict(request):
try : 
    print('Request method is : ' + request.method)
    if request.method == 'POST' :
        print('method is POST')
        print('Body is : ' + str(request.body))
        decoded = request.body.decode("UTF-8")
        print(decoded)
        name_image = decoded.split('&')[1].split('=')[1]
        print('name is : ' + name_image)
        b64_image = decoded.split('&')[0].split('=')[1]
        print('Base64 image is : ' + b64_image)
        missing_padding = len(b64_image)%4
        print('Length is : ' + str(len(b64_image)))
        if missing_padding : 
            b64_image += '='*(4-missing_padding)
        print('Modified Base64 image is : ' + b64_image)
        print('New length is : ' + str(len(b64_image)))
        image = PIL.Image.open(io.BytesIO(base64.b64decode(b64_image)))
        target_image = image.resize((500,500),PIL.Image.ANTIALIAS)
        print(type(target_image))
        image_array = np.array(target_image)
        image_file, x1 = predict_image(image_array,name_image)
        # image = PIL.Image.open(io.BytesIO(b64_image))
        context_dict = {'statusCode' : 0, 'statusMessage' : 'working', 'prediction' : x1}
    else :
        print('method is GET')
        context_dict = {'statusCode' : 1, 'statusMessage' : 'request type is not post'}
    print(context_dict)
    return JsonResponse(context_dict, safe=False)
except : 
    context_dict = {'statusCode' : 1, 'statusMessage' : 'exception occurred'}
    print(context_dict)
    return JsonResponse(context_dict, safe=False)

Answer 1

发送base64字符串到服务器时，转换成urlencode

var encoded = Uri.encodeFull(base64String);

并在服务器中将您的字符串值转换为

urldecording -> base64decording

如何从 flutter 将图像 base64 发送到 django 服务器

how to send image base64 to django server from flutter

python

django

python-requests

flutter

flutter-dependencies