Flutter DIO:使用带Dio包的二进制文件上传图像 [英] Flutter DIO: upload image using binary body with Dio package

问题描述

通过http包，我可以通过将二进制数据放在post调用的正文中(例如此代码的片段中)来将图像发送到服务器:

With thwe http package I can send an image to a server by putting te binary data in the body of a post call like in the snippet of this code:

var response = await http.post('My_url', body: File(path).readAsBytesSync(),  headers: {
                    'apikey': 'myAPIKEY',
                    'Content-Type': 'image/*', // set content-length
                  });

我不能通过使用Dio来做同样的事情，我不知道如何将二进制数据直接放入体内(就像我可以用邮递员一样)

I can't do the same thing by using Dio, I don't know how to put directly the binary data in the body (like i can do it with postman)

推荐答案

如果有人偶然发现同一问题，只需提出我的解决方案.

Just putting my solution if someone stumbles upon the same issue.

我必须在已签名的Google存储URL上上传文件.将文件二进制数据插入PUT请求主体所需的API.无法使用DIO插件实现，我使用DART HTTP包解决了该问题，下面是示例代码.

I had to upload the file at a signed google storage URL. API required to insert the file binary data in the body of the PUT request. Couldn't implement using the DIO plugin, I resolved the issue using the DART HTTP package, Below is a sample code.

import 'package:http/http.dart' as http;

await http.put(
  Uri.parse(uploadURL),
  headers: {
    'Content-Type': mimeType,
    'Accept': "*/*",
    'Content-Length': File(filePath).lengthSync().toString(),
    'Connection': 'keep-alive',
  },
  body: File(filePath).readAsBytesSync(),
);

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