如何在Flutter中上传图片？

本文介绍了如何在Flutter中上传图片？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想上传图片，我使用http.Client（）进行请求，

I would like to upload a image, I am using http.Client() for making requests,

static uploadImage(String id, File file) { var httpClient = createHttpClient(); Map<String, String> headers = new Map<String, String>(); headers.putIfAbsent("Authorization", () => "---"); headers.putIfAbsent("Content-Type", () => "application/json"); var body=new List(); body.add(id.) httpClient.post(URL_UPLOADIMAGE,headers: headers,body: ,encoding: ) }

请求的主体和编码部分应该是什么？

What should be the body and encoding part for the request ?

推荐答案

使用 MultipartRequest 类

Upload(File imageFile) async { var stream = new http.ByteStream(DelegatingStream.typed(imageFile.openRead())); var length = await imageFile.length(); var uri = Uri.parse(uploadURL); var request = new http.MultipartRequest("POST", uri); var multipartFile = new http.MultipartFile('file', stream, length, filename: basename(imageFile.path)); //contentType: new MediaType('image', 'png')); request.files.add(multipartFile); var response = await request.send(); print(response.statusCode); response.stream.transform(utf8.decoder).listen((value) { print(value); }); }

命名空间：

import 'package:path/path.dart'; import 'package:async/async.dart'; import 'dart:io'; import 'package:http/http.dart' as http;