dart – 如何在Flutter上传图像？

发布时间：2020-12-14 14:51:13 所属栏目：百科来源：网络整理

导读：我想上传一张图片,我正在使用http.Client()来发送请求, static uploadImage(String id,File file) { var httpClient = createHttpClient(); MapString,String headers = new MapString,String(); headers.putIfAbsent("Authorization",() = "---"); headers.

我想上传一张图片,我正在使用http.Client()来发送请求,

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: )
}

请求的正文和编码部分应该是什么？

解决方法

使用 MultipartRequest 级

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);
      });
    }

名称空间：

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

（编辑：李大同）

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