Dart 如何向http post发送多个文件
我想向http post发送两个文件 卷曲看起来像这样Dart 如何向http post发送多个文件,dart,flutter,Dart,Flutter,我想向http post发送两个文件 卷曲看起来像这样 curl -X POST "https://api-us.faceplusplus.com/facepp/v3/compare" \ -F "api_key=<api_key>" \ -F "api_secret=<api_secret>" \ -F "image_file1 =file1" \ -F "image_file1 =file2" 但它返回了这个 NoSuchMethodError:类“String”没
curl -X POST "https://api-us.faceplusplus.com/facepp/v3/compare" \
-F "api_key=<api_key>" \
-F "api_secret=<api_secret>" \
-F "image_file1 =file1" \
-F "image_file1 =file2"
但它返回了这个
NoSuchMethodError:类“String”没有实例获取程序“path”
如何正确发送这些文件?它看起来不像第一个和第二个文件实际上是
文件。当它们确实是文件时,如下面的示例中所示,我得到401(正如预期的那样,因为我有一个伪api密钥)
导入'dart:io';
将“package:http/http.dart”导入为http;
导入“package:path/path.dart”;
班岗{
字符串标题=“”;
字符串描述=“”;
列表文件=[];
Future sendFiles()异步{
试一试{
var uri=uri.parse('https://example.com/api-endpoint');
var request=http.MultipartRequest('POST',uri);
//标题
request.headers.addAll({
“接受”:“应用程序/json”,
“授权”:“持票人$token”,
});
//田地
请求。字段['title']=标题;
请求.字段['description']=说明;
//档案
等待未来(
文件夹,
(文件)异步=>{
request.files.add(
http.MultipartFile(
“文件”,
(http.ByteStream(file.openRead()).cast(),
等待file.length(),
filename:basename(file.path),
),
)
},
);
return wait request.send();
}捕捉(错误){
打印(错误);
返回null;
}
}
}
@jay最好把这当作你自己的问题来问question@MoVod很抱歉,我应该删除它。@RichardHeap非常感谢。请不要只发布代码作为答案,还要解释代码的作用以及它如何解决问题。带有解释的答案通常更有帮助,质量更好,更容易吸引选票
File first;
File second;
var uri = Uri.parse('https://api-us.faceplusplus.com/facepp/v3/compare');
var request = new http.MultipartRequest("POST", uri);
request.fields['api_key'] = apiKey;
request.fields['api_secret'] = apiSecret;
request.files.add(await http.MultipartFile.fromPath('image_file1', first.path, contentType: new MediaType('application', 'x-tar')));
request.files.add(await http.MultipartFile.fromPath('image_file2', second.path, contentType: new MediaType('application', 'x-tar')));
var response = await request.send();
print(response);
main() async {
File first = File('pubspec.yaml');
File second = File('analysis_options.yaml');
Uri uri = Uri.parse('https://api-us.faceplusplus.com/facepp/v3/compare');
http.MultipartRequest request = new http.MultipartRequest('POST', uri);
request.fields['api_key'] = 'apiKey';
request.fields['api_secret'] = 'apiSecret';
request.files.add(await http.MultipartFile.fromPath('image_file1', first.path,
contentType: new MediaType('application', 'x-tar')));
request.files.add(await http.MultipartFile.fromPath(
'image_file2', second.path,
contentType: new MediaType('application', 'x-tar')));
http.StreamedResponse response = await request.send();
print(response.statusCode);
}
import 'dart:io';
import 'package:http/http.dart' as http;
import 'package:path/path.dart';
class Post {
String title = '';
String description = '';
List<File> files = [];
Future<http.StreamedResponse> sendFiles() async {
try {
var uri = Uri.parse('https://example.com/api-endpoint');
var request = http.MultipartRequest('POST', uri);
// Headers
request.headers.addAll({
'Accept': 'application/json',
'Authorization': 'Bearer $token',
});
// Fields
request.fields['title'] = title;
request.fields['description'] = description;
// Files
await Future.forEach(
files,
(file) async => {
request.files.add(
http.MultipartFile(
'files',
(http.ByteStream(file.openRead())).cast(),
await file.length(),
filename: basename(file.path),
),
)
},
);
return await request.send();
} catch (err) {
print(err);
return null;
}
}
}