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我正在尝试在 Flutter/Dart 中处理 HTTP 请求（在这种情况下，使用 SEARCH 方法过滤 WebDAV 服务器（Nextcloud）上的一些文件）需要在请求正文中发送 XML 数据。

[x] 可以通过 --data 参数在终端上使用 cURL 执行命令：

curl -u user:pass -X SEARCH 'https://host123.com.br/remote.php/dav' -H "content-Type: text/xml" --data '<?xml version="1.0" encoding="UTF-8"?><d:searchrequest xmlns:d="DAV:" xmlns:oc="http://owncloud.org/ns"><d:basicsearch><d:select><d:prop><d:displayname/></d:prop></d:select><d:from><d:scope><d:href>/files/wprech</d:href><d:depth>infinity</d:depth></d:scope></d:from><d:where><d:and><d:or><d:eq><d:prop><d:getcontenttype/></d:prop><d:literal>image/png</d:literal></d:eq><d:eq><d:prop><d:getcontenttype/></d:prop><d:literal>image/jpg</d:literal></d:eq><d:eq><d:prop><d:getcontenttype/></d:prop><d:literal>video/mp4</d:literal></d:eq></d:or></d:and></d:where><d:orderby/></d:basicsearch></d:searchrequest>'

[x] 也可以通过 Postman 应用程序工作：

[ ] 无法使用 Flutter/Dart 对 xml 正文执行此请求。我们使用 DIO pkg 这个项目的所有其他 HTTP 请求，它工作正常，但问题是。用它发送 xml 正文。最接近的代码如下：

void _list() async {
final prefs = await SharedPreferences.getInstance();

var us = prefs.getString('id') ?? '';
var sn = prefs.getString('password') ?? '';

String basicAuth = 'Basic ' + base64Encode(utf8.encode('$us:$sn'));

try {
  Dio dio = new Dio();
  dio.options.method = 'SEARCH';
  dio.options.responseType = ResponseType.plain;
  dio.options.headers = {
    HttpHeaders.authorizationHeader: basicAuth,
    'content-Type': 'text/xml'
  };
  String data =
      '<?xml version="1.0" encoding="UTF-8"?><d:searchrequest xmlns:d="DAV:" xmlns:oc="http://owncloud.org/ns"><d:basicsearch><d:select><d:prop><d:displayname/></d:prop></d:select><d:from><d:scope><d:href>/files/wprech</d:href><d:depth>infinity</d:depth></d:scope></d:from><d:where><d:and><d:or><d:eq><d:prop><d:getcontenttype/></d:prop><d:literal>image/png</d:literal></d:eq><d:eq><d:prop><d:getcontenttype/></d:prop><d:literal>image/jpg</d:literal></d:eq><d:eq><d:prop><d:getcontenttype/></d:prop><d:literal>video/mp4</d:literal></d:eq></d:or></d:and></d:where><d:orderby/></d:basicsearch></d:searchrequest>';

  Response response = await dio.request(
      "https://host123.com.br/remote.php/dav",
      data: data);

  print(response);
} catch (e) {
  print(e);
}}

服务器响应在 400、404、500 和 501 之间变化，具体取决于它的发送方式：

I/flutter ( 6767): DioError [DioErrorType.RESPONSE]: Http status error [400]

有什么帮助吗？:)

4

1 回答 1

4

尝试一个更简单的package:http版本。

import 'dart:convert';
import 'dart:io';

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

main() async {
  var username = 'foo';
  var password = 'B@r!';
  var credential = base64.encode(utf8.encode('$username:$password'));
  var client = http.IOClient();

  var request = http.Request(
    'SEARCH',
    Uri.parse('https://host123.com.br/remote.php/dav'),
  );
  request.headers.addAll({
    HttpHeaders.authorizationHeader: 'Basic $credential',
    'content-type': 'text/xml' // or text/xml;charset=utf-8
  });

  var xml = '<?xml version="1.0" encoding="UTF-8"?>...';
  // either
  request.body = xml;
  // which will encode the string to bytes, and modify the content-type header, adding the encoding
  // or
  // request.bodyBytes = utf8.encode(xml);
  // which gives you complete control over the character encoding

  var streamedResponse = await client.send(request);
  print(streamedResponse.statusCode);

  var responseBody =
      await streamedResponse.stream.transform(utf8.decoder).join();
  print(responseBody);
  client.close();
}
于 2019-10-15T23:37:43.603 回答