我需要使用Spring的RestTemplate调用一个需要POST请求且Content-Type为multipart/form-data的外部API。输入数据只有键值对,没有附件,但服务器强制我使用multipart/form-data。
以下是正常工作的原始请求。
以下是我从RestTemplate的日志中提取和重新排列的原始请求,由于服务器错误地将标头视为值而未能成功。
以下是代码:
以下是正常工作的原始请求。
POST http://the-api:8080 HTTP/1.1
Content-Type: multipart/form-data; boundary=--Eh0oKOHPOSEIJTzFevDxHhPNKhQl7AP6kQL
Accept: */*
Host: the-api:8080
accept-encoding: gzip, deflate
content-length: 680
Connection: keep-alive
--Eh0oKOHPOSEIJTzFevDxHhPNKhQl7AP6kQL
Content-Disposition: form-data; name="param1"
value1
--Eh0oKOHPOSEIJTzFevDxHhPNKhQl7AP6kQL
Content-Disposition: form-data; name="param2"
value2
--Eh0oKOHPOSEIJTzFevDxHhPNKhQl7AP6kQL--
以下是我从RestTemplate的日志中提取和重新排列的原始请求,由于服务器错误地将标头视为值而未能成功。
POST http://the-api:8080 HTTP/1.1
Content-Type: multipart/form-data; boundary=--Eh0oKOHPOSEIJTzFevDxHhPNKhQl7AP6kQL
Accept: */*
Host: the-api:8080
accept-encoding: gzip, deflate
content-length: 680
Connection: keep-alive
--Eh0oKOHPOSEIJTzFevDxHhPNKhQl7AP6kQL
Content-Disposition: form-data; name="param1"
Content-Type: text/plain;charset=UTF-8
Content-Length: 29
value1
--Eh0oKOHPOSEIJTzFevDxHhPNKhQl7AP6kQL
Content-Disposition: form-data; name="param2"
Content-Type: text/plain;charset=UTF-8
Content-Length: 14
value2
--Eh0oKOHPOSEIJTzFevDxHhPNKhQl7AP6kQL--
以下是代码:
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.MULTIPART_FORM_DATA);
MultiValueMap<String, String> params = new LinkedMultiValueMap<>();
params.add("param1", "value1);
params.add("param2", "value2);
HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<>(params, headers);
URI uri = UriComponentsBuilder.fromHttpUrl("http://the-api:8080")
.build().encode(Charset.forName("UTF-8")).toUri();
return restTemplate.postForObject(uri, request, KKPMailResponse.class);
问题
如何防止Spring的RestTemplate为每个参数自动添加头Content-Type: text/plain;charset=UTF-8
和 Content-Length: xx