删除POST请求中的Transfer-Encoding：chunked？
问题内容：
我正在POST使用以下代码发送请求，但请求以组块（Transfer-Encoding: chunked）的形式发送。我用谷歌搜索了这个问题，它说要包含，Content-Length但是在下面的代码中我不知道如何设置Content- Length：
@RequestMapping(value = "/contacts", method = RequestMethod.POST)
public Map<String, ContactInfo> addContactInfo(
@RequestBody Map<String, ContactInfo> ContactInfoDto) {
ContactInfo contactInfo = ContactInfoDto.get("contact");
if (contactInfo == null) {
throw new IllegalArgumentException("Contact not found.");
}
contactInfo = this.contactInfoManager.addNew(contactInfo);
Map<String, ContactInfo> map = new HashMap<>();
map.put("contact", contactInfo);
return map;
}
问题答案：
您可以用来ResponseEntity显式设置标题。棘手的一点是弄清楚您的内容实际上有多长时间：
@RequestMapping(value = "/contacts", method = RequestMethod.POST)
public ResponseEntity<Map<String, ContactInfo>> addContactInfo(@RequestBody Map<String, ContactInfo> contactInfoDto) throws JsonProcessingException {
ContactInfo contactInfo = contactInfoDto.get("contact");
if (contactInfo == null) {
throw new IllegalArgumentException("Contact not found.");
}
contactInfo = this.contactInfoManager.addNew(contactInfo);
Map<String, ContactInfo> map = new HashMap<>();
map.put("contact", contactInfo);
HttpHeaders headers = new HttpHeaders();
headers.set(HttpHeaders.CONTENT_LENGTH, String.valueOf(new ObjectMapper().writeValueAsString(map).length()));
return new ResponseEntity<Map<String, ContactInfo>>(map, headers, HttpStatus.CREATED);
}
测试：
$ curl -v http://localhost:8080/contacts/ -X POST -d '{ "contact": { "name": "foo" } }' -H 'Content-Type: application/json' && echo
* Trying ::1...
* Connected to localhost (::1) port 8080 (#0)
> POST /contacts/ HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.43.0
> Accept: */*
> Content-Type: application/json
> Content-Length: 32
>
* upload completely sent off: 32 out of 32 bytes
< HTTP/1.1 201 Created
< Server: Apache-Coyote/1.1
< X-Application-Context: application
< Content-Type: application/json;charset=UTF-8
< Content-Length: 26
< Date: Fri, 10 Jun 2016 13:24:23 GMT
<
* Connection #0 to host localhost left intact
{"contact":{"name":"foo"}}
