Remove Transfer-Encoding:chunked in the POST request?

Question

I am sending a POST request using the following code but the request is send in the form of chunked (Transfer-Encoding: chunked). I googled about the problem and it says to include the Content-Length but in the below code I could not figure out how could I set the 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;

}

I believe it's the **Response**, not request, which is being transferred in a chunk oriented way — Ali Dehghani, Jun 10 '16 at 11:58
@RamDuttShukla Is it the request or response you want to set the `Content-Length` on it? — Ali Dehghani, Jun 10 '16 at 12:16

score 12 · Accepted Answer · answered Jun 10 '16 at 13:28

You can use ResponseEntity to set headers explicitly. The tricky bit is figuring out how long your content actually is:

@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);
}

Test:

$ 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"}}

score 5 · Answer 2 · edited Mar 24 '17 at 08:57

The following code:

@RequestMapping(value = "/contacts", method = RequestMethod.POST)
public Map<String, ContactInfo> addContactInfo(
                                @RequestBody Map<String, ContactInfo> ContactInfoDto,    
                                @RequestHeader(value = HttpHeaders.CONTENT_LENGTH, required = true) Long contentLength
) { ... }

Can be used to require Content-Length header to be sent. Just note that you also have to add that header in code that sends request (most of the clients do that automatically but better check)

Remove Transfer-Encoding:chunked in the POST request?

2 Answers2

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