CODEWITHSUNDEEP
springspring-boothttpresttemplate
Tamim Addari
Tamim Addari

Reputation: 7841

How to remove charset from Spring RestTemplate?

When I am posting form request, spring is adding charset like application/x-www-form-urlencoded; charset=UTF-8 which causing problem to consume restful service. How can I remove the charset from RestTemplate to so the content-type is exactly application/x-www-form-urlencoded?

Upvotes: 3

Views: 2425

Answers (2)

sge
sge

Reputation: 738

I had the same problem. I solved it by removing the charset from the contenttype in the header after it was added.

class MyFormHttpMessageConverter extends FormHttpMessageConverter {


  @Override
  public void write(final MultiValueMap<String, ?> map, final MediaType contentType, final HttpOutputMessage outputMessage) throws IOException,
                                                                                                                                   HttpMessageNotWritableException {
    super.write(map, contentType, outputMessage);

    HttpHeaders headers = outputMessage.getHeaders();
    MediaType mediaType = headers.getContentType();
    if(Objects.nonNull(mediaType) && MapUtils.isNotEmpty(mediaType.getParameters())){
      Map<String, String> filteredParams =  mediaType.getParameters()
                                                     .entrySet()
                                                     .stream()
                                                     .filter(entry -> !entry.getKey().equals("charset"))
                                                     .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
      headers.setContentType(new MediaType(mediaType, filteredParams));
    }
  }
}

Upvotes: 2

Lesiak
Lesiak

Reputation: 26094

FormHttpMessageConverter makes a lot of validations to make sure you are using a MediaType with a valid charset. I would try either subclassing it and registering a new converter (there are a lot of private methods though), or converting your MultiValueMap to String payload manually (StringHttpMessageConverter is a lot less restrictive about Media Types)

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
HttpEntity<String> entity = new HttpEntity<>("param1=value1", headers);
String result = restTemplate.postForObject( url, entity, String.class);

Upvotes: 4

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