CODEWITHSUNDEEP
javaspringresttemplate
Roddy of the Frozen Peas
Roddy of the Frozen Peas

Reputation: 15219

Force Spring RestTemplate to ignore response's content type headers

I'm trying to make a GET request to a server that I don't control, and which is returning an invalid value in the Content-Type header: "Application/json; charset=".

When I try to do a GET call, Spring throws a InvalidMimeTypeException when trying to parse this value because it rightly expects that there should be an actual charset following that = sign.

restTemplate.getForObject(new URI(DATASOURCE), String.class); // throws InvalidMimeTypeException when attempting to parse response

Is it possible to configure RestTemplate to ignore whatever content-type headers are returned by in the response? I have no control over the server I'm querying. (Spring-Boot 2.2.0.RELEASE.)

org.springframework.http.InvalidMediaTypeException: Invalid mime type "Application/json; charset=": 'value' must not be empty
    at org.springframework.http.MediaType.parseMediaType(MediaType.java:574) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
    at org.springframework.http.HttpHeaders.getContentType(HttpHeaders.java:966) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
    at org.springframework.web.client.HttpMessageConverterExtractor.getContentType(HttpMessageConverterExtractor.java:135) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:92) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:744) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:717) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]
    at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:336) ~[spring-web-5.2.0.RELEASE.jar:5.2.0.RELEASE]

Upvotes: 2

Views: 3947

Answers (2)

Emre
Emre

Reputation: 1

Sorry for answer latency, I'm answering so when one searches a solution for related problem, it could be a reference.

In addition to converter answer, you should extend a ResponseExtractor with HttpMessageConverter and override getContentType there, because RestTemplate execute method firstly checks content type of response and if it cannot be parsed, then also throws exception there. So both Converter and Extractor should exist.

Upvotes: 0

earandap
earandap

Reputation: 1496

You implement a custom HttpMessageConverter. Here an example. I guess that you can reuse the JSON converter and register the custom content type.

Upvotes: 1

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