Spring WebClient's Uri Builder is not encoding "+" in query parameter.

I am using below code snippet to re-produce this issue.

final MultiValueMap<String, String> queryParams = new LinkedMultiValueMap<>();
String value= "2+3 4";
String key = "val";
queryParams.add(key, value);
ResponseSpec response = agent.get(headers->{}, queryParams, "/data/read");
String responseBody = respnose.bodyToMono(String.class).block(); 

The service call to producer application is happening successfully but it returns 404-Not Found since the query parameter is not encoded completely.

Encoded final url: /data/read?val=2+3%204

Expected encoded URL: /data/read?val=2%2B3%204

Here "+" is not encoded. Appreciate any suggestion here.

Thanks, Vikram.N

Comment From: rstoyanchev

I've edited your comment to improve the formatting. You might want to check out this Mastering Markdown guide for future reference.

Comment From: rstoyanchev

There is no way to know what serviceCaller.callGet does exactly. Most likely the query param value needs to be expanded as a URI variable to apply the stricter encoding. Please review https://docs.spring.io/spring/docs/current/spring-framework-reference/web-reactive.html#web-uri-encoding.

Comment From: spring-projects-issues

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Comment From: VikramAdh

Found the answers by similar issues. So closing this issue. Thank you for responses.

Comment From: diegocastro

Please post the answer so others with a similar problem can benefit from this issue.

Comment From: cah-bindiyasameem

Our team solved this issue with the help of this stack-overflow webClient.get() .uri { uriBuilder -> val queryParams = mapOf( "phone-number" to "+33612345678", "mobile-number" to "+61432111222" ) uriBuilder.path("/endpoint") .apply { queryParams.keys.forEach { key -> queryParam(key, "{$key}") } } .build(queryParams) }