WebClient makes it possible to perform reactive non-blocking HTTP requests in Spring applications. Use this tag for any questions involving its usage.
Questions tagged [spring-webclient]
992 questions
3
votes
2 answers
Spring Webclient : illegalargumentexception not enough variables to expand 'comment_count'
I am using spring webclient to make a Facebook graph api request with url containing {comment_count}
But, getting this exception
java.lang.IllegalArgumentException: Not enough variable values available to expand reactive spring
Code Snippet :…
kaushik
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3
votes
1 answer
Webflux Webclient logs "Failed to release a message" when HttpStatus::is4xxClientError occurs
I'm trying to download a zip file from server using Webflux WebClient. What is the correct way to handle errors?
When file exists on server, everything is OK. Otherwise, I got a warning from Netty that it couldn't release a message.
return…
Sergei Nikolaev
- 33
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3
votes
0 answers
How to global error filter on Spring WebClient?
I want to add a global error filter to my WebClient, so that any exceptions and responses that are not 200 OK result in an exception.
Problem: the following already works, but in case the url host connection is down completely…
membersound
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3
votes
1 answer
WebFlux WebClient loading entire file into direct buffer memory during multipart upload
I'm building an app with Spring Boot 2.1.6.RELEASE & Webflux
We have an endpoint that we can upload files using multipart and are using WebClient for our uploads.
Our upload client code looks like this
@Component
class UploadClient(
private val…
Matthew Wilson
- 2,045
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3
votes
3 answers
How to override any HttpHeader in response of WebClient?
WebClient.builder().baseUrl("/").filter(contentTypeInterceptor()).build();
How can I modify the Content-Type of the received response (because I'm receiving a response from a webserver that emits the wrong content type. As I'm not in control of the…
membersound
- 81,582
- 193
- 585
- 1,120
3
votes
1 answer
What's the correct way to get the response body from a WebClient in an error case?
I'm new to WebClient and reactive programming. I want to get the response body from a request. In case of an error the http-code, headers and body must be logged, but the body should still be returned.
After lots of digging and googling I found two…
BetaRide
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3
votes
3 answers
How to make multiple Spring Webclient calls in parallel and wait for the result?
I am new to Reactive programming and I would like to make two API calls in parallel and process the results and return a simple array or list of items.
I have two functions, one returns a Flux and the other returns a Mono and I make a very simple…
Ahmed H. Saab
- 395
- 3
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2
votes
1 answer
Send a huge json as a stream using Spring WebClient
I am new to Spring WebFlux and WebClient. I am working on a PoC where I have to send a huge JSON (> 100 MB) as a stream from microservice A to B using a POST request. The current implementation sends the entire json as the request body which leads…
Ronit Nath
- 41
- 5
2
votes
1 answer
Adding Dynamic Headers in @HttpExchange
I'm exploring Spring Boot 3. I created 2 REST services where one communicates with the other. Both are using Spring-starter-web and also imported Webflux. I found we can use @HttpExchange (My previous experience is Spring Boot 2.6 and also used only…
Coder
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2
votes
1 answer
Spring security - using WebClient access a resource that is protected via Oauth2 "Password" grant type
How can I access with WebClient a resource that is protected via the Oauth2 'Password' grant type?
Connecting with Oauth2 'client-credentials' works. In this case I need the password grant type.
I get this error:
401 Unauthorized from GET…
tm1701
- 7,307
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2
votes
2 answers
How to unit test the Spring WebClient in java?
I have this code which uses WebClient to call a third party API.
public Mono callApi(String url) {
return webClient.get()
.uri(url)
.headers(httpHeaders -> httpHeaders.set(Constants.X_API_KEY,…
Gojo
- 151
- 7
2
votes
0 answers
How to manage tracing with Spring WebClient in Reactive way?
I have a method in EventService that calls an API and handle errors if there is any.
private Mono send(String accountId) {
accountIdBaggageField.updateValue(accountId);
logger.info("making the call");
Mono res =…
Süleyman Gezsat
- 73
- 8
2
votes
1 answer
Spring WebFlux - FilePart forward via webClient
I went through similar tickets (i.e. How to stream file from Multipart/form-data in Spring WebFlux), but apparently I have slightly different case.
High-level example (no error handling / no 'empty' checks):
Controller:
@ResponseStatus(code =…
asceta
- 272
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2
votes
1 answer
Is it possible to use Spring Webclient to post files to an endpoint expecting application/json without reading the files into memory?
I'm trying to POST to an endpoint that looks like this:
@PostMapping("/endpoint", consumes="application/json")
public ResponsePojo post(final @RequestBody UploadPojo uploadPojo) {
...
}
Where the request body looks like this:
public class…
billoot
- 77
- 15
2
votes
0 answers
Upload file to AWS S3 using presigned URL via Spring webclient error: "the Credential is mal-formed"
I'm using reactive spring and trying to upload a ".csv" file into AWS S3 using a presigned URL.
I spring webclient for this and my code snippet as below
Webclient bean
@Bean
public WebClient webClient(WebClient.Builder webClientBuilder)…
techmagister
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