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# wiremock-javas
Slackbot
12/21/2023, 10:33 AMThis message was deleted.
t
Tom
12/21/2023, 11:03 AMDo you want the response to be a binary file in its entirety, or do you want a byte array wrapped in JSON?
s
Seweryn
12/21/2023, 11:10 AM Copy code
public class FileContent {
@NotNull
@JsonProperty
private final byte[] content;Seweryn
12/21/2023, 9:16 PMThis is what I need to mock
Copy code
ResponseEntity<FileContent> response = restTemplate.exchange(apiURL, HttpMethod.GET, request, FileContent.class);t
Tom
12/21/2023, 9:17 PMI think a JSON array of numbers should get deserialised to a byte array. Have you tried this?
s
Seweryn
12/21/2023, 9:18 PMgetting that error
Could not extract response: no suitable HttpMessageConverter found for response type [class com.mydomain.FileContent] and content type [application/octet-stream]t
Tom
12/21/2023, 9:19 PMTry adding a response header
Content-Typeapplication/jsonTom
12/21/2023, 9:19 PM(The error suggests at least, that you’ve either not got one or it’s not one your framework recognises)
s
Seweryn
12/21/2023, 9:21 PMAdding 'application/json' causing that error
org.springframework.web.client.RestClientException: Error while extracting response for type [class com.mydomain.FileContent] and content type [application/json]; nested exception is org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Unexpected character ('%' (code 37)): expected a valid value (JSON String, Number, Array, Object or token 'null', 'true' or 'false'); nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character ('%' (code 37)): expected a valid value (JSON String, Number, Array, Object or token 'null', 'true' or 'false')300 Views