Add max-buffer-size and fix app deps

functions/function/http-request-function/src/main/java/org/springframework/cloud/fn/http/request/HttpRequestFunctionConfiguration.java

@@ -47,8 +47,10 @@ public class HttpRequestFunctionConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean(WebClient.class)
-	public WebClient webClient() {
+	public WebClient webClient(HttpRequestFunctionProperties properties) {
 		return WebClient.builder()
+				.codecs(clientCodecConfigurer ->
+						clientCodecConfigurer.defaultCodecs().maxInMemorySize(properties.getMaximumBufferSize()))
 				.build();
 	}
 

functions/function/http-request-function/src/main/java/org/springframework/cloud/fn/http/request/HttpRequestFunctionProperties.java

@@ -17,6 +17,7 @@
 package org.springframework.cloud.fn.http.request;
 
 import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Positive;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.expression.Expression;
@@ -51,6 +52,13 @@ public class HttpRequestFunctionProperties {
 	 */
 	private long timeout = 30_000;
 
+	/**
+	 * Maximum buffer size in bytes allocated for input stream buffers. Defaults to 256k.
+	 * Increase, as necessary, for posting or getting large binary content.
+	 */
+
+	private int maximumBufferSize = 256 * 1024;
+
 	/**
 	 * A SpEL expression against incoming message to determine the URL to use.
 	 */
@@ -111,6 +119,15 @@ public class HttpRequestFunctionProperties {
 		this.timeout = timeout;
 	}
 
+	@Positive
+	public int getMaximumBufferSize() {
+		return maximumBufferSize;
+	}
+
+	public void setMaximumBufferSize(int maximumBufferSize) {
+		this.maximumBufferSize = maximumBufferSize;
+	}
+
 	public Expression getBodyExpression() {
 		return bodyExpression;
 	}