[fix] broken HtmxResponse handling since 9cc73313

htmx-spring-boot/pom.xml

@@ -48,6 +48,11 @@
             <artifactId>spring-boot-starter-thymeleaf</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>io.rest-assured</groupId>
+            <artifactId>rest-assured</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>com.google.code.findbugs</groupId>
             <artifactId>jsr305</artifactId>

htmx-spring-boot/src/main/java/io/github/wimdeblauwe/htmx/spring/boot/mvc/HtmxExceptionHandlerExceptionResolver.java

@@ -18,10 +18,10 @@
  */
 public class HtmxExceptionHandlerExceptionResolver extends ExceptionHandlerExceptionResolver {
 
-    private final HtmxHandlerMethodAnnotationHandler handlerMethodAnnotationHandler;
+    private final HtmxHandlerMethodHandler htmxHandlerMethodHandler;
 
-    public HtmxExceptionHandlerExceptionResolver(HtmxHandlerMethodAnnotationHandler handlerMethodAnnotationHandler) {
-        this.handlerMethodAnnotationHandler = handlerMethodAnnotationHandler;
+    public HtmxExceptionHandlerExceptionResolver(HtmxHandlerMethodHandler htmxHandlerMethodHandler) {
+        this.htmxHandlerMethodHandler = htmxHandlerMethodHandler;
     }
 
     @Override
@@ -31,10 +31,14 @@ protected ModelAndView doResolveHandlerMethodException(HttpServletRequest reques
         ServletInvocableHandlerMethod exceptionHandlerMethod = this.getExceptionHandlerMethod(handlerMethod, exception, webRequest);
         if (exceptionHandlerMethod != null) {
             Method method = exceptionHandlerMethod.getMethod();
-            handlerMethodAnnotationHandler.handleMethod(method, request, response);
+            htmxHandlerMethodHandler.handleMethodAnnotations(method, request, response);
         }
 
-        return super.doResolveHandlerMethodException(request, response, handlerMethod, exception);
+        ModelAndView modelAndView = super.doResolveHandlerMethodException(request, response, handlerMethod, exception);
+
+        htmxHandlerMethodHandler.handleMethodArgument(request, response);
+
+        return modelAndView;
     }
 
 }

htmx-spring-boot/src/main/java/io/github/wimdeblauwe/htmx/spring/boot/mvc/HtmxHandlerInterceptor.java

@@ -1,67 +1,39 @@
 package io.github.wimdeblauwe.htmx.spring.boot.mvc;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import org.springframework.http.HttpHeaders;
 import org.springframework.web.method.HandlerMethod;
 import org.springframework.web.servlet.HandlerInterceptor;
+import org.springframework.web.servlet.ModelAndView;
 
 import java.lang.reflect.Method;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.stream.Collectors;
 
 /**
  * HandlerInterceptor that adds htmx specific headers to the response.
  */
 public class HtmxHandlerInterceptor implements HandlerInterceptor {
 
-    private final ObjectMapper objectMapper;
-    private final HtmxHandlerMethodAnnotationHandler handlerMethodAnnotationHandler;
+    private final HtmxHandlerMethodHandler htmxHandlerMethodHandler;
 
-    public HtmxHandlerInterceptor(ObjectMapper objectMapper, HtmxHandlerMethodAnnotationHandler handlerMethodAnnotationHandler) {
-        this.objectMapper = objectMapper;
-        this.handlerMethodAnnotationHandler = handlerMethodAnnotationHandler;
+    public HtmxHandlerInterceptor(HtmxHandlerMethodHandler htmxHandlerMethodHandler) {
+        this.htmxHandlerMethodHandler = htmxHandlerMethodHandler;
     }
 
     @Override
-    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
-
-        HtmxResponse htmxResponse = RequestContextUtils.getHtmxResponse(request);
-        if (htmxResponse != null) {
-            addHxTriggerHeaders(response, HtmxResponseHeader.HX_TRIGGER, htmxResponse.getTriggers());
-            addHxTriggerHeaders(response, HtmxResponseHeader.HX_TRIGGER_AFTER_SETTLE, htmxResponse.getTriggersAfterSettle());
-            addHxTriggerHeaders(response, HtmxResponseHeader.HX_TRIGGER_AFTER_SWAP, htmxResponse.getTriggersAfterSwap());
-
-            if (htmxResponse.getReplaceUrl() != null) {
-                response.setHeader(HtmxResponseHeader.HX_REPLACE_URL.getValue(), RequestContextUtils.createUrl(request, htmxResponse.getReplaceUrl(), htmxResponse.isContextRelative()));
-            }
-            if (htmxResponse.getPushUrl() != null) {
-                response.setHeader(HtmxResponseHeader.HX_PUSH_URL.getValue(), RequestContextUtils.createUrl(request, htmxResponse.getPushUrl(), htmxResponse.isContextRelative()));
-            }
-            if (htmxResponse.getRetarget() != null) {
-                response.setHeader(HtmxResponseHeader.HX_RETARGET.getValue(), htmxResponse.getRetarget());
-            }
-            if (htmxResponse.getReselect() != null) {
-                response.setHeader(HtmxResponseHeader.HX_RESELECT.getValue(), htmxResponse.getReselect());
-            }
-            if (htmxResponse.getReswap() != null) {
-                response.setHeader(HtmxResponseHeader.HX_RESWAP.getValue(), htmxResponse.getReswap().toHeaderValue());
-            }
-        }
+    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
+        htmxHandlerMethodHandler.handleMethodArgument(request, response);
     }
 
     @Override
     public boolean preHandle(HttpServletRequest request,
                              HttpServletResponse response,
                              Object handler) {
 
-        if (handler instanceof HandlerMethod) {
-            Method method = ((HandlerMethod) handler).getMethod();
-            setVary(request, response);
-            handlerMethodAnnotationHandler.handleMethod(method, request, response);
+        setVary(request, response);
+
+        if (handler instanceof HandlerMethod handlerMethod) {
+            htmxHandlerMethodHandler.handleMethodAnnotations(handlerMethod.getMethod(), request, response);
         }
 
         return true;
@@ -73,35 +45,4 @@ private void setVary(HttpServletRequest request, HttpServletResponse response) {
         }
     }
 
-    private void setHeaderJsonValue(HttpServletResponse response, HtmxResponseHeader header, Object value) {
-        try {
-            response.setHeader(header.getValue(), objectMapper.writeValueAsString(value));
-        } catch (JsonProcessingException e) {
-            throw new IllegalArgumentException("Unable to set header " + header.getValue() + " to " + value, e);
-        }
-    }
-
-    private void addHxTriggerHeaders(HttpServletResponse response, HtmxResponseHeader headerName, Collection<HtmxTrigger> triggers) {
-        if (triggers.isEmpty()) {
-            return;
-        }
-
-        // separate event names by commas if no additional details are available
-        if (triggers.stream().allMatch(t -> t.getEventDetail() == null)) {
-            String value = triggers.stream()
-                                   .map(HtmxTrigger::getEventName)
-                                   .collect(Collectors.joining(","));
-
-            response.setHeader(headerName.getValue(), value);
-            return;
-        }
-
-        // multiple events with or without details
-        var triggerMap = new HashMap<String, Object>();
-        for (HtmxTrigger trigger : triggers) {
-            triggerMap.put(trigger.getEventName(), trigger.getEventDetail());
-        }
-        setHeaderJsonValue(response, headerName, triggerMap);
-    }
-
 }

htmx-spring-boot/src/main/java/io/github/wimdeblauwe/htmx/spring/boot/mvc/HtmxHandlerMethodAnnotationHandler.java → htmx-spring-boot/src/main/java/io/github/wimdeblauwe/htmx/spring/boot/mvc/HtmxHandlerMethodHandler.java

@@ -5,24 +5,55 @@
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import org.springframework.core.annotation.AnnotatedElementUtils;
+import org.springframework.http.HttpHeaders;
 
 import java.lang.reflect.Method;
 import java.time.Duration;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.stream.Collectors;
 
 /**
- * A handler for processing htmx annotations present on exception handler methods.
+ * A handler for processing {@link HtmxResponse} and annotations present on handler methods.
  *
  * @since 3.6.2
  */
-class HtmxHandlerMethodAnnotationHandler {
+class HtmxHandlerMethodHandler {
 
     private final ObjectMapper objectMapper;
 
-    public HtmxHandlerMethodAnnotationHandler(ObjectMapper objectMapper) {
+    public HtmxHandlerMethodHandler(ObjectMapper objectMapper) {
         this.objectMapper = objectMapper;
     }
 
-    public void handleMethod(Method method, HttpServletRequest request, HttpServletResponse response) {
+    public void handleMethodArgument(HttpServletRequest request, HttpServletResponse response) {
+
+        HtmxResponse htmxResponse = RequestContextUtils.getHtmxResponse(request);
+        if (htmxResponse != null) {
+            addHxTriggerHeaders(response, HtmxResponseHeader.HX_TRIGGER, htmxResponse.getTriggers());
+            addHxTriggerHeaders(response, HtmxResponseHeader.HX_TRIGGER_AFTER_SETTLE, htmxResponse.getTriggersAfterSettle());
+            addHxTriggerHeaders(response, HtmxResponseHeader.HX_TRIGGER_AFTER_SWAP, htmxResponse.getTriggersAfterSwap());
+
+            if (htmxResponse.getReplaceUrl() != null) {
+                response.setHeader(HtmxResponseHeader.HX_REPLACE_URL.getValue(), RequestContextUtils.createUrl(request, htmxResponse.getReplaceUrl(), htmxResponse.isContextRelative()));
+            }
+            if (htmxResponse.getPushUrl() != null) {
+                response.setHeader(HtmxResponseHeader.HX_PUSH_URL.getValue(), RequestContextUtils.createUrl(request, htmxResponse.getPushUrl(), htmxResponse.isContextRelative()));
+            }
+            if (htmxResponse.getRetarget() != null) {
+                response.setHeader(HtmxResponseHeader.HX_RETARGET.getValue(), htmxResponse.getRetarget());
+            }
+            if (htmxResponse.getReselect() != null) {
+                response.setHeader(HtmxResponseHeader.HX_RESELECT.getValue(), htmxResponse.getReselect());
+            }
+            if (htmxResponse.getReswap() != null) {
+                response.setHeader(HtmxResponseHeader.HX_RESWAP.getValue(), htmxResponse.getReswap().toHeaderValue());
+            }
+        }
+    }
+
+    public void handleMethodAnnotations(Method method, HttpServletRequest request, HttpServletResponse response) {
+
         setHxLocation(request, response, method);
         setHxPushUrl(request, response, method);
         setHxRedirect(request, response, method);
@@ -36,6 +67,29 @@ public void handleMethod(Method method, HttpServletRequest request, HttpServletR
         setHxRefresh(response, method);
     }
 
+    private void addHxTriggerHeaders(HttpServletResponse response, HtmxResponseHeader headerName, Collection<HtmxTrigger> triggers) {
+        if (triggers.isEmpty()) {
+            return;
+        }
+
+        // separate event names by commas if no additional details are available
+        if (triggers.stream().allMatch(t -> t.getEventDetail() == null)) {
+            String value = triggers.stream()
+                                   .map(HtmxTrigger::getEventName)
+                                   .collect(Collectors.joining(","));
+
+            response.setHeader(headerName.getValue(), value);
+            return;
+        }
+
+        // multiple events with or without details
+        var triggerMap = new HashMap<String, Object>();
+        for (HtmxTrigger trigger : triggers) {
+            triggerMap.put(trigger.getEventName(), trigger.getEventDetail());
+        }
+        setHeaderJsonValue(response, headerName, triggerMap);
+    }
+
     private void setHxLocation(HttpServletRequest request, HttpServletResponse response, Method method) {
         HxLocation methodAnnotation = AnnotatedElementUtils.findMergedAnnotation(method, HxLocation.class);
         if (methodAnnotation != null) {

htmx-spring-boot/src/main/java/io/github/wimdeblauwe/htmx/spring/boot/mvc/HtmxMvcAutoConfiguration.java

@@ -24,11 +24,11 @@
 public class HtmxMvcAutoConfiguration implements WebMvcRegistrations, WebMvcConfigurer {
 
     private final ObjectMapper objectMapper;
-    private final HtmxHandlerMethodAnnotationHandler handlerMethodAnnotationHandler;
+    private final HtmxHandlerMethodHandler handlerMethodHandler;
 
     HtmxMvcAutoConfiguration() {
         this.objectMapper = JsonMapper.builder().build();
-        this.handlerMethodAnnotationHandler = new HtmxHandlerMethodAnnotationHandler(this.objectMapper);
+        this.handlerMethodHandler = new HtmxHandlerMethodHandler(this.objectMapper);
     }
 
     @Override
@@ -38,7 +38,7 @@ public RequestMappingHandlerMapping getRequestMappingHandlerMapping() {
 
     @Override
     public void addInterceptors(InterceptorRegistry registry) {
-        registry.addInterceptor(new HtmxHandlerInterceptor(objectMapper, handlerMethodAnnotationHandler));
+        registry.addInterceptor(new HtmxHandlerInterceptor(handlerMethodHandler));
     }
 
     @Override
@@ -54,7 +54,7 @@ public void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> handler
 
     @Override
     public ExceptionHandlerExceptionResolver getExceptionHandlerExceptionResolver() {
-        return new HtmxExceptionHandlerExceptionResolver(handlerMethodAnnotationHandler);
+        return new HtmxExceptionHandlerExceptionResolver(handlerMethodHandler);
     }
 
     @Bean