DataDog · robertomonteromiguel · Dec 12, 2025 · Dec 3, 2025 · Dec 3, 2025 · Dec 3, 2025
@@ -41,6 +41,30 @@ The following text may be written to the body of the response:
 Hello headers!\n
 ```
 
+### GET /html
+
+This endpoint returns an HTML page instead of a JSON response. It is used to test features that require HTML content, such as RUM (Real User Monitoring) auto-injection.
+
+**Important:** This is a server-rendered HTML endpoint, not a REST/JSON endpoint. The tracer may inject additional scripts (like the RUM SDK) into the HTML response when RUM injection is enabled.
+
+The response content type must be `text/html`.
+
+The HTML content **must** be :
+
+```html
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Hello</title>
+</head>
+<body>
+    <h1>Hello</h1>
+</body>
+</html>
+```
+
+**Note:** When RUM injection is enabled via environment variables (`DD_RUM_ENABLED=true`), the tracer will automatically inject the RUM SDK script into the HTML response.
+
 ### GET /identify
 
 This endpoint must set the following tags on the local root span:

@@ -77,6 +77,7 @@ manifest:
   tests/test_profiling.py: missing_feature (missing profiling module in weblog)
   tests/test_protobuf.py: missing_feature
   tests/test_resource_renaming.py: missing_feature
+  tests/test_rum_injection.py: irrelevant (RUM injection only supported for Java)
   tests/test_sampling_rates.py::Test_SampleRateFunction: v1.0.0  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisionAdded: v1.0.0  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisions: v1.0.0  # real version unknown

@@ -234,6 +234,7 @@ manifest:
   tests/test_miscs.py: irrelevant
   tests/test_protobuf.py: missing_feature
   tests/test_resource_renaming.py: missing_feature
+  tests/test_rum_injection.py: irrelevant (RUM injection only supported for Java)
   tests/test_sampling_rates.py::Test_SampleRateFunction: v1.0.0  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisionAdded: v1.0.0  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisions: v1.0.0  # real version unknown

@@ -571,6 +571,7 @@ manifest:
         uds: missing_feature (to be confirmed)
   tests/test_protobuf.py::Test_Protobuf: v3.15.0
   tests/test_resource_renaming.py: missing_feature
+  tests/test_rum_injection.py: irrelevant (RUM injection only supported for Java)
   tests/test_sampling_rates.py::Test_SampleRateFunction: v3.11.1  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisionAdded: v3.11.1  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisions: v3.11.1  # real version unknown

@@ -857,6 +857,7 @@ manifest:
   tests/test_library_conf.py::Test_HeaderTags_Wildcard_Response_Headers: missing_feature
   tests/test_protobuf.py: missing_feature
   tests/test_resource_renaming.py: missing_feature
+  tests/test_rum_injection.py: irrelevant (RUM injection only supported for Java)
   tests/test_sampling_rates.py::Test_SampleRateFunction: v1.72.1  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisionAdded: v1.72.1  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisions: v1.72.1  # real version unknown

@@ -2623,6 +2623,10 @@ manifest:
         "*": missing_feature
         spring-boot: v1.47.0
   tests/test_resource_renaming.py: missing_feature
+  tests/test_rum_injection.py:
+    - weblog_declaration:
+        "*": irrelevant (RUM injection only supported for spring-boot)
+        spring-boot: v1.49.0
   tests/test_sampling_rates.py::Test_SampleRateFunction:
     - weblog_declaration:
         "*": v1.49.0

@@ -1621,6 +1621,7 @@ manifest:
     - weblog_declaration:
         "*": *ref_5_81_0
         nextjs: missing_feature
+  tests/test_rum_injection.py: irrelevant (RUM injection only supported for Java)
   tests/test_sampling_rates.py::Test_SampleRateFunction: *ref_5_54_0
   tests/test_sampling_rates.py::Test_SamplingDecisionAdded: *ref_5_17_0
   tests/test_sampling_rates.py::Test_SamplingDecisions: *ref_5_54_0

@@ -560,6 +560,7 @@ manifest:
   tests/test_profiling.py::Test_Profile: missing_feature (profiling seems not to be activated)
   tests/test_protobuf.py: missing_feature
   tests/test_resource_renaming.py: missing_feature
+  tests/test_rum_injection.py: irrelevant (RUM injection only supported for Java)
   tests/test_sampling_rates.py::Test_SampleRateFunction: v1.13.0+4663b2fa7c20c6920f347d059b57dc2a419cb7f7
   tests/test_sampling_rates.py::Test_SamplingDecisionAdded: v1.7.2  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisions: v1.13.0+4663b2fa7c20c6920f347d059b57dc2a419cb7f7

@@ -1344,6 +1344,7 @@ manifest:
   tests/test_protobuf.py: missing_feature
   tests/test_resource_renaming.py::Test_Resource_Renaming_HTTP_Endpoint_Tag: v3.17.0
   tests/test_resource_renaming.py::Test_Resource_Renaming_Stats_Aggregation_Keys: v3.17.0
+  tests/test_rum_injection.py: irrelevant (RUM injection only supported for Java)
   tests/test_sampling_rates.py::Test_SampleRateFunction: v3.6.0+dev
   tests/test_sampling_rates.py::Test_SamplingDecisionAdded: v2.8.0
   tests/test_sampling_rates.py::Test_SamplingDecisions: v3.6.0+dev

@@ -236,4 +236,5 @@ manifest:
         "*": v8.113.0
         alb-multi: v8.114.0.dev
   tests/test_resource_renaming.py: missing_feature
+  tests/test_rum_injection.py: irrelevant (RUM injection only supported for Java)
   tests/test_v1_payloads.py: missing_feature
@@ -826,6 +826,7 @@ manifest:
         sinatra41: irrelevant
         uds-sinatra: irrelevant
   tests/test_resource_renaming.py::Test_Resource_Renaming_Stats_Aggregation_Keys: missing_feature
+  tests/test_rum_injection.py: irrelevant (RUM injection only supported for Java)
   tests/test_sampling_rates.py::Test_SampleRateFunction: v2.15.0  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisionAdded: v2.12.1  # real version unknown
   tests/test_sampling_rates.py::Test_SamplingDecisions: v2.15.0  # real version unknown

@@ -0,0 +1,42 @@
+# Unless explicitly stated otherwise all files in this repository are licensed under the the Apache License Version 2.0.
+# This product includes software developed at Datadog (https://www.datadoghq.com/).
+# Copyright 2021 Datadog, Inc.
+
+"""Tests for RUM (Real User Monitoring) support scenario"""
+
+from html.parser import HTMLParser
+
+from utils import weblog, features
+
+
+@features.rum_injection
+class Test_RUM_Injection:
+    """Basic tests to verify RUM injection is working"""
+
+    def setup_rum_enabled(self):
+        """Make a request to generate HTML with RUM configuration enabled"""
+        self.response = weblog.get("/html")
+
+    def test_rum_enabled(self):
+        """Verify that RUM scripts are injected into the HTML response"""
+        assert self.response.status_code == 200, f"Expected 200, got {self.response.status_code}"
+
+        html = self.response.text
+
+        # Validate HTML is well-formed
+        assert _is_valid_html(html), "HTML is malformed"
+
+        # Validate RUM SDK script is present (ignoring version number)
+        assert "https://www.datadoghq-browser-agent.com/datadog-rum-v" in html, "RUM SDK script not found"
+
+        # Validate RUM initialization call is present
+        assert "window.DD_RUM.init" in html, "RUM init call not found"
+
+
+def _is_valid_html(html: str) -> bool:
+    """Check if HTML is well-formed"""
+    try:
+        HTMLParser().feed(html)
+        return True
+    except Exception:
+        return False
@@ -49,6 +49,7 @@
         "servlet.forward": "java-web-servlet-dispatcher",
         "servlet.response": "java-web-servlet-response",
         "grpc.server": "grpc-server",
+        "response.render": "spring-webmvc",
     },
     "spring-boot-jetty": {
         "servlet.request": "jetty-server",
@@ -57,19 +58,22 @@
         "servlet.forward": "java-web-servlet-dispatcher",
         "servlet.response": "java-web-servlet-response",
         "servlet.error": "java-web-servlet-dispatcher",
+        "response.render": "spring-webmvc",
     },
     "spring-boot-3-native": {
         "servlet.request": "tomcat-server",
         "spring.handler": "spring-web-controller",
         "hsqldb.query": "java-jdbc-statement",
         "servlet.response": "java-web-servlet-response",
+        "response.render": "spring-webmvc",
     },
     "spring-boot-openliberty": {
         "servlet.request": ["liberty-server", "java-web-servlet"],
         "hsqldb.query": "java-jdbc-statement",
         "spring.handler": "spring-web-controller",
         "servlet.forward": "java-web-servlet-dispatcher",
         "servlet.response": "java-web-servlet-response",
+        "response.render": "spring-webmvc",
     },
     "spring-boot-undertow": {
         "servlet.request": "undertow-http-server",
@@ -78,6 +82,7 @@
         "undertow-http.request": "undertow-http-server",
         "servlet.response": "java-web-servlet-response",
         "servlet.forward": "java-web-servlet-dispatcher",
+        "response.render": "spring-webmvc",
     },
     "spring-boot-wildfly": {
         "servlet.request": "undertow-http-server",
@@ -86,13 +91,15 @@
         "servlet.forward": "java-web-servlet-dispatcher",
         "spring.handler": "spring-web-controller",
         "servlet.response": "java-web-servlet-response",
+        "response.render": "spring-webmvc",
     },
     "spring-boot-payara": {
         "servlet.request": "java-web-servlet",
         "hsqldb.query": "java-jdbc-statement",
         "servlet.forward": "java-web-servlet-dispatcher",
         "spring.handler": "spring-web-controller",
         "servlet.response": "java-web-servlet-response",
+        "response.render": "spring-webmvc",
     },
     "resteasy-netty3": {"netty.request": ["netty", "jax-rs"], "jax-rs.request": "jax-rs-controller"},
     "akka-http": "akka-http-server",
@@ -118,6 +125,7 @@
         "hsqldb.query": "java-jdbc-statement",
         "spring.handler": "spring-web-controller",
         "servlet.forward": "java-web-servlet-dispatcher",
+        "response.render": "spring-webmvc",
     },
     "vertx3": {"netty.request": "netty", "vertx.route-handler": "vertx"},
     "vertx4": {"netty.request": "netty", "vertx.route-handler": "vertx"},

@@ -65,6 +65,10 @@ def __init__(self, name: str):
                 # but we need proper investigation to see how to properly tests everything
                 # waiting for this audit, we disable API security
                 "DD_API_SECURITY_ENABLED": "false",
+                "DD_RUM_ENABLED": "true",
+                "DD_RUM_APPLICATION_ID": "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa",
+                "DD_RUM_CLIENT_TOKEN": "pubaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+                "DD_RUM_REMOTE_CONFIGURATION_ID": "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa",
             },
             agent_env={"SOME_SECRET_ENV": "leaked-env-var"},
             include_postgres_db=True,

@@ -2638,6 +2638,14 @@ def llm_observability_prompts(test_object):
         """
         return _mark_test_object(test_object, feature_id=517, owner=_Owner.ml_observability)
 
+    @staticmethod
+    def rum_injection(test_object):
+        """RUM Injection
+
+        https://feature-parity.us1.prod.dog/#/?feature=525
+        """
+        return _mark_test_object(test_object, feature_id=525, owner=_Owner.sdk_capabilities)
+
     @staticmethod
     def apm_openai_completions(test_object):
         """APM supports OpenAI completions interactions

@@ -24,6 +24,10 @@
                 </exclusion>
             </exclusions>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-jdbc</artifactId>

@@ -184,7 +184,7 @@ Map<String, Object> healtchcheck() {
         return response;
     }
 
-    @GetMapping("/headers")
+    @GetMapping(value = "/headers", produces = "text/plain")
     String headers(HttpServletResponse response) {
         response.setHeader("content-language", "en-US");
         return "012345678901234567890123456789012345678901";

@@ -0,0 +1,14 @@
+package com.datadoghq.system_tests.springboot;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+public class HtmlController {
+
+    @GetMapping("/html")
+    public String html() {
+        return "hello";
+    }
+}
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Hello from view</title>
+</head>
+<body>
+    <h1>Hello from view</h1>
+</body>
+</html>