🌱 envoy: Feature Request: In lua http filter add ability to set the contents of the body

solutions/cncf-generated/envoy/envoy-5998-feature-request-in-lua-http-filter-add-ability-to-set-the-contents-of.json

@@ -0,0 +1,77 @@
+{
+  "version": "kc-mission-v1",
+  "name": "envoy-5998-feature-request-in-lua-http-filter-add-ability-to-set-the-contents-of",
+  "missionClass": "solution",
+  "author": "KubeStellar Bot",
+  "authorGithub": "kubestellar",
+  "mission": {
+    "title": "envoy: Feature Request: In lua http filter add ability to set the contents of the body",
+    "description": "Feature Request: In lua http filter add ability to set the contents of the body. Requested by 18+ users.",
+    "type": "feature",
+    "status": "completed",
+    "steps": [
+      {
+        "title": "Check current envoy deployment",
+        "description": "Verify your envoy version and configuration:\n```bash\nkubectl get pods -n envoy -l app.kubernetes.io/name=envoy\nhelm list -n envoy 2>/dev/null || echo \"Not installed via Helm\"\n```\nThis feature requires a working envoy installation."
+      },
+      {
+        "title": "Review envoy configuration",
+        "description": "Inspect the relevant envoy configuration:\n```bash\nkubectl get all -n envoy -l app.kubernetes.io/name=envoy\nkubectl get configmap -n envoy -l app.kubernetes.io/part-of=envoy\n```\n_Feature Request_: **In lua http filter add ability to set the contents of the body**\n\n```yaml\nfilter_chains:\n- filters:\n  - name: envoy.http_connection_manager\n    config:\n      http_filters:\n        - name: envoy.lua\n          config:\n           "
+      },
+      {
+        "title": "Apply the fix for Feature Request: In lua http filter add ability to set the…",
+        "description": "Commit Message: This patch adds `setBytes()` API to the buffer wrapper by making the wrapped buffer to be mutable. This allows rewriting upstream data in the response path.\n\nRisk Level: Low\nTesting: Added unit and integration tests.\nDocs Changes: Added\nRelease Notes: Added\n```yaml\nfilter_chains:\n- filters:\n  - name: envoy.http_connection_manager\n    config:\n      http_filters:\n        - name: envoy.lua\n          config:\n            inline_code: |\n              function envoy_on_response(response_handle)\n                if response_handle:headers():get(\":status\") != \"200\" then\n                  response_handle:body():set('[]')\n                end\n              end\n```"
+      },
+      {
+        "title": "Verify the feature works",
+        "description": "Test that the new capability is working as expected:\n```bash\nkubectl get pods -n envoy -l app.kubernetes.io/name=envoy\nkubectl get events -n envoy --sort-by='.lastTimestamp' | tail -10\n```\nConfirm the feature described in \"Feature Request: In lua http filter add ability to set the…\" is functioning correctly."
+      }
+    ],
+    "resolution": {
+      "summary": "Commit Message: This patch adds `setBytes()` API to the buffer wrapper by making the wrapped buffer to be mutable. This allows rewriting upstream data in the response path.\n\nRisk Level: Low\nTesting: Added unit and integration tests.\nDocs Changes: Added\nRelease Notes: Added",
+      "codeSnippets": [
+        "filter_chains:\n- filters:\n  - name: envoy.http_connection_manager\n    config:\n      http_filters:\n        - name: envoy.lua\n          config:\n            inline_code: |\n              function envoy_on_response(response_handle)\n                if response_handle:headers():get(\":status\") != \"200\" then\n                  response_handle:body():set('[]')\n                end\n              end",
+        "- name: envoy.filters.http.lua\n            typed_config:\n              \"@type\": type.googleapis.com/envoy.config.filter.http.lua.v2.Lua\n              inline_code: |\n                function envoy_on_request(request_handle)\n                end\n                function envoy_on_response(response_handle)\n                  response_handle:headers():replace(\"content-length\", 6)\n                  response_handle:body():set(\"hello\\n\")\n                end",
+        "content_length = response_handle:body():set(\"hello\\n\")\nresponse_handle:headers():replace(\"content-length\", content_length)"
+      ]
+    }
+  },
+  "metadata": {
+    "tags": [
+      "envoy",
+      "graduated",
+      "networking",
+      "feature"
+    ],
+    "cncfProjects": [
+      "envoy"
+    ],
+    "targetResourceKinds": [],
+    "difficulty": "beginner",
+    "issueTypes": [
+      "feature"
+    ],
+    "maturity": "graduated",
+    "sourceUrls": {
+      "issue": "https://github.com/envoyproxy/envoy/issues/5998",
+      "repo": "https://github.com/envoyproxy/envoy",
+      "pr": "https://github.com/envoyproxy/envoy/pull/13172"
+    },
+    "reactions": 18,
+    "comments": 11,
+    "synthesizedBy": "copilot"
+  },
+  "prerequisites": {
+    "kubernetes": ">=1.24",
+    "tools": [
+      "kubectl"
+    ],
+    "description": "A running Kubernetes cluster with envoy installed or the issue environment reproducible."
+  },
+  "security": {
+    "scannedAt": "2026-03-23T06:32:07.626Z",
+    "scannerVersion": "cncf-gen-3.0.0",
+    "sanitized": true,
+    "findings": []
+  }
+}