feat(outgoingmessage-headers)

recipes/outgoingmessage-headers/codemod.yaml

@@ -0,0 +1,22 @@
+schema_version: "1.0"
+name: "@nodejs/outgoingmessage-headers"
+version: 1.0.0
+description: Migrate deprecated usages of OutgoingMessage.prototype._headers and ._headerNames to public HTTP header APIs
+author: Node.js Team
+license: MIT
+workflow: workflow.yaml
+category: migration
+
+targets:
+  languages:
+    - javascript
+    - typescript
+
+keywords:
+  - transformation
+  - migration
+  - http
+
+registry:
+  access: public
+  visibility: public

recipes/outgoingmessage-headers/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "@nodejs/outgoingmessage-headers",
+  "version": "1.0.0",
+  "description": "Migrate deprecated usages of OutgoingMessage.prototype._headers and ._headerNames to the official HTTP header APIs.",
+  "type": "module",
+  "scripts": {
+    "test": "npx codemod jssg test -l typescript ./src/workflow.ts ./"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/nodejs/userland-migrations.git",
+    "directory": "recipes/outgoingmessage-headers",
+    "bugs": "https://github.com/nodejs/userland-migrations/issues"
+  },
+  "author": "elvessilvavieira (Elves Vieira)",
+  "license": "MIT",
+  "homepage": "https://github.com/nodejs/userland-migrations/blob/main/recipes/outgoingmessage-headers/README.md",
+  "devDependencies": {
+    "@codemod.com/jssg-types": "^1.0.9"
+  },
+  "dependencies": {
+    "@nodejs/codemod-utils": "*"
+  }
+}

recipes/outgoingmessage-headers/src/workflow.ts

@@ -0,0 +1,90 @@
+import type { SgRoot, Edit } from "@codemod.com/jssg-types/main";
+import type Js from "@codemod.com/jssg-types/langs/javascript";
+
+export default function transform(root: SgRoot<Js>): string | null {
+  const rootNode = root.root();
+  const edits: Edit[] = [];
+  let hasChanges = false;
+
+  {
+    const matches = rootNode.findAll({
+      rule: { pattern: "$OBJ._headers[$KEY]" },
+    });
+    for (const m of matches) {
+      const obj = m.getMatch("OBJ");
+      const key = m.getMatch("KEY");
+      if (!obj || !key) continue;
+
+      edits.push(m.replace(`${obj.text()}.getHeader(${key.text()})`));
+      hasChanges = true;
+    }
+  }
+
+  {
+    const matches = rootNode.findAll({
+      rule: { pattern: "$KEY in $OBJ._headers" },
+    });
+    for (const m of matches) {
+      const obj = m.getMatch("OBJ");
+      const key = m.getMatch("KEY");
+      if (!obj || !key) continue;
+
+      edits.push(m.replace(`${obj.text()}.hasHeader(${key.text()})`));
+      hasChanges = true;
+    }
+  }
+
+  {
+    const matches = rootNode.findAll({
+      rule: { pattern: "Object.keys($OBJ._headers)" },
+    });
+    for (const m of matches) {
+      const obj = m.getMatch("OBJ");
+      if (!obj) continue;
+
+      edits.push(m.replace(`${obj.text()}.getHeaderNames()`));
+      hasChanges = true;
+    }
+  }
+
+  {
+    const matches = rootNode.findAll({
+      rule: { pattern: "$OBJ._headerNames" },
+    });
+    for (const m of matches) {
+      const obj = m.getMatch("OBJ");
+      if (!obj) continue;
+
+      edits.push(m.replace(`${obj.text()}.getHeaderNames()`));
+      hasChanges = true;
+    }
+  }
+
+  {
+    const matches = rootNode.findAll({
+      rule: { pattern: "$OBJ._headers" },
+    });
+    for (const m of matches) {
+      const obj = m.getMatch("OBJ");
+      if (!obj) continue;
+
+      const text = m.text();
+      if (text.includes("[")) continue;
+
+      const parent = m.parent();
+      const parentText = parent?.text() ?? "";
+
+      if (parentText.startsWith("Object.keys(")) continue;
+
+      if (parentText.includes("=") && parentText.trim().startsWith(obj.text())) {
+        continue;
+      }
+
+      edits.push(m.replace(`${obj.text()}.getHeaders()`));
+      hasChanges = true;
+    }
+  }
+
+  if (!hasChanges) return null;
+  return rootNode.commitEdits(edits);
+}

recipes/outgoingmessage-headers/tests/expected/basic.js

@@ -0,0 +1,13 @@
+function example(response, request) {
+  const all = response.getHeaders();
+  const ct = response.getHeader("content-type");
+  if (response.hasHeader("content-length")) console.log("has length");
+  console.log(response.getHeaderNames());
+  console.log(response.getHeaderNames());
+
+  const allReq = request.getHeaders();
+  const ua = request.getHeader('user-agent');
+  if (request.hasHeader('accept')) console.log('has accept');
+  console.log(request.getHeaderNames());
+  console.log(request.getHeaderNames());
+}

recipes/outgoingmessage-headers/tests/input/basic.js

@@ -0,0 +1,13 @@
+function example(response, request) {
+  const all = response._headers;
+  const ct = response._headers["content-type"];
+  if ("content-length" in response._headers) console.log("has length");
+  console.log(Object.keys(response._headers));
+  console.log(response._headerNames);
+
+  const allReq = request._headers;
+  const ua = request._headers['user-agent'];
+  if ('accept' in request._headers) console.log('has accept');
+  console.log(Object.keys(request._headers));
+  console.log(request._headerNames);
+}

recipes/outgoingmessage-headers/workflow.yaml

@@ -0,0 +1,25 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/codemod-com/codemod/refs/heads/main/schemas/workflow.json
+
+version: "1"
+
+nodes:
+  - id: apply-transforms
+    name: Apply AST Transformations
+    type: automatic
+    steps:
+      - name: Replace deprecated OutgoingMessage private header fields.
+        js-ast-grep:
+          js_file: src/workflow.ts
+          base_path: .
+          include:
+            - "**/*.js"
+            - "**/*.jsx"
+            - "**/*.mjs"
+            - "**/*.cjs"
+            - "**/*.cts"
+            - "**/*.mts"
+            - "**/*.ts"
+            - "**/*.tsx"
+          exclude:
+            - "**/node_modules/**"
+          language: typescript