1 files changed, 93 insertions, 0 deletions
diff --git a/remote/cdp/JSONHandler.sys.mjs b/remote/cdp/JSONHandler.sys.mjs
new file mode 100644
index 0000000000..89e7ddab7c
--- /dev/null
+++ b/remote/cdp/JSONHandler.sys.mjs
@@ -0,0 +1,93 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  Log: "chrome://remote/content/shared/Log.sys.mjs",
+  Protocol: "chrome://remote/content/cdp/Protocol.sys.mjs",
+  RemoteAgentError: "chrome://remote/content/cdp/Error.sys.mjs",
+});
+
+XPCOMUtils.defineLazyModuleGetters(lazy, {
+  HTTP_404: "chrome://remote/content/server/HTTPD.jsm",
+  HTTP_505: "chrome://remote/content/server/HTTPD.jsm",
+});
+
+export class JSONHandler {
+  constructor(cdp) {
+    this.cdp = cdp;
+    this.routes = {
+      "/json/version": this.getVersion.bind(this),
+      "/json/protocol": this.getProtocol.bind(this),
+      "/json/list": this.getTargetList.bind(this),
+      "/json": this.getTargetList.bind(this),
+    };
+  }
+
+  getVersion() {
+    const mainProcessTarget = this.cdp.targetList.getMainProcessTarget();
+
+    const { userAgent } = Cc[
+      "@mozilla.org/network/protocol;1?name=http"
+    ].getService(Ci.nsIHttpProtocolHandler);
+
+    return {
+      Browser: `${Services.appinfo.name}/${Services.appinfo.version}`,
+      "Protocol-Version": "1.3",
+      "User-Agent": userAgent,
+      "V8-Version": "1.0",
+      "WebKit-Version": "1.0",
+      webSocketDebuggerUrl: mainProcessTarget.toJSON().webSocketDebuggerUrl,
+    };
+  }
+
+  getProtocol() {
+    return lazy.Protocol.Description;
+  }
+
+  getTargetList() {
+    return [...this.cdp.targetList].filter(x => x.type !== "browser");
+  }
+
+  // nsIHttpRequestHandler
+
+  handle(request, response) {
+    if (request.method != "GET") {
+      throw lazy.HTTP_404;
+    }
+
+    // Trim trailing slashes to conform with expected routes
+    const path = request.path.replace(/\/+$/, "");
+
+    if (!(path in this.routes)) {
+      throw lazy.HTTP_404;
+    }
+
+    try {
+      const body = this.routes[path]();
+      const payload = JSON.stringify(
+        body,
+        null,
+        lazy.Log.verbose ? "\t" : null
+      );
+
+      response.setStatusLine(request.httpVersion, 200, "OK");
+      response.setHeader("Content-Type", "application/json");
+      response.setHeader("Content-Security-Policy", "frame-ancestors 'none'");
+      response.write(payload);
+    } catch (e) {
+      new lazy.RemoteAgentError(e).notify();
+      throw lazy.HTTP_505;
+    }
+  }
+
+  // XPCOM
+
+  get QueryInterface() {
+    return ChromeUtils.generateQI(["nsIHttpRequestHandler"]);
+  }
+}