1 files changed, 59 insertions, 0 deletions
diff --git a/devtools/client/netmonitor/src/components/request-list/RequestListColumnResponseHeader.js b/devtools/client/netmonitor/src/components/request-list/RequestListColumnResponseHeader.js
new file mode 100644
index 0000000000..de02da0bc5
--- /dev/null
+++ b/devtools/client/netmonitor/src/components/request-list/RequestListColumnResponseHeader.js
@@ -0,0 +1,59 @@
+/* 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/. */
+
+"use strict";
+
+const {
+  Component,
+} = require("resource://devtools/client/shared/vendor/react.js");
+const dom = require("resource://devtools/client/shared/vendor/react-dom-factories.js");
+const PropTypes = require("resource://devtools/client/shared/vendor/react-prop-types.js");
+const {
+  getResponseHeader,
+  fetchNetworkUpdatePacket,
+} = require("resource://devtools/client/netmonitor/src/utils/request-utils.js");
+
+/**
+ * Renders a response header column in the requests list.  The actual
+ * header to show is passed as a prop.
+ */
+class RequestListColumnResponseHeader extends Component {
+  static get propTypes() {
+    return {
+      connector: PropTypes.object.isRequired,
+      item: PropTypes.object.isRequired,
+      header: PropTypes.string.isRequired,
+    };
+  }
+
+  componentDidMount() {
+    const { item, connector } = this.props;
+    fetchNetworkUpdatePacket(connector.requestData, item, ["responseHeaders"]);
+  }
+
+  // FIXME: https://bugzilla.mozilla.org/show_bug.cgi?id=1774507
+  UNSAFE_componentWillReceiveProps(nextProps) {
+    const { item, connector } = nextProps;
+    fetchNetworkUpdatePacket(connector.requestData, item, ["responseHeaders"]);
+  }
+
+  shouldComponentUpdate(nextProps) {
+    const currHeader = getResponseHeader(this.props.item, this.props.header);
+    const nextHeader = getResponseHeader(nextProps.item, nextProps.header);
+    return currHeader !== nextHeader;
+  }
+
+  render() {
+    const header = getResponseHeader(this.props.item, this.props.header);
+    return dom.td(
+      {
+        className: "requests-list-column requests-list-response-header",
+        title: header,
+      },
+      header
+    );
+  }
+}
+
+module.exports = RequestListColumnResponseHeader;