Bug 1354508 - Add filter option for network requests checking for a specific response header. r=ntim

MozReview-Commit-ID: E5wm5BgDJNU

--HG--
extra : rebase_source : ba4b21b7b53fa1f676d132f57556e86ff6fb163a

devtools/client/netmonitor/src/utils/filter-text-utils.js

@@ -41,6 +41,7 @@ const FILTER_FLAGS = [
   "mime-type",
   "larger-than",
   "is",
+  "has-response-header",
 ];
 
 /*
@@ -133,6 +134,14 @@ function isFlagFilterMatch(item, { type, value, negative }) {
     case "remote-ip":
       match = `${item.remoteAddress}:${item.remotePort}`.toLowerCase().includes(value);
       break;
+    case "has-response-header":
+      if (typeof item.responseHeaders === "object") {
+        let { headers } = item.responseHeaders;
+        match = headers.findIndex(h => h.name.toLowerCase() === value) > -1;
+      } else {
+        match = false;
+      }
+      break;
     case "cause":
       let causeType = item.cause.type;
       match = typeof causeType === "string" ?