Strip leading www. from hostname when reading explorer name (#60)

Author: hasparus

packages/entrypoint/src/index.ts

@@ -17,7 +17,10 @@ log("Starting on", { hostname, pathname, search });
 // prefix of the hostname is passed to `explorer` search param
 // @see vscode-host/src/deth/commands/ethViewerCommands.ts
 if (hostname.endsWith(".deth.net") && !url.searchParams.get("explorer")) {
-  url.searchParams.set("explorer", hostname.slice(0, -9));
+  url.searchParams.set(
+    "explorer",
+    hostname.slice(0, -9 /* length of '.deth.net' */)
+  );
 }
 
 log("setting iframe src:", url.href);

packages/vscode-host/src/deth/commands/ethViewerCommands.test.ts

@@ -22,6 +22,14 @@ describe("ethViewerCommands", () => {
 
       expect(getApiName()).toEqual("etherscan");
     });
+
+    it('strips leading "www." from hostname', () => {
+      givenUrl(
+        "https://www.bscscan.deth.net/token/0x2170ed0880ac9a755fd29b2688956bd959f933f8"
+      );
+
+      expect(getApiName()).toEqual("bscscan");
+    });
   });
 
   describe(getContractAddress.name, () => {

packages/vscode-host/src/deth/commands/ethViewerCommands.ts

@@ -17,18 +17,16 @@ export const ethViewerCommands = {
     return path.startsWith("0x") ? path : undefined;
   },
   getApiName: (): string | undefined => {
-    const { hostname } = window.location;
+    const { hostname, search } = window.location;
+    let res: string | undefined = undefined;
 
-    const searchParam = new URLSearchParams(window.location.search).get(
-      "explorer"
-    );
-
-    if (searchParam) return searchParam;
+    const searchParam = new URLSearchParams(search).get("explorer");
+    if (searchParam) res = searchParam;
 
     // @todo this can be deprecated after we deploy and configure iframe entrypoints
-    if (hostname.endsWith(".deth.net")) return hostname.slice(0, -9);
+    if (hostname.endsWith(".deth.net")) res = hostname.slice(0, -9);
 
-    return undefined;
+    return res && res.replace(/^www\./, "");
   },
   openRepoOnGithub: () => {
     window.open("https://github.com/dethcrypto/ethereum-code-viewer", "_blank");