Auto merge of #1912 - kzys:fastboot-install, r=jtgeibel

Make /install work under FastBoot

Will add nginx.conf change after #1907. Early feedback is welcome!

app/routes/crate/docs.js

@@ -3,13 +3,14 @@ import { inject as service } from '@ember/service';
 
 export default Route.extend({
   flashMessages: service(),
+  redirector: service(),
 
   redirect() {
     let crate = this.modelFor('crate');
 
     let documentation = crate.get('documentation');
     if (documentation) {
-      window.location = documentation;
+      this.redirector.redirectTo(documentation);
     } else {
       // Redirect to the crate's main page and show a flash error if
       // no documentation is found

app/routes/crate/repo.js

@@ -3,13 +3,14 @@ import { inject as service } from '@ember/service';
 
 export default Route.extend({
   flashMessages: service(),
+  redirector: service(),
 
   redirect() {
     let crate = this.modelFor('crate');
 
     let repository = crate.get('repository');
     if (repository) {
-      window.location = repository;
+      this.redirector.redirectTo(repository);
     } else {
       // Redirect to the crate's main page and show a flash error if
       // no repository is found

app/routes/install.js

@@ -1,7 +1,10 @@
 import Route from '@ember/routing/route';
+import { inject as service } from '@ember/service';
 
 export default Route.extend({
+  redirector: service(),
+
   redirect() {
-    window.location = 'https://doc.rust-lang.org/cargo/getting-started/installation.html';
+    this.redirector.redirectTo('https://doc.rust-lang.org/cargo/getting-started/installation.html');
   },
 });

app/services/redirector.js

@@ -0,0 +1,15 @@
+import Service, { inject as service } from '@ember/service';
+
+export default Service.extend({
+  fastboot: service(),
+
+  redirectTo(url) {
+    if (this.fastboot.isFastBoot) {
+      let headers = this.fastboot.response.headers;
+      headers.set('location', url);
+      this.set('fastboot.response.statusCode', 301);
+    } else {
+      window.location = url;
+    }
+  },
+});