Fixing slack import. (#2819)

webapp/client/client.jsx

@@ -348,10 +348,9 @@ export default class Client {
 
     importSlack = (fileData, success, error) => {
         request.
-            post(`${this.getTeamsRoute()}/import_team`).
+            post(`${this.getTeamNeededRoute()}/import_team`).
             set(this.defaultHeaders).
-            type('application/json').
-            accept('application/json').
+            accept('application/octet-stream').
             send(fileData).
             end(this.handleResponse.bind(this, 'importSlack', success, error));
     }

webapp/components/team_import_tab.jsx

@@ -33,8 +33,8 @@ class TeamImportTab extends React.Component {
         this.setState({status: 'fail', link: ''});
     }
 
-    onImportSuccess(data) {
-        this.setState({status: 'done', link: 'data:application/octet-stream;charset=utf-8,' + encodeURIComponent(data)});
+    onImportSuccess(data, res) {
+        this.setState({status: 'done', link: 'data:application/octet-stream;charset=utf-8,' + encodeURIComponent(res.text)});
     }
 
     doImportSlack(file) {
@@ -167,4 +167,4 @@ TeamImportTab.propTypes = {
     intl: intlShape.isRequired
 };
 
-export default injectIntl(TeamImportTab);
+export default injectIntl(TeamImportTab);