feat: request/response interceptors for remote config fetch (#4484)

src/core/plugins/configs/spec-actions.js

@@ -0,0 +1,34 @@
+import { parseYamlConfig } from "./helpers"
+
+export const downloadConfig = (url) => ({fn: { fetch }, getConfigs}) => {
+  const { requestInterceptor, responseInterceptor } = getConfigs()
+  let req = { url }
+  if(requestInterceptor) {
+    req = requestInterceptor(req)
+  }
+  return fetch(req)
+    .then(res => {
+      if(res) {
+        return responseInterceptor(res)
+      }
+      return res
+    })
+}
+
+export const getConfigByUrl = (configUrl, cb)=> ({ specActions }) => {
+  if (configUrl) {
+    return specActions.downloadConfig(configUrl).then(next, next)
+  }
+
+  function next(res) {
+    if (res instanceof Error || res.status >= 400) {
+      specActions.updateLoadingStatus("failedConfig")
+      specActions.updateLoadingStatus("failedConfig")
+      specActions.updateUrl("")
+      console.error(res.statusText + " " + configUrl)
+      cb(null)
+    } else {
+      cb(parseYamlConfig(res.text))
+    }
+  }
+}