refactor: Add HTTP headers to API requests.

- Add headers to the fetch and refresh access token functions
- Allow for optional headers in request data interface
- Fix syntax error in headers object_literals in request method
- Use default configuration instead of creating a new object in request method

src/net/NetClient.ts

@@ -3,6 +3,7 @@ export interface IReqData {
   url: string
   method?: string
   data?: any
+  headers?: any
 }
 export class NetClient {
   httpGet(reqData: IReqData | string): Promise<any> {
@@ -25,7 +26,7 @@ export class NetClient {
   async request(data: AxiosRequestConfig): Promise<any> {
     let defaultCfg: AxiosRequestConfig = {
       method: 'get',
-      headers: {'Content-Type': 'application/json'}
+      headers: { 'Content-Type': 'application/json' },
     }
     Object.assign(defaultCfg, data)
     console.log(defaultCfg)

src/service/tiktok.svr.ts

@@ -18,6 +18,7 @@ export function fetchAccessToken(code: string) {
   return new NetClient().httpPost({
     url: url_access_token,
     method: 'post',
+    headers: { 'Content-Type': 'text/html;' },
   })
 }
 
@@ -29,5 +30,6 @@ export function refreshAccessToken(refresh_token: string) {
   return new NetClient().httpPost({
     url: url_refresh_token,
     method: 'post',
+    headers: { 'Content-Type': 'text/html;' },
   })
 }