Incorporate PR feedback

Author: SleeplessOne1917

src/client.ts

@@ -113,9 +113,9 @@ export class HttpClient {
         logDebug(`isDeepL: ${isDeepL}`);
 
         const axiosRequestConfig: AxiosRequestConfig = {
-            url: isDeepL ? url : undefined,
+            url,
             method,
-            baseURL: isDeepL ? this.serverUrl : url,
+            baseURL: isDeepL ? this.serverUrl : undefined,
             headers,
             responseType: responseAsStream ? 'stream' : 'text',
             timeout: timeoutMs,
@@ -247,19 +247,10 @@ export class HttpClient {
                 }
             }
 
-            let contentType: string | undefined = undefined;
-            if (response.headers.getContentType) {
-                if (typeof response.headers.getContentType === 'string') {
-                    contentType = response.headers.getContentType;
-                } else {
-                    contentType = response.headers.getContentType()?.toString() ?? undefined;
-                }
-            }
-
             return {
                 statusCode: response.status,
                 content: response.data,
-                contentType: contentType,
+                contentType: response.headers['content-type'],
             };
         } catch (axios_error_raw) {
             const axiosError = axios_error_raw as AxiosError;