Add debug logging to Axios requests

src/BaseCommand.ts

@@ -3,6 +3,7 @@ import { MittwaldAPIV2Client } from "@mittwald/api-client";
 import { configureAxiosRetry } from "./lib/api_retry.js";
 import { configureConsistencyHandling } from "./lib/api_consistency.js";
 import { getTokenFilename, readApiToken } from "./lib/auth/token.js";
+import { configureAxiosLogging } from "./lib/api_logging.js";
 
 export abstract class BaseCommand extends Command {
   protected authenticationRequired = true;
@@ -23,6 +24,7 @@ export abstract class BaseCommand extends Command {
       this.apiClient.axios.defaults.headers["User-Agent"] =
         `mittwald-cli/${this.config.version}`;
 
+      configureAxiosLogging(this.apiClient.axios);
       configureAxiosRetry(this.apiClient.axios);
       configureConsistencyHandling(this.apiClient.axios);
     }

src/lib/api_logging.ts

@@ -0,0 +1,35 @@
+import debug from "debug";
+import { AxiosInstance } from "@mittwald/api-client-commons";
+
+/**
+ * Configure logging for Axios requests and responses using the `debug` module.
+ *
+ * Run the CLI with `DEBUG=mw:api:client:*` to see the logs. Keep in mind that
+ * this will also log sensitive information in request bodies or headers.
+ */
+export function configureAxiosLogging(axios: AxiosInstance) {
+  const baseDebugger = debug("mw:api:client");
+  const reqDebugger = baseDebugger.extend("request");
+  const resDebugger = baseDebugger.extend("response");
+
+  axios.interceptors.request.use((config) => {
+    reqDebugger(
+      "%s %s requested with %O",
+      config.method?.toUpperCase(),
+      config.url,
+      config.data,
+    );
+    return config;
+  });
+
+  axios.interceptors.response.use((response) => {
+    resDebugger(
+      "%s %s responded with %o %O",
+      response.config.method?.toUpperCase(),
+      response.config.url,
+      response.status + " " + response.statusText,
+      response.data,
+    );
+    return response;
+  });
+}