feat(esp_http_client): Add API to set auth data

This new API can be used to set the authentication data in the client context
when the auth data is received in the custom header

Closes: #12131

components/esp_http_client/esp_http_client.c

@@ -1645,6 +1645,15 @@ esp_http_client_transport_t esp_http_client_get_transport_type(esp_http_client_h
     }
 }
 
+esp_err_t esp_http_client_set_auth_data(esp_http_client_handle_t client, const char *auth_data, int len)
+{
+    if (client == NULL || auth_data == NULL || len <= 0) {
+        return ESP_ERR_INVALID_ARG;
+    }
+    http_utils_append_string(&client->auth_header, auth_data, len);
+    return ESP_OK;
+}
+
 void esp_http_client_add_auth(esp_http_client_handle_t client)
 {
     if (client == NULL) {

components/esp_http_client/include/esp_http_client.h

@@ -600,6 +600,21 @@ esp_http_client_transport_t esp_http_client_get_transport_type(esp_http_client_h
  */
 esp_err_t esp_http_client_set_redirection(esp_http_client_handle_t client);
 
+/**
+ * @brief      On receiving a custom authentication header, this API can be invoked to set the
+ *             authentication information from the header. This API can be called from the event
+ *             handler.
+ *
+ * @param[in]  client       The esp_http_client handle
+ * @param[in]  auth_data    The authentication data received in the header
+ * @param[in]  len          length of auth_data.
+ *
+ * @return
+ *      - ESP_ERR_INVALID_ARG
+ *      - ESP_OK
+ */
+esp_err_t esp_http_client_set_auth_data(esp_http_client_handle_t client, const char *auth_data, int len);
+
 /**
  * @brief      On receiving HTTP Status code 401, this API can be invoked to add authorization
  *             information.