Treat HTTP 204 as error (#115)

README.md

@@ -611,6 +611,12 @@ on each platform:
 * [macOS `add-generic-password`](https://www.netmeister.org/blog/keychain-passwords.html)
 * [Windows `cmdkey`](https://www.scriptinglibrary.com/languages/powershell/how-to-manage-secrets-and-passwords-with-credentialmanager-and-powershell/)
 
+## Client Result Code Handling
+
+Both clients (Python and C++) will treat any HTTP response code other than `200` as an error since zserio services are expected to return a parsable response object. The client will throw an exception with a descriptive message if the response code is not `200`.
+
+In case applications want to utilize for example the `204 (No Content)` response code, they have to catch the exception and handle it accordingly.
+
 ## Swagger User Interface 
 
 If you have installed `pip install "connexion[swagger-ui]"`, you can view

libs/zswagcl/src/openapi-client.cpp

@@ -220,7 +220,7 @@ std::string OpenAPIClient::call(const std::string& methodIdent,
     auto result = resultFuture.get();
     httpcl::log().debug("{} Response received (code {}, content length {} bytes).", debugContext, result.status, result.content.size());
 
-    if (result.status >= 200 && result.status < 300) {
+    if (result.status == 200) {
         return std::move(result.content);
     }