[BUG] Headers don't return

[BUG] Headers don't return

Hello everyone,
I got an issue with the openAPI generator for rust. Specifically with headers in the generator.

When I call this command on the file api.json, it does generate the files it should generate, but there is a problem with the headers from my login function.

Description

The return should also give the header.

openapi-generator version

6.2.0

Generation Details

Command

openapi-generator-cli generate -i api.json -g rust -o file_system_cli/file_system_lib 

Login function in api.json:

"/api/v1/organisations/login": {
      "post": {
        "tags": [
          "Organisations"
        ],
        "operationId": "login",
        "requestBody": {
          "description": "",
          "content": {
            "application/x-www-form-urlencoded": {
              "schema": {
                "$ref": "#/components/schemas/EmailAndPassword"
              }
            }
          },
          "required": true
        },
        "responses": {
          "200": {
            "description": "Successfully authenticated. The session ID is returned in a cookie named `id`. You need to include this cookie in subsequent requests.",
            "headers": {
              "Set-Cookie": {
                "schema": {
                  "type": "string"
                },
                "description": "Session cookie"
              }
            },
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "message": {
                      "type": "string",
                      "description": "Success message"
                    },
                    "sessionId": {
                      "type": "string",
                      "description": "Session ID"
                    },
                    "Set-Cookie": {
                      "type": "string",
                      "description": "Session cookie"
                    }
                  }
                }
              }
            }
          },
          "400": {
            "description": "Something went wrong",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Response"
                }
              }
            }
          }
        }
      }
    },

Generated code

pub async fn login(configuration: &configuration::Configuration, email: &str, password: &str) -> Result<crate::models::Login200Response, Error<LoginError>> {
    let local_var_configuration = configuration;

    let local_var_client = &local_var_configuration.client;

    let local_var_uri_str = format!("{}/api/v1/organisations/login", local_var_configuration.base_path);
    let mut local_var_req_builder = local_var_client.request(reqwest::Method::POST, local_var_uri_str.as_str());

    if let Some(ref local_var_user_agent) = local_var_configuration.user_agent {
        local_var_req_builder = local_var_req_builder.header(reqwest::header::USER_AGENT, local_var_user_agent.clone());
    }
    let mut local_var_form_params = std::collections::HashMap::new();
    local_var_form_params.insert("email", email.to_string());
    local_var_form_params.insert("password", password.to_string());
    local_var_req_builder = local_var_req_builder.form(&local_var_form_params);

    let local_var_req = local_var_req_builder.build()?;
    let local_var_resp = local_var_client.execute(local_var_req).await?;

    let local_var_status = local_var_resp.status();
    let local_var_content = local_var_resp.text().await?;

    if !local_var_status.is_client_error() && !local_var_status.is_server_error() {
        serde_json::from_str(&local_var_content).map_err(Error::from)
    } else {
        let local_var_entity: Option<LoginError> = serde_json::from_str(&local_var_content).ok();
        let local_var_error = ResponseContent { status: local_var_status, content: local_var_content, entity: local_var_entity };
        Err(Error::ResponseError(local_var_error))
    }
}

The problem

The problem is that when I try to get the results from this generated function, it doesn't return the header (which I need for a cookie).

I know I could just change the code up a bit, but everytime I rerun the command I would have to change the code again.

Start with api.json and the generated Rust login function produced by the shown openapi-generator-cli command. Trace how the 200 response is represented and verify that the generated result exposes the Set-Cookie header; done means rerunning generation preserves access to that header without manual edits.