## Design

Then I spent some time designing the developer "API" I wanted to have as a user (as a developer using FastAPI).

I tested several ideas in the most popular Python editors: PyCharm, VS Code, Jedi based editors.

By the last <a href="https://www.jetbrains.com/research/python-developers-survey-2018/#development-tools" class="external-link" target="_blank">Python Developer Survey</a>, that covers about 80% of the users.

TFCI_MACOS_CROSS_COMPILE_ENABLE=1
TFCI_MACOS_CROSS_COMPILE_SDK_DEST="tensorflow/tools/toolchains/cross_compile/cc/MacOSX.sdk"
TFCI_MACOS_CROSS_COMPILE_SDK_SOURCE="/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk"

    </mailingList>
  </mailingLists>
  <developers>
    <developer>
      <id>michal</id>
      <name>Michal Maczka</name>
      <email>******@****.***</email>
      <organization>Codehaus</organization>
      <roles>
        <role>Developer</role>
      </roles>
    </developer>
  </developers>
  <scm>

        System.out.println();
        System.out.println(
                "Parent SCM developer connection is: " + project0.getScm().getDeveloperConnection());
        System.out.println(
                "Child SCM developer connection is: " + project1.getScm().getDeveloperConnection());

        assertEquals(project1.getScm().getUrl(), project0.getScm().getUrl() + "/modules/p1");

         * it will be reported as "external". It is up to developer to correctly interpret output (GAV) of issues
         * and realize that in this case he wears two hats:" "user" and "(plugin) developer".
         */
        EXTERNAL
    }

    /**
     * Reports plugin issues applicable to the plugin as a whole.
     * <p>

Once the **patch** is successfully applied, developer must run tests to validate the fix that was backported by running following tests, locally.

    """
    Create an invoice.

    This will (let's imagine) let the API user (some external developer) create an
    invoice.

    And this path operation will:

    * Send the invoice to the client.
    * Collect the money from the client.
    * Send a notification back to the API user (the external developer), as a callback.
        * At this point is that the API will somehow send a POST request to the

    And as the `Response` can be used frequently to set headers and cookies, **FastAPI** also provides it at `fastapi.Response`.

## Custom Headers

# CORS (Cross-Origin Resource Sharing)

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">Понятие CORS или "Cross-Origin Resource Sharing"</a> относится к ситуациям, при которых запущенный в браузере фронтенд содержит JavaScript-код, который взаимодействует с бэкендом, находящимся на другом "источнике" ("origin").

## Источник

!!! note "Technical Details"
    You could also use `from starlette.middleware.cors import CORSMiddleware`.