If it doesn't receive it, it returns an HTTP 401 "Unauthorized" error.

And returns a header `WWW-Authenticate` with a value of `Basic`, and an optional `realm` parameter.

That tells the browser to show the integrated prompt for a username and password.

Then, when you type that username and password, the browser sends them in the header automatically.

## Simple HTTP Basic Auth

	flag.StringVar(&token, "t", "", "Token to use with AssumeRoleWithCustomToken STS API (required)")
	flag.StringVar(&roleArn, "r", "", "RoleARN to use with the request (required)")
	flag.BoolVar(&displayCreds, "d", false, "Only show generated credentials")
	flag.DurationVar(&expiryDuration, "e", 0, "Request a duration of validity for the generated credential")
	flag.StringVar(&bucketToList, "b", "mybucket", "Bucket to list (defaults to mybucket)")
}

= element\n  }\n\n  // Public\n\n  toggleSubmenu() {\n    this._element.siblings().show().toggleClass('show')\n\n    if (!this._element.next().hasClass('show')) {\n      this._element.parents(SELECTOR_DROPDOWN_MENU).first().find('.show').removeClass('show').hide()\n    }\n\n    this._element.parents('li.nav-item.dropdown.show').on('hidden.bs.dropdown', () => {\n      $('.dropdown-submenu .show').removeClass('show').hide()\n    })\n  }\n\n  fixPosition() {\n    const $element = $(SELECTOR_DROPDOWN_MENU_ACTIVE)\n\n...

But I'll show you how to improve that next. 🤓

## Custom Operation IDs and Better Method Names

You can **modify** the way these operation IDs are **generated** to make them simpler and have **simpler method names** in the clients.

                               aria-controls="listSearchForm"><i class="fas fa-search" aria-hidden="true"></i></a>
                            <div class="collapse <c:if test="${!empty regex || !empty replacement}">show</c:if>" id="listSearchForm">
                                <la:form action="/admin/pathmap/">
                                    <div class="form-group row">

    FilenameFilter filter = new PatternFilenameFilter("a+");
    assertTrue(filter.accept(dir, "a"));
    assertTrue(filter.accept(dir, "aaaa"));
    assertFalse(filter.accept(dir, "b"));

    // Show that dir is ignored
    assertTrue(filter.accept(null, "a"));
  }

  public void testNulls() throws Exception {
    NullPointerTester tester = new NullPointerTester();

    `show w'. This is free software, and you are welcome to redistribute
    it under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the
appropriate parts of the General Public License. Of course, the commands
you use may be called something other than `show w' and `show c'; they

{!../../docs_src/templates/templates/item.html!}
```

### Template Context Values

In the HTML that contains:

{% raw %}

```jinja
Item ID: {{ id }}
```

{% endraw %}

...it will show the `id` taken from the "context" `dict` you passed:

```Python
{"id": id}
```

For example, with an ID of `42`, this would render:

```html
Item ID: 42
```

### Template `url_for` Arguments

 *     .url("http://publicobject.com/helloworld.txt")
 *     .build();
 * ```
 *
 * ## Force a Cache Response
 *
 * Sometimes you'll want to show resources if they are available immediately, but not otherwise.
 * This can be used so your application can show *something* while waiting for the latest data to be
 * downloaded. To restrict a request to locally-cached resources, add the `only-if-cached`
 * directive:
 *

    // ----------------------------------------------------------------------
    //
    // p1 inherits from p0
    // p0 inherits from super model
    //
    // or we can show it graphically as:
    //
    // p1 ---> p0 --> super model
    //
    // ----------------------------------------------------------------------

    @Test