assert data == "Session cookie or query token value is: fakesession"
            data = websocket.receive_text()
            assert data == f"Message text was: {message}, for item ID: foo"
            message = "Message two"
            websocket.send_text(message)
            data = websocket.receive_text()
            assert data == "Session cookie or query token value is: fakesession"

# Header 参数

定义 `Header` 参数的方式与定义 `Query`、`Path`、`Cookie` 参数相同。

## 导入 `Header`

首先，导入 `Header`：

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[3] *}

## 声明 `Header` 参数

然后，使用和 `Path`、`Query`、`Cookie` 一样的结构定义 header 参数。

第一个值是默认值，还可以传递所有验证参数或注释参数：

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[9] *}

/// note | 技术细节

`Header` 是 `Path`、`Query`、`Cookie` 的**兄弟类**，都继承自共用的 `Param` 类。

import jakarta.validation.constraints.Size;

/**
 * The edit form for Related Query.
 * This form extends CreateForm and adds fields necessary for editing existing related query entries.
 */
public class EditForm extends CreateForm {

    /** Unique identifier for the related query entry */
    @Required
    @Size(max = 1000)
    public String id;

    // ===================================================================================
    //                                                                               Query
    //                                                                               =====
    public BsRoleTypeCQ query() {
        assertQueryPurpose();
        return doGetConditionQuery();
    }

    protected BsRoleTypeCQ doGetConditionQuery() {

    // ===================================================================================
    //                                                                               Query
    //                                                                               =====
    public BsClickLogCQ query() {
        assertQueryPurpose();
        return doGetConditionQuery();
    }

    protected BsClickLogCQ doGetConditionQuery() {

import org.opensearch.index.query.RangeQueryBuilder;
import org.opensearch.index.query.RegexpQueryBuilder;
import org.opensearch.index.query.SpanTermQueryBuilder;
import org.opensearch.index.query.TermQueryBuilder;
import org.opensearch.index.query.TermsQueryBuilder;
import org.opensearch.index.query.WildcardQueryBuilder;
import org.opensearch.index.query.functionscore.FunctionScoreQueryBuilder;

</p>
<p align="center">
    Framework FastAPI, alta performance, fácil de aprender, fácil de codar, pronto para produção
</p>
<p align="center">
<a href="https://github.com/fastapi/fastapi/actions?query=workflow%3ATest+event%3Apush+branch%3Amaster" target="_blank">
    <img src="https://github.com/fastapi/fastapi/actions/workflows/test.yml/badge.svg?event=push&branch=master" alt="Test">
</a>

        });

        userBhv.selectCursor(cb -> cb.query().setRoles_Equal(role.getId()), entity -> {
            entity.setRoles(
                    stream(entity.getRoles()).get(stream -> stream.filter(s -> !s.equals(role.getId())).toArray(n -> new String[n])));
            userBhv.insertOrUpdate(entity);
        });
    }

    /**
     * Sets up the list condition for the role query.
     * @param cb The role condition bean.

{"attributes":{"description":"","kibanaSavedObjectMeta":{"searchSourceJSON":"{\"query\":{\"query\":\"\",\"language\":\"kuery\"},\"filter\":[],\"indexRefName\":\"kibanaSavedObjectMeta.searchSourceJSON.index\"}"},"title":"search-query-counts-per-sec","uiStateJSON":"{}","version":1,"visState":"{\"title\":\"search-query-counts-per-sec\",\"type\":\"histogram\",\"params\":{\"type\":\"histogram\",\"grid\":{\"categoryLines\":false},\"categoryAxes\":[{\"...

    // ===================================================================================
    //                                                                               Query
    //                                                                               =====
    public BsBadWordCQ query() {
        assertQueryPurpose();
        return doGetConditionQuery();
    }

    protected BsBadWordCQ doGetConditionQuery() {