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| 去中心化注册发现 |
| </span> |
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| </label> |
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| <a href="../edge/by-servicecomb-sdk.html" class="md-nav__link"> |
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| 使用 Edge Service 做网关 |
| </span> |
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| <a href="../edge/zuul.html" class="md-nav__link"> |
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| <span class="md-ellipsis"> |
| 使用 `zuul` 和 `spring cloud gateway` 做网关 |
| </span> |
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| <a href="../edge/nginx.html" class="md-nav__link"> |
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| nginx 网关简单介绍 |
| </span> |
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| 安全特性参考 |
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| <span class="md-nav__icon md-icon"></span> |
| </label> |
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| <label class="md-nav__title" for="__nav_16"> |
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| 安全特性参考 |
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| 使用RSA认证 |
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| 常见问题 |
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| <div class="md-sidebar__scrollwrap"> |
| <div class="md-sidebar__inner"> |
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| Table of contents |
| </label> |
| <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix> |
| |
| <li class="md-nav__item"> |
| <a href="#_1" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| 场景描述 |
| </span> |
| </a> |
| |
| </li> |
| |
| <li class="md-nav__item"> |
| <a href="#_2" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| 配置说明 |
| </span> |
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| |
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| <a href="#_3" class="md-nav__link"> |
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| 示例代码 |
| </span> |
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| |
| <li class="md-nav__item"> |
| <a href="#_4" class="md-nav__link"> |
| <span class="md-ellipsis"> |
| 自定义返回异常 |
| </span> |
| </a> |
| |
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| |
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| |
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| </div> |
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| </div> |
| |
| |
| |
| <div class="md-content" data-md-component="content"> |
| <article class="md-content__inner md-typeset"> |
| |
| |
| |
| |
| <h1>参数效验</h1> |
| |
| <h2 id="_1">场景描述</h2> |
| <p>用户在provider端使用参数效验,可以对相应的参数输入要求预先进行设置,在接口实际调用前进行效验处理,达到控制参数输入标准的效果。</p> |
| <h2 id="_2">配置说明</h2> |
| <ul> |
| <li> |
| <p>添加swagger-invocation-validator的pom依赖:</p> |
| <pre><code>```xml |
| <dependency> |
| <groupId>org.apache.servicecomb</groupId> |
| <artifactId>swagger-invocation-validator</artifactId> |
| </dependency> |
| ``` |
| </code></pre> |
| </li> |
| <li> |
| <p>在需要验证的代码上按照JSR 349规范添加验证器注解,如@NotNull,@Min,@Max等。</p> |
| </li> |
| </ul> |
| <h2 id="_3">示例代码</h2> |
| <ul> |
| <li>接口参数验证</li> |
| </ul> |
| <pre><code class="language-java">@RestSchema(schemaId = "validator") |
| @Path("/validator") |
| @Produces(MediaType.APPLICATION_JSON) |
| public class Validator { |
| |
| @Path("/add") |
| @POST |
| public int add(@FormParam("a") int a, @Min(20) @FormParam("b") int b) { |
| return a + b; |
| } |
| |
| @Path("/sayhi/{name}") |
| @PUT |
| public String sayHi(@Length(min = 3) @PathParam("name") String name) { |
| ContextUtils.getInvocationContext().setStatus(202); |
| return name + " sayhi"; |
| } |
| |
| @Path("/sayhello") |
| @POST |
| public Student sayHello(@Valid Student student) { |
| student.setName("hello " + student.getName()); |
| student.setAge(student.getAge()); |
| return student; |
| } |
| } |
| </code></pre> |
| <ul> |
| <li>bean类验证</li> |
| </ul> |
| <p>需要在传入的Student对象前加@Valid,如上图sayHello(@Valid Student student)方法。</p> |
| <pre><code class="language-java">public class Student { |
| @NotNull |
| private String name; |
| |
| @Max(20) |
| private int age; |
| |
| public void setName(String name) { |
| this.name = name; |
| } |
| |
| public String getName() { |
| return this.name; |
| } |
| |
| public void setAge(int age) { |
| this.age = age; |
| } |
| |
| public int getAge() { |
| return age; |
| } |
| } |
| </code></pre> |
| <h2 id="_4">自定义返回异常</h2> |
| <ul> |
| <li>默认的参数效验器ParameterValidator已经实现了接口ProducerInvokeExtension,按照JSR 349规范处理所需的参数验证。</li> |
| </ul> |
| <p>如果任何参数验证失败,缺省错误是BAD_REQUEST(400, "Bad Request")。</p> |
| <p>返回错误支持自定义扩展,使用SPI机制。</p> |
| <ul> |
| <li> |
| <p>可以通过实现接口ExceptionToProducerResponseConverter来自定义返回的错误信息,以ConstraintViolationExceptionToProducerResponseConverter为例。</p> |
| </li> |
| <li> |
| <p>实现ExceptionToProducerResponseConverter接口,重写方法,其中getOrder方法的返回结果表示该验证器的优先级,值越小优先级越高。</p> |
| <p>```java |
| public class ConstraintViolationExceptionToProducerResponseConverter |
| implements ExceptionToProducerResponseConverter<ConstraintViolationException> { |
| @Override |
| public Class<ConstraintViolationException> getExceptionClass() { |
| return ConstraintViolationException.class; |
| }</p> |
| <p>@Override |
| public Response convert(SwaggerInvocation swaggerInvocation, ConstraintViolationException e) { |
| return Response.createFail(new InvocationException(Status.BAD_REQUEST, e.getConstraintViolations().toString())); |
| }</p> |
| <p>@Override |
| public int getOrder() { |
| return -100; |
| } |
| } |
| ```</p> |
| </li> |
| <li> |
| <p>在META-INF下的services文件夹增加一个文件,以所实现接口x.x.x.ExceptionToProducerResponseConverter(带包名)为名,以具体实现类x.x.x.ConstraintViolationExceptionToProducerResponseConverter(带包名)为内容。</p> |
| </li> |
| </ul> |
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