如何将文件内容传递给swagger@ExampleProperty注释值？

Question

我正在使用Swagger3.0.0-Snapshot为我的Spring Boot应用程序创建文档。我的maven依赖项是

<dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>3.0.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>3.0.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-spring-webmvc</artifactId>
            <version>3.0.0-SNAPSHOT</version>
        </dependency>

我的swagger配置类尽可能简单：

@Configuration
@EnableSwagger2WebMvc
public class SwaggerConfig {
    @Bean
    public Docket api() {
return new Docket(DocumentationType.SWAGGER_2)
                .useDefaultResponseMessages(false)
                .select()
         .apis(RequestHandlerSelectors.basePackage("com.mycompany.cs"))
                .paths(PathSelectors.any())
                .build()
                .pathMapping("/")
                .useDefaultResponseMessages(false);
    }

而我的controller方法有以下注释：

@ApiOperation(value = "Hello world", httpMethod = "POST")
    @ApiResponses(value = {
            @ApiResponse(code = 200, message = "OK",
                    examples = @Example(value = @ExampleProperty(mediaType = "application/json",
                            value = exampleValue)))
    })

json文件的内容必须显示在Swagger UI的示例字段中。

Answer 1

好消息是，Swagger正在使用Spring，并且有可能使用DI的力量。

例如，您希望向ServiceModelToSwagger2MapperImpl添加新功能。创建扩展它的自己的组件并将其标记为主组件。Spring将自动生成ServiceModelToSwagger2Mapper抽象类的实现。

@Component
@Primary
@Slf4j
public class ServiceModelToSwagger2MapperExtensionImpl extends ServiceModelToSwagger2MapperImpl {

例如,您希望它读取文件的内容并将其放入示例字段：

@Override
protected Map<String, Response> mapResponseMessages(Set<ResponseMessage> from) {
    Map<String, Response> responses = super.mapResponseMessages(from);
    responses.forEach((key, response)-> {
        Map<String, Object> examples = response.getExamples();
        examples.entrySet().forEach(example -> {
            Object exampleObject = example.getValue();
            if (exampleObject instanceof String) {
                String exampleValue = (String) exampleObject;
                if (exampleValue.startsWith("file:")) {
                    String fileContent = readFileContent(exampleValue);
                    example.setValue(fileContent);
                }
            }});
    });

    return responses;
}

private String readFileContent(String example) {
    String fileContent = "";
    try {
        String fileName = example.replace("file:", "");
        File resource = new ClassPathResource(fileName).getFile();
        if(resource.exists()) {
            fileContent
                    = new String(Files.readAllBytes(resource.toPath()));
        }
    } catch (
            IOException e) {
        log.error("Cannot read swagger documentation from file {}", example);
    }
    return fileContent;
}

@ApiResponses(value = {
        @ApiResponse(code = 200, message = "OK",
                examples = @Example(value = @ExampleProperty(mediaType = "application/vnd.siren+json",
                        value = "file:/data/controller-responses/reponse.json")))
})