我正在尝试上传 GraphQL 突变和图像作为应用程序/表单数据。 GraphQL 部分正在运行,但我想“保存”上传的二进制文件并将路径添加到 GraphQL 数据。在 createGraphQLContext 中,我可以访问 HttpServletRequest,但(多)部分是空的。 我用 graphql-spring-boot-starter带有嵌入式 tomcat 8.5 和提供的 GraphQL Java Tools
这是我对/graphql 的 Relay Modern 调用
------WebKitFormBoundaryWBzwQyVX0TvBTIBD
Content-Disposition: form-data; name="query"
mutation CreateProjectMutation(
$input: ProjectInput!
) {
createProject(input: $input) {
id
name
}
}
------WebKitFormBoundaryWBzwQyVX0TvBTIBD
Content-Disposition: form-data; name="variables"
{"input":{"name":"sdasas"}}
------WebKitFormBoundaryWBzwQyVX0TvBTIBD
Content-Disposition: form-data; name="file"; filename="51zvT5zy44L._SL500_AC_SS350_.jpg"
Content-Type: image/jpeg
------WebKitFormBoundaryWBzwQyVX0TvBTIBD--
在我的@Component
public class MyGraphQLContextBuilder implements GraphQLContextBuilder
我可以访问 HttpServletRequest
并希望使用 req.getPart( "file")
但是我在请求中的部分是空的 intellij debugger
我已将其添加到我的 application.yml
spring:
http:
multipart:
enabled: true
file-size-threshold: 10MB
location: /tmp
max-file-size: 10MB
max-request-size: 15MB
resolve-lazily: false
并尝试了不同的@configuration 来启用多部分配置,但部分仍然是空的。
@Configuration
public class MultipartConfig {
@Bean
public MultipartResolver multipartResolver() {
StandardServletMultipartResolver resolver = new StandardServletMultipartResolver();
return resolver;
}
}
import javax.servlet.MultipartConfigElement;
import javax.servlet.ServletRegistration.Dynamic;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
public class MyInitializer
extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class[] {};
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class[] { MultipartConfig.class };
}
@Override
protected String[] getServletMappings() {
return new String[] { "/graphql" };
}
@Override
protected void customizeRegistration(Dynamic registration) {
//Parameters:-
// location - the directory location where files will be stored
// maxFileSize - the maximum size allowed for uploaded files
// maxRequestSize - the maximum size allowed for multipart/form-data requests
// fileSizeThreshold - the size threshold after which files will be written to disk
MultipartConfigElement multipartConfig = new MultipartConfigElement("/tmp", 1048576,
10485760, 0);
registration.setMultipartConfig(multipartConfig);
}
}
我不知道该怎么办。希望有人能帮助我。
谢谢。
最佳答案
Spring boot 的嵌入式 Tomcat 默认支持 Servlet 3.x multipart。 GraphQL java servlet 支持 commons FileUpload。要使事情正常进行,您必须禁用 Spring 引导默认的多部分配置,例如:
在pom.xml中添加commons-fileupload的maven依赖
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
应用程序.yml
spring:
servlet:
multipart:
enabled: false
Spring Boot 应用类
@EnableAutoConfiguration(exclude={MultipartAutoConfiguration.class})
然后在你的@Configuration 中添加一个@Bean
@Bean(name = "multipartResolver")
public CommonsMultipartResolver multipartResolver() {
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
multipartResolver.setMaxUploadSize(100000);
return multipartResolver;
}
现在您可以在 GraphQL 上下文中找到上传的多部分文件,因为它们会自动映射到:
environment -> context -> files
可从DataFetchingEnvironment访问
以及变异的实现示例:
@Component
public class Mutation implements GraphQLMutationResolver {
@Autowired
private TokenService tokenService;
@Autowired
private UserRepository userRepository;
@Autowired
private UserService userService;
@Autowired
private ProjectRepository repository;
@Autowired
@Qualifier( value = "modeshape" )
private StorageService storageService;
@GraphQLField @GraphQLRelayMutation
public ProjectItem createProject( CreateProjectInput input, DataFetchingEnvironment environment ) {
Project project = new Project( input.getName() );
project.setDescription( input.getDescription() );
GraphQLContext context = environment.getContext();
Optional<Map<String, List<FileItem>>> files = context.getFiles();
files.ifPresent( keys -> {
List<FileItem> file = keys.get( "file" );
List<StorageService.FileInfo> storedFiles = file.stream().map( f -> storageService.store( f, "files", true ) ).collect( Collectors.toList() );
project.setFile( storedFiles.get( 0 ).getUuid() );
} );
repository.save( project );
return new ProjectItem( project );
}
class CreateProjectInput {
private String name;
private String description;
private String clientMutationId;
@GraphQLField
public String getName() {
return name;
}
public String getDescription() {
return description;
}
public void setDescription( String description ) {
this.description = description;
}
@GraphQLField
public String getClientMutationId() {
return clientMutationId;
}
}
关于java - graphql-spring-boot 上传二进制文件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48050509/