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add support for apollo file uploads, resolves #61
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...c/main/java/io/leangen/graphql/spqr/spring/autoconfigure/FileUploadAutoConfiguration.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| package io.leangen.graphql.spqr.spring.autoconfigure; | ||
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| import io.leangen.graphql.module.Module; | ||
| import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty; | ||
| import org.springframework.context.annotation.Bean; | ||
| import org.springframework.context.annotation.Configuration; | ||
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| @Configuration | ||
| public class FileUploadAutoConfiguration { | ||
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| @Bean | ||
| @ConditionalOnProperty(name = "graphql.spqr.multipart-upload.enabled", havingValue = "true") | ||
| public Internal<Module> uploadModule() { | ||
| FileUploadHandler uploadAdapter = new FileUploadHandler(); | ||
| return new Internal<>(context -> context.getSchemaGenerator() | ||
| .withArgumentInjectors(uploadAdapter) | ||
| .withTypeMappers(uploadAdapter) | ||
| ); | ||
| } | ||
| } |
88 changes: 88 additions & 0 deletions
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...nfigure/src/main/java/io/leangen/graphql/spqr/spring/autoconfigure/FileUploadHandler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| package io.leangen.graphql.spqr.spring.autoconfigure; | ||
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| import java.lang.reflect.AnnotatedElement; | ||
| import java.lang.reflect.AnnotatedType; | ||
| import java.lang.reflect.Parameter; | ||
| import java.util.*; | ||
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| import graphql.schema.*; | ||
| import io.leangen.geantyref.GenericTypeReflector; | ||
| import io.leangen.graphql.generator.mapping.ArgumentInjector; | ||
| import io.leangen.graphql.generator.mapping.ArgumentInjectorParams; | ||
| import io.leangen.graphql.generator.mapping.TypeMapper; | ||
| import io.leangen.graphql.generator.mapping.TypeMappingEnvironment; | ||
| import io.leangen.graphql.util.ClassUtils; | ||
| import org.springframework.web.multipart.MultipartFile; | ||
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| class FileUploadHandler implements TypeMapper, ArgumentInjector { | ||
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| public static final GraphQLScalarType FILE_UPLOAD_SCALAR = GraphQLScalarType.newScalar() | ||
| .name("FileUpload") | ||
| .description("An apollo upload compatible scalar for multipart uploads") | ||
| .coercing(new Coercing<MultipartFile, Void>() { | ||
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| @Override | ||
| public Void serialize(Object dataFetcherResult) throws CoercingSerializeException { | ||
| throw new CoercingSerializeException("Upload is not a return type"); | ||
| } | ||
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| @Override | ||
| public MultipartFile parseValue(Object input) throws CoercingParseValueException { | ||
| if (input instanceof MultipartFile) { | ||
| return (MultipartFile) input; | ||
| } | ||
| throw new CoercingParseValueException("Expected the input to be parsed by the servlet controller"); | ||
| } | ||
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| @Override | ||
| public MultipartFile parseLiteral(Object input) throws CoercingParseLiteralException { | ||
| throw new CoercingParseLiteralException("Parsing the literal of the upload is not supported"); | ||
| } | ||
| }) | ||
| .build(); | ||
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| @Override | ||
| public GraphQLInputType toGraphQLInputType(AnnotatedType javaType, Set<Class<? extends TypeMapper>> mappersToSkip, TypeMappingEnvironment env) { | ||
| return FILE_UPLOAD_SCALAR; | ||
| } | ||
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| @Override | ||
| public GraphQLOutputType toGraphQLType(AnnotatedType javaType, Set<Class<? extends TypeMapper>> mappersToSkip, TypeMappingEnvironment env) { | ||
| throw new UnsupportedOperationException("FileUpload is not an output type"); | ||
| } | ||
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| @Override | ||
| public boolean supports(AnnotatedElement element, AnnotatedType type) { | ||
| return type != null && ClassUtils.isAssignable(MultipartFile.class, type.getType()); | ||
| } | ||
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| @Override | ||
| public Object getArgumentValue(ArgumentInjectorParams params) { | ||
| if ((params.getInput() instanceof MultipartFile)) { | ||
| return params.getInput(); | ||
| } | ||
| if (!(params.getInput() instanceof Collection)) { | ||
| return null; | ||
| } | ||
| if (ClassUtils.isAssignable(params.getType().getType(), params.getInput().getClass())) { | ||
| return params.getInput(); | ||
| } | ||
| if (ClassUtils.isAssignable(List.class, params.getType().getType())) { | ||
| //noinspection rawtypes,unchecked | ||
| return new ArrayList((Collection) params.getInput()); | ||
| } | ||
| if (ClassUtils.isAssignable(Set.class, params.getType().getType())) { | ||
| //noinspection rawtypes,unchecked | ||
| return new LinkedHashSet((Collection) params.getInput()); | ||
| } | ||
| throw new UnsupportedOperationException("Cannot convert " + params.getInput().getClass() + " to " + params.getType()); | ||
| } | ||
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| @Override | ||
| public boolean supports(AnnotatedType type, Parameter parameter) { | ||
| return supports(null, type) | ||
| || ClassUtils.isAssignable(Iterable.class, type.getType()) | ||
| && supports(null, GenericTypeReflector.getTypeParameter(type, Iterable.class.getTypeParameters()[0])); | ||
| } | ||
| } | ||
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