Package com.evolveum.midpoint.web.component.input.validator

Class FileValidatorUtil

java.lang.Object

com.evolveum.midpoint.web.component.input.validator.FileValidatorUtil

public final class FileValidatorUtil
extends Object

Contains utility methods for validating uploaded file content. Validation compares the content type detected from the file bytes with both the declared content type and the configured allowed MIME types.

Author:

matisovaa

Constructor Summary

Constructors

Constructor	Description
FileValidatorUtil()

Method Summary

Modifier and Type	Method	Description
static String	detectContentType(byte[] bytes)	Detects the MIME type of uploaded content from its bytes.
static void	validateUploadContent(byte[] bytes, String declaredContentType, List<String> allowedContentTypes)	Validates uploaded file content against its declared content type and the configured allowed MIME types.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FileValidatorUtil

public FileValidatorUtil()

Method Details

validateUploadContent

public static void validateUploadContent(byte[] bytes,
 String declaredContentType,
 List<String> allowedContentTypes)
                                  throws FileUploadContentValidationException

Validates uploaded file content against its declared content type and the configured allowed MIME types. The actual content type is detected from the file bytes. Configured allowed types support MIME wildcards, for example image/*.

Parameters:

bytes - uploaded file content

declaredContentType - content type declared by the upload request; may be null or blank

allowedContentTypes - MIME types allowed by the effective upload policy

Throws:

FileUploadContentValidationException - if the content type cannot be recognized, a MIME type is malformed, the detected type is not allowed, or the declared type does not match the detected type

detectContentType

public static String detectContentType(byte[] bytes)

Detects the MIME type of uploaded content from its bytes. The method uses Apache Tika detection without relying on a file name. Container detectors identify Office and OpenDocument formats precisely (e.g. docx, xlsx, doc, xls, odt, ods) in addition to magic-byte detection.

Parameters:

bytes - uploaded file content

Returns:

detected MIME type, or null if the content type is not recognized