/**
* Cleanup the Spring MultipartFiles created during multipart parsing, potentially holding
* temporary data on disk.
*
* <p>Deletes the underlying Commons FileItem instances.
*
* @param multipartFiles Collection of MultipartFile instances
* @see org.apache.commons.fileupload.FileItem#delete()
*/
protected void cleanupFileItems(MultiValueMap<String, MultipartFile> multipartFiles) {
for (List<MultipartFile> files : multipartFiles.values()) {
for (MultipartFile file : files) {
if (file instanceof CommonsMultipartFile) {
CommonsMultipartFile cmf = (CommonsMultipartFile) file;
cmf.getFileItem().delete();
if (logger.isDebugEnabled()) {
logger.debug(
"Cleaning up multipart file ["
+ cmf.getName()
+ "] with original filename ["
+ cmf.getOriginalFilename()
+ "], stored "
+ cmf.getStorageDescription());
}
}
}
}
}
/**
* Parse the given List of Commons FileItems into a Spring MultipartParsingResult, containing
* Spring MultipartFile instances and a Map of multipart parameter.
*
* @param fileItems the Commons FileIterms to parse
* @param encoding the encoding to use for form fields
* @return the Spring MultipartParsingResult
* @see CommonsMultipartFile#CommonsMultipartFile(org.apache.commons.fileupload.FileItem)
*/
protected MultipartParsingResult parseFileItems(List<FileItem> fileItems, String encoding) {
MultiValueMap<String, MultipartFile> multipartFiles =
new LinkedMultiValueMap<String, MultipartFile>();
Map<String, String[]> multipartParameters = new HashMap<String, String[]>();
Map<String, String> multipartParameterContentTypes = new HashMap<String, String>();
// Extract multipart files and multipart parameters.
for (FileItem fileItem : fileItems) {
if (fileItem.isFormField()) {
String value;
String partEncoding = determineEncoding(fileItem.getContentType(), encoding);
if (partEncoding != null) {
try {
value = fileItem.getString(partEncoding);
} catch (UnsupportedEncodingException ex) {
if (logger.isWarnEnabled()) {
logger.warn(
"Could not decode multipart item '"
+ fileItem.getFieldName()
+ "' with encoding '"
+ partEncoding
+ "': using platform default");
}
value = fileItem.getString();
}
} else {
value = fileItem.getString();
}
String[] curParam = multipartParameters.get(fileItem.getFieldName());
if (curParam == null) {
// simple form field
multipartParameters.put(fileItem.getFieldName(), new String[] {value});
} else {
// array of simple form fields
String[] newParam = StringUtils.addStringToArray(curParam, value);
multipartParameters.put(fileItem.getFieldName(), newParam);
}
multipartParameterContentTypes.put(fileItem.getFieldName(), fileItem.getContentType());
} else {
// multipart file field
CommonsMultipartFile file = new CommonsMultipartFile(fileItem);
multipartFiles.add(file.getName(), file);
if (logger.isDebugEnabled()) {
logger.debug(
"Found multipart file ["
+ file.getName()
+ "] of size "
+ file.getSize()
+ " bytes with original filename ["
+ file.getOriginalFilename()
+ "], stored "
+ file.getStorageDescription());
}
}
}
return new MultipartParsingResult(
multipartFiles, multipartParameters, multipartParameterContentTypes);
}
