public String intercept(ActionInvocation invocation) throws Exception {
ActionContext ac = invocation.getInvocationContext();
HttpServletRequest request = (HttpServletRequest) ac.get(ServletActionContext.HTTP_REQUEST);
if (!(request instanceof MultiPartRequestWrapper)) {
if (LOG.isDebugEnabled()) {
ActionProxy proxy = invocation.getProxy();
LOG.debug(
getTextMessage(
"struts.messages.bypass.request",
new String[] {proxy.getNamespace(), proxy.getActionName()}));
}
return invocation.invoke();
}
ValidationAware validation = null;
Object action = invocation.getAction();
if (action instanceof ValidationAware) {
validation = (ValidationAware) action;
}
MultiPartRequestWrapper multiWrapper = (MultiPartRequestWrapper) request;
if (multiWrapper.hasErrors()) {
for (String error : multiWrapper.getErrors()) {
if (validation != null) {
validation.addActionError(error);
}
if (LOG.isWarnEnabled()) {
LOG.warn(error);
}
}
}
// bind allowed Files
Enumeration fileParameterNames = multiWrapper.getFileParameterNames();
while (fileParameterNames != null && fileParameterNames.hasMoreElements()) {
// get the value of this input tag
String inputName = (String) fileParameterNames.nextElement();
// get the content type
String[] contentType = multiWrapper.getContentTypes(inputName);
if (isNonEmpty(contentType)) {
// get the name of the file from the input tag
String[] fileName = multiWrapper.getFileNames(inputName);
if (isNonEmpty(fileName)) {
// get a File object for the uploaded File
File[] files = multiWrapper.getFiles(inputName);
if (files != null && files.length > 0) {
List<File> acceptedFiles = new ArrayList<File>(files.length);
List<String> acceptedContentTypes = new ArrayList<String>(files.length);
List<String> acceptedFileNames = new ArrayList<String>(files.length);
String contentTypeName = inputName + "ContentType";
String fileNameName = inputName + "FileName";
for (int index = 0; index < files.length; index++) {
if (acceptFile(
action,
files[index],
fileName[index],
contentType[index],
inputName,
validation)) {
acceptedFiles.add(files[index]);
acceptedContentTypes.add(contentType[index]);
acceptedFileNames.add(fileName[index]);
}
}
if (!acceptedFiles.isEmpty()) {
Map<String, Object> params = ac.getParameters();
params.put(inputName, acceptedFiles.toArray(new File[acceptedFiles.size()]));
params.put(
contentTypeName,
acceptedContentTypes.toArray(new String[acceptedContentTypes.size()]));
params.put(
fileNameName, acceptedFileNames.toArray(new String[acceptedFileNames.size()]));
}
}
} else {
if (LOG.isWarnEnabled()) {
LOG.warn(
getTextMessage(action, "struts.messages.invalid.file", new String[] {inputName}));
}
}
} else {
if (LOG.isWarnEnabled()) {
LOG.warn(
getTextMessage(
action, "struts.messages.invalid.content.type", new String[] {inputName}));
}
}
}
// invoke action
return invocation.invoke();
}
