Dear Lukasz,
I am able to upload and download and open .txt file but for .pdf and .docx
files, I am able to upload but when I download the pdf file, the file
cannot be opened. For the .docx file when I try to click on the file, on
the console it does show the log successfully download attachment file but
on the frontend an error "System is unable to proceed with your request."
is being displayed.
public class getDotsMissionAction {
public void downloadAttach(){
try {
String filename =
DotsFormUtil.cleanStringFile(request.getParameter("filename"));t
String realname =
DotsFormUtil.cleanStringFile(request.getParameter("name"));
HttpSession session = (HttpSession) request.getSession();
String strDotsIdToken = (String)
session.getAttribute("strDotsIdToken");
try{
if(strDotsIdToken == null ||
!strDotsIdToken.equals(filename.split("_")[0]))
logger.error("strDotsIdToken is null or
strDotsIdToken is not equal and Exception is thrown");
}catch (Exception e){
logger.info(e);
}
try {
if(filename!= null){
try {
ResourceBundle bundle =
ResourceBundle.getBundle("resources.dotsDisplay");
String
strDirectory=DotsFormUtil.cleanpString(bundle.getString("dots.attachments.path"));
File f= new
File(FilenameUtils.normalize(DotsFormUtil.cleanString(strDirectory+File.separator
+ filename)));
String pattern =
"[a-zA-Z0-9]{1,50}\\.[a-zA-Z0-9]{1,10}";
if(realname.matches(pattern)){
response.reset();
response.setCharacterEncoding("UTF-8");
response.setContentType("application/pdf");
response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
response.setHeader("Content-Disposition","attachment; fileName="
+realname);
}
try (
OutputStream out2 = response.getOutputStream()){
Files.copy(f,out2);
out2.flush();
}
} catch (FileNotFoundException e){
e.printStackTrace();
logger.error(e.getMessage());
}
}
}catch (FileNotFoundException e){
e.printStackTrace();
logger.error(e.getMessage());
}
logger.info("successfully download attachment file");
}catch (FileNotFoundException e){
e.printStackTrace();
logger.error(e.getMessage());
}
}
public static String cleanStringFile(String- aString){
if(aString==null) return null;
String cleanString = "";
char cleanChar = '\0';
for(int i=0; i<aString.length(); i++){
cleanChar = cleanCharFile(aString.charAt(i));
if(cleanChar != '\0') cleanString+=cleanChar;
}
return cleanString;
}
private static char cleanCharFile(char aChar){
for(int i = 48; i<58; ++i){
if(aChar ==i) return (char) i;
}
for(int i = 65; i<91; ++i){
if(aChar ==i) return (char) i;
}
for(int i = 97; i<123; ++i){
if(aChar ==i) return (char) i;
}
switch (aChar){
case '.':
return '.';
case '_':
return '_';
case '-':
return '-';
case '!':
return '!';
}
return '\0';
}
This is my modified code
public String downloadAttach() {
HttpServletResponse response = ServletActionContext.getResponse();
try {
String filename =
DotsFormUtil.cleanStringFile(request.getParameter("filename"));t
String realname =
DotsFormUtil.cleanStringFile(request.getParameter("name"));
HttpSession session = (HttpSession) request.getSession();
String strDotsIdToken = (String) session.getAttribute("strDotsIdToken");
try{
if(strDotsIdToken == null ||
!strDotsIdToken.equals(filename.split("_")[0]))
logger.error("strDotsIdToken is null or strDotsIdToken
is not equal and Exception is thrown");
}catch (Exception e){
logger.info(e);
}
try {
if (filename != null) {
ResourceBundle bundle =
ResourceBundle.getBundle("resources.dotsDisplay");
String strDirectory =
DotsFormUtil.cleanString(bundle.getString("dots.attachments.path"));
File f = new File(strDirectory + File.separator + filename);
String pattern = "[a-zA-Z0-9]{1,50}\\.[a-zA-Z0-9]{1,10}";
if (realname.matches(pattern)) {
response.reset();
response.setCharacterEncoding("UTF-8");
String contentType;
if (realname.toLowerCase().endsWith(".pdf")) {
contentType = "application/pdf";
} else if (realname.toLowerCase().endsWith(".docx")) {
contentType =
"application/vnd.openxmlformats-officedocument.wordprocessingml.document";
} else {
contentType = "application/octet-stream";
}
response.setContentType(contentType);
response.setHeader("Content-Disposition", "attachment;
filename=" + realname);
try (FileInputStream fis = new FileInputStream(f);
OutputStream out2 = response.getOutputStream()) {
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = fis.read(buffer)) != -1) {
out2.write(buffer, 0, bytesRead);
}
}
} else {
// Handle invalid filename pattern
// For example: Log an error, return a response
indicating invalid file, etc.
}
}
} catch (IOException e) {
e.printStackTrace();
return "error"; // Return the result name for error handling
}
return null; // To avoid Struts2 result processing
}
However I am still not able to download and view .pdf and .docx file.
Kindly assist. Thank you.
Regards
Mahabir
