After upload an image to location dataBaseTest\src\main\resources\static\uploads\ I can't display it on webpage, until application is restarted. I know it's because folder static is loaded only when server is starting, but how can it be solved? I've tried to upload image directly to \dataBaseTest\target\classes\static\uploads\ and it is working fine (loading immedietaly after upload), but it's just not seems to be correct. Also I tried to add
<configuration>
<addResources>true</addResources>
</configuration>
to "pom.xml" but nothing has changed.
I've also tried to use addResourceHandlers but whole folder static seems to stop working.
I'm using Spring boot dev Tools, so the app is restarting automatically, but I'm trying to solve it without any restart.
~ edit
error code
~ edit 2
I'm running this app in intellij Tomcat.
this is my FileUploadService
public String uploadImage(MultipartFile multipartFile) throws IOException {
String fileName = multipartFile.getOriginalFilename();
Path uploadDirectory = Paths.get("src/main/resources/static/uploads/");
//Path uploadDirectory = Paths.get("target\\classes\\static\\uploads\\");
try (InputStream inputStream = multipartFile.getInputStream()) {
String path = UUID.randomUUID()+ "-" + fileName;
Path filePath = uploadDirectory.resolve(path);
Files.copy(inputStream, filePath, StandardCopyOption.REPLACE_EXISTING);
return path;
} catch (IOException ioException){
throw new IOException("Error saving uploaded file: " + fileName, ioException);
}
}
this is controller
public String displayArticles(Model model){
final String currentName = SecurityContextHolder.getContext().getAuthentication().getName();
System.out.println(currentName);
model.addAttribute("currentUser", currentName);
model.addAttribute("articles", repoArticle.findAll());
model.addAttribute("comments", commentService.findAll());
model.addAttribute("likes", repoLikes.findByUsername(currentName));
return "display_articles";
}
this is html
<div class="image">
<img th:src="'../uploads/' + ${article.path}" alt="">
</div>
folder tree
This should save your image directly to /target folder and thus make it immediately available (note that both the application resources and code are stored in /target when the app is running)
//use the class loader to get the resource path, rather than hardcoding it
final String uploadLocation = getClass().getClassLoader().getResource("static/uploads").toString();
//we should get rid of file:/, hence the substring
final Path uploadDirectory = Paths.get(uploadLocation.substring(6, uploadLocation.length()) );
The rest of the code can remain the same.
Alternatively, you can specify your own upload folder. For instance,
application.properties
#user home should be present on any computer
files.upload.location=${user.home}/myApp/fileUpload
You would then simply retrive it in your controller,
#Autowired
private Environment environment;
...
final String uploadLocation = environment.getProperty("files.upload.location");
Hope this helps.
Related
i would like to ask how to load a folder as Resource or File in SpringBoot.
Let's say i have src/main/resources/testfolder, I want to do something like:
File f = ResourceUtils.getFile("classpath:testfolder");
^ But then that would fail since ResourceUtils can only load actual file(.txt, .csv etc..), not a folder.. Thank you very much in advance..
Edit:
The reason is that i need to get the absolute path of the folder..
File f = ResouceUtils.getFile("classpath:testfolder");
String folderpath = f.getAbsolutePath();
folderpath should be "/workspace/intellij/ProjectName/src/main/resource/testfolder";
Thanks
As you want to use a temporary directory for testing instead of trying to use Spring classes to obtain a path and shoehorn your test in there use the TemporaryFolder rule from JUnit.
#RunWith(SpringRunner.class)
public class YourTest {
#Rule
private TemporaryFolder tempFolder = new TemporaryFolder();
#Test
public void yourTestMethod() {
String folder = tempFolder.getRoot();
when(yourMock.getOutputFolder()).thenReturn(folder);
// do your thing
// use tempFolder object to check files/read files etc.
}
}
If you have any folder(for ex: config) under resource folder you should try below i mentioned
File file = ResourceUtils.getFile("classpath:config/test.txt")
Read File Content
String content = new String(Files.readAllBytes(file.toPath()));
System.out.println(content);
I am trying to copy image into assets folder inside WEB-INF folder. Following code successfully copy images outside the project but can't copy inside WEB-INF folder.
public static void copyFile(String source, String destination) throws IOException {
try {
File sourceFile = new File(source);
File destinationFile = new File(destination);
FileInputStream fileInputStream = new FileInputStream(sourceFile);
FileOutputStream fileOutputStream = new FileOutputStream(destinationFile);
int bufferSize;
byte[] bufffer = new byte[512];
while ((bufferSize = fileInputStream.read(bufffer)) > 0) {
fileOutputStream.write(bufffer, 0, bufferSize);
}
fileInputStream.close();
fileOutputStream.close();
} catch (IOException e) {
throw new IOException(e.getMessage());
}
}
I get a image path from Http request.
CopyFile.copyFile(imageUrl, "http://localhost:8080/M.S.-Handloom-Fabrics/static/"+imageName+".png");
I have mapped the resources in dispatcher-servlet.xml
<mvc:resources mapping="/static/**" location="/WEB-INF/assets/"/>
Here is the error
Info: http:\localhost:8080\M.S.-Handloom-Fabrics\static\TueJun1216_27_54NPT20180.png (The filename, directory name, or volume label syntax is incorrect)
http://localhost:8080/M.S.-Handloom-Fabrics/static/"+imageName+".png"
is a URL, not a file-path, and is therefore meaningless as a parameter to the File constructor.
IF you configured your app server to explode your webapp on deploy then you could use ServletContext.getRealPath but as this SO post details nicely you most likely do not want to do this as your saved files will be lost upon re-deploy.
Saving them outside of the web app is the way to go.
I'm working on an image manager system for my Spring MVC project, with the basic functions of displaying the gallery of all images stored in the local image folder, deleting images and uploading new images.
I would like that, once a new image is uploaded, the page reloads the images gallery, including the image just added. What it happens in fact is that the new image is correctly saved on the HD, but it doesn't automatically show up in the resources/img folder in the Java project; therefore, once the page is reloaded, the new image is not there. Only when I manually refresh the project, the new image appears in the resources/img folder.
The odd thing is, I don't have the same problem with the delete method: once an image is deleted, it disappears from the HD AND the resources/img folder, and the page reloads the gallery without showing the image just deleted.
Any idea where the problem could be?
Here is my controller
#Controller
public class imagesManagerController {
// READ ALL FILES FROM IMG FOLDER
#RequestMapping(value = "/imagesManager", method = RequestMethod.GET)
public ModelAndView readImages
(#RequestParam(value = "error", required = false) String error) {
// create model and link it to jsp imagesManager
ModelAndView model = new ModelAndView("imagesManager");
// return content from images folder and add it to model
File imgsPath = new File("C:/Users/Alessandro/workspace/SpringMVCBlog/WebContent/resources/img");
String[] imgsNames = imgsPath.list();
model.addObject("imgsNames", imgsNames);
//if upload fails, display error message
if (error != null) {
model.addObject("error",
"Please select a file to upload");
}
return model;
}
//UPLOAD FILE TO HD
#RequestMapping(value = "/imagesManager/upload", method = RequestMethod.POST)
public String handleFileUpload (#RequestParam("file") MultipartFile file) {
//get img name
String imgName = file.getOriginalFilename();
System.out.println(imgName);
//create file path
String folder = "C:/Users/Alessandro/workspace/SpringMVCBlog/WebContent/resources/img/";
File path = new File (folder+imgName);
System.out.println(path);
if (!file.isEmpty()) {
try {
//get bytes array from file
byte[] bytes = file.getBytes();
//create output stream
BufferedOutputStream stream = new BufferedOutputStream(
new FileOutputStream(path));
//write img content on path
stream.write(bytes);
//close stream
stream.close();
//if upload is successful, reload page
return "redirect:/imagesManager";
} catch (Exception e) {
return "You failed to upload " + imgName + " => " + e.getMessage();
}
} else {
return "redirect:/imagesManager?error";
}
}
// DELETE FILE FROM HD
#RequestMapping(value = "/imagesManager/delete", method = RequestMethod.POST)
public String deleteFile(#RequestParam (value="imgName") String imgName) {
//create file path to be deleted
String folder = "C:/Users/Alessandro/workspace/SpringMVCBlog/WebContent/resources/img/";
File path = new File (folder+imgName);
// delete file
if (path.delete()) {
//if delete is successful, reload page
return "redirect:/imagesManager";
} else {
return "Delete operation failed";
}
}
}
The problem is in the path:
WebContent/resources/img
It is refreshing probably due to IDE server auto-deployment. Test with %TEMP% path and check.
1) You should not save uploaded files to the application server file system.
2) You should not save uploaded files to the application folder as it is part of the deployment. It will only be deployed once and that folder is only for the application files.
Instead, use the cloud or a dedicated file system.
I am new to Spring Boot. I have this emailprop.properties in src/main/resource:
//your private key
mail.smtp.dkim.privatekey=classpath:/emailproperties/private.key.der
But I am getting the error as
classpath:\email properties\private.key.der (The filename, directory
name, or volume label syntax is incorrect)
How do I properly load this file?
Update-1
my java code is
dkimSigner = new DKIMSigner(emailProps.getProperty("mail.smtp.dkim.signingdomain"), emailProps.getProperty("mail.smtp.dkim.selector"),
emailProps.getProperty("mail.smtp.dkim.privatekey"));
its working as "D:\\WorkShop\\MyDemoProj\\EmailService\\src\\main\\resources\\private.key.der"Instead of emailProps.getProperty("mail.smtp.dkim.privatekey")
Update-2
i have tried java code is
String data = "";
ClassPathResource cpr = new ClassPathResource("private.key.der");
try {
byte[] bdata = FileCopyUtils.copyToByteArray(cpr.getInputStream());
data = new String(bdata, StandardCharsets.UTF_8);
} catch (IOException e) {
e.printStackTrace();
}
dkimSigner = new DKIMSigner(emailProps.getProperty("mail.smtp.dkim.signingdomain"), emailProps.getProperty("mail.smtp.dkim.selector"),data);
Error is : java.io.FileNotFoundException: class path resource [classpath:private.key.der] cannot be resolved to URL because it does not exist
Tried Code is :
ClassPathResource resource = new ClassPathResource(emailProps.getProperty("mail.smtp.dkim.privatekey"));
File file = resource.getFile();
String absolutePath = file.getAbsolutePath();
Still same error..
please update the answer..
If you want to load this file runtime then you need to use ResourceLoader please have a look here for the documentation - section 8.4.
Resource resource = resourceLoader.getResource("classpath:/emailproperties/private.key.der");
Now if you want to keep this exact path in properties file you can keep it there and then load it in your Autowired constructor/field like that:
#Value("${mail.smtp.dkim.privatekey}") String pathToPrivateKey
and then pass this to the resource loader.
Full example you can find here. I don't want to copy paste it.
If your file is located here:
"D:\\WorkShop\\MyDemoProj\\EmailService\\src\\main\\resources\\private.key.der"
then it should be:
mail.smtp.dkim.privatekey=classpath:private.key.der
EDIT:
I see now, you are using DKIMSigner, which expects file-path string,
Try changing your code like this:
ClassPathResource resource = new ClassPathResource(emailProps.getProperty("mail.smtp.dkim.privatekey"));
File file = resource.getFile();
String absolutePath = file.getAbsolutePath();
dkimSigner = new DKIMSigner(emailProps.getProperty("mail.smtp.dkim.signingdomain"), emailProps.getProperty("mail.smtp.dkim.selector"),absolutePath
);
How can I get a pdf located in a file in a server's directory structure to load in a browser for users of a Spring MVC application?
I have googled this and found postings about how to generate PDFs, but their answers do not work in this situation. For example, this other posting is not relevant because res.setContentType("application/pdf"); in my code below does not solve the problem. Also, this other posting describes how to do it from a database but does not show full working controller code. Other postings had similar problems that caused them not to work in this case.
I need to simply serve up a file (not from a database) and have it been viewable by a user in their browser. The best I have come up with is the code below, which asks the user to download the PDF or to view it in a separate application outside the browser. What specific changes can I make to the specific code below so that the user automatically sees the PDF content inside their browser when they click on the link instead of being prompted to download it?
#RequestMapping(value = "/test-pdf")
public void generatePdf(HttpServletRequest req,HttpServletResponse res){
res.setContentType("application/pdf");
res.setHeader("Content-Disposition", "attachment;filename=report.pdf");
ServletOutputStream outStream=null;
try {
BufferedInputStream bis = new BufferedInputStream(
new FileInputStream(new File("/path/to", "nameOfThe.pdf")));
/*ServletOutputStream*/ outStream = res.getOutputStream();
//to make it easier to change to 8 or 16 KBs
int FILE_CHUNK_SIZE = 1024 * 4;
byte[] chunk = new byte[FILE_CHUNK_SIZE];
int bytesRead = 0;
while ((bytesRead = bis.read(chunk)) != -1) {outStream.write(chunk, 0, bytesRead);}
bis.close();
outStream.flush();
outStream.close();
}
catch (Exception e) {e.printStackTrace();}
}
Change
res.setHeader("Content-Disposition", "attachment;filename=report.pdf");
To
res.setHeader("Content-Disposition", "inline;filename=report.pdf");
You should also set the Content Length
FileCopyUtils is handy:
#Controller
public class FileController {
#RequestMapping("/report")
void getFile(HttpServletResponse response) throws IOException {
String fileName = "report.pdf";
String path = "/path/to/" + fileName;
File file = new File(path);
FileInputStream inputStream = new FileInputStream(file);
response.setContentType("application/pdf");
response.setContentLength((int) file.length());
response.setHeader("Content-Disposition", "inline;filename=\"" + fileName + "\"");
FileCopyUtils.copy(inputStream, response.getOutputStream());
}
}