I want to Unit Test a method that returns a FileContentResult of a PDF file. I am doing some tests to check the content type & file name, but it would be great if I could also generate the PDF somehow as part of the test? I currently have a method as follows:
public FileContentResult ConvertToPDF(int baseClassId)
{
try
{
return new DocumentWriter().ConvertDocumentToPDFSharp(baseClassId);
}
catch (Exception ex)
{
Logger.Instance.LogError("Error in Assessments_FormHeaderController ConvertToPDF", ex);
return new FileContentResult(GetBytes("Error fetching pdf, " + ex.Message + Environment.NewLine + ex.StackTrace), "text/plain");
}
}
and I am testing with the following:
[TestMethod]
public void ReturnFileContentResult()
{
DocumentPDFPrinterController pdfController = new DocumentPDFPrinterController();
FileContentResult result = pdfController.ConvertToPDF(0);
Assert.IsTrue(result.ContentType == "application/pdf" && result.FileDownloadName.Contains(".pdf"));
}
Can I add anything to this text which will create the pdf file in a given location(user downloads?).
Should have done some more investigating before putting the question out there. I have found simply adding the following got the job done for me:
System.IO.File.WriteAllBytes(#"C:\Users\username\Downloads\Test.pdf", result.FileContents);
That generates my file nicely.
Related
I am trying to read an Excel file in manipulate it or add new data to it and write it back out. I am also trying to do this a complete reactive process using Flux and Mono. The Idea is to return the resulting file or bytearray via a webservice.
My question is how do I get a InputStream and OutputStream in a non blocking way?
I am using the Apache Poi library to read and generate the Excel File.
I currently have a solution based around a mix of Mono.fromCallable() and Blocking code getting the Input Stream.
For example the webservice part is as follows.
#GetMapping(value = API_BASE_PATH + "/download", produces = "application/vnd.ms-excel")
public Mono<ByteArrayResource> download() {
Flux<TimeKeepingEntry> createExcel = excelExport.createDocument(false);
return createExcel.then(Mono.fromCallable(() -> {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
excelExport.getWb().write(outputStream);
return new ByteArrayResource(outputStream.toByteArray());
}).subscribeOn(Schedulers.elastic()));
}
And the Processing of the file:
public Flux<TimeKeepingEntry> createDocument(boolean all) {
Flux<TimeKeepingEntry> entries = null;
try {
InputStream inputStream = new ClassPathResource("Timesheet Template.xlsx").getInputStream();
wb = WorkbookFactory.create(inputStream);
Sheet sheet = wb.getSheetAt(0);
log.info("Created document");
if (all) {
//all entries
} else {
entries = service.findByMonth(currentMonthName).log("Excel Export - retrievedMonths").sort(Comparator.comparing(TimeKeepingEntry::getDateOfMonth)).doOnNext(timeKeepingEntry-> {
this.populateEntry(sheet, timeKeepingEntry);
});
}
} catch (IOException e) {
log.error("Error Importing File", e);
}
return entries;
}
This works well enough but not very in line with Flux and Mono. Some guidance here would be good. I would prefer to have the whole sequence non-blocking.
Unfortunately the WorkbookFactory.create() operation is blocking, so you have to perform that operation using imperative code. However fetching each timeKeepingEntry can be done reactively. Your code would looks something like this:
public Flux<TimeKeepingEntry> createDocument() {
return Flux.generate(
this::getWorkbookSheet,
(sheet, sink) -> {
sink.next(getNextTimeKeepingEntryFrom(sheet));
},
this::closeWorkbook);
}
This will keep the workbook in memory, but will fetch each entry on demand when the elements of the Flux are requested.
I need download and save file. I using this code (with Xam.Plugins.DownloadManager and PCLStorage libraries):
public static string DownloadNewXml(string LinkToFile, string PathFile)
{
var downloadManager = CrossDownloadManager.Current;
CrossDownloadManager.Current.PathNameForDownloadedFile = new System.Func<IDownloadFile, string>(file => {
return PathFile;
});
try
{
var file = downloadManager.CreateDownloadFile(LinkToFile);
downloadManager.Start(file);
return "ok";
}
catch(Exception e)
{
return e.ToString() ;
}
}
Where PathFile is: FileSystem.Current.LocalStorage.Path + "file.xml";
This code throw exception on Android and UWP - i can't write file to this path (FileSystem.Current.LocalStorage.Path). So I have a question. How to get path to writable folder for my application on all platforms (Android, UWP, iOS)? Please help.
Try use Path.Combine(FileSystem.Current.LocalStorage.Path, "file.xml") instead
I have below HTML code:
<img title="hotelThumbImage" id="hotelThumbImage01" width="140px" height="129px"
src="/b2c/images/?url=FixedPkgB2c/FF-252-325"/>
It renders in IE as below:
It renders in all other browser like FireFox and Chrome as:
Related question : How to make a Servlet call form UI which returns the Content itself and place an img tag using Script in the output?
My project is suffering from this too, and it's because IE prevents download/display of files which have a different encoding than their extension. It has something to do with malicious code being able to be hidden as image files simply by changing the extension of the file.
Firefox and Chrome are smart enough to display it as an image so long as the encoding is that of an image, but IE takes no chances, it seems.
You'll have to add the extension that matches your image's encoding for it to display in IE.
Edit: It's also possible that your server is sending the file with a header denoting plain text. Again, Firefox and Chrome are smart enough to handle it, but IE isn't. See: https://stackoverflow.com/a/32988576/4793951
Welcome to IE world... :(
What i would do, in order to have better control of the situation is to modify the getter method, so in Holiday.getPkgCode():
public String getPkgCode() throws IOException {
if (!this.pkgCode.contains(".")) {
String ext = ImgUtil.determineFormat(this.pkgCode);
return this.pkgCode + ImgUtil.toExtension(ext);
} else {
return this.pkgCode;
}
}
To use it you will need to catch exceptions and this ImgUtil class adapted from here:
class ImgUtil {
public static String determineFormat(String name) throws IOException {
// get image format in a file
File file = new File(name);
// create an image input stream from the specified file
ImageInputStream iis = ImageIO.createImageInputStream(file);
// get all currently registered readers that recognize the image format
Iterator<ImageReader> iter = ImageIO.getImageReaders(iis);
if (!iter.hasNext()) {
throw new RuntimeException("No readers found!");
}
// get the first reader
ImageReader reader = iter.next();
String toReturn = reader.getFormatName();
// close stream
iis.close();
return toReturn;
}
public static String toExtension(String ext) {
switch (ext) {
case "JPEG": return ".jpg";
case "PNG": return ".png";
}
return null;
}
}
TEST IT:
NOTE: I placed an image (jpg) without extension placed in C:\tmp folder
public class Q37052184 {
String pkgCode = "C:\\tmp\\yorch";
public static void main(String[] args) throws IOException {
Q37052184 q = new Q37052184();
System.out.println(q.getPkgCode());
}
// the given getter!!!
}
OUTPUT:
C:\tmp\yorch.jpg
You have to set the Content Type property of responses' header in the servlet.
For example in spring 4 mvc,
#GetMapping(value = "/b2c/images/?url=FixedPkgB2c/FF-252-325")
public ResponseEntity<byte []> getImageThumbnail() {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(media type));
byte [] content= ...;
return ResponseEntity.ok().headers(headers).body(content);
}
I am currently working in Enterprise Java and I'm a newbie. I am trying to create a method which should delete a selected item from a data table. My project contains Graphical User Interface elements from "http://www.primefaces.org/showcase/".
The deletion is made through a web-service.
This is the method I created so far:
public boolean delete(String articleId) {
Client client = ClientBuilder.newClient();
WebTarget target
= client.target(DELETE_URL);//this is a String
//TODO call ws method delete
try{
target.request()....;
} catch(Exception ex) {
LOGGER.error("Delete Article Error ", ex);
}
return true;
}
Could you tell me how can I handle the deletion in an appropiate way?
All the best!
In your case the following should do the trick.
target.request().delete(Response.class)
Dear All,
Working on Spring MVC. I want to upload more than one images from the client. How to achieve it. I know how to handle the multipart form data for single image. But now I am expecting some data with some images from the client.
Any help or url that will help me.
Thanks,
Op
Image is also a file. Whether you would be storing it in database / in file system but it is still a file.
In spring MVC, you could do as shown in the below link:
http://viralpatel.net/blogs/spring-mvc-multiple-file-upload-example/
Here are the code i tried and it is working fine at my end.
//Handle multiple images
#RequestMapping(method = RequestMethod.POST, value="upload", consumes=MediaType.MULTIPART_FORM_DATA_VALUE,
produces=MediaType.APPLICATION_JSON_VALUE)
public #ResponseBody JSONResponse uploadImages(HttpServletRequest req)
throws Exception {
try{
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) req;
Set set = multipartRequest.getFileMap().entrySet();
Iterator i = set.iterator();
while(i.hasNext()) {
Map.Entry me = (Map.Entry)i.next();
String fileName = (String)me.getKey()+"_"+System.currentTimeMillis();
MultipartFile multipartFile = (MultipartFile)me.getValue();
System.out.println("Original fileName - " + multipartFile.getOriginalFilename());
System.out.println("fileName - " + fileName);
saveImage(fileName, multipartFile);
}
}
catch(Exception e){
e.printStackTrace();
}
return new JSONResponse();
}