Good morning!
I'm using the iText library to create a pdf template and Primefaces to display the content on a web application.
When I ran the first test to see if all the libraries were all set, it was displayed normally. But then I made some changes, and it seems that something is caching my first test in memory and it is the only thing displayed, no matter what changes I make it keeps the same first content. I´ve already cleaned up my netbeans project, closed the IDE and also restarted the computer.
Thats is my tag on the jsf page:
<p:media value="#{atividadeController.pdfContent}" player="pdf" width="100%" height="700px"/>
And here is my method in the managed bean, which is a SessionScoped:
public String preparePdf()
{
try {
ByteArrayOutputStream output = new ByteArrayOutputStream();
Font fontHeader = new Font(Font.FontFamily.HELVETICA, 20, Font.BOLD);
Font fontLine = new Font(Font.FontFamily.TIMES_ROMAN, 14);
Font fontLineBold = new Font(Font.FontFamily.TIMES_ROMAN, 14, Font.BOLD);
Document document = new Document();
PdfWriter.getInstance(document, output);
document.open();
//Writing document
Chunk preface = new Chunk("GERAL", fontHeader);
document.add(preface);
Calendar cal = Calendar.getInstance();
cal.setTime(current.getData());
int year = cal.get(Calendar.YEAR);
int month = 1 + cal.get(Calendar.MONTH);
int day = cal.get(Calendar.DAY_OF_MONTH);
String dateStr = day+"/"+month+"/"+year;
Paragraph dataAndHour = new Paragraph(dateStr, fontLine);
document.add(dataAndHour);
document.close();
pdfContent = new DefaultStreamedContent(new ByteArrayInputStream(output.toByteArray()), "application/pdf");
} catch (Exception e) {
e.printStackTrace();
}
return "/views/view_atividade_pdf";
}
There is no exception on the server log.
I really aprecciate any help. Thanks in advance
Related
Iam trying to write a xls download for my Spring boot application. In order to generate the file Iam using POI. If I download the file directly from my Controller without passing it to the front-end like so:
//Wrote this one just for testing if the file is already corrupt here.
FileOutputStream fos = new FileOutputStream("C:\\dev\\directDownload.xls");
fos.write(byteArray);
fos.flush();
fos.close();
}
It works just fine and the file looks like this:
xls when downloaded from the backend without passing it to angular:
However thats not my goal. I intend to pass the Outputstream to my angular component. The Component calls a function from a service class. This class gets the response from the controller and passes it back to my component. In the UI the downloading dialog opens. The problem is, that the downloaded file looks like this (doesnt matter if its opened via excel or open office):
Currupt xls:
My Java Controller:
#CrossOrigin(exposedHeaders = "Content-Disposition")
#RequestMapping(value = "/report/file", produces = "application/vnd.ms-excel;charset=UTF-8")
public void getReportFile(#RequestParam(name = "projectNumber") final String projectNumber,
#RequestParam(name = "month") final int month, #RequestParam(name = "year") final int year,
#RequestParam(name = "employee") final int employee,
#RequestParam(name = "tsKey") final String tsKey,
final HttpServletResponse response) throws IOException {
response.setContentType("application/vnd.ms-excel;charset=UTF-8");
String excelFileName = "test.xls";
String headerKey = "Content-Disposition";
String headerValue = String.format("attachment; filename=\"%s\"",
excelFileName);
response.setHeader(headerKey, headerValue);
//Here I create the workbook that I want to download
ProjectMonthReport report = reportService.getReport(projectNumber, month, year);
//ExcelService builts the workbook using POI
Workbook workbook = excelService.exportExcel(report, employee, tsKey);
//The response is stored in an outputstream
OutputStream out = response.getOutputStream();
response.setContentType("application/vnd.ms-excel");
byte[] byteArray = ((HSSFWorkbook)workbook).getBytes();
out.write(byteArray);
out.flush();
out.close();
//Wrote this one just for testing if the file is already corrupt here. --> It's fine.
FileOutputStream fos = new FileOutputStream("C:\\dev\\directDownload.xls");
fos.write(byteArray);
fos.flush();
fos.close();
}
The Java Service method that builds the file using POI:
public Workbook exportExcel(final ProjectMonthReport report, final int employee, final String tsKey) throws IOException,
InvalidFormatException {
Workbook workbook = new HSSFWorkbook();
CreationHelper createHelper = workbook.getCreationHelper();
// Create a Sheet
Sheet sheet = workbook.createSheet("Employee");
// Create a Font for styling header cells
Font headerFont = workbook.createFont();
headerFont.setBold(true);
headerFont.setFontHeightInPoints((short) 14);
headerFont.setColor(IndexedColors.RED.getIndex());
// Create a CellStyle with the font
CellStyle headerCellStyle = workbook.createCellStyle();
headerCellStyle.setFont(headerFont);
Row headeRow = sheet.createRow(0);
Cell dateHeader = headeRow.createCell(0);
dateHeader.setCellValue("Datum");
Cell startHeader = headeRow.createCell(1);
startHeader.setCellValue("Beginn");
Cell endHeader = headeRow.createCell(2);
endHeader.setCellValue("Ende");
Cell activityHeader = headeRow.createCell(3);
activityHeader.setCellValue("Tätigkeitsbereit");
Cell cardHeader = headeRow.createCell(4);
cardHeader.setCellValue("Kartennummer");
List<WorkDescriptionDetail> details = report.getEmployees().get(employee).getKeyDetailMap().get(Integer.valueOf(tsKey)).getDetailList();
int counter = 1;
for (WorkDescriptionDetail detail : details) {
List <String> stringList= detail.toStringList();
Row row = sheet.createRow(counter);
Cell cellDate = row.createCell(0);
cellDate.setCellValue(stringList.get(0));
Cell cellStart = row.createCell(1);
cellStart.setCellValue(stringList.get(1));
Cell cellEnd = row.createCell(2);
cellEnd.setCellValue(stringList.get(2));
Cell cellActivity = row.createCell(3);
cellActivity.setCellValue(stringList.get(3));
counter ++;
}
return workbook;
}
My angular component:
saveFile(employee: string, tsKey:string) {
this.subscription = this.reportService.saveXlsFile(this.projectNumber, this.year, this.month, employee, tsKey)
.subscribe(response=> {
console.log(response);
let mediatype = 'application/vnd.ms-excel;charset=UTF-8';
const data = new Blob(["\ufeff",response.arrayBuffer()], {type: mediatype});
console.log(data);
saveAs(data, 'test.xls');
},
error => console.log("error downloading the file"));
}
The Ts Service Function that is called:
saveXlsFile(projectNumber:string, year:string, month:string, empId: string, tsKey:string) {
let params:URLSearchParams = new URLSearchParams();
params.set('projectNumber', projectNumber);
console.log(projectNumber);
params.set('month', month);
console.log(month);
params.set( 'year', year);
console.log(year);
params.set('employee', empId);
console.log(empId);
params.set('tsKey', tsKey);
console.log(tsKey);
return this.http.get(this.baseUrl + "/file", { search: params } );
}
I tried to retrieve the response via Postman and directly download the file. When I do that the file can't be opened by excel (Excel just crashed), however I can open the file in the OpenOffice version and it works fine. Its also not corrupted.
I've been searching the web for the last couple of days and I think it may be an enconding problem caused in the frontend. But maybe it is also SpringBoot thats playing me here. Any suggestions?
Thank you for your help!
Hey I found the solution to this problem yesterday myself. Adding the following in the angular service:
return this.http.get(this.baseUrl + "/file", { search: params, responseType: ResponseContentType.Blob }).map(
(res) => {
return new Blob([res.blob()], { type: 'application/vnd.ms-excel' });
});
After that you'll need to modify the component like so:
saveFile(employee: string, tsKey:string) {
this.subscription = this.reportService.saveXlsFile(this.projectNumber, this.year, this.month, employee, tsKey)
.subscribe(response=> {
console.log(response);
let mediatype = 'application/vnd.ms-excel';
saveAs(response, 'test.xlsx');
},
error => console.log("error downloading the file"));
}
So the Problem was that I was not getting a blob Object in my response....
Good day to Stackoverflow community,
I am in need of some expert assistance. I have an MVC4 web app that has a few rich text box fields powered by TinyMCE. Up until now the system is working great. Last week my client informed me that they want to export the data stored in Microsoft SQL to Excel to run custom reports.
I am able to export the data to excel with the code supplied. However it is exporting the data in RTF rather than Plain text. This is causing issues when they try to read the content.
Due to lack of knowledge and or understanding I am unable to figure this out. I did read that it is possible to use regex to do this however I have no idea how to implement this. So I turn to you for assistance.
public ActionResult ExportReferralData()
{
GridView gv = new GridView();
gv.DataSource = db.Referrals.ToList();
gv.DataBind();
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment; filename=UnderwritingReferrals.xls");
Response.ContentType = "application/ms-excel";
Response.AddHeader("Content-Type", "application/vnd.ms-excel");
Response.Charset = "";
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
gv.RenderControl(htw);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
return RedirectToAction("Index");
}
I would really appreciate any assistance. and thank you in advance.
I have looked for solutions on YouTube and web forums with out any success.
Kind Regards
Francois Muller
One option you can perform is to massage the Data you write to the XML file.
For example, idenfity in your string and replace it with string.Empty.
Similarly can be replaced with string.Empty.
Once you have identified all the variants of the Rich Text HTML tags, you can just create a list of the Tags, and inside a for FOR loop replace each of them with a suitable string.
Did you try saving the file as .xslx and sending over to the client.
The newer Excel format might handle the data more gracefully?
Add this function to your code, and then you can invoke the function passing it in the HTML string. The return output will be HTML free.
Warning: This does not work for all cases and should not be used to process untrusted user input. Please test it with variants of your input string.
public static string StripTagsCharArray(string source)
{
char[] array = new char[source.Length];
int arrayIndex = 0;
bool inside = false;
for (int i = 0; i < source.Length; i++)
{
char let = source[i];
if (let == '<')
{ inside = true; continue; }
if (let == '>') { inside = false; continue; }
if (!inside) { array[arrayIndex] = let; arrayIndex++; }
}
return new string(array, 0, arrayIndex);
}
So I managed to resolve this issue by changing the original code as follow:
As I'm only trying to convert a few columns, I found this to be working well. This will ensure each records is separated by row in Excel and converts the Html to plain text allowing users to add column filters in Excel.
I hope this helps any one else that has a similar issue.
GridView gv = new GridView();
var From = RExportFrom;
var To = RExportTo;
if (RExportFrom == null || RExportTo == null)
{
/* The actual code to be used */
gv.DataSource = db.Referrals.OrderBy(m =>m.Date_Logged).ToList();
}
else
{
gv.DataSource = db.Referrals.Where(m => m.Date_Logged >= From && m.Date_Logged <= To).OrderBy(m => m.Date_Logged).ToList();
}
gv.DataBind();
foreach (GridViewRow row in gv.Rows)
{
if (row.Cells[20].Text.Contains("<"))
{
row.Cells[20].Text = Regex.Replace(row.Cells[20].Text, "<(?<tag>.+?)(>|>)", " ");
}
if (row.Cells[21].Text.Contains("<"))
{
row.Cells[21].Text = Regex.Replace(row.Cells[21].Text, "<(?<tag>.+?)(>|>)", " ");
}
if (row.Cells[22].Text.Contains("<"))
{
row.Cells[22].Text = Regex.Replace(row.Cells[22].Text, "<(?<tag>.+?)(>|>)", " ");
}
if (row.Cells[37].Text.Contains("<"))
{
row.Cells[37].Text = Regex.Replace(row.Cells[37].Text, "<(?<tag>.+?)(>|>)", " ");
}
if (row.Cells[50].Text.Contains("<"))
{
row.Cells[50].Text = Regex.Replace(row.Cells[37].Text, "<(?<tag>.+?)(>|>)", " ");
}
}
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment; filename=Referrals " + DateTime.Now.ToString("dd/MM/yyyy") + ".xls");
Response.ContentType = "application/ms-excel";
Response.ContentEncoding = System.Text.Encoding.UTF8;
Response.AddHeader("Content-Type", "application/vnd.ms-excel");
Response.Charset = "";
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
gv.RenderControl(htw);
//This code will export the data to Excel and remove all HTML Tags to pass everything into Plain text.
//I am using HttpUtility.HtmlDecode twice as the first instance changes null values to "Â" the second time it will run the replace code.
//I am using Regex.Replace to change the headings to more understandable headings rather than the headings produced by the Model.
Response.Write(HttpUtility.HtmlDecode(sw.ToString())
.Replace("Cover_Details", "Referral Detail")
.Replace("Id", "Identity Number")
.Replace("Unique_Ref", "Reference Number")
.Replace("Date_Logged", "Date Logged")
.Replace("Logged_By", "File Number")
.Replace("Date_Referral", "Date of Referral")
.Replace("Referred_By", "Name of Referrer")
.Replace("UWRules", "Underwriting Rules")
.Replace("Referred_To", "Name of Referrer")
);
Response.Flush();
Response.End();
TempData["success"] = "Data successfully exported!";
return RedirectToAction("Index");
}
I'm new to Xamarin. I'm trying display a list of downloaded images. I am downloading images from an APP API on Azure, where I stored the file on Azure Storage.
My server code is the following:
public HttpResponseMessage Get(string PK, string RK)
{
//Creating CloudBlockBlolb...
byte[] bytes = new byte[blockBlob.Properties.Length]
for(int i = 0; i < blockBlob.Properties.Length; i++){
bytes[i] = 0x20;
}
blockBlob.DownloadToByteArray(bytes, 0);
HttpResponseMessage resp = new HttpResponseMessage(HttpStatusCode.OK);
resp.Content = new ByteArrayContent(bytes);
resp.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("image/jpg");
return resp;
}
My Xamarin code is the following:
public MainPage ()
{
//...
List<PicturePost> list = new List<PicturePost>{
new PicturePost("title", "subtitle", "link/api/Pictures?PK=xxx&RK=yyy")
};
InitializeComponent ();
listView.ItemTemplate = new DataTemplate (typeof(CustomImageCell));
listView.HasUnevenRows = true;
listView.ItemsSource = list;
//...
}
And here is the relevant code for CustomImageCell:
var image = new Image ();
image.SetBinding (Image.SourceProperty, "image");
//...
horizontalLayout.Children.Add (image);
I know that my API call works, because when I test it on the browser, it returns the image. I also know that if I use any random links such as http://www.natureasia.com/common/img/splash/thailand.jpg the image is downloaded and displayed properly. It is only when I use the API link that it doesn't seem to be working. Can someone tell me what I am doing wrong?
so in my public MainPage(), I added the following:
listView.BeginRefresh ();
listView.EndRefresh ();
I realized at some point that the images would take some time to download. I assume that when the listView was created, the images were not finished downloading, so I added the code above... Pretty sure this is not the best way to do this (probably an await would be better, but I don't know where).
This question already has answers here:
How to provide a file download from a JSF backing bean?
(5 answers)
Closed 6 years ago.
I'm trying to show a web printed report made with JasperReports 6.2.0 in an application with JSF 2.2.
Happens that the report is correctly shown, in a new tab, after setting target="_blank" on my h:form, but the download button doesn't work.
Here's the code:
HttpServletResponse response = (HttpServletResponse) FacesContext context = FacesContext.getCurrentInstance().getExternalContext().getResponse();
response.setContentType("application/pdf");
ServletOutputStream responseStream = response.getOutputStream();
ByteArrayInputStream relatorioSourceStream = new ByteArrayInputStream(reportJasper);
JasperPrint jp = JasperFillManager.fillReport(relatorioSourceStream, parameters, getConnection());
File file = new java.io.File(path);
if (file.exists()) {
file.delete();
} else if (file.getParentFile() != null) {
file.getParentFile().mkdirs();
file.createNewFile();
}
JRPdfExporter exporter = new JRPdfExporter();
exporter.setExporterInput(new SimpleExporterInput(jp));
exporter.setExporterOutput(new SimpleOutputStreamExporterOutput(file));
SimplePdfExporterConfiguration conf = new SimplePdfExporterConfiguration();
exporter.setConfiguration(conf);
exporter.exportReport();
InputStream is = new FileInputStream(file);
int read = 0;
byte[] bytes = new byte[4096];
while ((read = is.read(bytes)) != -1) {
responseStream.write(bytes, 0, read);
}
responseStream.flush();
responseStream.close();
Happens that the report is correctly shown, but the download won't do anything.
It's not quite a "save as" option that I want to be shown when the report tab is loaded, It happens that the chrome api's download button tries to save my page (html) instead of saving the content as a .pdf file.
Thanks in advance.
Successfully generated your error: on chomre:Version 51.0.2704.106 m, You have one alternate way on this. You can directly download such file by using
httpServletResponse.addHeader("Content-disposition", "attachment; filename=" + outputFileName);
command also define file name. Hope will find solution to the problem.
i'm making a pdf report, i'm using Jsf, primefaces, actually i can see the report in a dialog without problems but when i download the pdf, it's can't show. The message from adobe reader is that file is damaged.
This is my code:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
DynamicReports.report()
.setTemplate(Plantillas.reportTemplate)
.columns(stateColumn, statePorc)
.title(Templates.createTitleComponent2("Tittle"))
.summary(
DynamicReports.cht.barChart()
.setTitleFont(boldFont)
.setCategory(stateColumn)
.series(
DynamicReports.cht.serie(itemColumn).setSeries(stateColumn)
)
.setCategoryAxisFormat(DynamicReports.cht.axisFormat().setLabel("Label"))
)
.pageFooter(Templates.footerComponent)
.setDataSource(createDataSource3())
.toPdf(baos);
InputStream inputStream = new ByteArrayInputStream(baos.toByteArray());
barStream = new DefaultStreamedContent(inputStream, "application/pdf", "example.pdf");
setBarStream(barStream);
} catch (DRException e) {
e.printStackTrace();
}
set this way to export.
report.toPdf(new FileOutputStream(new File("D:/report11.pdf")));