I really hope you will be able to help me out on this one.
I am new to pdf.js so for the moment, I am playing around with the pre-built version to see if I can integrate this into my web app.
My problem:
I am using tcpdf to generate a pdf file which I would like to visualize using pdf.js without having to save it to a file on the server.
I have a php file (generate_document.php) that I use to generate the pdf. The file ends with the following:
$pdf->Output('test.pdf', 'I');
according to the tcpdf documentation, the second parameter can be used to generate the following formats:
I: send the file inline to the browser (default). The plug-in is used if available. The name given by name is used when one selects the "Save as" option on the link generating the PDF.
D: send to the browser and force a file download with the name given by name.
F: save to a local server file with the name given by name.
S: return the document as a string (name is ignored).
FI: equivalent to F + I option
FD: equivalent to F + D option
E: return the document as base64 mime multi-part email attachment (RFC 2045)
Then, I would like to view the pdf using pdf.js without creating a file on the server (= not using 'F' as a second parameter and passing the file name to pdf.js).
So, I thought I could simply create an iframe and call the pdf.js viewer pointing to the php file:
<iframe width="100%" height="100%" src="/pdf.js_folder/web/viewer.html?file=get_document.php"></iframe>
However, this is not working at all....do you have any idea what I am overlooking? Or is this option not available in pdf.js?
I have done some research and I have seen some posts here on converting a base64 stream to a typed array but I do not see how this would be a solution to this problem.
Many thanks for your help!!!
EDIT
#async, thanks for your anwer.
I got it figured out in the meantime, so I thought I'd share my solution with you guys.
1) In my get_document.php, I changed the output statement to convert it directly to base64 using
$pdf_output = base64_encode($pdf->Output('test_file.pdf', 'S'));
2) In viewer.js, I use an XHR to call the get_document.php and put the return in a variable (pdf_from_XHR)
3) Next, I convert what came in from the XHR request using the solution that was already mentioned in a few other posts (e.g. Pdf.js and viewer.js. Pass a stream or blob to the viewer)
pdf_converted = convertDataURIToBinary(pdf_from_XHR)
function convertDataURIToBinary(dataURI) {
var base64Index = dataURI.indexOf(BASE64_MARKER) + BASE64_MARKER.length;
var base64 = dataURI.substring(base64Index);
var raw = window.atob(base64);
var rawLength = raw.length;
var array = new Uint8Array(new ArrayBuffer(rawLength));
for (i = 0; i < rawLength; i++) {
array[i] = raw.charCodeAt(i);
}
return array;
}
et voilà ;-)
Now i can inject what is coming from that function into the getDocument statement:
PDFJS.getDocument(pdf_converted).then(function (pdf) {
pdfDocument = pdf;
var url = URL.createObjectURL(blob);
PDFView.load(pdfDocument, 1.5)
})
Related
I have used PDFTron to update/edit PDF files. I have followed the documentation for opening the PDF file which came from server, but I am not sure how to save the edited PDF file with this SDK (PDFTron).
I have referred below links to save PDF, but did not succeed.
https://www.pdftron.com/documentation/ios/guides/features/forms/export-data/
https://www.pdftron.com/api/ios/Enums/PTSaveOptions.html
I want to send XFDF file formats to server.
PDFTron saves PDF with annotation automatically after some time interval, but I want it to be saved by save button press. I am stuck on this saving process.
I have below code to import annotation and I don't know how to import this XFDF file and where do to get this XFDF file.
// Import annotations from XFDF to FDF
let fdf_doc: PTFDFDoc = PTFDFDoc.create(fromXFDF: xfdf_filename)
// Optionally read XFDF from a string
let fdf_doc: PTFDFDOc = PTFDFDoc.create(fromXFDF: xfdf_string)
// Merge FDF data into PDF doc
let doc: PTPDFDoc = PTPDFDoc(filepath: filename)
doc.fdfMerge(fdf_doc)
I don't want it to be customisations by myself, I just want it to be saved by me on pressing button.
Below is my query
How do I save the applied annotation on PDF by myself?
Once you've applied changes to the document data you'll probably want to do something with the updated PDF like letting the user download it or sending it back to your server.
If you just want to let the user download the edited file then no extra changes are necessary as pressing the download button will save the modified PDF to the user's computer.
To add a custom save button, here is a code sample.
If you want to get the modified PDF as an ArrayBuffer then you can use the
getFileData function on Document.
For example:
WebViewer(...)
.then(instance => {
const { documentViewer, annotationManager } = instance.Core;
documentViewer.addEventListener('documentLoaded', async () => {
const doc = documentViewer.getDocument();
const xfdfString = await annotationManager.exportAnnotations();
const options = { xfdfString };
const data = await doc.getFileData(options);
const arr = new Uint8Array(data);
const blob = new Blob([arr], { type: 'application/pdf' });
// upload blob to your server
});
});
I have followed the documentation for opening the PDF file which came from server
There are a few ways to do this - could you share which API you are using?
The main point of your question seems to be how to save the PDF via a button press (after you've merged in XFDF annotation data). Is this the case?
You can control where a remote document is shared by implementing the relevant delegate methods, likely specifically https://www.pdftron.com/api/ios/Protocols/PTDocumentControllerDelegate.html#/c:objc(pl)PTDocumentControllerDelegate(im)documentController:destinationURLForDocumentAtURL:
You can then save the document using this method:
https://www.pdftron.com/api/ios/Classes/PTDocumentBaseViewController.html#/c:objc(cs)PTDocumentBaseViewController(im)saveDocument:completionHandler:
I'm trying to parse a HTML to retrieve the value of tag, on my Google Apps Script code. contains line breaks in attributes, and appears more than once but I only want the first value. (In this case, only 'foo' is required.)
<b class="
"
>
foo
</b><b class="
"
>
var
</b>
On Google Apps Script, functions such as 'getElementByTagName' is not available. So I first though of using regexp but it's not the wise option here.
Does anyone have an idea on how I can move forward? Any comment/guess would be highly appreciated!
How about using XmlService for your situation as a workaround? At XmlService, even if there are several line breaks in the tags, the value can be retrieved. I think that there are several workarounds for your situation. So please think of this as one of them.
The flow of sample script is as follows.
Flow :
Add the header of xml and a root element tag to the html.
Parse the creates xml value using XmlService.
Retrieve the first value of tags using XmlService.
Sample script :
var html = '<b class="\n"\n>\nfoo\n</b><b class="\n"\n>\nvar\n</b>\n'; // Your sample value
var xml = '<?xml version="1.0"?><sampleContents>' + html + '</sampleContents>';
var res = XmlService.parse(xml).getRootElement().getChildren()[0].getText().trim();
Logger.log(res) // foo
Note :
In this sample script, your sample html was used. So if you use more complicated one, can you provide it? I would like to modify the script.
Reference :
XML Service
If this was not what you want, please tell me. I would like to modify it.
Edit 1 :
Unfortunately, for the value retrieved from the URL, above script cannot be used. So I used "Parser" which is a GAS library for your situation. The sample script is as follows.
Sample script :
var url = "https://www.booking.com/searchresults.ja.html?ss=kyoto&checkin_year=2018&checkin_month=10&checkin_monthday=1&checkout_year=2018&checkout_month=10&checkout_monthday=2&no_rooms=1&group_adults=1&group_children=0";
var html = UrlFetchApp.fetch(url).getContentText();
var res = Parser.data(html).from("<b class=\"\n\"\n>").to("</b>").build().trim();
Logger.log(res) // US$11
Note :
Before you run this script, please install "Parser". About the install of library, you can see it at here.
The project key of the library is M1lugvAXKKtUxn_vdAG9JZleS6DrsjUUV
References :
Parser
Managing libraries
google app script Exceeded memory limit
google script scrape parser with 2 classes with the same name
Edit 2 :
For your 2nd URL in your comment, it seems that the URL is different from your 1st one. And also your new URL has no tag of <b class=\"\n\"\n>. By this, the value you want cannot be retrieved. But from the 1st URL in your comment, I presumed about the value what you want. Please confirm the following script?
var url = "https://www.booking.com/searchresults.ja.html?ss=kyotogranvia&checkin_year=2018&checkin_month=10&checkin_monthday=1&checkout_year=2018&checkout_month=10&checkout_monthday=2&no_rooms=1&group_adults=1&group_children=0";
var html = UrlFetchApp.fetch(url).getContentText();
var res = Parser.data(html).from("<span class=\"lp-postcard-avg-price-value\">").to("</span>").build().trim();
Logger.log(res) // US$289
I am trying to export some data to excel and download the file via the browser. I have a method that creates an active workbook that returns a byte array in the following way:
byte[] doc = be.GetActiveWorkbook(excelApp);
The method GetActiveWorkBook looks like this:
public byte[] GetActiveWorkbook(Application app)
{
string path = Path.GetTempFileName();
try
{
app.ActiveWorkbook.SaveCopyAs(path);
return File.ReadAllBytes(path);
}
finally
{
if (File.Exists(path))
File.Delete(path);
}
}
Lastly, the file is returned like this:
var file = File(doc, "application/vnd.ms-excel");
file.FileDownloadName = filename + " " + id + ".xlsx";
return file;
The excel file is indeed downloaded to the browser, however it seems like there are processes in the background that are still active, even though I close the excel file in my desktop. Why is this?
The Excel Interop is a nightmare for disposing of properly. Probably worth checking your code outside of the method you've posted to see how you're cleaning up the Excel Application that's passed in:
How do I properly clean up Excel interop objects?
I have a set of RDL reports hosted on the report server instance. Some of the report renders more than 100,000 records on the ReportViewer. So that it takes quite long time to render it on the Viewer. So, we decided to go with Export the content directly from the server based on the user input parameters for the report as well as export file format.
Main thing here, I do not want the user to wait until the export file available for download. Rather, User can submit the action and can proceed to do other works. In the background, the program has to export the file to some physical location. When the download will be available, the user will be informed with some notification about the exported file.
I found the way in this Link. I need to know what are the ways to achieve the above mentioned functionality as well as how to pass the input parameters for the report. Pl suggest me.
Note: I was using XML as datasource for the rdl reports.
EDIT
I found something useful and did the coding like the below,
string path = ServerURL +"?" + _reportFolder + "ReportName&rs:Command=Render&rs:Format=PDF";
WebRequest req = WebRequest.Create(path);
string reportParametersQT = String.Empty;
req.Credentials = CredentialCache.DefaultNetworkCredentials;
WebResponse response = req.GetResponse();
Stream stream = response.GetResponseStream();
//screen.Response.Clear();
string enCodeFileName = HttpUtility.UrlEncode("fileName.pdf", System.Text.Encoding.UTF8);
// The word attachment in Addheader is used to directly show the save dialog box in browser
Response.AddHeader("content-disposition", "attachment; filename=" + enCodeFileName);
Response.BufferOutput = false; // to prevent buffering
Response.ContentType = response.ContentType;
byte[] buffer = new byte[1024];
int bytesRead = 0;
while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) > 0)
{
Response.OutputStream.Write(buffer, 0, bytesRead);
}
Response.End();
I am able to download the exported file. But need to save the file in physical location instead of downloading. I dont know how to do that.
Both of these are very easy to do. You essentially just pass the parameters in the URL that you're calling, for example for a parameter called "LearnerList" you add &LearnerList=12345 to the URL. For exporting, add an additional paramter for Format=PDF (or whatever you want the file as) to get the report to export as a PDF instead of generating in Report Viewer.
Here's an example URL:
https://reporting.MySite.net/ReportServer/Pages/ReportViewer.aspx?/Users+Folders/User/My+Reports/Learner+Details&rs:Format=PDF&LearnerList=202307
Read these two pages, and you should be golden:
https://msdn.microsoft.com/en-us/library/ms155391.aspx
https://msdn.microsoft.com/en-us/library/ms154040.aspx
I have kept a word document (.docx) in one of the project folders which I want to use as a template.
This template contains custom header and footer lines for user. I want to facilitate user to download his own data in word format. For this, I want to write a function which will accept user data and referring the template it will create a new word file replacing the place-holders in the template and then return the new file for download (without saving it to server). That means the template needs to be intact as template.
Following is what I am trying. I was able to replace the placeholder. However, I am not aware of how to give the created content as downloadable file to user. I do not want to save the new content again in the server as another word file.
public void GenerateWord(string userData)
{
string templateDoc = HttpContext.Current.Server.MapPath("~/App_Data/Template.docx");
// Open the new Package
Package pkg = Package.Open(templateDoc, FileMode.Open, FileAccess.ReadWrite);
// Specify the URI of the part to be read
Uri uri = new Uri("/word/document.xml", UriKind.Relative);
PackagePart part = pkg.GetPart(uri);
XmlDocument xmlMainXMLDoc = new XmlDocument();
xmlMainXMLDoc.Load(part.GetStream(FileMode.Open, FileAccess.Read));
xmlMainXMLDoc.InnerXml = ReplacePlaceHoldersInTemplate(userData, xmlMainXMLDoc.InnerXml);
// Open the stream to write document
StreamWriter partWrt = new StreamWriter(part.GetStream(FileMode.Open, FileAccess.Write));
xmlMainXMLDoc.Save(partWrt);
partWrt.Flush();
partWrt.Close();
pkg.Close();
}
private string ReplacePlaceHoldersInTemplate(string toReplace, string templateBody)
{
templateBody = templateBody.Replace("#myPlaceHolder#", toReplace);
return templateBody;
}
I believe that the below line is saving the contents in the template file itself, which I don't want.
xmlMainXMLDoc.Save(partWrt);
How should I modify this code which can return the new content as downloadable word file to user?
I found the solution Here!
This code allows me to read the template file and modify it as I want and then to send response as downloadable attachment.