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Question

 Kuresh Surury (Kuresh_Surury) Endeavour Energy Solution Architect
Endeavour Energy
AU
Kuresh_Surury Member since 2013 5 posts
Endeavour Energy
Posted: Sep 20, 2016
Last activity: Jul 11, 2017
Posted: 20 Sep 2016 7:30 EDT
Last activity: 11 Jul 2017 1:24 EDT
Closed
Solved

Embedding Images in pdf using pd4ml

We have a specific requirement to have separate header and footer in document for first Page and rest of the document

So we have used pd4ml inline tags to achieve the same

<pd4ml:page.header pagesToSkip='0' areaHeight='180' scope='1'>
<pega:include name = "DocumentHeaderLogo.Mail"  type="Rule-Obj-Corr" />
</pd4ml:page.header>

<pd4ml:page.footer pagesToSkip='0' areaHeight='150' scope='1'>
 <pega:include name = "FooterTemplate.Mail"  type="Rule-Obj-Corr" />
  <p align="center">Page $[page] </p>
</pd4ml:page.footer>
  

<html>
<head>
<h1>Title</h1>  
</head>
<body>


  
 <BR>

  <pd4ml:page.header pagesToSkip='1' areaHeight='-1'>  
</pd4ml:page.header>
    
<pd4ml:page.footer pagesToSkip='1' areaHeight='-1'>
<p align="center">Page $[page] </p>
  
<BR></pd4ml:page.footer> 
  
   ReplaceContent
   
 
  
</body>
</html>

While generating the document we are facing one problem

Images are not getting embedded in generated document if we pass relative path as below

<img src="images/logo.gif">

But if we use below Tag it is embedding the image

<img src="data:image/gif;base64,R0lGODlhkwAYAPcAAA.....DCkFAADs=">

Show More

We have a specific requirement to have separate header and footer in document for first Page and rest of the document

So we have used pd4ml inline tags to achieve the same

<pd4ml:page.header pagesToSkip='0' areaHeight='180' scope='1'>
<pega:include name = "DocumentHeaderLogo.Mail"  type="Rule-Obj-Corr" />
</pd4ml:page.header>

<pd4ml:page.footer pagesToSkip='0' areaHeight='150' scope='1'>
 <pega:include name = "FooterTemplate.Mail"  type="Rule-Obj-Corr" />
  <p align="center">Page $[page] </p>
</pd4ml:page.footer>
  

<html>
<head>
<h1>Title</h1>  
</head>
<body>


  
 <BR>

  <pd4ml:page.header pagesToSkip='1' areaHeight='-1'>  
</pd4ml:page.header>
    
<pd4ml:page.footer pagesToSkip='1' areaHeight='-1'>
<p align="center">Page $[page] </p>
  
<BR></pd4ml:page.footer> 
  
   ReplaceContent
   
 
  
</body>
</html>

While generating the document we are facing one problem

Images are not getting embedded in generated document if we pass relative path as below

<img src="images/logo.gif">

But if we use below Tag it is embedding the image

<img src="data:image/gif;base64,R0lGODlhkwAYAPcAAA.....DCkFAADs=">

Java code to render the document is as below(we are not using pega wrapper class to invoke pd4ml library in this scenario as we need to set sepcific margin for the document)

try{  
  
String sContent=sHtml;  
  
org.zefer.pd4ml.PD4ML pd4ml = new org.zefer.pd4ml.PD4ML();  
pd4ml.enableDebugInfo();  
pd4ml.setPageInsetsMM(new java.awt.Insets(24, 24, 12, 24));  
java.io.ByteArrayOutputStream os=new java.io.ByteArrayOutputStream();  
java.io.InputStream is=new java.io.ByteArrayInputStream(sContent.getBytes());  
java.io.InputStreamReader ris=new java.io.InputStreamReader(is);  
pd4ml.render(ris,os);  
  
byte[] byteArray=os.toByteArray();  
tools.putParamValue("PDFDocument",byteArray);  
  
}catch(Exception e){  
  
  throw new PRRuntimeException(e.toString());  
}

I have attached the html and generated pdf when we are using relative path(Decision pdf and generatedstream.txt) as compared to hardcoded image base64 content(test pdf and hardcodedcontenthtml)

Is there a way to resolve the issue and embedded image using relative path instead of hardocding base64 content

***Updated by Moderator: Marissa. Removed user added Ask the Expert group tag. Apologies for confusion, shouldn't have been an end-user option; updated categories***


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User Experience

Accepted Solution

Posted: 8 years ago
Posted: 3 Oct 2016 22:51 EDT
Kuresh Surury (Kuresh_Surury) Endeavour Energy Solution Architect
Endeavour Energy
AU

There were two problems to be resolved:

  • Base URL – The system needs to know which base URL is to be used to resolve references like “images/myimage.gif”.
  • Authentication – Images are served as part of a session and therefore the URL request to retrieve its content should go with session cookies.

Base URL

The first problem is resolved adding the following code:

This will set a value similar to http://localhost:8080/prweb/PRServlet/hxkxn3ncFZZbeOouc6lRmtRtK9UYzh1lECXN0QB_UwQ%5B*/

In the Java code, We have update the call to api with below 2 lines

java.net.URL base=new java.net.URL(BASEURL); 

pd4ml.render(ris,os,base);

 

 

Authentication

​The request for the image should have a session. We have used following to pass the session context to the request:

pd4ml.setCookie("JSESSIONID",JSESSIONID);
pd4ml.setCookie("Pega-RULES",PEGARULES);

After these changes, I was able to render a PDF with references like:

<img src="icons/jigsaw.gif"/>  

 

Show More

There were two problems to be resolved:

  • Base URL – The system needs to know which base URL is to be used to resolve references like “images/myimage.gif”.
  • Authentication – Images are served as part of a session and therefore the URL request to retrieve its content should go with session cookies.

Base URL

The first problem is resolved adding the following code:

This will set a value similar to http://localhost:8080/prweb/PRServlet/hxkxn3ncFZZbeOouc6lRmtRtK9UYzh1lECXN0QB_UwQ%5B*/

In the Java code, We have update the call to api with below 2 lines

java.net.URL base=new java.net.URL(BASEURL); 

pd4ml.render(ris,os,base);

 

 

Authentication

​The request for the image should have a session. We have used following to pass the session context to the request:

pd4ml.setCookie("JSESSIONID",JSESSIONID);
pd4ml.setCookie("Pega-RULES",PEGARULES);

After these changes, I was able to render a PDF with references like:

<img src="icons/jigsaw.gif"/>  

 

This works if the server has access to itself using the pxReqBaseURI, which does not need to be always true. For example, if there is a load balancer (which is the case in Pega Cloud), the pxReqBaseURI will contain the public URL of the load balancer. The Pega server does not necessarily have access to itself through that URL – it could even happen that it hits the loadbalancer and it is redirected to another server where the session is not valid. In order to avoid this problem, We trying to access server  through https://localhost/ … but it has to be tested (there could be problem with certificates, etc.).So we  need to make sure the Pega server is able to talk to itself to avoid issue with certificates and f5

 


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Posted: 8 years ago
Posted: 21 Sep 2016 9:45 EDT
Santanu Bhattacherjee (Santanu) Senior Manager, Cloud Engineering, Management Plane Services
Pegasystems Inc.
IN

Hi

It might need further investigation based on tracer and fiddler. Can you trace and find the difference between working and not working. 

Also, try to track the request and resposne via  fiddler  and share the difference. 

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Accepted Solution

Posted: 8 years ago
Posted: 3 Oct 2016 22:51 EDT
Kuresh Surury (Kuresh_Surury) Endeavour Energy Solution Architect
Endeavour Energy
AU

There were two problems to be resolved:

  • Base URL – The system needs to know which base URL is to be used to resolve references like “images/myimage.gif”.
  • Authentication – Images are served as part of a session and therefore the URL request to retrieve its content should go with session cookies.

Base URL

The first problem is resolved adding the following code:

This will set a value similar to http://localhost:8080/prweb/PRServlet/hxkxn3ncFZZbeOouc6lRmtRtK9UYzh1lECXN0QB_UwQ%5B*/

In the Java code, We have update the call to api with below 2 lines

java.net.URL base=new java.net.URL(BASEURL); 

pd4ml.render(ris,os,base);

 

 

Authentication

​The request for the image should have a session. We have used following to pass the session context to the request:

pd4ml.setCookie("JSESSIONID",JSESSIONID);
pd4ml.setCookie("Pega-RULES",PEGARULES);

After these changes, I was able to render a PDF with references like:

<img src="icons/jigsaw.gif"/>  

 

Show More

There were two problems to be resolved:

  • Base URL – The system needs to know which base URL is to be used to resolve references like “images/myimage.gif”.
  • Authentication – Images are served as part of a session and therefore the URL request to retrieve its content should go with session cookies.

Base URL

The first problem is resolved adding the following code:

This will set a value similar to http://localhost:8080/prweb/PRServlet/hxkxn3ncFZZbeOouc6lRmtRtK9UYzh1lECXN0QB_UwQ%5B*/

In the Java code, We have update the call to api with below 2 lines

java.net.URL base=new java.net.URL(BASEURL); 

pd4ml.render(ris,os,base);

 

 

Authentication

​The request for the image should have a session. We have used following to pass the session context to the request:

pd4ml.setCookie("JSESSIONID",JSESSIONID);
pd4ml.setCookie("Pega-RULES",PEGARULES);

After these changes, I was able to render a PDF with references like:

<img src="icons/jigsaw.gif"/>  

 

This works if the server has access to itself using the pxReqBaseURI, which does not need to be always true. For example, if there is a load balancer (which is the case in Pega Cloud), the pxReqBaseURI will contain the public URL of the load balancer. The Pega server does not necessarily have access to itself through that URL – it could even happen that it hits the loadbalancer and it is redirected to another server where the session is not valid. In order to avoid this problem, We trying to access server  through https://localhost/ … but it has to be tested (there could be problem with certificates, etc.).So we  need to make sure the Pega server is able to talk to itself to avoid issue with certificates and f5

 


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