Here is my way to render pdf-files with a "totalPagenumber" option:
Note: The pdf is rendered twice. This may cause problems on low-performance machines or for very big files.
The idea is to pass the number of pages from the first rendering to the second.
To do this I use this function:
from pyPdf import PdfFileReader
def genPdf(renderPageNumber=True):
filename = pdfWriter()
if renderPageNumber:
pdfFile = pdfFileReader(open(filename,'rb'))
filename = pdfWriter(' / %d'%pdfFile.numPages)
To get the number of pages of a pdf file you need the pyPdf package!
The pdfWriter function generates the pdf file:
from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.rl_config import defaultPageSize
from reportlab.lib.units import inch
def pdfWriter( totalPages='' ):
filename = 'test.pdf'
PAGE_HEIGHT=defaultPageSize[1]
PAGE_WIDTH=defaultPageSize[0]
styles = getSampleStyleSheet()
Title = "Hello world"
pageinfo = "platypus example"
def myFirstPage(canvas, doc):
canvas.saveState()
canvas.setFont('Times-Bold',16)
canvas.drawCentredString(PAGE_WIDTH/2.0, PAGE_HEIGHT-108, Title)
canvas.setFont('Times-Roman',9)
canvas.drawString(inch, 0.75 * inch,"%s: Page %d%s" % (pageinfo, doc.page, totalPages) )
canvas.restoreState()
def myLaterPages(canvas, doc):
canvas.saveState()
canvas.setFont('Times-Roman', 9)
canvas.drawString(inch, 0.75 * inch,"%s: Page %d%s" % (pageinfo, doc.page, totalPages) )
canvas.restoreState()
doc = SimpleDocTemplate(filename)
Story = [Spacer(1,2*inch)]
style = styles["Normal"]
for i in range(100):
bogustext = ("Paragraph number %s. " % i) *20
p = Paragraph(bogustext, style)
Story.append(p)
Story.append(Spacer(1,0.2*inch))
doc.build(Story, onFirstPage=myFirstPage, onLaterPages=myLaterPages)
return filename
The pdf rendering is done by the ReportLab Toolkit.
To return the pdf as responce in a django app, I use a function like this, where i render the pdf into a cStringIO. The output I add to the response in the view.
