Archive for Python

Render a PDF from html using xhtml2pdf and mimerender in Flask

June 21, 2013 at 5:53 pm · Topics: Programming, Python

I’m working on invoice/receipt generation for Close.io and wanted to create simple PDFs using nothing but HTML.

Using Flask, mimerender, and xhtml2pdf, here’s how:

import mimerender
mimerender.register_mime('pdf', ('application/pdf',))
mimerender = mimerender.FlaskMimeRender(global_charset='UTF-8')
def render_pdf(html):
from xhtml2pdf import pisa
from cStringIO import StringIO
pdf = StringIO()
pisa.CreatePDF(StringIO(html.encode('utf-8')), pdf)
resp = pdf.getvalue()
pdf.close()
return resp
@app.route('/invoice/<invoice_id>/', methods=['GET'])
@login_required
@mimerender(default='html', html=lambda html: html, pdf=render_pdf, override_input_key='format')
def view_invoice(org_id, invoice_id):
html = render_template('invoice.html', id=invoice_id)
return { 'html': html } # mimerender requires a dict
view raw html2pdf.py hosted with ❤ by GitHub

End of 2012 Review

January 2, 2013 at 4:06 pm · Topics: JavaScript, Personal, Programming, Python, Startups

At the end of a year I like looking back and seeing what I’ve accomplished and what new technologies I started working with in the year. Here’s a little summary.

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How to allow direct file uploads from JavaScript to Amazon S3 signed by Python

December 10, 2012 at 12:25 pm · Topics: AWS, JavaScript, Python, Startups, Web Development

On Close.io we originally implemented Filepicker.io to allow for file uploads while sending emails. While it was a quick way to get started with file uploading initially, after several minutes of downtime of their API and then an unannounced change in their JSON response format, I was reminded once again that you shouldn’t to rely on small startups for critical parts of your tech infrastructure.

There’s nothing wrong with filepicker.io if you want to use a lot of their features, but in our case we just needed to allow simple uploading of files to our own AWS S3 bucket. Here’s how:
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