Databases
StackOverflow2013
Postsdbo
POConvert html to pdf on the fly using Python and HTMLDOC
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POConvert html to pdf on the fly using Python and HTMLDOC
    primarykey
    data
    text
    <p>I built a Django application for a client about a year ago. He has now resold the application to some super secret government agency that they won't even tell me the name of. </p> <p>Part of the application dynamically generates PDF files using the python library xhtml2pdf (pisa). The Government doesn't like this library, they won't tell me why, they said I have to use <a href="https://www.msweet.org/projects.php?Z1" rel="nofollow">HTMLDOC</a> for pdf generation.</p> <p>There's not much documentation on this library, but from reading the PHP example, it looks like you can just communicate with it through the shell, so it should work with Python. However, I'm having a hard time passing the html to HTMLDOC. It looks like HTMLDOC will only accept a file, but I really need to pass the html as a string since it's dynamically generated. (Or write the html string to a temporary file and then pass that temporary file to HTMLDOC).</p> <p>I thought StringIO would work for this, but I'm getting an error. Here's what I have:</p> <pre><code>def render_to_pdf(template_src, context_dict): template = get_template(template_src) context = Context(context_dict) html = template.render(context) result = StringIO.StringIO(html.encode("utf-8")) os.putenv("HTMLDOC_NOCGI", "1") #this line throws "[Errno 2] No such file or directory" htmldoc = subprocess.Popen("htmldoc -t pdf --quiet '%s'" % result, stdout=subprocess.PIPE).communicate() pdf = htmldoc[0] result.close() return HttpResponse(pdf, mimetype='application/pdf') </code></pre> <p>Any ideas, tips, or help would be really appreciated.</p> <p>Thanks.</p> <p><strong>UPDATE</strong></p> <p>Stack Trace:</p> <pre><code>Environment: Request Method: GET Request URL: (redacted) Django Version: 1.3 alpha 1 SVN-14921 Python Version: 2.6.5 Installed Applications: ['django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.admin', 'application'] Installed Middleware: ('django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware') Traceback: File "/usr/local/lib/python2.6/dist-packages/django/core/handlers/base.py" in get_response 111. response = callback(request, *callback_args, **callback_kwargs) File "/usr/local/lib/python2.6/dist-packages/django/contrib/auth/decorators.py" in _wrapped_view 23. return view_func(request, *args, **kwargs) File "/home/ascgov/application/views/pdf.py" in application_pdf 90. 'user':owner}) File "/home/ascgov/application/views/pdf.py" in render_to_pdf 53. htmldoc = subprocess.Popen("/usr/bin/htmldoc -t pdf --quiet '%s'" % result, stdout=subprocess.PIPE).communicate() File "/usr/lib/python2.6/subprocess.py" in __init__ 633. errread, errwrite) File "/usr/lib/python2.6/subprocess.py" in _execute_child 1139. raise child_exception Exception Type: OSError at /pdf/application/feed-filtr/ Exception Value: [Errno 2] No such file or directory </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USNick Hagianis
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POConvert html to pdf on the fly using Python and HTMLDOC
      1. USdani herrera
      1. VTFavorite
    2. VO
      singulars
      1. POConvert html to pdf on the fly using Python and HTMLDOC
      1. USJingo
      1. VTFavorite
    1. COHave you tried to specify the absolute path to the `htmldoc` executable, e.g. `/usr/local/bin/htmldoc`?
      singulars
      1. POConvert html to pdf on the fly using Python and HTMLDOC
      1. USmiku
    2. COGood suggestion. Tried it and I'm still getting "[Errno 2] No such file or directory". Thanks though.
      singulars
      1. POConvert html to pdf on the fly using Python and HTMLDOC
      1. USNick Hagianis
    3. CO`Errno 2` suggests strongly, that there's no problem on the python side, but on the shell/callout side. (btw, if you want a nice wrapper around `subprocess`, take a look at [envoy](https://github.com/kennethreitz/envoy))
      singulars
      1. POConvert html to pdf on the fly using Python and HTMLDOC
      1. USmiku
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload