switch from slimer.js and firefox to weasyprint for rendering html to pdf

screenless/bureau/bureau.py

@@ -14,6 +14,7 @@ import threading
 
 import lmdb
 import PIL
+import weasyprint
 import zmq
 from escpos import printer
 from mako.template import Template
@@ -149,11 +150,11 @@ class Bureau(object):
         self.api = {}
 
         modpath = os.path.dirname(__file__)
-        slimerjs = os.path.join(modpath, "..", "lib", "slimerjs", "slimerjs")
-        renderer = os.path.join(modpath, "..", "slimerjs", "rasterize.js")
-        self.slimerjs = os.path.abspath(slimerjs)
-        self.html2pdf = self.slimerjs + " --headless " + \
-                        os.path.abspath(renderer) + " "
+        #slimerjs = os.path.join(modpath, "..", "lib", "slimerjs", "slimerjs")
+        #renderer = os.path.join(modpath, "..", "slimerjs", "rasterize.js")
+        #self.slimerjs = os.path.abspath(slimerjs)
+        #self.html2pdf = self.slimerjs + " --headless " + \
+        #                os.path.abspath(renderer) + " "
         mypath = inspect.getfile(self.__class__)
         self.mdir = os.path.dirname(mypath)
 
@@ -316,14 +317,14 @@ class Bureau(object):
 
         # lpname = kwargs.get("printer", "default")
 
-        htmlfile, htmlpath = tempfile.mkstemp(".html")
-        htmlfile = os.fdopen(htmlfile, "w")
+        #htmlfile, htmlpath = tempfile.mkstemp(".html")
+        #htmlfile = os.fdopen(htmlfile, "w")
         # run template with kwargs
         templfile = os.path.join(self.mdir, template)
         self.log.debug("printing with template: %s", templfile)
         templ = Template(filename=templfile, strict_undefined=True)
-        htmlfile.write(templ.render_unicode(**kwargs))
-        htmlfile.close()
+        #htmlfile.write(templ.render_unicode(**kwargs))
+        #htmlfile.close()
         #.encode('utf-8',
         #                                                     'replace'))
 
@@ -338,8 +339,9 @@ class Bureau(object):
         # TODO: make paper size a config variable
         pdfpath = tempfile.mkstemp(".pdf")[1]
         self.log.debug("rendering with: " + self.html2pdf + htmlpath + " " + pdfpath)
-        subprocess.call(self.html2pdf + htmlpath + " " + pdfpath +
-                        " A4 1920px", shell=True)
+        weasyprint.HTML(string=templ.render_unicode(**kwargs)).write_pdf(pdfpath)
+        #subprocess.call(self.html2pdf + htmlpath + " " + pdfpath +
+        #                " A4 1920px", shell=True)
         subprocess.call("lpr -o sides=two-sided-long-edge -o InputSlot=Upper " + pdfpath, shell=True)
 
     # TODO: make this asynchronous