Update controller plugin_dbui/latex2pdf to download pdf file.

controllers/plugin_dbui.py

@@ -427,38 +427,33 @@ def latex2pdf():
     os.chdir(os.path.join(request.folder, "private"))
 
     fn = str(uuid4())
-    fi = open("%s.tex" % fn, "wb")
+    fi = open("%s.tex" % fn, "w")
     fi.write(latex_string)
     fi.close()
 
-    # convert the latex file into pdf
+    # convert the latex file into PDF
     # run latex twice for longtable, ...
     cmd = ["pdflatex", "-interaction", "nonstopmode", "%s.tex" % fn]
     call(cmd, stdout=TemporaryFile())
     call(cmd, stdout=TemporaryFile())
 
     # clean latex processing
-    for ext in ("aux", "log", "tex"):
+    for ext in ("aux", "log", "out", "tex"):
         f = "%s.%s" % (fn, ext)
         if os.path.exists(f):
             os.remove(f)
 
-    # dummy pdf if latex processing failed
+    # inform user when latex processing failed
     pdf = "%s.pdf" % fn
     if not os.path.exists(pdf):
         return "Empty PDF file since LaTeX processing failed."
 
-    # copy the pdf file into a string an clean
-    fi = open(pdf, "rb")
-    pdf_string = fi.read()
-    fi.close()
-
-    os.remove(pdf)
-
     # go back to the web2py main directory
     os.chdir(cwd)
 
-    return dict(data=pdf_string)
+    # download the PDF file
+    path_pdf = os.path.join(request.folder, "private", pdf)
+    return response.stream(path_pdf)
 
 
 def status():

views/plugin_dbui/latex2pdf.pdf

-{{
-
-    try:
-        response.headers['Content-Type']='application/pdf'
-        response.headers['Content-Disposition']='attachment;filename="latex2pdf.pdf"'
-        response.write(data, escape=False)
-
-    except:
-        raise HTML(405, T('LaTeX to PDF conversion failed.'))
-
-}}
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