server: use parchemin mode for documents with type == PARCH (#3932)

server/preview_server.py

@@ -27,6 +27,34 @@ import time
 import syslog
 import socket
 import tempfile
+import zipfile
+
+try:
+    import xml.etree.ElementTree as ET
+except ImportError:
+    import elementtree.ElementTree as ET
+
+def get_legi_metadata(legi_filename):
+    try:
+        z = zipfile.ZipFile(legi_filename)
+    except zipfile.BadZipfile:
+        content = file(legi_filename).read()
+    else:
+        content_zfile = None
+        for zfile in z.namelist():
+            if zfile == 'contents.xml':
+                content_zfile = zfile
+                break
+        if content_zfile is None:
+            return None
+        content = z.read(content_zfile)
+
+    content_tree = ET.ElementTree(ET.fromstring(content))
+    metadata = {}
+    for property in content_tree.findall('metadata/property'):
+        metadata[property.attrib.get('name')] = property.text
+    return metadata
+
 
 class PreviewHandler(SCGIHandler):
     debug = False
@@ -114,7 +142,12 @@ class PreviewHandler(SCGIHandler):
                 output.write(legi_file)
                 return
 
-            if os.system('python ../legi2pdf/script/db2pdf.py --debug --latex --input=%s' % legi_filename):
+            args = ['--debug', '--latex', '--input=%s' % legi_filename]
+            metadata = get_legi_metadata(legi_filename)
+            if metadata and metadata.get('typedocid') == 'PARCH':
+                args.append('--parchemin')
+            cmd = ['python', '../legi2pdf/script/db2pdf.py'] + args
+            if os.system(' '.join(cmd)):
                 if self.daemon:
                     syslog.syslog(syslog.LOG_ERR, 'error in legi2pdf')
                 else: