Refactored and commented code.

cgiApp.py

@@ -0,0 +1,88 @@
+#!./.interpreter.sh
+
+import argparse
+import cgi
+import cgitb
+import os
+import sys
+from conlang import soundChangeApp, workers
+
+
+word = None
+stdin = False
+html = False
+debug = 0
+FILE_PATH = os.path.abspath(os.path.dirname(sys.argv[0]))
+
+if 'REQUEST_METHOD' in os.environ:
+    # It's being run as a cgi script
+    # Encode all non-ascii characters with xml escapes
+    sys.stdout = workers.Reencoder(sys.stdout)
+    print('Content-Type: text/html')
+    print('')
+    form = cgi.FieldStorage(encoding='utf-8')
+    word = form['word'].value
+    startd = {}
+    endd = {}
+    for f in form:
+        try:
+            # just get the number from the form key
+            n = int(f.split('-')[1])
+            v = form[f].value
+            if f[0] == 's':
+                startd[n] = v if v != ' ' else ''
+            elif f[0] == 'e':
+                endd[n] = v if v != ' ' else ''
+        except IndexError:
+            # there wasn't a '-' in f, so it wasn't a start or end key
+            continue
+    start = [v for k, v in sorted(startd.items())]
+    end = [v for k, v in sorted(endd.items())]
+    if 'debug' in form:
+        debug = int(form['debug'].value)
+    html = True
+else:
+    # It's being run from the command line
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--word', '-w')
+    parser.add_argument('--start', '-s', action='append', default=[], nargs='?')
+    parser.add_argument('--end', '-e', action='append', default=[], nargs='?')
+    parser.add_argument('--debug', '-d', type=int, default=0)
+    parser.add_argument('--html', '-t', action='store_true')
+    args = parser.parse_args()
+    word = args.word
+    if word is None:
+        # take input from stdin
+        stdin = True
+    debug = args.debug
+    if args.html:
+        # encode all non-ascii characters with xml escapes
+        sys.stdout = Reencoder(sys.stdout)
+        html = True
+    start = [x if x else '' for x in args.start]
+    end = [x if x else '' for x in args.end]
+
+if html:
+    # html formatted error messages
+    cgitb.enable()
+else:
+    # plain error messages
+    cgitb.enable(format='plain')
+
+pairs = list(zip(start, end))
+
+while True:
+    if stdin:
+        try:
+            word = input()
+        except (KeyboardInterrupt, EOFError):
+            break
+    word, db = soundChangeApp.applyRuleFiles(word, pairs, debug)
+    if html:
+        print('<pre>')
+    print(word)
+    print(db, end='')
+    if html:
+        print('</pre>')
+    if not stdin:
+        break