backend.py: Use configured delimiter for joining fields.

[chopwood] / cgi.py

diff --git a/cgi.py b/cgi.py
index 531a49cbf9df6331b9b6435476665e0bdeb82967..8009eafcd3f5abef6ee15a5c10abae9f602174a8 100644 (file)
--- a/cgi.py
+++ b/cgi.py
@@ -105,6 +105,7 @@ class HTTPOutput (O.FileOutput):
     """Constructor: initialize `headerp' flag."""
     super(HTTPOutput, me).__init__(*args, **kw)
     me.headerp = False
     """Constructor: initialize `headerp' flag."""
     super(HTTPOutput, me).__init__(*args, **kw)
     me.headerp = False

+    me.warnings = []

 
   def write(me, msg):
     """Output protocol: print a header if we've not written one already."""
 
   def write(me, msg):
     """Output protocol: print a header if we've not written one already."""


@@ -115,7 +116,7 @@ class HTTPOutput (O.FileOutput):
     """
     Print a header, if none has yet been printed.
 
     """
     Print a header, if none has yet been printed.
 

-    Keyword arguments can be passed to emit HTTP headers: see `http_header'
+    Keyword arguments can be passed to emit HTTP headers: see `http_headers'

     for the formatting rules.
     """
     if me.headerp: return
     for the formatting rules.
     """
     if me.headerp: return


@@ -123,6 +124,17 @@ class HTTPOutput (O.FileOutput):
     for h in O.http_headers(content_type = content_type, **kw):
       me.writeln(h)
     me.writeln('')
     for h in O.http_headers(content_type = content_type, **kw):
       me.writeln(h)
     me.writeln('')

+    if METHOD == 'HEAD':
+      HEADER_DONE()
+
+  def warn(me, msg):
+    """
+    Report a warning message.
+
+    The warning is stashed in a list where it can be retrieved using
+    `warnings'.
+    """
+    me.warnings.append(msg)

 
 def cookie(name, value, **kw):
   """
 
 def cookie(name, value, **kw):
   """


@@ -197,7 +209,8 @@ def set_template_keywords():
     package = PACKAGE,
     version = VERSION,
     script = CFG.SCRIPT_NAME,
     package = PACKAGE,
     version = VERSION,
     script = CFG.SCRIPT_NAME,

-    static = CFG.STATIC)
+    static = CFG.STATIC,
+    allowop = CFG.ALLOWOP)

 
 class TemplateFinder (object):
   """
 
 class TemplateFinder (object):
   """


@@ -212,7 +225,7 @@ class TemplateFinder (object):
     with open(OS.path.join(me._dir, key)) as f: tmpl = f.read()
     me._cache[key] = tmpl
     return tmpl
     with open(OS.path.join(me._dir, key)) as f: tmpl = f.read()
     me._cache[key] = tmpl
     return tmpl

-TMPL = TemplateFinder(TMPLDIR)
+STATE.kw['TMPL'] = TMPL = TemplateFinder(TMPLDIR)

 
 @CTX.contextmanager
 def tmplkw(**kw):
 
 @CTX.contextmanager
 def tmplkw(**kw):


@@ -230,13 +243,36 @@ class FormatHTML (F.SimpleFormatOperation):
   """
   ~H: escape output suitable for inclusion in HTML.
 
   """
   ~H: escape output suitable for inclusion in HTML.
 

-  With `:', instead apply form-urlencoding.
+  With `:', additionally apply quotification.

   """
   def _convert(me, arg):
     if me.colonp: return html_quotify(arg)
     else: return htmlescape(arg)
 FORMATOPS['H'] = FormatHTML
 
   """
   def _convert(me, arg):
     if me.colonp: return html_quotify(arg)
     else: return htmlescape(arg)
 FORMATOPS['H'] = FormatHTML
 

+class FormatWrap (F.BaseFormatOperation):
+  """
+  ~<...~@>: wrap enclosed material in another formatting control string.
+
+  The argument is a formatting control.  The enclosed material is split into
+  pieces separated by `~;' markers.  The formatting control is performed, and
+  passed the list of pieces (as compiled formatting operations) in the
+  keyword argument `wrapped'.
+  """
+  def __init__(me, *args):
+    super(FormatWrap, me).__init__(*args)
+    pieces = []
+    while True:
+      piece, delim = F.collect_subformat('>;')
+      pieces.append(piece)
+      if delim.char == '>': break
+    me.pieces = pieces
+  def _format(me, atp, colonp):
+    op = F.compile(me.getarg.get())
+    with F.FORMAT.bind(argmap = dict(F.FORMAT.argmap, wrapped = me.pieces)):
+      op.format()
+FORMATOPS['<'] = FormatWrap
+

 def format_tmpl(control, **kw):
   with F.COMPILE.bind(opmaps = [FORMATOPS, F.BASEOPS]):
     with tmplkw(**kw):
 def format_tmpl(control, **kw):
   with F.COMPILE.bind(opmaps = [FORMATOPS, F.BASEOPS]):
     with tmplkw(**kw):


@@ -246,7 +282,8 @@ def page(template, header = {}, title = 'Chopwood', **kw):
   header = dict(header, content_type = 'text/html')
   OUT.header(**header)
   format_tmpl(TMPL['wrapper.fhtml'],
   header = dict(header, content_type = 'text/html')
   OUT.header(**header)
   format_tmpl(TMPL['wrapper.fhtml'],

-              title = title, payload = TMPL[template], **kw)
+              title = title, warnings = OUT.warnings,
+              payload = TMPL[template], **kw)

 
 ###--------------------------------------------------------------------------
 ### Error reporting.
 
 ###--------------------------------------------------------------------------
 ### Error reporting.


@@ -287,12 +324,14 @@ def cgi_errors(hook = None):
 ### CGI input.
 
 ## Lots of global variables to be filled in by `cgiparse'.
 ### CGI input.
 
 ## Lots of global variables to be filled in by `cgiparse'.

+METHOD = None

 COOKIE = {}
 SPECIAL = {}
 PARAM = []
 PARAMDICT = {}
 PATH = []
 SSLP = False
 COOKIE = {}
 SPECIAL = {}
 PARAM = []
 PARAMDICT = {}
 PATH = []
 SSLP = False

+HEADER_DONE = lambda: None

 
 ## Regular expressions for splitting apart query and cookie strings.
 R_QSPLIT = RX.compile('[;&]')
 
 ## Regular expressions for splitting apart query and cookie strings.
 R_QSPLIT = RX.compile('[;&]')


@@ -353,34 +392,35 @@ def cgiparse():
         True if the client connection is carried over SSL or TLS.
   """
 
         True if the client connection is carried over SSL or TLS.
   """
 

-  global SSLP
+  global METHOD, SSLP

 
   def getenv(var):
     try: return ENV[var]
     except KeyError: raise U.ExpectedError, (500, "No `%s' supplied" % var)
 
   ## Yes, we want the request method.
 
   def getenv(var):
     try: return ENV[var]
     except KeyError: raise U.ExpectedError, (500, "No `%s' supplied" % var)
 
   ## Yes, we want the request method.

-  method = getenv('REQUEST_METHOD')
+  METHOD = getenv('REQUEST_METHOD')

 
   ## Acquire the query string.
 
   ## Acquire the query string.

-  if method == 'GET':
-    q = getenv('QUERY_STRING')
+  if METHOD in ['GET', 'HEAD']:
+    q = ENV.get('QUERY_STRING', '')

 
 

-  elif method == 'POST':
+  elif METHOD == 'POST':

 
     ## We must read the query string from stdin.
     n = getenv('CONTENT_LENGTH')
     if not n.isdigit():
       raise U.ExpectedError, (500, "Invalid CONTENT_LENGTH")
     n = int(n, 10)
 
     ## We must read the query string from stdin.
     n = getenv('CONTENT_LENGTH')
     if not n.isdigit():
       raise U.ExpectedError, (500, "Invalid CONTENT_LENGTH")
     n = int(n, 10)

-    if getenv('CONTENT_TYPE') != 'application/x-www-form-urlencoded':
+    ct = getenv('CONTENT_TYPE')
+    if ct != 'application/x-www-form-urlencoded':

       raise U.ExpectedError, (500, "Unexpected content type `%s'" % ct)
     q = SYS.stdin.read(n)
     if len(q) != n:
       raise U.ExpectedError, (500, "Failed to read correct length")
 
   else:
       raise U.ExpectedError, (500, "Unexpected content type `%s'" % ct)
     q = SYS.stdin.read(n)
     if len(q) != n:
       raise U.ExpectedError, (500, "Failed to read correct length")
 
   else:

-    raise U.ExpectedError, (500, "Unexpected request method `%s'" % method)
+    raise U.ExpectedError, (500, "Unexpected request method `%s'" % METHOD)

 
   ## Populate the `SPECIAL', `PARAM' and `PARAMDICT' tables.
   seen = set()
 
   ## Populate the `SPECIAL', `PARAM' and `PARAMDICT' tables.
   seen = set()


@@ -390,7 +430,8 @@ def cgiparse():
     else:
       PARAM.append((k, v))
       if k in seen:
     else:
       PARAM.append((k, v))
       if k in seen:

-        del PARAMDICT[k]
+        try: del PARAMDICT[k]
+        except KeyError: pass

       else:
         PARAMDICT[k] = v
         seen.add(k)
       else:
         PARAMDICT[k] = v
         seen.add(k)


@@ -424,6 +465,11 @@ class Subcommand (SC.Subcommand):
   CGI parameters.
   """
 
   CGI parameters.
   """
 

+  def __init__(me, name, contexts, desc, func,
+               methods = ['GET', 'POST'], *args, **kw):
+    super(Subcommand, me).__init__(name, contexts, desc, func, *args, **kw)
+    me.methods = set(methods)
+

   def cgi(me, param, path):
     """
     Invoke the subcommand given a collection of CGI parameters.
   def cgi(me, param, path):
     """
     Invoke the subcommand given a collection of CGI parameters.


@@ -440,6 +486,8 @@ class Subcommand (SC.Subcommand):
     the list of path elements is non-empty.
     """
 
     the list of path elements is non-empty.
     """
 

+    global HEADER_DONE
+

     ## We're going to make a pass over the supplied parameters, and we'll
     ## check them off against the formal parameters as we go; so we'll need
     ## to be able to look them up.  We'll also keep track of the ones we've
     ## We're going to make a pass over the supplied parameters, and we'll
     ## check them off against the formal parameters as we go; so we'll need
     ## to be able to look them up.  We'll also keep track of the ones we've


@@ -453,6 +501,12 @@ class Subcommand (SC.Subcommand):
     want = {}
     kw = {}
 
     want = {}
     kw = {}
 

+    ## Check the request method against the permitted list.
+    meth = METHOD
+    if meth == 'HEAD': meth = 'GET'
+    if meth not in me.methods:
+      raise U.ExpectedError, (500, "Unexpected request method `%s'" % METHOD)
+

     def set_value(k, v):
       """Set a simple value: we shouldn't see multiple values."""
       if k in kw:
     def set_value(k, v):
       """Set a simple value: we shouldn't see multiple values."""
       if k in kw: