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|
# -*- coding: utf-8 -*-
#
# cms.py - simple WSGI/Python based CMS script
#
# Copyright (C) 2011-2019 Michael Buesch <m@bues.ch>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#from cms.cython_support cimport * #@cy
from cms.db import *
from cms.exception import *
from cms.formfields import *
from cms.pageident import *
from cms.query import *
from cms.resolver import * #+cimport
from cms.util import * #+cimport
import functools
import PIL.Image as Image
import urllib.request, urllib.parse, urllib.error
__all__ = [
"CMS",
]
class CMS(object):
# Main CMS entry point.
__rootPageIdent = CMSPageIdent()
def __init__(self,
dbPath,
wwwPath,
imagesDir="/images",
domain="example.com",
urlBase="/cms",
cssUrlPath="/cms.css",
debug=False):
# dbPath => Unix path to the database directory.
# wwwPath => Unix path to the static www data.
# imagesDir => Subdirectory path, based on wwwPath, to
# the images directory.
# domain => The site domain name.
# urlBase => URL base component to the HTTP server CMS mapping.
# cssUrlBase => URL subpath to the CSS.
# debug => Enable/disable debugging
self.wwwPath = wwwPath
self.imagesDir = imagesDir
self.domain = domain
self.urlBase = urlBase
self.cssUrlPath = cssUrlPath
self.debug = debug
self.db = CMSDatabase(dbPath)
self.resolver = CMSStatementResolver(self)
def shutdown(self):
pass
def __genHtmlHeader(self, title, additional = ""):
header = """<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<meta name="robots" content="all" />
<meta name="date" content="%s" />
<meta name="generator" content="WSGI/%s CMS" />
<!--
Generated by "cms.py - simple CMS script"
https://bues.ch/cgit/cms.git
-->
<title>%s</title>
<link rel="stylesheet" href="%s" type="text/css" />
%s
</head>
<body>
""" % (
datetime.now().isoformat(),
"Python", #@nocy
# "Cython", #@cy
title,
self.cssUrlPath,
additional or ""
)
return header
def __genHtmlFooter(self):
footer = """
</body>
</html>
"""
return footer
def _genNavElem(self, body, basePageIdent, activePageIdent, indent=0):
if self.db.getNavStop(basePageIdent):
return
subPages = self.db.getSubPages(basePageIdent)
if not subPages:
return
tabs = '\t' + '\t' * indent
if indent > 0:
body.append('%s<div class="navelems">' % tabs)
for pagename, pagelabel, pageprio in subPages:
if not pagelabel:
continue
body.append('%s\t<div class="%s"> '
'<!-- %d -->' % (
tabs,
"navelem" if indent > 0 else "navgroup",
pageprio))
if indent <= 0:
body.append('%s\t\t<div class="navhead">' %\
tabs)
subPageIdent = CMSPageIdent(basePageIdent + [pagename])
isActive = (activePageIdent is not None and
activePageIdent.startswith(subPageIdent))
if isActive:
body.append('%s\t\t<div class="navactive">' %\
tabs)
body.append('%s\t\t<a href="%s">%s</a>' %\
(tabs,
subPageIdent.getUrl(urlBase = self.urlBase),
pagelabel))
if isActive:
body.append('%s\t\t</div> '
'<!-- class="navactive" -->' %\
tabs)
if indent <= 0:
body.append('%s\t\t</div>' % tabs)
self._genNavElem(body, subPageIdent,
activePageIdent, indent + 2)
body.append('%s\t</div>' % tabs)
if indent > 0:
body.append('%s</div>' % tabs)
def __genHtmlBody(self, pageIdent, pageTitle, pageData,
protocol,
stamp=None, genCheckerLinks=True):
body = []
# Generate logo / title bar
body.append('<div class="titlebar">')
body.append('\t<div class="logo">')
body.append('\t\t<a href="%s">' % self.urlBase)
body.append('\t\t\t<img alt="logo" src="/logo.png" />')
body.append('\t\t</a>')
body.append('\t</div>')
body.append('\t<div class="title">%s</div>' % pageTitle)
body.append('</div>\n')
# Generate navigation bar
body.append('<div class="navbar">')
body.append('\t<div class="navgroups">')
body.append('\t\t<div class="navhome">')
rootActive = not pageIdent
if rootActive:
body.append('\t\t<div class="navactive">')
body.append('\t\t\t<a href="%s">%s</a>' %\
(self.__rootPageIdent.getUrl(urlBase = self.urlBase),
self.db.getString("home")))
if rootActive:
body.append('\t\t</div> <!-- class="navactive" -->')
body.append('\t\t</div>')
self._genNavElem(body, self.__rootPageIdent, pageIdent)
body.append('\t</div>')
body.append('</div>\n')
body.append('<div class="main">\n') # Main body start
# Page content
body.append('<!-- BEGIN: page content -->')
body.append(pageData)
body.append('<!-- END: page content -->\n')
if stamp:
# Last-modified date
body.append('\t<div class="modifystamp">')
body.append(stamp.strftime('\t\tUpdated: %A %d %B %Y %H:%M (UTC)'))
body.append('\t</div>')
if protocol != "https":
# SSL
body.append('\t<div class="ssl">')
body.append('\t\t<a href="%s">%s</a>' % (
pageIdent.getUrl("https", self.domain,
self.urlBase),
self.db.getString("ssl-encrypted")))
body.append('\t</div>')
if genCheckerLinks:
# Checker links
pageUrlQuoted = urllib.parse.quote_plus(
pageIdent.getUrl("http", self.domain,
self.urlBase))
body.append('\t<div class="checker">')
checkerUrl = "http://validator.w3.org/check?"\
"uri=" + pageUrlQuoted + "&"\
"charset=%28detect+automatically%29&"\
"doctype=Inline&group=0&"\
"user-agent=W3C_Validator%2F1.2"
body.append('\t\t<a href="%s">%s</a> /' %\
(checkerUrl, self.db.getString("checker-xhtml")))
checkerUrl = "http://jigsaw.w3.org/css-validator/validator?"\
"uri=" + pageUrlQuoted + "&profile=css3&"\
"usermedium=all&warning=1&"\
"vextwarning=true&lang=en"
body.append('\t\t<a href="%s">%s</a>' %\
(checkerUrl, self.db.getString("checker-css")))
body.append('\t</div>\n')
body.append('</div>\n') # Main body end
return "\n".join(body)
@functools.lru_cache(maxsize=2**8)
def __getImageThumbnail(self, imagename, query, protocol):
if not imagename:
raise CMSException(404)
width = query.getInt("w", 300)
height = query.getInt("h", 300)
qual = query.getInt("q", 1)
qualities = {
0 : Image.NEAREST,
1 : Image.BILINEAR,
2 : Image.BICUBIC,
3 : Image.ANTIALIAS,
}
try:
qual = qualities[qual]
except (KeyError) as e:
qual = qualities[1]
try:
imgPath = fs.mkpath(self.wwwPath,
self.imagesDir,
CMSPageIdent.validateSafePathComponent(imagename))
with open(imgPath.encode("UTF-8", "strict"), "rb") as fd:
with Image.open(fd) as img:
img.thumbnail((width, height), qual)
with img.convert("RGB") as cimg:
output = BytesIO()
cimg.save(output, "JPEG")
data = output.getvalue()
except (IOError, UnicodeError) as e:
raise CMSException(404)
return data, "image/jpeg"
def __getHtmlPage(self, pageIdent, query, protocol):
pageTitle, pageData, stamp = self.db.getPage(pageIdent)
if not pageData:
raise CMSException(404)
resolverVariables = {
"PROTOCOL" : lambda r, n: protocol,
"PAGEIDENT" : lambda r, n: pageIdent.getUrl(),
"CMS_PAGEIDENT" : lambda r, n: pageIdent.getUrl(urlBase=self.urlBase),
"GROUP" : lambda r, n: pageIdent.get(0),
"PAGE" : lambda r, n: pageIdent.get(1),
}
resolve = self.resolver.resolve
for k, v in query.items():
k = k.upper()
resolverVariables["Q_" + k] = self.resolver.escape(htmlEscape(v))
resolverVariables["QRAW_" + k] = self.resolver.escape(v)
pageTitle = resolve(pageTitle, resolverVariables, pageIdent)
resolverVariables["TITLE"] = lambda r, n: pageTitle
pageData = resolve(pageData, resolverVariables, pageIdent)
extraHeader = resolve(self.db.getHeader(pageIdent),
resolverVariables, pageIdent)
data = [self.__genHtmlHeader(pageTitle, extraHeader)]
data.append(self.__genHtmlBody(pageIdent,
pageTitle, pageData,
protocol, stamp))
data.append(self.__genHtmlFooter())
try:
return ("".join(data).encode("UTF-8", "strict"),
"text/html; charset=UTF-8")
except UnicodeError as e:
raise CMSException(500, "Unicode encode error")
def __get(self, path, query, protocol):
pageIdent = CMSPageIdent.parse(path)
self.db.beginSession()
if pageIdent.get(0, allowSysNames=True) == "__thumbs":
return self.__getImageThumbnail(pageIdent.get(1), query, protocol)
return self.__getHtmlPage(pageIdent, query, protocol)
def get(self, path, query={}, protocol="http"):
query = CMSQuery(query)
return self.__get(path, query, protocol)
def __post(self, path, query, body, bodyType, protocol):
pageIdent = CMSPageIdent.parse(path)
self.db.beginSession()
postHandler = self.db.getPostHandler(pageIdent)
if postHandler is None:
raise CMSException(405)
formFields = CMSFormFields(body, bodyType)
try:
ret = postHandler(formFields, query, body, bodyType, protocol)
except CMSException as e:
raise e
except Exception as e:
msg = ""
if self.debug:
msg = " " + str(e)
msg = msg.encode("UTF-8", "ignore")
return (b"Failed to run POST handler." + msg,
"text/plain")
if ret is None:
return self.__get(path, query, protocol)
assert isinstance(ret, tuple) and len(ret) == 2, "post() return is not 2-tuple."
assert isinstance(ret[0], (bytes, bytearray)), "post()[0] is not bytes."
assert isinstance(ret[1], str), "post()[1] is not str."
return ret
def post(self, path, query={},
body=b"", bodyType="text/plain",
protocol="http"):
query = CMSQuery(query)
return self.__post(path, query, body, bodyType, protocol)
def __doGetErrorPage(self, cmsExcept, protocol):
resolverVariables = {
"PROTOCOL" : lambda r, n: protocol,
"GROUP" : lambda r, n: "_nogroup_",
"PAGE" : lambda r, n: "_nopage_",
"HTTP_STATUS" : lambda r, n: cmsExcept.httpStatus,
"HTTP_STATUS_CODE" : lambda r, n: str(cmsExcept.httpStatusCode),
"ERROR_MESSAGE" : lambda r, n: self.resolver.escape(htmlEscape(cmsExcept.message)),
}
pageHeader = cmsExcept.getHtmlHeader(self.db)
pageHeader = self.resolver.resolve(pageHeader, resolverVariables)
pageData = cmsExcept.getHtmlBody(self.db)
pageData = self.resolver.resolve(pageData, resolverVariables)
httpHeaders = cmsExcept.getHttpHeaders(
lambda s: self.resolver.resolve(s, resolverVariables))
data = [self.__genHtmlHeader(cmsExcept.httpStatus,
additional=pageHeader)]
data.append(self.__genHtmlBody(CMSPageIdent(("_nogroup_", "_nopage_")),
cmsExcept.httpStatus,
pageData,
protocol,
genCheckerLinks=False))
data.append(self.__genHtmlFooter())
return "".join(data), "text/html; charset=UTF-8", httpHeaders
def getErrorPage(self, cmsExcept, protocol="http"):
try:
data, mime, headers = self.__doGetErrorPage(cmsExcept, protocol)
except (CMSException) as e:
data = "Error in exception handler: %s %s" % \
(e.httpStatus, e.message)
mime, headers = "text/plain; charset=UTF-8", ()
try:
return data.encode("UTF-8", "strict"), mime, headers
except UnicodeError as e:
# Whoops. All is lost.
raise CMSException(500, "Unicode encode error")
|
