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import os
import re
from pathlib import Path
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from sys import getfilesystemencoding as sys_getfilesystemencoding
from urllib . parse import unquote as urlunquote
from urllib . parse import urljoin
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import django . forms as forms
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from django . http import HttpResponse , HttpResponseRedirect
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from django . shortcuts import redirect , render
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from django . urls import reverse
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from django . views . decorators . csrf import ensure_csrf_cookie
import troggle . core . views . caves
import troggle . settings as settings
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from troggle . core . models . caves import Cave
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from troggle . core . utils import WriteAndCommitError , write_and_commit
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from troggle . core . views . editor_helpers import HTMLarea
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from . auth import login_required_if_public
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""" Formerly a separate package called ' flatpages ' written by Martin Green 2011.
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This was NOT django . contrib . flatpages which stores HTML in the database , so the name was changed to expopages .
Then it was incorporated into troggle directly , rather than being an unnecessary external package .
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"""
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default_head = """ <head>
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< meta http - equiv = " Content-Type " content = " text/html; charset=iso-8859-1 " / >
< title > CUCC Expedition - index < / title >
< link rel = " stylesheet " type = " text/css " href = " ../css/main2.css " / >
< link rel = " stylesheet " type = " text/css " href = " ../../css/main2.css " / >
< link rel = " stylesheet " type = " text/css " href = " ../../../css/main2.css " / >
< / head >
< body >
< h1 > Expo < / h1 >
< h2 id = " tophead " > CUCC Expedition < / h2 >
< ul id = " links " >
< li > < a href = " /index.htm " > Home < / a > < / li >
< li > < a href = " /infodx.htm " > Main Index < / a > < / li >
< li > < a href = " /handbook/index.htm " > Handbook < / a > < / li >
< li > < a href = " /handbook/computing/onlinesystems.html " > Online systems < / a > < / li >
< li > < a href = " /pubs.htm " > Reports < / a > < / li >
< li > < a href = " /areas.htm " > Areas < / a > < / li >
< li > < a href = " /caves " > Caves < / a > < / li >
< li > < a href = " /expedition/2019 " > Troggle < / a > < / li >
< li > < form name = P method = get action = " /search " target = " _top " >
< input id = " omega-autofocus " type = search name = P size = 8 autofocus >
< input type = submit value = " Search " > < / li >
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< / ul > """ # this gets overwritten by templates/menu.html by django for most normal pages
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def expofiles_redirect ( request , filepath ) :
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""" This is used only when running as a test system without a local copy of /expofiles/
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when settings . EXPOFILESREMOTE is True
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"""
return redirect ( urljoin ( " http://expo.survex.com/expofiles/ " , filepath ) )
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def spider ( request , _ ) :
return redirect ( " /?# " ) # so that suffixes applied by spider are no longer part of the url
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def map ( request ) :
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""" Serves unadorned the expoweb/map/map.html file """
fn = Path ( settings . EXPOWEB , " map " , " map.html " )
return HttpResponse ( content = open ( fn , " r " ) , content_type = " text/html " )
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def mapfile ( request , path ) :
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""" Serves unadorned file """
fn = Path ( settings . EXPOWEB , " map " , path )
return HttpResponse ( content = open ( fn , " r " ) , content_type = getmimetype ( fn ) )
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def expofilessingle ( request , filepath ) :
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""" sends a single binary file to the user, if not found, show the parent directory
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If the path actually is a directory , then show that .
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"""
# print(f' - expofilessingle {filepath}')
if filepath == " " or filepath == " / " :
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return expofilesdir ( request , settings . EXPOFILES , " " )
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fn = urlunquote ( filepath )
fn = Path ( settings . EXPOFILES , filepath )
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if fn . is_dir ( ) :
return expofilesdir ( request , Path ( fn ) , Path ( filepath ) )
if fn . is_file ( ) :
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return HttpResponse ( content = open ( fn , " rb " ) , content_type = getmimetype ( filepath ) ) # any file
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else :
# not a file, so show parent directory - DANGER need to check this is limited to below expofiles
if Path ( fn ) . parent == Path ( settings . EXPOFILES ) . parent :
return expofilesdir ( request , Path ( settings . EXPOFILES ) , Path ( filepath ) . parent )
else :
return expofilesdir ( request , Path ( fn ) . parent , Path ( filepath ) . parent )
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def expofilesdir ( request , dirpath , filepath ) :
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""" does a directory display. If there is an index.html file we should display that.
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- dirpath is a full Path ( ) resolved including local machine / expofiles /
- filepath is a Path ( ) and it does not have / expofiles / in it
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"""
# print(f' - expofilesdir {dirpath} settings.EXPOFILESREMOTE: {settings.EXPOFILESREMOTE}')
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if filepath :
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urlpath = " expofiles " / Path ( filepath )
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else :
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urlpath = Path ( " expofiles " )
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try :
for f in dirpath . iterdir ( ) :
pass
except FileNotFoundError :
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# print(f' - expofilesdir error {dirpath}')
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return expofilesdir ( request , dirpath . parent , filepath . parent )
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fileitems = [ ]
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diritems = [ ]
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for f in dirpath . iterdir ( ) :
if f . is_dir ( ) :
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diritems . append ( ( urlpath / f . parts [ - 1 ] , str ( f . parts [ - 1 ] ) ) )
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else :
# if f.parts[-1].lower() == 'index.htm' or f.parts[-1].lower() == 'index.html': # css cwd problem
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# return HttpResponse(content=open(f, "rb"),content_type=getmimetype(filepath)) # any file
# return expofilessingle(request, str(Path(filepath / f.parts[-1])))
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fileitems . append ( ( Path ( urlpath ) / f . parts [ - 1 ] , str ( f . parts [ - 1 ] ) , getmimetype ( f ) ) )
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return render (
request ,
" dirdisplay.html " ,
{ " filepath " : urlpath , " fileitems " : fileitems , " diritems " : diritems , " settings " : settings } ,
)
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def expowebpage ( request , expowebpath , path ) :
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""" Adds menus and serves an HTML page """
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if not os . path . isfile ( expowebpath / path ) :
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# Should not get here if the path has suffix "_edit"
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print ( f " - 404 error in expowebpage() { path } " )
return render ( request , " pagenotfound.html " , { " path " : path } , status = " 404 " )
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# print(f' - {sys_getfilesystemencoding()=}')
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if sys_getfilesystemencoding ( ) != " utf-8 " :
return HttpResponse (
default_head
+ " <h3>UTF-8 Parsing Failure:<br>Default file encoding on this Troggle installation is not UTF-8:<br>failure detected in expowebpage in views.expo.py</h3> Please Please reconfigure Debian/Apache/Django to fix this, i.e. contact Wookey. </body "
)
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# This next bit can be drastically simplified now that we know that the system encoding actually is utf-8
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try :
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with open ( expowebpath / path , " r " , encoding = " utf-8 " ) as o :
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html = o . read ( )
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except :
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# exception raised on debian with python 3.9.2 but not on WSL Ubuntu with python 3.9.5
# because debian was assuming default text encoding was 'ascii'. Now specified explicitly so should be OK
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try :
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with open ( expowebpath / path , " rb " ) as o :
html = str ( o . read ( ) ) . replace ( " <h1> " , " <h1>BAD NON-UTF-8 characters here - " )
html = html . replace ( " \\ n " , " \n " )
html = html . replace ( " \\ r " , " " )
html = html . replace ( " \\ t " , " \t " )
html = html . replace ( " \\ ' " , " ' " )
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except :
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return HttpResponse (
default_head
+ " <h3>UTF-8 Parsing Failure:<br>Page could not be parsed using UTF-8:<br>failure detected in expowebpage in views.expo.py</h3> Please edit this <var>:expoweb:</var> page to replace dubious umlauts and £ symbols with correct HTML entities e.g. <em>&pound;;</em>. </body "
)
m = re . search (
r " (.*)< \ s*head([^>]*)>(.*)< \ s*/head \ s*>(.*)< \ s*body([^>]*)>(.*)< \ s*/body \ s*>(.*) " ,
html ,
re . DOTALL + re . IGNORECASE ,
)
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if m :
preheader , headerattrs , head , postheader , bodyattrs , body , postbody = m . groups ( )
else :
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return HttpResponse (
default_head
+ html
+ " <h3>HTML Parsing failure:<br>Page could not be parsed into header and body:<br>failure detected in expowebpage in views.expo.py</h3> Please edit this <var>:expoweb:</var> page to be in the expected full HTML format </body "
)
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m = re . search ( r " <title>(.*)</title> " , head , re . DOTALL + re . IGNORECASE )
if m :
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( title , ) = m . groups ( )
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else :
title = " "
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m = re . search ( r " noedit " , head , re . DOTALL + re . IGNORECASE )
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if m :
editable = False
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# print(f"NOEDIT set")
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else :
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editable = os . access ( expowebpath / path , os . W_OK ) # are file permissions writeable?
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# print(f"EDITABLE ? {editable}\n{head}")
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has_menu = False
menumatch = re . match ( r ' (.*)<ul id= " links " > ' , body , re . DOTALL + re . IGNORECASE )
if menumatch :
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has_menu = False
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# Determine which caves this page relates to
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m = re . search ( r " (162 \ d \ /[^ \ /]+)[ \ / \ .] " , path , re . DOTALL + re . IGNORECASE )
if m :
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( path_start , ) = m . groups ( )
parent_caves = Cave . objects . filter ( url__startswith = path_start )
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else :
parent_caves = None
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# Determine if this page relates to a particular year
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m = re . search ( r " years \ /( \ d \ d \ d \ d) \ /.* " , path , re . DOTALL + re . IGNORECASE )
if m :
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( year , ) = m . groups ( )
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else :
year = None
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# Determine if this page is part of the handbook
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handbook = path . startswith ( " handbook " )
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return render (
request ,
" expopage.html " ,
{
" editable " : editable ,
" path " : path ,
" title " : title ,
" body " : body ,
" homepage " : ( path == " index.htm " ) ,
" has_menu " : has_menu ,
" year " : year ,
" handbook " : handbook ,
" parent_caves " : parent_caves ,
} ,
)
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def mediapage ( request , subpath = None , doc_root = None ) :
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""" This is for special prefix paths /photos/ /site_media/, /static/ etc.
as defined in urls . py . If given a directory , gives a failure page .
"""
# print(" - XXXXX_ROOT: {} ...{}".format(doc_root, subpath))
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if doc_root is not None :
filetobeopened = Path ( doc_root , subpath )
if filetobeopened . is_dir ( ) :
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return render ( request , " nodirlist.html " , { " path " : subpath } )
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try :
return HttpResponse ( content = open ( filetobeopened , " rb " ) , content_type = getmimetype ( subpath ) )
except IOError :
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return render ( request , " pagenotfound.html " , { " path " : subpath } , status = " 404 " )
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else :
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return render ( request , " pagenotfound.html " , { " path " : subpath } , status = " 404 " )
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def expopage ( request , path ) :
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""" Either renders an HTML page from expoweb with all the menus,
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or serves an unadorned binary file with mime type
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"""
# print(" - EXPOPAGES delivering the file: '{}':{} as MIME type: {}".format(request.path, path,getmimetype(path)),flush=True)
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if path . startswith ( " noinfo " ) and settings . PUBLIC_SITE and not request . user . is_authenticated :
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return HttpResponseRedirect ( urljoin ( reverse ( " expologin " ) , f " ?next= { request . path } " ) )
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if path . startswith ( " admin/ " ) :
# don't even attempt to handle these sorts of mistakes
return HttpResponseRedirect ( " /admin/ " )
expowebpath = Path ( settings . EXPOWEB )
if path == " " :
return expowebpage ( request , expowebpath , " index.htm " )
if path . endswith ( " .htm " ) or path . endswith ( " .html " ) :
return expowebpage ( request , expowebpath , path )
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if Path ( expowebpath / path ) . is_dir ( ) :
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for p in [ " index.html " , " index.htm " ] :
if ( expowebpath / path / p ) . is_file ( ) :
# This needs to reset the path to the new subdirectory
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return HttpResponseRedirect ( " / " + str ( Path ( path ) / p ) )
return render ( request , " pagenotfound.html " , { " path " : Path ( path ) / " index.html " } , status = " 404 " )
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if path . endswith ( " / " ) :
# we already know it is not a directory.
# the final / may have been appended by middleware if there was no page without it
# do not redirect to a file path without the slash as we may get in a loop. Let the user fix it:
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return render ( request , " dirnotfound.html " , { " path " : path , " subpath " : path [ 0 : - 1 ] } )
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# So it must be a file in /expoweb/ but not .htm or .html probably an image, maybe a txt file
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filetobeopened = expowebpath / path
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# print(f' - {sys_getfilesystemencoding()=}')
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if sys_getfilesystemencoding ( ) != " utf-8 " :
return HttpResponse (
default_head
+ " <h3>UTF-8 Parsing Failure:<br>Default file encoding on this Troggle installation is not UTF-8:<br>failure detected in expowebpage in views.expo.py</h3> Please Please reconfigure Debian/Apache/Django to fix this, i.e. contact Wookey. </body "
)
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try :
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content = open ( filetobeopened , " rb " )
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content_type = getmimetype ( path )
return HttpResponse ( content = content , content_type = content_type )
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except IOError :
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return render ( request , " pagenotfound.html " , { " path " : path } , status = " 404 " )
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def getmimetype ( path ) :
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""" Our own version rather than relying on what is provided by the python library. Note that when
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Apache or nginx is used to deliver / expofiles / it will use it ' s own idea of mimetypes and
not these .
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"""
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path = str ( path )
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if path . lower ( ) . endswith ( " .css " ) :
return " text/css "
if path . lower ( ) . endswith ( " .txt " ) :
return " text/css "
if path . lower ( ) . endswith ( " .js " ) :
return " application/javascript "
if path . lower ( ) . endswith ( " .json " ) :
return " application/javascript "
if path . lower ( ) . endswith ( " .ico " ) :
return " image/vnd.microsoft.icon "
if path . lower ( ) . endswith ( " .png " ) :
return " image/png "
if path . lower ( ) . endswith ( " .tif " ) :
return " image/tif "
if path . lower ( ) . endswith ( " .gif " ) :
return " image/gif "
if path . lower ( ) . endswith ( " .jpeg " ) :
return " image/jpeg "
if path . lower ( ) . endswith ( " .jpg " ) :
return " image/jpeg "
if path . lower ( ) . endswith ( " svg " ) :
return " image/svg+xml "
if path . lower ( ) . endswith ( " xml " ) :
return " application/xml " # we use "text/xml" for tunnel files
if path . lower ( ) . endswith ( " .pdf " ) :
return " application/pdf "
if path . lower ( ) . endswith ( " .ps " ) :
return " application/postscript "
if path . lower ( ) . endswith ( " .svx " ) :
return " application/x-survex-svx "
if path . lower ( ) . endswith ( " .3d " ) :
return " application/x-survex-3d "
if path . lower ( ) . endswith ( " .pos " ) :
return " application/x-survex-pos "
if path . lower ( ) . endswith ( " .err " ) :
return " application/x-survex-err "
if path . lower ( ) . endswith ( " .odt " ) :
return " application/vnd.oasis.opendocument.text "
if path . lower ( ) . endswith ( " .ods " ) :
return " application/vnd.oasis.opendocument.spreadsheet "
if path . lower ( ) . endswith ( " .docx " ) :
return " application/vnd.openxmlformats-officedocument.wordprocessingml.document "
if path . lower ( ) . endswith ( " .xslx " ) :
return " application/vnd.openxmlformats-officedocument.spreadsheetml.sheet "
if path . lower ( ) . endswith ( " .gz " ) :
return " application/x-7z-compressed "
if path . lower ( ) . endswith ( " .7z " ) :
return " application/x-7z-compressed "
if path . lower ( ) . endswith ( " .zip " ) :
return " application/zip "
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return " "
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@login_required_if_public
@ensure_csrf_cookie
def editexpopage ( request , path ) :
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""" Manages the ' Edit this Page ' capability for expo handbook and other html pages.
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Relies on HTML5 or javascript to provide the in - browser editing environment .
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"""
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try :
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# if a cave not a webpage at all.
r = Cave . objects . get ( url = path )
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return troggle . core . views . caves . editCave ( request , r . cave . slug )
except Cave . DoesNotExist :
pass
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print ( f " - { sys_getfilesystemencoding ( ) =} " )
if sys_getfilesystemencoding ( ) != " utf-8 " :
return HttpResponse (
default_head
+ " <h3>UTF-8 Parsing Failure:<br>Default file encoding on this Troggle installation is not UTF-8:<br>failure detected in expowebpage in views.expo.py</h3> Please Please reconfigure Debian/Apache/Django to fix this, i.e. contact Wookey. </body "
)
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try :
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filepath = Path ( settings . EXPOWEB ) / path
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o = open ( filepath , " r " , encoding = " utf8 " )
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html = o . read ( )
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autogeneratedmatch = re . search (
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r " \ < \ !-- \ s*(.*?(Do not edit|It is auto-generated|NOEDIT).*?) \ s*-- \ > " , html , re . DOTALL + re . IGNORECASE
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)
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if autogeneratedmatch :
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message = " \t This page is either auto-generated, and so cannot be edited, \n \t \t or it is too complex to allow users to edit it safely. \n \n \t \t A safer means of updating this page is on the programmers ' to-do list. "
return render ( request , " errors/notice.html " , { " message " : message } )
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m = re . search ( r " (.*)<head([^>]*)>(.*)</head>(.*)<body([^>]*)>(.*)</body>(.*) " , html , re . DOTALL + re . IGNORECASE )
if m :
filefound = True
preheader , headerargs , head , postheader , bodyargs , body , postbody = m . groups ( )
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# linksmatch = re.match(r'(.*)(<ul\s+id="links">.*)', body, re.DOTALL + re.IGNORECASE)
# if linksmatch:
# body, links = linksmatch.groups()
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else :
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return HttpResponse (
default_head
+ html
+ " <h3>HTML Parsing failure:<br>Page could not be parsed into header and body:<br>failure detected in expowebpage in views.expo.py</h3> Please edit this <var>:expoweb:</var> page to be in the expected full HTML format .</body> "
)
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except IOError :
print ( " ### File not found ### " , filepath )
filefound = False
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if request . method == " POST " : # If the form has been submitted...
pageform = ExpoPageForm ( request . POST ) # A form bound to the POST data
if pageform . is_valid ( ) : # Form valid therefore write file
# print("### \n", str(pageform)[0:300])
# print("### \n csrfmiddlewaretoken: ",request.POST['csrfmiddlewaretoken'])
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if filefound :
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headmatch = re . match ( r " (.*)<title>.*</title>(.*) " , head , re . DOTALL + re . IGNORECASE )
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if headmatch :
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head = (
headmatch . group ( 1 )
+ " <title> "
+ pageform . cleaned_data [ " title " ]
+ " </title> "
+ headmatch . group ( 2 )
)
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else :
head = " <title> " + pageform . cleaned_data [ " title " ] + " </title> "
else :
head = " <title> " + pageform . cleaned_data [ " title " ] + " </title> "
preheader = " <html> "
headerargs = " "
postheader = " "
bodyargs = " "
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postbody = " </html> \n "
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body = pageform . cleaned_data [ " html " ]
body = body . replace ( " \r " , " " )
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result = f " { preheader } <head { headerargs } > { head } </head> { postheader } <body { bodyargs } > \n { body } </body> { postbody } "
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if not filefound or result != html : # Check if content changed at all
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try :
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change_message = pageform . cleaned_data [ " change_message " ]
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write_and_commit ( [ ( filepath , result , " utf-8 " ) ] , f " { change_message } - online edit of { path } " )
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except WriteAndCommitError as e :
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return render ( request , " errors/generic.html " , { " message " : e . message } )
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return HttpResponseRedirect ( reverse ( " expopage " , args = [ path ] ) ) # Redirect after POST
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else :
if filefound :
m = re . search ( r " <title>(.*)</title> " , head , re . DOTALL + re . IGNORECASE )
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if m :
( title , ) = m . groups ( )
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else :
title = " "
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pageform = ExpoPageForm ( initial = { " html " : body , " title " : title } )
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else :
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pageform = ExpoPageForm ( )
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return render (
request ,
" editexpopage.html " ,
{
" path " : path ,
" form " : pageform ,
} ,
)
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class ExpoPageForm ( forms . Form ) :
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""" The form used by the editexpopage function """
title = forms . CharField (
widget = forms . TextInput ( attrs = { " size " : " 60 " , " placeholder " : " Enter title (displayed in tab) " } )
)
html = forms . CharField (
widget = HTMLarea (
attrs = { " height " : " 80 % " , " rows " : 20 , " placeholder " : " Enter page content (using HTML) " } , preview = True
) ,
required = False ,
)
change_message = forms . CharField (
widget = forms . Textarea (
attrs = { " cols " : 80 , " rows " : 3 , " placeholder " : " Describe the change made (for version control records) " }
)
)
