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import os
import re
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import subprocess
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from pathlib import Path
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from urllib . parse import urljoin , unquote as urlunquote
from urllib . request import urlopen
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from django . shortcuts import render , redirect
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from django . http import HttpResponse , HttpResponseRedirect , Http404
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from django . urls import reverse , resolve
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from django . template import Context , loader
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from django . views . decorators . csrf import ensure_csrf_cookie
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from django . contrib import admin
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import django . forms as forms
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from . auth import login_required_if_public
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from troggle . core . models . caves import Cave
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import troggle . core . views . caves
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import troggle . settings as settings
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''' Formerly a separate package called ' flatpages ' written by Martin Green 2011.
This was NOT django . contrib . flatpages which stores HTML in the database , so the name was changed to expopages .
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Then it was incorporated into troggle directly , rather than being an unnecessary external package .
'''
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default_head = ''' <head>
< 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 " >
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< input id = " omega-autofocus " type = search name = P size = 8 autofocus >
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< 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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'''
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return redirect ( urljoin ( ' http://expo.survex.com/expofiles/ ' , filepath ) )
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def map ( request ) :
''' 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 ' )
def mapfile ( request , path ) :
''' 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
If the path actually is a directory , then show that .
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'''
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#print(f' - expofilessingle {filepath}')
if filepath == " " or filepath == " / " :
return expofilesdir ( request , settings . EXPOFILES , " " )
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fn = urlunquote ( filepath )
fn = Path ( settings . EXPOFILES , filepath )
if fn . is_dir ( ) :
return expofilesdir ( request , Path ( fn ) , Path ( filepath ) )
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if fn . is_file ( ) :
return HttpResponse ( content = open ( fn , " rb " ) , content_type = getmimetype ( filepath ) ) # any file
else :
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# 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 ) :
''' 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 /
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- filepath is a Path ( ) and it does not have / expofiles / in it
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'''
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#print(f' - expofilesdir {dirpath} settings.EXPOFILESREMOTE: {settings.EXPOFILESREMOTE}')
if filepath :
urlpath = ' expofiles ' / Path ( filepath )
else :
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 ( ) :
diritems . append ( ( urlpath / f . parts [ - 1 ] , str ( f . parts [ - 1 ] ) ) )
else :
# if f.parts[-1].lower() == 'index.htm' or f.parts[-1].lower() == 'index.html': # css cwd problem
# return HttpResponse(content=open(f, "rb"),content_type=getmimetype(filepath)) # any file
# return expofilessingle(request, str(Path(filepath / f.parts[-1])))
fileitems . append ( ( Path ( urlpath ) / f . parts [ - 1 ] , str ( f . parts [ - 1 ] ) , getmimetype ( f ) ) )
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 Path ( expowebpath / path ) . is_file ( ) :
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# Should not get here if the path has suffix "_edit"
print ( f ' - 404 error in expowebpage() { path } ' )
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return render ( request , ' pagenotfound.html ' , { ' path ' : path } , status = " 404 " )
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try :
with open ( os . path . normpath ( expowebpath / path ) , " r " ) as o :
html = o . read ( )
except :
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try :
with open ( os . path . normpath ( expowebpath / path ) , " rb " ) as o :
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html = str ( o . read ( ) )
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except :
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 ' )
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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 ' )
m = re . search ( r " <title>(.*)</title> " , head , re . DOTALL + re . IGNORECASE )
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if m :
title , = m . groups ( )
else :
title = " "
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m = re . search ( r " ^<meta([^>]*)noedit " , head , re . DOTALL + re . IGNORECASE )
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if m :
editable = False
else :
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editable = os . access ( Path ( expowebpath / path ) , os . W_OK ) # are file permissions writeable?
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has_menu = False
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menumatch = re . match ( r ' (.*)<div id= " menu " > ' , body , re . DOTALL + re . IGNORECASE )
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if menumatch :
has_menu = True
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menumatch = re . match ( r ' (.*)<ul id= " links " > ' , body , re . DOTALL + re . IGNORECASE )
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if menumatch :
has_menu = True
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return render ( request , ' expopage.html ' , { ' editable ' : editable , ' path ' : path , ' title ' : title ,
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' body ' : body , ' homepage ' : ( path == " index.htm " ) , ' has_menu ' : has_menu } )
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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.
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as defined in urls . py . If given a directory , gives a failure page .
'''
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#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 ( ) :
return render ( request , ' nodirlist.html ' , { ' path ' : subpath } )
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 ( " auth_login " ) , ' ?next= {} ' . format ( request . path ) ) )
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if path . startswith ( " admin/ " ) :
# don't even attempt to handle these sorts of mistakes
return HttpResponseRedirect ( " /admin/ " )
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expowebpath = Path ( settings . EXPOWEB )
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if path == " " :
return expowebpage ( request , expowebpath , " index.htm " )
if path . endswith ( " .htm " ) or path . endswith ( " .html " ) :
return expowebpage ( request , expowebpath , path )
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
return HttpResponseRedirect ( ' / ' + str ( Path ( path ) / p ) )
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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:
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
filetobeopened = os . path . normpath ( expowebpath / path )
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try :
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return HttpResponse ( content = open ( filetobeopened , " rb " ) , content_type = getmimetype ( path ) )
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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
Apache or nginx is used to deliver / expofiles / it will use it ' s own idea of mimetypes and
not these .
'''
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path = str ( path )
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if path . lower ( ) . endswith ( " .css " ) : return " text/css "
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if path . lower ( ) . endswith ( " .txt " ) : return " text/css "
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if path . lower ( ) . endswith ( " .js " ) : return " application/javascript "
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if path . lower ( ) . endswith ( " .json " ) : return " application/javascript "
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if path . lower ( ) . endswith ( " .ico " ) : return " image/vnd.microsoft.icon "
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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 "
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if path . lower ( ) . endswith ( " xml " ) : return " application/xml " # we use "text/xhtml" for tunnel files
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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 "
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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
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@ensure_csrf_cookie
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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.
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r = Cave . objects . get ( url = path )
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return troggle . core . views . caves . editCave ( request , r . cave . slug )
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except Cave . DoesNotExist :
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pass
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try :
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filepath = Path ( settings . EXPOWEB ) / path
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o = open ( filepath , " r " )
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html = o . read ( )
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autogeneratedmatch = re . search ( r " \ < \ !-- \ s*(.*?(Do not edit|It is auto-generated).*?) \ s*-- \ > " , html , re . DOTALL + re . IGNORECASE )
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if autogeneratedmatch :
return HttpResponse ( autogeneratedmatch . group ( 1 ) )
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m = re . search ( r " (.*)<head([^>]*)>(.*)</head>(.*)<body([^>]*)>(.*)</body>(.*) " , html , re . DOTALL + re . IGNORECASE )
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if m :
filefound = True
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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 )
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if linksmatch :
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body , links = linksmatch . groups ( )
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# if re.search(r"iso-8859-1", html):
# body = str(body, "iso-8859-1")
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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 :
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print ( " ### File not found ### " , filepath )
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filefound = False
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if request . method == ' POST ' : # If the form has been submitted...
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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 ] )
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print ( " ### \n csrfmiddlewaretoken: " , request . POST [ ' csrfmiddlewaretoken ' ] )
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if filefound :
headmatch = re . match ( r " (.*)<title>.*</title>(.*) " , head , re . DOTALL + re . IGNORECASE )
if headmatch :
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head = headmatch . group ( 1 ) + " <title> " + pageform . cleaned_data [ " title " ] + " </title> " + headmatch . group ( 2 )
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else :
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head = " <title> " + pageform . cleaned_data [ " title " ] + " </title> "
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else :
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head = " <title> " + pageform . cleaned_data [ " title " ] + " </title> "
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preheader = " <html> "
headerargs = " "
postheader = " "
bodyargs = " "
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postbody = " </html> \n "
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body = pageform . cleaned_data [ " html " ]
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body = body . replace ( " \r " , " " )
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result = " %s <head %s > %s </head> %s <body %s > \n %s </body> %s " % ( preheader , headerargs , head , postheader , bodyargs , body , postbody )
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cwd = filepath . parent
filename = filepath . name
git = settings . GIT
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# GIT see also core/models/cave.py writetrogglefile()
# GIT see also core/views/uploads.py dwgupload()
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try :
with open ( filepath , " w " ) as f :
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print ( f ' WRITING { cwd } --- { filename } ' )
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# as the wsgi process www-data, we have group write-access but are not owner, so cannot chmod.
# os.chmod(filepath, 0o664) # set file permissions to rw-rw-r--
f . write ( result )
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except PermissionError :
message = f ' CANNOT save this file. \n PERMISSIONS incorrectly set on server for this file { filename } . Ask a nerd to fix this. '
return render ( request , ' errors/generic.html ' , { ' message ' : message } )
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try :
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cp_add = subprocess . run ( [ git , " add " , filename ] , cwd = cwd , capture_output = True , text = True )
if cp_add . returncode != 0 :
msgdata = ' Ask a nerd to fix this. \n \n ' + cp_add . stderr + ' \n \n ' + cp_add . stdout + ' \n \n return code: ' + str ( cp_add . returncode )
message = f ' CANNOT git on server for this file { filename } . Edits saved but not added to git. \n \n ' + msgdata
return render ( request , ' errors/generic.html ' , { ' message ' : message } )
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cp_commit = subprocess . run ( [ git , " commit " , " -m " , f ' Troggle online: Edit this page - { filename } ' ] , cwd = cwd , capture_output = True , text = True )
# This produces return code = 1 if it commits OK, but when the repo still needs to be pushed to origin/expoweb
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if cp_commit . returncode != 0 and cp_commit . stdout != ' nothing to commit, working tree clean ' :
msgdata = ' Ask a nerd to fix this. \n \n ' + cp_commit . stderr + ' \n \n ' + cp_commit . stdout + ' \n \n return code: ' + str ( cp_commit . returncode )
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message = f ' Error code with git on server for this file { filename } . Edits saved, added to git, but NOT committed. \n \n ' + msgdata
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return render ( request , ' errors/generic.html ' , { ' message ' : message } )
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except subprocess . SubprocessError :
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message = f ' CANNOT git on server for this file { filename } . Subprocess error. Edits not saved. \n Ask a nerd to fix this. '
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return render ( request , ' errors/generic.html ' , { ' message ' : message } )
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return HttpResponseRedirect ( reverse ( ' expopage ' , args = [ path ] ) ) # Redirect after POST
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else :
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if filefound :
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m = re . search ( r " <title>(.*)</title> " , head , re . DOTALL + re . IGNORECASE )
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if m :
title , = m . groups ( )
else :
title = " "
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pageform = ExpoPageForm ( { " html " : body , " title " : title } )
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else :
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body = " ### File not found ### \n " + str ( filepath )
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pageform = ExpoPageForm ( { " html " : body , " title " : " Missing " } )
return render ( request , ' editexpopage.html ' , { ' path ' : path , ' form ' : pageform , } )
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class ExpoPageForm ( forms . Form ) :
''' The form used by the editexpopage function
'''
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title = forms . CharField ( widget = forms . TextInput ( attrs = { ' size ' : ' 60 ' } ) )
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html = forms . CharField ( widget = forms . Textarea ( attrs = { " cols " : 80 , " rows " : 20 } ) )
