import os
import re
import subprocess
from pathlib import Path
from urllib.parse import urljoin, unquote as urlunquote
from urllib.request import urlopen
from django.shortcuts import render, redirect
from django.http import HttpResponse, HttpResponseRedirect, Http404
from django.urls import reverse, resolve
from django.template import Context, loader
from django.views.decorators.csrf import ensure_csrf_cookie
from django.contrib import admin
import django.forms as forms
from .auth import login_required_if_public
from troggle.core.models.caves import Cave
import troggle.core.views.caves
import troggle.settings as settings
'''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.
Then it was incorporated into troggle directly, rather than being an unnecessary external package.
'''
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">
<input id="omega-autofocus" type=search name=P size=8 autofocus>
<input type=submit value="Search"></li>
</ul>''' # this gets overwritten by templates/menu.html by django for most normal pages
def expofiles_redirect(request, filepath):
'''This is used only when running as a test system without a local copy of /expofiles/
when settings.EXPOFILESREMOTE is True
'''
return redirect(urljoin('http://expo.survex.com/expofiles/', filepath))
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))
def expofilessingle(request, filepath):
'''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.
'''
#print(f' - expofilessingle {filepath}')
if filepath =="" or filepath =="/":
return expofilesdir(request, settings.EXPOFILES, "")
fn=urlunquote(filepath)
fn = Path(settings.EXPOFILES,filepath)
if fn.is_dir():
return expofilesdir(request, Path(fn), Path(filepath))
if fn.is_file():
return HttpResponse(content=open(fn, "rb"),content_type=getmimetype(filepath)) # any file
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)
def expofilesdir(request, dirpath, filepath):
'''does a directory display. If there is an index.html file we should display that.
- dirpath is a full Path() resolved including local machine /expofiles/
- filepath is a Path() and it does not have /expofiles/ in it
'''
#print(f' - expofilesdir {dirpath} settings.EXPOFILESREMOTE: {settings.EXPOFILESREMOTE}')
if filepath:
urlpath = 'expofiles' / Path(filepath)
else:
urlpath = Path('expofiles')
try:
for f in dirpath.iterdir():
pass
except FileNotFoundError:
#print(f' - expofilesdir error {dirpath}')
return expofilesdir(request, dirpath.parent, filepath.parent)
fileitems = []
diritems = []
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 })
def expowebpage(request, expowebpath, path):
'''Adds menus and serves an HTML page
'''
if not os.path.isfile(expowebpath / path):
# Should not get here if the path has suffix "_edit"
print(f' - 404 error in expowebpage() {path}')
return render(request, 'pagenotfound.html', {'path': path}, status="404")
try:
with open(expowebpath / path, "r", encoding='utf-8') as o:
html = o.read()
except:
# 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
try:
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("\\'","\'")
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' )
m = re.search(r'(.*)<\s*head([^>]*)>(.*)<\s*/head\s*>(.*)<\s*body([^>]*)>(.*)<\s*/body\s*>(.*)', html, re.DOTALL + re.IGNORECASE)
if m:
preheader, headerattrs, head, postheader, bodyattrs, body, postbody = m.groups()
else:
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)
if m:
title, = m.groups()
else:
title = ""
m = re.search(r"^<meta([^>]*)noedit", head, re.DOTALL + re.IGNORECASE)
if m:
editable = False
else:
editable = os.access(expowebpath / path, os.W_OK) # are file permissions writeable?
has_menu = False
menumatch = re.match(r'(.*)<div id="menu">', body, re.DOTALL + re.IGNORECASE)
if menumatch:
has_menu = True
menumatch = re.match(r'(.*)<ul id="links">', body, re.DOTALL + re.IGNORECASE)
if menumatch:
has_menu = True
return render(request, 'expopage.html', {'editable': editable, 'path': path, 'title': title,
'body': body, 'homepage': (path == "index.htm"), 'has_menu': has_menu})
def mediapage(request, subpath=None, doc_root=None):
'''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))
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:
return render(request, 'pagenotfound.html', {'path': subpath}, status="404")
else:
return render(request, 'pagenotfound.html', {'path': subpath}, status="404")
def expopage(request, path):
'''Either renders an HTML page from expoweb with all the menus,
or serves an unadorned binary file with mime type
'''
#print(" - EXPOPAGES delivering the file: '{}':{} as MIME type: {}".format(request.path, path,getmimetype(path)),flush=True)
if path.startswith("noinfo") and settings.PUBLIC_SITE and not request.user.is_authenticated:
return HttpResponseRedirect(urljoin(reverse("auth_login"),'?next={}'.format(request.path)))
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)
if Path(expowebpath / path ).is_dir():
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))
return render(request, 'pagenotfound.html', {'path': Path(path) / "index.html"}, status="404")
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]})
# So it must be a file in /expoweb/ but not .htm or .html probably an image
filetobeopened = expowebpath / path
try:
content = open(filetobeopened, "rb")
content_type=getmimetype(path)
return HttpResponse(content = content, content_type=content_type)
except IOError:
return render(request, 'pagenotfound.html', {'path': path}, status="404")
def getmimetype(path):
'''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.
'''
path = str(path)
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/xhtml" 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"
return ""
@login_required_if_public
@ensure_csrf_cookie
def editexpopage(request, path):
'''Manages the 'Edit this Page' capability for expo handbook and other html pages.
Relies on HTML5 or javascript to provide the in-browser editing environment.
'''
try:
# if a cave not a webpage at all.
r = Cave.objects.get(url = path)
return troggle.core.views.caves.editCave(request, r.cave.slug)
except Cave.DoesNotExist:
pass
try:
filepath = Path(settings.EXPOWEB) / path
o = open(filepath, "r", encoding="utf8")
html = o.read()
autogeneratedmatch = re.search(r"\<\!--\s*(.*?(Do not edit|It is auto-generated).*?)\s*--\>", html, re.DOTALL + re.IGNORECASE)
if autogeneratedmatch:
return HttpResponse(autogeneratedmatch.group(1))
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()
linksmatch = re.match(r'(.*)(<ul\s+id="links">.*)', body, re.DOTALL + re.IGNORECASE)
if linksmatch:
body, links = linksmatch.groups()
# if re.search(r"iso-8859-1", html):
# body = str(body, "iso-8859-1")
else:
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>' )
except IOError:
print("### File not found ### ", filepath)
filefound = False
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'])
if filefound:
headmatch = re.match(r"(.*)<title>.*</title>(.*)", head, re.DOTALL + re.IGNORECASE)
if headmatch:
head = headmatch.group(1) + "<title>" + pageform.cleaned_data["title"] + "</title>" + headmatch.group(2)
else:
head = "<title>" + pageform.cleaned_data["title"] + "</title>"
else:
head = "<title>" + pageform.cleaned_data["title"] + "</title>"
preheader = "<html>"
headerargs = ""
postheader = ""
bodyargs = ""
postbody = "</html>\n"
body = pageform.cleaned_data["html"]
body = body.replace("\r", "")
result = "%s<head%s>%s</head>%s<body%s>\n%s</body>%s" % (preheader, headerargs, head, postheader, bodyargs, body, postbody)
if result != html: # Check if content changed
try:
write_and_commit(filepath, result)
except WriteAndCommitError as e:
return render(request,'errors/generic.html', {'message': e.message})
return HttpResponseRedirect(reverse('expopage', args=[path])) # Redirect after POST
else:
if filefound:
m = re.search(r"<title>(.*)</title>", head, re.DOTALL + re.IGNORECASE)
if m:
title, = m.groups()
else:
title = ""
pageform = ExpoPageForm({"html": body, "title": title})
else:
body = "### File not found ###\n" + str(filepath)
import sys
import locale
body = body + "\nsys.getdefaultencoding() = " + str(sys.getdefaultencoding())
body = body + "\nsys.getfilesystemencoding() = " + str(sys.getfilesystemencoding())
body = body + "\nlocale.getdefaultlocale() = " + str(locale.getdefaultlocale())
body = body + "\nlocale.getpreferredencoding() = " + str(locale.getpreferredencoding())
pageform = ExpoPageForm({"html": body, "title": "Missing"})
return render(request, 'editexpopage.html', {'path': path, 'form': pageform, })
class WriteAndCommitError(Exception):
def __init__(self, message):
self.message = message
def __str__(self):
return f'WriteAndCommitError: {self.message}'
def write_and_commit(filepath, content):
cwd = filepath.parent
filename = filepath.name
git = settings.GIT
# GIT see also core/models/cave.py writetrogglefile()
# GIT see also core/views/uploads.py dwgupload()
try:
with open(filepath, "w", encoding="utf8") as f:
print(f'WRITING{cwd}---{filename} ')
# 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(content)
except PermissionError:
message = f'CANNOT save this file.\nPERMISSIONS incorrectly set on server for this file {filename}. Ask a nerd to fix this.'
raise WriteAndCommitError(message)
try:
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\nreturn 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
raise WriteAndCommitError(message)
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
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\nreturn code: ' + str(cp_commit.returncode)
message = f'Error code with git on server for this file {filename}. Edits saved, added to git, but NOT committed.\n\n' + msgdata
raise WriteAndCommitError(message)
except subprocess.SubprocessError:
message = f'CANNOT git on server for this file {filename}. Subprocess error. Edits not saved.\nAsk a nerd to fix this.'
raise WriteAndCommitError(message)
class ExpoPageForm(forms.Form):
'''The form used by the editexpopage function
'''
title = forms.CharField(widget=forms.TextInput(attrs={'size':'60'}))
html = forms.CharField(widget=forms.Textarea(attrs={"cols":80, "rows":20}))