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making flat files delivery more robust
This commit is contained in:
Philip Sargent
parent
3452c2c5d4
commit
a6ed0a964e
@ -9,6 +9,7 @@ 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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@ -55,93 +56,96 @@ def expofilesdir(request, dirpath, filepath):
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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 memnus and serves an HTML page
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'''
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if not Path(expowebpath / path).is_file():
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return render(request, 'pagenotfound.html', {'path': path})
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with open(os.path.normpath(expowebpath / path), "rb") as o:
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html = o.read()
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m = re.search(rb'(.*)<\s*head([^>]*)>(.*)<\s*/head\s*>(.*)<\s*body([^>]*)>(.*)<\s*/body\s*>(.*)', html, re.DOTALL + re.IGNORECASE)
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if m:
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preheader, headerattrs, head, postheader, bodyattrs, body, postbody = m.groups()
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else:
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return HttpResponse(html + "HTML Parsing failure: Page could not be split into header and body: failed in expowebpage in views_expo.py")
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m = re.search(rb"<title>(.*)</title>", head, re.DOTALL + re.IGNORECASE)
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if m:
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title, = m.groups()
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else:
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title = ""
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m = re.search(rb"<meta([^>]*)noedit", head, re.DOTALL + re.IGNORECASE)
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if m:
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editable = False
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else:
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editable = True
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has_menu = False
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menumatch = re.match(rb'(.*)<div id="menu">', body, re.DOTALL + re.IGNORECASE)
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if menumatch:
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has_menu = True
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menumatch = re.match(rb'(.*)<ul id="links">', body, re.DOTALL + re.IGNORECASE)
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if menumatch:
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has_menu = True
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return render(request, 'flatpage.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 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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This is a horrible mess and some code is redundant and unreachable because of urls.py setup
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'''
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# print(" - EXPOPAGES delivering the file: {} as MIME type: {}".format(path,getmimetype(path)),flush=True)
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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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# print((" - EXPOPAGES redirect to logon: flat path noinfo", path))
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return HttpResponseRedirect(urljoin(reverse("auth_login"),'?next={}'.format(request.path)))
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expowebpath = Path(settings.EXPOWEB)
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if path.endswith("/") or path == "":
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# print(" - EXPOPAGES the file: {} ENDSWITH ...".format(path))
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if path.startswith("admin/"):
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# don't even attempt to handle these sorts of mistakes
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return HttpResponseRedirect("/admin/")
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expowebpath = Path(settings.EXPOWEB)
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if path == "":
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return expowebpage(request, expowebpath, "index.htm")
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try:
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o = open(os.path.normpath(expowebpath / path / "index.html"), "rb")
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path = path + "index.html"
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except IOError:
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try:
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o = open(os.path.normpath(expowebpath / path / "index.htm"), "rb")
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path = path + "index.htm"
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except IOError:
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return render(request, 'pagenotfound.html', {'path': path})
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else:
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# print(" - EXPOPAGES the file: '{}' ...".format(path))
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if path.startswith('site_media'):
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# print(" - MEDIA_ROOT: {} ...{}".format(settings.MEDIA_ROOT, path))
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path = path.replace("site_media", settings.MEDIA_ROOT)
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filetobeopened = os.path.normpath(path)
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elif path.startswith("static"):
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# print(" - STATIC_ROOT: {} ...{}".format(settings.MEDIA_ROOT, path))
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path = path.replace("static", settings.MEDIA_ROOT)
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filetobeopened = os.path.normpath(path)
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else:
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# print(" - NO _ROOT: {} ...".format(expowebpath))
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filetobeopened = os.path.normpath(expowebpath / path)
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# print(" - EXPOPAGES full path : {} ...".format(filetobeopened))
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try:
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o = open(filetobeopened, "rb")
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#print(" - EXPOPAGES full path no error: {} ...".format(filetobeopened))
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except IOError:
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#print(" - EXPOPAGES ERROR: {} ...".format(filetobeopened))
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#o.close()
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return render(request, 'pagenotfound.html', {'path': path})
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if path.endswith(".htm") or path.endswith(".html"):
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# add the menus etc.
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with open(os.path.normpath(expowebpath / path), "rb") as o:
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html = o.read()
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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", "default.html"]:
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try:
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o = open(os.path.normpath(expowebpath / path / p), "rb")
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except IOError:
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pass
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else: # no exception, so file was found
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return expowebpage(request, expowebpath, Path(path) / p)
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return render(request, 'pagenotfound.html', {'path': Path(path) / "index.html"})
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m = re.search(rb'(.*)<\s*head([^>]*)>(.*)<\s*/head\s*>(.*)<\s*body([^>]*)>(.*)<\s*/body\s*>(.*)', html, re.DOTALL + re.IGNORECASE)
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if m:
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preheader, headerattrs, head, postheader, bodyattrs, body, postbody = m.groups()
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else:
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return HttpResponse(html + "HTML Parsing failure: Page could not be split into header and body: failed in expopages.views.py")
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m = re.search(rb"<title>(.*)</title>", head, re.DOTALL + re.IGNORECASE)
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if m:
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title, = m.groups()
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else:
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title = ""
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m = re.search(rb"<meta([^>]*)noedit", head, re.DOTALL + re.IGNORECASE)
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if m:
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editable = False
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else:
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editable = True
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has_menu = False
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menumatch = re.match(rb'(.*)<div id="menu">', body, re.DOTALL + re.IGNORECASE)
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if menumatch:
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has_menu = True
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menumatch = re.match(rb'(.*)<ul id="links">', body, re.DOTALL + re.IGNORECASE)
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if menumatch:
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has_menu = True
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#body, = menumatch.groups()
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# if re.search(rb"iso-8859-1", html):
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# body = str(body, "iso-8859-1")
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# body.strip
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return render(request, 'flatpage.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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if path.endswith("/"):
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# we already know it is not a directory.
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# the final / may have been appended by middleware if there was no page without it
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# 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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if path.startswith('site_media'): # BUT we may have missing files, directories or .html here too?!
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# print(" - MEDIA_ROOT: {} ...{}".format(settings.MEDIA_ROOT, path))
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npath = path.replace("site_media", settings.MEDIA_ROOT)
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filetobeopened = os.path.normpath(npath)
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elif path.startswith("static"):
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# print(" - STATIC_ROOT: {} ...{}".format(settings.MEDIA_ROOT, path))
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npath = path.replace("static", settings.MEDIA_ROOT)
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filetobeopened = os.path.normpath(npath)
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else:
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# print(" - EXPOPAGES delivering the file: {} as MIME type: {}".format(path,getmimetype(path)))
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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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#return HttpResponse(content=open(singlescan.ffile,"rb"), content_type=getmimetype(path))
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except IOError:
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return render(request, 'pagenotfound.html', {'path': path})
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def getmimetype(path):
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path = str(path)
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@ -1,7 +1,6 @@
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from django.conf import settings
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from django import http
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from django.urls import reverse, resolve
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#from django.core.urlresolvers import resolve
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from django.urls import reverse, resolve,Resolver404
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"""Non-standard django middleware is loaded from this file.
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"""
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@ -17,19 +16,31 @@ class SmartAppendSlashMiddleware(object):
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"""
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def process_request(self, request):
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"""
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Rewrite the URL based on settings.SMART_APPEND_SLASH
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"""
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'''Called for every url so return as quickly as possible
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Append a slash if SMART_APPEND_SLASH is set, the resulting URL resolves and it doesn't without the /
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'''
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if not settings.SMART_APPEND_SLASH:
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return None
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if request.path.endswith('/'):
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return None
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if request.path.endswith('_edit'):
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return None
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# Check for a redirect based on settings.SMART_APPEND_SLASH
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host = http.HttpRequest.get_host(request)
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old_url = [host, request.path]
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new_url = old_url[:]
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# Append a slash if SMART_APPEND_SLASH is set and the resulting URL
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# resolves.
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if settings.SMART_APPEND_SLASH and (not old_url[1].endswith('/')) and not _resolves(old_url[1]) and _resolves(old_url[1] + '/'):
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new_url[1] = new_url[1] + '/'
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if _resolves(old_url[1]):
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return None
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# So: it does not resolve according to our criteria, i.e. _edit doesn't count
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new_url = old_url[:]
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new_url[1] = new_url[1] + '/'
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if not _resolves(new_url[1]):
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return None
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else:
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if settings.DEBUG and request.method == 'POST':
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# replace this exception with a redirect to an error page
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raise RuntimeError("You called this URL via POST, but the URL doesn't end in a slash and you have SMART_APPEND_SLASH set. Django can't redirect to the slash URL while maintaining POST data. Change your form to point to %s%s (note the trailing slash), or set SMART_APPEND_SLASH=False in your Django settings." % (new_url[0], new_url[1]))
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if new_url != old_url:
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# Redirect
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@ -45,9 +56,12 @@ class SmartAppendSlashMiddleware(object):
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def _resolves(url):
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try:
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resolve(url)
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# If the URL does not resolve, the function raises a Resolver404 exception (a subclass of Http404)
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match = resolve(url)
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# this will ALWAYS be resolved by expopages because it will produce pagenotfound if not the thing asked for
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# so handle this in expopages, not in middleware
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return True
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except http.Http404:
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except Resolver404:
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return False
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except:
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print(url)
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12
settings.py
12
settings.py
@ -104,7 +104,7 @@ LOGBOOK_PARSER_SETTINGS = {
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"1982": ("1982/log.htm", "Parseloghtml01"),
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}
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APPEND_SLASH = False
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APPEND_SLASH = False # never relevant because we have urls that match unknown files and produce an 'edit this page' response
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SMART_APPEND_SLASH = True
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@ -130,7 +130,7 @@ INSTALLED_APPS = (
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# See the recommended order of these in https://docs.djangoproject.com/en/2.2/ref/middleware/
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MIDDLEWARE_CLASSES = (
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#'django.middleware.security.SecurityMiddleware', # SECURE_SSL_REDIRECT and SECURE_SSL_HOST # we don't use this
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'django.middleware.gzip.GZipMiddleware', # not needed as expofiles and photos served by apache
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'django.middleware.gzip.GZipMiddleware', # not needed when expofiles and photos served by apache
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'django.contrib.sessions.middleware.SessionMiddleware', # Manages sessions, if CSRF_USE_SESSIONS then it needs to be early
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'django.middleware.common.CommonMiddleware', # DISALLOWED_USER_AGENTS, APPEND_SLASH and PREPEND_WWW
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'django.middleware.csrf.CsrfViewMiddleware', # Cross Site Request Forgeries by adding hidden form fields to POST
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@ -138,20 +138,20 @@ MIDDLEWARE_CLASSES = (
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'django.contrib.admindocs.middleware.XViewMiddleware', # this and docutils needed by admindocs
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'django.contrib.messages.middleware.MessageMiddleware', # Cookie-based and session-based message support. Needed by admin system
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'django.middleware.clickjacking.XFrameOptionsMiddleware', # clickjacking protection via the X-Frame-Options header
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'troggle.middleware.SmartAppendSlashMiddleware' #
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'troggle.middleware.SmartAppendSlashMiddleware' # doesn't seem to be working...
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)
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ROOT_URLCONF = 'troggle.urls'
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WSGI_APPLICATION = 'troggle.wsgi.application'
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WSGI_APPLICATION = 'troggle.wsgi.application' # change to asgi as soon as we upgrade to Django 3.0
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ACCOUNT_ACTIVATION_DAYS=3
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AUTH_PROFILE_MODULE = 'core.person'
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# AUTH_PROFILE_MODULE = 'core.person' # used by removed profiles app ?
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QM_PATTERN="\[\[\s*[Qq][Mm]:([ABC]?)(\d{4})-(\d*)-(\d*)\]\]"
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# Re-enable TinyMCE when Dj upgraded to v3. Also templates/editflatpage.html
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# Re-enable TinyMCE when Dj upgraded to v3. Also templates/editexpopage.html
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# TINYMCE_DEFAULT_CONFIG = {
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# 'plugins': "table,spellchecker,paste,searchreplace",
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# 'theme': "advanced",
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8
templates/dirnotfound.html
Normal file
8
templates/dirnotfound.html
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@ -0,0 +1,8 @@
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{% extends "expobase.html" %}
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{% block title %}Directory not found {{ path }}{% endblock %}
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{% block body %}
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<h1>Directory not found '{{ path }}'</h1>
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<h3>Click here: <a href="/{{ subpath }}">/{{ subpath }}</a> </h3>
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<p>i.e. without the final '/'
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{% include "menu.html" %}
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{% endblock %}
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