from django import http from django.conf import settings from utils import next_redirect, confirmation_view from django.core.exceptions import ObjectDoesNotExist from django.db import models from django.shortcuts import render_to_response from django.template import RequestContext from django.template.loader import render_to_string from django.utils.html import escape from django.views.decorators.http import require_POST from django.contrib import comments from django.contrib.comments import signals from django.views.decorators.csrf import csrf_protect class CommentPostBadRequest(http.HttpResponseBadRequest): """ Response returned when a comment post is invalid. If ``DEBUG`` is on a nice-ish error message will be displayed (for debugging purposes), but in production mode a simple opaque 400 page will be displayed. """ def __init__(self, why): super(CommentPostBadRequest, self).__init__() if settings.DEBUG: self.content = render_to_string("comments/400-debug.html", {"why": why}) @csrf_protect @require_POST def post_comment(request, next=None, using=None): """ Post a comment. HTTP POST is required. If ``POST['submit'] == "preview"`` or if there are errors a preview template, ``comments/preview.html``, will be rendered. """ # Fill out some initial data fields from an authenticated user, if present data = request.POST.copy() if request.user.is_authenticated(): if not data.get('name', ''): data["name"] = request.user.get_full_name() or request.user.username if not data.get('email', ''): data["email"] = request.user.email # Check to see if the POST data overrides the view's next argument. next = data.get("next", next) # Look up the object we're trying to comment about ctype = data.get("content_type") object_pk = data.get("object_pk") if ctype is None or object_pk is None: return CommentPostBadRequest("Missing content_type or object_pk field.") try: model = models.get_model(*ctype.split(".", 1)) target = model._default_manager.using(using).get(pk=object_pk) except TypeError: return CommentPostBadRequest( "Invalid content_type value: %r" % escape(ctype)) except AttributeError: return CommentPostBadRequest( "The given content-type %r does not resolve to a valid model." % \ escape(ctype)) except ObjectDoesNotExist: return CommentPostBadRequest( "No object matching content-type %r and object PK %r exists." % \ (escape(ctype), escape(object_pk))) # Do we want to preview the comment? preview = "preview" in data # Construct the comment form form = comments.get_form()(target, data=data) # Check security information if form.security_errors(): return CommentPostBadRequest( "The comment form failed security verification: %s" % \ escape(str(form.security_errors()))) # If there are errors or if we requested a preview show the comment if form.errors or preview: template_list = [ # These first two exist for purely historical reasons. # Django v1.0 and v1.1 allowed the underscore format for # preview templates, so we have to preserve that format. "comments/%s_%s_preview.html" % (model._meta.app_label, model._meta.module_name), "comments/%s_preview.html" % model._meta.app_label, # Now the usual directory based template heirarchy. "comments/%s/%s/preview.html" % (model._meta.app_label, model._meta.module_name), "comments/%s/preview.html" % model._meta.app_label, "comments/preview.html", ] return render_to_response( template_list, { "comment" : form.data.get("comment", ""), "form" : form, "next": next, }, RequestContext(request, {}) ) # Otherwise create the comment comment = form.get_comment_object() comment.ip_address = request.META.get("REMOTE_ADDR", None) if request.user.is_authenticated(): comment.user = request.user # Signal that the comment is about to be saved responses = signals.comment_will_be_posted.send( sender = comment.__class__, comment = comment, request = request ) for (receiver, response) in responses: if response == False: return CommentPostBadRequest( "comment_will_be_posted receiver %r killed the comment" % receiver.__name__) # Save the comment and signal that it was saved comment.save() signals.comment_was_posted.send( sender = comment.__class__, comment = comment, request = request ) return next_redirect(data, next, comment_done, c=comment._get_pk_val()) comment_done = confirmation_view( template = "comments/posted.html", doc = """Display a "comment was posted" success page.""" )