<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def create_bug(self, request):
 """ Create a bugzilla bug with passed params """

        if settings.BUGFILER_API_KEY is None:
            return Response({"failure": "Bugzilla API key not set!"},
                            status=HTTP_400_BAD_REQUEST)

        params = request.data

        # Arbitrarily cap crash signatures at 2048 characters to prevent perf issues on bmo
        crash_signature = params.get("crash_signature")
        if crash_signature and len(crash_signature) > 2048:
            return Response({"failure": "Crash signature can't be more than 2048 characters."},
                            status=HTTP_400_BAD_REQUEST)

        description = u"**Filed by:** {}\n{}".format(
            request.user.email.replace('@', " [at] "),
            params.get("comment", "")
        ).encode("utf-8")
        summary = params.get("summary").encode("utf-8").strip()
        url = settings.BUGFILER_API_URL + "/rest/bug"
        headers = {
            'x-bugzilla-api-key': settings.BUGFILER_API_KEY,
            'Accept': 'application/json'
        }
        data = {
            'product': params.get("product"),
            'component': params.get("component"),
            'summary': summary,
            'keywords': params.get("keywords"),
            'blocks': params.get("blocks"),
            'depends_on': params.get("depends_on"),
            'see_also': params.get("see_also"),
            'version': params.get("version"),
            'cf_crash_signature': params.get("crash_signature"),
            'severity': params.get("severity"),
            'priority': params.get("priority"),
            'description': description,
            'comment_tags': "treeherder",
        }

        try:
            response = make_request(url, method='POST', headers=headers, json=data)
        except requests.exceptions.HTTPError as e:
            try:
                message = e.response.json()['message']
            except (ValueError, KeyError):
                message = e.response.text
            return Response({"failure": message}, status=HTTP_400_BAD_REQUEST)

        return Response({"success": response.json()["id"]})