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|
"""
Submit a form.
"""
import binascii
import hashlib
from typing import Any, Optional
import uuid
import httpx
from pydantic.main import BaseModel
import pydnsbl
from pydantic import ValidationError
from spectree import Response
from starlette.requests import Request
from starlette.responses import JSONResponse
from backend.constants import HCAPTCHA_API_SECRET, FormFeatures
from backend.models import Form, FormResponse
from backend.route import Route
from backend.validation import AuthorizationHeaders, ErrorMessage, api
HCAPTCHA_VERIFY_URL = "https://hcaptcha.com/siteverify"
HCAPTCHA_HEADERS = {
"Content-Type": "application/x-www-form-urlencoded"
}
class SubmissionResponse(BaseModel):
form: Form
response: FormResponse
class PartialSubmission(BaseModel):
response: dict[str, Any]
captcha: Optional[str]
class SubmitForm(Route):
"""
Submit a form with the provided form ID.
"""
name = "submit_form"
path = "/submit/{form_id:str}"
@api.validate(
json=PartialSubmission,
resp=Response(
HTTP_200=SubmissionResponse,
HTTP_404=ErrorMessage,
HTTP_400=ErrorMessage
),
headers=AuthorizationHeaders,
tags=["forms", "responses"]
)
async def post(self, request: Request) -> JSONResponse:
"""Submit a response to the form."""
data = await request.json()
data["timestamp"] = None
if form := await request.state.db.forms.find_one(
{"_id": request.path_params["form_id"], "features": "OPEN"}
):
form = Form(**form)
response = data.copy()
response["id"] = str(uuid.uuid4())
response["form_id"] = form.id
if FormFeatures.DISABLE_ANTISPAM.value not in form.features:
ip_hash_ctx = hashlib.md5()
ip_hash_ctx.update(request.client.host.encode())
ip_hash = binascii.hexlify(ip_hash_ctx.digest())
user_agent_hash_ctx = hashlib.md5()
user_agent_hash_ctx.update(request.headers["User-Agent"].encode())
user_agent_hash = binascii.hexlify(user_agent_hash_ctx.digest())
dsn_checker = pydnsbl.DNSBLIpChecker()
dsn_blacklist = await dsn_checker.check_async(request.client.host)
async with httpx.AsyncClient() as client:
query_params = {
"secret": HCAPTCHA_API_SECRET,
"response": data.get("captcha")
}
r = await client.post(
HCAPTCHA_VERIFY_URL,
params=query_params,
headers=HCAPTCHA_HEADERS
)
r.raise_for_status()
captcha_data = r.json()
response["antispam"] = {
"ip_hash": ip_hash.decode(),
"user_agent_hash": user_agent_hash.decode(),
"captcha_pass": captcha_data["success"],
"dns_blacklisted": dsn_blacklist.blacklisted,
}
if FormFeatures.REQUIRES_LOGIN.value in form.features:
if request.user.is_authenticated:
response["user"] = request.user.payload
if FormFeatures.COLLECT_EMAIL.value in form.features and "email" not in response["user"]: # noqa
return JSONResponse({
"error": "email_required"
}, status_code=400)
else:
return JSONResponse({
"error": "missing_discord_data"
}, status_code=400)
missing_fields = []
for question in form.questions:
if question.id not in response["response"]:
missing_fields.append(question.id)
if missing_fields:
return JSONResponse({
"error": "missing_fields",
"fields": missing_fields
}, status_code=400)
try:
response_obj = FormResponse(**response)
except ValidationError as e:
return JSONResponse(e.errors(), status_code=422)
await request.state.db.responses.insert_one(
response_obj.dict(by_alias=True)
)
return JSONResponse({
"form": form.dict(),
"response": response_obj.dict()
})
else:
return JSONResponse({
"error": "Open form not found"
}, status_code=404)
|
