404 error for flask api.

ctf.nginx

@@ -7,7 +7,7 @@ server {
 	index index.html index.htm;
 
 	server_name localhost;
-	error_page 404 /404;
+	error_page 404 /index.html;
 
 	# location / {
 	# 	try_files $uri $uri/ =404;

server/api/user.py

@@ -1,4 +1,4 @@
-from flask import Blueprint, make_response, session, request, redirect, url_for, send_file
+from flask import Blueprint, make_response, session, request, redirect, url_for, send_file, abort
 from werkzeug import secure_filename
 from flask import current_app as app
 from voluptuous import Schema, Length, Required

server/app.py

@@ -1,7 +1,7 @@
 #!/usr/bin/python
 
 from argparse import ArgumentParser
-from flask import Flask
+from flask import Flask, send_file
 
 app = Flask(__name__)
 
@@ -40,6 +40,10 @@ api.logger.initialize_logs()
 def api_main():
 	return { "success": 1, "message": "The API is online." }
 
+@app.errorhandler(404)
+def page_not_found(e):
+    return send_file("../web/index.html")
+
 def run(args):
 	with app.app_context():
 		keyword_args = dict(args._get_kwargs())