Implementation
This commit is contained in:
Mateusz Grzegorzewski
parent
31774712fb
commit
170459121e
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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 1,
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"metadata": {},
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"outputs": [],
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"source": [
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"import os\n",
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"import sys\n",
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"import random\n",
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"import string\n",
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"\n",
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"sys.path.append(\"ProjectToFuzzTest\")\n",
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"from jsonparse import value_parser"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Total tests: 100000\n",
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"Successful tests: 94361\n",
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"Failed tests: 5639\n"
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]
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}
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],
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"source": [
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"def generate_random_json(depth=0, max_depth=5, valid=True):\n",
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" if depth >= max_depth:\n",
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" choice = random.choice([\"null\", \"boolean\", \"number\", \"string\"])\n",
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" else:\n",
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" choice = random.choice([\"null\", \"boolean\", \"number\", \"string\", \"array\", \"object\"])\n",
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"\n",
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" if choice == \"null\":\n",
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" return \"null\"\n",
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" elif choice == \"boolean\":\n",
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" return random.choice([\"true\", \"false\"])\n",
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" elif choice == \"number\":\n",
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" return str(random.uniform(-1e6, 1e6))\n",
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" elif choice == \"string\":\n",
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" return '\"' + ''.join(random.choices(string.ascii_letters + string.digits, k=10)) + '\"'\n",
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" elif choice == \"array\":\n",
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" return '[' + ', '.join(generate_random_json(depth + 1, max_depth, valid) for _ in range(random.randint(0, 5))) + ']'\n",
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" elif choice == \"object\":\n",
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" return '{' + ', '.join(f'\"{random.choice(string.ascii_letters)}\": {generate_random_json(depth + 1, max_depth, valid)}' for _ in range(random.randint(0, 5))) + '}'\n",
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"\n",
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"def introduce_common_json_errors(json_str):\n",
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" error_choice = random.choice([\"missing_quote\", \"missing_bracket\", \"extra_comma\", \"trailing_comma\"])\n",
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" \n",
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" if error_choice == \"missing_quote\":\n",
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" pos = json_str.find('\"')\n",
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" if pos != -1:\n",
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" return json_str[:pos] + json_str[pos+1:]\n",
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" elif error_choice == \"missing_bracket\":\n",
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" if \"{\" in json_str or \"[\" in json_str:\n",
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" return json_str[:-1]\n",
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" elif error_choice == \"extra_comma\":\n",
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" if \"{\" in json_str or \"[\" in json_str:\n",
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" return json_str[:-1] + \",\"\n",
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" elif error_choice == \"trailing_comma\":\n",
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" if \"{\" in json_str or \"[\" in json_str:\n",
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" parts = json_str.split(\",\")\n",
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" return \",\".join(parts[:-1]) + \",\"\n",
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"\n",
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" return json_str\n",
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"\n",
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"def generate_test_json():\n",
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" if random.choice([True, False]):\n",
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" return generate_random_json(valid=True)\n",
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" else:\n",
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" valid_json = generate_random_json(valid=True)\n",
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" return introduce_common_json_errors(valid_json)\n",
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"\n",
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"def log_result(test_input, result, error, log_file):\n",
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" with open(log_file, 'a') as f:\n",
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" if error:\n",
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" f.write(f\"Input: {test_input}\\nException: {error}\\n\\n\")\n",
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" else:\n",
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" f.write(f\"Input: {test_input}\\nOutput: {result}\\n\\n\")\n",
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"\n",
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"def analyze_logs(log_file):\n",
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" total_tests = 0\n",
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" successful_tests = 0\n",
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" failed_tests = 0\n",
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" with open(log_file, 'r') as f:\n",
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" logs = f.read().split(\"\\n\\n\")\n",
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" total_tests = len(logs) - 1\n",
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" for log in logs:\n",
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" if \"Exception\" in log:\n",
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" failed_tests += 1\n",
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" elif \"Output\" in log:\n",
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" successful_tests += 1\n",
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" return total_tests, successful_tests, failed_tests\n",
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"\n",
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"def run_fuzzer(parser, num_tests=100, log_file='fuzzer_log.txt'):\n",
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" if os.path.exists(log_file):\n",
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" os.remove(log_file)\n",
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" for _ in range(num_tests):\n",
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" test_input = generate_test_json()\n",
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" try:\n",
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" result = parser(test_input)\n",
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" if result is None:\n",
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" log_result(test_input, \"None\", None, log_file)\n",
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" else:\n",
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" log_result(test_input, result[0], None, log_file)\n",
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" except Exception as e:\n",
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" log_result(test_input, None, e, log_file)\n",
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" total_tests, successful_tests, failed_tests = analyze_logs(log_file)\n",
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" print(f\"Total tests: {total_tests}\")\n",
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" print(f\"Successful tests: {successful_tests}\")\n",
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" print(f\"Failed tests: {failed_tests}\")\n",
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"\n",
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"run_fuzzer(value_parser, num_tests=100_000)"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "base",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.9.19"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}
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Load Diff
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{"widget": {
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"debug": "on",
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"window": {
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"title": "Sample Konfabulator Widget",
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"name": "main_window",
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"width": 500,
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"height": 500
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},
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"image": {
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"src": "Images/Sun.png",
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"name": "sun1",
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"hOffset": 250,
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"vOffset": 250,
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"alignment": "center"
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},
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"text": {
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"data": "Click Here",
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"size": 36,
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"style": "bold",
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"name": "text1",
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"hOffset": 250,
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"vOffset": 100,
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"alignment": "center",
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"onMouseUp": "sun1.opacity = (sun1.opacity / 100) * 90;"
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}
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}}
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{
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"id": "0001",
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"type": "donut",
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"name": "Cake",
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"ppu": 0.55,
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"batters":
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{
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"batter":
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[
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{ "id": "1001", "type": "Regular" },
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{ "id": "1002", "type": "Chocolate" },
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{ "id": "1003", "type": "Blueberry" },
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{ "id": "1004", "type": "Devil's Food" }
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]
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},
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"topping":
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[
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{ "id": "5001", "type": "None" },
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{ "id": "5002", "type": "Glazed" },
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{ "id": "5005", "type": "Sugar" },
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{ "id": "5007", "type": "Powdered Sugar" },
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{ "id": "5006", "type": "Chocolate with Sprinkles" },
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{ "id": "5003", "type": "Chocolate" },
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{ "id": "5004", "type": "Maple" }
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]
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}
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[
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{
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"id": "0001",
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"type": "donut",
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"name": "Cake",
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"ppu": 0.55,
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"batters":
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{
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"batter":
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[
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{ "id": "1001", "type": "Regular" },
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{ "id": "1002", "type": "Chocolate" },
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{ "id": "1003", "type": "Blueberry" },
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{ "id": "1004", "type": "Devil's Food" }
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]
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},
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"topping":
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[
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{ "id": "5001", "type": "None" },
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{ "id": "5002", "type": "Glazed" },
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{ "id": "5005", "type": "Sugar" },
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{ "id": "5007", "type": "Powdered Sugar" },
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{ "id": "5006", "type": "Chocolate with Sprinkles" },
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{ "id": "5003", "type": "Chocolate" },
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{ "id": "5004", "type": "Maple" }
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]
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},
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{
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"id": "0002",
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"type": "donut",
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"name": "Raised",
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"ppu": 0.55,
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"batters":
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{
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"batter":
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[
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{ "id": "1001", "type": "Regular" }
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]
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},
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"topping":
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[
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{ "id": "5001", "type": "None" },
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{ "id": "5002", "type": "Glazed" },
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{ "id": "5005", "type": "Sugar" },
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{ "id": "5003", "type": "Chocolate" },
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{ "id": "5004", "type": "Maple" }
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]
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},
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{
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"id": "0003",
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"type": "donut",
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"name": "Old Fashioned",
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"ppu": 0.55,
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"batters":
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{
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"batter":
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[
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{ "id": "1001", "type": "Regular" },
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{ "id": "1002", "type": "Chocolate" }
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]
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},
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"topping":
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[
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{ "id": "5001", "type": "None" },
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{ "id": "5002", "type": "Glazed" },
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{ "id": "5003", "type": "Chocolate" },
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{ "id": "5004", "type": "Maple" }
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]
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}
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]
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{"web-app": {
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"servlet": [
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{
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"servlet-name": "cofaxCDS",
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"servlet-class": "org.cofax.cds.CDSServlet",
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"init-param": {
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"configGlossary:installationAt": "Philadelphia, PA",
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"configGlossary:adminEmail": "ksm@pobox.com",
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"configGlossary:poweredBy": "Cofax",
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"configGlossary:poweredByIcon": "/images/cofax.gif",
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"configGlossary:staticPath": "/content/static",
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"templateProcessorClass": "org.cofax.WysiwygTemplate",
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"templateLoaderClass": "org.cofax.FilesTemplateLoader",
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"templatePath": "templates",
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"templateOverridePath": "",
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"defaultListTemplate": "listTemplate.htm",
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"defaultFileTemplate": "articleTemplate.htm",
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"useJSP": false,
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"jspListTemplate": "listTemplate.jsp",
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"jspFileTemplate": "articleTemplate.jsp",
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"cachePackageTagsTrack": 200,
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"cachePackageTagsStore": 200,
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"cachePackageTagsRefresh": 60,
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"cacheTemplatesTrack": 100,
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"cacheTemplatesStore": 50,
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"cacheTemplatesRefresh": 15,
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"cachePagesTrack": 200,
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"cachePagesStore": 100,
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"cachePagesRefresh": 10,
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"cachePagesDirtyRead": 10,
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"searchEngineListTemplate": "forSearchEnginesList.htm",
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"searchEngineFileTemplate": "forSearchEngines.htm",
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"searchEngineRobotsDb": "WEB-INF/robots.db",
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"useDataStore": true,
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"dataStoreClass": "org.cofax.SqlDataStore",
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"redirectionClass": "org.cofax.SqlRedirection",
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"dataStoreName": "cofax",
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"dataStoreDriver": "com.microsoft.jdbc.sqlserver.SQLServerDriver",
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"dataStoreUrl": "jdbc:microsoft:sqlserver://LOCALHOST:1433;DatabaseName=goon",
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"dataStoreUser": "sa",
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"dataStorePassword": "dataStoreTestQuery",
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"dataStoreTestQuery": "SET NOCOUNT ON;select test='test';",
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"dataStoreLogFile": "/usr/local/tomcat/logs/datastore.log",
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"dataStoreInitConns": 10,
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"dataStoreMaxConns": 100,
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"dataStoreConnUsageLimit": 100,
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"dataStoreLogLevel": "debug",
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"maxUrlLength": 500}},
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{
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"servlet-name": "cofaxEmail",
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"servlet-class": "org.cofax.cds.EmailServlet",
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"init-param": {
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"mailHost": "mail1",
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"mailHostOverride": "mail2"}},
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{
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"servlet-name": "cofaxAdmin",
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"servlet-class": "org.cofax.cds.AdminServlet"},
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{
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"servlet-name": "fileServlet",
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"servlet-class": "org.cofax.cds.FileServlet"},
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{
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"servlet-name": "cofaxTools",
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"servlet-class": "org.cofax.cms.CofaxToolsServlet",
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"init-param": {
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"templatePath": "toolstemplates/",
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"log": 1,
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"logLocation": "/usr/local/tomcat/logs/CofaxTools.log",
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"logMaxSize": "",
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"dataLog": 1,
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"dataLogLocation": "/usr/local/tomcat/logs/dataLog.log",
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"dataLogMaxSize": "",
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"removePageCache": "/content/admin/remove?cache=pages&id=",
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"removeTemplateCache": "/content/admin/remove?cache=templates&id=",
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"fileTransferFolder": "/usr/local/tomcat/webapps/content/fileTransferFolder",
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"lookInContext": 1,
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"adminGroupID": 4,
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"betaServer": true}}],
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"servlet-mapping": {
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"cofaxCDS": "/",
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"cofaxEmail": "/cofaxutil/aemail/*",
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"cofaxAdmin": "/admin/*",
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"fileServlet": "/static/*",
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"cofaxTools": "/tools/*"},
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"taglib": {
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"taglib-uri": "cofax.tld",
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"taglib-location": "/WEB-INF/tlds/cofax.tld"}}}
|
||||||
|
|
@ -0,0 +1,3 @@
|
||||||
|
{
|
||||||
|
"welcome": -0.5e2,
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,110 @@
|
||||||
|
from functools import reduce
|
||||||
|
import re
|
||||||
|
import pprint
|
||||||
|
|
||||||
|
|
||||||
|
def array_parser(data):
|
||||||
|
if data[0] != "[":
|
||||||
|
return None
|
||||||
|
parse_list = []
|
||||||
|
data = data[1:].strip()
|
||||||
|
while len(data):
|
||||||
|
res = value_parser(data)
|
||||||
|
if res is None:
|
||||||
|
return None
|
||||||
|
parse_list.append(res[0])
|
||||||
|
data = res[1].strip()
|
||||||
|
if data[0] == "]":
|
||||||
|
return [parse_list, data[1:].strip()]
|
||||||
|
res = comma_parser(data)
|
||||||
|
if res is None:
|
||||||
|
return None
|
||||||
|
data = res[1].strip()
|
||||||
|
|
||||||
|
|
||||||
|
def boolean_parser(data):
|
||||||
|
if data[0:4] == "true":
|
||||||
|
return [True, data[4:].strip()]
|
||||||
|
elif data[0:5] == "false":
|
||||||
|
return [False, data[5:].strip()]
|
||||||
|
|
||||||
|
|
||||||
|
def colon_parser(data):
|
||||||
|
if data[0] == ":":
|
||||||
|
return [data[0], data[1:].lstrip()]
|
||||||
|
|
||||||
|
|
||||||
|
def comma_parser(data):
|
||||||
|
if data and data[0] == ",":
|
||||||
|
return [data[0], data[1:].strip()]
|
||||||
|
|
||||||
|
|
||||||
|
def null_parser(data):
|
||||||
|
if data[0:4] == "null":
|
||||||
|
return [None, data[4:].strip()]
|
||||||
|
|
||||||
|
|
||||||
|
def number_parser(data):
|
||||||
|
regex_find = re.findall("^(-?(?:[0-9]\d*)(?:\.\d+)?(?:[eE][+-]?\d+)?)",
|
||||||
|
data)
|
||||||
|
if not regex_find:
|
||||||
|
return None
|
||||||
|
pos = len(regex_find[0])
|
||||||
|
try:
|
||||||
|
return [int(regex_find[0]), data[pos:].strip()]
|
||||||
|
except ValueError:
|
||||||
|
return [float(regex_find[0]), data[pos:].strip()]
|
||||||
|
|
||||||
|
|
||||||
|
def object_parser(data):
|
||||||
|
if data[0] != "{":
|
||||||
|
return None
|
||||||
|
parse_dict = {}
|
||||||
|
data = data[1:].strip()
|
||||||
|
while data[0] != "}":
|
||||||
|
res = string_parser(data)
|
||||||
|
if res is None:
|
||||||
|
return None
|
||||||
|
id = res[0]
|
||||||
|
res = colon_parser(res[1].strip())
|
||||||
|
if res is None:
|
||||||
|
return None
|
||||||
|
res = value_parser(res[1].strip())
|
||||||
|
if res is None:
|
||||||
|
return None
|
||||||
|
parse_dict[id] = res[0]
|
||||||
|
data = res[1].lstrip()
|
||||||
|
res = comma_parser(data)
|
||||||
|
if res:
|
||||||
|
data = res[1].strip()
|
||||||
|
return [parse_dict, data[1:]]
|
||||||
|
|
||||||
|
|
||||||
|
def string_parser(data):
|
||||||
|
if data[0] == '"':
|
||||||
|
data = data[1:]
|
||||||
|
pos = data.find('"')
|
||||||
|
return [data[:pos], data[pos + 1:].strip()]
|
||||||
|
|
||||||
|
|
||||||
|
def all_parsers(*args):
|
||||||
|
return lambda data: (reduce(lambda f, g: f if f(data) else g, args)(data))
|
||||||
|
|
||||||
|
|
||||||
|
value_parser = all_parsers(null_parser, number_parser, boolean_parser,
|
||||||
|
string_parser, object_parser, array_parser)
|
||||||
|
|
||||||
|
|
||||||
|
def main():
|
||||||
|
file_name = "PBK\Fuzzing\ProjectToFuzzTest\Examples\ex1.json"
|
||||||
|
with open(file_name, "r") as f:
|
||||||
|
data = f.read()
|
||||||
|
res = value_parser(data.strip())
|
||||||
|
try:
|
||||||
|
pprint.pprint(res[0])
|
||||||
|
except TypeError:
|
||||||
|
print(None)
|
||||||
|
|
||||||
|
|
||||||
|
if __name__ == "__main__":
|
||||||
|
main()
|
||||||
31
README.md
31
README.md
|
|
@ -1,2 +1,31 @@
|
||||||
# Fuzzer
|
# Projekt - Podstawy bezpieczeństwa komputerowego
|
||||||
|
|
||||||
|
W ramach projektu zaimplementowany zostały fuzzer do testowania JSON parsera. <br>
|
||||||
|
Implementacja JSON parsera znajduje się na githubie: https://github.com/geekskool/python-json-parser
|
||||||
|
|
||||||
|
## Opis działania fuzzera
|
||||||
|
Fuzzer w losowy sposób generuje poprawne JSON-y, a następnie wprowadza do nich popularne błędy, aby sprawdzić, jak parser radzi sobie z niepoprawnymi danymi. Popularne błędy obejmują:
|
||||||
|
- brakujące zamknięcie cudzysłowu.
|
||||||
|
- brakujące zamknięcie nawiasu klamrowego lub kwadratowego.
|
||||||
|
- dodatkowy przecinek na końcu listy lub obiektu.
|
||||||
|
- brakujący dwukropek w obiekcie.
|
||||||
|
|
||||||
|
Wyniki testów są zapisywane do pliku logów, a następnie analizowane, aby ocenić skuteczność parsera.
|
||||||
|
|
||||||
|
## Wynik przeprowadzonych testów
|
||||||
|
Przeprowadzono 100,000 testów, które trwały 28 sekund.
|
||||||
|
- Powiodło się 94,361 testów.
|
||||||
|
- Nie przeszło 5,639 testów.
|
||||||
|
|
||||||
|
## Wnioski
|
||||||
|
Wszystkie JSON-y, które nie zostały celowo "zepsute" poprzez wprowadzenie popularnych błędów, przeszły testy pomyślnie. Oznacza to, że algorytm jest w stanie poprawnie sparsować każdy poprawny JSON niezależnie od danych wewnątrz.
|
||||||
|
|
||||||
|
JSON-y zawierające typowe błędy, takie jak:
|
||||||
|
- niedomknięty cudzysłów,
|
||||||
|
- podwójny przecinek,
|
||||||
|
- brakujący nawias klamrowy,
|
||||||
|
- brakujący dwukropek w obiekcie,
|
||||||
|
|
||||||
|
spowodowały niepowodzenie testów.
|
||||||
|
|
||||||
|
Aby algorytm przeszedł wszystkie testy, należałoby dodać odpowiednią obsługę błędnych JSON-ów, co pozwoliłoby na wykrywanie i raportowanie tych błędów zamiast generowania wyjątków lub niepoprawnych wyników.
|
||||||
Loading…
Reference in New Issue