Daangn Cars Search

#!/usr/bin/env python3
import argparse, json, re, sys, urllib.parse, urllib.request
from html import unescape

HEADERS = {"User-Agent":"Mozilla/5.0", "Accept":"application/json,text/html;q=0.9,*/*;q=0.8"}

def fetch_json(url):
    req = urllib.request.Request(url, headers=HEADERS)
    with urllib.request.urlopen(req, timeout=25) as r:
        return json.load(r)

def fetch_text(url):
    req = urllib.request.Request(url, headers={"User-Agent":"Mozilla/5.0", "Accept":"text/html"})
    with urllib.request.urlopen(req, timeout=25) as r:
        return r.read().decode('utf-8', 'ignore')

def won(v):
    if v in (None, ''): return '-'
    try: return f"{int(float(v)):,}원"
    except Exception: return str(v)

def resolve_region(region):
    if not region: return None
    url = 'https://www.daangn.com/kr/api/v1/regions/keyword?keyword=' + urllib.parse.quote(region)
    data = fetch_json(url)
    locs = data.get('locations') or []
    if not locs: raise SystemExit(f'지역 후보 없음: {region}')
    # Exact dong/name match first, then Seoul depth-3, then first candidate.
    exact = [x for x in locs if region in (x.get('name'), x.get('name1'), x.get('name2'), x.get('name3'))]
    seoul = [x for x in locs if x.get('name1') == '서울특별시' and x.get('depth') == 3]
    sel = (exact or seoul or locs)[0]
    return sel

def region_param(sel):
    return urllib.parse.quote(f"{sel['name']}-{sel['id']}")

def absolute(href):
    if not href: return ''
    if href.startswith('http'): return href
    return 'https://www.daangn.com' + href

def print_json(obj):
    print(json.dumps(obj, ensure_ascii=False, indent=2))


def cmd_search(args):
    sel=resolve_region(args.region) if args.region else None
    params=[]
    if sel: params.append(('in', f"{sel['name']}-{sel['id']}"))
    if args.only_on_sale: params.append(('onlyOnSale','1'))
    if args.price_max: params.append(('priceMax', str(args.price_max)))
    if args.price_min: params.append(('priceMin', str(args.price_min)))
    params.append(('_data','routes/kr.cars._index'))
    url='https://www.daangn.com/kr/cars/?'+urllib.parse.urlencode(params)
    data=fetch_json(url); arr=((data.get('carAllPage') or {}).get('carPosts') or [])
    if args.keyword:
        arr=[a for a in arr if args.keyword.lower() in (a.get('title') or '').lower()]
    arr=arr[:args.limit]
    items=[{'title':a.get('title'),'price':a.get('price'),'price_text':won(a.get('price')),'region':(a.get('region') or {}).get('name'),
            'status':a.get('status'),'driveDistance':a.get('driveDistance'),'carData':a.get('carData'),
            'chatRoomCount':a.get('chatRoomCount'),'url':absolute(a.get('href'))} for a in arr]
    print_json({'source':url,'effective_region':data.get('searchRegion') or sel,'count':len(items),'items':items})

def cmd_detail(args):
    u=args.url.rstrip('/')+'/?_data=routes%2Fkr.cars.%24car_post_id'
    data=fetch_json(u); print_json({'source':u,'carPost':data.get('carPost') or data})

p=argparse.ArgumentParser(description='Daangn cars read-only search/detail')
sub=p.add_subparsers(dest='cmd', required=True)
s=sub.add_parser('search'); s.add_argument('keyword', nargs='?'); s.add_argument('--region'); s.add_argument('--price-min',type=int); s.add_argument('--price-max',type=int); s.add_argument('--only-on-sale',action='store_true',default=True); s.add_argument('--limit',type=int,default=10); s.set_defaults(func=cmd_search)
d=sub.add_parser('detail'); d.add_argument('url'); d.set_defaults(func=cmd_detail)
args=p.parse_args(); args.func(args)