add web app

1 files changed, 73 insertions, 0 deletions

diff --git a/coupons_web.py b/coupons_web.py
new file mode 100644
index 0000000..16e89eb
--- /dev/null
+++ b/coupons_web.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+# Startdate: 2022-09-08
+# Improve:
+#    confirm date logic works.
+
+from flask import Flask, Response, request, url_for, render_template
+import json, sys, os
+# Load coupons from same directory as coupons_web.py
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+import coupons
+from urllib import parse
+
+app = Flask(__name__)
+config = coupons.Config()
+# satisfies mod_wsgi:
+application = app
+@app.route("/")
+def root():
+   set_cache_dir_from_apache_environ(request, config)
+   return render_template("index.html")
+
+def set_cache_dir_from_apache_environ(_request, _config):
+   """
+   Given the request and config objects, derive the SetEnv XDG_CACHE_HOME for coupons web app.
+   """
+   try:
+      cache_dir = _request.environ.get("XDG_CACHE_HOME")
+      if cache_dir is not None and cache_dir != _config.cache_dir:
+         print(f"DEBUG(web set_cache_dir): setting cache dir to {cache_dir}")
+         _config.cache_dir = cache_dir
+   except:
+      pass
+
+
+@app.route("/search/", methods=["GET","POST"])
+@app.route("/search/<searchstring>", methods=["GET"])
+def search(searchstring = ""):
+   """
+   Pass searchstring to fetch_and_search. Returns json unless html is requested.
+   Accepts parameters nocache=1 and date=YYYY-MM-DD
+   """
+   if request.method in ["POST"]:
+      searchstring = request.get_data().decode("utf-8")
+   set_cache_dir_from_apache_environ(request, config)
+   print(f"DEBUG(web search): {request}")
+   #print(f"DEBUG(web search): {request.method} searchstring={searchstring}")
+   force = False
+   nocache = request.args.get('nocache')
+   date = request.args.get('date') # in YYYY-MM-DD form
+   if nocache in ["1",1,"yes","YES","true","TRUE",True,"True","on"]:
+      print(f"DEBUG(web search): Caching is disabled for this request.")
+      force = True
+   results = []
+   for store in coupons.store_urls:
+      a = coupons.fetch_and_search(store = store, force = force, searchstring = searchstring, date = date, config = config)
+      if len(a) > 2: # an empty a is "{}" which is a string?!
+         results.append({store: json.loads(a)})
+   accept = request.headers.get("Accept")
+   from_js = True if request.headers.get("From") else False
+   #print(f"DEBUG(web search): Accept only type {accept}")
+   #print(f"DEBUG(web search): Results: {results}")
+   #print(f"DEBUG(web search): From_js is {from_js}")
+   if accept in ["text/html", "application/html"] or "text/html" in accept:
+      #print(f"DEBUG(web search): Must convert the json to html...")
+      savedlink = url_for("search") + searchstring # because url_for handles searchstring= weird
+      #print(f"DEBUG(web search): Preparing saved search link: {savedlink}")
+      return render_template("index.html", results = results, from_js = from_js, savedlink = savedlink)
+   else:
+      # json is default
+      return json.dumps(results),200
+
+if __name__ == "__main__":
+   app.run()