Simplify webapp and handle both local dev and deployed URLs

web_query_builder/app.py

@@ -1,13 +1,11 @@
+import os
+
 from flask import (
     Flask,
     render_template,
     request,
-    redirect,
-    Response,
 )
-import requests
 from flask_cors import CORS
-
 from werkzeug.middleware.proxy_fix import ProxyFix
 
 app = Flask(__name__)
@@ -28,28 +26,5 @@ config = {}
 
 @app.route("/")
 def index():
-    return render_template("index.html", request = request, config = config)
-
-
-
-# @app.route('/stac', methods=["GET", "POST"])  # ref. https://medium.com/@zwork101/making-a-flask-proxy-server-online-in-10-lines-of-code-44b8721bca6
-# def redirect_to_API_HOST():  #NOTE var :subpath will be unused as all path we need will be read from :request ie from flask import request
-#     url = f'http://localhost:8124/stac'
-#     res = requests.request(  # ref. https://stackoverflow.com/a/36601467/248616
-#         method          = request.method,
-#         url             = url,
-#         headers         = {k:v for k,v in request.headers if k.lower() != 'host'}, # exclude 'host' header
-#         data            = request.get_data(),
-#         cookies         = request.cookies,
-#         allow_redirects = False,
-#     )
-
-#     excluded_headers = ['content-encoding', 'content-length', 'transfer-encoding', 'connection']  #NOTE we here exclude all "hop-by-hop headers" defined by RFC 2616 section 13.5.1 ref. https://www.rfc-editor.org/rfc/rfc2616#section-13.5.1
-#     headers          = [
-#         (k,v) for k,v in res.raw.headers.items()
-#         if k.lower() not in excluded_headers
-#     ]
-
-#     response = Response(res.content, res.status_code, headers)
-#     return response
+    return render_template("index.html", request = request, config = config, api_url = os.environ.get("API_URL", "/api/stac"))
 

web_query_builder/run.sh

@@ -1 +1,2 @@
+export API_URL="http://127.0.0.1:8124/api/stac"
 flask run --debug --port=5006

web_query_builder/static/app.js

@@ -5,8 +5,14 @@ function getSTACUrlFromQuery() {
   const params = new URLSearchParams(window.location.search);
 
   // get current window url and remove path part
-  let api_url = new URL(window.location.href);
-  api_url.pathname = "/api/stac";
+  if (window.API_URL.startsWith("http")) {
+    // Absolute URL: Use it directly
+    api_url = new URL(window.API_URL);
+  } else {
+    // Relative URL: Combine with the current window's location
+    api_url = new URL(window.location.href);
+    api_url.pathname = window.API_URL;
+  }
 
   for (const [key, value] of params.entries()) {
     api_url.searchParams.set(key, value);

web_query_builder/templates/index.html

@@ -53,6 +53,9 @@
         </div>
     </div>
 
+    <script>
+        window.API_URL = "{{ api_url }}";
+    </script>
     <script src="/static/app.js"></script>
 </body>
 </html>