Initial commit

c003d969 · Sonia Zorba · c003d969 · c003d969 · c003d969 · c003d969
Commit c003d969 authored 3 years ago by Sonia Zorba
--- a/.gitignore
+++ b/.gitignore
+/venv
--- a/Dockerfile
+++ b/Dockerfile
+FROM python:3.9-buster
+
+COPY requirements.txt ./
+
+RUN pip install -r requirements.txt --extra-index-url https://www.ict.inaf.it/gitlab/api/v4/projects/670/packages/pypi/simple
+
+COPY server.py index.html script.js ./
+
+ENTRYPOINT ["python", "server.py"]
--- a/README.md
+++ b/README.md
+# Coords Service
+
+Toy Python server using [Coords Library](https://www.ict.inaf.it/gitlab/ci-intro/coords-library) to demonstrate GitLab CI features.
--- a/favicon.ico
+++ b/favicon.ico
--- a/index.html
+++ b/index.html
+<html>
+    <head>
+        <title>Coordinates calculator</title>
+        <!-- Bootstrap CSS -->
+        <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-eOJMYsd53ii+scO/bJGFsiCZc+5NDVN2yr8+0RDqr0Ql0h+rP48ckxlpbzKgwra6" crossorigin="anonymous" />
+        <!-- Fetch API polyfill, for supporting Internet Explorer -->
+        <script src="https://cdn.jsdelivr.net/npm/fetch-polyfill@0.8.2/fetch.min.js"></script>
+        <style>
+            .hide { display: none; }
+
+            .loading {
+                position: fixed;
+                top: 0;
+                bottom: 0;
+                right: 0;
+                left: 0;
+                background-color: rgba(255, 255, 255, 0.7);
+                z-index: 100000;
+            }
+
+            .spinner-wrapper {
+                display: flex;
+                justify-content: center;
+                align-items: center;
+                height: 100%;
+                width: 100%;
+            }
+
+            .spinner-border {
+                width: 3rem; height: 3rem;
+            }
+        </style>
+    </head>
+    <body>
+        <div class="container">
+            <div class="row mt-5">
+                <div class="col text-center">
+                    <h2>Coordinates for #LOCATION_NAME#</h2>
+                    <p class="fw-light">Using coords-library #LIB_VERSION#</p>
+                </div>
+            </div>
+            <div class="row">
+                <div class="col-6 offset-3">
+                    <div class="input-group mt-3 mb-3">
+                        <input type="text" class="form-control" id="object_name" placeholder="Object name" aria-label="Object name" aria-describedby="get_coordinates">
+                        <button class="btn btn-primary" type="button" id="get_coordinates">Get coordinates</button>
+                    </div>
+                    <div class="alert alert-danger hide" role="alert" id="error">
+                    </div>
+                    <div class="row hide" id="result">
+                        <div class="col">
+                            <ul id="result-list">
+                                <!-- results go here -->
+                            </ul>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+        <div id="loading" class="loading hide">
+            <div class="spinner-wrapper">
+                <div class="spinner-border text-info" role="status">
+                    <span class="visually-hidden">Loading...</span>
+                </div>
+            </div>
+        </div>
+        <script src="script.js"></script>
+    </body>
+</html>
\ No newline at end of file
--- a/requirements.txt
+++ b/requirements.txt
+coordslib
+astropy==4.2.1
+numpy==1.20.2
+pyerfa==1.7.2
--- a/script.js
+++ b/script.js
+function getCoordinates() {
+
+    // Previous results cleanup
+    document.getElementById('loading').classList.remove('hide');
+    document.getElementById('result').classList.add('hide');
+    document.getElementById('result-list').innerHTML = '';
+    document.getElementById('error').classList.add('hide');
+
+    // Retrieve object name
+    let objectName = document.getElementById('object_name').value;
+
+    // Call the server
+    fetch('coords?object=' + objectName)
+            .then(response => response.json())
+            .then(data => {
+                if (typeof data['error'] === 'undefined') {
+                    // Build results list
+                    let resultsHTML = '';
+                    for (let key in data) {
+                        resultsHTML += '<li><strong>' + key + '</strong>: ' + data[key] + '</li>';
+                    }
+                    document.getElementById('result-list').innerHTML = resultsHTML;
+                    document.getElementById('result').classList.remove('hide');
+                } else {
+                    // Show error
+                    let errorElement = document.getElementById('error');
+                    errorElement.classList.remove('hide');
+                    errorElement.innerText = data['error'];
+                }
+            })
+            .finally(() => {
+                document.getElementById('loading').classList.add('hide');
+            });
+}
+
+// Event handlers
+document.getElementById('get_coordinates').onclick = getCoordinates;
+
+document.getElementById('object_name').onkeydown = function(event) {
+    // Enter key event
+    if(event.keyCode === 13) {
+        getCoordinates();
+    }
+};
--- a/server.py
+++ b/server.py
+import http.server
+import socketserver
+import urllib.parse as urlparse
+from urllib.parse import parse_qs
+from importlib.metadata import version
+import json
+import sys
+import traceback
+import argparse
+import coords
+
+
+class CoordsHttpRequestHandler(http.server.SimpleHTTPRequestHandler):
+    def do_GET(self):
+        try:
+            if self.path == '/':
+                self.send_response(200)
+                self.send_header('Content-type', 'text/html')
+                self.end_headers()
+                # Open HTML page and replace placeholders
+                content = open('index.html', 'r').read()
+                location_name = coords.get_location_name(location_id)
+                content = content.replace('#LOCATION_NAME#', location_name)
+                content = content.replace('#LIB_VERSION#', version('coordslib'))
+                self.wfile.write(bytes(content, 'utf8'))
+                return
+            elif self.path.startswith('/coords'):
+                # extract 'object' query parameter from URL
+                parsed = urlparse.urlparse(self.path)
+                object_name = parse_qs(parsed.query)['object'][0]
+                # call coords library
+                result = coords.get_coords(object_name, location_id)
+                self.send_response(200)
+                self.send_json_response(result)
+                return
+        except Exception as ex:
+            print(traceback.format_exc(), file=sys.stderr)
+            # send error response
+            self.send_response(500)
+            self.send_json_response({'error': str(ex)})
+            return
+        # default server GET implementation (returns file or 404)
+        return http.server.SimpleHTTPRequestHandler.do_GET(self)
+
+    def send_json_response(self, data):
+        self.send_header('Content-type', 'application/json')
+        self.end_headers()
+        # write JSON data in HTTP response body
+        self.wfile.write(bytes(json.dumps(data) + '\n', 'utf8'))
+
+
+parser = argparse.ArgumentParser(description='Simple HTTP server that displays a form '
+                                             'to get astronomical coordinates for a given location')
+parser.add_argument('port', type=int, nargs=1, help='server port')
+parser.add_argument('location_id', type=str, nargs=1, help='astropy observatory/site identifier')
+args = parser.parse_args()
+port = args.port[0]
+location_id = args.location_id[0]
+
+# Create an object of the above class
+handler_object = CoordsHttpRequestHandler
+
+# Avoid 'address already in use' error on server restart
+socketserver.TCPServer.allow_reuse_address = True
+
+coords_server = socketserver.TCPServer(("", port), handler_object)
+
+# Start the server
+coords_server.serve_forever()