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implement cgi interface
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GPG key ID:
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6 changed files with 235 additions and 6 deletions
117
src/cgi/smithy.cgi
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117
src/cgi/smithy.cgi
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#!/usr/bin/env -S uv run python
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import cgi, cgitb
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import sys, os
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import html
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import polars as pl
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sys.path.insert(0,
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os.path.abspath(
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os.path.join(
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os.path.dirname(os.path.abspath(__file__)), "../smithy/src"
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)
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)
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)
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from smithy import smith_set
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cgitb.enable()
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form = cgi.FieldStorage()
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if 'spreadsheet' in form:
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fileitem = form['spreadsheet']
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if fileitem.filename:
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filename = os.path.basename(fileitem.filename)
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filepath = os.path.join("/tmp", filename)
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with open(filepath, 'wb') as f:
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f.write(fileitem.file.read())
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print(f"<h2>Upload Successful!</h2>")
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try:
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if filename.endswith(".csv"):
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df = pl.read_csv(filepath)
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elif filename.endswith((".xlsx", ".xls")):
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df = pl.read_excel(filepath)
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else:
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message = """
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<h1>Error</h1>
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<p>File extension is not valid. Use CSV (.csv) or Excel (.xlsx, .xls).</p>
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<p><a href="../smithy.html">Go Back</a></p>
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"""
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# Normalize
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df = df.with_columns(
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[
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pl.col(c)
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.cast(pl.Utf8)
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.str.strip_chars()
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.cast(pl.Int64, strict=False)
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.fill_null(0)
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for c in df.columns
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]
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)
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smiths = smith_set(df) # Solve!
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message = """
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<h1>The Smith set winners are:</h1>
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{smiths}
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<p><a href="../smithy.html">Go Back</a></p>
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"""
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except Exception as e:
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message = """
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<h1>Error<h1>
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<p>Internal Error Encountered: {e}
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<p><a href="../smithy.html">Go Back</a></p>
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"""
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else:
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message = """
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<h1>Error</h1>
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<p>Filename not found/valid.</p>
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<p><a href="../smithy.html">Go Back</a></p>
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"""
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else:
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message = """
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<h1>Error</h1>
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<p>No file field found in the form.</p>
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<p><a href="../smithy.html">Go Back</a></p>
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"""
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response = f"""
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title> Smithy - RCV Ballot Counter </title>
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<style>
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body {
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font-family: Arial, sans-serif;
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max-width: 600px;
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margin: 40px auto;
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padding: 20px;
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}
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h1 {
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font-size: 24px;
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margin-bottom: 20px;
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}
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</style>
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</head>
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<body>
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{message}
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</body>
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<footer>
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<hr>
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<p>Author: <a href="https://pages.uoregon.edu/tgorordo">Thomas (Tom) C. Gorordo</a>
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Source: <a href="https://github.com/tgorordo/pages.uoregon.edu">pages.uoregon.edu/tgorordo</a>,
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<a href="https://github.com/tgorordo/smithy">smithy</a></p>
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</footer>
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"""
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print(response)
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101
src/cgi/smithy.html
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101
src/cgi/smithy.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title> Smithy - RCV Ballot Counter </title>
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<style>
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body {
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font-family: Arial, sans-serif;
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max-width: 600px;
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margin: 40px auto;
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padding: 20px;
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}
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h1 {
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font-size: 24px;
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margin-bottom: 20px;
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}
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label {
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display: block;
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margin-bottom: 8px;
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}
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input[type="file"] {
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margin-bottom: 15px;
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}
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input[type="submit"] {
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padding: 8px 16px;
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}
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</style>
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</head>
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<body>
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<h1>Smithy: RCV Ballot Counter - CGI Application Upload</h1>
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<div class="form-container">
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<form action="/files/forms/smithy.cgi" method="POST" enctype="multipart/form-data">
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<label for="spreadsheet">Upload a ballot-box spreadsheet (.xlsx, .xls, .csv):</label>
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<input type="file" id="spreadsheet" name="spreadsheet" accept=".xlsx,.xls,.csv" required>
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<br>
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<input type="submit" value="Upload and Solve!">
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</form>
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</div>
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<div class="explanation-container">
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<h2>About</h2>
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<p>This is an upload form for the <a href="https://github.com/tgorordo/smithy">smithy</a> RCV Ballot counter for identifying the Smith set (majority winners) in small elections,
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mainly to help with UO Physics Grad student elections of various flavors. This form uses the <a href="https://service.uoregon.edu/TDClient/2030/Portal/KB/ArticleDet?ID=43069">UO pages.uoregon.edu CGI Capability</a>,
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so the implementation of smithy being invoked can be <a href="https://pages.uoregon.edu/tgorordo/files/smithy/"> inspected here</a>
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and you may also inspect the source of this page to verify that <a href="https://pages.uoregon.edu/tgorordo/files/forms/smithy.cgi">this script<a> is called to invoke it.
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</p>
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<p> The <a href="https://en.wikipedia.org/wiki/Smith_set">Smith set</a> is the minimal set of candidates which can beat all others pairwise (by majority ranking)
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- if there is a single winner in the set they are guaranteed the standard <a href=https://en.wikipedia.org/wiki/Condorcet_winner>Condorcet i.e. Majority winner</a>
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(they beat all others pairwise).</p>
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<h3>Input: Expected Spreadsheet Format</h3>
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<p>A ballot-box spreadsheet should be organized by columns as candidates and rows as numerical rankings of the candidates -
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i.e. each row is the ranking provided by the ballot of a voter,
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e.g.:</p>
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<p>
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<table>
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<tr>
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<th>Alice</th>
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<th>Bob</th>
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<th>Charlie</th>
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</tr>
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<tr>
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<td>1</td>
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<td>2</td>
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<td>3</td>
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</tr>
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<tr>
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<td>2</td>
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<td>1</td>
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<td>3</td>
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</tr>
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<tr>
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<td>1</td>
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<td>3</td>
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<td>2</td>
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</tr>
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<tr>
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<td>3</td>
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<td>1</td>
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<td>2</td>
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</tr>
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</table>
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(which has, as its Smith set a tie between "Alice" and "Bob")</p>
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<h3>Output: Smith Set Format</h3>
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<p>The form will return a list of the Smith-set winners sorted lexicographically (they are all equally good majority winners).
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It might be helpful for clarity to provide the input sheet's columns already in lexicographic order, but this is not required. </p>
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</div>
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</body>
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<footer>
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<hr>
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<p>Author: <a href="https://pages.uoregon.edu/tgorordo">Thomas (Tom) C. Gorordo</a>
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Source: <a href="https://github.com/tgorordo/pages.uoregon.edu">pages.uoregon.edu/tgorordo</a>,
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<a href="https://github.com/tgorordo/smithy">smithy</a></p>
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</footer>
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</html>
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