Add parameterized SQL queries with nginx variables
New Feature: sqlite_param Directive - Allows passing nginx variables as SQL prepared statement parameters - Supports query parameters ($arg_name), path captures ($1, $2), headers, etc. - Safe SQL injection protection via rusqlite prepared statements - Multiple parameters supported (bound in order to ? placeholders) Implementation: - New sqlite_param directive for adding query parameters - Variable resolution using ngx_http_get_variable() FFI - UTF-8 validation on all variable values - Updated execute_query() to accept parameter array - rusqlite::ToSql parameter binding Examples: - Book detail by ID: /book?id=1 - Genre filtering: /genre?genre=Programming - Year range search: /years?min=2015&max=2024 New Files: - conf/book_detail.conf: Parameter examples configuration - server_root/book/detail.hbs: Book detail page template - server_root/genre/genre.hbs: Genre filter page template - start_book_detail.sh: Quick start script for params example - README.md: Comprehensive project documentation - README_PARAMETERS.md: Parameters feature documentation Configuration: - MainConfig now supports global_templates_dir - ModuleConfig extended with query_params Vec - Handler resolves variables at request time - Template paths adjusted for exact location matches All examples tested and working with both static and parameterized queries.
This commit is contained in:
Edward Langley
140
server_root/book/detail.hbs
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140
server_root/book/detail.hbs
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{{> header}}
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<style>
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.book-detail {
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max-width: 800px;
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margin: 2rem auto;
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padding: 2rem;
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}
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.book-cover {
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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height: 300px;
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border-radius: 8px;
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display: flex;
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align-items: center;
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justify-content: center;
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color: white;
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font-size: 3rem;
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margin-bottom: 2rem;
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}
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.book-title {
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font-size: 2.5rem;
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color: #2d3748;
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margin-bottom: 0.5rem;
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}
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.book-author {
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font-size: 1.5rem;
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color: #667eea;
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margin-bottom: 2rem;
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}
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.book-meta {
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display: grid;
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grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
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gap: 1.5rem;
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margin-bottom: 2rem;
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}
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.meta-item {
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background: #f8f9fa;
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padding: 1rem;
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border-radius: 8px;
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border-left: 4px solid #667eea;
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}
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.meta-label {
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font-size: 0.875rem;
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color: #6c757d;
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text-transform: uppercase;
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margin-bottom: 0.5rem;
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}
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.meta-value {
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font-size: 1.25rem;
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color: #2d3748;
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font-weight: 600;
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}
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.book-description {
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background: #f8f9fa;
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padding: 2rem;
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border-radius: 8px;
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line-height: 1.8;
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font-size: 1.125rem;
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color: #4a5568;
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}
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.rating {
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display: inline-flex;
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align-items: center;
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gap: 0.5rem;
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}
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.stars {
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color: #fbbf24;
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font-size: 1.5rem;
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}
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.back-link {
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display: inline-block;
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margin-top: 2rem;
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padding: 0.75rem 1.5rem;
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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color: white;
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text-decoration: none;
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border-radius: 8px;
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font-weight: 500;
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transition: transform 0.2s;
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}
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.back-link:hover {
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transform: translateY(-2px);
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}
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.not-found {
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text-align: center;
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padding: 4rem 2rem;
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color: #6c757d;
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}
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</style>
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{{#if results.[0]}}
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{{#with results.[0]}}
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<div class="book-detail">
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<div class="book-cover">
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📖
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</div>
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<h1 class="book-title">{{title}}</h1>
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<p class="book-author">by {{author}}</p>
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<div class="book-meta">
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<div class="meta-item">
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<div class="meta-label">Rating</div>
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<div class="meta-value rating">
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<span class="stars">⭐</span>
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{{rating}} / 5.0
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</div>
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</div>
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<div class="meta-item">
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<div class="meta-label">Published</div>
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<div class="meta-value">{{year}}</div>
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</div>
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<div class="meta-item">
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<div class="meta-label">Genre</div>
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<div class="meta-value">{{genre}}</div>
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</div>
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<div class="meta-item">
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<div class="meta-label">ISBN</div>
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<div class="meta-value" style="font-family: monospace; font-size: 1rem;">{{isbn}}</div>
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</div>
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</div>
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<div class="book-description">
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<strong>About this book:</strong><br><br>
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{{description}}
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</div>
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<a href="/books/all" class="back-link">← Back to Catalog</a>
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</div>
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{{/with}}
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{{else}}
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<div class="not-found">
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<h2>Book Not Found</h2>
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<p>The requested book could not be found in our catalog.</p>
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<a href="/books/all" class="back-link">← Back to Catalog</a>
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</div>
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{{/if}}
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{{> footer}}
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111
server_root/genre/genre.hbs
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111
server_root/genre/genre.hbs
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{{> header}}
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<style>
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.book-grid {
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display: grid;
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grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
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gap: 1.5rem;
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margin-top: 1.5rem;
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}
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.book-card {
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background: #fff;
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border: 2px solid #e9ecef;
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border-radius: 8px;
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padding: 1.5rem;
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transition: all 0.3s;
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cursor: pointer;
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}
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.book-card:hover {
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transform: translateY(-4px);
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box-shadow: 0 8px 16px rgba(102, 126, 234, 0.2);
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border-color: #667eea;
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}
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.book-header {
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display: flex;
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justify-content: space-between;
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align-items: start;
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margin-bottom: 0.5rem;
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}
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.book-title {
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color: #2d3748;
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font-size: 1.25rem;
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margin-bottom: 0.25rem;
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flex: 1;
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}
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.book-rating {
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background: #fef3c7;
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color: #92400e;
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padding: 0.25rem 0.75rem;
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border-radius: 20px;
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font-weight: bold;
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font-size: 0.9rem;
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white-space: nowrap;
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margin-left: 0.5rem;
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}
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.book-author {
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color: #667eea;
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font-weight: 500;
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margin-bottom: 0.75rem;
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}
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.book-description {
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color: #4a5568;
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margin-bottom: 1rem;
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line-height: 1.5;
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}
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.book-details {
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display: flex;
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flex-wrap: wrap;
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gap: 0.5rem;
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font-size: 0.875rem;
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}
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.book-genre {
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background: #667eea;
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color: white;
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padding: 0.25rem 0.75rem;
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border-radius: 4px;
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font-weight: 500;
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}
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.book-year {
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background: #e9ecef;
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color: #495057;
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padding: 0.25rem 0.75rem;
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border-radius: 4px;
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}
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.book-isbn {
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color: #6c757d;
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font-family: monospace;
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font-size: 0.8rem;
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}
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.genre-header {
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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color: white;
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padding: 1.5rem;
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border-radius: 8px;
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margin-bottom: 2rem;
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}
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.genre-header h2 {
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font-size: 2rem;
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margin-bottom: 0.5rem;
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text-transform: capitalize;
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}
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</style>
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<div class="genre-header">
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<h2>{{#if results.[0]}}{{results.[0].genre}}{{else}}Genre{{/if}} Books</h2>
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<p>Browse books in this category</p>
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</div>
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<div class="book-grid">
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{{#each results}}
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<a href="/book/{{id}}" style="text-decoration: none; color: inherit;">
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{{> book_card}}
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</a>
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{{/each}}
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</div>
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{{#unless results}}
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<p style="text-align: center; color: #6c757d; padding: 2rem;">No books found in this genre.</p>
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{{/unless}}
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{{> footer}}
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122
server_root/list.hbs
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server_root/list.hbs
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{{> header}}
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<style>
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.book-grid {
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display: grid;
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grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
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gap: 1.5rem;
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margin-top: 1.5rem;
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}
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.book-card {
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background: #fff;
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border: 2px solid #e9ecef;
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border-radius: 8px;
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padding: 1.5rem;
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transition: all 0.3s;
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}
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.book-card:hover {
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transform: translateY(-4px);
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box-shadow: 0 8px 16px rgba(102, 126, 234, 0.2);
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border-color: #667eea;
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}
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.book-header {
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display: flex;
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justify-content: space-between;
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align-items: start;
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margin-bottom: 0.5rem;
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}
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.book-title {
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color: #2d3748;
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font-size: 1.25rem;
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margin-bottom: 0.25rem;
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flex: 1;
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}
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.book-rating {
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background: #fef3c7;
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color: #92400e;
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padding: 0.25rem 0.75rem;
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border-radius: 20px;
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font-weight: bold;
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font-size: 0.9rem;
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white-space: nowrap;
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margin-left: 0.5rem;
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}
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.book-author {
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color: #667eea;
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font-weight: 500;
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margin-bottom: 0.75rem;
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}
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.book-description {
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color: #4a5568;
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margin-bottom: 1rem;
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line-height: 1.5;
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}
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.book-details {
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display: flex;
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flex-wrap: wrap;
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gap: 0.5rem;
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font-size: 0.875rem;
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}
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.book-genre {
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background: #667eea;
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color: white;
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padding: 0.25rem 0.75rem;
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border-radius: 4px;
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font-weight: 500;
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}
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.book-year {
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background: #e9ecef;
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color: #495057;
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padding: 0.25rem 0.75rem;
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border-radius: 4px;
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}
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.book-isbn {
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color: #6c757d;
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font-family: monospace;
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font-size: 0.8rem;
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}
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.stats {
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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color: white;
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padding: 1.5rem;
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border-radius: 8px;
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margin-bottom: 2rem;
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display: flex;
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justify-content: space-around;
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text-align: center;
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}
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.stat-item h2 {
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font-size: 2.5rem;
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margin-bottom: 0.25rem;
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}
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.stat-item p {
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opacity: 0.9;
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font-size: 0.9rem;
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}
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</style>
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<div class="stats">
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<div class="stat-item">
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<h2>📚</h2>
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<p>Book Collection</p>
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</div>
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<div class="stat-item">
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<h2>⭐</h2>
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<p>Top Rated</p>
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</div>
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<div class="stat-item">
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<h2>🔍</h2>
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<p>Browse All</p>
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</div>
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</div>
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<h2 style="color: #2d3748; margin-bottom: 1rem;">All Books in Collection</h2>
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<div class="book-grid">
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{{#each results}}
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{{> book_card}}
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{{/each}}
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</div>
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{{> footer}}
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122
server_root/years/list.hbs
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122
server_root/years/list.hbs
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{{> header}}
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<style>
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.book-grid {
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display: grid;
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grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
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gap: 1.5rem;
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margin-top: 1.5rem;
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}
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.book-card {
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background: #fff;
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border: 2px solid #e9ecef;
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border-radius: 8px;
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padding: 1.5rem;
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transition: all 0.3s;
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}
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.book-card:hover {
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transform: translateY(-4px);
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box-shadow: 0 8px 16px rgba(102, 126, 234, 0.2);
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border-color: #667eea;
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}
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.book-header {
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display: flex;
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justify-content: space-between;
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align-items: start;
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margin-bottom: 0.5rem;
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}
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.book-title {
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color: #2d3748;
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font-size: 1.25rem;
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margin-bottom: 0.25rem;
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flex: 1;
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}
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.book-rating {
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background: #fef3c7;
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color: #92400e;
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padding: 0.25rem 0.75rem;
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border-radius: 20px;
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font-weight: bold;
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font-size: 0.9rem;
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white-space: nowrap;
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margin-left: 0.5rem;
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}
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.book-author {
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color: #667eea;
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font-weight: 500;
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margin-bottom: 0.75rem;
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}
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.book-description {
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color: #4a5568;
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margin-bottom: 1rem;
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line-height: 1.5;
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}
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.book-details {
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display: flex;
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flex-wrap: wrap;
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gap: 0.5rem;
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font-size: 0.875rem;
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}
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.book-genre {
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background: #667eea;
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color: white;
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padding: 0.25rem 0.75rem;
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border-radius: 4px;
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font-weight: 500;
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}
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.book-year {
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background: #e9ecef;
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color: #495057;
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padding: 0.25rem 0.75rem;
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border-radius: 4px;
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}
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.book-isbn {
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color: #6c757d;
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font-family: monospace;
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font-size: 0.8rem;
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}
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.stats {
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background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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color: white;
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padding: 1.5rem;
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border-radius: 8px;
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margin-bottom: 2rem;
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display: flex;
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justify-content: space-around;
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text-align: center;
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}
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.stat-item h2 {
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font-size: 2.5rem;
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margin-bottom: 0.25rem;
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}
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.stat-item p {
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opacity: 0.9;
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font-size: 0.9rem;
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}
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</style>
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<div class="stats">
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<div class="stat-item">
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<h2>📚</h2>
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<p>Book Collection</p>
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</div>
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<div class="stat-item">
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<h2>⭐</h2>
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<p>Top Rated</p>
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</div>
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<div class="stat-item">
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||||
<h2>🔍</h2>
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<p>Browse All</p>
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</div>
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</div>
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<h2 style="color: #2d3748; margin-bottom: 1rem;">All Books in Collection</h2>
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||||
<div class="book-grid">
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||||
{{#each results}}
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||||
{{> book_card}}
|
||||
{{/each}}
|
||||
</div>
|
||||
|
||||
{{> footer}}
|
||||
|
||||
Reference in New Issue
Block a user