Tilo15
/
astralis


			
				
					
						
						
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							using Astralis;
using Invercargill;
using Invercargill.DataStructures;

/**
 * FormData Example
 * 
 * Demonstrates handling POST form data in Astralis using async RouteHandler.
 * Shows both application/x-www-form-urlencoded and multipart/form-data handling.
 */

// HTML form page handler
class FormPageHandler : Object, RouteHandler {
    public async HttpResult handle_route(HttpContext context, RouteContext route_context) throws Error {
        return new HttpStringResult("""<!DOCTYPE html>
<html>
<head>
    <title>Form Data Example</title>
    <style>
        body { font-family: Arial, sans-serif; max-width: 600px; margin: 40px auto; padding: 20px; }
        h1 { color: #333; }
        .form-section { margin: 20px 0; padding: 15px; border: 1px solid #ddd; border-radius: 5px; }
        label { display: block; margin: 10px 0 5px; font-weight: bold; }
        input, textarea, select { width: 100%; padding: 8px; margin: 5px 0; box-sizing: border-box; }
        button { background: #007bff; color: white; padding: 10px 20px; border: none; border-radius: 5px; cursor: pointer; }
        button:hover { background: #0056b3; }
        a { color: #007bff; text-decoration: none; }
        a:hover { text-decoration: underline; }
    </style>
</head>
<body>
    <h1>Form Data Examples</h1>
    
    <div class="form-section">
        <h2>Simple Form (URL Encoded)</h2>
        <form action="/submit-simple" method="POST">
            <label for="name">Name:</label>
            <input type="text" id="name" name="name" required>
            
            <label for="email">Email:</label>
            <input type="email" id="email" name="email" required>
            
            <button type="submit">Submit</button>
        </form>
    </div>
    
    <div class="form-section">
        <h2>Registration Form (URL Encoded)</h2>
        <form action="/submit-register" method="POST">
            <label for="username">Username:</label>
            <input type="text" id="username" name="username" required>
            
            <label for="password">Password:</label>
            <input type="password" id="password" name="password" required>
            
            <label for="age">Age:</label>
            <input type="number" id="age" name="age" min="18" max="120">
            
            <label for="country">Country:</label>
            <select id="country" name="country">
                <option value="us">United States</option>
                <option value="uk">United Kingdom</option>
                <option value="nz">New Zealand</option>
                <option value="au">Australia</option>
            </select>
            
            <label for="bio">Bio:</label>
            <textarea id="bio" name="bio" rows="4"></textarea>
            
            <label>
                <input type="checkbox" name="newsletter" value="yes"> Subscribe to newsletter
            </label>
            
            <button type="submit">Register</button>
        </form>
    </div>
    
    <div class="form-section">
        <h2>Search Form (URL Encoded)</h2>
        <form action="/submit-search" method="POST">
            <label for="query">Search Query:</label>
            <input type="text" id="query" name="query" required>
            
            <label for="category">Category:</label>
            <select id="category" name="category">
                <option value="">All Categories</option>
                <option value="books">Books</option>
                <option value="electronics">Electronics</option>
                <option value="clothing">Clothing</option>
            </select>
            
            <label for="min_price">Min Price:</label>
            <input type="number" id="min_price" name="min_price" min="0" step="0.01">
            
            <label for="max_price">Max Price:</label>
            <input type="number" id="max_price" name="max_price" min="0" step="0.01">
            
            <button type="submit">Search</button>
        </form>
    </div>
    
    <div class="form-section">
        <h2>File Upload (Multipart)</h2>
        <form action="/submit-file" method="POST" enctype="multipart/form-data">
            <label for="description">Description:</label>
            <input type="text" id="description" name="description">
            
            <label for="file">File:</label>
            <input type="file" id="file" name="file">
            
            <button type="submit">Upload</button>
        </form>
    </div>
    
    <div class="form-section">
        <h2>Links</h2>
        <p><a href="/form-debug">Form Debug Tool</a></p>
    </div>
</body>
</html>""")
            .set_header("Content-Type", "text/html");
    }
}

// Simple form submission handler
class SimpleFormHandler : Object, RouteHandler {
    public async HttpResult handle_route(HttpContext context, RouteContext route_context) throws Error {
        if (!context.request.is_post()) {
            return new HttpStringResult("Please use POST method");
        }
        
        // Parse form data asynchronously from the request body
        FormData form_data = yield FormDataParser.parse(
            context.request.request_body,
            context.request.content_type
        );
        
        var name = form_data.get_field_or_default("name", "Anonymous");
        var email = form_data.get_field_or_default("email", "no-email@example.com");
        
        var parts = new Series<string>();
        parts.add("Form Submission Received!\n");
        parts.add("=========================\n\n");
        parts.add(@"Name: $name\n");
        parts.add(@"Email: $email\n");
        parts.add("\nAll form data:\n");
        
        form_data.fields.to_immutable_buffer()
            .iterate((grouping) => {
                grouping.iterate((value) => {
                    parts.add(@"  $(grouping.key): $value\n");
                });
            });
        
        var result = parts.to_immutable_buffer()
            .aggregate<string>("", (acc, s) => acc + s);
        
        return new HttpStringResult(result);
    }
}

// Registration form submission handler
class RegisterFormHandler : Object, RouteHandler {
    public async HttpResult handle_route(HttpContext context, RouteContext route_context) throws Error {
        if (!context.request.is_post()) {
            return new HttpStringResult("Please use POST method");
        }
        
        FormData form_data = yield FormDataParser.parse(
            context.request.request_body,
            context.request.content_type
        );
        
        var username = form_data.get_field("username");
        var password = form_data.get_field("password");
        var age_str = form_data.get_field_or_default("age", "0");
        var country = form_data.get_field_or_default("country", "us");
        var bio = form_data.get_field_or_default("bio", "");
        var newsletter = form_data.get_field("newsletter");
        
        // Validation
        if (username == null || username == "") {
            return new HttpStringResult(@"{ \"error\": \"Username is required\" }")
                .set_header("Content-Type", "application/json");
        }
        
        if (password == null || password == "") {
            return new HttpStringResult(@"{ \"error\": \"Password is required\" }")
                .set_header("Content-Type", "application/json");
        }
        
        var age = int.parse(age_str);
        if (age < 18) {
            return new HttpStringResult(@"{ \"error\": \"You must be at least 18 years old\" }")
                .set_header("Content-Type", "application/json");
        }
        
        // Build JSON response using Series
        var json_parts = new Series<string>();
        json_parts.add(@"{ \"success\": true, \"user\": {");
        json_parts.add(@"  \"username\": \"$username\",");
        json_parts.add(@"  \"age\": $age,");
        json_parts.add(@"  \"country\": \"$country\",");
        json_parts.add(@"  \"bio\": \"$(bio.replace("\"", "\\\""))\",");
        json_parts.add(@"  \"newsletter\": $(newsletter != null ? "true" : "false")");
        json_parts.add(@"} }");
        
        var json_string = json_parts.to_immutable_buffer()
            .aggregate<string>("", (acc, s) => acc + s);
        
        return new HttpStringResult(json_string)
            .set_header("Content-Type", "application/json");
    }
}

// Search form submission handler
class SearchFormHandler : Object, RouteHandler {
    public async HttpResult handle_route(HttpContext context, RouteContext route_context) throws Error {
        if (!context.request.is_post()) {
            return new HttpStringResult("Please use POST method");
        }
        
        FormData form_data = yield FormDataParser.parse(
            context.request.request_body,
            context.request.content_type
        );
        
        var query = form_data.get_field("query");
        var category = form_data.get_field_or_default("category", "");
        var min_price = double.parse(form_data.get_field_or_default("min_price", "0"));
        var max_price = double.parse(form_data.get_field_or_default("max_price", "999999"));
        
        if (query == null || query == "") {
            return new HttpStringResult(@"{ \"error\": \"Search query is required\" }")
                .set_header("Content-Type", "application/json");
        }
        
        // Simulated search results using Enumerable operations
        var all_products = new Series<Product>();
        all_products.add(new Product(1, "Book A", "books", 15.99));
        all_products.add(new Product(2, "Book B", "books", 24.99));
        all_products.add(new Product(3, "Laptop", "electronics", 999.99));
        all_products.add(new Product(4, "Phone", "electronics", 699.99));
        all_products.add(new Product(5, "Shirt", "clothing", 29.99));
        all_products.add(new Product(6, "Pants", "clothing", 49.99));
        
        // Filter results using Enumerable operations
        var results = all_products.to_immutable_buffer()
            .where(p => {
                var matches_query = p.name.down().contains(query.down());
                var matches_category = category == "" || p.category == category;
                var matches_price = p.price >= min_price && p.price <= max_price;
                return matches_query && matches_category && matches_price;
            });
        
        var json_parts = new Series<string>();
        json_parts.add(@"{ \"query\": \"$query\", \"category\": \"$category\", \"min_price\": $min_price, \"max_price\": $max_price, \"results\": [");
        
        bool first = true;
        results.iterate((product) => {
            if (!first) json_parts.add(", ");
            json_parts.add(product.to_json());
            first = false;
        });
        
        json_parts.add("] }");
        
        var json_string = json_parts.to_immutable_buffer()
            .aggregate<string>("", (acc, s) => acc + s);
        
        return new HttpStringResult(json_string)
            .set_header("Content-Type", "application/json");
    }
}

// File upload handler (multipart/form-data)
class FileUploadHandler : Object, RouteHandler {
    public async HttpResult handle_route(HttpContext context, RouteContext route_context) throws Error {
        if (!context.request.is_post()) {
            return new HttpStringResult("Please use POST method");
        }
        
        FormData form_data = yield FormDataParser.parse(
            context.request.request_body,
            context.request.content_type
        );
        
        var description = form_data.get_field_or_default("description", "");
        var file = form_data.get_file("file");
        
        var parts = new Series<string>();
        parts.add("File Upload Result\n");
        parts.add("==================\n\n");
        parts.add(@"Description: $description\n");
        
        if (file != null) {
            parts.add(@"\nFile Information:\n");
            parts.add(@"  Field Name: $(file.field_name)\n");
            parts.add(@"  Filename: $(file.filename)\n");
            parts.add(@"  Content-Type: $(file.content_type)\n");
            parts.add(@"  Size: $(file.data.length) bytes\n");
        } else {
            parts.add("\nNo file uploaded.\n");
        }
        
        var result = parts.to_immutable_buffer()
            .aggregate<string>("", (acc, s) => acc + s);
        
        return new HttpStringResult(result);
    }
}

// Form debug tool handler
class FormDebugHandler : Object, RouteHandler {
    public async HttpResult handle_route(HttpContext context, RouteContext route_context) throws Error {
        FormData? form_data = null;
        string? body_text = null;
        
        // Try to parse form data if this is a POST with form content
        if (context.request.is_post() && 
            (context.request.is_form_urlencoded() || context.request.is_multipart())) {
            try {
                form_data = yield FormDataParser.parse(
                    context.request.request_body,
                    context.request.content_type
                );
            } catch (Error e) {
                body_text = @"Error parsing form data: $(e.message)";
            }
        }
        
        // Get counts (uint type)
        uint field_count = form_data != null ? form_data.field_count() : 0;
        uint file_count = form_data != null ? form_data.file_count() : 0;
        
        var parts = new Series<string>();
        parts.add("""<!DOCTYPE html>
<html>
<head>
    <title>Form Debug Tool</title>
    <style>
        body { font-family: monospace; max-width: 800px; margin: 40px auto; padding: 20px; background: #f5f5f5; }
        .section { background: white; padding: 20px; margin: 20px 0; border-radius: 5px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
        h1 { color: #333; }
        h2 { color: #666; border-bottom: 2px solid #007bff; padding-bottom: 10px; }
        table { width: 100%; border-collapse: collapse; margin: 10px 0; }
        th, td { padding: 10px; text-align: left; border-bottom: 1px solid #ddd; }
        th { background: #007bff; color: white; }
        tr:hover { background: #f9f9f9; }
        .empty { color: #999; font-style: italic; }
        a { color: #007bff; text-decoration: none; }
        a:hover { text-decoration: underline; }
        form { margin: 20px 0; }
        input, textarea { width: 100%; padding: 8px; margin: 5px 0; box-sizing: border-box; }
        button { background: #007bff; color: white; padding: 10px 20px; border: none; border-radius: 5px; cursor: pointer; }
    </style>
</head>
<body>
    <h1>Form Debug Tool</h1>
    
    <div class="section">
        <h2>Test Form</h2>
        <form action="/form-debug" method="POST" enctype="multipart/form-data">
            <label>Text Field: <input type="text" name="test_field" value="test value"></label>
            <label>File: <input type="file" name="test_file"></label>
            <button type="submit">Submit Test</button>
        </form>
    </div>
    
    <div class="section">
        <h2>Request Information</h2>
        <table>
            <tr><th>Method</th><td>$(context.request.method)</td></tr>
            <tr><th>Path</th><td>$(context.request.raw_path)</td></tr>
            <tr><th>Content Type</th><td>$(context.request.content_type)</td></tr>
            <tr><th>Content Length</th><td>$(context.request.content_length)</td></tr>
            <tr><th>Is Form URL Encoded</th><td>$(context.request.is_form_urlencoded())</td></tr>
            <tr><th>Is Multipart</th><td>$(context.request.is_multipart())</td></tr>
        </table>
    </div>
""");
        
        if (form_data != null) {
            parts.add(@"    <div class=\"section\">\n");
            parts.add(@"        <h2>Form Fields ($field_count fields)</h2>\n");
            
            if (field_count == 0) {
                parts.add(@"        <p class=\"empty\">No form fields received.</p>\n");
            } else {
                parts.add(@"        <table>\n");
                parts.add(@"            <tr><th>Field Name</th><th>Value</th></tr>\n");
                
                form_data.fields.to_immutable_buffer()
                    .iterate((grouping) => {
                        grouping.iterate((value) => {
                            parts.add(@"            <tr><td>$(grouping.key)</td><td>$(value.escape(""))</td></tr>\n");
                        });
                    });
                
                parts.add(@"        </table>\n");
            }
            
            parts.add(@"    </div>\n");
            
            parts.add(@"    <div class=\"section\">\n");
            parts.add(@"        <h2>File Uploads ($file_count files)</h2>\n");
            
            if (file_count == 0) {
                parts.add(@"        <p class=\"empty\">No files uploaded.</p>\n");
            } else {
                parts.add(@"        <table>\n");
                parts.add(@"            <tr><th>Field Name</th><th>Filename</th><th>Content-Type</th><th>Size</th></tr>\n");
                
                form_data.files.to_immutable_buffer()
                    .iterate((grouping) => {
                        grouping.iterate((file) => {
                            parts.add(@"            <tr><td>$(file.field_name)</td><td>$(file.filename)</td><td>$(file.content_type)</td><td>$(file.data.length) bytes</td></tr>\n");
                        });
                    });
                
                parts.add(@"        </table>\n");
            }
            
            parts.add(@"    </div>\n");
        } else if (body_text != null) {
            parts.add(@"    <div class=\"section\">\n");
            parts.add(@"        <h2>Error</h2>\n");
            parts.add(@"        <pre>$(body_text.escape(""))</pre>\n");
            parts.add(@"    </div>\n");
        }
        
        parts.add("""    <div class="section">
        <h2>Query Parameters</h2>
""");
        
        var query_count = context.request.query_params.to_immutable_buffer().count();
        if (query_count == 0) {
            parts.add(@"        <p class=\"empty\">No query parameters.</p>\n");
        } else {
            parts.add(@"        <table>\n");
            parts.add(@"            <tr><th>Parameter</th><th>Value</th></tr>\n");
            
            context.request.query_params.to_immutable_buffer()
                .iterate((grouping) => {
                    grouping.iterate((value) => {
                        parts.add(@"            <tr><td>$(grouping.key)</td><td>$(value.escape(""))</td></tr>\n");
                    });
                });
            
            parts.add(@"        </table>\n");
        }
        
        parts.add("""    </div>
    
    <p><a href="/">Back to Forms</a></p>
</body>
</html>""");
        
        var result = parts.to_immutable_buffer()
            .aggregate<string>("", (acc, s) => acc + s);
        
        return new HttpStringResult(result)
            .set_header("Content-Type", "text/html");
    }
}

// Helper class for product data
class Product {
    public int id { get; private set; }
    public string name { get; private set; }
    public string category { get; private set; }
    public double price { get; private set; }
    
    public Product(int id, string name, string category, double price) {
        this.id = id;
        this.name = name;
        this.category = category;
        this.price = price;
    }
    
    public string to_json() {
        return @"{ \"id\": $id, \"name\": \"$name\", \"category\": \"$category\", \"price\": $price }";
    }
}

void main() {
    var router = new Router();
    var server = new Server(8084, router);
    
    // Register handlers
    router.get("/", new FormPageHandler());
    router.post("/submit-simple", new SimpleFormHandler());
    router.post("/submit-register", new RegisterFormHandler());
    router.post("/submit-search", new SearchFormHandler());
    router.post("/submit-file", new FileUploadHandler());
    router.map("/form-debug", new FormDebugHandler());  // Handles both GET and POST
    
    print("Form Data Example Server running on port 8084\n");
    print("Open http://localhost:8084/ in your browser to try the forms\n");
    
    server.run();
}