### Configure Qt HTTP Server Examples with CMake

Source: https://github.com/qt/qthttpserver/blob/dev/examples/httpserver/CMakeLists.txt

This snippet demonstrates how to conditionally add example projects to the build process. It checks for the existence of required Qt modules before registering the example targets.

```cmake
if(TARGET Qt::Gui AND TARGET Qt::Concurrent)
    qt_internal_add_example(colorpalette)
endif()
qt_internal_add_example(simple)
```

--------------------------------

### Basic QHttpServer Setup and Routing

Source: https://context7.com/qt/qthttpserver/llms.txt

Demonstrates how to set up a basic HTTP server using QHttpServer, define simple routes, routes with path parameters, and return JSON responses.

```APIDOC
## Basic QHttpServer Setup and Routing

### Description
This example shows how to initialize `QHttpServer`, define routes for different URL patterns, including those with path parameters, and configure the server to listen on a specific port.

### Method
N/A (This is a setup example)

### Endpoint
N/A (This is a setup example)

### Parameters
N/A

### Request Example
N/A

### Response
N/A

## GET /

### Description
Handles requests to the root path and returns a simple text response.

### Method
GET

### Endpoint
/

### Parameters
N/A

### Request Example
N/A

### Response
#### Success Response (200)
- **response** (string) - "Hello world"

## GET /user/<arg>

### Description
Handles requests to a user path with a typed path parameter for user ID.

### Method
GET

### Endpoint
/user/<arg>

### Parameters
#### Path Parameters
- **id** (qint32) - Required - The ID of the user.

### Request Example
N/A

### Response
#### Success Response (200)
- **response** (string) - "User [id]"

## GET /user/<arg>/detail/<arg>

### Description
Handles requests with multiple typed path parameters for user ID and year.

### Method
GET

### Endpoint
/user/<arg>/detail/<arg>

### Parameters
#### Path Parameters
- **id** (qint32) - Required - The ID of the user.
- **year** (qint32) - Required - The year for the detail.

### Request Example
N/A

### Response
#### Success Response (200)
- **response** (string) - "User [id] detail year - [year]"

## GET /json/

### Description
Handles requests to the /json/ path and returns a JSON object.

### Method
GET

### Endpoint
/json/

### Parameters
N/A

### Request Example
N/A

### Response
#### Success Response (200)
- **response** (QJsonObject) - A JSON object with key-value pairs.
  - **key1** (string)
  - **key2** (string)
  - **key3** (string)

```

--------------------------------

### GET /stream

Source: https://context7.com/qt/qthttpserver/llms.txt

Demonstrates how to use QHttpServerResponder to send a direct response with custom headers.

```APIDOC
## GET /stream

### Description
Sends a direct text response with custom headers using the responder object.

### Method
GET

### Endpoint
/stream

### Parameters
None

### Request Example
GET /stream

### Response
#### Success Response (200)
- **body** (string) - Direct response data

#### Response Example
Direct response data
```

--------------------------------

### Implementing Async Handlers with QFuture and QtConcurrent

Source: https://context7.com/qt/qthttpserver/llms.txt

Examples of handling asynchronous requests in QtHttpServer. Includes basic async operations, paginated responses with query parameter parsing, and chunked streaming responses using QHttpServerResponder.

```cpp
#include <QHttpServer>
#include <QHttpServerResponse>
#include <QtConcurrent>

QHttpServer httpServer;

// Async handler returning QFuture<QHttpServerResponse>
httpServer.route("/api/slow-operation", [](const QHttpServerRequest &request) {
    return QtConcurrent::run([request]() {
        QThread::sleep(2);
        return QHttpServerResponse(QJsonObject{
            {"status", "completed"},
            {"query", request.query().toString()}
        });
    });
});

// Async with pagination and delay support
httpServer.route("/api/items", QHttpServerRequest::Method::Get,
    [](const QHttpServerRequest &request) {
        return QtConcurrent::run([request]() {
            qint64 page = 1;
            qint64 perPage = 10;
            qint64 delay = 0;

            QUrlQuery query = request.query();
            if (query.hasQueryItem("page"))
                page = query.queryItemValue("page").toLongLong();
            if (query.hasQueryItem("per_page"))
                perPage = query.queryItemValue("per_page").toLongLong();
            if (query.hasQueryItem("delay"))
                delay = query.queryItemValue("delay").toLongLong();

            if (page < 1 || perPage < 1) {
                return QHttpServerResponse(QHttpServerResponder::StatusCode::BadRequest);
            }

            if (delay > 0) {
                QThread::sleep(delay);
            }

            QJsonArray items;
            qint64 start = (page - 1) * perPage;
            for (qint64 i = 0; i < perPage; ++i) {
                items.append(QJsonObject{
                    {"id", start + i + 1},
                    {"name", QString("Item %1").arg(start + i + 1)}
                });
            }

            return QHttpServerResponse(QJsonObject{
                {"page", page},
                {"per_page", perPage},
                {"data", items}
            });
        });
    });

// Async handler with responder for streaming
httpServer.route("/api/stream", [](QHttpServerRequest request,
                                    QHttpServerResponder &&responder) {
    return QtConcurrent::run([request = std::move(request),
                              responder = std::move(responder)]() mutable {
        QHttpHeaders headers;
        headers.append(QHttpHeaders::WellKnownHeader::ContentType, "text/event-stream");
        responder.writeBeginChunked(headers);

        for (int i = 0; i < 5; ++i) {
            QThread::sleep(1);
            QString event = QString("data: Event %1\n\n").arg(i + 1);
            responder.writeChunk(event.toUtf8());
        }

        responder.writeEndChunked(QByteArray());
        return QFuture<void>();
    });
});
```

--------------------------------

### Configure Qt HttpServer Project with CMake

Source: https://github.com/qt/qthttpserver/blob/dev/examples/httpserver/simple/CMakeLists.txt

This CMakeLists.txt file sets up a Qt 6 project that uses the HttpServer module. It defines the project name, finds required Qt packages, creates an executable, links the HttpServer library, and installs the application and its resources.

```cmake
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

cmake_minimum_required(VERSION 3.16)
project(simple LANGUAGES CXX)

if(NOT DEFINED INSTALL_EXAMPLESDIR)
    set(INSTALL_EXAMPLESDIR "examples")
endif()

set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/httpserver/${PROJECT_NAME}")

find_package(Qt6 REQUIRED COMPONENTS HttpServer)

if(ANDROID)
    find_package(Qt6 REQUIRED COMPONENTS Gui)
endif()

qt_standard_project_setup()

qt_add_executable(simple
    main.cpp
)

target_link_libraries(simple PRIVATE
    Qt6::HttpServer
)

if(ANDROID)
    target_link_libraries(simple PRIVATE
        Qt::Gui
    )
endif()

qt_add_resources(simple "assets"
    PREFIX
        "/"
    FILES
        assets/certificate.crt
        assets/private.key
        assets/qt-logo.png
)

install(TARGETS simple
    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
)
```

--------------------------------

### Configure HTTPS/TLS with HTTP/2 in Qt HTTP Server

Source: https://context7.com/qt/qthttpserver/llms.txt

This C++ code illustrates how to set up a Qt HTTP server to support secure HTTPS connections using QSslServer. It includes loading SSL certificates and private keys, configuring TLS, and enabling HTTP/2 support via ALPN. The example also shows how to bind both HTTP and HTTPS servers to different ports.

```cpp
#include <QHttpServer>
#include <QSslServer>
#include <QSslConfiguration>
#include <QSslCertificate>
#include <QSslKey>
#include <QTcpServer>
#include <QFile>
#include <QCoreApplication>
#include <QHostAddress>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    QHttpServer httpServer;

    httpServer.route("/", []() {
        return "Secure Hello World!";
    });

    // Setup HTTP server on port 8080
    auto tcpServer = std::make_unique<QTcpServer>();
    if (!tcpServer->listen(QHostAddress::Any, 8080) || !httpServer.bind(tcpServer.get())) {
        qWarning() << "Failed to start HTTP server";
        return -1;
    }
    quint16 httpPort = tcpServer->serverPort();
    tcpServer.release();

    // Setup HTTPS server with TLS
    QSslConfiguration sslConfig = QSslConfiguration::defaultConfiguration();

    // Load certificate
    const auto certChain = QSslCertificate::fromPath(":/certs/server.crt");
    if (certChain.isEmpty()) {
        qWarning() << "Failed to load SSL certificate";
        return -1;
    }
    sslConfig.setLocalCertificate(certChain.front());

    // Load private key
    QFile keyFile(":/certs/server.key");
    if (!keyFile.open(QIODevice::ReadOnly)) {
        qWarning() << "Failed to open private key file";
        return -1;
    }
    QSslKey privateKey(&keyFile, QSsl::Rsa);
    keyFile.close();
    sslConfig.setPrivateKey(privateKey);

    // Enable HTTP/2 via ALPN
    sslConfig.setAllowedNextProtocols({QSslConfiguration::ALPNProtocolHTTP2});

    auto sslServer = std::make_unique<QSslServer>();
    sslServer->setSslConfiguration(sslConfig);

    if (!sslServer->listen(QHostAddress::Any, 8443) || !httpServer.bind(sslServer.get())) {
        qWarning() << "Failed to start HTTPS server";
        return -1;
    }
    quint16 httpsPort = sslServer->serverPort();
    sslServer.release();

    qInfo() << "HTTP server running on port" << httpPort;
    qInfo() << "HTTPS server running on port" << httpsPort;

    return app.exec();
}

```

--------------------------------

### Handling Specific HTTP Methods

Source: https://context7.com/qt/qthttpserver/llms.txt

Illustrates how to define routes that respond to specific HTTP methods (GET, POST, PUT, DELETE, PATCH) and handle request bodies.

```APIDOC
## API Endpoints for Items

### Description
This section details how to create API endpoints for managing items, supporting various HTTP methods for listing, retrieving, creating, updating, and deleting items.

## GET /api/items

### Description
Retrieves a list of all items.

### Method
GET

### Endpoint
/api/items

### Parameters
N/A

### Request Example
N/A

### Response
#### Success Response (200)
- **response** (QJsonArray) - An array of item objects.
  - **id** (number)
  - **name** (string)

### Response Example
```json
[
  {"id": 1, "name": "Item 1"},
  {"id": 2, "name": "Item 2"}
]
```

## GET /api/items/<arg>

### Description
Retrieves a specific item by its ID.

### Method
GET

### Endpoint
/api/items/<arg>

### Parameters
#### Path Parameters
- **itemId** (qint64) - Required - The ID of the item to retrieve.

### Request Example
N/A

### Response
#### Success Response (200)
- **response** (QJsonObject) - The item object.
  - **id** (number)
  - **name** (string)

### Response Example
```json
{"id": 1, "name": "Item 1"}
```

## POST /api/items

### Description
Creates a new item.

### Method
POST

### Endpoint
/api/items

### Parameters
#### Request Body
- **request** (QJsonDocument) - Required - JSON document containing the item details.

### Request Example
```json
{
  "name": "New Item"
}
```

### Response
#### Success Response (201 Created)
- **response** (QJsonObject) - The newly created item object with an assigned ID.
  - **id** (number)
  - **name** (string)

#### Error Response (400 Bad Request)
Returned if the request body is not a valid JSON.

### Response Example
```json
{"id": 123, "name": "New Item"}
```

## PUT /api/items/<arg>

### Description
Updates an existing item by its ID.

### Method
PUT

### Endpoint
/api/items/<arg>

### Parameters
#### Path Parameters
- **itemId** (qint64) - Required - The ID of the item to update.
#### Request Body
- **request** (QJsonDocument) - Required - JSON document with the updated item details.

### Request Example
```json
{
  "name": "Updated Item Name"
}
```

### Response
#### Success Response (200 OK)
- **response** (QJsonObject) - The updated item object.
  - **id** (number)
  - **name** (string)

#### Error Response (400 Bad Request)
Returned if the request body is not a valid JSON.

### Response Example
```json
{"id": 1, "name": "Updated Item Name"}
```

## DELETE /api/items/<arg>

### Description
Deletes an item by its ID.

### Method
DELETE

### Endpoint
/api/items/<arg>

### Parameters
#### Path Parameters
- **itemId** (qint64) - Required - The ID of the item to delete.

### Request Example
N/A

### Response
#### Success Response (200 OK)
- **response** (string) - Confirmation message or status.

#### Error Response (404 Not Found)
Returned if the item with the specified ID is not found.

### Response Example
```json
{"status": "deleted"}
```

## PATCH /api/items/<arg>

### Description
Partially updates an existing item by its ID.

### Method
PATCH

### Endpoint
/api/items/<arg>

### Parameters
#### Path Parameters
- **itemId** (qint64) - Required - The ID of the item to partially update.
#### Request Body
- **request** (QJsonDocument) - Required - JSON document with the fields to update.

### Request Example
```json
{
  "name": "Partially Updated Name"
}
```

### Response
#### Success Response (200 OK)
- **response** (QJsonObject) - The updated item object or a status confirmation.
  - **id** (number)
  - **status** (string)

### Response Example
```json
{"id": 1, "status": "updated"}
```
```

--------------------------------

### GET /chunked

Source: https://context7.com/qt/qthttpserver/llms.txt

Demonstrates streaming data using chunked transfer encoding via QHttpServerResponder.

```APIDOC
## GET /chunked

### Description
Initiates a chunked transfer encoding response to stream data to the client.

### Method
GET

### Endpoint
/chunked

### Parameters
None

### Request Example
GET /chunked

### Response
#### Success Response (200)
- **body** (stream) - Multiple chunks of text data

#### Response Example
First chunk of data\nSecond chunk of data\nThird chunk of data
```

--------------------------------

### Define RESTful Routes with HTTP Methods

Source: https://context7.com/qt/qthttpserver/llms.txt

Shows how to restrict routes to specific HTTP methods like GET, POST, PUT, DELETE, and PATCH using the QHttpServerRequest::Method enum and handling request bodies.

```cpp
#include <QHttpServer>
#include <QHttpServerResponse>

QHttpServer httpServer;

httpServer.route("/api/items", QHttpServerRequest::Method::Get,
    [](const QHttpServerRequest &request) {
        return QJsonArray{
            QJsonObject{{"id", 1}, {"name", "Item 1"}},
            QJsonObject{{"id", 2}, {"name", "Item 2"}}
        };
    });

httpServer.route("/api/items/<arg>", QHttpServerRequest::Method::Get,
    [](qint64 itemId) {
        return QJsonObject{{"id", itemId}, {"name", QString("Item %1").arg(itemId)}};
    });

httpServer.route("/api/items", QHttpServerRequest::Method::Post,
    [](const QHttpServerRequest &request) {
        QJsonDocument doc = QJsonDocument::fromJson(request.body());
        if (doc.isNull()) {
            return QHttpServerResponse(QHttpServerResponder::StatusCode::BadRequest);
        }
        QJsonObject item = doc.object();
        item["id"] = 123;
        return QHttpServerResponse(item, QHttpServerResponder::StatusCode::Created);
    });

httpServer.route("/api/items/<arg>", QHttpServerRequest::Method::Put,
    [](qint64 itemId, const QHttpServerRequest &request) {
        QJsonDocument doc = QJsonDocument::fromJson(request.body());
        if (doc.isNull()) {
            return QHttpServerResponse(QHttpServerResponder::StatusCode::BadRequest);
        }
        QJsonObject updated = doc.object();
        updated["id"] = itemId;
        return QHttpServerResponse(updated);
    });

httpServer.route("/api/items/<arg>", QHttpServerRequest::Method::Delete,
    [](qint64 itemId, const QHttpServerRequest &request) {
        return QHttpServerResponse(QHttpServerResponder::StatusCode::Ok);
    });

httpServer.route("/api/items/<arg>", QHttpServerRequest::Method::Patch,
    [](qint64 itemId, const QHttpServerRequest &request) {
        QJsonDocument doc = QJsonDocument::fromJson(request.body());
        return QHttpServerResponse(QJsonObject{{"id", itemId}, {"status", "updated"}});
    });
```

--------------------------------

### GET /custom/<arg>

Source: https://context7.com/qt/qthttpserver/llms.txt

Demonstrates the use of custom type converters in the router to parse URL segments into specific C++ types.

```APIDOC
## GET /custom/<arg>

### Description
Uses a registered custom converter to parse a numeric URL segment into a CustomArg object.

### Method
GET

### Endpoint
/custom/<arg>

### Parameters
#### Path Parameters
- **arg** (integer) - Required - A numeric value matching the regex [+-]?\d+

### Request Example
GET /custom/42

### Response
#### Success Response (200)
- **body** (string) - Confirmation message with parsed data

#### Response Example
Received custom arg with data: 42
```

--------------------------------

### Create a Basic HTTP Server with Qt

Source: https://context7.com/qt/qthttpserver/llms.txt

Demonstrates how to initialize a QHttpServer, define routes with parameters, return JSON responses, and bind the server to a QTcpServer instance.

```cpp
#include <QHttpServer>
#include <QHttpServerResponse>
#include <QCoreApplication>
#include <QTcpServer>
#include <QJsonObject>

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    QHttpServer httpServer;

    httpServer.route("/", []() {
        return "Hello world";
    });

    httpServer.route("/user/<arg>", [](qint32 id) {
        return QString("User %1").arg(id);
    });

    httpServer.route("/user/<arg>/detail/<arg>", [](qint32 id, qint32 year) {
        return QString("User %1 detail year - %2").arg(id).arg(year);
    });

    httpServer.route("/json/", []() {
        return QJsonObject{
            {"key1", "value1"},
            {"key2", "value2"},
            {"key3", "value3"}
        };
    });

    auto tcpserver = std::make_unique<QTcpServer>();
    if (!tcpserver->listen(QHostAddress::Any, 8080) || !httpServer.bind(tcpserver.get())) {
        qWarning() << "Server failed to listen on port 8080";
        return -1;
    }
    tcpserver.release();

    qInfo() << "Server running on http://127.0.0.1:8080/";
    return app.exec();
}
```

--------------------------------

### QHttpServerRequest - Accessing Request Details

Source: https://context7.com/qt/qthttpserver/llms.txt

Demonstrates how to access various components of an incoming HTTP request, including URL, method, headers, body, query parameters, and client information.

```APIDOC
## GET /request-info

### Description
Retrieves and returns detailed information about the incoming HTTP request.

### Method
GET

### Endpoint
/request-info

### Query Parameters
- **name** (string) - Optional - Example query parameter.
- **value** (string) - Optional - Another example query parameter.

### Request Body
Not applicable for this GET request.

### Request Example
GET /request-info?name=test&value=123

### Response
#### Success Response (200)
- **url** (string) - The URL of the request.
- **method** (string) - The HTTP method used (e.g., GET, POST).
- **body** (string) - The request body content.
- **contentType** (string) - The value of the Content-Type header.
- **headers** (object) - An object containing all request headers.
- **query** (object) - An object containing all query parameters.
- **remoteAddress** (string) - The IP address of the client.
- **remotePort** (integer) - The port of the client.
- **localAddress** (string) - The IP address of the server.
- **localPort** (integer) - The port of the server.

#### Response Example
```json
{
  "url": "http://localhost:8080/request-info?name=test&value=123",
  "method": "GET",
  "body": "",
  "contentType": "",
  "headers": {
    "Host": "localhost:8080",
    "Connection": "keep-alive"
  },
  "query": {
    "name": "test",
    "value": "123"
  },
  "remoteAddress": "::1",
  "remotePort": 51234,
  "localAddress": "::1",
  "localPort": 8080
}
```
```

--------------------------------

### QHttpServerResponse - Creating Various Responses

Source: https://context7.com/qt/qthttpserver/llms.txt

Illustrates how to construct different types of HTTP responses, including plain text, JSON objects, JSON arrays, responses with custom status codes, MIME types, and static files.

```APIDOC
## Various Response Endpoints

### Description
Provides examples of creating different HTTP responses using QHttpServerResponse.

### Method
GET

### Endpoint
- /text
- /json-object
- /json-array
- /not-found
- /xml
- /assets/<arg>
- /custom-headers
- /error

### Response
#### Success Response (200) - Varies by endpoint
- **Plain Text**: Returns "Hello, World!".
- **JSON Object**: Returns a JSON object with 'message' and 'code'.
- **JSON Array**: Returns a JSON array of objects.
- **XML**: Returns XML data with 'application/xml' content type.
- **Static File**: Serves a file from the application's resource system.
- **Custom Headers**: Returns text with custom headers like 'Cache-Control' and 'X-Custom-Header'.

#### Error Response (400)
- **Error**: Returns "Bad Request: Invalid parameters" with a 400 status code.

#### Not Found Response (404)
- **Not Found**: Returns a 404 Not Found status code.

### Response Example (JSON Object)
```json
{
  "message": "Success",
  "code": 200
}
```

### Response Example (XML)
```xml
<?xml version="1.0"?><root><item>data</item></root>
```

### Response Example (Custom Headers)
```
Custom response
```

Headers:
- `Cache-Control`: `no-cache`
- `X-Custom-Header`: `CustomValue`
```

--------------------------------

### Configure QHttpServer Security and Limits

Source: https://context7.com/qt/qthttpserver/llms.txt

This snippet demonstrates how to configure QHttpServer settings such as rate limiting, connection limits, keep-alive timeouts, request size limits, and IP whitelisting/blacklisting for enhanced security and performance. It shows how to apply these configurations and read them back.

```cpp
#include <QHttpServer>
#include <QHttpServerConfiguration>
#include <QHostAddress>

QHttpServer httpServer;

QHttpServerConfiguration config;

// Rate limiting - maximum requests per second per client
config.setRateLimitPerSecond(100);

// Connection limits
config.setMaximumConnectionsPerHost(10);

// Keep-alive timeout
config.setKeepAliveTimeout(std::chrono::seconds(30));

// Request size limits
config.setMaximumUrlSize(8192);              // Max URL length
config.setMaximumBodySize(10 * 1024 * 1024); // Max body size (10MB)
config.setMaximumTotalHeaderSize(32768);     // Max total headers size
config.setMaximumHeaderFieldSize(8192);      // Max single header size
config.setMaximumHeaderFieldCount(100);      // Max number of headers

// IP whitelist - only allow specific subnets
QList<std::pair<QHostAddress, int>> whitelist = {
    {QHostAddress("192.168.1.0"), 24},   // 192.168.1.0/24
    {QHostAddress("10.0.0.0"), 8},       // 10.0.0.0/8
    {QHostAddress::LocalHost, 32}        // 127.0.0.1/32
};
config.setWhitelist(whitelist);

// IP blacklist - block specific addresses
QList<std::pair<QHostAddress, int>> blacklist = {
    {QHostAddress("192.168.1.100"), 32}  // Block single IP
};
config.setBlacklist(blacklist);

// Apply configuration to server
httpServer.setConfiguration(config);

// Read current configuration
QHttpServerConfiguration currentConfig = httpServer.configuration();
qDebug() << "Rate limit:" << currentConfig.rateLimitPerSecond();
qDebug() << "Max connections:" << currentConfig.maximumConnectionsPerHost();
qDebug() << "Keep-alive timeout:" << currentConfig.keepAliveTimeout().count() << "seconds";

```

--------------------------------

### QHttpServerRequest: Accessing Incoming HTTP Request Details

Source: https://context7.com/qt/qthttpserver/llms.txt

Demonstrates how to extract information from an incoming HTTP request using QHttpServerRequest. This includes accessing the URL, HTTP method, request body, specific headers, all headers, query parameters, and client connection details. It's useful for routing and processing client requests.

```cpp
#include <QHttpServer>
#include <QHttpServerRequest>

QHttpServer httpServer;

httpServer.route("/request-info", [](const QHttpServerRequest &request) {
    QJsonObject info;

    // Get request URL and method
    info["url"] = request.url().toString();
    info["method"] = QVariant::fromValue(request.method()).toString();

    // Get request body (for POST/PUT requests)
    info["body"] = QString::fromUtf8(request.body());

    // Get specific header value
    QByteArray contentType = request.value("Content-Type");
    info["contentType"] = QString::fromUtf8(contentType);

    // Get all headers
    const QHttpHeaders &headers = request.headers();
    QJsonObject headerObj;
    for (qsizetype i = 0; i < headers.size(); ++i) {
        headerObj[QString::fromUtf8(headers.nameAt(i))] = 
            QString::fromUtf8(headers.valueAt(i));
    }
    info["headers"] = headerObj;

    // Get query parameters
    QUrlQuery query = request.query();
    QJsonObject queryObj;
    for (const auto &pair : query.queryItems()) {
        queryObj[pair.first] = pair.second;
    }
    info["query"] = queryObj;

    // Get client information
    info["remoteAddress"] = request.remoteAddress().toString();
    info["remotePort"] = request.remotePort();
    info["localAddress"] = request.localAddress().toString();
    info["localPort"] = request.localPort();

    return QHttpServerResponse(info);
});

// Example request: GET /request-info?name=test&value=123
// Returns JSON with all request details
```

--------------------------------

### Control HTTP Responses with QHttpServerResponder

Source: https://context7.com/qt/qthttpserver/llms.txt

Demonstrates how to use QHttpServerResponder for direct response handling, including sending JSON documents, performing chunked transfers, and including trailer headers in chunked responses.

```cpp
#include <QHttpServer>
#include <QHttpServerResponder>
#include <QJsonDocument>

QHttpServer httpServer;

httpServer.route("/stream", [](const QHttpServerRequest &request, QHttpServerResponder &&responder) {
    QHttpHeaders headers;
    headers.append(QHttpHeaders::WellKnownHeader::ContentType, "text/plain");
    responder.write(QByteArray("Direct response data"), headers, QHttpServerResponder::StatusCode::Ok);
});

httpServer.route("/json-doc", [](QHttpServerResponder &&responder) {
    QJsonObject data{{"status", "ok"}, {"timestamp", QDateTime::currentSecsSinceEpoch()}};
    QJsonDocument doc(data);
    responder.write(doc, QHttpServerResponder::StatusCode::Ok);
});

httpServer.route("/chunked", [](QHttpServerResponder &&responder) {
    QHttpHeaders headers;
    headers.append(QHttpHeaders::WellKnownHeader::ContentType, "text/plain");
    responder.writeBeginChunked(headers, QHttpServerResponder::StatusCode::Ok);
    responder.writeChunk("First chunk of data\n");
    responder.writeChunk("Second chunk of data\n");
    responder.writeChunk("Third chunk of data\n");
    responder.writeEndChunked(QByteArray());
});

httpServer.route("/chunked-trailers", [](QHttpServerResponder &&responder) {
    QHttpHeaders headers;
    headers.append(QHttpHeaders::WellKnownHeader::ContentType, "application/octet-stream");
    QList<QHttpHeaders::WellKnownHeader> trailerNames = { QHttpHeaders::WellKnownHeader::ContentMD5 };
    responder.writeBeginChunked(headers, trailerNames, QHttpServerResponder::StatusCode::Ok);
    responder.writeChunk("data chunk 1");
    responder.writeChunk("data chunk 2");
    QHttpHeaders trailers;
    trailers.append(QHttpHeaders::WellKnownHeader::ContentMD5, "abc123hash");
    responder.writeEndChunked(QByteArray(), trailers);
});
```

--------------------------------

### Configure Qt HTTP Server Logging at Runtime

Source: https://context7.com/qt/qthttpserver/llms.txt

This C++ code snippet demonstrates how to set up a Qt HTTP Server that allows runtime configuration of logging filters. It enables all Qt HTTP Server logging by default and provides an HTTP endpoint '/loggingFilter' to dynamically update logging rules based on query parameters. Another endpoint '/loggingStatus' is available to check the current logging status.

```cpp
#include <QHttpServer>
#include <QLoggingCategory>
#include <QCoreApplication>
#include <QTcpServer>
#include <QTextStream>
#include <QJsonObject>

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    QHttpServer server;

    auto tcpserver = std::make_unique<QTcpServer>();
    if (!tcpserver->listen(QHostAddress::LocalHost, 8000) || !server.bind(tcpserver.get()))
        return -1;
    tcpserver.release();

    // Enable all Qt HTTP Server logging at startup
    QLoggingCategory::setFilterRules("qt.httpserver=true");

    // Route to dynamically change logging configuration
    server.route("/loggingFilter", [](const QHttpServerRequest &request) {
        QString filter;
        QTextStream result(&filter);

        // Build filter rules from query parameters
        // Example: ?qt.httpserver=true&qt.httpserver.debug=false
        for (const auto &pair : request.query().queryItems()) {
            if (!filter.isEmpty())
                result << "\n";
            result << pair.first << "=" << pair.second;
        }

        // Apply new filter rules
        QLoggingCategory::setFilterRules(filter);

        return QJsonObject{
            {"message", "Logging filter updated"},
            {"filter", filter}
        };
    });

    // Route to check current logging status
    server.route("/loggingStatus", []() {
        return QJsonObject{
            {"qt.httpserver", QLoggingCategory("qt.httpserver").isDebugEnabled()},
            {"info", "Use /loggingFilter?category=true|false to configure"}
        };
    });

    qInfo() << "Server running on http://127.0.0.1:8000/";
    qInfo() << "Configure logging at: http://127.0.0.1:8000/loggingFilter?qt.httpserver=true";

    return app.exec();
}

// Enable logging via URL:
// http://127.0.0.1:8000/loggingFilter?qt.httpserver=true&qt.httpserver.request=true

```

--------------------------------

### QHttpServerResponse: Constructing HTTP Responses

Source: https://context7.com/qt/qthttpserver/llms.txt

Illustrates various ways to create HTTP responses using QHttpServerResponse. This includes generating responses with plain text, JSON objects, JSON arrays, custom status codes, custom MIME types, serving static files, and adding custom headers. This is essential for building web APIs and services with Qt.

```cpp
#include <QHttpServer>
#include <QHttpServerResponse>
#include <QJsonObject>
#include <QJsonArray>

QHttpServer httpServer;

// Plain text response (default status 200 OK)
httpServer.route("/text", []() {
    return QHttpServerResponse("Hello, World!");
});

// JSON object response
httpServer.route("/json-object", []() {
    return QHttpServerResponse(QJsonObject{
        {"message", "Success"},
        {"code", 200}
    });
});

// JSON array response
httpServer.route("/json-array", []() {
    return QHttpServerResponse(QJsonArray{
        QJsonObject{{"id", 1}},
        QJsonObject{{"id", 2}}
    });
});

// Response with custom status code
httpServer.route("/not-found", []() {
    return QHttpServerResponse(QHttpServerResponder::StatusCode::NotFound);
});

// Response with custom MIME type
httpServer.route("/xml", []() {
    QByteArray xmlData = "<?xml version=\"1.0\"?><root><item>data</item></root>";
    return QHttpServerResponse("application/xml", xmlData);
});

// Serve static file
httpServer.route("/assets/<arg>", [](const QUrl &url) {
    return QHttpServerResponse::fromFile(":/assets/" + url.path());
});

// Response with custom headers
httpServer.route("/custom-headers", []() {
    QHttpServerResponse response("Custom response");
    QHttpHeaders headers = response.headers();
    headers.append(QHttpHeaders::WellKnownHeader::CacheControl, "no-cache");
    headers.append("X-Custom-Header", "CustomValue");
    response.setHeaders(std::move(headers));
    return response;
});

// Error response with message
httpServer.route("/error", []() {
    return QHttpServerResponse("text/plain", "Bad Request: Invalid parameters",
                               QHttpServerResponder::StatusCode::BadRequest);
})
```

--------------------------------

### Configure Qt HTTP Server Project with CMake

Source: https://github.com/qt/qthttpserver/blob/dev/doc/snippets/custom-converter/CMakeLists.txt

This CMake configuration initializes a C++ project, finds the Qt6 HttpServer component, and links it to the project executable. It ensures the necessary dependencies are resolved for building a custom HTTP server application.

```cmake
cmake_minimum_required(VERSION 3.16)
project(custom-converter LANGUAGES CXX)

find_package(Qt6 REQUIRED COMPONENTS HttpServer)

qt_standard_project_setup()

qt_add_executable(custom-converter
    main.cpp
)

target_link_libraries(custom-converter PRIVATE
    Qt6::HttpServer
)
```

--------------------------------

### QHttpServer Configuration API

Source: https://context7.com/qt/qthttpserver/llms.txt

Configure server limits, rate limiting, connection management, and IP filtering for security and performance.

```APIDOC
## QHttpServerConfiguration

### Description
Configure server limits, rate limiting, connection management, and IP filtering for security and performance.

### Method
N/A (Configuration setup)

### Endpoint
N/A (Applies to the entire server)

### Parameters
N/A (Configuration is done via QHttpServerConfiguration object)

### Request Example
```cpp
#include <QHttpServer>
#include <QHttpServerConfiguration>
#include <QHostAddress>

QHttpServer httpServer;
QHttpServerConfiguration config;

// Rate limiting - maximum requests per second per client
config.setRateLimitPerSecond(100);

// Connection limits
config.setMaximumConnectionsPerHost(10);

// Keep-alive timeout
config.setKeepAliveTimeout(std::chrono::seconds(30));

// Request size limits
config.setMaximumUrlSize(8192);
config.setMaximumBodySize(10 * 1024 * 1024);
config.setMaximumTotalHeaderSize(32768);
config.setMaximumHeaderFieldSize(8192);
config.setMaximumHeaderFieldCount(100);

// IP whitelist
QList<std::pair<QHostAddress, int>> whitelist = {
    {QHostAddress("192.168.1.0"), 24},
    {QHostAddress("10.0.0.0"), 8},
    {QHostAddress::LocalHost, 32}
};
config.setWhitelist(whitelist);

// IP blacklist
QList<std::pair<QHostAddress, int>> blacklist = {
    {QHostAddress("192.168.1.100"), 32}
};
config.setBlacklist(blacklist);

// Apply configuration to server
httpServer.setConfiguration(config);
```

### Response
N/A (Configuration is applied directly to the server)

### Response Example
N/A
```

--------------------------------

### Handle WebSocket Upgrades with Custom Verification in QHttpServer (C++)

Source: https://context7.com/qt/qthttpserver/llms.txt

This C++ code demonstrates how to add a WebSocket upgrade verifier to QHttpServer. It allows for custom logic to accept or deny upgrade requests based on the path and authentication headers. It also shows how to handle incoming WebSocket connections and messages.

```cpp
#include <QHttpServer>
#include <QHttpServerWebSocketUpgradeResponse>
#include <QWebSocket>

QHttpServer httpServer;

// Add WebSocket upgrade verifier
httpServer.addWebSocketUpgradeVerifier(&httpServer,
    [](const QHttpServerRequest &request) {
        // Check the requested WebSocket path
        QString path = request.url().path();

        if (path == "/ws/chat") {
            // Accept upgrade for chat endpoint
            return QHttpServerWebSocketUpgradeResponse::accept();
        }

        if (path == "/ws/admin") {
            // Verify authentication for admin WebSocket
            auto authHeader = request.value("authorization");
            if (authHeader.isEmpty()) {
                return QHttpServerWebSocketUpgradeResponse::deny(
                    401, "Authentication required");
            }
            return QHttpServerWebSocketUpgradeResponse::accept();
        }

        // Pass to next handler or deny
        return QHttpServerWebSocketUpgradeResponse::passToNext();
    });

// Connect to newWebSocketConnection signal to handle new connections
QObject::connect(&httpServer, &QHttpServer::newWebSocketConnection, [&httpServer]() {
    while (httpServer.hasPendingWebSocketConnections()) {
        std::unique_ptr<QWebSocket> socket = httpServer.nextPendingWebSocketConnection();

        // Handle WebSocket messages
        QObject::connect(socket.get(), &QWebSocket::textMessageReceived,
            [](const QString &message) {
                qDebug() << "Received:" << message;
            });

        QObject::connect(socket.get(), &QWebSocket::disconnected,
            [socket = socket.get()]() {
                qDebug() << "WebSocket disconnected";
                socket->deleteLater();
            });

        // Send welcome message
        socket->sendTextMessage("Connected to WebSocket server");

        // Transfer ownership
        socket.release();
    }
});

```

--------------------------------

### CMake Configuration for Qt HttpServer

Source: https://github.com/qt/qthttpserver/blob/dev/tests/auto/cmake/CMakeLists.txt

This CMake script configures the build for the Qt HttpServer module. It sets up the project, finds necessary Qt packages, and prepares for testing. It ensures that the Qt HttpServer module and its dependencies are correctly integrated into the build process.

```cmake
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause

# This is an automatic test for the CMake configuration files.
# To run it manually,
# 1) mkdir build   # Create a build directory
# 2) cd build
# 3) # Run cmake on this directory
#    `$qt_prefix/bin/qt-cmake ..` or `cmake -DCMAKE_PREFIX_PATH=/path/to/qt ..`
# 4) ctest         # Run ctest

cmake_minimum_required(VERSION 3.16)
project(httpserver_cmake_tests)
enable_testing()

set(required_packages Core HttpServer)

# Setup the test when called as a completely standalone project.
if(TARGET Qt6::Core)
    # Tests are built as part of the repository's build tree.
    # Setup paths so that the Qt packages are found.
    qt_internal_set_up_build_dir_package_paths()
endif()

find_package(Qt6 REQUIRED COMPONENTS ${required_packages})

# Setup common test variables which were previously set by ctest_testcase_common.prf.
set(CMAKE_MODULES_UNDER_TEST "${required_packages}")

foreach(qt_package ${CMAKE_MODULES_UNDER_TEST})
    set(package_name "${QT_CMAKE_EXPORT_NAMESPACE}${qt_package}")
    if(${package_name}_FOUND)
        set(CMAKE_${qt_package}_MODULE_MAJOR_VERSION "${${package_name}_VERSION_MAJOR}")
        set(CMAKE_${qt_package}_MODULE_MINOR_VERSION "${${package_name}_VERSION_MINOR}")
        set(CMAKE_${qt_package}_MODULE_PATCH_VERSION "${${package_name}_VERSION_PATCH}")
    endif()
endforeach()

include("${_Qt6CTestMacros}")

set(module_includes
    HttpServer QHttpServer
)

_qt_internal_test_module_includes(
     ${module_includes}
)

```

--------------------------------

### Implement HTTP Basic Authentication in QHttpServer

Source: https://context7.com/qt/qthttpserver/llms.txt

This snippet shows how to implement HTTP Basic Authentication (RFC 7617) in QHttpServer. It includes a public route and a protected route that validates username and password credentials sent via the Authorization header. It also demonstrates how to return a 401 Unauthorized response with the correct WWW-Authenticate header.

```cpp
#include <QHttpServer>
#include <QHttpServerRequest>
#include <QHttpServerResponse>

QHttpServer httpServer;

// Public route - no authentication required
httpServer.route("/", []() {
    return "Welcome! Visit /protected for authenticated content.";
});

// Protected route with Basic Authentication
httpServer.route("/protected", [](const QHttpServerRequest &request) {
    auto auth = request.value("authorization").simplified();

    if (auth.size() > 6 && auth.first(6).toLower() == "basic ") {
        auto token = auth.sliced(6);
        auto userPass = QByteArray::fromBase64(token);

        if (auto colon = userPass.indexOf(':'); colon > 0) {
            auto userId = userPass.first(colon);
            auto password = userPass.sliced(colon + 1);

            // Validate credentials (use secure storage in production!)
            if (userId == "admin" && password == "secret123") {
                return QHttpServerResponse(QJsonObject{
                    {"message", "Welcome, authenticated user!"},
                    {"user", QString::fromUtf8(userId)}
                });
            }
        }
    }

    // Return 401 Unauthorized with WWW-Authenticate header
    QHttpServerResponse response("text/plain", "Authentication required",
                                 QHttpServerResponse::StatusCode::Unauthorized);
    auto headers = response.headers();
    headers.append(QHttpHeaders::WellKnownHeader::WWWAuthenticate,
                   R"(Basic realm="Protected Area", charset="UTF-8")");
    response.setHeaders(std::move(headers));
    return response;
});

// Token-based authentication example
httpServer.route("/api/data", [](const QHttpServerRequest &request) {
    auto authHeader = request.value("authorization");

    if (authHeader.startsWith("Bearer ")) {
        QString token = QString::fromUtf8(authHeader.mid(7));

        // Validate token (implement your token validation logic)
        if (token == "valid-api-token-12345") {
            return QHttpServerResponse(QJsonObject{{"data", "Secret API data"}});
        }
    }

    return QHttpServerResponse(QHttpServerResponder::StatusCode::Unauthorized);
});

```

--------------------------------

### Add Qt HTTP Server Responder Test

Source: https://github.com/qt/qthttpserver/blob/dev/tests/auto/qhttpserverresponder/CMakeLists.txt

This snippet demonstrates how to add a test target for the qhttpserverresponder using Qt's internal build system. It specifies the source file, required Qt library, and test data directory.

```cmake
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause

# Generated from qhttpserverresponder.pro.

#####################################################################
## tst_qhttpserverresponder Test:
#####################################################################

# Collect test data
list(APPEND test_data "data/")

qt_internal_add_test(tst_qhttpserverresponder
    SOURCES
        tst_qhttpserverresponder.cpp
    LIBRARIES
        Qt::HttpServer
    TESTDATA ${test_data}
)
```