Server.cpp File Reference

The HTTP server: the page's files, a small JSON API, and one thread per connection. More...

#include "Server.hpp"
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <unistd.h>
#include <algorithm>
#include <cerrno>
#include <cctype>
#include <format>
#include <fstream>
#include <iostream>
#include <mutex>
#include <sstream>
#include <system_error>
#include <thread>
#include <utility>
#include "Catalog.hpp"
#include "Output.hpp"
#include "Session.hpp"
#include "Util.hpp"

Go to the source code of this file.

Classes
class	tinysql::anonymous_namespace{Server.cpp}::Socket
	Owns a socket descriptor and closes it when it goes out of scope (RAII). More...
struct	tinysql::anonymous_namespace{Server.cpp}::Request
	One HTTP request, split into the parts the server uses. More...

Functions
void	tinysql::anonymous_namespace{Server.cpp}::throwSystemError (std::string_view what)
	Throws the error of the last failed system call.
std::string_view	tinysql::anonymous_namespace{Server.cpp}::headerValue (std::string_view head, std::string_view name)
	Finds a header's value in the raw request, ignoring the case of its name.
Request	tinysql::anonymous_namespace{Server.cpp}::readRequest (int fd)
	Reads one HTTP request: the request line, the headers and, if there is one, the body.
void	tinysql::anonymous_namespace{Server.cpp}::sendAll (int fd, std::string_view data)
	Sends all of data, retrying until it is written or the client goes away.
std::string	tinysql::anonymous_namespace{Server.cpp}::httpResponse (std::string_view status, std::string_view contentType, std::string_view body)
	Builds a complete HTTP response.
std::string	tinysql::anonymous_namespace{Server.cpp}::errorResponse (std::string_view status, std::string_view message)
	Builds a JSON error answer, e.g. {"error":"Not found"}.
std::string_view	tinysql::anonymous_namespace{Server.cpp}::contentTypeFor (std::string_view name)
	The content type of a file of the page, from its extension.
bool	tinysql::anonymous_namespace{Server.cpp}::isSafeFileName (std::string_view name)
	Tells whether a requested file name is safe to serve from the web/ directory.
std::string	tinysql::anonymous_namespace{Server.cpp}::serveFile (const ServerConfig &config, std::string_view name)
	Serves one file of the page from the web/ directory.
std::string	tinysql::anonymous_namespace{Server.cpp}::runSql (const ServerConfig &config, std::string_view sql)
	Runs the SQL of a POST /api/sql request, logs it, and builds the JSON answer.
std::string	tinysql::anonymous_namespace{Server.cpp}::listTables (const ServerConfig &config)
	Builds the JSON answer of GET /api/tables. Call it only while holding workMutex.
std::string	tinysql::anonymous_namespace{Server.cpp}::clientAddress (const sockaddr_in &address)
	Formats a client's IPv4 address.
void	tinysql::anonymous_namespace{Server.cpp}::handleClient (const ServerConfig &config, int fd, const std::string &client)
	Serves one connection: reads the request, answers it, and closes.
void	tinysql::runServer (const ServerConfig &config)
	Serves connections until the process is stopped.

Variables
constexpr std::size_t	tinysql::anonymous_namespace{Server.cpp}::kMaxRequestSize = 64 * 1024
	The largest request read (headers and body), in bytes; the rest is ignored.
constexpr int	tinysql::anonymous_namespace{Server.cpp}::kIdleSeconds = 30
	How long a connection may stay silent before it is closed, in seconds.
std::mutex	tinysql::anonymous_namespace{Server.cpp}::workMutex
	Lets only one request at a time run SQL and write to the console.

Detailed Description

The HTTP server: the page's files, a small JSON API, and one thread per connection.

Definition in file Server.cpp.

Function Documentation

runServer()

void tinysql::runServer

(

const ServerConfig &

config

)

Serves connections until the process is stopped.

It serves the page's files from ServerConfig::webDir and a small JSON API: GET /api/tables lists the tables, POST /api/sql runs the SQL in the request body. Each connection is served in its own thread; the SQL itself runs one request at a time.

Parameters

config

The server settings.

Exceptions

std::system_error

If the port cannot be opened (for example, it is already in use).

Definition at line 312 of file Server.cpp.