Implementation:SeleniumHQ Selenium Civetweb API

Knowledge Sources	SeleniumHQ_Selenium CivetWeb
Domains	C_Plus_Plus, Vendored_Library
Last Updated	2026-02-12 00:00 GMT

Overview

Vendored C header defining the public API for the CivetWeb embedded HTTP server (version 1.11).

Description

Public C API header for the CivetWeb embedded web server. Defines feature flags (MG_FEATURES_FILES, MG_FEATURES_TLS, MG_FEATURES_CGI, MG_FEATURES_IPV6, MG_FEATURES_WEBSOCKET), server lifecycle functions (mg_init_library, mg_start, mg_stop), request/response handling (mg_write, mg_get_request_info), handler registration (mg_set_request_handler, mg_set_websocket_handler_with_subprotocols, mg_set_auth_handler), and configuration utilities. Supports Windows DLL export/import via CIVETWEB_API macro. Licensed under MIT.

Usage

Included by Selenium's IE WebDriver native C/C++ components and by the C++ wrapper (CivetServer.h).

Code Reference

Source Location

• Repository: SeleniumHQ_Selenium
• File: third_party/cpp/civetweb/civetweb.h

Key API Functions

#define CIVETWEB_VERSION "1.11"

CIVETWEB_API unsigned mg_init_library(unsigned features);
CIVETWEB_API unsigned mg_exit_library(void);
CIVETWEB_API struct mg_context *mg_start(const struct mg_callbacks *callbacks, void *user_data, const char **configuration_options);
CIVETWEB_API void mg_stop(struct mg_context *);
CIVETWEB_API void mg_set_request_handler(struct mg_context *ctx, const char *uri, mg_request_handler handler, void *cbdata);
CIVETWEB_API int mg_write(struct mg_connection *, const void *buf, size_t len);
CIVETWEB_API const struct mg_request_info *mg_get_request_info(const struct mg_connection *);

Related Pages

• Environment:SeleniumHQ_Selenium_Contributor_Development_Environment