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87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
#ifndef HTTP_SERVER_H
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#define HTTP_SERVER_H
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#include <string.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define DEFAULT_HTTP_PORT 8844
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/**
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* Starts the HTTP server on the specified port.
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* Returns 0 on success, negative on error.
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*/
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int http_server_start(int port);
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/**
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* Stops the HTTP server.
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*/
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void http_server_stop(void);
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/**
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* Returns 1 if the HTTP server is currently running, 0 otherwise.
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*/
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int http_server_is_running(void);
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/** Returns 1 after a client requested a graceful process shutdown. */
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int http_server_exit_requested(void);
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/**
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* Restarts the HTTP server on the specified port with a delay (microseconds)
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* between stopping and starting to allow socket cleanup and network stabilization.
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* Returns 0 on success, negative on error.
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*/
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int http_server_restart_with_delay(int port, unsigned int delay_us);
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/**
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* Restarts the HTTP server on the specified port using a default 500ms delay.
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* Stops the server, waits briefly for socket cleanup, and restarts it.
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* Returns 0 on success, negative on error.
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*/
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int http_server_restart(int port);
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/**
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* Action determined by the network watchdog.
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*/
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typedef enum {
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WATCHDOG_ACTION_NONE = 0,
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WATCHDOG_ACTION_RESTORE_NETWORK,
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WATCHDOG_ACTION_RESTORE_LOOPBACK
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} watchdog_action_t;
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/**
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* Evaluates whether the network watchdog needs to restore or refresh the HTTP service.
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* Handles IP changes, recovery from disconnected state, and self-healing if the server
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* died or failed to start on previous attempts.
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*/
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static inline watchdog_action_t http_server_watchdog_evaluate(int server_is_running,
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int has_ip,
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const char *current_ip,
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const char *new_ip) {
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if (!current_ip) current_ip = "unknown";
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if (!new_ip) new_ip = "unknown";
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if (has_ip) {
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if (!server_is_running ||
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strcmp(new_ip, current_ip) != 0 ||
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strcmp(current_ip, "unknown") == 0) {
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return WATCHDOG_ACTION_RESTORE_NETWORK;
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}
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} else {
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if (!server_is_running ||
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strcmp(current_ip, "unknown") != 0) {
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return WATCHDOG_ACTION_RESTORE_LOOPBACK;
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}
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}
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return WATCHDOG_ACTION_NONE;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* HTTP_SERVER_H */
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