GNU libmicrohttpd: src/daemon/connection.c File Reference

#define DEBUG_CLOSE MHD_NO

Add extra debug messages with reasons for closing connections (non-error reasons).

Definition at line 94 of file connection.c.

#define DEBUG_SEND_DATA MHD_NO

Should all data send be printed to stderr?

Definition at line 99 of file connection.c.

#define HTTP_100_CONTINUE "HTTP/1.1 100 Continue\r\n\r\n"

Message to transmit when http 1.1 request is received

Definition at line 37 of file connection.c.

Referenced by MHD_connection_handle_idle(), MHD_connection_handle_write(), and need_100_continue().

#define INTERNAL_ERROR ""

Response text used when there is an internal server error.

Intentionally empty here to keep our memory footprint minimal.

Definition at line 87 of file connection.c.

Referenced by MHD_connection_get_fdset().

#define REQUEST_LACKS_HOST ""

Response text used when the request (http header) does not contain a "Host:" header and still claims to be HTTP 1.1.

Intentionally empty here to keep our memory footprint minimal.

Definition at line 62 of file connection.c.

Referenced by parse_connection_headers().

#define REQUEST_MALFORMED ""

Response text used when the request (http header) is malformed.

Intentionally empty here to keep our memory footprint minimal.

Definition at line 75 of file connection.c.

Referenced by MHD_connection_handle_idle(), and process_broken_line().

#define REQUEST_TOO_BIG ""

Response text used when the request (http header) is too big to be processed.

Intentionally empty here to keep our memory footprint minimal.

Definition at line 49 of file connection.c.

Referenced by connection_add_header(), get_next_header_line(), MHD_connection_get_fdset(), parse_cookie_header(), and process_broken_line().

static void add_extra_headers ( struct MHD_Connection * connection ) [static]

Check if we need to set some additional headers for http-compiliance.

Definition at line 437 of file connection.c.

References MHD_Connection::have_chunked_upload, MHD_add_response_header(), MHD_get_response_header(), MHD_HTTP_HEADER_CONNECTION, MHD_HTTP_HEADER_CONTENT_LENGTH, MHD_HTTP_HEADER_TRANSFER_ENCODING, MHD_HTTP_VERSION_1_1, MHD_NO, MHD_YES, MHD_Connection::response, SPRINTF, MHD_Response::total_size, and MHD_Connection::version.

Referenced by build_header_response().

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static int build_header_response ( struct MHD_Connection * connection ) [static]

Allocate the connection's write buffer and fill it with all of the headers (or footers, if we have already sent the body) from the HTTPd's response.

Definition at line 536 of file connection.c.

References add_extra_headers(), MHD_Connection::daemon, MHD_Response::first_header, get_date_string(), MHD_HTTP_Header::header, MHD_HTTP_Header::kind, MHD_CONNECTION_FOOTERS_RECEIVED, MHD_FOOTER_KIND, MHD_get_reason_phrase_for(), MHD_get_response_header(), MHD_HEADER_KIND, MHD_HTTP_HEADER_DATE, MHD_HTTP_VERSION_1_1, MHD_NO, MHD_pool_allocate(), MHD_YES, MHD_HTTP_Header::next, MHD_Connection::pool, MHD_Connection::response, SPRINTF, MHD_Connection::state, MHD_HTTP_Header::value, MHD_Connection::write_buffer, MHD_Connection::write_buffer_append_offset, MHD_Connection::write_buffer_send_offset, and MHD_Connection::write_buffer_size.

Referenced by MHD_connection_handle_idle(), and transmit_error_response().

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static void call_connection_handler ( struct MHD_Connection * connection ) [static]

Call the handler of the application for this connection. Handles chunking of the upload as well as normal uploads.

Definition at line 1066 of file connection.c.

References MHD_Connection::client_context, connection_close_error(), MHD_Connection::current_chunk_offset, MHD_Connection::current_chunk_size, MHD_Connection::daemon, MHD_Daemon::default_handler, MHD_Connection::have_chunked_upload, MHD_Connection::method, MHD_NO, MHD_YES, MHD_Connection::read_buffer, MHD_Connection::read_buffer_offset, MHD_Connection::remaining_upload_size, MHD_Connection::response, SSCANF, MHD_Connection::url, and MHD_Connection::version.

Referenced by MHD_connection_handle_idle().

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static int check_write_done	(	struct MHD_Connection *	connection,
		enum MHD_CONNECTION_STATE	next_state
	)			`[static]`

Check if we are done sending the write-buffer. If so, transition into "next_state".

Returns:: MHY_NO if we are not done, MHD_YES if we are

Definition at line 1314 of file connection.c.

References MHD_NO, MHD_pool_reallocate(), MHD_YES, MHD_Connection::pool, MHD_Connection::state, MHD_Connection::write_buffer, MHD_Connection::write_buffer_append_offset, MHD_Connection::write_buffer_send_offset, and MHD_Connection::write_buffer_size.

Referenced by MHD_connection_handle_write().

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static int connection_add_header	(	struct MHD_Connection *	connection,
		char *	key,
		char *	value,
		enum MHD_ValueKind	kind
	)			`[static]`

Returns:: MHD_NO on failure (out of memory), MHD_YES for success

Definition at line 887 of file connection.c.

References MHD_Connection::daemon, MHD_HTTP_Header::header, MHD_Connection::headers_received, MHD_HTTP_Header::kind, MHD_HTTP_REQUEST_ENTITY_TOO_LARGE, MHD_NO, MHD_pool_allocate(), MHD_YES, MHD_HTTP_Header::next, MHD_Connection::pool, REQUEST_TOO_BIG, transmit_error_response(), and MHD_HTTP_Header::value.

Referenced by parse_arguments(), parse_cookie_header(), and process_broken_line().

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static void connection_close_error ( struct MHD_Connection * connection ) [static]

A serious error occured, close the connection (and notify the application).

Definition at line 303 of file connection.c.

References MHD_connection_close(), and MHD_REQUEST_TERMINATED_WITH_ERROR.

Referenced by call_connection_handler(), do_read(), do_write(), MHD_connection_get_fdset(), MHD_connection_handle_idle(), MHD_connection_handle_read(), MHD_connection_handle_write(), try_ready_chunked_body(), and try_ready_normal_body().

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static void do_fd_set	(	int	fd,
		fd_set *	set,
		int *	max_fd
	)			`[static]`

Add "fd" to the "fd_set". If "fd" is greater than "*max", set "*max" to fd.

Definition at line 660 of file connection.c.

Referenced by MHD_connection_get_fdset().

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static int do_read ( struct MHD_Connection * connection ) [static]

Try reading data from the socket into the read buffer of the connection.

Returns:: MHD_YES if something changed, MHD_NO if we were interrupted or if no space was available

Definition at line 1235 of file connection.c.

References connection_close_error(), MHD_Connection::daemon, MHD_NO, MHD_YES, MHD_Connection::read_buffer, MHD_Connection::read_buffer_offset, MHD_Connection::read_buffer_size, MHD_Connection::read_closed, MHD_Connection::recv_cls, SHUTDOWN, MHD_Connection::socket_fd, and STRERROR.

Referenced by MHD_connection_handle_read().

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static int do_write ( struct MHD_Connection * connection ) [static]

Try writing data to the socket from the write buffer of the connection.

Returns:: MHD_YES if something changed, MHD_NO if we were interrupted

Definition at line 1277 of file connection.c.

References connection_close_error(), MHD_Connection::daemon, FPRINTF, MHD_NO, MHD_YES, MHD_Connection::send_cls, STRERROR, MHD_Connection::write_buffer, MHD_Connection::write_buffer_append_offset, and MHD_Connection::write_buffer_send_offset.

Referenced by MHD_connection_handle_write().

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static void get_date_string ( char * date ) [static]

Produce HTTP "Date:" header.

Parameters:

date

where to write the header, with at least 128 bytes available space.

Definition at line 484 of file connection.c.

References SPRINTF.

Referenced by build_header_response().

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static char* get_next_header_line ( struct MHD_Connection * connection ) [static]

Parse a single line of the HTTP header. Advance read_buffer (!) appropriately. If the current line does not fit, consider growing the buffer. If the line is far too long, close the connection. If no line is found (incomplete, buffer too small, line too long), return NULL. Otherwise return a pointer to the line.

Definition at line 834 of file connection.c.

References MHD_BUF_INC_SIZE, MHD_HTTP_REQUEST_ENTITY_TOO_LARGE, MHD_HTTP_REQUEST_URI_TOO_LONG, MHD_pool_reallocate(), MHD_Connection::pool, MHD_Connection::read_buffer, MHD_Connection::read_buffer_offset, MHD_Connection::read_buffer_size, REQUEST_TOO_BIG, and transmit_error_response().

Referenced by MHD_connection_handle_idle().

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void MHD_connection_close	(	struct MHD_Connection *	connection,
		enum MHD_RequestTerminationCode	termination_code
	)

Close the given connection and give the specified termination code to the user.

Definition at line 282 of file connection.c.

References MHD_Connection::client_context, CLOSE, MHD_Connection::daemon, MHD_CONNECTION_CLOSED, MHD_Daemon::notify_completed, SHUTDOWN, MHD_Connection::socket_fd, and MHD_Connection::state.

Referenced by connection_close_error(), MHD_handle_connection(), MHD_stop_daemon(), and MHD_tls_connection_close().

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int MHD_connection_get_fdset	(	struct MHD_Connection *	connection,
		fd_set *	read_fd_set,
		fd_set *	write_fd_set,
		fd_set *	except_fd_set,
		int *	max_fd
	)

Obtain the select sets for this connection

Returns:: MHD_YES on success

Definition at line 673 of file connection.c.

References connection_close_error(), MHD_Connection::daemon, do_fd_set(), EXTRA_CHECK, INTERNAL_ERROR, MHD_CONNECTION_BODY_RECEIVED, MHD_CONNECTION_BODY_SENT, MHD_CONNECTION_CHUNKED_BODY_READY, MHD_CONNECTION_CHUNKED_BODY_UNREADY, MHD_CONNECTION_CLOSED, MHD_CONNECTION_CONTINUE_SENDING, MHD_CONNECTION_CONTINUE_SENT, MHD_CONNECTION_FOOTER_PART_RECEIVED, MHD_CONNECTION_FOOTERS_RECEIVED, MHD_CONNECTION_FOOTERS_SENDING, MHD_CONNECTION_FOOTERS_SENT, MHD_CONNECTION_HEADER_PART_RECEIVED, MHD_CONNECTION_HEADERS_PROCESSED, MHD_CONNECTION_HEADERS_RECEIVED, MHD_CONNECTION_HEADERS_SENDING, MHD_CONNECTION_HEADERS_SENT, MHD_CONNECTION_INIT, MHD_CONNECTION_NORMAL_BODY_READY, MHD_CONNECTION_NORMAL_BODY_UNREADY, MHD_CONNECTION_URL_RECEIVED, MHD_HTTP_INTERNAL_SERVER_ERROR, MHD_HTTP_REQUEST_ENTITY_TOO_LARGE, MHD_HTTP_REQUEST_URI_TOO_LONG, MHD_NO, MHD_pool_create(), MHD_TLS_CONNECTION_INIT, MHD_USE_SELECT_INTERNALLY, MHD_USE_THREAD_PER_CONNECTION, MHD_YES, MHD_Connection::pool, MHD_Daemon::pool_size, MHD_Connection::read_buffer_offset, MHD_Connection::read_buffer_size, MHD_Connection::read_closed, REQUEST_TOO_BIG, MHD_Connection::socket_fd, MHD_Connection::state, transmit_error_response(), and try_grow_read_buffer().

Referenced by MHD_get_fdset(), and MHD_handle_connection().

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int MHD_connection_handle_idle ( struct MHD_Connection * connection )

This function was created to handle per-connection processing that has to happen even if the socket cannot be read or written to. All implementations (multithreaded, external select, internal select) call this function.

Returns:: MHD_YES if we should continue to process the connection (not dead yet), MHD_NO if it died

Definition at line 1741 of file connection.c.

References build_header_response(), call_connection_handler(), connection_close_error(), MHD_Daemon::connection_timeout, MHD_Connection::daemon, EXTRA_CHECK, get_next_header_line(), HTTP_100_CONTINUE, MHD_Connection::last_activity, MHD_CONNECTION_BODY_RECEIVED, MHD_CONNECTION_BODY_SENT, MHD_CONNECTION_CHUNKED_BODY_READY, MHD_CONNECTION_CHUNKED_BODY_UNREADY, MHD_CONNECTION_CLOSED, MHD_CONNECTION_CONTINUE_SENDING, MHD_CONNECTION_CONTINUE_SENT, MHD_CONNECTION_FOOTER_PART_RECEIVED, MHD_CONNECTION_FOOTERS_RECEIVED, MHD_CONNECTION_FOOTERS_SENDING, MHD_CONNECTION_FOOTERS_SENT, MHD_CONNECTION_HEADER_PART_RECEIVED, MHD_CONNECTION_HEADERS_PROCESSED, MHD_CONNECTION_HEADERS_RECEIVED, MHD_CONNECTION_HEADERS_SENDING, MHD_CONNECTION_HEADERS_SENT, MHD_CONNECTION_INIT, MHD_CONNECTION_NORMAL_BODY_READY, MHD_CONNECTION_NORMAL_BODY_UNREADY, MHD_CONNECTION_URL_RECEIVED, MHD_destroy_response(), MHD_FOOTER_KIND, MHD_HEADER_KIND, MHD_HTTP_BAD_REQUEST, MHD_HTTP_HEADER_CONNECTION, MHD_HTTP_VERSION_1_1, MHD_lookup_connection_value(), MHD_NO, MHD_pool_destroy(), MHD_pool_reset(), MHD_REQUEST_TERMINATED_COMPLETED_OK, MHD_YES, need_100_continue(), parse_connection_headers(), parse_initial_message_line(), process_broken_line(), process_header_line(), MHD_Connection::read_closed, REQUEST_MALFORMED, MHD_Connection::socket_fd, MHD_Connection::state, transmit_error_response(), try_ready_chunked_body(), and try_ready_normal_body().

Referenced by MHD_set_http_calbacks(), and MHD_tls_connection_handle_idle().

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int MHD_connection_handle_read ( struct MHD_Connection * connection )

This function handles a particular connection when it has been determined that there is data to be read off a socket. All implementations (multithreaded, external select, internal select) call this function to handle reads.

Returns:: MHD_YES if we should continue to process the connection (not dead yet), MHD_NO if it died

Definition at line 1511 of file connection.c.

References connection_close_error(), do_read(), MHD_Connection::last_activity, MHD_CONNECTION_BODY_RECEIVED, MHD_CONNECTION_CLOSED, MHD_CONNECTION_CONTINUE_SENDING, MHD_CONNECTION_CONTINUE_SENT, MHD_CONNECTION_FOOTER_PART_RECEIVED, MHD_CONNECTION_HEADER_PART_RECEIVED, MHD_CONNECTION_HEADERS_PROCESSED, MHD_CONNECTION_HEADERS_RECEIVED, MHD_CONNECTION_INIT, MHD_CONNECTION_URL_RECEIVED, MHD_NO, MHD_pool_reallocate(), MHD_YES, and MHD_Connection::state.

Referenced by MHD_set_http_calbacks(), and MHD_tls_connection_handle_read().

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int MHD_connection_handle_write ( struct MHD_Connection * connection )

This function was created to handle writes to sockets when it has been determined that the socket can be written to. All implementations (multithreaded, external select, internal select) call this function

Returns:: MHD_YES if we should continue to process the connection (not dead yet), MHD_NO if it died

Definition at line 1569 of file connection.c.

References check_write_done(), connection_close_error(), MHD_Connection::continue_message_write_offset, MHD_Response::crc, MHD_Connection::daemon, MHD_Response::data, MHD_Response::data_size, MHD_Response::data_start, do_write(), EXTRA_CHECK, FPRINTF, HTTP_100_CONTINUE, MHD_Connection::last_activity, MHD__gnutls_record_send(), MHD_CONNECTION_BODY_RECEIVED, MHD_CONNECTION_BODY_SENT, MHD_CONNECTION_CHUNKED_BODY_READY, MHD_CONNECTION_CHUNKED_BODY_UNREADY, MHD_CONNECTION_CLOSED, MHD_CONNECTION_CONTINUE_SENDING, MHD_CONNECTION_CONTINUE_SENT, MHD_CONNECTION_FOOTER_PART_RECEIVED, MHD_CONNECTION_FOOTERS_RECEIVED, MHD_CONNECTION_FOOTERS_SENDING, MHD_CONNECTION_FOOTERS_SENT, MHD_CONNECTION_HEADER_PART_RECEIVED, MHD_CONNECTION_HEADERS_PROCESSED, MHD_CONNECTION_HEADERS_RECEIVED, MHD_CONNECTION_HEADERS_SENDING, MHD_CONNECTION_HEADERS_SENT, MHD_CONNECTION_INIT, MHD_CONNECTION_NORMAL_BODY_READY, MHD_CONNECTION_NORMAL_BODY_UNREADY, MHD_CONNECTION_URL_RECEIVED, MHD_NO, MHD_TLS_CONNECTION_INIT, MHD_TLS_HANDSHAKE_COMPLETE, MHD_TLS_HANDSHAKE_FAILED, MHD_TLS_HELLO_REQUEST, MHD_USE_SSL, MHD_YES, MHD_Response::mutex, MHD_Connection::response, MHD_Connection::send_cls, MHD_Connection::state, STRERROR, and try_ready_normal_body().

Referenced by MHD_set_http_calbacks(), and MHD_tls_connection_handle_write().

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int MHD_get_connection_values	(	struct MHD_Connection *	connection,
		enum MHD_ValueKind	kind,
		MHD_KeyValueIterator	iterator,
		void *	iterator_cls
	)

Get all of the headers from the request.

Parameters:

	iterator	callback to call on each header; maybe NULL (then just count headers)
	iterator_cls	extra argument to iterator

Returns:: number of entries iterated over

Definition at line 110 of file connection.c.

References MHD_HTTP_Header::header, MHD_Connection::headers_received, MHD_HTTP_Header::kind, MHD_YES, MHD_HTTP_Header::next, and MHD_HTTP_Header::value.

const char* MHD_lookup_connection_value	(	struct MHD_Connection *	connection,
		enum MHD_ValueKind	kind,
		const char *	key
	)

Get a particular header value. If multiple values match the kind, return any one of them.

Parameters:

key

the header to look for

Returns:: NULL if no such item was found

Definition at line 192 of file connection.c.

References MHD_HTTP_Header::header, MHD_Connection::headers_received, MHD_HTTP_Header::kind, MHD_HTTP_Header::next, and MHD_HTTP_Header::value.

Referenced by MHD_connection_handle_idle(), MHD_create_post_processor(), need_100_continue(), parse_connection_headers(), and parse_cookie_header().

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int MHD_queue_response	(	struct MHD_Connection *	connection,
		unsigned int	status_code,
		struct MHD_Response *	response
	)

Queue a response to be transmitted to the client (as soon as possible).

Parameters:

	connection	the connection identifying the client
	status_code	HTTP status code (i.e. 200 for OK)
	response	response to transmit

Returns:: MHD_NO on error (i.e. reply already sent), MHD_YES on success or if message has been queued

Definition at line 220 of file connection.c.

References MHD_Connection::have_chunked_response, MHD_Connection::method, MHD_CONNECTION_FOOTERS_RECEIVED, MHD_CONNECTION_HEADERS_PROCESSED, MHD_HTTP_METHOD_HEAD, MHD_HTTP_VERSION_1_1, MHD_increment_response_rc(), MHD_NO, MHD_YES, MHD_Connection::read_closed, MHD_Connection::response, MHD_Connection::response_write_position, MHD_Connection::responseCode, SHUTDOWN, MHD_Connection::socket_fd, MHD_Connection::state, MHD_Response::total_size, and MHD_Connection::version.

Referenced by parse_connection_headers(), and transmit_error_response().

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int MHD_set_connection_value	(	struct MHD_Connection *	connection,
		enum MHD_ValueKind	kind,
		const char *	key,
		const char *	value
	)

This function can be used to add an entry to the HTTP headers of a connection (so that the MHD_get_connection_values function will return them -- and the MHD PostProcessor will also see them). This maybe required in certain situations (see Mantis #1399) where (broken) HTTP implementations fail to supply values needed by the post processor (or other parts of the application).

This function MUST only be called from within the MHD_AccessHandlerCallback (otherwise, access maybe improperly synchronized). Furthermore, the client must guarantee that the key and value arguments are 0-terminated strings that are NOT freed until the connection is closed. (The easiest way to do this is by passing only arguments to permanently allocated strings.).

Parameters:

	connection	the connection for which a value should be set
	kind	kind of the value
	key	key for the value
	value	the value itself

Returns:: MHD_NO if the operation could not be performed due to insufficient memory; MHD_YES on success

Definition at line 166 of file connection.c.

References MHD_HTTP_Header::header, MHD_Connection::headers_received, MHD_HTTP_Header::kind, MHD_NO, MHD_pool_allocate(), MHD_YES, MHD_HTTP_Header::next, MHD_Connection::pool, and MHD_HTTP_Header::value.

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void MHD_set_http_calbacks ( struct MHD_Connection * connection )

Definition at line 2084 of file connection.c.

References MHD_Connection::idle_handler, MHD_connection_handle_idle(), MHD_connection_handle_read(), MHD_connection_handle_write(), MHD_Connection::read_handler, and MHD_Connection::write_handler.

Referenced by MHD_accept_connection().

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static int need_100_continue ( struct MHD_Connection * connection ) [static]

Do we (still) need to send a 100 continue message for this connection?

Definition at line 261 of file connection.c.

References MHD_Connection::continue_message_write_offset, HTTP_100_CONTINUE, MHD_HEADER_KIND, MHD_HTTP_HEADER_EXPECT, MHD_HTTP_VERSION_1_1, MHD_lookup_connection_value(), MHD_Connection::response, and MHD_Connection::version.

Referenced by MHD_connection_handle_idle().

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static int parse_arguments ( enu

connection.c File Reference

Defines

Functions

Detailed Description

Define Documentation

Function Documentation


Defines
#define	HTTP_100_CONTINUE "HTTP/1.1 100 Continue\r\n\r\n"
#define	REQUEST_TOO_BIG ""
#define	REQUEST_LACKS_HOST ""
#define	REQUEST_MALFORMED ""
#define	INTERNAL_ERROR ""
#define	DEBUG_CLOSE MHD_NO
#define	DEBUG_SEND_DATA MHD_NO
Functions
int	MHD_get_connection_values (struct MHD_Connection connection, enum MHD_ValueKind kind, MHD_KeyValueIterator iterator, void iterator_cls)
int	MHD_set_connection_value (struct MHD_Connection connection, enum MHD_ValueKind kind, const char key, const char *value)
const char *	MHD_lookup_connection_value (struct MHD_Connection connection, enum MHD_ValueKind kind, const char key)
int	MHD_queue_response (struct MHD_Connection connection, unsigned int status_code, struct MHD_Response response)
static int	need_100_continue (struct MHD_Connection *connection)
void	MHD_connection_close (struct MHD_Connection *connection, enum MHD_RequestTerminationCode termination_code)
static void	connection_close_error (struct MHD_Connection *connection)
static int	try_ready_normal_body (struct MHD_Connection *connection)
static int	try_ready_chunked_body (struct MHD_Connection *connection)
static void	add_extra_headers (struct MHD_Connection *connection)
static void	get_date_string (char *date)
static int	try_grow_read_buffer (struct MHD_Connection *connection)
static int	build_header_response (struct MHD_Connection *connection)
static void	transmit_error_response (struct MHD_Connection connection, unsigned int status_code, const char message)
static void	do_fd_set (int fd, fd_set set, int max_fd)
int	MHD_connection_get_fdset (struct MHD_Connection connection, fd_set read_fd_set, fd_set write_fd_set, fd_set except_fd_set, int *max_fd)
static char *	get_next_header_line (struct MHD_Connection *connection)
static int	connection_add_header (struct MHD_Connection connection, char key, char *value, enum MHD_ValueKind kind)
static int	parse_arguments (enum MHD_ValueKind kind, struct MHD_Connection connection, char args)
static int	parse_cookie_header (struct MHD_Connection *connection)
static int	parse_initial_message_line (struct MHD_Connection connection, char line)
static void	call_connection_handler (struct MHD_Connection *connection)
static int	do_read (struct MHD_Connection *connection)
static int	do_write (struct MHD_Connection *connection)
static int	check_write_done (struct MHD_Connection *connection, enum MHD_CONNECTION_STATE next_state)
static int	process_header_line (struct MHD_Connection connection, char line)
static int	process_broken_line (struct MHD_Connection connection, char line, enum MHD_ValueKind kind)
static void	parse_connection_headers (struct MHD_Connection *connection)
int	MHD_connection_handle_read (struct MHD_Connection *connection)
int	MHD_connection_handle_write (struct MHD_Connection *connection)
int	MHD_connection_handle_idle (struct MHD_Connection *connection)
void	MHD_set_http_calbacks (struct MHD_Connection *connection)