#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/opt.h"
#include "libavutil/time.h"
#include "libavutil/parseutils.h"
#include "avformat.h"
#include "http.h"
#include "httpauth.h"
#include "internal.h"
#include "network.h"
#include "os_support.h"
#include "url.h"

Data Structures
struct	HTTPContext

Macros
#define	BUFFER_SIZE (MAX_URL_SIZE + HTTP_HEADERS_SIZE)

#define	MAX_REDIRECTS 8

#define	HTTP_SINGLE 1

#define	HTTP_MUTLI 2

#define	MAX_EXPIRY 19

#define	WHITESPACES " \n\t\r"

#define	OFFSET(x) offsetof(HTTPContext, x)

#define	D AV_OPT_FLAG_DECODING_PARAM

#define	E AV_OPT_FLAG_ENCODING_PARAM

#define	DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)

#define	NEEDS_ESCAPE(ch)

#define	HTTP_CLASS(flavor)

Enumerations
enum	HandshakeState { LOWER_PROTO, READ_HEADERS, WRITE_REPLY_HEADERS, FINISH }

Functions
static int	http_connect (URLContext h, const char path, const char local_path, const char hoststr, const char auth, const char proxyauth, int *new_location)

static int	http_read_header (URLContext h, int new_location)

static int	http_shutdown (URLContext *h, int flags)

void	ff_http_init_auth_state (URLContext dest, const URLContext src)
	Initialize the authentication state based on another HTTP URLContext. More...

static int	http_open_cnx_internal (URLContext h, AVDictionary *options)

static int	http_should_reconnect (HTTPContext *s, int err)

static int	http_open_cnx (URLContext h, AVDictionary *options)

int	ff_http_get_shutdown_status (URLContext *h)
	Get the HTTP shutdown response status, be used after http_shutdown. More...

int	ff_http_do_new_request (URLContext h, const char uri)
	Send a new HTTP request, reusing the old connection. More...

int	ff_http_do_new_request2 (URLContext h, const char uri, AVDictionary **opts)
	Send a new HTTP request, reusing the old connection. More...

int	ff_http_averror (int status_code, int default_averror)

static int	http_write_reply (URLContext *h, int status_code)

static void	handle_http_errors (URLContext *h, int error)

static int	http_handshake (URLContext *c)

static int	http_listen (URLContext h, const char uri, int flags, AVDictionary **options)

static int	http_open (URLContext h, const char uri, int flags, AVDictionary **options)

static int	http_accept (URLContext s, URLContext *c)

static int	http_getc (HTTPContext *s)

static int	http_get_line (HTTPContext s, char line, int line_size)

static int	check_http_code (URLContext h, int http_code, const char end)

static int	parse_location (HTTPContext s, const char p)

static void	parse_content_range (URLContext h, const char p)

static int	parse_content_encoding (URLContext h, const char p)

static int	parse_icy (HTTPContext s, const char tag, const char *p)

static int	parse_set_cookie_expiry_time (const char exp_str, struct tm buf)

static int	parse_set_cookie (const char set_cookie, AVDictionary *dict)

static int	parse_cookie (HTTPContext s, const char p, AVDictionary **cookies)

static int	cookie_string (AVDictionary dict, char *cookies)

static int	process_line (URLContext h, char line, int line_count, int *new_location)

static int	get_cookies (HTTPContext s, char cookies, const char path, const char *domain)
	Create a string containing cookie values for use as a HTTP cookie header field value for a particular path and domain from the cookie values stored in the HTTP protocol context. More...

static int	has_header (const char str, const char header)

static void	bprint_escaped_path (AVBPrint bp, const char path)
	Escape unsafe characters in path in order to pass them safely to the HTTP request. More...

static int	http_buf_read (URLContext h, uint8_t buf, int size)

static int64_t	http_seek_internal (URLContext *h, int64_t off, int whence, int force_reconnect)

static int	http_read_stream (URLContext h, uint8_t buf, int size)

static int	http_read_stream_all (URLContext h, uint8_t buf, int size)

static void	update_metadata (URLContext h, char data)

static int	store_icy (URLContext *h, int size)

static int	http_read (URLContext h, uint8_t buf, int size)

static int	http_write (URLContext h, const uint8_t buf, int size)

static int	http_close (URLContext *h)

static int64_t	http_seek (URLContext *h, int64_t off, int whence)

static int	http_get_file_handle (URLContext *h)

static int	http_get_short_seek (URLContext *h)

Variables
static const AVOption	options []

Macro Definition Documentation

◆ BUFFER_SIZE

#define BUFFER_SIZE (MAX_URL_SIZE + HTTP_HEADERS_SIZE)

Definition at line 49 of file http.c.

◆ MAX_REDIRECTS

#define MAX_REDIRECTS 8

Definition at line 50 of file http.c.

◆ HTTP_SINGLE

#define HTTP_SINGLE 1

Definition at line 51 of file http.c.

◆ HTTP_MUTLI

#define HTTP_MUTLI 2

Definition at line 52 of file http.c.

◆ MAX_EXPIRY

#define MAX_EXPIRY 19

Definition at line 53 of file http.c.

◆ WHITESPACES

#define WHITESPACES " \n\t\r"

Definition at line 54 of file http.c.

◆ OFFSET

#define OFFSET ( x ) offsetof(HTTPContext, x)

Definition at line 131 of file http.c.

◆ D

#define D AV_OPT_FLAG_DECODING_PARAM

Definition at line 132 of file http.c.

◆ E

#define E AV_OPT_FLAG_ENCODING_PARAM

Definition at line 133 of file http.c.

◆ DEFAULT_USER_AGENT

#define DEFAULT_USER_AGENT "Lavf/" AV_STRINGIFY(LIBAVFORMAT_VERSION)

Definition at line 134 of file http.c.

◆ NEEDS_ESCAPE

#define NEEDS_ESCAPE ( ch )

Value:

    ((ch) <= ' ' || (ch) >= '\x7f' || \
     (ch) == '"' || (ch) == '%' || (ch) == '<' || (ch) == '>' || (ch) == '\\' || \
     (ch) == '^' || (ch) == '`' || (ch) == '{' || (ch) == '}' || (ch) == '|')

◆ HTTP_CLASS

#define HTTP_CLASS ( flavor )

Value:

static const AVClass flavor ## _context_class = {   \
    .class_name = # flavor,                         \
    .item_name  = av_default_item_name,             \
    .option     = options,                          \
    .version    = LIBAVUTIL_VERSION_INT,            \
}

Definition at line 1847 of file http.c.

Enumeration Type Documentation

◆ HandshakeState

enum HandshakeState

Enumerator
LOWER_PROTO
READ_HEADERS
WRITE_REPLY_HEADERS
FINISH

Definition at line 55 of file http.c.

Function Documentation

◆ http_connect()

static int http_connect	(	URLContext *	h,
		const char *	path,
		const char *	local_path,
		const char *	hoststr,
		const char *	auth,
		const char *	proxyauth,
		int *	new_location
	)

static

Definition at line 1277 of file http.c.

Referenced by http_open_cnx_internal().

◆ http_read_header()

static int http_read_header	(	URLContext *	h,
		int *	new_location
	)

static

Definition at line 1214 of file http.c.

Referenced by http_connect(), http_handshake(), and http_read_stream().

◆ http_shutdown()

static int http_shutdown	(	URLContext *	h,
		int	flags
	)

static

Definition at line 1723 of file http.c.

Referenced by ff_http_do_new_request2(), and http_close().

◆ ff_http_init_auth_state()

void ff_http_init_auth_state	(	URLContext *	dest,
		const URLContext *	src
	)

Initialize the authentication state based on another HTTP URLContext.

This can be used to pre-initialize the authentication parameters if they are known beforehand, to avoid having to do an initial failing request just to get the parameters.

Parameters

dest	URL context whose authentication state gets updated
src	URL context whose authentication state gets copied

Definition at line 182 of file http.c.

◆ http_open_cnx_internal()

static int http_open_cnx_internal	(	URLContext *	h,
		AVDictionary **	options
	)

static

Definition at line 192 of file http.c.

Referenced by http_open_cnx().

◆ http_should_reconnect()

static int http_should_reconnect	(	HTTPContext *	s,
		int	err
	)

static

Definition at line 268 of file http.c.

Referenced by http_open_cnx().

◆ http_open_cnx()

static int http_open_cnx	(	URLContext *	h,
		AVDictionary **	options
	)

static

Definition at line 302 of file http.c.

Referenced by ff_http_do_new_request2(), http_open(), and http_seek_internal().

◆ ff_http_get_shutdown_status()

int ff_http_get_shutdown_status ( URLContext * h )

Get the HTTP shutdown response status, be used after http_shutdown.

Parameters

h	pointer to the resource

Returns: a negative value if an error condition occurred, 0 otherwise

Definition at line 376 of file http.c.

Referenced by hlsenc_io_close().

◆ ff_http_do_new_request()

int ff_http_do_new_request	(	URLContext *	h,
		const char *	uri
	)

Send a new HTTP request, reusing the old connection.

Parameters

h	pointer to the resource
uri	uri used to perform the request

Returns: a negative value if an error condition occurred, 0 otherwise

Definition at line 392 of file http.c.

Referenced by dashenc_io_open(), hlsenc_io_open(), and rtmp_http_send_cmd().

◆ ff_http_do_new_request2()

int ff_http_do_new_request2	(	URLContext *	h,
		const char *	uri,
		AVDictionary **	options
	)

Send a new HTTP request, reusing the old connection.

Parameters

h	pointer to the resource
uri	uri used to perform the request
options	A dictionary filled with HTTP options. On return this parameter will be destroyed and replaced with a dict containing options that were not found. May be NULL.

Returns: a negative value if an error condition occurred, 0 otherwise

Definition at line 396 of file http.c.

Referenced by ff_http_do_new_request(), and open_url_keepalive().

◆ ff_http_averror()

int ff_http_averror	(	int	status_code,
		int	default_averror
	)

Definition at line 450 of file http.c.

Referenced by check_http_code(), ff_rtsp_averror(), http_open_cnx(), and process_line().

◆ http_write_reply()

static int http_write_reply	(	URLContext *	h,
		int	status_code
	)

static

Definition at line 467 of file http.c.

Referenced by handle_http_errors(), and http_handshake().

◆ handle_http_errors()

static void handle_http_errors	(	URLContext *	h,
		int	error
	)

static

Definition at line 541 of file http.c.

Referenced by http_handshake().

◆ http_handshake()

static int http_handshake ( URLContext * c )

static

Definition at line 547 of file http.c.

Referenced by http_listen().

◆ http_listen()

static int http_listen	(	URLContext *	h,
		const char *	uri,
		int	flags,
		AVDictionary **	options
	)

static

Definition at line 583 of file http.c.

Referenced by http_open().

◆ http_open()

static int http_open	(	URLContext *	h,
		const char *	uri,
		int	flags,
		AVDictionary **	options
	)

static

Definition at line 614 of file http.c.

◆ http_accept()

static int http_accept	(	URLContext *	s,
		URLContext **	c
	)

static

Definition at line 656 of file http.c.

◆ http_getc()

static int http_getc ( HTTPContext * s )

static

Definition at line 680 of file http.c.

Referenced by http_get_line().

◆ http_get_line()

static int http_get_line	(	HTTPContext *	s,
		char *	line,
		int	line_size
	)

static

Definition at line 697 of file http.c.

Referenced by http_buf_read(), and http_read_header().

◆ check_http_code()

static int check_http_code	(	URLContext *	h,
		int	http_code,
		const char *	end
	)

static

Definition at line 721 of file http.c.

Referenced by process_line().

◆ parse_location()

static int parse_location	(	HTTPContext *	s,
		const char *	p
	)

static

Definition at line 736 of file http.c.

Referenced by process_line().

◆ parse_content_range()

static void parse_content_range	(	URLContext *	h,
		const char *	p
	)

static

Definition at line 750 of file http.c.

Referenced by process_line().

◆ parse_content_encoding()

static int parse_content_encoding	(	URLContext *	h,
		const char *	p
	)

static

Definition at line 765 of file http.c.

Referenced by process_line().

◆ parse_icy()

static int parse_icy	(	HTTPContext *	s,
		const char *	tag,
		const char *	p
	)

static

Definition at line 799 of file http.c.

Referenced by process_line().

◆ parse_set_cookie_expiry_time()

static int parse_set_cookie_expiry_time	(	const char *	exp_str,
		struct tm *	buf
	)

static

Definition at line 821 of file http.c.

Referenced by get_cookies(), and parse_cookie().

◆ parse_set_cookie()

static int parse_set_cookie	(	const char *	set_cookie,
		AVDictionary **	dict
	)

static

Definition at line 846 of file http.c.

Referenced by get_cookies(), and parse_cookie().

◆ parse_cookie()

static int parse_cookie	(	HTTPContext *	s,
		const char *	p,
		AVDictionary **	cookies
	)

static

Definition at line 883 of file http.c.

Referenced by get_cookies(), and process_line().

◆ cookie_string()

static int cookie_string	(	AVDictionary *	dict,
		char **	cookies
	)

static

Definition at line 945 of file http.c.

Referenced by http_read_header().

◆ process_line()

static int process_line	(	URLContext *	h,
		char *	line,
		int	line_count,
		int *	new_location
	)

static

Definition at line 968 of file http.c.

Referenced by http_read_header().

◆ get_cookies()

static int get_cookies	(	HTTPContext *	s,
		char **	cookies,
		const char *	path,
		const char *	domain
	)

static

Create a string containing cookie values for use as a HTTP cookie header field value for a particular path and domain from the cookie values stored in the HTTP protocol context.

The cookie string is stored in *cookies, and may be NULL if there are no valid cookies.

Returns: a negative value if an error condition occurred, 0 otherwise

Definition at line 1122 of file http.c.

Referenced by http_connect().

◆ has_header()

static int has_header	(	const char *	str,
		const char *	header
	)

inlinestatic

Definition at line 1206 of file http.c.

Referenced by http_connect().

◆ bprint_escaped_path()

static void bprint_escaped_path	(	AVBPrint *	bp,
		const char *	path
	)

static

Escape unsafe characters in path in order to pass them safely to the HTTP request.

Insipred by the algorithm in GNU wget:

escape "%" characters not followed by two hex digits
escape all "unsafe" characters except which are also "reserved"
pass through everything else

Definition at line 1253 of file http.c.

Referenced by http_connect().

◆ http_buf_read()

static int http_buf_read	(	URLContext *	h,
		uint8_t *	buf,
		int	size
	)

static

Definition at line 1437 of file http.c.

Referenced by http_read_stream().

◆ http_seek_internal()

static int64_t http_seek_internal	(	URLContext *	h,
		int64_t	off,
		int	whence,
		int	force_reconnect
	)

static

Definition at line 1772 of file http.c.

Referenced by http_read_stream(), and http_seek().

◆ http_read_stream()

static int http_read_stream	(	URLContext *	h,
		uint8_t *	buf,
		int	size
	)

static

Definition at line 1546 of file http.c.

Referenced by http_read(), and http_read_stream_all().

◆ http_read_stream_all()

static int http_read_stream_all	(	URLContext *	h,
		uint8_t *	buf,
		int	size
	)

static

Definition at line 1602 of file http.c.

Referenced by store_icy().

◆ update_metadata()

static void update_metadata	(	URLContext *	h,
		char *	data
	)

static

Definition at line 1614 of file http.c.

Referenced by store_icy().

◆ store_icy()

static int store_icy	(	URLContext *	h,
		int	size
	)

static

Definition at line 1642 of file http.c.

Referenced by http_read().

◆ http_read()

static int http_read	(	URLContext *	h,
		uint8_t *	buf,
		int	size
	)

static

Definition at line 1680 of file http.c.

◆ http_write()

static int http_write	(	URLContext *	h,
		const uint8_t *	buf,
		int	size
	)

static

Definition at line 1697 of file http.c.

◆ http_close()

static int http_close ( URLContext * h )

static

Definition at line 1752 of file http.c.

◆ http_seek()

static int64_t http_seek	(	URLContext *	h,
		int64_t	off,
		int	whence
	)

static

Definition at line 1830 of file http.c.

◆ http_get_file_handle()

static int http_get_file_handle ( URLContext * h )

static

Definition at line 1835 of file http.c.

◆ http_get_short_seek()

static int http_get_short_seek ( URLContext * h )

static

Definition at line 1841 of file http.c.

Variable Documentation

◆ options

const AVOption options[]

static

Definition at line 136 of file http.c.

Referenced by ff_http_do_new_request2(), http_listen(), http_open(), http_open_cnx(), http_open_cnx_internal(), and http_seek_internal().

Data Structures

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

◆ BUFFER_SIZE

◆ MAX_REDIRECTS

◆ HTTP_SINGLE

◆ HTTP_MUTLI

◆ MAX_EXPIRY

◆ WHITESPACES

◆ OFFSET

◆ D

◆ E

◆ DEFAULT_USER_AGENT

◆ NEEDS_ESCAPE

◆ HTTP_CLASS

Enumeration Type Documentation

◆ HandshakeState

Function Documentation

◆ http_connect()

◆ http_read_header()

◆ http_shutdown()

◆ ff_http_init_auth_state()

◆ http_open_cnx_internal()

◆ http_should_reconnect()

◆ http_open_cnx()

◆ ff_http_get_shutdown_status()

◆ ff_http_do_new_request()

◆ ff_http_do_new_request2()

◆ ff_http_averror()

◆ http_write_reply()

◆ handle_http_errors()

◆ http_handshake()

◆ http_listen()

◆ http_open()

◆ http_accept()

◆ http_getc()

◆ http_get_line()

◆ check_http_code()

◆ parse_location()

◆ parse_content_range()

◆ parse_content_encoding()

◆ parse_icy()

◆ parse_set_cookie_expiry_time()

◆ parse_set_cookie()

◆ parse_cookie()

◆ cookie_string()

◆ process_line()

◆ get_cookies()

◆ has_header()

◆ bprint_escaped_path()

◆ http_buf_read()

◆ http_seek_internal()

◆ http_read_stream()

◆ http_read_stream_all()

◆ update_metadata()

◆ store_icy()

◆ http_read()

◆ http_write()

◆ http_close()

◆ http_seek()

◆ http_get_file_handle()

◆ http_get_short_seek()

Variable Documentation

◆ options