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ngx_http_flv_live_module.c
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ngx_http_flv_live_module.c
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/*
* Copyright (C) Winshining
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include "ngx_http_flv_live_module.h"
#include "ngx_rtmp_bandwidth.h"
static ngx_rtmp_play_pt next_play;
static ngx_rtmp_close_stream_pt next_close_stream;
static ngx_int_t ngx_http_flv_live_init(ngx_conf_t *cf);
static void *ngx_http_flv_live_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_flv_live_merge_loc_conf(ngx_conf_t *cf,
void *parent, void *child);
static ngx_int_t ngx_http_flv_live_handler(ngx_http_request_t *r);
static void ngx_http_flv_live_cleanup(void *data);
static ngx_int_t ngx_http_flv_live_init_process(ngx_cycle_t *cycle);
static void ngx_http_flv_live_send_tail(ngx_rtmp_session_t *s);
static ngx_int_t ngx_http_flv_live_send_message(ngx_rtmp_session_t *s,
ngx_chain_t *out, ngx_uint_t priority);
static ngx_chain_t *ngx_http_flv_live_meta_message(ngx_rtmp_session_t *,
ngx_chain_t *in);
static ngx_chain_t *ngx_http_flv_live_append_message(ngx_rtmp_session_t *s,
ngx_rtmp_header_t *h, ngx_rtmp_header_t *lh, ngx_chain_t *in);
static void ngx_http_flv_live_free_message(ngx_rtmp_session_t *s,
ngx_chain_t *in);
static ngx_int_t ngx_http_flv_live_join(ngx_rtmp_session_t *s, u_char *name,
unsigned int publisher);
static ngx_chain_t *ngx_http_flv_live_append_shared_bufs(
ngx_rtmp_core_srv_conf_t *cscf, ngx_rtmp_header_t *h, ngx_chain_t *in,
ngx_flag_t chunked);
static void ngx_http_flv_live_close_http_request(ngx_rtmp_session_t *s);
static ngx_int_t ngx_http_flv_live_headers_filter(ngx_rtmp_session_t *s);
static ngx_int_t ngx_http_flv_live_header_filter(ngx_rtmp_session_t *s);
#if (nginx_version <= 1003014)
static void ngx_http_do_free_request(ngx_http_request_t *r, ngx_int_t rc);
static void ngx_http_do_log_request(ngx_http_request_t *r);
#endif
typedef struct ngx_http_header_val_s ngx_http_header_val_t;
typedef ngx_int_t (*ngx_http_set_header_pt)(ngx_http_request_t *r,
ngx_http_header_val_t *hv, ngx_str_t *value);
typedef struct {
ngx_str_t name;
ngx_uint_t offset;
ngx_http_set_header_pt handler;
} ngx_http_set_header_t;
struct ngx_http_header_val_s {
ngx_http_complex_value_t value;
ngx_str_t key;
ngx_http_set_header_pt handler;
ngx_uint_t offset;
#if (nginx_version >= 1007005)
ngx_uint_t always; /* unsigned always:1 */
#endif
};
typedef enum {
NGX_HTTP_EXPIRES_OFF,
} ngx_http_expires_t;
typedef struct {
ngx_http_expires_t expires;
time_t expires_time;
#if (nginx_version >= 1007009)
ngx_http_complex_value_t *expires_value;
#endif
ngx_array_t *headers;
} ngx_http_headers_conf_t;
extern ngx_module_t ngx_http_headers_filter_module;
static u_char ngx_http_server_string[] = "Server: nginx" CRLF;
static u_char ngx_http_server_full_string[] = "Server: " NGINX_VER CRLF;
#if (nginx_version >= 1011010)
static u_char ngx_http_server_build_string[] = "Server: " NGINX_VER_BUILD CRLF;
#endif
static ngx_str_t ngx_http_status_lines[] = {
ngx_string("200 OK"),
ngx_null_string, /* "201 Created" */
ngx_null_string, /* "202 Accepted" */
ngx_null_string, /* "203 Non-Authoritative Information" */
ngx_null_string, /* "204 No Content" */
ngx_null_string, /* "205 Reset Content" */
ngx_null_string, /* "206 Partial Content" */
/* ngx_null_string, */ /* "207 Multi-Status" */
#define NGX_HTTP_LAST_2XX 207
#define NGX_HTTP_OFF_3XX (NGX_HTTP_LAST_2XX - 200)
/* ngx_null_string, */ /* "300 Multiple Choices" */
ngx_string("301 Moved Permanently"),
ngx_string("302 Moved Temporarily"),
ngx_null_string, /* "303 See Other" */
ngx_null_string, /* "304 Not Modified" */
ngx_null_string, /* "305 Use Proxy" */
ngx_null_string, /* "306 unused" */
ngx_string("307 Temporary Redirect"),
#define NGX_HTTP_LAST_3XX 308
#define NGX_HTTP_OFF_4XX (NGX_HTTP_LAST_3XX - 301 + NGX_HTTP_OFF_3XX)
ngx_string("400 Bad Request"),
ngx_null_string, /* "401 Unauthorized" */
ngx_null_string, /* "402 Payment Required" */
ngx_string("403 Forbidden"),
ngx_string("404 Not Found"),
ngx_string("405 Not Allowed"),
ngx_null_string, /* "406 Not Acceptable" */
ngx_null_string, /* "407 Proxy Authentication Required" */
ngx_null_string, /* "408 Request Time-out" */
ngx_null_string, /* "409 Conflict" */
ngx_null_string, /* "410 Gone" */
ngx_null_string, /* "411 Length Required" */
ngx_null_string, /* "412 Precondition Failed" */
ngx_null_string, /* "413 Request Entity Too Large" */
ngx_null_string, /* "414 Request-URI Too Large" */
ngx_null_string, /* "415 Unsupported Media Type" */
ngx_null_string, /* "416 Requested Range Not Satisfiable" */
ngx_null_string, /* "417 Expectation Failed" */
ngx_null_string, /* "418 unused" */
ngx_null_string, /* "419 unused" */
ngx_null_string, /* "420 unused" */
ngx_null_string, /* "421 Misdirected Request" */
/* ngx_null_string, */ /* "422 Unprocessable Entity" */
/* ngx_null_string, */ /* "423 Locked" */
/* ngx_null_string, */ /* "424 Failed Dependency" */
#define NGX_HTTP_LAST_4XX 422
#define NGX_HTTP_OFF_5XX (NGX_HTTP_LAST_4XX - 400 + NGX_HTTP_OFF_4XX)
ngx_string("500 Internal Server Error"),
ngx_null_string, /* "501 Not Implemented" */
ngx_null_string, /* "502 Bad Gateway" */
ngx_string("503 Service Temporarily Unavailable"),
ngx_null_string, /* "504 Gateway Time-out" */
ngx_null_string, /* "505 HTTP Version Not Supported" */
ngx_null_string, /* "506 Variant Also Negotiates" */
ngx_null_string, /* "507 Insufficient Storage" */
/* ngx_null_string, */ /* "508 unused" */
/* ngx_null_string, */ /* "509 unused" */
/* ngx_null_string, */ /* "510 Not Extended" */
#define NGX_HTTP_LAST_5XX 508
};
extern ngx_rtmp_live_proc_handler_t ngx_rtmp_live_proc_handler;
static ngx_rtmp_live_proc_handler_t ngx_http_flv_live_proc_handler = {
NULL,
NULL,
NULL,
NULL,
ngx_http_flv_live_send_message,
ngx_http_flv_live_meta_message,
ngx_http_flv_live_append_message,
ngx_http_flv_live_free_message
};
ngx_rtmp_live_proc_handler_t *ngx_rtmp_live_proc_handlers[] = {
&ngx_rtmp_live_proc_handler,
&ngx_http_flv_live_proc_handler
};
static ngx_int_t ngx_http_flv_live_init_handlers(ngx_cycle_t *cycle);
static ngx_int_t ngx_http_flv_live_request(ngx_rtmp_session_t *s,
ngx_rtmp_header_t *h, ngx_chain_t *in);
static void ngx_http_flv_live_free_request(ngx_rtmp_session_t *s);
static void ngx_http_flv_live_read_handler(ngx_event_t *rev);
static void ngx_http_flv_live_write_handler(ngx_event_t *wev);
static ngx_int_t ngx_http_flv_live_preprocess(ngx_http_request_t *r,
ngx_rtmp_connection_t *rconn);
static ngx_rtmp_session_t *ngx_http_flv_live_init_connection(
ngx_http_request_t *r, ngx_rtmp_connection_t *rconn);
static ngx_rtmp_session_t *ngx_http_flv_live_init_session(
ngx_http_request_t *r, ngx_rtmp_addr_conf_t *add_conf);
static ngx_int_t ngx_http_flv_live_connect_init(ngx_rtmp_session_t *s,
ngx_str_t *app, ngx_str_t *stream);
static ngx_http_module_t ngx_http_flv_live_module_ctx = {
NULL,
ngx_http_flv_live_init, /* postconfiguration */
NULL,
NULL,
NULL,
NULL,
ngx_http_flv_live_create_loc_conf, /* create location configuration */
ngx_http_flv_live_merge_loc_conf /* merge location configuration */
};
static ngx_command_t ngx_http_flv_live_commands[] = {
{ ngx_string("flv_live"),
NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_flv_live_conf_t, flv_live),
NULL },
ngx_null_command
};
ngx_module_t ngx_http_flv_live_module = {
NGX_MODULE_V1,
&ngx_http_flv_live_module_ctx,
ngx_http_flv_live_commands,
NGX_HTTP_MODULE,
NULL,
NULL,
ngx_http_flv_live_init_process,
NULL,
NULL,
NULL,
NULL,
NGX_MODULE_V1_PADDING
};
static ngx_int_t
ngx_http_flv_live_init(ngx_conf_t *cf)
{
ngx_http_handler_pt *h;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
/* insert in the NGX_HTTP_CONTENT_PHASE */
h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_http_flv_live_handler;
return NGX_OK;
}
static void *
ngx_http_flv_live_create_loc_conf(ngx_conf_t *cf)
{
ngx_http_flv_live_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_flv_live_conf_t));
if (conf == NULL) {
return NULL;
}
conf->flv_live = NGX_CONF_UNSET;
return (void *) conf;
}
static char *
ngx_http_flv_live_merge_loc_conf(ngx_conf_t *cf,
void *parent, void *child)
{
ngx_http_flv_live_conf_t *prev = parent;
ngx_http_flv_live_conf_t *conf = child;
ngx_conf_merge_value(conf->flv_live, prev->flv_live, 0);
return NGX_CONF_OK;
}
ngx_int_t
ngx_http_flv_live_init_handlers(ngx_cycle_t *cycle)
{
ngx_rtmp_core_main_conf_t *cmcf;
ngx_rtmp_handler_pt *h;
cmcf = ngx_rtmp_cycle_get_module_main_conf(cycle, ngx_rtmp_core_module);
if (cmcf == NULL) {
return NGX_OK;
}
/* rtmp live conf aready exsits, so add additional event handlers */
h = ngx_array_push(&cmcf->events[NGX_HTTP_FLV_LIVE_REQUEST]);
*h = ngx_http_flv_live_request;
next_play = http_flv_live_next_play;
next_close_stream = http_flv_live_next_close_stream;
http_flv_live_next_play = NULL;
http_flv_live_next_close_stream = NULL;
return NGX_OK;
}
static ngx_int_t
ngx_http_flv_live_init_process(ngx_cycle_t *cycle)
{
return ngx_http_flv_live_init_handlers(cycle);
}
/*
* chunk format:
* hex1\r\n
* content1(hex1)\r\n
* hex2\r\n
* content2(hex2)\r\n
* ...
* 0\r\n\r\n
*/
ngx_int_t
ngx_http_flv_live_send_header(ngx_rtmp_session_t *s)
{
ngx_rtmp_core_srv_conf_t *cscf;
ngx_http_core_loc_conf_t *clcf;
ngx_http_request_t *r;
ngx_rtmp_live_ctx_t *live_ctx;
ngx_rtmp_codec_ctx_t *codec_ctx;
ngx_list_part_t *part;
ngx_table_elt_t *e, *header;
u_char *p;
ngx_chain_t cl_flv_hdr, *pkt;
ngx_buf_t buf_flv_hdr;
ngx_uint_t i;
ngx_str_t chunked_flv_header;
ngx_str_t consec_flv_header;
u_char chunked_flv_header_data[18];
ngx_flag_t connection_header;
/**
* |F|L|V|ver|00000101|header_size|0|0|0|0|, ngx_http_flv_module.c
* for more details, please refer to http://www.adobe.com/devnet/f4v.html
**/
u_char flv_header[] = "FLV\x1\0\0\0\0\x9\0\0\0\0";
r = s->data;
r->headers_out.status = NGX_HTTP_OK;
ngx_str_set(&r->headers_out.content_type, "video/x-flv");
/* fill HTTP header 'Connection' according to headers_in */
r->keepalive = 0;
connection_header = 0;
part = &r->headers_in.headers.part;
header = part->elts;
for (i = 0; /* void */; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
header = part->elts;
i = 0;
}
if (header[i].hash == 0) {
continue;
}
if (ngx_strcasecmp(header[i].key.data, (u_char *) "connection") == 0) {
connection_header = 1;
if (ngx_strcasecmp(header[i].value.data, (u_char *) "keep-alive")
== 0)
{
r->keepalive = 1;
}
break;
}
}
if (!connection_header && r->http_version == NGX_HTTP_VERSION_11) {
r->keepalive = 1;
}
live_ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_live_module);
if (live_ctx && !live_ctx->active) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"flv live: try to send header when session not active");
return NGX_ERROR;
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
codec_ctx = ngx_rtmp_get_module_ctx(s->publisher, ngx_rtmp_codec_module);
if (codec_ctx->video_codec_id != 0) {
flv_header[4] |= 0x1;
}
if (codec_ctx->audio_codec_id != 0
&& codec_ctx->audio_codec_id != NGX_RTMP_AUDIO_UNCOMPRESSED)
{
flv_header[4] |= (0x1 << 2);
}
if (clcf->chunked_transfer_encoding &&
r->http_version == NGX_HTTP_VERSION_11)
{
r->chunked = 1;
p = chunked_flv_header_data;
*p++ = 'd';
*p++ = CR;
*p++ = LF;
ngx_memmove(p, flv_header, 13);
p += 13;
*p++ = CR;
*p++ = LF;
chunked_flv_header.data = chunked_flv_header_data;
chunked_flv_header.len = 18;
buf_flv_hdr.pos = chunked_flv_header.data;
buf_flv_hdr.last = chunked_flv_header.data + chunked_flv_header.len;
} else {
consec_flv_header.data = flv_header;
consec_flv_header.len = 13;
buf_flv_hdr.pos = consec_flv_header.data;
buf_flv_hdr.last = consec_flv_header.data + consec_flv_header.len;
}
e = r->headers_out.expires;
if (e == NULL) {
e = ngx_list_push(&r->headers_out.headers);
if (e == NULL) {
return NGX_ERROR;
}
r->headers_out.expires = e;
e->hash = 1;
ngx_str_set(&e->key, "Expires");
}
e->value.data = (u_char *) "-1";
e->value.len = ngx_strlen("-1");
if (ngx_http_flv_live_headers_filter(s) == NGX_ERROR) {
return NGX_ERROR;
}
buf_flv_hdr.start = buf_flv_hdr.pos;
buf_flv_hdr.end = buf_flv_hdr.last;
cl_flv_hdr.buf = &buf_flv_hdr;
cl_flv_hdr.next = NULL;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
pkt = ngx_rtmp_append_shared_bufs(cscf, NULL, &cl_flv_hdr);
if (pkt == NULL) {
return NGX_ERROR;
}
ngx_http_flv_live_send_message(s, pkt, 0);
ngx_rtmp_free_shared_chain(cscf, pkt);
return NGX_OK;
}
/**
* for adding non-standard HTTP headers
**/
static ngx_int_t
ngx_http_flv_live_headers_filter(ngx_rtmp_session_t *s)
{
ngx_str_t value;
ngx_uint_t i, safe_status;
ngx_http_header_val_t *h;
ngx_http_headers_conf_t *conf;
ngx_http_request_t *r;
r = s->data;
conf = ngx_http_get_module_loc_conf(r, ngx_http_headers_filter_module);
/* force */
conf->expires = NGX_HTTP_EXPIRES_OFF;
if (conf->headers == NULL) {
return ngx_http_flv_live_header_filter(s);
}
switch (r->headers_out.status) {
case NGX_HTTP_OK:
case NGX_HTTP_CREATED:
case NGX_HTTP_NO_CONTENT:
case NGX_HTTP_PARTIAL_CONTENT:
case NGX_HTTP_MOVED_PERMANENTLY:
case NGX_HTTP_MOVED_TEMPORARILY:
case NGX_HTTP_SEE_OTHER:
case NGX_HTTP_NOT_MODIFIED:
case NGX_HTTP_TEMPORARY_REDIRECT:
safe_status = 1;
break;
default:
safe_status = 0;
}
if (conf->headers) {
h = conf->headers->elts;
for (i = 0; i < conf->headers->nelts; i++) {
#if (nginx_version >= 1007005)
if (!safe_status && !h[i].always) {
continue;
}
#endif
if (ngx_http_complex_value(r, &h[i].value, &value) != NGX_OK) {
return NGX_ERROR;
}
if (h[i].handler(r, &h[i], &value) != NGX_OK) {
return NGX_ERROR;
}
}
}
return ngx_http_flv_live_header_filter(s);
}
static ngx_int_t
ngx_http_flv_live_header_filter(ngx_rtmp_session_t *s)
{
u_char *p;
size_t len;
ngx_str_t *status_line;
ngx_buf_t *b;
ngx_uint_t status, i;
ngx_chain_t out, *pkt;
ngx_list_part_t *part;
ngx_table_elt_t *header;
ngx_http_core_loc_conf_t *clcf;
ngx_rtmp_core_srv_conf_t *cscf;
ngx_http_request_t *r;
r = s->data;
if (r->header_sent) {
return NGX_OK;
}
r->header_sent = 1;
if (r->chunked && r->http_version < NGX_HTTP_VERSION_11) {
ngx_log_error(NGX_LOG_WARN, s->connection->log, 0,
"flv live: chunked only supported by HTTP/1.1");
r->chunked = 0;
}
len = sizeof("HTTP/1.x ") - 1 + sizeof(CRLF) - 1
/* the end of the header */
+ sizeof(CRLF) - 1;
/* status line */
if (r->headers_out.status_line.len) {
len += r->headers_out.status_line.len;
status_line = &r->headers_out.status_line;
#if (NGX_SUPPRESS_WARN)
status = 0;
#endif
} else {
status = r->headers_out.status;
if (status >= NGX_HTTP_OK
&& status < NGX_HTTP_LAST_2XX)
{
/* 2XX */
status -= NGX_HTTP_OK;
status_line = &ngx_http_status_lines[status];
len += ngx_http_status_lines[status].len;
} else if (status >= NGX_HTTP_MOVED_PERMANENTLY
&& status < NGX_HTTP_LAST_3XX)
{
/* 3XX */
status = status - NGX_HTTP_MOVED_PERMANENTLY + NGX_HTTP_OFF_3XX;
status_line = &ngx_http_status_lines[status];
len += ngx_http_status_lines[status].len;
} else if (status >= NGX_HTTP_BAD_REQUEST
&& status < NGX_HTTP_LAST_4XX)
{
/* 4XX */
status = status - NGX_HTTP_BAD_REQUEST
+ NGX_HTTP_OFF_4XX;
status_line = &ngx_http_status_lines[status];
len += ngx_http_status_lines[status].len;
} else if (status >= NGX_HTTP_INTERNAL_SERVER_ERROR
&& status < NGX_HTTP_LAST_5XX)
{
/* 5XX */
status = status - NGX_HTTP_INTERNAL_SERVER_ERROR
+ NGX_HTTP_OFF_5XX;
status_line = &ngx_http_status_lines[status];
len += ngx_http_status_lines[status].len;
} else {
len += NGX_INT_T_LEN + 1 /* SP */;
status_line = NULL;
}
if (status_line && status_line->len == 0) {
status = r->headers_out.status;
len += NGX_INT_T_LEN + 1 /* SP */;
status_line = NULL;
}
}
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (r->headers_out.server == NULL) {
#if (nginx_version >= 1011010)
if (clcf->server_tokens == NGX_HTTP_SERVER_TOKENS_ON) {
len += sizeof(ngx_http_server_full_string) - 1;
} else if (clcf->server_tokens == NGX_HTTP_SERVER_TOKENS_BUILD) {
len += sizeof(ngx_http_server_build_string) - 1;
} else {
len += sizeof(ngx_http_server_string) - 1;
}
#else
len += clcf->server_tokens ? sizeof(ngx_http_server_full_string) - 1 :
sizeof(ngx_http_server_string) - 1;
#endif
}
if (r->headers_out.date == NULL) {
len += sizeof("Date: Mon, 28 Sep 1970 06:00:00 GMT" CRLF) - 1;
}
if (r->headers_out.content_type.len) {
len += sizeof("Content-Type: ") - 1
+ r->headers_out.content_type.len + 2;
if (r->headers_out.content_type_len == r->headers_out.content_type.len
&& r->headers_out.charset.len)
{
len += sizeof("; charset=") - 1 + r->headers_out.charset.len;
}
}
if (r->headers_out.content_length == NULL
&& r->headers_out.content_length_n >= 0)
{
len += sizeof("Content-Length: ") - 1 + NGX_OFF_T_LEN + 2;
}
if (r->headers_out.last_modified == NULL
&& r->headers_out.last_modified_time != -1)
{
len += sizeof("Last-Modified: Mon, 28 Sep 1970 06:00:00 GMT" CRLF) - 1;
}
if (r->chunked) {
len += sizeof("Transfer-Encoding: chunked" CRLF) - 1;
}
if (r->keepalive) {
len += sizeof("Connection: keep-alive" CRLF) - 1;
/*
* MSIE and Opera ignore the "Keep-Alive: timeout=<N>" header.
* MSIE keeps the connection alive for about 60-65 seconds.
* Opera keeps the connection alive very long.
* Mozilla keeps the connection alive for N plus about 1-10 seconds.
* Konqueror keeps the connection alive for about N seconds.
*/
if (clcf->keepalive_header) {
len += sizeof("Keep-Alive: timeout=") - 1 + NGX_TIME_T_LEN + 2;
}
} else {
len += sizeof("Connection: close" CRLF) - 1;
}
part = &r->headers_out.headers.part;
header = part->elts;
for (i = 0; /* void */; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
header = part->elts;
i = 0;
}
if (header[i].hash == 0) {
continue;
}
len += header[i].key.len + sizeof(": ") - 1 + header[i].value.len
+ sizeof(CRLF) - 1;
}
b = ngx_create_temp_buf(r->pool, len);
if (b == NULL) {
return NGX_ERROR;
}
/* "HTTP/1.x " */
if (r->http_version == NGX_HTTP_VERSION_10) {
b->last = ngx_cpymem(b->last, "HTTP/1.0 ", sizeof("HTTP/1.x ") - 1);
} else {
b->last = ngx_cpymem(b->last, "HTTP/1.1 ", sizeof("HTTP/1.x ") - 1);
}
/* status line */
if (status_line) {
b->last = ngx_copy(b->last, status_line->data, status_line->len);
} else {
b->last = ngx_sprintf(b->last, "%03ui ", status);
}
*b->last++ = CR; *b->last++ = LF;
if (r->headers_out.server == NULL) {
#if (nginx_version >= 1011010)
if (clcf->server_tokens == NGX_HTTP_SERVER_TOKENS_ON) {
p = ngx_http_server_full_string;
len = sizeof(ngx_http_server_full_string) - 1;
} else if (clcf->server_tokens == NGX_HTTP_SERVER_TOKENS_BUILD) {
p = ngx_http_server_build_string;
len = sizeof(ngx_http_server_build_string) - 1;
} else {
#else
if (clcf->server_tokens) {
p = (u_char *) ngx_http_server_full_string;
len = sizeof(ngx_http_server_full_string) - 1;
} else {
#endif
p = ngx_http_server_string;
len = sizeof(ngx_http_server_string) - 1;
}
b->last = ngx_cpymem(b->last, p, len);
}
if (r->headers_out.date == NULL) {
b->last = ngx_cpymem(b->last, "Date: ", sizeof("Date: ") - 1);
b->last = ngx_cpymem(b->last, ngx_cached_http_time.data,
ngx_cached_http_time.len);
*b->last++ = CR; *b->last++ = LF;
}
if (r->headers_out.content_type.len) {
b->last = ngx_cpymem(b->last, "Content-Type: ",
sizeof("Content-Type: ") - 1);
p = b->last;
b->last = ngx_copy(b->last, r->headers_out.content_type.data,
r->headers_out.content_type.len);
if (r->headers_out.content_type_len == r->headers_out.content_type.len
&& r->headers_out.charset.len)
{
b->last = ngx_cpymem(b->last, "; charset=",
sizeof("; charset=") - 1);
b->last = ngx_copy(b->last, r->headers_out.charset.data,
r->headers_out.charset.len);
/* update r->headers_out.content_type for possible logging */
r->headers_out.content_type.len = b->last - p;
r->headers_out.content_type.data = p;
}
*b->last++ = CR; *b->last++ = LF;
}
if (r->chunked) {
b->last = ngx_cpymem(b->last, "Transfer-Encoding: chunked" CRLF,
sizeof("Transfer-Encoding: chunked" CRLF) - 1);
}
if (r->keepalive) {
b->last = ngx_cpymem(b->last, "Connection: keep-alive" CRLF,
sizeof("Connection: keep-alive" CRLF) - 1);
if (clcf->keepalive_header) {
b->last = ngx_sprintf(b->last, "Keep-Alive: timeout=%T" CRLF,
clcf->keepalive_header);
}
} else {
b->last = ngx_cpymem(b->last, "Connection: close" CRLF,
sizeof("Connection: close" CRLF) - 1);
}
part = &r->headers_out.headers.part;
header = part->elts;
for (i = 0; /* void */; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
header = part->elts;
i = 0;
}
if (header[i].hash == 0) {
continue;
}
b->last = ngx_copy(b->last, header[i].key.data, header[i].key.len);
*b->last++ = ':'; *b->last++ = ' ';
b->last = ngx_copy(b->last, header[i].value.data, header[i].value.len);
*b->last++ = CR; *b->last++ = LF;
}
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"%*s", (size_t) (b->last - b->pos), b->pos);
/* the end of HTTP header */
*b->last++ = CR;
*b->last++ = LF;
r->header_size = b->last - b->pos;
out.buf = b;
out.next = NULL;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
pkt = ngx_rtmp_append_shared_bufs(cscf, NULL, &out);
if (pkt == NULL) {
return NGX_ERROR;
}
ngx_http_flv_live_send_message(s, pkt, 0);
ngx_rtmp_free_shared_chain(cscf, pkt);
return NGX_OK;
}
static void
ngx_http_flv_live_send_tail(ngx_rtmp_session_t *s)
{
ngx_rtmp_core_srv_conf_t *cscf;
ngx_chain_t cl_resp_hdr, *pkt;
ngx_buf_t buf_resp_hdr;
const ngx_str_t response_tail = ngx_string("0" CRLF CRLF);
buf_resp_hdr.pos = response_tail.data;
buf_resp_hdr.last = response_tail.data + response_tail.len;
buf_resp_hdr.start = buf_resp_hdr.pos;
buf_resp_hdr.end = buf_resp_hdr.last;
cl_resp_hdr.buf = &buf_resp_hdr;
cl_resp_hdr.next = NULL;
cscf = ngx_rtmp_get_module_srv_conf(s, ngx_rtmp_core_module);
pkt = ngx_rtmp_append_shared_bufs(cscf, NULL, &cl_resp_hdr);
ngx_http_flv_live_send_message(s, pkt, 0);
ngx_rtmp_free_shared_chain(cscf, pkt);
}
static ngx_int_t
ngx_http_flv_live_send_message(ngx_rtmp_session_t *s,
ngx_chain_t *out, ngx_uint_t priority)
{
ngx_uint_t nmsg;
nmsg = (s->out_last + s->out_queue - s->out_pos) % s->out_queue + 1;
if (priority > 3) {
priority = 3;
}
/* drop packet?
* Note we always leave 1 slot free */
if (nmsg + priority * s->out_queue / 4 >= s->out_queue) {
ngx_log_debug2(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"flv live: HTTP drop message bufs=%ui, priority=%ui",
nmsg, priority);
return NGX_AGAIN;
}
s->out[s->out_last++] = out;
s->out_last %= s->out_queue;
ngx_rtmp_acquire_shared_chain(out);
ngx_log_debug3(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"flv live: HTTP send nmsg=%ui, priority=%ui #%ui",
nmsg, priority, s->out_last);
if (priority && s->out_buffer && nmsg < s->out_cork) {
return NGX_OK;
}
if (!s->connection->write->active) {
ngx_http_flv_live_write_handler(s->connection->write);
}
return NGX_OK;
}
static ngx_int_t
ngx_http_flv_live_request(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
ngx_chain_t *in)
{
static ngx_rtmp_play_t v;
ngx_int_t rc;
ngx_http_request_t *r;
ngx_http_flv_live_ctx_t *ctx;
r = s->data;
ctx = ngx_http_get_module_ctx(r, ngx_http_flv_live_module);
rc = ngx_http_flv_live_connect_init(s, &ctx->app, &ctx->stream);
if (rc != NGX_OK) {
return NGX_ERROR;
}
if (s->notify_connect) {
return NGX_OK;
}
ngx_memzero(&v, sizeof(ngx_rtmp_play_t));
ngx_memcpy(v.name, ctx->stream.data, ngx_min(ctx->stream.len,