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ARI: External Media

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The Channel resource has a new sub-resource "externalMedia".
This allows an application to create a channel for the sole purpose
of exchanging media with an external server.  Once created, this
channel could be placed into a bridge with existing channels to
allow the external server to inject audio into the bridge or
receive audio from the bridge.
See https://wiki.asterisk.org/wiki/display/AST/External+Media+and+ARI
for more information.

Change-Id: I9618899198880b4c650354581b50c0401b58bc46
This commit is contained in:
George Joseph
2019-08-05 05:59:59 -06:00
parent 1839224c15
commit 2ae1a22e0e
7 changed files with 579 additions and 24 deletions
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135
res/res_ari_channels.c
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@@ -2811,6 +2811,128 @@ static void ast_ari_channels_rtpstatistics_cb(
}
#endif /* AST_DEVMODE */
fin: __attribute__((unused))
return;
}
int ast_ari_channels_external_media_parse_body(
struct ast_json *body,
struct ast_ari_channels_external_media_args *args)
{
struct ast_json *field;
/* Parse query parameters out of it */
field = ast_json_object_get(body, "channelId");
if (field) {
args->channel_id = ast_json_string_get(field);
}
field = ast_json_object_get(body, "app");
if (field) {
args->app = ast_json_string_get(field);
}
field = ast_json_object_get(body, "external_host");
if (field) {
args->external_host = ast_json_string_get(field);
}
field = ast_json_object_get(body, "encapsulation");
if (field) {
args->encapsulation = ast_json_string_get(field);
}
field = ast_json_object_get(body, "transport");
if (field) {
args->transport = ast_json_string_get(field);
}
field = ast_json_object_get(body, "connection_type");
if (field) {
args->connection_type = ast_json_string_get(field);
}
field = ast_json_object_get(body, "format");
if (field) {
args->format = ast_json_string_get(field);
}
field = ast_json_object_get(body, "direction");
if (field) {
args->direction = ast_json_string_get(field);
}
return 0;
}
/*!
* \brief Parameter parsing callback for /channels/externalMedia.
* \param get_params GET parameters in the HTTP request.
* \param path_vars Path variables extracted from the request.
* \param headers HTTP headers.
* \param[out] response Response to the HTTP request.
*/
static void ast_ari_channels_external_media_cb(
struct ast_tcptls_session_instance *ser,
struct ast_variable *get_params, struct ast_variable *path_vars,
struct ast_variable *headers, struct ast_json *body, struct ast_ari_response *response)
{
struct ast_ari_channels_external_media_args args = {};
struct ast_variable *i;
#if defined(AST_DEVMODE)
int is_valid;
int code;
#endif /* AST_DEVMODE */
for (i = get_params; i; i = i->next) {
if (strcmp(i->name, "channelId") == 0) {
args.channel_id = (i->value);
} else
if (strcmp(i->name, "app") == 0) {
args.app = (i->value);
} else
if (strcmp(i->name, "external_host") == 0) {
args.external_host = (i->value);
} else
if (strcmp(i->name, "encapsulation") == 0) {
args.encapsulation = (i->value);
} else
if (strcmp(i->name, "transport") == 0) {
args.transport = (i->value);
} else
if (strcmp(i->name, "connection_type") == 0) {
args.connection_type = (i->value);
} else
if (strcmp(i->name, "format") == 0) {
args.format = (i->value);
} else
if (strcmp(i->name, "direction") == 0) {
args.direction = (i->value);
} else
{}
}
args.variables = body;
ast_ari_channels_external_media(headers, &args, response);
#if defined(AST_DEVMODE)
code = response->response_code;
switch (code) {
case 0: /* Implementation is still a stub, or the code wasn't set */
is_valid = response->message == NULL;
break;
case 500: /* Internal Server Error */
case 501: /* Not Implemented */
case 400: /* Invalid parameters */
case 409: /* Channel is not in a Stasis application; Channel is already bridged */
is_valid = 1;
break;
default:
if (200 <= code && code <= 299) {
is_valid = ast_ari_validate_external_media(
response->message);
} else {
ast_log(LOG_ERROR, "Invalid error response %d for /channels/externalMedia\n", code);
is_valid = 0;
}
}
if (!is_valid) {
ast_log(LOG_ERROR, "Response validation failed for /channels/externalMedia\n");
ast_ari_response_error(response, 500,
"Internal Server Error", "Response validation failed");
}
#endif /* AST_DEVMODE */
fin: __attribute__((unused))
return;
}
@@ -3007,14 +3129,23 @@ static struct stasis_rest_handlers channels_channelId = {
.children = { &channels_channelId_continue,&channels_channelId_move,&channels_channelId_redirect,&channels_channelId_answer,&channels_channelId_ring,&channels_channelId_dtmf,&channels_channelId_mute,&channels_channelId_hold,&channels_channelId_moh,&channels_channelId_silence,&channels_channelId_play,&channels_channelId_record,&channels_channelId_variable,&channels_channelId_snoop,&channels_channelId_dial,&channels_channelId_rtp_statistics, }
};
/*! \brief REST handler for /api-docs/channels.json */
static struct stasis_rest_handlers channels_externalMedia = {
.path_segment = "externalMedia",
.callbacks = {
[AST_HTTP_POST] = ast_ari_channels_external_media_cb,
},
.num_children = 0,
.children = { }
};
/*! \brief REST handler for /api-docs/channels.json */
static struct stasis_rest_handlers channels = {
.path_segment = "channels",
.callbacks = {
[AST_HTTP_GET] = ast_ari_channels_list_cb,
[AST_HTTP_POST] = ast_ari_channels_originate_cb,
},
.num_children = 2,
.children = { &channels_create,&channels_channelId, }
.num_children = 3,
.children = { &channels_create,&channels_channelId,&channels_externalMedia, }
};
static int unload_module(void)