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ARI: Add the ability to download the media associated with a stored recording

Browse Source 
This patch adds a new feature to ARI that allows a client to download
the media associated with a stored recording. The new route is
/recordings/stored/{name}/file, and transmits the underlying binary file
using Asterisk's HTTP server's underlying file transfer facilities.

Because this REST route returns non-JSON, a few small enhancements had
to be made to the Python Swagger generation code, as well as the
mustache templates that generate the ARI bindings.

ASTERISK-26042 #close

Change-Id: I49ec5c4afdec30bb665d9c977ab423b5387e0181
changes/76/2876/2
Matt Jordan 9 years ago
parent d4b77dad1b
commit e773e3a9bb
12 changed files with 235 additions and 5 deletions
Show Stats Download Patch File Download Diff File

4
CHANGES
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@ -32,6 +32,10 @@ ARI
back to the resource. The "PlaybackFinished" event is raised when all media
URIs are done.
* Stored recordings now allow for the media associated with a stored recording
to be retrieved. The new route, GET /recordings/stored/{name}/file, will
transmit the raw media file to the requester as binary.
Applications
------------------

2
include/asterisk/ari.h
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@ -95,6 +95,8 @@ struct ast_ari_response {
/*! HTTP response code.
* See http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html */
int response_code;
/*! File descriptor for whatever file we want to respond with */
int fd;
/*! Corresponding text for the response code */
const char *response_text; /* Shouldn't http.c handle this? */
/*! Flag to indicate that no further response is needed */

24
include/asterisk/stasis_app_recording.h
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@ -48,6 +48,30 @@ struct stasis_app_stored_recording;
const char *stasis_app_stored_recording_get_file(
struct stasis_app_stored_recording *recording);
/*!
* \brief Returns the full filename, with extension, for this recording.
* \since 14.0.0
*
* \param recording Recording to query.
*
* \return Absolute path to the recording file, with the extension.
* \return \c NULL on error
*/
const char *stasis_app_stored_recording_get_filename(
struct stasis_app_stored_recording *recording);
/*!
* \brief Returns the extension for this recording.
* \since 14.0.0
*
* \param recording Recording to query.
*
* \return The extension associated with this recording.
* \return \c NULL on error
*/
const char *stasis_app_stored_recording_get_extension(
struct stasis_app_stored_recording *recording);
/*!
* \brief Convert stored recording info to JSON.
*

44
res/ari/resource_recordings.c
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@ -101,6 +101,50 @@ void ast_ari_recordings_get_stored(struct ast_variable *headers,
ast_ari_response_ok(response, json);
}
void ast_ari_recordings_get_stored_file(struct ast_tcptls_session_instance *ser,
struct ast_variable *headers, struct ast_ari_recordings_get_stored_file_args *args,
struct ast_ari_response *response)
{
RAII_VAR(struct stasis_app_stored_recording *, recording,
stasis_app_stored_recording_find_by_name(args->recording_name),
ao2_cleanup);
static const char *format_type_names[AST_MEDIA_TYPE_TEXT + 1] = {
[AST_MEDIA_TYPE_UNKNOWN] = "binary",
[AST_MEDIA_TYPE_AUDIO] = "audio",
[AST_MEDIA_TYPE_VIDEO] = "video",
[AST_MEDIA_TYPE_IMAGE] = "image",
[AST_MEDIA_TYPE_TEXT] = "text",
};
struct ast_format *format;
response->message = ast_json_null();
if (!recording) {
ast_ari_response_error(response, 404, "Not Found",
"Recording not found");
return;
}
format = ast_get_format_for_file_ext(stasis_app_stored_recording_get_extension(recording));
if (!format) {
ast_ari_response_error(response, 500, "Internal Server Error",
"Format specified by recording not available or loaded");
return;
}
response->fd = open(stasis_app_stored_recording_get_filename(recording), O_RDONLY);
if (response->fd < 0) {
ast_ari_response_error(response, 403, "Forbidden",
"Recording could not be opened");
return;
}
ast_str_append(&response->headers, 0, "Content-Type: %s/%s\r\n",
format_type_names[ast_format_get_type(format)],
stasis_app_stored_recording_get_extension(recording));
ast_ari_response_ok(response, ast_json_null());
}
void ast_ari_recordings_copy_stored(struct ast_variable *headers,
struct ast_ari_recordings_copy_stored_args *args,
struct ast_ari_response *response)

14
res/ari/resource_recordings.h
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@ -76,6 +76,20 @@ struct ast_ari_recordings_delete_stored_args {
* \param[out] response HTTP response
*/
void ast_ari_recordings_delete_stored(struct ast_variable *headers, struct ast_ari_recordings_delete_stored_args *args, struct ast_ari_response *response);
/*! Argument struct for ast_ari_recordings_get_stored_file() */
struct ast_ari_recordings_get_stored_file_args {
/*! The name of the recording */
const char *recording_name;
};
/*!
* \brief Get the file associated with the stored recording.
*
* \param ser TCP/TLS session instance
* \param headers HTTP headers
* \param args Swagger parameters
* \param[out] response HTTP response
*/
void ast_ari_recordings_get_stored_file(struct ast_tcptls_session_instance *ser, struct ast_variable *headers, struct ast_ari_recordings_get_stored_file_args *args, struct ast_ari_response *response);
/*! Argument struct for ast_ari_recordings_copy_stored() */
struct ast_ari_recordings_copy_stored_args {
/*! The name of the recording to copy */

8
res/res_ari.c
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@ -870,7 +870,7 @@ static int ast_ari_callback(struct ast_tcptls_session_instance *ser,
RAII_VAR(struct ast_ari_conf *, conf, NULL, ao2_cleanup);
RAII_VAR(struct ast_str *, response_body, ast_str_create(256), ast_free);
RAII_VAR(struct ast_ari_conf_user *, user, NULL, ao2_cleanup);
struct ast_ari_response response = {};
struct ast_ari_response response = { .fd = -1, 0 };
RAII_VAR(struct ast_variable *, post_vars, NULL, ast_variables_destroy);
if (!response_body) {
@ -1011,11 +1011,14 @@ request_failed:
response.response_text, ast_str_buffer(response.headers), ast_str_buffer(response_body));
ast_http_send(ser, method, response.response_code,
response.response_text, response.headers, response_body,
0, 0);
response.fd != -1 ? response.fd : 0, 0);
/* ast_http_send takes ownership, so we don't have to free them */
response_body = NULL;
ast_json_unref(response.message);
if (response.fd >= 0) {
close(response.fd);
}
return 0;
}
@ -1023,7 +1026,6 @@ static struct ast_http_uri http_uri = {
.callback = ast_ari_callback,
.description = "Asterisk RESTful API",
.uri = "ari",
.has_subtree = 1,
.data = NULL,
.key = __FILE__,

72
res/res_ari_recordings.c
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@ -218,6 +218,65 @@ static void ast_ari_recordings_delete_stored_cb(
}
#endif /* AST_DEVMODE */
fin: __attribute__((unused))
return;
}
/*!
* \brief Parameter parsing callback for /recordings/stored/{recordingName}/file.
* \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_recordings_get_stored_file_cb(
struct ast_tcptls_session_instance *ser,
struct ast_variable *get_params, struct ast_variable *path_vars,
struct ast_variable *headers, struct ast_ari_response *response)
{
struct ast_ari_recordings_get_stored_file_args args = {};
struct ast_variable *i;
RAII_VAR(struct ast_json *, body, NULL, ast_json_unref);
#if defined(AST_DEVMODE)
int is_valid;
int code;
#endif /* AST_DEVMODE */
for (i = path_vars; i; i = i->next) {
if (strcmp(i->name, "recordingName") == 0) {
args.recording_name = (i->value);
} else
{}
}
ast_ari_recordings_get_stored_file(ser, 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 404: /* Recording not found */
is_valid = 1;
break;
default:
if (200 <= code && code <= 299) {
/* No validation on a raw binary response */
is_valid = 1;
} else {
ast_log(LOG_ERROR, "Invalid error response %d for /recordings/stored/{recordingName}/file\n", code);
is_valid = 0;
}
}
if (!is_valid) {
ast_log(LOG_ERROR, "Response validation failed for /recordings/stored/{recordingName}/file\n");
ast_ari_response_error(response, 500,
"Internal Server Error", "Response validation failed");
}
#endif /* AST_DEVMODE */
fin: __attribute__((unused))
return;
}
@ -737,6 +796,15 @@ fin: __attribute__((unused))
return;
}
/*! \brief REST handler for /api-docs/recordings.{format} */
static struct stasis_rest_handlers recordings_stored_recordingName_file = {
.path_segment = "file",
.callbacks = {
[AST_HTTP_GET] = ast_ari_recordings_get_stored_file_cb,
},
.num_children = 0,
.children = { }
};
/*! \brief REST handler for /api-docs/recordings.{format} */
static struct stasis_rest_handlers recordings_stored_recordingName_copy = {
.path_segment = "copy",
@ -754,8 +822,8 @@ static struct stasis_rest_handlers recordings_stored_recordingName = {
[AST_HTTP_GET] = ast_ari_recordings_get_stored_cb,
[AST_HTTP_DELETE] = ast_ari_recordings_delete_stored_cb,
},
.num_children = 1,
.children = { &recordings_stored_recordingName_copy, }
.num_children = 2,
.children = { &recordings_stored_recordingName_file,&recordings_stored_recordingName_copy, }
};
/*! \brief REST handler for /api-docs/recordings.{format} */
static struct stasis_rest_handlers recordings_stored = {

18
res/stasis_recording/stored.c
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@ -62,6 +62,24 @@ const char *stasis_app_stored_recording_get_file(
return recording->file;
}
const char *stasis_app_stored_recording_get_filename(
struct stasis_app_stored_recording *recording)
{
if (!recording) {
return NULL;
}
return recording->file_with_ext;
}
const char *stasis_app_stored_recording_get_extension(
struct stasis_app_stored_recording *recording)
{
if (!recording) {
return NULL;
}
return recording->format;
}
/*!
* \brief Split a path into directory and file, resolving canonical directory.
*

8
rest-api-templates/ari_resource.h.mustache
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@ -82,11 +82,19 @@ int ast_ari_{{c_name}}_{{c_nickname}}_parse_body(
* {{{notes}}}
{{/notes}}
*
{{#is_binary_response}}
* \param ser TCP/TLS session instance
{{/is_binary_response}}
* \param headers HTTP headers
* \param args Swagger parameters
* \param[out] response HTTP response
*/
{{^is_binary_response}}
void ast_ari_{{c_name}}_{{c_nickname}}(struct ast_variable *headers, struct ast_ari_{{c_name}}_{{c_nickname}}_args *args, struct ast_ari_response *response);
{{/is_binary_response}}
{{#is_binary_response}}
void ast_ari_{{c_name}}_{{c_nickname}}(struct ast_tcptls_session_instance *ser, struct ast_variable *headers, struct ast_ari_{{c_name}}_{{c_nickname}}_args *args, struct ast_ari_response *response);
{{/is_binary_response}}
{{/is_req}}
{{#is_websocket}}

11
rest-api-templates/res_ari_resource.c.mustache
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@ -91,7 +91,12 @@ static void ast_ari_{{c_name}}_{{c_nickname}}_cb(
#endif /* AST_DEVMODE */
{{> param_parsing}}
{{^is_binary_response}}
ast_ari_{{c_name}}_{{c_nickname}}(headers, &args, response);
{{/is_binary_response}}
{{#is_binary_response}}
ast_ari_{{c_name}}_{{c_nickname}}(ser, headers, &args, response);
{{/is_binary_response}}
#if defined(AST_DEVMODE)
code = response->response_code;
@ -114,8 +119,14 @@ static void ast_ari_{{c_name}}_{{c_nickname}}_cb(
ast_ari_validate_{{c_singular_name}}_fn());
{{/is_list}}
{{^is_list}}
{{^is_binary_response}}
is_valid = ast_ari_validate_{{c_name}}(
response->message);
{{/is_binary_response}}
{{#is_binary_response}}
/* No validation on a raw binary response */
is_valid = 1;
{{/is_binary_response}}
{{/is_list}}
{{/response_class}}
} else {

3
rest-api-templates/swagger_model.py
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@ -332,6 +332,7 @@ class SwaggerType(Stringify):
self.is_list = None
self.singular_name = None
self.is_primitive = None
self.is_binary = None
def load(self, type_name, processor, context):
# Some common errors
@ -346,6 +347,7 @@ class SwaggerType(Stringify):
else:
self.singular_name = self.name
self.is_primitive = self.singular_name in SWAGGER_PRIMITIVES
self.is_binary = (self.singular_name == 'binary')
processor.process_type(self, context)
return self
@ -401,6 +403,7 @@ class Operation(Stringify):
self.has_header_parameters = self.header_parameters and True
self.has_parameters = self.has_query_parameters or \
self.has_path_parameters or self.has_header_parameters
self.is_binary_response = self.response_class.is_binary
# Body param is different, since there's at most one
self.body_parameter = [

32
rest-api/api-docs/recordings.json
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@ -69,6 +69,38 @@
}
]
},
{
"path": "/recordings/stored/{recordingName}/file",
"description": "The actual file associated with the stored recording",
"operations": [
{
"httpMethod": "GET",
"summary": "Get the file associated with the stored recording.",
"nickname": "getStoredFile",
"responseClass": "binary",
"parameters": [
{
"name": "recordingName",
"description": "The name of the recording",
"paramType": "path",
"required": true,
"allowMultiple": false,
"dataType": "string"
}
],
"errorResponses": [
{
"code": 403,
"reason": "The recording file could not be opened"
},
{
"code": 404,
"reason": "Recording not found"
}
]
}
]
},
{
"path": "/recordings/stored/{recordingName}/copy",
"description": "Copy an individual recording",

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