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rest.c
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rest.c
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/**
* @file rest.c
*
* Copyright 2018, Allied Telesis Labs New Zealand, Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "internal.h"
/* From libapteryx */
extern bool add_callback (const char *type, const char *path, void *fn, bool value,
void *data, uint32_t flags, guint timeout_ms);
extern bool delete_callback (const char *type, const char *path, void *fn, void *data);
#include <jansson.h>
#define HTTP_CODE_OK 200
#define HTTP_CODE_CREATED 201
#define HTTP_CODE_NO_CONTENT 204
#define HTTP_CODE_NOT_MODIFIED 304
#define HTTP_CODE_BAD_REQUEST 400
#define HTTP_CODE_FORBIDDEN 403
#define HTTP_CODE_NOT_FOUND 404
#define HTTP_CODE_NOT_SUPPORTED 405
#define HTTP_CODE_CONFLICT 409
#define HTTP_CODE_PRECONDITION_FAILED 412
#define HTTP_CODE_INTERNAL_SERVER_ERROR 500
typedef enum
{
REST_E_TAG_NONE,
REST_E_TAG_IN_USE,
REST_E_TAG_INVALID_VALUE,
REST_E_TAG_REQ_TOO_BIG,
REST_E_TAG_RESP_TOO_BIG,
REST_E_TAG_MISING_ATTRIB,
REST_E_TAG_BAD_ATTRIB,
REST_E_TAG_UNKNOWN_ATTRIB,
REST_E_TAG_BAD_ELEMENT,
REST_E_TAG_UNKNOWN_ELEMENT,
REST_E_TAG_UNKNOWN_NS,
REST_E_TAG_ACCESS_DENIED,
REST_E_TAG_LOCK_DENIED,
REST_E_TAG_RESOURCE_DENIED,
REST_E_TAG_ROLLBACK_FAILED,
REST_E_TAG_DATA_EXISTS,
REST_E_TAG_DATA_MISSING,
REST_E_TAG_OPER_NOT_SUPPORTED,
REST_E_TAG_OPER_FAILED,
REST_E_TAG_PARTIAL_OPER,
REST_E_TAG_MALFORMED,
REST_E_TAG_MAX,
} rest_e_tag;
typedef struct _log_params
{
const char *remote_user;
const char *remote_addr;
char *key;
int rc;
} log_params;
const char *error_tags[REST_E_TAG_MAX] = {
"",
"in-use",
"invalid-value",
"(request) too-big",
"(response) too-big",
"missing-attribute",
"bad-attribute",
"unknown-attribute",
"bad-element",
"unknown-element",
"unknown-namespace",
"access-denied",
"lock-denied",
"resource-denied",
"rollback-failed",
"data-exists",
"data-missing",
"operation-not-supported",
"operation-failed",
"partial-operation",
"malformed-message"
};
static sch_instance *g_schema = NULL;
static time_t g_boottime = 0;
static char *
restconf_error (int status, rest_e_tag error_tag)
{
json_t *json = json_object();
json_t *errors = json_object();
json_t *array = json_array ();
json_t *error = json_object();
char *output;
if (status == HTTP_CODE_FORBIDDEN)
{
json_object_set_new (error, "error-type", json_string ("protocol"));
}
else if (status == HTTP_CODE_NOT_FOUND)
{
json_object_set_new (error, "error-type", json_string ("application"));
json_object_set_new (error, "error-message", json_string ("uri path not found"));
}
else if (status == HTTP_CODE_NOT_SUPPORTED)
{
json_object_set_new (error, "error-type", json_string ("application"));
json_object_set_new (error, "error-message", json_string ("requested operation is not supported"));
}
else if (status == HTTP_CODE_CONFLICT)
{
json_object_set_new (error, "error-type", json_string ("application"));
json_object_set_new (error, "error-message", json_string ("object already exists"));
}
else if (status == HTTP_CODE_PRECONDITION_FAILED)
{
json_object_set_new (error, "error-type", json_string ("application"));
json_object_set_new (error, "error-message", json_string ("object modified"));
}
else
{
json_object_set_new (error, "error-type", json_string ("application"));
if (error_tag == REST_E_TAG_INVALID_VALUE)
json_object_set_new (error, "error-message", json_string ("Invalid input parameter"));
else
json_object_set_new (error, "error-message", json_string ("malformed request syntax"));
}
if (error_tag != REST_E_TAG_NONE)
{
json_object_set_new (error, "error-tag", json_string (error_tags[error_tag]));
}
json_array_append_new (array, error);
json_object_set_new (errors, "error", array);
json_object_set_new (json, "ietf-restconf:errors", errors);
output = json_dumps (json, 0);
json_decref (json);
return output;
}
static void
log_get_head (int flags, const char *path, const char *remote_user,
const char *remote_addr, int rc)
{
if ((flags & FLAGS_METHOD_GET) && (logging & LOG_GET))
{
NOTICE ("GET [%3d] %s@%s %s\n", rc, remote_user, remote_addr, path);
}
else if ((flags & FLAGS_METHOD_HEAD) && (logging & LOG_HEAD))
{
NOTICE ("HEAD [%3d] %s@%s %s\n", rc, remote_user, remote_addr, path);
}
}
static void
log_long_value (char *ptr, int len)
{
bool chunk = false;
char temp;
GString *chunk_str;
while (len)
{
if (len < LOG_CHUNK + LOG_FLEX)
chunk = false;
else
{
temp = ptr[LOG_CHUNK];
ptr[LOG_CHUNK] = '\0';
chunk = true;
}
chunk_str = g_string_new (ptr);
g_string_replace (chunk_str, "\n", "\\n", 0);
NOTICE ("%s\n", chunk_str->str);
g_string_free (chunk_str, TRUE);
if (chunk)
{
ptr[LOG_CHUNK] = temp;
ptr += LOG_CHUNK;
len -= LOG_CHUNK;
}
else
break;
}
}
static gboolean
log_modified_leafs (GNode *node, gpointer arg)
{
log_params *params = (log_params *) arg;
char *path = NULL;
char *value = NULL;
char *ptr;
char temp;
int len = 0;
bool chunk = false;
GString *value_str;
path = apteryx_node_path (node);
value = strrchr (path, '/');
if (value)
{
*value = '\0';
value++;
}
if (!value || strlen (value) == 0)
{
value = "";
}
len = strlen (value);
/* LOG_FLEX is used to stop a remaining log message having only a few characters */
if (len > LOG_CHUNK + LOG_FLEX)
{
temp = value[LOG_CHUNK];
value[LOG_CHUNK] = '\0';
chunk = true;
}
value_str = g_string_new (value);
g_string_replace (value_str, "\n", "\\n", 0);
NOTICE ("%s[%3d] %s@%s %s=%s\n",
params->key, params->rc, params->remote_user, params->remote_addr, path, value_str->str);
g_string_free (value_str, TRUE);
if (chunk)
{
/* The value is a long string, break it up into chunks */
value[LOG_CHUNK] = temp;
ptr = &value[LOG_CHUNK];
len -= LOG_CHUNK;
log_long_value (ptr, len);
}
g_free (path);
return FALSE;
}
static gboolean
log_deleted_leafs (GNode *node, gpointer arg)
{
log_params *params = (log_params *) arg;
char *path = NULL;
if (!node->data || strlen (node->data) == 0)
node = node->parent;
if (node)
{
path = apteryx_node_path (node);
if (node->data)
NOTICE ("%s[%3d] %s@%s %s\n",
params->key, params->rc, params->remote_user, params->remote_addr, path);
}
g_free (path);
return FALSE;
}
static void
log_post_put_patch (int flags, const char *path, GNode *root, const char *remote_user,
const char *remote_addr, int rc)
{
char *key = NULL;
if ((flags & FLAGS_METHOD_POST) && (logging & LOG_POST))
key = "POST ";
else if ((flags & FLAGS_METHOD_PUT) && (logging & LOG_PUT))
key = "PUT ";
else if ((flags & FLAGS_METHOD_PATCH) && (logging & LOG_PATCH))
key = "PATCH ";
if (key)
{
log_params params;
params.remote_user = remote_user;
params.remote_addr = remote_addr;
params.key = key;
params.rc = rc;
if (root)
g_node_traverse (root, G_IN_ORDER, G_TRAVERSE_LEAVES, -1, log_modified_leafs,
(gpointer) ¶ms);
else
NOTICE ("%s[%3d] %s@%s %s\n",
key, rc, remote_user, remote_addr, path);
}
}
static void
log_delete (int flags, const char *path, GNode *tree, const char *remote_user,
const char *remote_addr, int rc)
{
char *key = NULL;
if ((flags & FLAGS_METHOD_DELETE) && (logging & LOG_DELETE))
{
log_params params;
key = "DELETE";
params.remote_user = remote_user;
params.remote_addr = remote_addr;
params.key = key;
params.rc = rc;
if (tree)
g_node_traverse (tree, G_IN_ORDER, G_TRAVERSE_LEAVES, -1, log_deleted_leafs,
(gpointer) ¶ms);
else
NOTICE ("%s[%3d] %s@%s %s\n",
key, rc, remote_user, remote_addr, path);
}
}
static void
rest_api_xml (req_handle handle)
{
char *xmlbuf = sch_dump_xml (g_schema);
char *resp = g_strdup_printf ("Status: 200\r\n"
"Content-Type: text/xml\r\n"
"Content-Length: %ld\r\n\r\n",
strlen (xmlbuf));
VERBOSE ("RESP:\n%s\n", resp);
send_response (handle, resp, false);
free (resp);
send_response (handle, xmlbuf, true);
free (xmlbuf);
return;
}
extern char api_html[];
static void
rest_api_html (req_handle handle)
{
char *resp = g_strdup_printf ("Status: 200\r\n"
"Content-Type: text/html\r\n"
"Content-Length: %ld\r\n\r\n",
strlen (api_html));
VERBOSE ("RESP:\n%s\n", resp);
send_response (handle, resp, false);
free (resp);
send_response (handle, api_html, true);
return;
}
sch_node *
rest_rpc_schema (sch_node *schema)
{
sch_node *_schema;
/* Executable nodes are RPC's */
if (sch_is_executable (schema))
return schema;
/* Special case to support a container that also has an RPC with the same name */
if (sch_is_list (schema))
_schema = sch_node_child (sch_node_child_first (schema), "_");
else
_schema = sch_node_child (schema, "_");
if (_schema && sch_is_executable (_schema))
return _schema;
/* Not an RPC */
return NULL;
}
static char *
rest_rpc (int flags, GNode *node, sch_node *schema, json_t *json)
{
char *path = apteryx_node_path (node);
int schflags = 0;
GNode *input = NULL;
GNode *output = NULL;
rest_e_tag error_tag = REST_E_TAG_NONE;
char *error_string = NULL;
char *data = NULL;
char *resp;
rest_rpc_error error;
int rc;
/* Special case: We consider /operations to be a root node and hence
support non-native namespaces at this node. This allows us to have
multiple data models with the same root rpc. */
if (g_ascii_strncasecmp (path, "/operations", strlen("/operations")) == 0)
{
sch_ns *ns = sch_node_ns (schema);
if (ns && !sch_ns_native (g_schema, ns))
{
const char *prefix = sch_ns_prefix (g_schema, ns);
const char *name = APTERYX_NAME (node);
char *_path = g_strdup_printf ("/operations/%s:%s", prefix, name);
free (path);
path = _path;
}
}
/* Set formating flags for input/output */
if (verbose)
schflags |= SCH_F_DEBUG;
if (flags & FLAGS_JSON_FORMAT_ARRAYS)
schflags |= SCH_F_JSON_ARRAYS;
if (flags & FLAGS_JSON_FORMAT_TYPES)
schflags |= SCH_F_JSON_TYPES;
if (flags & FLAGS_JSON_FORMAT_NS)
schflags |= (SCH_F_NS_MODEL_NAME|SCH_F_NS_PREFIX);
if (flags & FLAGS_CONDITIONS)
schflags |= SCH_F_CONDITIONS;
if (json)
{
/* RESTCONF mandates "input" (or nothing) be the primary data object
for rpc requests. In non-restconf mode we are more relaxed but to match
the data model we need to provide that top level "input" node */
if (!(flags & FLAGS_RESTCONF) && json_object_size (json))
{
const char *key = NULL;
if (json_object_size (json) == 1)
{
key = json_object_iter_key (json_object_iter(json));
char *colon = key ? strchr (key, ':') : NULL;
if (colon) key = colon + 1;
if (g_strcmp0 (key, "input") != 0)
key = NULL;
}
if (key == NULL)
{
json_t *obj = json_object ();
json_object_set_new (obj, "input", json);
json = obj;
}
}
/* Parse the input - always set types */
input = sch_json_to_gnode (g_schema, schema, json, schflags | SCH_F_JSON_TYPES);
json_decref (json);
/* Check parsing succeeded and we have input when required */
if (!input)
{
switch (sch_last_err ())
{
case SCH_E_NOSCHEMANODE:
rc = HTTP_CODE_NOT_FOUND;
error_tag = REST_E_TAG_INVALID_VALUE;
break;
case SCH_E_NOTREADABLE:
case SCH_E_NOTWRITABLE:
rc = HTTP_CODE_FORBIDDEN;
error_tag = REST_E_TAG_ACCESS_DENIED;
break;
default:
rc = HTTP_CODE_BAD_REQUEST;
error_tag = REST_E_TAG_INVALID_VALUE;
break;
}
goto exit;
}
}
error = rest_rpc_execute (flags, path, input, &output, &error_string);
switch (error)
{
case REST_RPC_E_NONE:
if (output)
rc = HTTP_CODE_OK;
else
rc = HTTP_CODE_NO_CONTENT;
break;
case REST_RPC_E_FAIL:
rc = HTTP_CODE_BAD_REQUEST;
error_tag = REST_E_TAG_OPER_FAILED;
break;
case REST_RPC_E_NOT_FOUND:
rc = HTTP_CODE_NOT_SUPPORTED;
error_tag = REST_E_TAG_OPER_NOT_SUPPORTED;
break;
case REST_RPC_E_INTERNAL:
rc = HTTP_CODE_INTERNAL_SERVER_ERROR;
error_tag = REST_E_TAG_OPER_FAILED;
break;
default:
rc = HTTP_CODE_BAD_REQUEST;
error_tag = REST_E_TAG_INVALID_VALUE;
break;
}
if (output)
{
/* Get schema output node */
schema = sch_node_child (schema, "output");
if (schema)
{
/* Convert the data to json from the expected path offset */
json_t *json = sch_gnode_to_json (g_schema, schema, output, schflags);
if (json && !(flags & FLAGS_RESTCONF))
{
/* Chop off the output node */
json_t *json_new = json_object_iter_value (json_object_iter (json));
json_incref (json_new);
json_decref (json);
json = json_new;
/* If there is only one value in the output and we have been asked to
strip root elements then remove the key and return the value only */
if (!(flags & FLAGS_JSON_FORMAT_ROOT) && json_object_size (json) == 1)
{
/* Chop off the root node */
json_t *json_new = json_object_iter_value (json_object_iter (json));
json_incref (json_new);
json_decref (json);
json = json_new;
}
}
if (!json || (data = json_dumps (json, JSON_ENCODE_ANY)) == NULL)
{
ERROR ("REST: Failed to convert rpc output to json\n");
rc = HTTP_CODE_INTERNAL_SERVER_ERROR;
}
apteryx_free_tree (output);
if (json)
json_decref (json);
}
else
{
ERROR ("REST: no output node in schema\n");
rc = HTTP_CODE_INTERNAL_SERVER_ERROR;
}
}
exit:
if (!data && rc >= 400 && rc <= 500)
{
if (flags & FLAGS_RESTCONF)
{
json_t *json = json_object();
json_t *errors = json_object();
json_t *array = json_array ();
json_t *error = json_object();
json_object_set_new (error, "error-type", json_string ("application"));
if (error_tag != REST_E_TAG_NONE)
json_object_set_new (error, "error-tag", json_string (error_tags[error_tag]));
if (error_string)
json_object_set_new (error, "error-message", json_string (error_string));
json_array_append_new (array, error);
json_object_set_new (errors, "error", array);
json_object_set_new (json, "ietf-restconf:errors", errors);
data = json_dumps (json, 0);
json_decref (json);
}
else if (error_string)
{
json_t *json = json_object();
json_object_set_new (json, "message", json_string (error_string));
data = json_dumps (json, 0);
json_decref (json);
}
}
resp = g_strdup_printf ("Status: %d\r\n"
"Content-Type: %s\r\n"
"Content-Length: %ld\r\n"
"\r\n" "%s", rc,
flags & FLAGS_RESTCONF ? "application/yang-data+json" : "application/json",
data ? strlen (data) : 0,
data ? : "");
free (data);
free (error_string);
apteryx_free_tree (input);
free (path);
return resp;
}
static int
apteryx_json_search (const char *path, char **data)
{
sch_node *root, *node;
char *_path;
int len;
GList *children, *iter;
bool first = true;
char *buffer;
/* Create a version of the path without the trailing '/' */
_path = strdup (path);
len = strlen (path);
_path[len - 1] = '\0';
/* Validate starting path */
if ((root = sch_lookup (g_schema, _path)) == NULL)
{
free (_path);
return HTTP_CODE_NOT_FOUND;
}
if (!sch_is_readable (root))
{
free (_path);
return HTTP_CODE_FORBIDDEN;
}
/* Do the Apteryx search */
*data = g_strdup_printf ("{\"%s\": [", len > 2 ? strrchr (_path, '/') + 1 : "");
children = apteryx_search (path);
children = g_list_sort (children, (GCompareFunc) strcasecmp);
for (iter = children; iter; iter = g_list_next (iter))
{
path = strrchr ((const char *) iter->data, '/') + 1;
if ((node = sch_node_child (root, path)) != NULL && sch_is_readable (node))
{
buffer = *data;
*data = g_strdup_printf ("%s%s\"%s\"", buffer, first ? "" : ",", path);
free (buffer);
first = false;
}
}
buffer = *data;
*data = g_strdup_printf ("%s]}", buffer);
free (buffer);
g_list_free_full (children, free);
free (_path);
return HTTP_CODE_OK;
}
static char *
rest_api_search (int flags, const char *path, const char *if_none_match, const char *if_modified_since,
const char *remote_user, const char *remote_addr)
{
char *_path;
char *data = NULL;
uint64_t ts = 0;
char *resp;
int rc;
_path = strdup (path);
_path[strlen (path) - 1] = '\0';
ts = apteryx_timestamp (_path);
g_free (_path);
if (if_none_match && if_none_match[0] != '\0' &&
ts == strtoull (if_none_match, NULL, 16))
{
rc = HTTP_CODE_NOT_MODIFIED;
goto exit;
}
rc = apteryx_json_search (path, &data);
exit:
if (logging)
log_get_head (FLAGS_METHOD_GET, path, remote_user, remote_addr, rc);
resp = g_strdup_printf ("Status: %d\r\n"
"Etag: %" PRIX64 "\r\n"
"Content-Type: application/json\r\n"
"Content-Length: %ld\r\n"
"\r\n" "%s", rc, ts,
data ? strlen (data) : 0,
data ? : "");
free (data);
return resp;
}
static GNode*
get_response_node (GNode *tree, int rdepth)
{
GNode *rnode = tree;
while (--rdepth && rnode)
rnode = rnode->children;
return rnode;
}
static char *
rest_api_get (int flags, const char *path, const char *if_none_match, const char *if_modified_since,
const char *remote_user, const char *remote_addr)
{
const char *qmark;
char *rpath = NULL;
sch_node *qschema = NULL;
char *apath = NULL;
json_t *json = NULL;
uint64_t ts = 0;
int rc = HTTP_CODE_OK;
rest_e_tag error_tag = REST_E_TAG_NONE;
GNode *query, *tree;
char *json_string = NULL;
char *resp = NULL;
int schflags = 0;
int qdepth, rdepth;
int param_depth = 0;
int diff;
/* If a request is made to /restconf/data (in which case the path is now empty) it is analogous to a
request to /restconf/data/ietf-yang-library:yang-library */
if (!strlen (path) && (flags & FLAGS_RESTCONF))
path = "/ietf-yang-library:yang-library";
/* Separate the path from any query string */
qmark = strchr (path, '?');
if (qmark)
{
path = (const char *) (rpath = strndup (path, rpath - path));
qmark += 1;
}
/* Parsing options */
if (verbose)
schflags |= SCH_F_DEBUG;
if (flags & FLAGS_JSON_FORMAT_ARRAYS)
schflags |= SCH_F_JSON_ARRAYS;
if (flags & FLAGS_JSON_FORMAT_TYPES)
schflags |= SCH_F_JSON_TYPES;
if (flags & FLAGS_CONDITIONS)
schflags |= SCH_F_CONDITIONS;
if (flags & FLAGS_IDREF_VALUES)
schflags |= SCH_F_IDREF_VALUES;
if (flags & FLAGS_JSON_FORMAT_NS)
{
schflags |= SCH_F_NS_MODEL_NAME;
/* If the prefix/model name is not specified in the request
then dont include it in the reply */
char *colon = strchr (path, ':');
char *slash = strchr (path, '/');
if (slash)
slash = strchr (slash + 1, '/');
if (colon && (!slash || colon < slash))
schflags |= SCH_F_NS_PREFIX;
}
/* Convert the path to a GNode tree to use as the base of the apteryx query */
query = sch_path_to_gnode (g_schema, NULL, path, schflags, &qschema);
if (!query || !qschema)
{
VERBOSE ("REST: Path \"%s\" invalid\n", path);
switch (sch_last_err ())
{
case SCH_E_NOTREADABLE:
case SCH_E_NOTWRITABLE:
rc = HTTP_CODE_FORBIDDEN;
error_tag = REST_E_TAG_ACCESS_DENIED;
break;
case SCH_E_NOSCHEMANODE:
default:
rc = HTTP_CODE_NOT_FOUND;
error_tag = REST_E_TAG_INVALID_VALUE;
}
goto exit;
}
if (sch_is_leaf (qschema) && !sch_is_readable (qschema))
{
VERBOSE ("REST: Path \"%s\" not readable\n", path);
rc = HTTP_CODE_FORBIDDEN;
error_tag = REST_E_TAG_ACCESS_DENIED;
goto exit;
}
/* Get the depth of the response which is the depth of the query
OR the up until the first path wildcard */
qdepth = g_node_max_height (query);
rdepth = 1;
GNode *rnode = query;
while (rnode &&
g_node_n_children (rnode) == 1 &&
g_strcmp0 (APTERYX_NAME (g_node_first_child (rnode)), "*") != 0)
{
rnode = g_node_first_child (rnode);
rdepth++;
}
sch_node *rschema = qschema;
diff = qdepth - rdepth;
while (diff--)
rschema = sch_node_parent (rschema);
if (sch_node_parent (rschema) && sch_is_list (sch_node_parent (rschema)))
{
/* We need to present the list rather than the key */
rschema = sch_node_parent (rschema);
rdepth--;
}
GNode *qnode = rnode;
while (qnode->children)
qnode = qnode->children;
/* Handle GET RPC's */
sch_node *rpcschema = rest_rpc_schema (qschema);
if (rpcschema)
{
/* Check RPC supports GET */
if (flags & FLAGS_RESTCONF || !sch_is_readable (rpcschema))
{
VERBOSE ("REST: GET RPC not supported for %s\n", path);
error_tag = REST_E_TAG_OPER_NOT_SUPPORTED;
rc = HTTP_CODE_NOT_SUPPORTED;
}
else
{
resp = rest_rpc (flags, qnode, rpcschema, NULL);
}
goto exit;
}
/* Get a timestamp for the root of the query path */
apath = apteryx_node_path (rnode);
ts = apteryx_timestamp (apath);
free (apath);
if (if_none_match && if_none_match[0] != '\0' &&
ts == strtoull (if_none_match, NULL, 16))
{
VERBOSE ("REST: Path \"%s\" not modified since ETag:%s\n", rpath, if_none_match);
resp = g_strdup_printf ("Status: %d\r\n"
"Content-Type: application/json\r\n"
"Content-Length: 0\r\n\r\n",
HTTP_CODE_NOT_MODIFIED);
goto exit;
}
if (if_modified_since && if_modified_since[0] != '\0')
{
struct tm last_modified;
time_t realtime;
strptime (if_modified_since, "%a, %d %b %Y %H:%M:%S GMT", &last_modified);
realtime = timegm (&last_modified);
if ((ts / 1000000) <= (realtime - g_boottime))
{
VERBOSE ("REST: Path \"%s\" not modified since Time:%s\n", rpath, if_modified_since);
rc = HTTP_CODE_NOT_MODIFIED;
resp = g_strdup_printf ("Status: %d\r\n"
"Content-Type: application/json\r\n"
"Content-Length: 0\r\n\r\n",
HTTP_CODE_NOT_MODIFIED);
goto exit;
}
}
/* Parse the query if provided */
if (qmark)
{
/* Parse the query and attach to the tree */
if (!sch_query_to_gnode (g_schema, qschema, qnode, qmark, schflags, &schflags, ¶m_depth))
{
rc = HTTP_CODE_BAD_REQUEST;
error_tag = REST_E_TAG_INVALID_VALUE;
goto exit;
}
}
/* Without a query we may need to add a wildcard to get everything from here down */
if (!query || (qdepth == g_node_max_height (query) && !(schflags & SCH_F_DEPTH_ONE)))
{
if (qschema && sch_node_child_first (qschema) && !(schflags & SCH_F_STRIP_DATA))
{
/* Get everything from here down if we do not already have a star */
if (!g_node_first_child (qnode) && g_strcmp0 (APTERYX_NAME (qnode), "*") != 0)
{
APTERYX_NODE (qnode, g_strdup ("*"));
DEBUG ("%*s%s\n", qdepth * 2, " ", "*");
}
}
}
/* Query the database */
tree = apteryx_query (query);
if (query && (schflags & SCH_F_ADD_DEFAULTS) && rschema)
{
GNode *rnode = get_response_node (tree, rdepth);
sch_add_defaults (g_schema, rschema, &tree, &query, rnode, qnode, rdepth,
qdepth, schflags);
}
if (tree)
{
/* Get rid of any unwanted nodes */
if (schflags & SCH_F_TRIM_DEFAULTS)
{
rnode = get_response_node (tree, rdepth);
sch_traverse_tree (g_schema, rschema, rnode, schflags);
}
if ((schflags & SCH_F_DEPTH) && param_depth)
{
rnode = get_response_node (tree, rdepth);
sch_trim_tree_by_depth (g_schema, rschema, rnode, schflags, param_depth);
}
/* Convert the result to JSON */
rnode = get_response_node (tree, rdepth);
if (rnode)
{
VERBOSE ("JSON:\n");
json = sch_gnode_to_json (g_schema, rschema, rnode, schflags);
}
if (json)
{
if ((!(flags & FLAGS_JSON_FORMAT_ROOT) ||
(!(flags & FLAGS_RESTCONF) && qschema != rschema && sch_is_list (rschema)))
&& !json_is_string (json))
{
/* Chop off the root node */
json_t *json_new = json_object_iter_value (json_object_iter (json));
json_incref (json_new);
json_decref (json);
json = json_new;
}
if (flags & FLAGS_JSON_FORMAT_MULTI)
{
/* Top level array */
json_t *json_new = json_array ();
json_array_append_new (json_new, json);
json = json_new;
}
}
else
{
json = json_object();
}
apteryx_free_tree (tree);
}
else
{
if ((schflags & SCH_F_DEPTH) && qschema && qnode)
json = sch_gnode_to_json (g_schema, qschema, qnode, schflags);
else
json = json_object();
}
json_string = json_dumps (json, JSON_ENCODE_ANY);
exit:
if (logging)
log_get_head (flags, path, remote_user, remote_addr, rc);
if (!resp)
{
if (flags & FLAGS_RESTCONF && rc >= 400 && rc <= 499 && !json_string)
{
json_string = restconf_error (rc, error_tag);
}
char last_modified[128];
time_t realtime = (time_t) (g_boottime + (ts / 1000000));
struct tm *my_tm = gmtime (&realtime);
strftime (last_modified, 128, "%a, %d %b %Y %H:%M:%S GMT", my_tm);
resp = g_strdup_printf ("Status: %d\r\n"
"Last-Modified: %s\r\n"
"ETag: %" PRIX64 "\r\n"
"Content-Type: %s\r\n"
"Content-Length: %ld\r\n"
"\r\n" "%s", rc, last_modified, ts,
flags & FLAGS_RESTCONF ? "application/yang-data+json" : "application/json",
json_string ? strlen (json_string) : 0,
json_string && (flags & FLAGS_METHOD_HEAD) == 0 ? json_string : "");
}
free (json_string);
if (json)
json_decref (json);
apteryx_free_tree (query);
free (rpath);
return resp;
}
static bool
restconf_is_list_key_leaf_update (sch_node *api_subtree, GNode *child, GNode *tnode)
{
sch_node *parent1 = sch_node_parent (api_subtree);
sch_node *parent2 = sch_node_parent (parent1); /* Might need to go up another level */
sch_node *list_parent = NULL;
bool key_update = false;
bool case1 = true;
if (parent1 && sch_is_list (parent1))
{
list_parent = parent1;
}
else if (parent2 && sch_is_list (parent2))
{
list_parent = parent2;
case1 = false;
}
if (list_parent)
{
char *key = sch_list_key (list_parent);
char *list_name = sch_name (list_parent);
if (g_strcmp0 (list_name, APTERYX_NAME (tnode)) == 0)
{
tnode = tnode->children;
}
for (GNode *node = g_node_first_sibling (tnode); node; node = g_node_next_sibling (node))
{
if (g_strcmp0 (key, APTERYX_NAME (node)) == 0 && node->children)
{
char *value = APTERYX_NAME (node->children);
char *path = apteryx_node_path (child);
char *query = case1 ? g_strdup_printf ("%s/%s", path, key) : g_strdup (path);
char *res = apteryx_get (query);
if (res && g_strcmp0 (res, value))
key_update = true;
g_free (res);
g_free (path);
g_free (query);
break;
}