/*
This file is part of GNUnet.
Copyright (C) 2012-2015 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet 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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @author Martin Schanzenbach
* @author Philippe Buschmann
* @file namestore/plugin_rest_namestore.c
* @brief GNUnet Namestore REST plugin
*/
#include "platform.h"
#include "gnunet_rest_plugin.h"
#include "gnunet_gns_service.h"
#include "gnunet_namestore_service.h"
#include "gnunet_identity_service.h"
#include "gnunet_rest_lib.h"
#include "gnunet_json_lib.h"
#include "microhttpd.h"
#include
/**
* Namestore Namespace
*/
#define GNUNET_REST_API_NS_NAMESTORE "/namestore"
/**
* Error message Unknown Error
*/
#define GNUNET_REST_NAMESTORE_ERROR_UNKNOWN "Unknown Error"
/**
* Error message No identity found
*/
#define GNUNET_REST_IDENTITY_NOT_FOUND "No identity found"
/**
* Error message No default zone specified
*/
#define GNUNET_REST_NAMESTORE_NO_DEFAULT_ZONE "No default zone specified"
/**
* Error message Failed request
*/
#define GNUNET_REST_NAMESTORE_FAILED "Namestore action failed"
/**
* Error message invalid data
*/
#define GNUNET_REST_NAMESTORE_INVALID_DATA "Data invalid"
/**
* Error message No data
*/
#define GNUNET_REST_NAMESTORE_NO_DATA "No data"
/**
* State while collecting all egos
*/
#define ID_REST_STATE_INIT 0
/**
* Done collecting egos
*/
#define ID_REST_STATE_POST_INIT 1
/**
* The configuration handle
*/
const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* HTTP methods allows for this plugin
*/
static char* allow_methods;
/**
* @brief struct returned by the initialization function of the plugin
*/
struct Plugin
{
const struct GNUNET_CONFIGURATION_Handle *cfg;
};
/**
* The default namestore ego
*/
struct EgoEntry
{
/**
* DLL
*/
struct EgoEntry *next;
/**
* DLL
*/
struct EgoEntry *prev;
/**
* Ego Identifier
*/
char *identifier;
/**
* Public key string
*/
char *keystring;
/**
* The Ego
*/
struct GNUNET_IDENTITY_Ego *ego;
};
/**
* The request handle
*/
struct RequestHandle
{
/**
* Records to store
*/
char *record_name;
/**
* Records to store
*/
struct GNUNET_GNSRECORD_Data *rd;
/**
* NAMESTORE Operation
*/
struct GNUNET_NAMESTORE_QueueEntry *add_qe;
/**
* Response object
*/
json_t *resp_object;
/**
* The processing state
*/
int state;
/**
* Handle to NAMESTORE
*/
struct GNUNET_NAMESTORE_Handle *ns_handle;
/**
* Handle to NAMESTORE it
*/
struct GNUNET_NAMESTORE_ZoneIterator *list_it;
/**
* Private key for the zone
*/
const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_pkey;
/**
* IDENTITY Operation
*/
struct EgoEntry *ego_entry;
/**
* Ego list
*/
struct EgoEntry *ego_head;
/**
* Ego list
*/
struct EgoEntry *ego_tail;
/**
* IDENTITY Operation
*/
struct GNUNET_IDENTITY_Operation *op;
/**
* Handle to Identity service.
*/
struct GNUNET_IDENTITY_Handle *identity_handle;
/**
* Rest connection
*/
struct GNUNET_REST_RequestHandle *rest_handle;
/**
* Desired timeout for the lookup (default is no timeout).
*/
struct GNUNET_TIME_Relative timeout;
/**
* ID of a task associated with the resolution process.
*/
struct GNUNET_SCHEDULER_Task *timeout_task;
/**
* The plugin result processor
*/
GNUNET_REST_ResultProcessor proc;
/**
* The closure of the result processor
*/
void *proc_cls;
/**
* The url
*/
char *url;
/**
* Error response message
*/
char *emsg;
/**
* Response code
*/
int response_code;
};
/**
* Cleanup lookup handle
* @param handle Handle to clean up
*/
static void
cleanup_handle (void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
struct EgoEntry *ego_tmp;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Cleaning up\n");
if (NULL != handle->timeout_task)
{
GNUNET_SCHEDULER_cancel (handle->timeout_task);
handle->timeout_task = NULL;
}
if (NULL != handle->record_name)
GNUNET_free(handle->record_name);
if (NULL != handle->url)
GNUNET_free(handle->url);
if (NULL != handle->emsg)
GNUNET_free(handle->emsg);
if (NULL != handle->rd)
{
if (NULL != handle->rd->data)
GNUNET_free((void*)handle->rd->data);
GNUNET_free(handle->rd);
}
if (NULL != handle->timeout_task)
GNUNET_SCHEDULER_cancel(handle->timeout_task);
if (NULL != handle->list_it)
GNUNET_NAMESTORE_zone_iteration_stop(handle->list_it);
if (NULL != handle->add_qe)
GNUNET_NAMESTORE_cancel(handle->add_qe);
if (NULL != handle->identity_handle)
GNUNET_IDENTITY_disconnect(handle->identity_handle);
if (NULL != handle->ns_handle)
{
GNUNET_NAMESTORE_disconnect(handle->ns_handle);
}
for (ego_entry = handle->ego_head;
NULL != ego_entry;)
{
ego_tmp = ego_entry;
ego_entry = ego_entry->next;
GNUNET_free(ego_tmp->identifier);
GNUNET_free(ego_tmp->keystring);
GNUNET_free(ego_tmp);
}
if(NULL != handle->resp_object)
{
json_decref(handle->resp_object);
}
GNUNET_free (handle);
}
/**
* Task run on errors. Reports an error and cleans up everything.
*
* @param cls the `struct RequestHandle`
*/
static void
do_error (void *cls)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
json_t *json_error = json_object();
char *response;
if (NULL == handle->emsg)
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_ERROR_UNKNOWN);
json_object_set_new(json_error,"error", json_string(handle->emsg));
if (0 == handle->response_code)
handle->response_code = MHD_HTTP_OK;
response = json_dumps (json_error, 0);
resp = GNUNET_REST_create_response (response);
handle->proc (handle->proc_cls, resp, handle->response_code);
json_decref(json_error);
GNUNET_free(response);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Get EgoEntry from list with either a public key or a name
* If public key and name are not NULL, it returns the public key result first
*
* @param handle the RequestHandle
* @param pubkey the public key of an identity (only one can be NULL)
* @param name the name of an identity (only one can be NULL)
* @return EgoEntry or NULL if not found
*/
struct EgoEntry*
get_egoentry_namestore(struct RequestHandle *handle, char *name)
{
struct EgoEntry *ego_entry;
if (NULL != name)
{
for (ego_entry = handle->ego_head;
NULL != ego_entry;
ego_entry = ego_entry->next)
{
if (0 != strcasecmp (name, ego_entry->identifier))
continue;
return ego_entry;
}
}
return NULL;
}
/**
* Does internal server error when iteration failed.
*
* @param cls the `struct RequestHandle`
*/
static void
namestore_iteration_error (void *cls)
{
struct RequestHandle *handle = cls;
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
/**
* Create finished callback
*
* @param cls the `struct RequestHandle`
* @param success the success indicating integer, GNUNET_OK on success
* @param emsg the error message (can be NULL)
*/
static void
create_finished (void *cls, int32_t success, const char *emsg)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
handle->add_qe = NULL;
if (GNUNET_YES != success)
{
if (NULL != emsg)
{
handle->emsg = GNUNET_strdup(emsg);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->emsg = GNUNET_strdup("Error storing records");
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, MHD_HTTP_NO_CONTENT);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Delete finished callback
*
* @param cls the `struct RequestHandle`
* @param success the success indicating integer, GNUNET_OK on success
* @param emsg the error message (can be NULL)
*/
static void
del_finished (void *cls, int32_t success, const char *emsg)
{
struct RequestHandle *handle = cls;
handle->add_qe = NULL;
if (GNUNET_NO == success)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup("No record found");
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
if (GNUNET_SYSERR == success)
{
if (NULL != emsg)
{
handle->emsg = GNUNET_strdup(emsg);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->emsg = GNUNET_strdup("Deleting record failed");
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->proc (handle->proc_cls,
GNUNET_REST_create_response (NULL),
MHD_HTTP_NO_CONTENT);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Iteration over all results finished, build final
* response.
*
* @param cls the `struct RequestHandle`
*/
static void
namestore_list_finished (void *cls)
{
struct RequestHandle *handle = cls;
char *result_str;
struct MHD_Response *resp;
handle->list_it = NULL;
if (NULL == handle->resp_object)
handle->resp_object = json_array();
result_str = json_dumps (handle->resp_object, 0);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Result %s\n", result_str);
resp = GNUNET_REST_create_response (result_str);
handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
GNUNET_free_non_null (result_str);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Create a response with requested records
*
* @param handle the RequestHandle
*/
static void
namestore_list_iteration (void *cls,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
const char *rname,
unsigned int rd_len,
const struct GNUNET_GNSRECORD_Data *rd)
{
struct RequestHandle *handle = cls;
json_t *record_obj;
if (NULL == handle->resp_object)
handle->resp_object = json_array();
for (unsigned int i = 0; i < rd_len; i++)
{
if ( (GNUNET_GNSRECORD_TYPE_NICK == rd[i].record_type) &&
(0 != strcmp (rname, GNUNET_GNS_EMPTY_LABEL_AT)) )
continue;
record_obj = GNUNET_JSON_from_gns_record(rname,rd);
if(NULL == record_obj)
continue;
json_array_append (handle->resp_object, record_obj);
json_decref (record_obj);
}
GNUNET_NAMESTORE_zone_iterator_next (handle->list_it, 1);
}
/**
* @param cls closure
* @param ego ego handle
* @param ctx context for application to store data for this ego
* (during the lifetime of this process, initially NULL)
* @param identifier identifier assigned by the user for this ego,
* NULL if the user just deleted the ego and it
* must thus no longer be used
*/
static void
default_ego_get (void *cls,
struct GNUNET_IDENTITY_Ego *ego,
void **ctx,
const char *identifier)
{
struct RequestHandle *handle = cls;
handle->op = NULL;
if (ego == NULL)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_NO_DEFAULT_ZONE);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key (ego);
handle->list_it = GNUNET_NAMESTORE_zone_iteration_start (handle->ns_handle,
handle->zone_pkey,
&namestore_iteration_error,
handle,
&namestore_list_iteration,
handle,
&namestore_list_finished,
handle);
if (NULL == handle->list_it)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
/**
* Handle namestore GET request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
namestore_get (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
char *egoname;
egoname = NULL;
ego_entry = NULL;
//set zone to name if given
if (strlen (GNUNET_REST_API_NS_NAMESTORE) < strlen (handle->url))
{
egoname = &handle->url[strlen (GNUNET_REST_API_NS_NAMESTORE)+1];
ego_entry = get_egoentry_namestore(handle, egoname);
if (NULL == ego_entry)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
if ( NULL != ego_entry )
{
handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key(ego_entry->ego);
}
if (NULL == handle->zone_pkey)
{
handle->op = GNUNET_IDENTITY_get (handle->identity_handle,
"namestore",
&default_ego_get,
handle);
return;
}
handle->list_it = GNUNET_NAMESTORE_zone_iteration_start (handle->ns_handle,
handle->zone_pkey,
&namestore_iteration_error,
handle,
&namestore_list_iteration,
handle,
&namestore_list_finished,
handle);
if (NULL == handle->list_it)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
/**
* @param cls closure
* @param ego ego handle
* @param ctx context for application to store data for this ego
* (during the lifetime of this process, initially NULL)
* @param identifier identifier assigned by the user for this ego,
* NULL if the user just deleted the ego and it
* must thus no longer be used
*/
static void
default_ego_post (void *cls,
struct GNUNET_IDENTITY_Ego *ego,
void **ctx,
const char *identifier)
{
struct RequestHandle *handle = cls;
handle->op = NULL;
if (ego == NULL)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_NO_DEFAULT_ZONE);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key (ego);
handle->add_qe = GNUNET_NAMESTORE_records_store (handle->ns_handle,
handle->zone_pkey,
handle->record_name,
1,
handle->rd,
&create_finished,
handle);
if (NULL == handle->add_qe)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
/**
* Handle namestore POST request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
namestore_add (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct GNUNET_GNSRECORD_Data *gns_record;
struct EgoEntry *ego_entry;
char *egoname;
json_t *data_js;
json_t *name_json;
json_error_t err;
char term_data[handle->rest_handle->data_size + 1];
struct GNUNET_JSON_Specification gnsspec[] = {
GNUNET_JSON_spec_gnsrecord_data(&gns_record),
GNUNET_JSON_spec_end ()
};
if (0 >= handle->rest_handle->data_size)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_NO_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
term_data[handle->rest_handle->data_size] = '\0';
GNUNET_memcpy(term_data, handle->rest_handle->data,
handle->rest_handle->data_size);
data_js = json_loads (term_data, JSON_DECODE_ANY, &err);
if (GNUNET_OK != GNUNET_JSON_parse (data_js, gnsspec, NULL, NULL))
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_INVALID_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
GNUNET_JSON_parse_free(gnsspec);
json_decref (data_js);
return;
}
handle->rd = gns_record;
name_json = json_object_get(data_js, "record_name");
if (!json_is_string(name_json))
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_INVALID_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
handle->record_name = GNUNET_strdup(json_string_value(name_json));
if(NULL == handle->record_name)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_INVALID_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
if (0 >= strlen(handle->record_name))
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_INVALID_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
json_decref (data_js);
egoname = NULL;
ego_entry = NULL;
//set zone to name if given
if (strlen (GNUNET_REST_API_NS_NAMESTORE) < strlen (handle->url))
{
egoname = &handle->url[strlen (GNUNET_REST_API_NS_NAMESTORE)+1];
ego_entry = get_egoentry_namestore(handle, egoname);
if (NULL == ego_entry)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
if (NULL != ego_entry)
{
handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key(ego_entry->ego);
}
if (NULL == handle->zone_pkey)
{
handle->op = GNUNET_IDENTITY_get (handle->identity_handle,
"namestore",
&default_ego_post,
handle);
return;
}
handle->add_qe = GNUNET_NAMESTORE_records_store (handle->ns_handle,
handle->zone_pkey,
handle->record_name,
1,
handle->rd,
&create_finished,
handle);
if (NULL == handle->add_qe)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
/**
* @param cls closure
* @param ego ego handle
* @param ctx context for application to store data for this ego
* (during the lifetime of this process, initially NULL)
* @param identifier identifier assigned by the user for this ego,
* NULL if the user just deleted the ego and it
* must thus no longer be used
*/
static void
default_ego_delete (void *cls,
struct GNUNET_IDENTITY_Ego *ego,
void **ctx,
const char *identifier)
{
struct RequestHandle *handle = cls;
handle->op = NULL;
if (ego == NULL)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_NO_DEFAULT_ZONE);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key (ego);
handle->add_qe = GNUNET_NAMESTORE_records_store (handle->ns_handle,
handle->zone_pkey,
handle->record_name,
0,
NULL,
&del_finished,
handle);
if (NULL == handle->add_qe)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
/**
* Handle namestore DELETE request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
namestore_delete (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct GNUNET_HashCode key;
struct EgoEntry *ego_entry;
char *egoname;
egoname = NULL;
ego_entry = NULL;
//set zone to name if given
if (strlen (GNUNET_REST_API_NS_NAMESTORE) < strlen (handle->url))
{
egoname = &handle->url[strlen (GNUNET_REST_API_NS_NAMESTORE)+1];
ego_entry = get_egoentry_namestore(handle, egoname);
if (NULL == ego_entry)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
if ( NULL != ego_entry )
{
handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key(ego_entry->ego);
}
GNUNET_CRYPTO_hash ("record_name", strlen ("record_name"), &key);
if ( GNUNET_NO
== GNUNET_CONTAINER_multihashmap_contains (con_handle->url_param_map,
&key))
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_INVALID_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->record_name = GNUNET_strdup(
GNUNET_CONTAINER_multihashmap_get (con_handle->url_param_map, &key));
if (NULL == handle->zone_pkey)
{
handle->op = GNUNET_IDENTITY_get (handle->identity_handle,
"namestore",
&default_ego_delete,
handle);
return;
}
handle->add_qe = GNUNET_NAMESTORE_records_store (handle->ns_handle,
handle->zone_pkey,
handle->record_name,
0,
NULL,
&del_finished,
handle);
if (NULL == handle->add_qe)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
/**
* Respond to OPTIONS request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
static void
options_cont (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct MHD_Response *resp;
struct RequestHandle *handle = cls;
//independent of path return all options
resp = GNUNET_REST_create_response (NULL);
MHD_add_response_header (resp,
"Access-Control-Allow-Methods",
allow_methods);
handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
return;
}
/**
* Handle rest request
*
* @param handle the request handle
*/
static void
init_cont (struct RequestHandle *handle)
{
struct GNUNET_REST_RequestHandlerError err;
static const struct GNUNET_REST_RequestHandler handlers[] = {
{MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_NAMESTORE, &namestore_get},
{MHD_HTTP_METHOD_POST, GNUNET_REST_API_NS_NAMESTORE, &namestore_add},
{MHD_HTTP_METHOD_DELETE, GNUNET_REST_API_NS_NAMESTORE, &namestore_delete},
{MHD_HTTP_METHOD_OPTIONS, GNUNET_REST_API_NS_NAMESTORE, &options_cont},
GNUNET_REST_HANDLER_END
};
if (GNUNET_NO == GNUNET_REST_handle_request (handle->rest_handle,
handlers,
&err,
handle))
{
handle->response_code = err.error_code;
GNUNET_SCHEDULER_add_now (&do_error, handle);
}
}
/**
* This function is initially called for all egos and then again
* whenever a ego's identifier changes or if it is deleted. At the
* end of the initial pass over all egos, the function is once called
* with 'NULL' for 'ego'. That does NOT mean that the callback won't
* be invoked in the future or that there was an error.
*
* When used with 'GNUNET_IDENTITY_create' or 'GNUNET_IDENTITY_get',
* this function is only called ONCE, and 'NULL' being passed in
* 'ego' does indicate an error (i.e. name is taken or no default
* value is known). If 'ego' is non-NULL and if '*ctx'
* is set in those callbacks, the value WILL be passed to a subsequent
* call to the identity callback of 'GNUNET_IDENTITY_connect' (if
* that one was not NULL).
*
* When an identity is renamed, this function is called with the
* (known) ego but the NEW identifier.
*
* When an identity is deleted, this function is called with the
* (known) ego and "NULL" for the 'identifier'. In this case,
* the 'ego' is henceforth invalid (and the 'ctx' should also be
* cleaned up).
*
* @param cls closure
* @param ego ego handle
* @param ctx context for application to store data for this ego
* (during the lifetime of this process, initially NULL)
* @param name identifier assigned by the user for this ego,
* NULL if the user just deleted the ego and it
* must thus no longer be used
*/
static void
id_connect_cb (void *cls,
struct GNUNET_IDENTITY_Ego *ego,
void **ctx,
const char *name)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
struct GNUNET_CRYPTO_EcdsaPublicKey pk;
if ((NULL == ego) && (ID_REST_STATE_INIT == handle->state))
{
handle->state = ID_REST_STATE_POST_INIT;
init_cont(handle);
return;
}
if (ID_REST_STATE_INIT == handle->state)
{
ego_entry = GNUNET_new(struct EgoEntry);
GNUNET_IDENTITY_ego_get_public_key (ego, &pk);
ego_entry->keystring = GNUNET_CRYPTO_ecdsa_public_key_to_string (&pk);
ego_entry->ego = ego;
GNUNET_asprintf (&ego_entry->identifier, "%s", name);
GNUNET_CONTAINER_DLL_insert_tail(handle->ego_head, handle->ego_tail,
ego_entry);
}
}
/**
* Function processing the REST call
*
* @param method HTTP method
* @param url URL of the HTTP request
* @param data body of the HTTP request (optional)
* @param data_size length of the body
* @param proc callback function for the result
* @param proc_cls closure for callback function
* @return GNUNET_OK if request accepted
*/
static void
rest_process_request(struct GNUNET_REST_RequestHandle *rest_handle,
GNUNET_REST_ResultProcessor proc,
void *proc_cls)
{
struct RequestHandle *handle = GNUNET_new (struct RequestHandle);
handle->response_code = 0;
handle->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
handle->proc_cls = proc_cls;
handle->proc = proc;
handle->rest_handle = rest_handle;
handle->zone_pkey = NULL;
handle->url = GNUNET_strdup (rest_handle->url);
if (handle->url[strlen (handle->url)-1] == '/')
handle->url[strlen (handle->url)-1] = '\0';
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connecting...\n");
handle->ns_handle = GNUNET_NAMESTORE_connect (cfg);
handle->identity_handle = GNUNET_IDENTITY_connect (cfg, &id_connect_cb, handle);
handle->timeout_task =
GNUNET_SCHEDULER_add_delayed (handle->timeout,
&do_error,
handle);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connected\n");
}
/**
* Entry point for the plugin.
*
* @param cls Config info
* @return NULL on error, otherwise the plugin context
*/
void *
libgnunet_plugin_rest_namestore_init (void *cls)
{
static struct Plugin plugin;
struct GNUNET_REST_Plugin *api;
cfg = cls;
if (NULL != plugin.cfg)
return NULL; /* can only initialize once! */
memset (&plugin, 0, sizeof (struct Plugin));
plugin.cfg = cfg;
api = GNUNET_new (struct GNUNET_REST_Plugin);
api->cls = &plugin;
api->name = GNUNET_REST_API_NS_NAMESTORE;
api->process_request = &rest_process_request;
GNUNET_asprintf (&allow_methods,
"%s, %s, %s, %s, %s",
MHD_HTTP_METHOD_GET,
MHD_HTTP_METHOD_POST,
MHD_HTTP_METHOD_PUT,
MHD_HTTP_METHOD_DELETE,
MHD_HTTP_METHOD_OPTIONS);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
_("Namestore REST API initialized\n"));
return api;
}
/**
* Exit point from the plugin.
*
* @param cls the plugin context (as returned by "init")
* @return always NULL
*/
void *
libgnunet_plugin_rest_namestore_done (void *cls)
{
struct GNUNET_REST_Plugin *api = cls;
struct Plugin *plugin = api->cls;
plugin->cfg = NULL;
GNUNET_free_non_null (allow_methods);
GNUNET_free (api);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Namestore REST plugin is finished\n");
return NULL;
}
/* end of plugin_rest_namestore.c */