/* ****************************************************************************
*
* tenantCheck -
*/
static std::string tenantCheck(const std::string& tenant)
{
char* name = (char*) tenant.c_str();
if (strlen(name) > MAX_TENANT_NAME_LEN)
{
LM_W(("Bad Input (a tenant name can be max %d characters long. Length: %d)", MAX_TENANT_NAME_LEN, strlen(name)));
return "bad length - a tenant name can be max " MAX_TENANT_NAME_LEN_STRING " characters long";
}
while (*name != 0)
{
if ((!isalnum(*name)) && (*name != '_'))
{
LM_W(("Bad Input (bad character in tenant name - only underscore and alphanumeric characters are allowed. Offending character: %c)", *name));
return "bad character in tenant name - only underscore and alphanumeric characters are allowed";
}
++name;
}
return "OK";
}
/* ****************************************************************************
*
* attribute -
*/
static std::string attribute(std::string path, std::string value, ParseData* reqDataP)
{
LM_T(LmtParse, ("Got an attribute: '%s'", value.c_str()));
if (value == "")
{
reqDataP->errorString = "Empty attribute name";
LM_W(("Empty attribute name"));
}
reqDataP->qcr.res.attributeList.push_back(value);
return "OK";
}
/* ****************************************************************************
*
* UpdateContextRequest::fill -
*/
void UpdateContextRequest::fill
(
const UpdateContextAttributeRequest* ucarP,
const std::string& entityId,
const std::string& entityType,
const std::string& attributeName,
const std::string& metaID,
const std::string& _updateActionType
)
{
ContextElement* ceP = new ContextElement();
ContextAttribute* caP;
if (ucarP->compoundValueP != NULL)
{
caP = new ContextAttribute(attributeName, ucarP->type, ucarP->compoundValueP);
}
else
{
caP = new ContextAttribute(attributeName, ucarP->type, ucarP->contextValue);
}
caP->metadataVector.fill((MetadataVector*) &ucarP->metadataVector);
ceP->contextAttributeVector.push_back(caP);
ceP->entityId.fill(entityId, entityType, "false");
contextElementVector.push_back(ceP);
//
// If there is a metaID, then the metadata named ID must exist.
// If it doesn't exist already, it must be created
//
if (metaID != "")
{
Metadata* mP = caP->metadataVector.lookupByName("ID");
if (mP == NULL)
{
mP = new Metadata("ID", "", metaID);
caP->metadataVector.push_back(mP);
}
else if (mP->value != metaID)
{
LM_W(("Bad Input (metaID differs in URI and payload"));
}
}
updateActionType.set(_updateActionType);
}
/* ****************************************************************************
*
* EntityIdVector::check -
*/
std::string EntityIdVector::check
(
RequestType requestType,
Format format,
const std::string& indent,
const std::string& predetectedError,
int counter
)
{
// Only OK to be empty if part of a ContextRegistration
if ((requestType == DiscoverContextAvailability) ||
(requestType == SubscribeContextAvailability) ||
(requestType == UpdateContextAvailabilitySubscription) ||
(requestType == QueryContext) ||
(requestType == SubscribeContext))
{
if (vec.size() == 0)
{
LM_W(("Bad Input (mandatory entity list missing)"));
return "No entities";
}
}
for (unsigned int ix = 0; ix < vec.size(); ++ix)
{
std::string res;
if ((res = vec[ix]->check(requestType, format, indent, predetectedError, counter)) != "OK")
{
LM_W(("Bad Input (invalid vector of EntityIds)"));
return res;
}
}
return "OK";
}
/* ****************************************************************************
*
* entityIdList -
*/
static int entityIdList(xml_node<>* node, ParseData* parseDataP)
{
LM_T(LmtParse, ("got an entityIdList"));
if (parseDataP->rcr.crP->entityIdVectorPresent == true)
{
parseDataP->errorString = "Got an entityIdList when one was present already";
LM_W(("Bad Input (more than one list of entityId)"));
return 1;
}
parseDataP->rcr.crP->entityIdVectorPresent = true;
return 0;
}
/* ****************************************************************************
*
* treat -
*
* This is the function that actually treats a node, bu calling its treat function
* provided by src/lib/xmlRequest - the entry point of XML parsing.
*
* It simple compares the current path with the paths in the incoming vector 'parseVector'
* and if a hit is found calls the 'treat' function of that hit (the instance of the vector).
*
* If no hit is found it means that the path of the current XML node is unknown.
* This will result in either a 'PARSE ERROR' or thatthe node is part of a Compound.
*/
static bool treat(ConnectionInfo* ciP, xml_node<>* node, const std::string& path, XmlNode* parseVector, ParseData* parseDataP)
{
for (unsigned int ix = 0; parseVector[ix].path != "LAST"; ++ix)
{
if (path == parseVector[ix].path)
{
int r;
//
// Before treating a node, a check is made that the value of the node has no forbidden
// characters.
// However, if the the node has attributes, then the values of the attributes are checked instead
//
if (node->first_attribute() == NULL)
{
if (forbiddenChars(node->value()) == true)
{
LM_E(("Found a forbidden value in '%s'", node->value()));
ciP->httpStatusCode = SccBadRequest;
ciP->answer = std::string("Illegal value for XML attribute");
return true;
}
}
else
{
for (xml_attribute<> *attr = node->first_attribute(); attr; attr = attr->next_attribute())
{
if (forbiddenChars(attr->value()) == true)
{
LM_E(("Found a forbidden value in attribute: '%s'", node->value()));
ciP->httpStatusCode = SccBadRequest;
ciP->answer = std::string("Illegal value for XML attribute");
return true;
}
}
}
if ((r = parseVector[ix].treat(node, parseDataP)) != 0)
{
LM_W(("Bad Input (xml parse error %d)", r));
}
return true; // Node has been treated
}
}
return false; // Node was not found in the parse vector
}
/* ****************************************************************************
*
* duration -
*/
static std::string duration(const std::string& path, const std::string& value, ParseData* reqDataP)
{
std::string s;
LM_T(LmtParse, ("Got a duration: '%s'", value.c_str()));
reqDataP->scar.res.duration.set(value);
if ((s = reqDataP->scar.res.duration.check(SubscribeContextAvailability, JSON, "", "", 0)) != "OK")
{
LM_W(("Bad Input (error parsing duration '%s': %s)", reqDataP->scar.res.duration.get().c_str(), s.c_str()));
return s;
}
return "OK";
}
/* ****************************************************************************
*
* badVerbGetPostDeleteOnly -
*/
std::string badVerbGetPostDeleteOnly
(
ConnectionInfo* ciP,
int components,
std::vector<std::string>& compV,
ParseData* parseDataP
)
{
ciP->httpHeader.push_back("Allow");
ciP->httpHeaderValue.push_back("GET, POST, DELETE");
ciP->httpStatusCode = SccBadVerb;
LM_W(("Bad Input (bad verb for url '%s', method '%s')", ciP->url.c_str(), ciP->method.c_str()));
return "";
}
/* ****************************************************************************
*
* mongoUpdateContext -
*/
HttpStatusCode mongoUpdateContext
(
UpdateContextRequest* requestP,
UpdateContextResponse* responseP,
const std::string& tenant,
const std::vector<std::string>& servicePathV,
std::map<std::string, std::string>& uriParams, // FIXME P7: we need this to implement "restriction-based" filters
const std::string& xauthToken,
const std::string& apiVersion,
bool checkEntityExistance
)
{
bool reqSemTaken;
reqSemTake(__FUNCTION__, "ngsi10 update request", SemWriteOp, &reqSemTaken);
/* Check that the service path vector has only one element, returning error otherwise */
if (servicePathV.size() > 1)
{
LM_W(("Bad Input (service path length %d is greater than the one in update)", servicePathV.size()));
responseP->errorCode.fill(SccBadRequest, "service path length greater than one in update");
}
else
{
/* Process each ContextElement */
for (unsigned int ix = 0; ix < requestP->contextElementVector.size(); ++ix)
{
processContextElement(requestP->contextElementVector.get(ix),
responseP,
requestP->updateActionType.get(),
tenant,
servicePathV,
uriParams,
xauthToken,
apiVersion,
checkEntityExistance);
}
/* Note that although individual processContextElements() invocations return ConnectionError, this
error gets "encapsulated" in the StatusCode of the corresponding ContextElementResponse and we
consider the overall mongoUpdateContext() as OK. */
responseP->errorCode.fill(SccOk);
}
reqSemGive(__FUNCTION__, "ngsi10 update request", reqSemTaken);
return SccOk;
}
/* ****************************************************************************
*
* Notifier::sendNotifyContextAvailabilityRequest -
*
* FIXME: this method is very similar to sendNotifyContextRequest and probably
* they could be refactored in the future to have a common part using a parent
* class for both types of notifications and using it as first argument
*/
void Notifier::sendNotifyContextAvailabilityRequest(NotifyContextAvailabilityRequest* ncar, const std::string& url, const std::string& tenant, Format format) {
/* Render NotifyContextAvailabilityRequest */
std::string payload = ncar->render(NotifyContextAvailability, format, "");
/* Parse URL */
std::string host;
int port;
std::string uriPath;
std::string protocol;
if (!parseUrl(url, host, port, uriPath, protocol))
{
LM_W(("Bad Input (sending NotifyContextAvailabilityRequest: malformed URL: '%s')", url.c_str()));
return;
}
/* Set Content-Type depending on the format */
std::string content_type = (format == XML ? "application/xml" : "application/json");
/* Send the message (no wait for response, in a separated thread to avoid blocking response)*/
#ifdef SEND_BLOCKING
sendHttpSocket(host, port, protocol, "POST", tenant, "", "", uriPath, content_type, payload, true, NOTIFICATION_WAIT_MODE);
#endif
#ifdef SEND_IN_NEW_THREAD
pthread_t tid;
SenderThreadParams* params = new SenderThreadParams();
params->ip = host;
params->port = port;
params->verb = "POST";
params->tenant = tenant;
params->resource = uriPath;
params->content_type = content_type;
params->content = payload;
strncpy(params->transactionId, transactionId, sizeof(params->transactionId));
int ret = pthread_create(&tid, NULL, startSenderThread, params);
if (ret != 0)
{
LM_E(("Runtime Error (error creating thread: %d)", ret));
return;
}
pthread_detach(tid);
#endif
}
/* ****************************************************************************
*
* xmlParse -
*/
void xmlParse(xml_node<>* father, xml_node<>* node, std::string indentation, std::string fatherPath, XmlNode* parseVector, ParseData* reqDataP)
{
if (node == NULL)
return;
if (node->name() == NULL)
return;
if (node->name()[0] == 0)
return;
std::string path = fatherPath + "/" + node->name();
//
// Lookup node in the node vector
//
bool treated = false;
for (unsigned int ix = 0; parseVector[ix].path != "LAST"; ++ix)
{
if (path == parseVector[ix].path)
{
int r;
if ((r = parseVector[ix].treat(node, reqDataP)) != 0)
{
fprintf(stderr, "parse vector treat function error: %d\n", r);
LM_E(("parse vector treat function error: %d", r));
}
treated = true;
break;
}
}
if (treated == false)
LM_W(("Warning: node '%s' not treated (%s)", path.c_str(), node->name()));
xml_node<>* child = node->first_node();
while (child != NULL)
{
xmlParse(node, child, indentation + " ", path, parseVector, reqDataP);
child = child->next_sibling();
}
}
/* ****************************************************************************
*
* entityIdId -
*/
static int entityIdId(xml_node<>* node, ParseData* parseDataP)
{
LM_T(LmtParse, ("Got an entityId:id: '%s'", node->value()));
if (parseDataP->ucas.entityIdP != NULL)
{
parseDataP->ucas.entityIdP->id = node->value();
}
else
{
LM_W(("Bad Input (XML parse error)"));
parseDataP->errorString = "Bad Input (XML parse error)";
return 1;
}
return 0;
}
/* ****************************************************************************
*
* QueryContextResponse::check -
*/
std::string QueryContextResponse::check(ConnectionInfo* ciP, RequestType requestType, const std::string& indent, const std::string& predetectedError, int counter)
{
std::string res;
if (predetectedError != "")
{
errorCode.fill(SccBadRequest, predetectedError);
}
else if ((res = contextElementResponseVector.check(QueryContext, ciP->outFormat, indent, predetectedError, 0)) != "OK")
{
LM_W(("Bad Input (%s)", res.c_str()));
errorCode.fill(SccBadRequest, res);
}
else
return "OK";
return render(ciP, QueryContext, indent);
}
/* ****************************************************************************
*
* AlarmManager::badInputReset -
*
* Returns false if no effective alarm transition occurs, otherwise, true is returned.
*/
bool AlarmManager::badInputReset(const std::string& ip)
{
semTake();
if (badInputV.find(ip) == badInputV.end()) // Doesn't exist
{
semGive();
return false;
}
badInputV.erase(ip);
++badInputResets;
semGive();
LM_W(("Releasing alarm BadInput %s", ip.c_str()));
return true;
}
/* ****************************************************************************
*
* AlarmManager::notificationErrorReset -
*
* Returns false if no effective alarm transition occurs, otherwise, true is returned.
*/
bool AlarmManager::notificationErrorReset(const std::string& url)
{
semTake();
if (notificationV.find(url) == notificationV.end()) // Doesn't exist
{
semGive();
return false;
}
notificationV.erase(url);
++notificationErrorResets;
semGive();
LM_W(("Releasing alarm NotificationError %s", url.c_str()));
return true;
}
/* ****************************************************************************
*
* xmlRequestGet -
*/
static XmlRequest* xmlRequestGet(RequestType request, std::string method)
{
for (unsigned int ix = 0; ix < sizeof(xmlRequest) / sizeof(xmlRequest[0]); ++ix)
{
if ((request == xmlRequest[ix].type) && ((xmlRequest[ix].method == method) || (xmlRequest[ix].method == "*")))
{
if (xmlRequest[ix].parseVector != NULL)
LM_T(LmtHttpRequest, ("Found xmlRequest of type %d, method '%s' - index %d (%s)",
request,
method.c_str(),
ix,
xmlRequest[ix].parseVector[0].path.c_str()));
return &xmlRequest[ix];
}
}
LM_W(("Bad Input (no request found for RequestType '%s', method '%s')", requestType(request), method.c_str()));
return NULL;
}
/* ****************************************************************************
*
* sourceEntityId -
*/
static int sourceEntityId(xml_node<>* node, ParseData* parseDataP)
{
LM_T(LmtParse, ("got a sourceEntityId"));
LM_T(LmtParse, ("calling entityIdParse"));
std::string es = entityIdParse(RegisterContext,
node,
&parseDataP->rcr.registrationMetadataP->association.entityAssociation.source);
LM_T(LmtParse, ("back from entityIdParse"));
if (es != "OK")
{
parseDataP->errorString = es;
LM_W(("Bad Input (error parsing entity: %s)", es.c_str()));
}
return 0;
}
/* ****************************************************************************
*
* ContextElementResponse::fill -
*/
void ContextElementResponse::fill(QueryContextResponse* qcrP, const std::string& entityId, const std::string& entityType)
{
if (qcrP == NULL)
{
statusCode.fill(SccContextElementNotFound);
return;
}
if (qcrP->contextElementResponseVector.size() == 0)
{
statusCode.fill(&qcrP->errorCode);
contextElement.entityId.fill(entityId, entityType, "false");
if ((statusCode.code != SccOk) && (statusCode.details == ""))
{
statusCode.details = "Entity id: /" + entityId + "/";
}
return;
}
//
// FIXME P7: If more than one context element is found, we simply select the first one.
// A better approach would be to change this convop to return a vector of responses.
// Adding a warning with 'Bad Input' - with this I mean that the user that sends the
// query needs to avoid using this conv op to make any queries that can give more than
// one unique context element :-).
// This FIXME is related to github issue #588 and (probably) #650.
// Also, optimizing this would be part of issue #768
//
if (qcrP->contextElementResponseVector.size() > 1)
{
LM_W(("Bad Input (more than one context element found the this query - selecting the first one"));
}
contextElement.fill(&qcrP->contextElementResponseVector[0]->contextElement);
if (qcrP->errorCode.code != SccNone)
{
statusCode.fill(&qcrP->errorCode);
}
}
/* ****************************************************************************
*
* AlarmManager::dbError -
*
* Returns false if no effective alarm transition occurs, otherwise, true is returned.
*/
bool AlarmManager::dbError(const std::string& details)
{
if (dbOk == false)
{
if (dbErrorLogAlways)
{
LM_W(("Repeated Database Error: %s", details.c_str()));
}
return false;
}
semTake();
++dbErrors;
dbOk = false;
semGive();
LM_E(("Raising alarm DatabaseError: %s", details.c_str()));
return true;
}
/* ****************************************************************************
*
* xmlParse -
*
* This function is called once (actually it is not that simple) for each node in
* the tree that the XML parser has built for us.
*
*
* In the node '<contextValue>', isCompoundValuePath returns TRUE.
* Under "<contextValue>", we have either a simple string or a Compound Value Tree.
* In the case of a "simple string" the value of the current node is NON EMPTY,
* and as the node is treated already in the previous call to 'treat()', no further action is needed.
*
* If a node is NOT TREATED and it is NOT a compound, a parse error is issued
*/
void xmlParse
(
ConnectionInfo* ciP,
xml_node<>* father,
xml_node<>* node,
std::string indentation,
std::string fatherPath,
XmlNode* parseVector,
ParseData* parseDataP
)
{
std::string value = wsStrip(node->value());
std::string name = wsStrip(node->name());
std::string path = fatherPath + "/" + name;
bool treated = treat(node, path, parseVector, parseDataP);
if (isCompoundValuePath(path.c_str()) && (value == "") && (node->first_node() != NULL))
{
eatCompound(ciP, NULL, node, "");
compoundValueEnd(ciP, parseDataP);
return;
}
else if (treated == false)
{
ciP->httpStatusCode = SccBadRequest;
if (ciP->answer == "")
ciP->answer = std::string("Unknown XML field: '") + name.c_str() + "'";
LM_W(("ERROR: '%s', PATH: '%s' ", ciP->answer.c_str(), fatherPath.c_str()));
return;
}
// Recursive calls for all children of this node
xml_node<>* child = node->first_node();
while (child != NULL)
{
if ((child != NULL) && (child->name() != NULL) && (onlyWs(child->name()) == false))
xmlParse(ciP, node, child, indentation + " ", path, parseVector, parseDataP);
child = child->next_sibling();
}
}
/* ****************************************************************************
*
* RegisterProviderRequest::check -
*/
std::string RegisterProviderRequest::check(RequestType requestType, Format format, std::string indent, std::string predetectedError, int counter)
{
DiscoverContextAvailabilityResponse response;
std::string res;
if (predetectedError != "")
{
response.errorCode.fill(SccBadRequest, predetectedError);
}
else if (((res = metadataVector.check(requestType, format, indent, "", counter)) != "OK") ||
((res = duration.check(requestType, format, indent, "", 0)) != "OK") ||
((res = providingApplication.check(requestType, format, indent, "", 0)) != "OK") ||
((res = registrationId.check(requestType, format, indent, "", 0)) != "OK"))
{
response.errorCode.fill(SccBadRequest, res);
}
else
return "OK";
LM_W(("RegisterProviderRequest Error"));
return response.render(DiscoverContextAvailability, format, indent);
}
/* ****************************************************************************
*
* mapGetIndividualContextEntityAttribute -
*/
HttpStatusCode mapGetIndividualContextEntityAttribute
(
const std::string& entityId,
const std::string& entityType,
const std::string& attributeName,
ContextAttributeResponse* response,
ConnectionInfo* ciP
)
{
HttpStatusCode ms;
QueryContextRequest qcRequest;
QueryContextResponse qcResponse;
EntityId entity(entityId, entityType, "false");
qcRequest.entityIdVector.push_back(&entity);
qcRequest.attributeList.push_back(attributeName);
ms = mongoQueryContext(&qcRequest, &qcResponse, ciP->tenant, ciP->servicePathV, ciP->uriParam);
if ((ms != SccOk) || (qcResponse.contextElementResponseVector.size() == 0))
{
// Here I fill in statusCode for the response
response->statusCode.fill(SccContextElementNotFound, std::string("Entity id: /") + entityId + "/");
LM_W(("Bad Input (entityId '%s' not found)", entityId.c_str()));
return ms;
}
ContextElementResponse* cerP = qcResponse.contextElementResponseVector[0];
std::vector<ContextAttribute*> attrV = cerP->contextElement.contextAttributeVector.vec;
for (unsigned int ix = 0; ix < attrV.size() ; ++ix)
{
ContextAttribute* ca = new ContextAttribute(attrV[ix]);
response->contextAttributeVector.push_back(ca);
}
response->statusCode.fill(SccOk);
return ms;
}
/* ****************************************************************************
*
* StatusCode::fill -
*/
void StatusCode::fill(const struct UpdateContextResponse& ucrs)
{
if ((ucrs.errorCode.code != SccOk) && (ucrs.errorCode.code != SccNone))
{
fill(ucrs.errorCode);
}
else if (ucrs.contextElementResponseVector.vec.size() == 1)
{
fill(ucrs.contextElementResponseVector.vec[0]->statusCode);
}
else if (ucrs.contextElementResponseVector.vec.size() > 1)
{
LM_W(("Filling StatusCode from UpdateContextResponse with more than one contextElementResponse, picking one of them ..."));
fill(ucrs.contextElementResponseVector.vec[0]->statusCode);
}
else
{
// Empty UpdateContextResponse::contextElementResponseVector AND unfilled UpdateContextResponse::errorCode
LM_E(("Internal Error (can't fill StatusCode from UpdateContextResponse)"));
fill(SccReceiverInternalError, "can't fill StatusCode from UpdateContextResponse");
}
}
/* ****************************************************************************
*
* ScopeVector::check -
*/
std::string ScopeVector::check
(
RequestType requestType,
Format format,
const std::string& indent,
const std::string& predetectedError,
int counter
)
{
for (unsigned int ix = 0; ix < vec.size(); ++ix)
{
std::string res;
if ((res = vec[ix]->check(requestType, format, indent, predetectedError, counter)) != "OK")
{
LM_W(("Bad Input (error in scope %d: %s)", ix, res.c_str()));
return res;
}
}
return "OK";
}
/* ****************************************************************************
*
* EntityTypeAttributesResponse::check -
*/
std::string EntityTypeAttributesResponse::check
(
ConnectionInfo* ciP,
const std::string& indent,
const std::string& predetectedError
)
{
std::string res;
if (predetectedError != "")
{
statusCode.fill(SccBadRequest, predetectedError);
}
else if ((res = entityType.check(ciP, indent, predetectedError)) != "OK")
{
LM_W(("Bad Input (%s)", res.c_str()));
statusCode.fill(SccBadRequest, res);
}
else
return "OK";
return render(ciP, "");
}
/* ****************************************************************************
*
* entityIdParse - help routine for the XML node entityId
*
* Created mainly to not copy the XML attribute lookup stuff
*/
std::string entityIdParse(RequestType requestType, xml_node<>* node, EntityId* entityIdP)
{
for (xml_attribute<> *attr = node->first_attribute(); attr; attr = attr->next_attribute())
{
if (attr->name() == std::string("type"))
{
entityIdP->type = attr->value();
LM_T(LmtEntityId, ("Got a type for an entity: '%s'", entityIdP->type.c_str()));
}
else if (attr->name() == std::string("isPattern"))
{
entityIdP->isPattern = attr->value();
LM_T(LmtEntityId, ("Got an isPattern for an entity: '%s'", entityIdP->isPattern.c_str()));
}
else
{
LM_W(("Bad Input (unsupported attribute '%s' for EntityId)", attr->name()));
return "unsupported attribute for EntityId";
}
}
return "OK";
}
/* ****************************************************************************
*
* mongoUnsubscribeContext -
*/
HttpStatusCode mongoUnsubscribeContext(UnsubscribeContextRequest* requestP, UnsubscribeContextResponse* responseP, const std::string& tenant)
{
bool reqSemTaken;
BSONObj sub;
DBClientBase* connection = NULL;
reqSemTake(__FUNCTION__, "ngsi10 unsubscribe request", SemWriteOp, &reqSemTaken);
LM_T(LmtMongo, ("Unsubscribe Context"));
/* No matter if success or failure, the subscriptionId in the response is always the one
* in the request */
responseP->subscriptionId = requestP->subscriptionId;
if (responseP->subscriptionId.get() == "")
{
responseP->statusCode.fill(SccContextElementNotFound);
LM_W(("Bad Input (no subscriptionId)"));
return SccOk;
}
LM_T(LmtMongo, ("findOne() in '%s' collection _id '%s'}", getSubscribeContextCollectionName(tenant).c_str(),
requestP->subscriptionId.get().c_str()));
/* Look for document */
connection = getMongoConnection();
try
{
OID id = OID(requestP->subscriptionId.get());
sub = connection->findOne(getSubscribeContextCollectionName(tenant).c_str(), BSON("_id" << id));
releaseMongoConnection(connection);
LM_I(("Database Operation Successful (findOne _id: %s)", id.toString().c_str()));
}
catch (const AssertionException &e)
{
releaseMongoConnection(connection);
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (mongo assertion exception)", reqSemTaken);
//
// This happens when OID format is wrong
// FIXME: this checking should be done at parsing stage, without progressing to
// mongoBackend. By the moment we can live this here, but we should remove in the future
// (old issue #95)
//
responseP->statusCode.fill(SccContextElementNotFound);
LM_W(("Bad Input (invalid OID format)"));
return SccOk;
}
catch (const DBException &e)
{
releaseMongoConnection(connection);
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (mongo db exception)", reqSemTaken);
responseP->statusCode.fill(SccReceiverInternalError,
std::string("collection: ") + getSubscribeContextCollectionName(tenant).c_str() +
" - findOne() _id: " + requestP->subscriptionId.get() +
" - exception: " + e.what());
LM_E(("Database Error (%s)", responseP->statusCode.details.c_str()));
return SccOk;
}
catch (...)
{
releaseMongoConnection(connection);
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (mongo generic exception)", reqSemTaken);
responseP->statusCode.fill(SccReceiverInternalError,
std::string("collection: ") + getSubscribeContextCollectionName(tenant).c_str() +
" - findOne() _id: " + requestP->subscriptionId.get() +
" - exception: " + "generic");
LM_E(("Database Error (%s)", responseP->statusCode.details.c_str()));
return SccOk;
}
if (sub.isEmpty())
{
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (no subscriptions found)", reqSemTaken);
responseP->statusCode.fill(SccContextElementNotFound, std::string("subscriptionId: /") + requestP->subscriptionId.get() + "/");
return SccOk;
}
/* Remove document in MongoDB */
// FIXME: I will prefer to do the find and remove in a single operation. Is the some similar
// to findAndModify for this?
LM_T(LmtMongo, ("remove() in '%s' collection _id '%s'}", getSubscribeContextCollectionName(tenant).c_str(),
requestP->subscriptionId.get().c_str()));
connection = getMongoConnection();
try
{
connection->remove(getSubscribeContextCollectionName(tenant).c_str(), BSON("_id" << OID(requestP->subscriptionId.get())));
releaseMongoConnection(connection);
LM_I(("Database Operation Successful (remove _id: %s)", requestP->subscriptionId.get().c_str()));
}
catch (const DBException &e)
{
releaseMongoConnection(connection);
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (mongo db exception)", reqSemTaken);
responseP->statusCode.fill(SccReceiverInternalError,
std::string("collection: ") + getSubscribeContextCollectionName(tenant).c_str() +
" - remove() _id: " + requestP->subscriptionId.get().c_str() +
" - exception: " + e.what());
LM_E(("Database Error (%s)", responseP->statusCode.details.c_str()));
return SccOk;
}
catch (...)
{
releaseMongoConnection(connection);
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request (mongo generic exception)", reqSemTaken);
responseP->statusCode.fill(SccReceiverInternalError,
std::string("collection: ") + getSubscribeContextCollectionName(tenant).c_str() +
" - remove() _id: " + requestP->subscriptionId.get().c_str() +
" - exception: " + "generic");
LM_E(("Database Error (%s)", responseP->statusCode.details.c_str()));
return SccOk;
}
/* Destroy any previous ONTIMEINTERVAL thread */
getNotifier()->destroyOntimeIntervalThreads(requestP->subscriptionId.get());
responseP->statusCode.fill(SccOk);
reqSemGive(__FUNCTION__, "ngsi10 unsubscribe request", reqSemTaken);
//
// Removing subscription from cache
//
subCache->remove(tenant, "", requestP->subscriptionId.get());
return SccOk;
}
/* ****************************************************************************
*
* postUpdateContext -
*
* POST /v1/updateContext
* POST /ngsi10/updateContext
*
* Payload In: UpdateContextRequest
* Payload Out: UpdateContextResponse
*/
std::string postUpdateContext
(
ConnectionInfo* ciP,
int components,
std::vector<std::string>& compV,
ParseData* parseDataP
)
{
UpdateContextResponse* upcrsP = &parseDataP->upcrs.res;
UpdateContextRequest* upcrP = &parseDataP->upcr.res;
std::string answer;
//
// 01. Check service-path consistency
//
// If more than ONE service-path is input, an error is returned as response.
// If NO service-path is issued, then the default service-path "/" is used.
// After these checks, the service-path is checked to be 'correct'.
//
if (ciP->servicePathV.size() > 1)
{
upcrsP->errorCode.fill(SccBadRequest, "more than one service path in context update request");
LM_W(("Bad Input (more than one service path for an update request)"));
answer = upcrsP->render(ciP, UpdateContext, "");
return answer;
}
else if (ciP->servicePathV.size() == 0)
{
ciP->servicePathV.push_back(DEFAULT_SERVICE_PATH);
}
std::string res = servicePathCheck(ciP->servicePathV[0].c_str());
if (res != "OK")
{
upcrsP->errorCode.fill(SccBadRequest, res);
answer = upcrsP->render(ciP, UpdateContext, "");
return answer;
}
//
// 02. Send the request to mongoBackend/mongoUpdateContext
//
upcrsP->errorCode.fill(SccOk);
attributesToNotFound(upcrP);
ciP->httpStatusCode = mongoUpdateContext(upcrP, upcrsP, ciP->tenant, ciP->servicePathV, ciP->uriParam, ciP->httpHeaders.xauthToken, "postUpdateContext");
foundAndNotFoundAttributeSeparation(upcrsP, upcrP, ciP);
//
// 03. Normal case - no forwards
//
// If there is nothing to forward, just return the result
//
bool forwarding = forwardsPending(upcrsP);
if (forwarding == false)
{
answer = upcrsP->render(ciP, UpdateContext, "");
upcrP->release();
return answer;
}
//
// 04. mongoBackend doesn't give us the values of the attributes.
// So, here we have to do a search inside the initial UpdateContextRequest to fill in all the
// attribute-values in the output from mongoUpdateContext
//
for (unsigned int cerIx = 0; cerIx < upcrsP->contextElementResponseVector.size(); ++cerIx)
{
ContextElement* ceP = &upcrsP->contextElementResponseVector[cerIx]->contextElement;
for (unsigned int aIx = 0; aIx < ceP->contextAttributeVector.size(); ++aIx)
{
ContextAttribute* aP = upcrP->attributeLookup(&ceP->entityId, ceP->contextAttributeVector[aIx]->name);
if (aP == NULL)
{
LM_E(("Internal Error (attribute '%s' not found)", ceP->contextAttributeVector[aIx]->name.c_str()));
}
else
{
ceP->contextAttributeVector[aIx]->value = aP->value;
ceP->contextAttributeVector[aIx]->type = aP->type;
}
}
}
//
// 05. Forwards necessary - sort parts in outgoing requestV
// requestV is a vector of UpdateContextRequests and each Context Provider
// will have a slot in the vector.
// When a ContextElementResponse is found in the output from mongoUpdateContext, a
// UpdateContextRequest is to be found/created and inside that UpdateContextRequest
// a ContextElement for the Entity of the ContextElementResponse.
//
// Non-found parts go directly to 'response'.
//
UpdateContextRequestVector requestV;
UpdateContextResponse response;
response.errorCode.fill(SccOk);
for (unsigned int cerIx = 0; cerIx < upcrsP->contextElementResponseVector.size(); ++cerIx)
{
ContextElementResponse* cerP = upcrsP->contextElementResponseVector[cerIx];
if (cerP->contextElement.contextAttributeVector.size() == 0)
{
//
// If we find a contextElement without attributes here, then something is wrong
//
LM_E(("Orion Bug (empty contextAttributeVector for ContextElementResponse %d)", cerIx));
}
else
{
for (unsigned int aIx = 0; aIx < cerP->contextElement.contextAttributeVector.size(); ++aIx)
{
ContextAttribute* aP = cerP->contextElement.contextAttributeVector[aIx];
//
// 0. If the attribute is 'not-found' - just add the attribute to the outgoing response
//
if (aP->found == false)
{
response.notFoundPush(&cerP->contextElement.entityId, new ContextAttribute(aP), NULL);
continue;
}
//
// 1. If the attribute is found locally - just add the attribute to the outgoing response
//
if (aP->providingApplication.get() == "")
{
response.foundPush(&cerP->contextElement.entityId, new ContextAttribute(aP));
continue;
}
//
// 2. Lookup UpdateContextRequest in requestV according to providingApplication.
// If not found, add one.
UpdateContextRequest* reqP = requestV.lookup(aP->providingApplication.get());
if (reqP == NULL)
{
reqP = new UpdateContextRequest(aP->providingApplication.get(), &cerP->contextElement.entityId);
reqP->updateActionType.set("UPDATE");
requestV.push_back(reqP);
}
//
// 3. Increase the correct format counter
//
if (aP->providingApplication.getFormat() == XML)
{
reqP->xmls++;
}
else
{
reqP->jsons++;
}
//
// 3. Lookup ContextElement in UpdateContextRequest according to EntityId.
// If not found, add one (to the ContextElementVector of the UpdateContextRequest).
//
ContextElement* ceP = reqP->contextElementVector.lookup(&cerP->contextElement.entityId);
if (ceP == NULL)
{
ceP = new ContextElement(&cerP->contextElement.entityId);
reqP->contextElementVector.push_back(ceP);
}
//
// 4. Add ContextAttribute to the correct ContextElement in the correct UpdateContextRequest
//
ceP->contextAttributeVector.push_back(new ContextAttribute(aP));
}
}
}
//
// Now we are ready to forward the Updates
//
//
// Calling each of the Context Providers, merging their results into the
// total response 'response'
//
for (unsigned int ix = 0; ix < requestV.size(); ++ix)
{
if (requestV[ix]->contextProvider == "")
{
LM_E(("Internal Error (empty context provider string)"));
continue;
}
UpdateContextResponse upcrs;
Format format = requestV[ix]->format();
updateForward(ciP, requestV[ix], &upcrs, format);
//
// Add the result from the forwarded update to the total response in 'response'
//
response.merge(&upcrs);
}
answer = response.render(ciP, UpdateContext, "");
//
// Cleanup
//
upcrP->release();
requestV.release();
upcrsP->release();
upcrsP->fill(&response);
response.release();
return answer;
}
/* ****************************************************************************
*
* updateForward -
*
* An entity/attribute has been found on some context provider.
* We need to forward the update request to the context provider, indicated in upcrsP->contextProvider
*
* 1. Parse the providing application to extract IP, port and URI-path
* 2. Render the string of the request we want to forward
* 3. Send the request to the providing application (and await the response)
* 4. Parse the response and fill in a binary UpdateContextResponse
* 5. Fill in the response from the redirection into the response of this function
* 6. 'Fix' StatusCode
* 7. Freeing memory
*
*
* FIXME P5: The function 'updateForward' is implemented to pick the format (XML or JSON) based on the
* count of the Format for all the participating attributes. If we have more attributes 'preferring'
* XML than JSON, the forward is done in XML, etc. This is all OK.
* What is not OK is that the Accept HTTP header is set to the same format as the Content-Type HTTP Header.
* While this is acceptable, it is not great. As the broker understands both XML and JSON, we could send
* the forward message with an Acceot header of XML/JSON and then at reading the response, instead of
* throwing away the HTTP headers, we could read the "Content-Type" and do the parse according the Content-Type.
*/
static void updateForward(ConnectionInfo* ciP, UpdateContextRequest* upcrP, UpdateContextResponse* upcrsP, Format format)
{
std::string ip;
std::string protocol;
int port;
std::string prefix;
std::string answer;
//
// 1. Parse the providing application to extract IP, port and URI-path
//
if (parseUrl(upcrP->contextProvider, ip, port, prefix, protocol) == false)
{
LM_W(("Bad Input (invalid providing application '%s')", upcrP->contextProvider.c_str()));
// Somehow, if we accepted this providing application, it is the brokers fault ...
// SccBadRequest should have been returned before, when it was registered!
upcrsP->errorCode.fill(SccContextElementNotFound, "");
return;
}
//
// 2. Render the string of the request we want to forward
//
Format outFormat = ciP->outFormat;
std::string payload;
char* cleanPayload;
ciP->outFormat = format;
payload = upcrP->render(ciP, UpdateContext, "");
ciP->outFormat = outFormat;
cleanPayload = (char*) payload.c_str();
if (format == XML)
{
if ((cleanPayload = xmlPayloadClean(payload.c_str(), "<updateContextRequest>")) == NULL)
{
LM_E(("Runtime Error (error rendering forward-request)"));
upcrsP->errorCode.fill(SccContextElementNotFound, "");
return;
}
}
//
// 3. Send the request to the Context Provider (and await the reply)
// FIXME P7: Should Rush be used?
//
std::string out;
std::string verb = "POST";
std::string resource = prefix + "/updateContext";
std::string tenant = ciP->tenant;
std::string servicePath = (ciP->httpHeaders.servicePathReceived == true)? ciP->httpHeaders.servicePath : "";
std::string mimeType = (format == XML)? "application/xml" : "application/json";
out = httpRequestSend(ip,
port,
protocol,
verb,
tenant,
servicePath,
ciP->httpHeaders.xauthToken,
resource,
mimeType,
cleanPayload,
false,
true,
mimeType);
if ((out == "error") || (out == ""))
{
upcrsP->errorCode.fill(SccContextElementNotFound, "");
LM_E(("Runtime Error (error forwarding 'Update' to providing application)"));
return;
}
//
// 4. Parse the response and fill in a binary UpdateContextResponse
//
std::string s;
std::string errorMsg;
if (format == XML)
{
cleanPayload = xmlPayloadClean(out.c_str(), "<updateContextResponse>");
}
else
{
cleanPayload = jsonPayloadClean(out.c_str());
}
if ((cleanPayload == NULL) || (cleanPayload[0] == 0))
{
//
// This is really an internal error in the Context Provider
// It is not in the orion broker though, so 404 is returned
//
LM_W(("Other Error (context provider response to UpdateContext is empty)"));
upcrsP->errorCode.fill(SccContextElementNotFound, "invalid context provider response");
return;
}
//
// NOTE
// When coming from a convenience operation, such as GET /v1/contextEntities/EID/attributes/attrName,
// the verb/method in ciP is GET. However, the parsing function expects a POST, as if it came from a
// POST /v1/updateContext.
// So, here we change the verb/method for POST.
//
ParseData parseData;
ciP->verb = POST;
ciP->method = "POST";
parseData.upcrs.res.errorCode.fill(SccOk);
if (format == XML)
{
s = xmlTreat(cleanPayload, ciP, &parseData, RtUpdateContextResponse, "updateContextResponse", NULL, &errorMsg);
}
else
{
s = jsonTreat(cleanPayload, ciP, &parseData, RtUpdateContextResponse, "updateContextResponse", NULL);
}
if (s != "OK")
{
LM_W(("Internal Error (error parsing reply from prov app: %s)", errorMsg.c_str()));
upcrsP->errorCode.fill(SccContextElementNotFound, "");
parseData.upcr.res.release();
parseData.upcrs.res.release();
return;
}
//
// 5. Fill in the response from the redirection into the response of this function
//
upcrsP->fill(&parseData.upcrs.res);
//
// 6. 'Fix' StatusCode
//
if (upcrsP->errorCode.code == SccNone)
{
upcrsP->errorCode.fill(SccOk);
}
if ((upcrsP->contextElementResponseVector.size() == 1) && (upcrsP->contextElementResponseVector[0]->statusCode.code == SccContextElementNotFound))
{
upcrsP->errorCode.fill(SccContextElementNotFound);
}
//
// 7. Freeing memory
//
parseData.upcr.res.release();
parseData.upcrs.res.release();
}
/* ****************************************************************************
*
* connectionTreat -
*
* This is the MHD_AccessHandlerCallback function for MHD_start_daemon
* This function returns:
* o MHD_YES if the connection was handled successfully
* o MHD_NO if the socket must be closed due to a serious error
*
* - This function is called once when the headers are read and the ciP is created.
* - Then it is called for data payload and once all the payload an acknowledgement
* must be done, setting *upload_data_size to ZERO.
* - The last call is made with *upload_data_size == 0 and now is when the connection
* is open to send responses.
*
* Call 1: *con_cls == NULL
* Call 2: *con_cls != NULL AND *upload_data_size != 0
* Call 3: *con_cls != NULL AND *upload_data_size == 0
*/
static int connectionTreat
(
void* cls,
MHD_Connection* connection,
const char* url,
const char* method,
const char* version,
const char* upload_data,
size_t* upload_data_size,
void** con_cls
)
{
ConnectionInfo* ciP = (ConnectionInfo*) *con_cls;
size_t dataLen = *upload_data_size;
// 1. First call - setup ConnectionInfo and get/check HTTP headers
if (ciP == NULL)
{
//
// IP Address and port of caller
//
char ip[32];
unsigned short port = 0;
const union MHD_ConnectionInfo* mciP = MHD_get_connection_info(connection, MHD_CONNECTION_INFO_CLIENT_ADDRESS);
if (mciP != NULL)
{
port = (mciP->client_addr->sa_data[0] << 8) + mciP->client_addr->sa_data[1];
snprintf(ip, sizeof(ip), "%d.%d.%d.%d", mciP->client_addr->sa_data[2] & 0xFF, mciP->client_addr->sa_data[3] & 0xFF, mciP->client_addr->sa_data[4] & 0xFF, mciP->client_addr->sa_data[5] & 0xFF);
}
else
{
port = 0;
snprintf(ip, sizeof(ip), "IP unknown");
}
//
// ConnectionInfo
//
if ((ciP = new ConnectionInfo(url, method, version, connection)) == NULL)
{
LM_E(("Runtime Error (error allocating ConnectionInfo)"));
return MHD_NO;
}
*con_cls = (void*) ciP; // Pointer to ConnectionInfo for subsequent calls
ciP->port = port;
ciP->ip = ip;
//
// Transaction starts here
//
LM_TRANSACTION_START("from", ip, port, url); // Incoming REST request starts
//
// URI parameters
//
ciP->uriParam[URI_PARAM_NOTIFY_FORMAT] = DEFAULT_PARAM_NOTIFY_FORMAT;
ciP->uriParam[URI_PARAM_PAGINATION_OFFSET] = DEFAULT_PAGINATION_OFFSET;
ciP->uriParam[URI_PARAM_PAGINATION_LIMIT] = DEFAULT_PAGINATION_LIMIT;
ciP->uriParam[URI_PARAM_PAGINATION_DETAILS] = DEFAULT_PAGINATION_DETAILS;
MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, uriArgumentGet, ciP);
if (ciP->httpStatusCode != SccOk)
{
LM_W(("Bad Input (error in URI parameters)"));
restReply(ciP, ciP->answer);
return MHD_YES;
}
LM_T(LmtUriParams, ("notifyFormat: '%s'", ciP->uriParam[URI_PARAM_NOTIFY_FORMAT].c_str()));
MHD_get_connection_values(connection, MHD_HEADER_KIND, httpHeaderGet, &ciP->httpHeaders);
char tenant[128];
ciP->tenantFromHttpHeader = strToLower(tenant, ciP->httpHeaders.tenant.c_str(), sizeof(tenant));
LM_T(LmtTenant, ("HTTP tenant: '%s'", ciP->httpHeaders.tenant.c_str()));
ciP->outFormat = wantedOutputSupported(ciP->httpHeaders.accept, &ciP->charset);
if (ciP->outFormat == NOFORMAT)
ciP->outFormat = XML; // XML is default output format
ciP->servicePath = ciP->httpHeaders.servicePath;
if (servicePathSplit(ciP) != 0)
{
LM_W(("Bad Input (error in ServicePath http-header)"));
restReply(ciP, ciP->answer);
}
if (contentTypeCheck(ciP) != 0)
{
LM_W(("Bad Input (invalid mime-type in Content-Type http-header)"));
restReply(ciP, ciP->answer);
}
else if (outFormatCheck(ciP) != 0)
{
LM_W(("Bad Input (invalid mime-type in Accept http-header)"));
restReply(ciP, ciP->answer);
}
else
ciP->inFormat = formatParse(ciP->httpHeaders.contentType, NULL);
// Set default mime-type for notifications
if (ciP->uriParam[URI_PARAM_NOTIFY_FORMAT] == "")
{
if (ciP->outFormat == XML)
ciP->uriParam[URI_PARAM_NOTIFY_FORMAT] = "XML";
else if (ciP->outFormat == JSON)
ciP->uriParam[URI_PARAM_NOTIFY_FORMAT] = "JSON";
else
ciP->uriParam[URI_PARAM_NOTIFY_FORMAT] = "XML";
LM_T(LmtUriParams, ("'default' value for notifyFormat (ciP->outFormat == %d)): '%s'", ciP->outFormat, ciP->uriParam[URI_PARAM_NOTIFY_FORMAT].c_str()));
}
return MHD_YES;
}
//
// 2. Data gathering calls
//
// 2-1. Data gathering calls, just wait
// 2-2. Last data gathering call, acknowledge the receipt of data
//
if (dataLen != 0)
{
if (dataLen == ciP->httpHeaders.contentLength)
{
if (ciP->httpHeaders.contentLength <= PAYLOAD_MAX_SIZE)
{
if (ciP->httpHeaders.contentLength > STATIC_BUFFER_SIZE)
ciP->payload = (char*) malloc(ciP->httpHeaders.contentLength + 1);
else
ciP->payload = static_buffer;
ciP->payloadSize = dataLen;
memcpy(ciP->payload, upload_data, dataLen);
ciP->payload[dataLen] = 0;
}
else
{
char details[256];
snprintf(details, sizeof(details), "payload size: %d, max size supported: %d", ciP->httpHeaders.contentLength, PAYLOAD_MAX_SIZE);
ciP->answer = restErrorReplyGet(ciP, ciP->outFormat, "", ciP->url, SccRequestEntityTooLarge, details);
ciP->httpStatusCode = SccRequestEntityTooLarge;
}
// All payload received, acknowledge!
*upload_data_size = 0;
}
else
LM_T(LmtPartialPayload, ("Got %d of payload of %d bytes", dataLen, ciP->httpHeaders.contentLength));
return MHD_YES;
}
// 3. Finally, serve the request (unless an error has occurred)
if (((ciP->verb == POST) || (ciP->verb == PUT)) && (ciP->httpHeaders.contentLength == 0) && (strncasecmp(ciP->url.c_str(), "/log/", 5) != 0))
{
std::string errorMsg = restErrorReplyGet(ciP, ciP->outFormat, "", url, SccLengthRequired, "Zero/No Content-Length in PUT/POST request");
ciP->httpStatusCode = SccLengthRequired;
restReply(ciP, errorMsg);
}
else if (ciP->answer != "")
restReply(ciP, ciP->answer);
else
serveFunction(ciP);
return MHD_YES;
}
