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/* commands.cpp
db "commands" (sent via db.$cmd.findOne(...))
*/
/**
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 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 <http://www.gnu.org/licenses/>.
*/
#include "pch.h"
#include "query.h"
#include "pdfile.h"
#include "jsobj.h"
#include "../bson/util/builder.h"
#include <time.h>
#include "introspect.h"
#include "btree.h"
#include "../util/lruishmap.h"
#include "json.h"
#include "repl.h"
#include "commands.h"
#include "cmdline.h"
#include "../scripting/engine.h"
namespace mongo {
const int edebug=0;
bool dbEval(const char *ns, BSONObj& cmd, BSONObjBuilder& result, string& errmsg) {
BSONElement e = cmd.firstElement();
uassert( 10046 , "eval needs Code" , e.type() == Code || e.type() == CodeWScope || e.type() == String );
const char *code = 0;
switch ( e.type() ) {
case String:
case Code:
code = e.valuestr();
break;
case CodeWScope:
code = e.codeWScopeCode();
break;
default:
assert(0);
}
assert( code );
if ( ! globalScriptEngine ) {
errmsg = "db side execution is disabled";
return false;
}
auto_ptr<Scope> s = globalScriptEngine->getPooledScope( ns );
ScriptingFunction f = s->createFunction(code);
if ( f == 0 ) {
errmsg = (string)"compile failed: " + s->getError();
return false;
}
if ( e.type() == CodeWScope )
s->init( e.codeWScopeScopeData() );
s->localConnect( cc().database()->name.c_str() );
BSONObj args;
{
BSONElement argsElement = cmd.getField("args");
if ( argsElement.type() == Array ) {
args = argsElement.embeddedObject();
if ( edebug ) {
out() << "args:" << args.toString() << endl;
out() << "code:\n" << code << endl;
}
}
}
int res;
{
Timer t;
res = s->invoke(f,args, cmdLine.quota ? 10 * 60 * 1000 : 0 );
int m = t.millis();
if ( m > cmdLine.slowMS ) {
out() << "dbeval slow, time: " << dec << m << "ms " << ns << endl;
if ( m >= 1000 ) log() << code << endl;
else OCCASIONALLY log() << code << endl;
}
}
if ( res ) {
result.append("errno", (double) res);
errmsg = "invoke failed: ";
errmsg += s->getError();
return false;
}
s->append( result , "retval" , "return" );
return true;
}
class CmdEval : public Command {
public:
virtual bool slaveOk() const {
return false;
}
virtual void help( stringstream &help ) const {
help << "Evaluate javascript at the server.\n" "http://www.mongodb.org/display/DOCS/Server-side+Code+Execution";
}
// We need at least read only access to run db.eval - auth for eval'd writes will be checked
// as they are requested.
virtual bool requiresAuth() {
return false;
}
virtual LockType locktype() const { return NONE; }
CmdEval() : Command("eval", false, "$eval") { }
bool run(const string& dbname , BSONObj& cmdObj, string& errmsg, BSONObjBuilder& result, bool fromRepl) {
AuthenticationInfo *ai = cc().getAuthenticationInfo();
uassert( 12598 , "$eval reads unauthorized", ai->isAuthorizedReads(dbname.c_str()) );
// write security will be enforced in DBDirectClient
mongolock lk( ai->isAuthorized( dbname.c_str() ) );
Client::Context ctx( dbname );
return dbEval(dbname.c_str(), cmdObj, result, errmsg);
}
} cmdeval;
} // namespace mongo
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