1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd is copyright (C) 2002-2004 ChatSpike-Dev.
7 * <brain@chatspike.net>
8 * <Craig@chatspike.net>
11 * Written by Craig Edwards, Craig McLure, and others.
12 * This program is free but copyrighted software; see
13 * the file COPYING for details.
15 * ---------------------------------------------------
30 #include "configreader.h"
34 /* $ModDesc: PostgreSQL Service Provider module for all other m_sql* modules, uses v2 of the SQL API */
35 /* $CompileFlags: -I`pg_config --includedir` `perl extra/pgsql_config.pl` */
36 /* $LinkerFlags: -L`pg_config --libdir` -lpq */
37 /* $ModDep: m_sqlv2.h */
39 /* UGH, UGH, UGH, UGH, UGH, UGH
40 * I'm having trouble seeing how I
41 * can avoid this. The core-defined
42 * constructors for InspSocket just
43 * aren't suitable...and if I'm
44 * reimplementing them I need this so
45 * I can access the socket engine :\
48 /* Forward declare, so we can have the typedef neatly at the top */
50 /* Also needs forward declaration, as it's used inside SQLconn */
53 typedef std::map<std::string, SQLConn*> ConnMap;
55 /* CREAD, Connecting and wants read event
56 * CWRITE, Connecting and wants write event
57 * WREAD, Connected/Working and wants read event
58 * WWRITE, Connected/Working and wants write event
59 * RREAD, Resetting and wants read event
60 * RWRITE, Resetting and wants write event
62 enum SQLstatus { CREAD, CWRITE, WREAD, WWRITE, RREAD, RWRITE };
64 /** SQLhost, simple structure to store information about a SQL-connection-to-be
65 * We use this struct simply to make it neater passing around host information
66 * when we're creating connections and resolving hosts.
67 * Rather than giving SQLresolver a parameter for every field here so it can in
68 * turn call SQLConn's constructor with them all, both can simply use a SQLhost.
73 std::string id; /* Database handle id */
74 std::string host; /* Database server hostname */
75 unsigned int port; /* Database server port */
76 std::string name; /* Database name */
77 std::string user; /* Database username */
78 std::string pass; /* Database password */
79 bool ssl; /* If we should require SSL */
85 SQLhost(const std::string& i, const std::string& h, unsigned int p, const std::string& n, const std::string& u, const std::string& pa, bool s)
86 : id(i), host(h), port(p), name(n), user(u), pass(pa), ssl(s)
91 /** Used to resolve sql server hostnames
93 class SQLresolver : public Resolver
99 SQLresolver(ModulePgSQL* m, InspIRCd* Instance, const SQLhost& hi)
100 : Resolver(Instance, hi.host, DNS_QUERY_FORWARD, (Module*)m), host(hi), mod(m)
104 virtual void OnLookupComplete(const std::string &result);
106 virtual void OnError(ResolverError e, const std::string &errormessage)
108 ServerInstance->Log(DEBUG, "DNS lookup failed (%s), dying horribly", errormessage.c_str());
111 virtual ~SQLresolver()
116 /** QueryQueue, a queue of queries waiting to be executed.
117 * This maintains two queues internally, one for 'priority'
118 * queries and one for less important ones. Each queue has
119 * new queries appended to it and ones to execute are popped
120 * off the front. This keeps them flowing round nicely and no
121 * query should ever get 'stuck' for too long. If there are
122 * queries in the priority queue they will be executed first,
123 * 'unimportant' queries will only be executed when the
124 * priority queue is empty.
126 * We store lists of SQLrequest's here, by value as we want to avoid storing
127 * any data allocated inside the client module (in case that module is unloaded
128 * while the query is in progress).
130 * Because we want to work on the current SQLrequest in-situ, we need a way
131 * of accessing the request we are currently processing, QueryQueue::front(),
132 * but that call needs to always return the same request until that request
133 * is removed from the queue, this is what the 'which' variable is. New queries are
134 * always added to the back of one of the two queues, but if when front()
135 * is first called then the priority queue is empty then front() will return
136 * a query from the normal queue, but if a query is then added to the priority
137 * queue then front() must continue to return the front of the *normal* queue
138 * until pop() is called.
141 class QueryQueue : public classbase
144 typedef std::deque<SQLrequest> ReqDeque;
146 ReqDeque priority; /* The priority queue */
147 ReqDeque normal; /* The 'normal' queue */
148 enum { PRI, NOR, NON } which; /* Which queue the currently active element is at the front of */
156 void push(const SQLrequest &q)
158 //ServerInstance->Log(DEBUG, "QueryQueue::push(): Adding %s query to queue: %s", ((q.pri) ? "priority" : "non-priority"), q.query.q.c_str());
161 priority.push_back(q);
168 if((which == PRI) && priority.size())
170 priority.pop_front();
172 else if((which == NOR) && normal.size())
180 /* Silently do nothing if there was no element to pop() */
188 return priority.front();
190 return normal.front();
195 return priority.front();
201 return normal.front();
204 /* This will probably result in a segfault,
205 * but the caller should have checked totalsize()
206 * first so..meh - moron :p
209 return priority.front();
213 std::pair<int, int> size()
215 return std::make_pair(priority.size(), normal.size());
220 return priority.size() + normal.size();
223 void PurgeModule(Module* mod)
225 DoPurgeModule(mod, priority);
226 DoPurgeModule(mod, normal);
230 void DoPurgeModule(Module* mod, ReqDeque& q)
232 for(ReqDeque::iterator iter = q.begin(); iter != q.end(); iter++)
234 if(iter->GetSource() == mod)
236 if(iter->id == front().id)
238 /* It's the currently active query.. :x */
239 iter->SetSource(NULL);
243 /* It hasn't been executed yet..just remove it */
244 iter = q.erase(iter);
251 /** PgSQLresult is a subclass of the mostly-pure-virtual class SQLresult.
252 * All SQL providers must create their own subclass and define it's methods using that
253 * database library's data retriveal functions. The aim is to avoid a slow and inefficient process
254 * of converting all data to a common format before it reaches the result structure. This way
255 * data is passes to the module nearly as directly as if it was using the API directly itself.
258 class PgSQLresult : public SQLresult
265 SQLfieldList* fieldlist;
266 SQLfieldMap* fieldmap;
268 PgSQLresult(Module* self, Module* to, unsigned long id, PGresult* result)
269 : SQLresult(self, to, id), res(result), currentrow(0), fieldlist(NULL), fieldmap(NULL)
271 rows = PQntuples(res);
272 cols = PQnfields(res);
274 //ServerInstance->Log(DEBUG, "Created new PgSQL result; %d rows, %d columns, %s affected", rows, cols, PQcmdTuples(res));
279 /* If we allocated these, free them... */
293 return atoi(PQcmdTuples(res));
303 return PQnfields(res);
306 virtual std::string ColName(int column)
308 char* name = PQfname(res, column);
310 return (name) ? name : "";
313 virtual int ColNum(const std::string &column)
315 int n = PQfnumber(res, column.c_str());
319 throw SQLbadColName();
327 virtual SQLfield GetValue(int row, int column)
329 char* v = PQgetvalue(res, row, column);
333 return SQLfield(std::string(v, PQgetlength(res, row, column)), PQgetisnull(res, row, column));
337 //ServerInstance->Log(DEBUG, "PQgetvalue returned a null pointer..nobody wants to tell us what this means");
338 throw SQLbadColName();
342 virtual SQLfieldList& GetRow()
344 /* In an effort to reduce overhead we don't actually allocate the list
345 * until the first time it's needed...so...
353 fieldlist = new SQLfieldList;
356 if(currentrow < PQntuples(res))
358 int cols = PQnfields(res);
360 for(int i = 0; i < cols; i++)
362 fieldlist->push_back(GetValue(currentrow, i));
371 virtual SQLfieldMap& GetRowMap()
373 /* In an effort to reduce overhead we don't actually allocate the map
374 * until the first time it's needed...so...
382 fieldmap = new SQLfieldMap;
385 if(currentrow < PQntuples(res))
387 int cols = PQnfields(res);
389 for(int i = 0; i < cols; i++)
391 fieldmap->insert(std::make_pair(ColName(i), GetValue(currentrow, i)));
400 virtual SQLfieldList* GetRowPtr()
402 SQLfieldList* fl = new SQLfieldList;
404 if(currentrow < PQntuples(res))
406 int cols = PQnfields(res);
408 for(int i = 0; i < cols; i++)
410 fl->push_back(GetValue(currentrow, i));
419 virtual SQLfieldMap* GetRowMapPtr()
421 SQLfieldMap* fm = new SQLfieldMap;
423 if(currentrow < PQntuples(res))
425 int cols = PQnfields(res);
427 for(int i = 0; i < cols; i++)
429 fm->insert(std::make_pair(ColName(i), GetValue(currentrow, i)));
438 virtual void Free(SQLfieldMap* fm)
443 virtual void Free(SQLfieldList* fl)
449 /** SQLConn represents one SQL session.
450 * Each session has its own persistent connection to the database.
451 * This is a subclass of InspSocket so it can easily recieve read/write events from the core socket
452 * engine, unlike the original MySQL module this module does not block. Ever. It gets a mild stabbing
456 class SQLConn : public InspSocket
459 ModulePgSQL* us; /* Pointer to the SQL provider itself */
460 std::string dbhost; /* Database server hostname */
461 unsigned int dbport; /* Database server port */
462 std::string dbname; /* Database name */
463 std::string dbuser; /* Database username */
464 std::string dbpass; /* Database password */
465 bool ssl; /* If we should require SSL */
466 PGconn* sql; /* PgSQL database connection handle */
467 SQLstatus status; /* PgSQL database connection status */
468 bool qinprog;/* If there is currently a query in progress */
469 QueryQueue queue; /* Queue of queries waiting to be executed on this connection */
470 time_t idle; /* Time we last heard from the database */
474 /* This class should only ever be created inside this module, using this constructor, so we don't have to worry about the default ones */
476 SQLConn(InspIRCd* SI, ModulePgSQL* self, const SQLhost& hostinfo);
482 virtual void Close();
486 bool DoConnectedPoll();
492 virtual bool OnDataReady();
494 virtual bool OnWriteReady();
496 virtual bool OnConnected();
502 std::string MkInfoStr();
504 const char* StatusStr();
506 SQLerror DoQuery(SQLrequest &req);
508 SQLerror Query(const SQLrequest &req);
510 void OnUnloadModule(Module* mod);
513 class ModulePgSQL : public Module
518 unsigned long currid;
522 ModulePgSQL(InspIRCd* Me)
523 : Module::Module(Me), currid(0)
525 ServerInstance->Log(DEBUG, "%s 'SQL' feature", ServerInstance->PublishFeature("SQL", this) ? "Published" : "Couldn't publish");
527 sqlsuccess = new char[strlen(SQLSUCCESS)+1];
529 strlcpy(sqlsuccess, SQLSUCCESS, strlen(SQLSUCCESS)+1);
534 void Implements(char* List)
536 List[I_OnUnloadModule] = List[I_OnRequest] = List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCheckReady] = List[I_OnUserDisconnect] = 1;
539 virtual void OnRehash(const std::string ¶meter)
541 ConfigReader conf(ServerInstance);
543 /* Delete all the SQLConn objects in the connection lists,
544 * this will call their destructors where they can handle
545 * closing connections and such.
547 for(ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
549 DELETE(iter->second);
552 /* Empty out our list of connections */
555 for(int i = 0; i < conf.Enumerate("database"); i++)
561 host.id = conf.ReadValue("database", "id", i);
562 host.host = conf.ReadValue("database", "hostname", i);
563 host.port = conf.ReadInteger("database", "port", i, true);
564 host.name = conf.ReadValue("database", "name", i);
565 host.user = conf.ReadValue("database", "username", i);
566 host.pass = conf.ReadValue("database", "password", i);
567 host.ssl = conf.ReadFlag("database", "ssl", i);
569 ipvalid = insp_aton(host.host.c_str(), &blargle);
573 /* The conversion succeeded, we were given an IP and we can give it straight to SQLConn */
576 else if(ipvalid == 0)
578 /* Conversion failed, assume it's a host */
579 SQLresolver* resolver;
583 resolver = new SQLresolver(this, ServerInstance, host);
585 ServerInstance->AddResolver(resolver);
589 ServerInstance->Log(DEBUG, "Couldn't make a SQLresolver..this connection is gonna diiiiiie...actually we just won't create it");
594 /* Invalid address family, die horribly. */
595 ServerInstance->Log(DEBUG, "insp_aton failed returning -1, oh noes.");
600 void AddConn(const SQLhost& hi)
604 /* The conversion succeeded, we were given an IP and we can give it straight to SQLConn */
605 newconn = new SQLConn(ServerInstance, this, hi);
607 connections.insert(std::make_pair(hi.id, newconn));
610 virtual char* OnRequest(Request* request)
612 if(strcmp(SQLREQID, request->GetId()) == 0)
614 SQLrequest* req = (SQLrequest*)request;
615 ConnMap::iterator iter;
617 ServerInstance->Log(DEBUG, "Got query: '%s' with %d replacement parameters on id '%s'", req->query.q.c_str(), req->query.p.size(), req->dbid.c_str());
619 if((iter = connections.find(req->dbid)) != connections.end())
623 req->error = iter->second->Query(*req);
625 return (req->error.Id() == NO_ERROR) ? sqlsuccess : NULL;
629 req->error.Id(BAD_DBID);
634 ServerInstance->Log(DEBUG, "Got unsupported API version string: %s", request->GetId());
639 virtual void OnUnloadModule(Module* mod, const std::string& name)
641 /* When a module unloads we have to check all the pending queries for all our connections
642 * and set the Module* specifying where the query came from to NULL. If the query has already
643 * been dispatched then when it is processed it will be dropped if the pointer is NULL.
645 * If the queries we find are not already being executed then we can simply remove them immediately.
647 for(ConnMap::iterator iter = connections.begin(); iter != connections.end(); iter++)
649 iter->second->OnUnloadModule(mod);
653 unsigned long NewID()
661 virtual Version GetVersion()
663 return Version(1, 1, 0, 0, VF_VENDOR|VF_SERVICEPROVIDER, API_VERSION);
666 virtual ~ModulePgSQL()
672 SQLConn::SQLConn(InspIRCd* SI, ModulePgSQL* self, const SQLhost& hi)
673 : InspSocket::InspSocket(SI), us(self), dbhost(hi.host), dbport(hi.port), dbname(hi.name), dbuser(hi.user), dbpass(hi.pass), ssl(hi.ssl), sql(NULL), status(CWRITE), qinprog(false)
675 //ServerInstance->Log(DEBUG, "Creating new PgSQL connection to database %s on %s:%u (%s/%s)", dbname.c_str(), dbhost.c_str(), dbport, dbuser.c_str(), dbpass.c_str());
677 /* Some of this could be reviewed, unsure if I need to fill 'host' etc...
678 * just copied this over from the InspSocket constructor.
680 strlcpy(this->host, dbhost.c_str(), MAXBUF);
681 strlcpy(this->IP, dbhost.c_str(), MAXBUF);
683 idle = this->Instance->Time();
685 this->ClosePending = false;
687 Instance->Log(DEBUG,"No need to resolve %s", this->host);
690 if(!this->DoConnect())
692 throw ModuleException("Connect failed");
701 bool SQLConn::DoConnect()
703 //ServerInstance->Log(DEBUG, "SQLConn::DoConnect()");
705 if(!(sql = PQconnectStart(MkInfoStr().c_str())))
707 Instance->Log(DEBUG, "Couldn't allocate PGconn structure, aborting: %s", PQerrorMessage(sql));
712 if(PQstatus(sql) == CONNECTION_BAD)
714 Instance->Log(DEBUG, "PQconnectStart failed: %s", PQerrorMessage(sql));
721 if(PQsetnonblocking(sql, 1) == -1)
723 Instance->Log(DEBUG, "Couldn't set connection nonblocking: %s", PQerrorMessage(sql));
728 /* OK, we've initalised the connection, now to get it hooked into the socket engine
729 * and then start polling it.
732 //ServerInstance->Log(DEBUG, "Old DNS socket: %d", this->fd);
733 this->fd = PQsocket(sql);
734 Instance->Log(DEBUG, "New SQL socket: %d", this->fd);
738 Instance->Log(DEBUG, "PQsocket says we have an invalid FD: %d", this->fd);
743 this->state = I_CONNECTING;
744 if (!this->Instance->SE->AddFd(this))
746 Instance->Log(DEBUG, "A PQsocket cant be added to the socket engine!");
751 /* Socket all hooked into the engine, now to tell PgSQL to start connecting */
756 void SQLConn::Close()
758 Instance->Log(DEBUG,"SQLConn::Close");
761 this->state = I_ERROR;
762 this->OnError(I_ERR_SOCKET);
763 this->ClosePending = true;
774 bool SQLConn::DoPoll()
776 switch(PQconnectPoll(sql))
778 case PGRES_POLLING_WRITING:
779 //ServerInstance->Log(DEBUG, "PGconnectPoll: PGRES_POLLING_WRITING");
783 case PGRES_POLLING_READING:
784 //ServerInstance->Log(DEBUG, "PGconnectPoll: PGRES_POLLING_READING");
787 case PGRES_POLLING_FAILED:
788 //ServerInstance->Log(DEBUG, "PGconnectPoll: PGRES_POLLING_FAILED: %s", PQerrorMessage(sql));
790 case PGRES_POLLING_OK:
791 //ServerInstance->Log(DEBUG, "PGconnectPoll: PGRES_POLLING_OK");
793 return DoConnectedPoll();
795 //ServerInstance->Log(DEBUG, "PGconnectPoll: wtf?");
800 bool SQLConn::DoConnectedPoll()
802 if(!qinprog && queue.totalsize())
804 /* There's no query currently in progress, and there's queries in the queue. */
805 SQLrequest& query = queue.front();
809 if(PQconsumeInput(sql))
811 Instance->Log(DEBUG, "PQconsumeInput succeeded");
813 /* We just read stuff from the server, that counts as it being alive
814 * so update the idle-since time :p
816 idle = this->Instance->Time();
820 //ServerInstance->Log(DEBUG, "Still busy processing command though");
824 //ServerInstance->Log(DEBUG, "Looks like we have a result to process!");
826 /* Grab the request we're processing */
827 SQLrequest& query = queue.front();
829 Instance->Log(DEBUG, "ID is %lu", query.id);
831 /* Get a pointer to the module we're about to return the result to */
832 Module* to = query.GetSource();
834 /* Fetch the result.. */
835 PGresult* result = PQgetResult(sql);
837 /* PgSQL would allow a query string to be sent which has multiple
838 * queries in it, this isn't portable across database backends and
839 * we don't want modules doing it. But just in case we make sure we
840 * drain any results there are and just use the last one.
841 * If the module devs are behaving there will only be one result.
843 while (PGresult* temp = PQgetResult(sql))
851 /* ..and the result */
852 PgSQLresult reply(us, to, query.id, result);
854 /* Fix by brain, make sure the original query gets sent back in the reply */
855 reply.query = query.query.q;
857 Instance->Log(DEBUG, "Got result, status code: %s; error message: %s", PQresStatus(PQresultStatus(result)), PQresultErrorMessage(result));
859 switch(PQresultStatus(result))
861 case PGRES_EMPTY_QUERY:
862 case PGRES_BAD_RESPONSE:
863 case PGRES_FATAL_ERROR:
864 reply.error.Id(QREPLY_FAIL);
865 reply.error.Str(PQresultErrorMessage(result));
867 /* No action, other values are not errors */
872 /* PgSQLresult's destructor will free the PGresult */
876 /* If the client module is unloaded partway through a query then the provider will set
877 * the pointer to NULL. We cannot just cancel the query as the result will still come
878 * through at some point...and it could get messy if we play with invalid pointers...
880 Instance->Log(DEBUG, "Looks like we're handling a zombie query from a module which unloaded before it got a result..fun. ID: %lu", query.id);
890 Instance->Log(DEBUG, "Eh!? We just got a read event, and connection isn't busy..but no result :(");
897 /* I think we'll assume this means the server died...it might not,
898 * but I think that any error serious enough we actually get here
899 * deserves to reconnect [/excuse]
900 * Returning true so the core doesn't try and close the connection.
902 Instance->Log(DEBUG, "PQconsumeInput failed: %s", PQerrorMessage(sql));
908 bool SQLConn::DoResetPoll()
910 switch(PQresetPoll(sql))
912 case PGRES_POLLING_WRITING:
913 //ServerInstance->Log(DEBUG, "PGresetPoll: PGRES_POLLING_WRITING");
917 case PGRES_POLLING_READING:
918 //ServerInstance->Log(DEBUG, "PGresetPoll: PGRES_POLLING_READING");
921 case PGRES_POLLING_FAILED:
922 //ServerInstance->Log(DEBUG, "PGresetPoll: PGRES_POLLING_FAILED: %s", PQerrorMessage(sql));
924 case PGRES_POLLING_OK:
925 //ServerInstance->Log(DEBUG, "PGresetPoll: PGRES_POLLING_OK");
927 return DoConnectedPoll();
929 //ServerInstance->Log(DEBUG, "PGresetPoll: wtf?");
934 void SQLConn::ShowStatus()
936 switch(PQstatus(sql))
938 case CONNECTION_STARTED:
939 Instance->Log(DEBUG, "PQstatus: CONNECTION_STARTED: Waiting for connection to be made.");
942 case CONNECTION_MADE:
943 Instance->Log(DEBUG, "PQstatus: CONNECTION_MADE: Connection OK; waiting to send.");
946 case CONNECTION_AWAITING_RESPONSE:
947 Instance->Log(DEBUG, "PQstatus: CONNECTION_AWAITING_RESPONSE: Waiting for a response from the server.");
950 case CONNECTION_AUTH_OK:
951 Instance->Log(DEBUG, "PQstatus: CONNECTION_AUTH_OK: Received authentication; waiting for backend start-up to finish.");
954 case CONNECTION_SSL_STARTUP:
955 Instance->Log(DEBUG, "PQstatus: CONNECTION_SSL_STARTUP: Negotiating SSL encryption.");
958 case CONNECTION_SETENV:
959 Instance->Log(DEBUG, "PQstatus: CONNECTION_SETENV: Negotiating environment-driven parameter settings.");
963 Instance->Log(DEBUG, "PQstatus: ???");
967 bool SQLConn::OnDataReady()
969 /* Always return true here, false would close the socket - we need to do that ourselves with the pgsql API */
970 Instance->Log(DEBUG, "OnDataReady(): status = %s", StatusStr());
975 bool SQLConn::OnWriteReady()
977 /* Always return true here, false would close the socket - we need to do that ourselves with the pgsql API */
978 Instance->Log(DEBUG, "OnWriteReady(): status = %s", StatusStr());
983 bool SQLConn::OnConnected()
985 Instance->Log(DEBUG, "OnConnected(): status = %s", StatusStr());
990 bool SQLConn::Reconnect()
992 Instance->Log(DEBUG, "Initiating reconnect");
994 if(PQresetStart(sql))
996 /* Successfully initiatied database reconnect,
997 * set flags so PQresetPoll() will be called appropriately
1005 Instance->Log(DEBUG, "Failed to initiate reconnect...fun");
1010 bool SQLConn::DoEvent()
1014 if((status == CREAD) || (status == CWRITE))
1018 else if((status == RREAD) || (status == RWRITE))
1020 ret = DoResetPoll();
1024 ret = DoConnectedPoll();
1027 switch(PQflush(sql))
1030 Instance->Log(DEBUG, "Error flushing write queue: %s", PQerrorMessage(sql));
1033 Instance->Log(DEBUG, "Successfully flushed write queue (or there was nothing to write)");
1036 Instance->Log(DEBUG, "Not all of the write queue written, triggering write event so we can have another go");
1044 std::string SQLConn::MkInfoStr()
1046 std::ostringstream conninfo("connect_timeout = '2'");
1049 conninfo << " hostaddr = '" << dbhost << "'";
1052 conninfo << " port = '" << dbport << "'";
1055 conninfo << " dbname = '" << dbname << "'";
1058 conninfo << " user = '" << dbuser << "'";
1061 conninfo << " password = '" << dbpass << "'";
1064 conninfo << " sslmode = 'require'";
1066 return conninfo.str();
1069 const char* SQLConn::StatusStr()
1071 if(status == CREAD) return "CREAD";
1072 if(status == CWRITE) return "CWRITE";
1073 if(status == WREAD) return "WREAD";
1074 if(status == WWRITE) return "WWRITE";
1075 return "Err...what, erm..BUG!";
1078 SQLerror SQLConn::DoQuery(SQLrequest &req)
1080 if((status == WREAD) || (status == WWRITE))
1084 /* Parse the command string and dispatch it */
1086 /* Pointer to the buffer we screw around with substitution in */
1088 /* Pointer to the current end of query, where we append new stuff */
1090 /* Total length of the unescaped parameters */
1091 unsigned int paramlen;
1095 for(ParamL::iterator i = req.query.p.begin(); i != req.query.p.end(); i++)
1097 paramlen += i->size();
1100 /* To avoid a lot of allocations, allocate enough memory for the biggest the escaped query could possibly be.
1101 * sizeofquery + (totalparamlength*2) + 1
1103 * The +1 is for null-terminating the string for PQsendQuery()
1106 query = new char[req.query.q.length() + (paramlen*2)];
1109 /* Okay, now we have a buffer large enough we need to start copying the query into it and escaping and substituting
1110 * the parameters into it...
1113 for(unsigned int i = 0; i < req.query.q.length(); i++)
1115 if(req.query.q[i] == '?')
1117 /* We found a place to substitute..what fun.
1118 * Use the PgSQL calls to escape and write the
1119 * escaped string onto the end of our query buffer,
1120 * then we "just" need to make sure queryend is
1121 * pointing at the right place.
1124 if(req.query.p.size())
1129 #ifdef PGSQL_HAS_ESCAPECONN
1130 len = PQescapeStringConn(sql, queryend, req.query.p.front().c_str(), req.query.p.front().length(), &error);
1132 len = PQescapeString (queryend, req.query.p.front().c_str(), req.query.p.front().length());
1136 Instance->Log(DEBUG, "Apparently PQescapeStringConn() failed somehow...don't know how or what to do...");
1139 Instance->Log(DEBUG, "Appended %d bytes of escaped string onto the query", len);
1141 /* Incremenet queryend to the end of the newly escaped parameter */
1144 /* Remove the parameter we just substituted in */
1145 req.query.p.pop_front();
1149 Instance->Log(DEBUG, "Found a substitution location but no parameter to substitute :|");
1155 *queryend = req.query.q[i];
1160 /* Null-terminate the query */
1163 Instance->Log(DEBUG, "Attempting to dispatch query: %s", query);
1165 req.query.q = query;
1167 if(PQsendQuery(sql, query))
1169 Instance->Log(DEBUG, "Dispatched query successfully");
1176 Instance->Log(DEBUG, "Failed to dispatch query: %s", PQerrorMessage(sql));
1178 return SQLerror(QSEND_FAIL, PQerrorMessage(sql));
1183 Instance->Log(DEBUG, "Can't query until connection is complete");
1184 return SQLerror(BAD_CONN, "Can't query until connection is complete");
1187 SQLerror SQLConn::Query(const SQLrequest &req)
1191 if(!qinprog && queue.totalsize())
1193 /* There's no query currently in progress, and there's queries in the queue. */
1194 SQLrequest& query = queue.front();
1195 return DoQuery(query);
1203 void SQLConn::OnUnloadModule(Module* mod)
1205 queue.PurgeModule(mod);
1208 void SQLresolver::OnLookupComplete(const std::string &result)
1214 class ModulePgSQLFactory : public ModuleFactory
1217 ModulePgSQLFactory()
1221 ~ModulePgSQLFactory()
1225 virtual Module * CreateModule(InspIRCd* Me)
1227 return new ModulePgSQL(Me);
1232 extern "C" void * init_module( void )
1234 return new ModulePgSQLFactory;