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authorom <om@e03df62e-2008-0410-955e-edbf42e46eb7>2006-07-21 12:39:42 +0000
committerom <om@e03df62e-2008-0410-955e-edbf42e46eb7>2006-07-21 12:39:42 +0000
commite491d292c062c9889314a9803692991d8553a3ca (patch)
tree9890011a18a31e88a44cdc66c238211505ad0787 /src
parentcbaa580e464f60e0615fb94f410598833d771adf (diff)
Implemenet parameter substitution (damn sexy if you ask me..)
git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@4474 e03df62e-2008-0410-955e-edbf42e46eb7
Diffstat (limited to 'src')
-rw-r--r--src/modules/extra/m_pgsql.cpp104
1 files changed, 79 insertions, 25 deletions
diff --git a/src/modules/extra/m_pgsql.cpp b/src/modules/extra/m_pgsql.cpp
index c7feb2a22..433d02aea 100644
--- a/src/modules/extra/m_pgsql.cpp
+++ b/src/modules/extra/m_pgsql.cpp
@@ -431,7 +431,7 @@ public:
const char* StatusStr();
- SQLerror DoQuery(const SQLrequest &req);
+ SQLerror DoQuery(SQLrequest &req);
SQLerror Query(const SQLrequest &req);
@@ -935,7 +935,7 @@ const char* SQLConn::StatusStr()
return "Err...what, erm..BUG!";
}
-SQLerror SQLConn::DoQuery(const SQLrequest &req)
+SQLerror SQLConn::DoQuery(SQLrequest &req)
{
if((status == WREAD) || (status == WWRITE))
{
@@ -943,45 +943,99 @@ SQLerror SQLConn::DoQuery(const SQLrequest &req)
{
/* Parse the command string and dispatch it */
- /* A list of offsets into the original string of the '?' characters we're substituting */
- std::vector<unsigned int> insertlocs;
+ /* Pointer to the buffer we screw around with substitution in */
+ char* query;
+ /* Pointer to the current end of query, where we append new stuff */
+ char* queryend;
+ /* Total length of the unescaped parameters */
+ unsigned int paramlen;
+
+ paramlen = 0;
+
+ for(ParamL::iterator i = req.query.p.begin(); i != req.query.p.end(); i++)
+ {
+ paramlen += i->size();
+ }
+
+ /* To avoid a lot of allocations, allocate enough memory for the biggest the escaped query could possibly be.
+ * sizeofquery + (totalparamlength*2) + 1
+ *
+ * The +1 is for null-terminating the string for PQsendQuery()
+ */
+
+ query = new char[req.query.q.length() + (paramlen*2)];
+ queryend = query;
+
+ /* Okay, now we have a buffer large enough we need to start copying the query into it and escaping and substituting
+ * the parameters into it...
+ */
for(unsigned int i = 0; i < req.query.q.length(); i++)
{
if(req.query.q[i] == '?')
{
- insertlocs.push_back(i);
- }
- }
-
- char* query = new char[(req.query.q.length()*2)+1];
- int error = 0;
+ /* We found a place to substitute..what fun.
+ * Use the PgSQL calls to escape and write the
+ * escaped string onto the end of our query buffer,
+ * then we "just" need to make sure queryend is
+ * pointing at the right place.
+ */
+
+ if(req.query.p.size())
+ {
+ int error = 0;
+ size_t len = 0;
#ifdef PGSQL_HAS_ESCAPECONN
- PQescapeStringConn(sql, query, req.query.q.c_str(), req.query.q.length(), &error);
+ len = PQescapeStringConn(sql, queryend, req.query.p.front().c_str(), req.query.p.front().length(), &error);
#else
- PQescapeString(query, req.query.q.c_str(), req.query.q.length());
- error = 0;
+ len = PQescapeStringConn(queryend, req.query.p.front().c_str(), req.query.p.front().length());
+ error = 0;
#endif
-
- if(error == 0)
- {
- if(PQsendQuery(sql, query))
- {
- log(DEBUG, "Dispatched query: %s", query);
- qinprog = true;
- return SQLerror();
+
+ if(error)
+ {
+ log(DEBUG, "Apparently PQescapeStringConn() failed somehow...don't know how or what to do...");
+ }
+
+ log(DEBUG, "Appended %d bytes of escaped string onto the query", len);
+
+ /* Incremenet queryend to the end of the newly escaped parameter */
+ queryend += len;
+
+ /* Remove the parameter we just substituted in */
+ req.query.p.pop_front();
+ }
+ else
+ {
+ log(DEBUG, "Found a substitution location but no parameter to substitute :|");
+ break;
+ }
}
else
{
- log(DEBUG, "Failed to dispatch query: %s", PQerrorMessage(sql));
- return SQLerror(QSEND_FAIL, PQerrorMessage(sql));
+ *queryend = req.query.q[i];
+ queryend++;
}
}
+
+ /* Null-terminate the query */
+ *queryend = 0;
+
+ log(DEBUG, "Attempting to dispatch query: %s", query);
+
+ if(PQsendQuery(sql, query))
+ {
+ log(DEBUG, "Dispatched query successfully");
+ qinprog = true;
+ DELETE(query);
+ return SQLerror();
+ }
else
{
- log(DEBUG, "Failed to escape query string");
- return SQLerror(QSEND_FAIL, "Couldn't escape query string");
+ log(DEBUG, "Failed to dispatch query: %s", PQerrorMessage(sql));
+ DELETE(query);
+ return SQLerror(QSEND_FAIL, PQerrorMessage(sql));
}
}
}