From d7c7c961e8c35c2d8587ec7f60aac5e309284a97 Mon Sep 17 00:00:00 2001
From: deva <deva>
Date: Fri, 13 Nov 2009 11:00:08 +0000
Subject: Added SessionIDs to http communication. Made SAXParser run on const
 char*.

---
 server/src/server.cc | 48 ++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 38 insertions(+), 10 deletions(-)

(limited to 'server/src/server.cc')

diff --git a/server/src/server.cc b/server/src/server.cc
index 67ae74d..d1104c4 100644
--- a/server/src/server.cc
+++ b/server/src/server.cc
@@ -60,9 +60,12 @@
 #include "templatelist.h"
 #include "versionstr.h"
 
+typedef long long unsigned int sessionid_t;
+
 struct conn_t {
   Database *db;
-  
+  sessionid_t sessionid;
+  bool commit;
 };
 
 static std::string error_box(std::string message)
@@ -88,7 +91,8 @@ public:
 };
 
 
-static std::string handleCommits(Transaction *transaction, Database &db, 
+static std::string handleCommits(sessionid_t sessiondid,
+                                 Transaction *transaction, Database &db, 
                                  JournalWriter &journalwriter, MacroList &macrolist,
                                  TemplateList &templatelist)
 {
@@ -125,7 +129,6 @@ static std::string handleCommits(Transaction *transaction, Database &db,
 static std::string handleRequest(Transaction *transaction,
                                  TCPSocket &pentominos_socket,
                                  Database &db,
-                                 JournalWriter &journalwriter,
                                  MacroList &macrolist,
                                  TemplateList &templatelist)
 {
@@ -267,7 +270,8 @@ static std::string handleRequest(Transaction *transaction,
   return answer;
 }
 
-static std::string handleTransaction(Transaction *transaction,
+static std::string handleTransaction(sessionid_t sessionid,
+                                     Transaction *transaction,
                                      TCPSocket &pentominos_socket,
                                      Database &db,
                                      JournalWriter &journalwriter,
@@ -279,15 +283,15 @@ static std::string handleTransaction(Transaction *transaction,
   answer += "<pracro version=\"1.0\">\n";
 
   try {
-    answer += handleCommits(transaction, db, journalwriter, macrolist, templatelist);
+    answer += handleCommits(sessionid, transaction, db,
+                            journalwriter, macrolist, templatelist);
   } catch( std::exception &e ) {
     PRACRO_ERR(server, "Commit error: %s\n", e.what());
     return error_box(xml_encode(e.what()));
   }
 
   try {
-    answer += handleRequest(transaction, pentominos_socket, db, journalwriter,
-                            macrolist, templatelist);
+    answer += handleRequest(transaction, pentominos_socket, db, macrolist, templatelist);
   } catch( std::exception &e ) {
     PRACRO_ERR(server, "Request error: %s\n", e.what());
     return error_box(xml_encode(e.what()));
@@ -301,7 +305,7 @@ static std::string handleTransaction(Transaction *transaction,
 }
 
 
-static std::string handleConnection(char *buf, size_t size, struct conn_t *conn)
+static std::string handleConnection(const char *buf, size_t size, struct conn_t *conn)
 {
   if(size == 0) 
     return error_box(xml_encode("Empty document received."));
@@ -324,7 +328,7 @@ static std::string handleConnection(char *buf, size_t size, struct conn_t *conn)
   if(parser.parse(buf, size)) {
     PRACRO_DEBUG(server, "Got complete XML document, %d bytes in current buffer.\n", size);
 
-    std::string res = handleTransaction(&transaction, pentominos_socket,
+    std::string res = handleTransaction(conn->sessionid, &transaction, pentominos_socket,
                                         *conn->db, journalwriter, macrolist, templatelist);
     journalwriter.commit();
 
@@ -335,6 +339,12 @@ static std::string handleConnection(char *buf, size_t size, struct conn_t *conn)
   return error_box(xml_encode("XML Parse error."));
 }
 
+static sessionid_t newSessionID()
+{
+  static volatile sessionid_t sessionid = 0;
+  return sessionid++;
+}
+
 static int handle_request(void *cls,
                           struct MHD_Connection *con,
                           const char *url,
@@ -351,11 +361,29 @@ static int handle_request(void *cls,
                " version=\"%s\", data_size=\"%d\")\n",
                url, method, version, *data_size);
 
-  std::string reply = handleConnection((char*)data, *data_size, conn);
+  const char *sessionids = MHD_lookup_connection_value(con, MHD_HEADER_KIND, "SessionID");
+  if(sessionids == NULL) conn->sessionid = newSessionID();
+  else conn->sessionid = atoll(sessionids);
+  printf("SessionID: %llu\n", conn->sessionid);
+
+  const char *session_commit = MHD_lookup_connection_value(con, MHD_HEADER_KIND, "SessionCommit");
+  if(session_commit) {
+    printf("COMMIT: sessionid %llu\n", conn->sessionid);
+    conn->commit = true;
+  } else {
+    conn->commit = false;
+  }
+
+  std::string reply = handleConnection(data, *data_size, conn);
   
   struct MHD_Response *rsp;
   rsp = MHD_create_response_from_data(reply.length(), (char*)reply.c_str(), MHD_NO, MHD_YES);
   MHD_add_response_header(rsp, MHD_HTTP_HEADER_CONTENT_TYPE, "text/plain; charset=UTF-8");
+
+  char idbuf[32];
+  snprintf(idbuf, sizeof(idbuf), "%llu", conn->sessionid);
+  MHD_add_response_header(rsp, "SessionID", idbuf);
+
   int ret = MHD_queue_response(con, MHD_HTTP_OK, rsp);
   MHD_destroy_response(rsp);
 
-- 
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