MGR: If Firefox 3 SQL query fails because cookie database is locked, make a temporary copy of the cookie file and query that

svn path=/trunk/boinc/; revision=23629

checkin_notes

@@ -3237,3 +3237,11 @@ Charlie 2 Jun 2011
     mac_build/
         boinc.xcodeproj/
             project.pbxproj
+
+Charlie 2 Jun 2011
+    - MGR: If Firefox 3 SQL query fails because cookie database is locked, 
+        make a temporary copy of the cookie file and query that.  This works 
+        around a bug in some builds of Firefox 3.5.x.
+        
+    clientgui/
+        browser.cpp

clientgui/browser.cpp

@@ -30,6 +30,7 @@
 #include "mfile.h"
 #include "miofile.h"
 #include "str_util.h"
+#include "filesys.h"
 #include "browser.h"
 
 
@@ -600,7 +601,9 @@ bool detect_cookie_mozilla_v3(
     std::string profile_root, std::string& project_url, std::string& name, std::string& value
 ) {
     bool        retval = false;
-    std::string tmp;
+    bool        firstpass = true;
+    std::string cookieFilePath;
+    std::string cookieCopyFilePath;
     std::string hostname;
     char        query[1024];
     sqlite3*    db;
@@ -618,11 +621,13 @@ bool detect_cookie_mozilla_v3(
 
 
     // now we should open up the cookie database.
-    tmp = profile_root + "cookies.sqlite";
-    rc = sqlite3_open(tmp.c_str(), &db);
+    cookieFilePath = profile_root + "cookies.sqlite";
+retry:
+    rc = sqlite3_open(cookieFilePath.c_str(), &db);
     if ( rc ) {
         sqlite3_close(db);
-        return false;
+        retval = false;
+        goto cleanUpCopy;
     }
     
     // construct SQL query to extract the desired cookie
@@ -642,11 +647,28 @@ bool detect_cookie_mozilla_v3(
     // cleanup
     sqlite3_close(db);
 
+    if (((rc == SQLITE_BUSY) || (rc == SQLITE_LOCKED)) && firstpass) {
+        firstpass = false;
+        cookieCopyFilePath = profile_root + "boinc_cookies.sqlite";
+        rc = boinc_copy(cookieFilePath.c_str(), cookieCopyFilePath.c_str());
+        if (rc) {
+            retval = false;
+            goto cleanUpCopy;
+        }
+        cookieFilePath = cookieCopyFilePath;
+        goto retry;
+    }
+    
     if ( !cookie.value.empty() ) {
         value = cookie.value;
         retval = true;
     }
 
+cleanUpCopy:
+    if (!firstpass) {
+        boinc_delete_file(cookieCopyFilePath.c_str());
+    }
+
     return retval;
 }