Edit2: I just want to make sure my question is clear: Why, on each iteration of AppendToLog(), the application uses 15mb more? (the size of the original log file)
I've got a function called AppendToLog() which receives the file path of an HTML document, does some parsing and appends it to a file. It gets called this way:
this.user_email = uemail;
string wanted_user = wemail;
string[] logPaths;
logPaths = this.getLogPaths(wanted_user);
foreach (string path in logPaths)
{
this.AppendToLog(path);
}
On every iteration, the RAM usage increases by 15mb or so. This is the function: (looks long but it's simple)
public void AppendToLog(string path)
{
Encoding enc = Encoding.GetEncoding("ISO-8859-2");
StringBuilder fb = new StringBuilder();
FileStream sourcef;
string[] messages;
try
{
sourcef = new FileStream(path, FileMode.Open);
}
catch (IOException)
{
throw new IOException("The chat log is in use by another process."); ;
}
using (StreamReader sreader = new StreamReader(sourcef, enc))
{
string file_buffer;
while ((file_buffer = sreader.ReadLine()) != null)
{
fb.Append(file_buffer);
}
}
//Array of each line's content
messages = parseMessages(fb.ToString());
fb = null;
string destFileName = String.Format("{0}_log.txt",System.IO.Path.GetFileNameWithoutExtension(path));
FileStream destf = new FileStream(destFileName, FileMode.Append);
using (StreamWriter swriter = new StreamWriter(destf, enc))
{
foreach (string message in messages)
{
if (message != null)
{
swriter.WriteLine(message);
}
}
}
messages = null;
sourcef.Dispose();
destf.Dispose();
sourcef = null;
destf = null;
}
I've been days with this and I don't know what to do :(
Edit: This is ParseMessages, a function that uses HtmlAgilityPack to strip parts of an HTML log.
public string[] parseMessages(string what)
{
StringBuilder sb = new StringBuilder();
HtmlDocument doc = new HtmlDocument();
doc.LoadHtml(what);
HtmlNodeCollection messageGroups = doc.DocumentNode.SelectNodes("//body/div[@class='mplsession']");
int messageCount = doc.DocumentNode.SelectNodes("//tbody/tr").Count;
doc = null;
string[] buffer = new string[messageCount];
int i = 0;
foreach (HtmlNode sessiongroup in messageGroups)
{
HtmlNode tablegroup = sessiongroup.SelectSingleNode("table/tbody");
string sessiontime = sessiongroup.Attributes["id"].Value;
HtmlNodeCollection messages = tablegroup.SelectNodes("tr");
if (messages != null)
{
foreach (HtmlNode htmlNode in messages)
{
sb.Append(
ParseMessageDate(
sessiontime,
htmlNode.ChildNodes[0].ChildNodes[0].InnerText
)
); //Date
sb.Append(" ");
try
{
foreach (HtmlTextNode node in htmlNode.ChildNodes[0].SelectNodes("text()"))
{
sb.Append(node.Text.Trim()); //Name
}
}
catch (NullReferenceException)
{
/*
* We ignore this exception, it just means there's extra text
* and that means that it's not a normal message
* but a system message instead
* (i.e. "John logged off")
* Therefore we add the "::" mark for future organizing
*/
sb.Append("::");
}
sb.Append(" ");
string message = htmlNode.ChildNodes[1].InnerHtml;
message = message.Replace(""", "'");
message = message.Replace(" ", " ");
message = RemoveMedia(message);
sb.Append(message); //Message
buffer[i] = sb.ToString();
sb = new StringBuilder();
i++;
}
}
}
messageGroups = null;
what = null;
return buffer;
}