IISLogParser 1.2.0

This library allows the import and parsing of IIS log files from the filesystem to a List <IISLogEvent>. This project arose from the need to have a component that allows both the import of small log files as well as larger files (> 1Gb).

Build with NET Standard 2.0.3, can be used with .Net Framework or .Net Core

Processing

The processing engine detects the size of the file to be processed and if it is less than 50 Mb it does a single read to memory and treats the data from there, for larger files to avoid OutOfMemory, reading is done line by line.

Properties

FilePath [string] → Path to the file

MissingRecords [bool] → Flag that indicates if there are any missing records. For larger files, this property can be flagged as true.

CurrentFileRecord [int] → When processing large files this will store the currently file record index. For example, if the file has 1.000.000 log events and the processing is done in blocks of 250000(MaxFileRecord2Read), we'll have 4 cycles each on with this flag set with 250.000, 500.000, 750.000 and finally 1.000.000

MaxFileRecord2Read [int] → Controls the maximum limit of items that the <IISLogEvent> List can have. If the number of events in the log file exceeds MaxFileRecord2Read the MissingRecords variable assumes the value of true and we can perform one more reading of a MaxFileRecord2Read set. For files less than 50Mb this value has no effect because the engine performs a single read to memory and treats the data from there. For example, if the file has 1.000.000 log events and this is set to 250.000, will perform 4 cycle each one extracting a List<IISLogEvent> with a count of 250.000

Usage :

        List<IISLogEvent> logs = new List<IISLogEvent>();
        using (ParserEngine parser = new ParserEngine([filepath]))
        {
            while (parser.MissingRecords)
            {
                logs = parser.ParseLog().ToList();
            }
        }