public void LinesDiff()
{
string text1 = "LineLine1.1\r\n" +
"eniLLine1.3\r\n" +
"ABC1.4";
string text2 = "LineLine2.1\r\n" +
"XYZ2.4\r\n" +
"eniLLine2.3";
LinesDiffer differ = new LinesDiffer();
DiffResult result = differ.DoDiff(text1, text2);
IDiffObjectsCollection firstDiffs = result.DifferencesForFirst;
IDiffObjectsCollection secondDiffs = result.DifferencesForSecond;
firstDiffs.SortByPosition();
secondDiffs.SortByPosition();
Assert.IsTrue(firstDiffs[0].ValueEquals(new LetterDiffObject(0, 0, "1")));
Assert.IsTrue(secondDiffs[0].ValueEquals(new LetterDiffObject(0, 0, "2")));
Assert.IsTrue(firstDiffs[1].ValueEquals(new LetterDiffObject(0, 0, "1")));
Assert.IsTrue(secondDiffs[1].ValueEquals(new LineDiffObject(0, 0, "XYZ2.4")));
Assert.IsTrue(firstDiffs[2].ValueEquals(new LineDiffObject(0, 0, "ABC1.4")));
Assert.IsTrue(secondDiffs[2].ValueEquals(new LetterDiffObject(0, 0, "2")));
}
/// <summary>
/// Diffs the response bodies
/// </summary>
/// <param name="result"></param>
/// <param name="firstResponse"></param>
/// <param name="secondResponse"></param>
/// <param name="firstRespBasePos"></param>
/// <param name="secondRespBasePos"></param>
/// <returns></returns>
private RequestsDifferResult DiffResponseBody(RequestsDifferResult result, string firstResponse, string secondResponse, int firstRespBasePos, int secondRespBasePos)
{
int firstResponseBodyStart = FindResponseBodyStart(firstResponse);
int secondResponseBodyStart = FindResponseBodyStart(secondResponse);
string firstResponseBody = firstResponse.Substring(firstResponseBodyStart);
string secondResponseBody = secondResponse.Substring(secondResponseBodyStart);
LinesDiffer linesDiffer = new LinesDiffer(); //this differ first compares the lines then the words then the letters
linesDiffer.Properties.Sorted = false;
linesDiffer.AddTask(firstResponseBody, firstRespBasePos + firstResponseBodyStart);
linesDiffer.AddTask(secondResponseBody, secondRespBasePos + secondResponseBodyStart);
result.BodyDiffSimilarity = linesDiffer.DoDiff();
//calculate aproximate similarity as generated by appscan algorithm
result.BodyAproximateSimilarity = ASESimilarityAlgorithm.CalculateSimilarity(firstResponseBody, secondResponseBody);
result = AppendDiffs(result, linesDiffer);
return(result);
}
/// <summary>
/// Executes a diff operation
/// </summary>
/// <param name="firstRequestId"></param>
/// <param name="secondRequestId"></param>
/// <param name="source"></param>
/// <returns></returns>
public RequestsDifferResult Diff(int firstRequestId, int secondRequestId, ITrafficDataAccessor source)
{
RequestsDifferResult result = null;
if (source.ContainsId(firstRequestId) && source.ContainsId(secondRequestId))
{
//first retrieve the requests
byte [] bytes1 = source.LoadRequestData(firstRequestId);
byte [] bytes2 = source.LoadRequestData(secondRequestId);
string firstRequest = String.Empty;
string secondRequest = String.Empty;
if (bytes1 != null)
{
firstRequest = GetString(bytes1);
}
if (bytes2 != null)
{
secondRequest = GetString(bytes2);
}
result = new RequestsDifferResult();
try //try to diff the request components
{
//diff the request line
result = DiffFirstLine(result, firstRequest, secondRequest, 0, 0);
//diff the request headers
result = DiffHeaders(result, firstRequest, secondRequest, 0, 0);
//next compare POST data if available
result = DiffPostData(result, firstRequest, secondRequest);
}
catch (DiffException) //if the request are malformed use a regular letters differ
{
LettersDiffer lettersDiffer = new LettersDiffer();
DiffResult lettersResult = lettersDiffer.DoDiff(firstRequest, secondRequest);
result.DiffsForFirst = lettersResult.DifferencesForFirst;
result.DiffsForSecond = lettersResult.DifferencesForSecond;
}
//done with the requests calculate the base position for the response
result.FirstText = firstRequest + "\n\n";
result.SecondText = secondRequest + "\n\n";
int firstRespBasePos = result.FirstText.Length;
int secondRespBasePos = result.SecondText.Length;
//load the responses
bytes1 = source.LoadResponseData(firstRequestId);
bytes2 = source.LoadResponseData(secondRequestId);
string firstResponse = String.Empty;
string secondResponse = String.Empty;
if (bytes1 != null)
{
firstResponse = GetString(bytes1);
}
if (bytes2 != null)
{
secondResponse = GetString(bytes2);
}
try
{
//diff the status line
result = DiffFirstLine(result, firstResponse, secondResponse, firstRespBasePos, secondRespBasePos);
//diff the request headers
result = DiffHeaders(result, firstResponse, secondResponse, firstRespBasePos, secondRespBasePos);
//diff the response body
result = DiffResponseBody(result, firstResponse, secondResponse, firstRespBasePos, secondRespBasePos);
}
catch (DiffException)
{
//if the responses are missing the headers use a regular lines differ
LinesDiffer linesDiffer = new LinesDiffer();
linesDiffer.AddTask(firstResponse, firstRespBasePos);
linesDiffer.AddTask(secondResponse, secondRespBasePos);
linesDiffer.DoDiff();
result.DiffsForFirst = linesDiffer.GetResultingDifferences(0);
result.DiffsForSecond = linesDiffer.GetResultingDifferences(1);
}
//append the responses to the result text
result.FirstText += firstResponse;
result.SecondText += secondResponse;
//sort and merge the resulting differences
result.DiffsForFirst.MergeAll();
result.DiffsForSecond.MergeAll();
}
return(result);
}