/// <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);
}
