public IEnumerable <string> BuildConditions(
Rewrite rewrite)
{
if (rewrite.OldUrlHasHost &&
!string.IsNullOrEmpty(rewrite.OldUrl.Host))
{
yield return(string.Format(
"<add input=\"{{HTTP_HOST}}\" pattern=\"^{0}$\" />",
rewrite.OldUrl.Host));
}
if (rewrite.RelatedRewrites.Count > 1)
{
yield return(!string.IsNullOrWhiteSpace(rewrite.OldUrl.Query)
? string.Format(
"<add input=\"{{{0}:{{QUERY_STRING}}}}\" pattern=\"(.+)\" />",
rewrite.Id)
: string.Format(
"<add input=\"{{{0}:{{R:1}}}}\" pattern=\"(.+)\" />",
rewrite.Id));
}
else if (!string.IsNullOrEmpty(rewrite.OldUrl.Query))
{
yield return(string.Format(
"<add input=\"{{QUERY_STRING}}\" pattern=\"{0}\" />",
rewrite.OldUrl.Query));
}
}
private string BuildRedirectUrl(
Rewrite rewrite)
{
var useRewriteMap =
rewrite.RelatedRewrites.Count > 1;
var host = rewrite.NewUrlHasHost
? string.Format("{0}://{1}", rewrite.NewUrl.Scheme, rewrite.NewUrl.Host)
: "";
var replaceRemainingPath =
rewrite.RedirectType == RedirectType.Replace
? useRewriteMap ? "{R:2}" : "{R:1}"
: string.Empty;
var pathAndQuery = FormatNewPathAndQuery(
string.Concat(
useRewriteMap ? "{C:1}" : rewrite.NewUrl.Path,
replaceRemainingPath),
rewrite.NewUrl.Query);
return(string.Concat(
host,
pathAndQuery));
}
private string BuildExactMatchUrl(
Rewrite rewrite)
{
var useRewriteMap =
rewrite.RelatedRewrites.Count > 1;
return(rewrite.OldUrlHasRootPath
? "^/?$"
: rewrite.RelatedRewrites.Count <= 1 || !string.IsNullOrWhiteSpace(rewrite.OldUrl.Query)
? string.Format("^{0}/?$", FormatOldPath(rewrite.OldUrl.Path))
: "^(.+?)/?$");
}
private string BuildMatchUrl(Rewrite rewrite)
{
switch (rewrite.RedirectType)
{
case RedirectType.Exact:
return(BuildExactMatchUrl(rewrite));
case RedirectType.Replace:
return(BuildReplaceMatchUrl(rewrite));
}
return(".+");
}
private string BuildReplaceMatchUrl(
Rewrite rewrite)
{
var useRewriteMap =
rewrite.RelatedRewrites.Count > 1;
var segments = rewrite.OldUrl.Path.Split('/').Length - 1;
var path = rewrite.OldUrlHasRootPath
? string.Empty
: FormatOldPath(rewrite.OldUrl.Path);
return(string.Format(
"^{0}(.+)?/?$",
useRewriteMap
? string.Format(
"({0})",
string.Join(
"/",
Enumerable.Repeat("[^/]+", segments)))
: path));
}