/// <summary>
/// Accept a V3 request URI and return a V4 request URI. V4 request URI retains base path.
/// </summary>
/// <param name="requestUri">V3 Request URI</param>
/// <returns>V4 Request URI</returns>
public Uri TranslateUri(Uri requestUri)
{
// Use UriTranslator to walk v3 segments, translating each to v4 and returning.
ODataPath v3path = new ODataUriParser(this.v3Model, this.serviceRoot).ParsePath(requestUri);
UriSegmentTranslator uriTranslator = new UriSegmentTranslator(this.v4Model);
Microsoft.OData.UriParser.ODataPath v4path = new Microsoft.OData.UriParser.ODataPath(v3path.WalkWith(uriTranslator));
// Parse query options for translation
NameValueCollection requestQuery = HttpUtility.ParseQueryString(requestUri.Query);
// Create a v4 ODataUri and utilized ODataUriExtensions methods to build v4 URI
Microsoft.OData.ODataUri v4Uri = new Microsoft.OData.ODataUri()
{
Path = v4path,
Filter = ParseFilterFromQueryOrNull(requestQuery, v4path, v3path)
};
Uri v4RelativeUri = Microsoft.OData.ODataUriExtensions.BuildUri(v4Uri, Microsoft.OData.ODataUrlKeyDelimiter.Parentheses);
Uri v4FullUri = new Uri(serviceRoot, v4RelativeUri);
// Translated query only contains translated filter clause
// We need to move everything from v3 query that does not require translation to v4 query
NameValueCollection translatedQuery = HttpUtility.ParseQueryString(v4FullUri.Query);
// Copy values from requestQuery to new translated query. Iterate with multiple loops
// because NameValueCollections also support multiple values to one key
foreach (string k in requestQuery)
{
foreach (string v in requestQuery.GetValues(k))
{
string key = k.Trim();
if (key == "$inlinecount")
{
translatedQuery["$count"] = ParseInlineCountFromQuery(v.Trim());
}
else if (key != "$filter")
{
translatedQuery[k] = v;
}
}
}
UriBuilder builder = new UriBuilder(serviceRoot.Scheme, serviceRoot.Host, serviceRoot.Port, v4FullUri.AbsolutePath);
// NameValueCollection ToString is overriden to produce a URL-encoded string, decode it to maintain consistency
builder.Query = WebUtility.UrlDecode(translatedQuery.ToString());
return(builder.Uri);
}
