Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Net / System / UriScheme.cs / 1305376 / UriScheme.cs
//depot/DevDiv/private/Whidbey_Xws/ndp/fx/src/Net/System/UriScheme.cs#4 - edit change 914456 (text) /*++ Copyright (c) Microsoft Corporation Module Name: UriScheme.cs Abstract: Provides extensibility contract for System.Uri The contains only public API definition. For remaining internal stuff please refer to the _UriSyntax.cs file. Author: Alexei Vopilov 19-Dec-2003 Revision History: Alexei Vopilov 60-July-2004 - Changed the extensiblity model to be based purely on derivation, also has cut Config extensibility option --*/ namespace System { using System.Net; using System.Globalization; using System.Security.Permissions; // // The class is used as a base for custom uri parsing and derived Uri factoring. // A set of protected .ctors allows to hookup on the builtin parser behaviors. // // A developer must implement at least internal default .ctor to participate in the Uri extensibility game. // public abstract partial class UriParser { internal string SchemeName { get { return m_Scheme; } } internal int DefaultPort { get { return m_Port; } } private const UriSyntaxFlags SchemeOnlyFlags = UriSyntaxFlags.MayHavePath; // This is a "scheme-only" base parser, everything after the scheme is // returned as the path component. // The user parser will need to do the majority of the work itself. // // However when the ctor is called from OnCreateUri context the calling parser // settings will later override the result on the base class // protected UriParser(): this (SchemeOnlyFlags) { } // // Is called on each Uri ctor for every non-simple parser i.e. the one that does have // user code. // protected virtual UriParser OnNewUri() { return this; } // // Is called whenever a parser gets registered with some scheme // The base implementaion is a nop. // protected virtual void OnRegister(string schemeName, int defaultPort) { } // // Parses and validates a Uri object, is called at the Uri ctor time. // // This method returns a non null parsingError if Uri being created is invalid: // protected virtual void InitializeAndValidate(Uri uri, out UriFormatException parsingError) { parsingError = uri.ParseMinimal(); } // // Resolves a relative Uri object into new AbsoluteUri. // // baseUri - The baseUri used to resolve this Uri. // relativeuri - A relative Uri string passed by the application. // // This method returns: // The result Uri value used to represent a new Uri // protected virtual string Resolve(Uri baseUri, Uri relativeUri, out UriFormatException parsingError) { if (baseUri.UserDrivenParsing) throw new InvalidOperationException(SR.GetString(SR.net_uri_UserDrivenParsing, this.GetType().FullName)); if (!baseUri.IsAbsoluteUri) throw new InvalidOperationException(SR.GetString(SR.net_uri_NotAbsolute)); string newUriString = null; bool userEscaped = false; Uri result = Uri.ResolveHelper(baseUri, relativeUri, ref newUriString, ref userEscaped, out parsingError); if (parsingError != null) return null; if (result != null) return result.OriginalString; return newUriString; } // // // protected virtual bool IsBaseOf(Uri baseUri, Uri relativeUri) { return baseUri.IsBaseOfHelper(relativeUri); } // // This method is invoked to allow a cutsom parser to override the // internal parser when serving application with Uri componenet strings. // The output format depends on the "format" parameter // // Parameters: // uriComponents - Which components are to be retrieved. // uriFormat - The requested output format. // // This method returns: // The final result. The base impementaion could be invoked to get a suggested value // protected virtual string GetComponents(Uri uri, UriComponents components, UriFormat format) { if (((components & UriComponents.SerializationInfoString) != 0) && components != UriComponents.SerializationInfoString) throw new ArgumentOutOfRangeException("UriComponents.SerializationInfoString"); if ((format & ~UriFormat.SafeUnescaped) != 0) throw new ArgumentOutOfRangeException("format"); if (uri.UserDrivenParsing) throw new InvalidOperationException(SR.GetString(SR.net_uri_UserDrivenParsing, this.GetType().FullName)); if (!uri.IsAbsoluteUri) throw new InvalidOperationException(SR.GetString(SR.net_uri_NotAbsolute)); return uri.GetComponentsHelper(components, format); } // // // protected virtual bool IsWellFormedOriginalString(Uri uri) { return uri.InternalIsWellFormedOriginalString(); } // // Static Registration methods // // // Registers a custom Uri parser based on a scheme string // public static void Register(UriParser uriParser, string schemeName, int defaultPort) { ExceptionHelper.InfrastructurePermission.Demand(); if (uriParser == null) throw new ArgumentNullException("uriParser"); if (schemeName == null) throw new ArgumentNullException("schemeName"); if (schemeName.Length == 1) throw new ArgumentOutOfRangeException("uriParser.SchemeName"); if (!CheckSchemeName(schemeName)) throw new ArgumentOutOfRangeException("schemeName"); if ((defaultPort >= 0xFFFF || defaultPort < 0) && defaultPort != -1) throw new ArgumentOutOfRangeException("defaultPort"); schemeName = schemeName.ToLower(CultureInfo.InvariantCulture); FetchSyntax(uriParser, schemeName, defaultPort); } // // Is a Uri scheme known to System.Uri? // public static bool IsKnownScheme(string schemeName) { if (schemeName == null) throw new ArgumentNullException("schemeName"); if (!CheckSchemeName(schemeName)) throw new ArgumentOutOfRangeException("schemeName"); UriParser syntax = UriParser.GetSyntax(schemeName.ToLower(CultureInfo.InvariantCulture)); return syntax != null && syntax.NotAny(UriSyntaxFlags.V1_UnknownUri); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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