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FLocal/Common/BBCodes/helpers/UrlProcessor.cs

78 lines
2.1 KiB

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using FLocal.Core;
namespace FLocal.Common.BBCodes {
class UrlProcessor {
public struct UrlInfo {
public readonly bool isLocal;
private readonly string rawRelativeUrl;
public string relativeUrl {
get {
return this.rawRelativeUrl;
//return HttpUtility.UrlEncode(this.rawRelativeUrl);
}
}
public UrlInfo(bool isLocal, string relativeUrl) {
this.isLocal = isLocal;
this.rawRelativeUrl = relativeUrl;
}
}
private static string Safe(string str) {
return System.Web.HttpUtility.HtmlEncode(str);
}
public static UrlInfo Process(string url) {
if (url.StartsWith("/")) {
return new UrlInfo(true, url);
}
Uri uri;
try {
uri = new Uri(url);
} catch(UriFormatException) {
throw new Core.FLocalException("wrong url: " + url);
}
if (Config.instance.AdditionalHosts.Contains(uri.Host.ToLower()) || uri.Host.ToLower().EndsWith(Config.instance.BaseHost)) {
return new UrlInfo(true, uri.PathAndQuery);
} else {
return new UrlInfo(false, uri.ToString());
}
}
public static string ProcessLink(string link, string title, bool shortenRelative) {
bool isExternal = true;
string url;
if(shortenRelative) {
var urlInfo = UrlProcessor.Process(link);
url = urlInfo.relativeUrl;
isExternal = !urlInfo.isLocal;
} else {
var urlInfo = new Uri(link);
url = urlInfo.ToString();
}
if(isExternal) {
if(title == null) {
title = Safe(url);
}
} else {
var linkInfo = URL.UrlManager.Parse(url, new System.Collections.Specialized.NameValueCollection(), true);
if(linkInfo == null) {
throw new FLocalException("Unable to parse link: " + url);
}
url = linkInfo.canonicalFull;
if(title == null) {
title = Safe(linkInfo.title);
}
}
string result = String.Format("<a href=\"{0}\"{1}>{2}</a>", url, (isExternal ? " class=\"external\"" : ""), title);
return result;
}
}
}