82 lines
4.2 KiB
C#
82 lines
4.2 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="WebServiceClientProxyGenerator.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.Script.Services {
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using System;
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using System.IO;
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using System.Reflection;
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using System.Web;
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using System.Security.Permissions;
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using System.Security;
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internal class WebServiceClientProxyGenerator : ClientProxyGenerator {
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private string _path;
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// Called by ScriptManager to generate the proxy inline
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internal static string GetInlineClientProxyScript(string path, HttpContext context, bool debug) {
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WebServiceData webServiceData = WebServiceData.GetWebServiceData(context, path, true, false, true);
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WebServiceClientProxyGenerator proxyGenerator = new WebServiceClientProxyGenerator(path, debug);
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return proxyGenerator.GetClientProxyScript(webServiceData);
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}
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private static DateTime GetAssemblyModifiedTime(Assembly assembly) {
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AssemblyName assemblyName = assembly.GetName();
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DateTime writeTime = File.GetLastWriteTime(new Uri(assemblyName.CodeBase).LocalPath);
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// DevDiv 52056: include writeTime.Second in the date, otherwise if you modify it within the same minute it we'd still respond with http status 304 not modified
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return new DateTime(writeTime.Year, writeTime.Month, writeTime.Day, writeTime.Hour, writeTime.Minute, writeTime.Second);
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}
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// This is called thru the RestClientProxyHandler
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[SecuritySafeCritical]
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[FileIOPermission(SecurityAction.Assert, Unrestricted = true)]
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internal static string GetClientProxyScript(HttpContext context) {
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WebServiceData webServiceData = WebServiceData.GetWebServiceData(context, context.Request.FilePath);
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DateTime lastModifiedDate = GetAssemblyModifiedTime(webServiceData.TypeData.Type.Assembly);
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// If the browser sent this header, we can check if we need to resend
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string modifiedSince = context.Request.Headers["If-Modified-Since"];
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if (modifiedSince != null) {
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DateTime header;
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if (DateTime.TryParse(modifiedSince, out header)) {
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// We are done if the assembly hasn't been modified
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if (header >= lastModifiedDate) {
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context.Response.StatusCode = 304;
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return null;
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}
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}
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}
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bool debug = RestHandlerFactory.IsClientProxyDebugRequest(context.Request.PathInfo);
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// Only cache for release proxy script (/js)
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if (!debug) {
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// Only cache if we get a reasonable last modified date
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if (lastModifiedDate.ToUniversalTime() < DateTime.UtcNow) {
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// Cache the resource so we don't keep processing the same requests
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HttpCachePolicy cachePolicy = context.Response.Cache;
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cachePolicy.SetCacheability(HttpCacheability.Public);
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cachePolicy.SetLastModified(lastModifiedDate);
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// expires is necessary so that the browser at least does an If-Modified-Since request on every request.
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// without that, the browser wouldn't request a new proxy until the user hits refresh.
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// Use one year ago to reasonably ensure "past" interpretation
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cachePolicy.SetExpires(lastModifiedDate.AddYears(-1));
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}
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}
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WebServiceClientProxyGenerator proxyGenerator = new WebServiceClientProxyGenerator(context.Request.FilePath, debug);
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return proxyGenerator.GetClientProxyScript(webServiceData);
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}
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internal WebServiceClientProxyGenerator(string path, bool debug) {
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// internal because ExtensionsTest needs this path to bypass httpcontext
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_path = path;
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_debugMode = debug;
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}
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protected override string GetProxyPath() {
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return _path;
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}
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}
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}
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