.net 获取使用 HttpWebRequest/HttpWebResponse 进行的 HTTP 请求和响应以在 Fiddler 中显示
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Get HTTP requests and responses made using HttpWebRequest/HttpWebResponse to show in Fiddler
提问by Fung
Is there any way I can hook Fiddler up to capture requests and responses made using .NET HttpWebRequest and HttpWebResponse?
有什么方法可以让 Fiddler 连接起来捕获使用 .NET HttpWebRequest 和 HttpWebResponse 发出的请求和响应？
回答by CraigTP
The Fiddler FAQ gives the answer to this.
Fiddler FAQ 给出了答案。
You essentially route your HTTP traffic through Fiddler (i.e. Use Fiddler as a proxy).
您基本上通过 Fiddler 路由您的 HTTP 流量（即使用 Fiddler 作为代理）。
Here's some links that will help:
Fiddler Web Debugging - Configuring Clients
以下是一些有帮助的链接：
Fiddler Web 调试 - 配置客户端
Which in turn links to here:
Take the Burden Off Users with Automatic Configuration in .NET
依次链接到此处：
通过 .NET 中的自动配置减轻用户的负担
You can achieve this via some configuration settings in the web.config file (for an ASP.NET application) like so:
您可以通过 web.config 文件（对于 ASP.NET 应用程序）中的一些配置设置来实现这一点，如下所示：
<system.net>
<defaultProxy>
<proxy
proxyaddress="http://[your proxy address and port number]"
bypassonlocal="false"
/>
</defaultProxy>
</system.net>
See herefor complete details on the <defaultProxy>setting.
有关设置的完整详细信息，请参见此处<defaultProxy>。
Alternatively, you can use a WebProxy object in your code using something like:
或者，您可以使用以下内容在代码中使用 WebProxy 对象：
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("[ultimate destination of your request]");
WebProxy myproxy = new WebProxy("[your proxy address]", false);
request.Proxy = myproxy;
request.Method = "GET";
HttpWebResponse response = (HttpWebResponse) request.GetResponse();
See herefor complete details on the WebProxy class.
有关WebProxy 类的完整详细信息，请参见此处。
Also note the important "caveat" that is mentioned in the Fiddler FAQ:
还要注意 Fiddler 常见问题中提到的重要“警告”：
Why don't I see traffic sent to http://localhostor http://127.0.0.1?
IE7 and the .NET Framework are hardcoded not to send requests for Localhost through any proxies, and as a proxy, Fiddler will not receive such traffic.The workaround is to use your machine name as the hostname instead of Localhost or 127.0.0.1. So, for instance, rather than hitting http://localhost:8081/mytestpage.aspx, instead visit http://machinename:8081/mytestpage.aspx.
...Or, if you're using Fiddler v2.1.8 or later, just use http://ipv4.fiddlerto hit localhost on the IPv4 adapter, or use http://ipv6.fiddlerto hit localhost on the IPv6 adapter. This works especially well with the Visual Studio test webserver (codename: Cassini) because the test server only listens on the IPv4 loopback adapter.
Lastly, you could Customize your Rules file like so:
static function OnBeforeRequest(oSession:Fiddler.Session) { if (oSession.HostnameIs("MYAPP")) { oSession.host = "127.0.0.1:8081"; } }...and then just hit http://myapp, which will act as an alias for 127.0.0.1:8081.
为什么我看不到发送到http://localhost或http://127.0.0.1 的流量？
IE7 和 .NET Framework 被硬编码为不通过任何代理发送对 Localhost 的请求，作为代理，Fiddler 不会收到此类流量。解决方法是使用您的机器名称作为主机名，而不是 Localhost 或 127.0.0.1。因此，例如， 不要访问http:// localhost:8081/mytestpage.aspx，而是访问 http://machinename:8081/mytestpage.aspx。
...或者，如果您使用 Fiddler v2.1.8 或更高版本，只需使用http://ipv4.fiddler在 IPv4 适配器上访问 localhost，或使用http://ipv6.fiddler在 IPv6 适配器上访问 localhost . 这对 Visual Studio 测试网络服务器（代号：Cassini）特别有效，因为测试服务器只侦听 IPv4 环回适配器。
最后，您可以像这样自定义规则文件：
static function OnBeforeRequest(oSession:Fiddler.Session) { if (oSession.HostnameIs("MYAPP")) { oSession.host = "127.0.0.1:8081"; } }...然后只需点击http://myapp，它将充当 127.0.0.1:8081 的别名。
回答by RichieHindle
If you can't, Wiresharkis a similar tool that works at the network hardware level, so it can capture network traffic from any application.
如果不能，Wireshark是一个类似的工具，可以在网络硬件级别工作，因此它可以捕获来自任何应用程序的网络流量。
Wireshark is a bit more complex than Fiddler, and more general, but it's a great tool to have in your toolbox, and worth investigating a bit of time into.
Wireshark 比 Fiddler 稍微复杂一些，也更通用，但它是您工具箱中的一个很好的工具，值得花一些时间研究。
回答by Richard
If you are able to modify the request URI, and it is localhostthen there is a much simpler solution: change the hostname to localhost.fiddler.
如果您能够修改请求 URI，localhost那么有一个更简单的解决方案：将主机名更改为localhost.fiddler.
This has no dependency on setting up proxies (whether setting HttpWebRequest.Proxyor the <defaultProxy>element in a .configfile).
这不依赖于设置代理（无论是设置HttpWebRequest.Proxy还是文件中的<defaultProxy>元素.config）。
(From comment on this question.)
（来自对这个问题的评论。）
