`curl -X DELETE ...` 的 WebRequest 等效方法

Question

`curl -X DELETE ...` 的 WebRequest 等效方法

4

我在尝试创建一个与以下curl命令等效的WebRequest时遇到了问题:

curl -vX DELETE "http://admin:123@localhost:5984/booster"

该命令运行正常，输出如下：

C:\Projects\Booster\Bin>curl -vX DELETE "http://admin:123@localhost:5984/booster"
* About to connect() to localhost port 5984 (#0)
*   Trying 127.0.0.1... connected
* Server auth using Basic with user 'admin'
> DELETE /booster HTTP/1.1
> Authorization: Basic YWRtaW46MTIz
> User-Agent: curl/7.22.0 (i386-pc-win32) libcurl/7.22.0 OpenSSL/0.9.8r zlib/1.2.5
> Host: localhost:5984
> Accept: */*
>
< HTTP/1.1 200 OK
< Server: CouchDB/1.0.2 (Erlang OTP/R14B)
< Date: Fri, 25 Nov 2011 01:03:45 GMT
< Content-Type: text/plain;charset=utf-8
< Content-Length: 12
< Cache-Control: must-revalidate
<
{"ok":true}
* Connection #0 to host localhost left intact
* Closing connection #0

当我使用以下等效代码时，它按预期删除了CouchDB数据库：

try
{
    var request = WebRequest.Create("http://admin:123@localhost:5984/booster");

    request.Headers.Clear();
    request.Method = "DELETE";

    var response = request.GetResponse();

    Console.WriteLine(response.GetResponseString());
}
catch (WebException e)
{
    Console.WriteLine(e.Response.GetResponseString());
}

要做与curl命令相同的事情，我得到了一个异常，告诉我："远程服务器返回错误：（405）方法不允许。" 服务器响应为'{"error":"method_not_allowed","reason":"Only GET,HEAD allowed"}'。

问题是：curl命令和通过WebRequest执行的命令之间有什么区别？为什么在第一种情况下一切都正常工作，在第二种情况下一切都失败了？

- Lu4

1

我不知道你问题的答案，但你可以使用Wireshark或者可能的Fiddler作为诊断工具来查看正在传输的内容。 - user47589

我已经安装了Wireshark，但是我无法理解它，你能给我一些快速入门教程的链接吗？ - Lu4

1

你尝试过设置Credentials属性，而不是在URL中指定admin:123吗？ - dtb

1个回答

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原文链接

- Lu4 · Accepted Answer

我已经找出了问题所在，以下是解决方案：

Wireshark显示了客户端和服务器之间的以下通信：

WebRequest案例

DELETE /booster HTTP/1.1
Host: localhost:5984
Connection: Keep-Alive

HTTP/1.1 302 Moved Temporarily
Server: CouchDB/1.0.2 (Erlang OTP/R14B)
Location: http://localhost:5984/_utils/session.html?return=%2Fbooster&reason=You%20are%20not%20a%20server%20admin.
Date: Fri, 25 Nov 2011 09:54:29 GMT
Content-Type: text/plain;charset=utf-8
Content-Length: 64
Cache-Control: must-revalidate

{"error":"unauthorized","reason":"You are not a server admin."}
DELETE /_utils/session.html?return=%2Fbooster&reason=You%20are%20not%20a%20server%20admin. HTTP/1.1
Host: localhost:5984

HTTP/1.1 405 Method Not Allowed
Server: CouchDB/1.0.2 (Erlang OTP/R14B)
Date: Fri, 25 Nov 2011 09:54:29 GMT
Content-Type: text/plain;charset=utf-8
Content-Length: 64
Cache-Control: must-revalidate
Allow: GET,HEAD

{"error":"method_not_allowed","reason":"Only GET,HEAD allowed"}

curl的用例

DELETE /booster HTTP/1.1
Authorization: Basic YWRtaW46MTIz
User-Agent: curl/7.22.0 (i386-pc-win32) libcurl/7.22.0 OpenSSL/0.9.8r zlib/1.2.5
Host: localhost:5984
Accept: */*

HTTP/1.1 404 Object Not Found
Server: CouchDB/1.0.2 (Erlang OTP/R14B)
Date: Fri, 25 Nov 2011 09:54:14 GMT
Content-Type: text/plain;charset=utf-8
Content-Length: 41
Cache-Control: must-revalidate

{"error":"not_found","reason":"missing"}

这表明WebRequest没有使用基本授权，而curl确实使用了。通过一些简单的搜索，我们可以找到在WebRequest上使用基本授权的方法，如下所示：

try
{
    var request = WebRequest.Create("http://localhost:5984/booster");

    request.Headers.Clear();

    request.Headers["Authorization"] = "Basic " + Convert.ToBase64String(Encoding.Default.GetBytes("admin:123"));
    request.Method = "DELETE";

    var response = request.GetResponse();

    Console.WriteLine(response.GetResponseString());
}
catch (WebException e)
{
    Console.WriteLine(e.Response.GetResponseString());
}