相关疑难解决方法(0)

从https://mws.amazonservices.com/获取以下错误消息:

<Type>Sender</Type>
<Code>SignatureDoesNotMatch</Code>
?
<Message>
The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.
</Message>

这是我用来计算请求的VB.net代码.出于安全原因,我已删除了SecretKey和AWSAccessKeyId.

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim sURL As String = "https://mws.amazonservices.com/"

        Dim sRequest As String = ""
        sRequest &= "Acknowledged=" & Server.UrlEncode("false")
        sRequest &= "&Action=" & Server.UrlEncode("GetReportList")
        sRequest &= "&AWSAccessKeyId=" & Server.UrlEncode("REMOVED-FOR-SECURITY")
        sRequest &= "&Marketplace=" & Server.UrlEncode("REMOVED-FOR-SECURITY") …

Uri类默认为RFC 2396.对于OpenID和OAuth,我需要符合RFC 3986的Uri转义.

从System.Uri类文档:

默认情况下,URI中的任何保留字符都按照RFC 2396进行转义.如果启用了国际资源标识符或国际域名解析,则此行为会发生变化,在这种情况下,URI中的保留字符将根据RFC 3986和RFC 3987进行转义.

该文档还指出激活此IRI模式以及RFC 3986行为意味着将一个uri节元素添加到machine.config并将其添加到app/web.config文件中:

<configuration>
  <uri>
  <idn enabled="All" />
  <iriParsing enabled="true" />
  </uri>
</configuration>

但是,无论是否存在于.config文件中,我都会获得与.NET 3.5 SP1应用程序相同的(非3986)转义行为. 我还需要做些什么Uri.EscapeDataString才能使用RFC 3986规则？(具体来说,要转义RFC中定义的保留字符)

我可以在IE中手动下载.

http://scholar.google.com/scholar.ris?q=info:j8ymU9rzMsEJ:scholar.google.com/&output=citation&hl=zh-CN&as_sdt=2000&oe=GB&ct=citation&cd=0

但是,使用以下代码

WebClient client = new WebClient();
client.DownloadFile(address, filename);

显示例外:403禁止

怎么了？我怎样才能做到这一点？

其他

http://scholar.google.com/scholar.ris?q=info:sskrpr5jlLwJ:scholar.google.com/&output=citation&hl=zh-CN&as_sdt=2000&oe=GB&ct=citation&cd=1

我有一个URL包含几个斜杠字符(/)作为文件名的一部分(而不是URL).但是当我发送http请求时,百分比编码%2F被转换为/请求分派之前,因此生成错误的URL.

如何在PowerShell中创建一个忽略百分比编码值的文字http请求？

使用的实际网址(Chromium浏览器):

https://www.googleapis.com/download/storage/v1/b/chromium-browser-continuous/o/Win_x64%2F292817%2Fchrome-win32.zip?generation=1409504089694000&alt=media

我试过Invoke-WebRequestcmdlet:

Invoke-WebRequest -Uri $ChromeUrl -OutFile $FilePath -Verbose

VERBOSE: GET https://www.googleapis.com/download/storage/v1/b/chromium-browser-continuous/o/Win_x64/292817/chrome-win32.zip?generation=1409504089694000&alt=media with 0-byte payload1`

找不到错误.

还试过WebClient的DownloadFile方法:

$wclient = New-Object System.Net.WebClient
$wclient.DownloadFile($ChromeUrl, $FilePath)

由于再次请求错误的URL而返回404.

解决方法1(成功)

由briantist和Tanuj Mathur提供的基于反射的解决方法都很有效.后者:

$UrlFixSrc = @" 
using System;
using System.Reflection;

public static class URLFix 
{ 
    public static void ForceCanonicalPathAndQuery(Uri uri)
    {
        string paq = uri.PathAndQuery;
        FieldInfo flagsFieldInfo = typeof(Uri).GetField("m_Flags", BindingFlags.Instance | BindingFlags.NonPublic);
        ulong flags = (ulong) …

在.Net 4.5之前,似乎System.Uri会对编码的斜杠进行编码,但此后已经修复.参考:https://stackoverflow.com/a/20733619/188740

我遇到了与冒号相同的问题.System.Uri仍然编码冒号.例:

        var uri = new Uri("http://www.example.com/?foo=http%3A%2F%2Fwww.example.com");
        var s = uri.ToString(); //http://www.example.com/?foo=http:%2F%2Fwww.example.com

请注意System.Uri 如何%3A切换回:.这是一个错误吗？什么是最好的解决方法？

我试图使用System.Web从服务器下载文件.它确实有效,但有些链接给我带来了麻烦.链接看起来像这样:

http://cdn.somesite.com/r1KH3Z%2FaMY6kLQ9Y4nVxYtlfrcewvKO9HLTCUBjU8IBAYnA3vzE1LGrkqMrR9Nh3jTMVFZzC7mxMBeNK5uY3nx5K0MjUaegM3crVpFNGk6a6TW6NJ3hnlvFuaugE65SQ4yM5754BM%2BLagqYvwvLAhG3DKU9SGUI54UAq3dwMDU%2BMl9lUO18hJF3OtzKiQfrC/the_file.ext

代码看起来基本上是这样的:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(link);
WebResponse response = request.getResponse();

getResponse()始终抛出异常(错误400错误请求).但是,我知道该链接有效,因为我可以使用Firefox下载该文件而不会出现问题.

我也尝试用Uri.UnescapeDataString(链接)解码链接,但该链接甚至不能在Firefox中工作.

其他链接以这种方式完美地工作..只是这些不起作用.

编辑:

好的,我发现了一些使用wireshark的东西:

如果我使用Firefox打开链接,则发送:

&ME3@"dM*PNyAo PA:]GET /r1KH3Z%2FaMY6kLQ9Y4nVxYp5DyNc49t5kJBybvjbcsJJZ0IUJBtBWCgri3zfTERQught6S8ws1a%2BCo0RS5w3KTmbL7i5yytRpn2QELEPUXZTGYWbAg5eyGO2yIIbmGOcFP41WdrFRFcfk4hAIyZ7rs4QgbudzcrJivrAaOTYkEnozqmdoSCCY8yb1i22YtEAV/epd_outpost_12adb.flv HTTP/1.1
Host: cdn.somesite.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:12.0) Gecko/20100101 Firefox/12.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: de-de,de;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Connection: keep-alive

我认为只有第一行是问题,因为WebRequest.Create(link)解码了url:

&MEz.@!dM/nP9@~P>.GET /r1KH3Z/aMY6kLQ9Y4nVxYp5DyNc49t5kJBybvjbcsJJZ0IUJBtBWCgri3zfTERQught6S8ws1a%2BCo0RS5w3KTmbL7i5yytRpn2QELEPUXZTGYWbAg5eyGO2yIIbmGOcFP41WdrFRFcfk4hAIyZ7rs6Mmh1EsQQ4vJVYUwtbLBDNx9AwCHlWDfzfSWIHzaaIo/epd_outpost_12adb.flv HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:12.0) Gecko/20100101 Firefox/12.0
Host: cdn.somesite.com

(%2F替换为/)

另一个编辑:

我发现Uri类自动解码url:Uri uri = new Uri(link); //链接未解码Debug.WriteLine(uri.ToString()); //链接在此解码.

我怎么能阻止这个？

在此先感谢您的帮助.

我一直在尝试/使用以下命令从powershell 访问带有字符的URL (它是对gitlab服务器的查询以检索调用的项目"foo/bar"):

Invoke-WebRequest https://server.com/api/v3/projects/foo%2Fbar -Verbose

现在,奇怪的是使用PowerShell ISE或Visual Studio,请求是正常的.使用PowerShell本身时,URL会自动取消转义,并且请求失败.例如

在ISE/VS中:

$> Invoke-WebRequest https://server.com/api/v3/projects/foo%2Fbar -Verbose
VERBOSE: GET https://server.com/api/v3/projects/foo%2Fbar with 0-byte payload
VERBOSE: received 19903-byte response of content type application/json

StatusCode        : 200
StatusDescription : OK
Content           : .... data ....

在Powershell中:

$> Invoke-WebRequest https://server.com/api/v3/projects/foo%2Fbar -Verbose
VERBOSE: GET https://server.com/api/v3/projects/foo/bar with 0-byte payload
Invoke-WebRequest : {"error":"404 Not Found"}
At line:1 char:1
+ Invoke-WebRequest 'https://server.com/api/v3/projects/foo%2Fbar ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-WebRequest], WebException
    + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeWebRequestCommand

我尝试在URL周围添加单引号和双引号,但没有任何帮助. …

如何阻止System.Uri类取消编码传递给其构造函数的编码URL？请考虑以下代码: -

Uri uri = new Uri("http://foo.bar/foo%2FBar");
Console.WriteLine(uri.AbsoluteUri);
uri = new Uri("http://foo.bar/foo%2FBar", false);
Console.WriteLine(uri.AbsoluteUri);
uri = new Uri("http://foo.bar/foo%2FBar", true);
Console.WriteLine(uri.AbsoluteUri);

在每种情况下,输出都是"http://foo.bar/foo/bar".如何确保在实例化Uri实例后,Uri.AbsoluteUri将返回"http://foo.bar/foo%2FBar"？

我试图让Uri停止编码'/'如下所述: 使用URL编码的斜杠获取URL

但是如何在PowerShell中实现同样的目标呢？

我试图遵循访问私有财产的路线并改变它的价值,但我无法让它发挥作用.

[Uri].GetProperties([System.Reflection.BindingFlags]::NonPublic) - 什么都不返回

有任何想法吗？

在本地计算机上使用ReSharper 8.2,在构建服务器上使用NUnit 2.6.3,发现在ReSharper中传递了一些测试并在NUnit中失败.在本地安装NUnit并且结果相同,因此计算机之间没有区别.我的两个同事进行了相同的测试并得到了相同的结果,所以看起来似乎没有弄乱我的电脑.

测试的简化版本:

[Test]
public void Test_UrlQueryString()
{
    var urlInput = "http://www.domain.com/page-with-querystring?url=https://www.domain2.com/page%3Fp%3DPEPE";
    var uri = new Uri(urlInput);

    Assert.AreEqual(urlInput, uri.ToString());
}

[Test]
public void Test_Dot()
{
    var urlInput = "http://www.domain.com/page-with-dot.?p=google";
    var uri = new Uri(urlInput);

    Assert.AreEqual(urlInput, uri.ToString());
}

ReSharper输出全部为绿色.NUnit的输出:

Runtime Environment -
   OS Version: Microsoft Windows NT 6.1.7601 Service Pack 1
  CLR Version: 4.0.30319.18444 ( Net 4.5 )

ProcessModel: Default    DomainUsage: Single
Execution Runtime: net-4.5
...................F.F.........
Tests run: 29, Errors: 0, Failures: 2, Inconclusive: 0, Time: 0.576769973208475 seconds
  Not run: …