阿里签名中URLEncode于C#URLEncod不同之处

问题

如上图所示,阿里云的PercentEncode 转换! 为 %21

PercentEncode 源码为:

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package com.aliyuncs.auth;

 

import java.io.UnsupportedEncodingException;

import java.net.URLEncoder;

 

public class AcsURLEncoder {

    publicfinal static String URL_ENCODING = "UTF-8";

     

    publicstatic String encode(String value)throws UnsupportedEncodingException {

        returnURLEncoder.encode(value, URL_ENCODING);

    }

     

    publicstatic String percentEncode(String value)throws UnsupportedEncodingException{

        returnvalue != null ? URLEncoder.encode(value, URL_ENCODING).replace("+","%20")

                .replace("*","%2A").replace("%7E","~") : null;

    }

}

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查找问题

第三方工具

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<a href="http://images2015.cnblogs.com/blog/684558/201701/684558-20170106162851378-1970650580.png"><img style="background-image: none; padding-top: 0px; padding-left: 0px; display: inline; padding-right: 0px; border-width: 0px;"title="QQ截图20170106160805"src="http://images2015.cnblogs.com/blog/684558/201701/684558-20170106162852784-188184266.png"alt="QQ截图20170106160805"width="644" height="170" border="0"></a>

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上图表明的确没有转义！（感叹号）

 

C#中的URLEncode转义

C#中URLEncode，C#中有两种URLEncode，WebUlitity 和HttpUlitity

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[TestFixture]

publicclass TestUlities

 {

     [Test]

     publicvoid Test()

     {

         varurl = @"http://img05.taobaocdn.com/bao/uploaded/TB2BVKlfFXXXXarXXXXXXXXXXXX_!!111708970-0-saturn_solar.jpg";

 

         varwebUrlEncode = WebUtility.UrlEncode(url);

 

         varhttpUrlEncode = HttpUtility.UrlEncode(url);

     }

 }

 

发现都没有转义！（感叹号）

 

WHY

 

In general URIs as defined by RFC 3986 (see Section 2: Characters) may contain any of the following characters:

ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~:/?#[]@!$&'()*+,;=`.

Any other character needs to be encoded with the percent-encoding (%hh). Each part of the URI has further restrictions about what characters need to be represented by an percent-encoded word.

 

解决

使用以下代码URLEncode 来进行URLEncode

 

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publicclass AliUrlEncodeHelper

  {

      publicstatic stringEncode(stringstr)

      {

          return!string.IsNullOrEmpty(str) ?

              WebUtility.UrlEncode(str).Replace("+","%20")

              .Replace("*","%2A")

              .Replace("%7E","~")

              .Replace("!","%21")

              .Replace("'","%27")

              .Replace("(","%28")

              .Replace(")","%29")

              :str;

      }

  }

结论

阿里的URLEncode 有点过时，或者说自定义的，需要我们特殊处理。

 

附：阿里签名规则

 

参考

Which characters make a URL invalid?

Les codes hexas et unicode des caractères usuels, par Nicolas Hoffmann

阿里云签名机制

转载于          https://www.cnblogs.com/HQFZ/p/6256821.html