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问奇怪(unicode?)人物
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Stack Overflow用户

提问于 2014-03-07 02:32:23

回答 3查看 11.4K关注 0票数 7

一个用户在我的网站上发布了一些奇怪的字符，我想阻止他们这样做，但不阻止在外语中使用的字符…因此，使用像[a-z0-9!@#$%^&*()...]这样的正则表达式是不可取的。

有人能给我解释一下这里发生了什么吗，为什么它会以这种方式显示。角色是如何创建的，我如何防止他们这样做？

♥̧̧̧̛̣̘̟̘̥͓̫̪̹̪̪̮̯̞̘̙̦̝̭̭͕̜̰̩̗̟̹͔̜̥̟̗̗̥̦̠̖̫͕̺̻̞̥̹͇̱̥̥̻͇̦̙̣͊͗̉̽̈́̉͑̀́̃͒̏͋̃̅̇̊̏̎̈́͊͐̉͑̄̌̉́̈́́́̅̇͌̽̽͗́̄̾̓̈́̇̅͛́̈́͐̽̔̌̋̌̾́̿͌̔͊͆̈́̉́̎̔̊͗̊̂̎̍̏̈̀̏͋͌̋̽̄̐̽͐̀͘̕̕͘̕̚̚̚͘͜͜͜͠͝͠͝͠͝

谢谢

编辑:所以它们是用来强调字符的？有没有一种通用的做法或方法来防止用户在不完全阻止它们的情况下利用它们？我对外语或它们的实际使用/目的了解不够多，所以设计一些东西来限制组合字符的使用超出了我的能力范围。:-/

unicode

special-characters

zalgo

回答 3

Stack Overflow用户

回答已采纳

发布于 2014-03-07 02:43:52

这些是combining diacritical marks。对于字符ée-急性，您可以使用代码点U+00E9 (LATIN_SMALL_LETTER_E_WITH_ACUTE)或序列U+0065 U+0301 (LATIN_SMALL_LETTER_E COMBINING_ACUTE_ACENT)来表示它，其中文本渲染器将重音置于前面的代码点之上。

用户正在使用一系列组合标记来利用这一点：

codepoint   glyph   escaped    UTF-8           info
=======================================================================
U+2665      ♥       \u2665     e2,99,a5,       MISCELLANEOUS_SYMBOLS, OTHER_SYMBOL
U+034a      ͊       \u034a     cd,8a,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0360      ͠       \u0360     cd,a0,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0357      ͗       \u0357     cd,97,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0309      ̉       \u0309     cc,89,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d      ̽       \u033d     cc,bd,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344      ̈́       \u0344     cd,84,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0309      ̉       \u0309     cc,89,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0351      ͑       \u0351     cd,91,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0340      ̀       \u0340     cd,80,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035d      ͝       \u035d     cd,9d,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301      ́       \u0301     cc,81,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0303      ̃       \u0303     cc,83,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0352      ͒       \u0352     cd,92,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030f      ̏       \u030f     cc,8f,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034b      ͋       \u034b     cd,8b,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0303      ̃       \u0303     cc,83,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0305      ̅       \u0305     cc,85,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0307      ̇       \u0307     cc,87,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030a      ̊       \u030a     cc,8a,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030f      ̏       \u030f     cc,8f,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030e      ̎       \u030e     cc,8e,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344      ̈́       \u0344     cd,84,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034a      ͊       \u034a     cd,8a,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0350      ͐       \u0350     cd,90,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0309      ̉       \u0309     cc,89,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0351      ͑       \u0351     cd,91,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0304      ̄       \u0304     cc,84,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030c      ̌       \u030c     cc,8c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0309      ̉       \u0309     cc,89,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301      ́       \u0301     cc,81,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344      ̈́       \u0344     cd,84,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0341      ́       \u0341     cd,81,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301      ́       \u0301     cc,81,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0305      ̅       \u0305     cc,85,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0307      ̇       \u0307     cc,87,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034c      ͌       \u034c     cd,8c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d      ̽       \u033d     cc,bd,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d      ̽       \u033d     cc,bd,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0357      ͗       \u0357     cd,97,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301      ́       \u0301     cc,81,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0360      ͠       \u0360     cd,a0,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0304      ̄       \u0304     cc,84,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033e      ̾       \u033e     cc,be,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0343      ̓       \u0343     cd,83,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344      ̈́       \u0344     cd,84,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0307      ̇       \u0307     cc,87,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0358      ͘       \u0358     cd,98,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0305      ̅       \u0305     cc,85,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035d      ͝       \u035d     cd,9d,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035b      ͛       \u035b     cd,9b,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301      ́       \u0301     cc,81,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344      ̈́       \u0344     cd,84,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0350      ͐       \u0350     cd,90,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d      ̽       \u033d     cc,bd,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0314      ̔       \u0314     cc,94,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030c      ̌       \u030c     cc,8c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030b      ̋       \u030b     cc,8b,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030c      ̌       \u030c     cc,8c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033e      ̾       \u033e     cc,be,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0360      ͠       \u0360     cd,a0,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0301      ́       \u0301     cc,81,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033f      ̿       \u033f     cc,bf,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034c      ͌       \u034c     cd,8c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0314      ̔       \u0314     cc,94,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0315      ̕       \u0315     cc,95,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034a      ͊       \u034a     cd,8a,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0346      ͆       \u0346     cd,86,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0344      ̈́       \u0344     cd,84,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0309      ̉       \u0309     cc,89,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035d      ͝       \u035d     cd,9d,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0341      ́       \u0341     cd,81,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0315      ̕       \u0315     cc,95,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030e      ̎       \u030e     cc,8e,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0314      ̔       \u0314     cc,94,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030a      ̊       \u030a     cc,8a,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0357      ͗       \u0357     cd,97,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0358      ͘       \u0358     cd,98,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030a      ̊       \u030a     cc,8a,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0315      ̕       \u0315     cc,95,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0302      ̂       \u0302     cc,82,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030e      ̎       \u030e     cc,8e,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030d      ̍       \u030d     cc,8d,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030f      ̏       \u030f     cc,8f,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0308      ̈       \u0308     cc,88,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0340      ̀       \u0340     cd,80,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030f      ̏       \u030f     cc,8f,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031a      ̚       \u031a     cc,9a,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034b      ͋       \u034b     cd,8b,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031a      ̚       \u031a     cc,9a,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031a      ̚       \u031a     cc,9a,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+034c      ͌       \u034c     cd,8c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+030b      ̋       \u030b     cc,8b,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d      ̽       \u033d     cc,bd,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0304      ̄       \u0304     cc,84,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0310      ̐       \u0310     cc,90,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033d      ̽       \u033d     cc,bd,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0350      ͐       \u0350     cd,90,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031b      ̛       \u031b     cc,9b,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0358      ͘       \u0358     cd,98,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0300      ̀       \u0300     cc,80,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0323      ̣       \u0323     cc,a3,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0318      ̘       \u0318     cc,98,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031f      ̟       \u031f     cc,9f,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035c      ͜       \u035c     cd,9c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0318      ̘       \u0318     cc,98,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035c      ͜       \u035c     cd,9c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325      ̥       \u0325     cc,a5,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0353      ͓       \u0353     cd,93,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032b      ̫       \u032b     cc,ab,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032a      ̪       \u032a     cc,aa,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0339      ̹       \u0339     cc,b9,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032a      ̪       \u032a     cc,aa,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032a      ̪       \u032a     cc,aa,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+035c      ͜       \u035c     cd,9c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032e      ̮       \u032e     cc,ae,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032f      ̯       \u032f     cc,af,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0327      ̧       \u0327     cc,a7,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031e      ̞       \u031e     cc,9e,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0318      ̘       \u0318     cc,98,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0319      ̙       \u0319     cc,99,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0326      ̦       \u0326     cc,a6,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031d      ̝       \u031d     cc,9d,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032d      ̭       \u032d     cc,ad,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032d      ̭       \u032d     cc,ad,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0355      ͕       \u0355     cd,95,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031c      ̜       \u031c     cc,9c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0330      ̰       \u0330     cc,b0,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0329      ̩       \u0329     cc,a9,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0317      ̗       \u0317     cc,97,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031f      ̟       \u031f     cc,9f,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0339      ̹       \u0339     cc,b9,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0354      ͔       \u0354     cd,94,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031c      ̜       \u031c     cc,9c,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325      ̥       \u0325     cc,a5,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031f      ̟       \u031f     cc,9f,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0317      ̗       \u0317     cc,97,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0317      ̗       \u0317     cc,97,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325      ̥       \u0325     cc,a5,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0326      ̦       \u0326     cc,a6,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0320      ̠       \u0320     cc,a0,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0316      ̖       \u0316     cc,96,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+032b      ̫       \u032b     cc,ab,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0355      ͕       \u0355     cd,95,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033a      ̺       \u033a     cc,ba,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0327      ̧       \u0327     cc,a7,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033b      ̻       \u033b     cc,bb,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+031e      ̞       \u031e     cc,9e,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325      ̥       \u0325     cc,a5,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0327      ̧       \u0327     cc,a7,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0339      ̹       \u0339     cc,b9,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0347      ͇       \u0347     cd,87,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0331      ̱       \u0331     cc,b1,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325      ̥       \u0325     cc,a5,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0325      ̥       \u0325     cc,a5,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+033b      ̻       \u033b     cc,bb,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0347      ͇       \u0347     cd,87,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0326      ̦       \u0326     cc,a6,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0319      ̙       \u0319     cc,99,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK
U+0323      ̣       \u0323     cc,a3,          COMBINING_DIACRITICAL_MARKS, NON_SPACING_MARK

我在评论中提出了一些观点：

如果没有意义，Unicode standard认为所有的代码点序列都是有效的(请参见chapter 2 of unicode6)
Unicode不描述应该如何显示代码点-这取决于文本呈现NFC和code point category上的匹配可能对检测冗余代码很有用可以使用浏览器控制台创建类似上面的序列
- 只需键入像"\u2665\u034a\u0360\u0357"
- You这样的UTF-16 JavaScript字符串文字就可以使用中的代码点值对于basic multilingual plane
- For中的任何内容，您必须对translate the code points to UTF-16

执行the charts操作

票数 5

Stack Overflow用户

发布于 2014-03-07 02:38:08

阻止这些代码点对您来说可能就足够了：

http://en.wikipedia.org/wiki/Combining_character#Unicode_ranges

票数 1

Stack Overflow用户

发布于 2014-03-07 02:43:21

允许用户“张贴奇怪的字符”可能会让他们造成比看起来奇怪的文本更多的破坏。例如，检查跨站点脚本和类似的攻击。请确保无论您使用什么工具来处理此功能，都要达到标准(安全方面)，并且配置良好。这应该会消除你所担心的副作用问题。

票数 -6

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/22233001

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