{"id":35700,"date":"2025-05-06T10:55:51","date_gmt":"2025-05-06T02:55:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/35700.html"},"modified":"2025-05-06T10:55:51","modified_gmt":"2025-05-06T02:55:51","slug":"python%e4%bd%bf%e7%94%a8flask%e5%86%99%e4%b8%80%e4%b8%aa%e4%b8%8a%e4%bc%a0%e6%96%87%e4%bb%b6%e7%9a%84%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%8a%9f%e8%83%bd%ef%bc%8c%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/35700.html","title":{"rendered":"python\u4f7f\u7528Flask\u5199\u4e00\u4e2a\u4e0a\u4f20\u6587\u4ef6\u7684\u670d\u52a1\u5668\u529f\u80fd\uff0c\u793a\u4f8b\u4ee3\u7801"},"content":{"rendered":"<\/p>\n<h4>\u8fd9\u91cc\u5199\u81ea\u5b9a\u4e49\u76ee\u5f55\u6807\u9898<\/h4>\n<ul>\n<li>Flask\u8fd9\u79cd\u8f7b\u91cf\u7ea7\u6846\u67b6\u6bd4\u8f83\u9002\u5408\u65b0\u624b<\/li>\n<li>\n<ul>\n<li>1.\u9996\u5148\u662f\u5165\u53e3\u7a0b\u5e8fapp.py<\/li>\n<li>2.\u76ee\u5f55\u7ed3\u6784<\/li>\n<li>3.html\u9875\u9762\u65b9\u4fbf\u7ed9\u5ba2\u6237\u663e\u793a\u5185\u5bb9<\/li>\n<li>4.\u5b9e\u4f8b\u8bf4\u660e\u548c\u7528\u6237\u64cd\u4f5c<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Flask\u8fd9\u79cd\u8f7b\u91cf\u7ea7\u6846\u67b6\u6bd4\u8f83\u9002\u5408\u65b0\u624b<\/h2>\n<p>\u6700\u8fd1\u9700\u8981\u7528\u5230\u7b80\u6613\u670d\u52a1\u5668\u4e0a\u4f20\u56fe\u50cf\u529f\u80fd&#xff0c;\u4e8e\u662f\u8fb9\u5b66\u8fb9\u8bb0\u5f55\u5229\u7528Flask\u5b8c\u6210\u4f20\u56fe\u529f\u80fd&#xff0c;web\u77e5\u8bc6\u8f83\u6b20\u7f3a&#xff0c;\u8001\u624b\u52ff\u55b7&#xff01;<\/p>\n<h3>1.\u9996\u5148\u662f\u5165\u53e3\u7a0b\u5e8fapp.py<\/h3>\n<p>\u9644\u4e0a\u5b8c\u6574\u4ee3\u7801&#xff0c;\u542f\u52a8Falsk\u8bbe\u7f6e\u4e00\u4e9b\u53c2\u6570\u7279\u522b\u662fip\u548c\u7aef\u53e3\u8fd8\u6709\u9759\u6001\u6587\u4ef6\u5939&#xff0c;\u65b9\u4fbf\u7528\u6237\u8bbf\u95ee\u56fe\u7247\u7b49\u7b49\u3002\u9700\u8981\u5b89\u88c5Flask\u6a21\u5757&#xff0c;pip3 install Flask Flask-WTF\u3002\u4ee5\u4e0b\u662f\u7a0b\u5e8f\u5165\u53e3app.py\u6587\u4ef6<\/p>\n<p><span class=\"token keyword\">from<\/span> flask <span class=\"token keyword\">import<\/span> Flask<span class=\"token punctuation\">,<\/span> render_template<span class=\"token punctuation\">,<\/span> request<span class=\"token punctuation\">,<\/span> jsonify<br \/>\n<span class=\"token keyword\">from<\/span> flask_wtf <span class=\"token keyword\">import<\/span> FlaskForm<span class=\"token punctuation\">,<\/span> CSRFProtect<br \/>\n<span class=\"token keyword\">from<\/span> werkzeug<span class=\"token punctuation\">.<\/span>utils <span class=\"token keyword\">import<\/span> secure_filename<br \/>\n<span class=\"token keyword\">from<\/span> wtforms <span class=\"token keyword\">import<\/span> FileField<span class=\"token punctuation\">,<\/span> SubmitField<br \/>\n<span class=\"token keyword\">from<\/span> wtforms<span class=\"token punctuation\">.<\/span>validators <span class=\"token keyword\">import<\/span> DataRequired<br \/>\n<span class=\"token keyword\">import<\/span> os<br \/>\n<span class=\"token keyword\">import<\/span> secrets<br \/>\n<span class=\"token keyword\">from<\/span> datetime <span class=\"token keyword\">import<\/span> timedelta<br \/>\n<span class=\"token comment\"># from helper.utils import is_valid_image<\/span><br \/>\n<span class=\"token comment\">##########\u6ce8\u610f\u8fd9\u91cc\u5fc5\u987b\u5199static_folder&#xff0c;\u5426\u5219\u4e0b\u9762\u7528\u6237\u8bf7\u6c42\u4e0d\u5230\u56fe\u7247<\/span><br \/>\napp <span class=\"token operator\">&#061;<\/span> Flask<span class=\"token punctuation\">(<\/span>__name__<span class=\"token punctuation\">,<\/span>static_folder<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#039;uploads&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;SECRET_KEY&#039;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;youdontknowdontknow&#039;<\/span>  <span class=\"token comment\"># \u7528\u4e8e\u8868\u5355\u7684CSRF\u4fdd\u62a4<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;UPLOAD_FOLDER&#039;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;uploads\/&#039;<\/span>  <span class=\"token comment\"># \u56fe\u7247\u4e0a\u4f20\u7684\u6587\u4ef6\u5939<\/span><br \/>\napp<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;MAX_CONTENT_LENGTH&#039;<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">4<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">1024<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">1024<\/span>  <span class=\"token comment\"># \u9650\u5236\u6587\u4ef6\u5927\u5c0f\u4e3a4MB<\/span><br \/>\ncsrf <span class=\"token operator\">&#061;<\/span> CSRFProtect<span class=\"token punctuation\">(<\/span>app<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token comment\"># \u8bbe\u7f6e\u5141\u8bb8\u7684\u6587\u4ef6\u683c\u5f0f<\/span><br \/>\nALLOWED_EXTENSIONS <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">set<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;png&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;jpg&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;JPG&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;PNG&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;bmp&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">allowed_file<\/span><span class=\"token punctuation\">(<\/span>filename<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#039;.&#039;<\/span> <span class=\"token keyword\">in<\/span> filename <span class=\"token keyword\">and<\/span> filename<span class=\"token punctuation\">.<\/span>rsplit<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;.&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token keyword\">in<\/span> ALLOWED_EXTENSIONS<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">UploadForm<\/span><span class=\"token punctuation\">(<\/span>FlaskForm<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token builtin\">file<\/span> <span class=\"token operator\">&#061;<\/span> FileField<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;file&#039;<\/span><span class=\"token punctuation\">,<\/span> validators<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span>DataRequired<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    submit <span class=\"token operator\">&#061;<\/span> SubmitField<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;submit&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token comment\">######\u6ce8\u610f\u8fd9\u4e2a\u540d\u5b57\u5fc5\u987b\u548chtml\u4e0a\u6309\u94ae\u4e00\u81f4<\/span><br \/>\n<span class=\"token decorator annotation punctuation\">&#064;app<span class=\"token punctuation\">.<\/span>route<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/upload&#039;<\/span><span class=\"token punctuation\">,<\/span> methods<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;POST&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;GET&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u6dfb\u52a0\u8def\u7531<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">upload_file<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    _form <span class=\"token operator\">&#061;<\/span> UploadForm<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token comment\">###\u8fd9\u4e2a\u7c7b\u662f\u7528\u4e8e\u4e24\u8fb9\u901a\u4fe1\u7684&#xff0c;\u65b9\u4fbf\u4e24\u8fb9\u9700\u8981<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> request<span class=\"token punctuation\">.<\/span>method <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#039;POST&#039;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> _form<span class=\"token punctuation\">.<\/span>validate_on_submit<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token builtin\">file<\/span> <span class=\"token operator\">&#061;<\/span> _form<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">file<\/span><span class=\"token punctuation\">.<\/span>data<br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token builtin\">file<\/span> <span class=\"token keyword\">and<\/span> allowed_file<span class=\"token punctuation\">(<\/span><span class=\"token builtin\">file<\/span><span class=\"token punctuation\">.<\/span>filename<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> jsonify<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;error&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">1001<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;msg&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u8bf7\u68c0\u67e5\u4e0a\u4f20\u7684\u56fe\u7247\u7c7b\u578b&#xff0c;\u4ec5\u9650\u4e8epng\u3001PNG\u3001jpg\u3001JPG\u3001bmp&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            user_input<span class=\"token operator\">&#061;<\/span>request<span class=\"token punctuation\">.<\/span>form<span class=\"token punctuation\">.<\/span>get<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            filename <span class=\"token operator\">&#061;<\/span> secrets<span class=\"token punctuation\">.<\/span>token_hex<span class=\"token punctuation\">(<\/span><span class=\"token number\">8<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;_&#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token builtin\">file<\/span><span class=\"token punctuation\">.<\/span>filename  <span class=\"token comment\"># \u4f7f\u7528\u5b89\u5168\u7684\u6587\u4ef6\u540d<\/span><\/p>\n<p>            relate_path<span class=\"token operator\">&#061;<\/span>os<span class=\"token punctuation\">.<\/span>path<span class=\"token punctuation\">.<\/span>join<span class=\"token punctuation\">(<\/span>app<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;UPLOAD_FOLDER&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> secure_filename<span class=\"token punctuation\">(<\/span>filename<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            basepath <span class=\"token operator\">&#061;<\/span> os<span class=\"token punctuation\">.<\/span>path<span class=\"token punctuation\">.<\/span>dirname<span class=\"token punctuation\">(<\/span>__file__<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u5f53\u524d\u6587\u4ef6\u6240\u5728\u8def\u5f84<\/span><\/p>\n<p>            upload_path <span class=\"token operator\">&#061;<\/span> os<span class=\"token punctuation\">.<\/span>path<span class=\"token punctuation\">.<\/span>join<span class=\"token punctuation\">(<\/span>basepath<span class=\"token punctuation\">,<\/span> relate_path<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token builtin\">file<\/span><span class=\"token punctuation\">.<\/span>save<span class=\"token punctuation\">(<\/span>upload_path<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token comment\"># if not is_valid_image(upload_path):<\/span><br \/>\n            <span class=\"token comment\">#     os.remove(upload_path)  # \u5982\u679c\u56fe\u7247\u65e0\u6548&#xff0c;\u5220\u9664\u6587\u4ef6<\/span><br \/>\n            <span class=\"token comment\">#     return &#034;Invalid image format or corrupted image.&#034;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> render_template<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;uploaded.html&#039;<\/span><span class=\"token punctuation\">,<\/span> filename<span class=\"token operator\">&#061;<\/span>relate_path<span class=\"token punctuation\">,<\/span>userinput<span class=\"token operator\">&#061;<\/span>user_input<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> render_template<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;upload.html&#039;<\/span><span class=\"token punctuation\">,<\/span>form<span class=\"token operator\">&#061;<\/span>_form<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;app<span class=\"token punctuation\">.<\/span>route<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">main_web<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><span class=\"token comment\">#\u5168\u90e8\u4e3b\u9875\u8bf7\u6c42\u4f1a\u5230\u8fd9<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> render_template<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;upload.html&#039;<\/span><span class=\"token punctuation\">,<\/span>form<span class=\"token operator\">&#061;<\/span>UploadForm<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token comment\">#upload.html\u9875\u9762\u4e2d\u5fc5\u987b\u8981\u6709form&#xff0c;\u6ca1\u6709\u8fd9\u91cc\u5c31\u65b0\u5efa\u4e2a\u7ed9\u8fc7\u53bb<\/span><\/p>\n<p><span class=\"token decorator annotation punctuation\">&#064;app<span class=\"token punctuation\">.<\/span>route<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/uploaded&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">uploaded_file<\/span><span class=\"token punctuation\">(<\/span>filename<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> render_template<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;uploaded.html&#039;<\/span><span class=\"token punctuation\">,<\/span> filename<span class=\"token operator\">&#061;<\/span>filename<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> __name__ <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#039;__main__&#039;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># \u786e\u4fdd\u4e0a\u4f20\u6587\u4ef6\u5939\u5b58\u5728<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> os<span class=\"token punctuation\">.<\/span>path<span class=\"token punctuation\">.<\/span>exists<span class=\"token punctuation\">(<\/span>app<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;UPLOAD_FOLDER&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        os<span class=\"token punctuation\">.<\/span>makedirs<span class=\"token punctuation\">(<\/span>app<span class=\"token punctuation\">.<\/span>config<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;UPLOAD_FOLDER&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token comment\"># \u8bbe\u7f6e\u9759\u6001\u6587\u4ef6\u7f13\u5b58\u8fc7\u671f\u65f6\u95f4<\/span><br \/>\n    app<span class=\"token punctuation\">.<\/span>send_file_max_age_default <span class=\"token operator\">&#061;<\/span> timedelta<span class=\"token punctuation\">(<\/span>seconds<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    app<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>port<span class=\"token operator\">&#061;<\/span><span class=\"token number\">8022<\/span><span class=\"token punctuation\">,<\/span> debug<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h3>2.\u76ee\u5f55\u7ed3\u6784<\/h3>\n<p>app.py\u540c\u7ea7\u76ee\u5f55\u4e0b\u65b0\u5efa2\u4e2a\u6587\u4ef6\u5939&#xff0c;\u5206\u522b\u662ftemplates\u548cuploads&#xff0c;\u4e00\u4e2a\u7528\u6765\u5b58html\u6587\u4ef6&#xff0c;\u4e00\u4e2a\u7528\u6765\u5b58\u56fe\u7247\u3002<\/p>\n<h3>3.html\u9875\u9762\u65b9\u4fbf\u7ed9\u5ba2\u6237\u663e\u793a\u5185\u5bb9<\/h3>\n<p>\u5728templates\u76ee\u5f55\u4e0b\u521b\u5efaupload.html\u548cuploaded.html\u6587\u4ef6\u3002\u4e00\u4e2a\u7528\u4e8e\u7ed9\u7528\u6237\u4e0a\u4f20&#xff0c;\u4e00\u4e2a\u7528\u4e8e\u663e\u793a\u4e0a\u4f20\u7ed3\u679c\u3002 upload.html\u4ee3\u7801\u9644\u4e0b&#xff1a;<\/p>\n<p><span class=\"token operator\">&lt;<\/span>!doctype html<span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token operator\">&lt;<\/span>html lang<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;en&#034;<\/span> xmlns<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;http:\/\/www.w3.org\/1999\/html&#034;<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token operator\">&lt;<\/span>head<span class=\"token operator\">&gt;<\/span><br \/>\n    <span class=\"token operator\">&lt;<\/span>meta charset<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;UTF-8&#034;<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n    <span class=\"token operator\">&lt;<\/span>title<span class=\"token operator\">&gt;<\/span>Upload Image<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>title<span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token operator\">&lt;<\/span><span class=\"token operator\">\/<\/span>head<span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token operator\">&lt;<\/span>body<span class=\"token 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