{"id":181,"date":"2026-06-17T19:40:22","date_gmt":"2026-06-17T11:40:22","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=181"},"modified":"2026-06-17T19:40:22","modified_gmt":"2026-06-17T11:40:22","slug":"flask-%e9%94%99%e8%af%af%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2026\/06\/17\/flask-%e9%94%99%e8%af%af%e5%a4%84%e7%90%86\/","title":{"rendered":"Flask \u9519\u8bef\u5904\u7406"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728 Web \u5f00\u53d1\u4e2d\uff0c\u9519\u8bef\u662f\u4e0d\u53ef\u907f\u514d\u7684\uff08\u5982\u7528\u6237\u8bbf\u95ee\u4e86\u4e0d\u5b58\u5728\u7684\u9875\u9762\u3001\u670d\u52a1\u5668\u5185\u90e8\u51fa\u9519\u3001\u6570\u636e\u683c\u5f0f\u9519\u8bef\u7b49\uff09\u3002Flask \u63d0\u4f9b\u4e86\u4f18\u96c5\u7684\u9519\u8bef\u5904\u7406\u673a\u5236\uff0c\u5141\u8bb8\u4f60\u81ea\u5b9a\u4e49\u9519\u8bef\u54cd\u5e94\uff0c\u800c\u4e0d\u662f\u5411\u7528\u6237\u5c55\u793a\u4e11\u964b\u7684\u9ed8\u8ba4\u62a5\u9519\u9875\u9762\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u826f\u597d\u7684\u9519\u8bef\u5904\u7406\u4e0d\u4ec5\u80fd\u63d0\u5347\u7528\u6237\u4f53\u9a8c\uff0c\u8fd8\u80fd\u5e2e\u52a9\u5f00\u53d1\u8005\u5feb\u901f\u5b9a\u4f4d\u95ee\u9898\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u5e38\u89c1\u7684 HTTP \u9519\u8bef\u7801<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5904\u7406\u9519\u8bef\u524d\uff0c\u5148\u4e86\u89e3\u51e0\u4e2a\u6700\u5e38\u89c1\u7684\u72b6\u6001\u7801\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>400 Bad Request<\/strong>: \u8bf7\u6c42\u8bed\u6cd5\u9519\u8bef\u6216\u53c2\u6570\u7f3a\u5931\u3002<\/li>\n\n\n\n<li><strong>401 Unauthorized<\/strong>: \u672a\u8ba4\u8bc1\uff08\u672a\u767b\u5f55\u6216 Token \u65e0\u6548\uff09\u3002<\/li>\n\n\n\n<li><strong>403 Forbidden<\/strong>: \u5df2\u8ba4\u8bc1\u4f46\u6743\u9650\u4e0d\u8db3\u3002<\/li>\n\n\n\n<li><strong>404 Not Found<\/strong>: \u8bf7\u6c42\u7684\u8d44\u6e90\u4e0d\u5b58\u5728\u3002<\/li>\n\n\n\n<li><strong>500 Internal Server Error<\/strong>: \u670d\u52a1\u5668\u5185\u90e8\u4ee3\u7801\u51fa\u9519\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u6ce8\u518c\u9519\u8bef\u5904\u7406\u5668<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528 <code>@app.errorhandler()<\/code> \u88c5\u9970\u5668\u53ef\u4ee5\u6355\u83b7\u7279\u5b9a\u7684\u9519\u8bef\u7801\u6216\u5f02\u5e38\u7c7b\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">A. \u5904\u7406\u7279\u5b9a HTTP \u9519\u8bef (\u5982 404, 403)<\/h4>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><span>11<\/span><span>12<\/span><span>13<\/span><span>14<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">from flask import render_template, jsonify\n\n# \u5904\u7406 404 \u9519\u8bef\n@app.errorhandler(404)\ndef not_found(error):\n    # \u5982\u679c\u662f API \u8bf7\u6c42\uff0c\u8fd4\u56de JSON\uff1b\u5982\u679c\u662f\u7f51\u9875\uff0c\u8fd4\u56de HTML\n    if request.accept_mimetypes.best == &#039;application\/json&#039;:\n        return jsonify({&quot;error&quot;: &quot;Resource not found&quot;}), 404\n    return render_template(&#039;errors\/404.html&#039;), 404\n\n# \u5904\u7406 403 \u9519\u8bef\n@app.errorhandler(403)\ndef forbidden(error):\n    return render_template(&#039;errors\/403.html&#039;), 403<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">B. \u5904\u7406\u901a\u7528\u5f02\u5e38 (\u5982 500)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e 500 \u9519\u8bef\u6216\u5176\u4ed6\u672a\u6355\u83b7\u7684 Python \u5f02\u5e38\uff0c\u6211\u4eec\u53ef\u4ee5\u6ce8\u518c\u4e00\u4e2a\u901a\u7528\u7684\u5904\u7406\u5668\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">@app.errorhandler(500)\ndef internal_error(error):\n    # \u26a0\ufe0f \u91cd\u8981\uff1a\u5728 500 \u9519\u8bef\u4e2d\uff0c\u901a\u5e38\u9700\u8981\u56de\u6eda\u6570\u636e\u5e93\u4f1a\u8bdd\uff0c\u9632\u6b62\u4e8b\u52a1\u9501\u6b7b\n    db.session.rollback() \n    return render_template(&#039;errors\/500.html&#039;), 500<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">C. \u6355\u83b7\u7279\u5b9a Python \u5f02\u5e38<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f60\u53ef\u4ee5\u76f4\u63a5\u6355\u83b7 Python \u5185\u7f6e\u5f02\u5e38\u6216\u81ea\u5b9a\u4e49\u5f02\u5e38\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">@app.errorhandler(ValueError)\ndef handle_value_error(error):\n    return jsonify({&quot;error&quot;: &quot;Invalid value provided&quot;, &quot;message&quot;: str(error)}), 400\n\n@app.errorhandler(Exception)\ndef handle_generic_exception(error):\n    # \u6355\u83b7\u6240\u6709\u672a\u88ab\u5176\u4ed6\u5904\u7406\u5668\u5904\u7406\u7684\u5f02\u5e38\n    app.logger.error(f&#039;Unhandled Exception: {str(error)}&#039;)\n    return jsonify({&quot;error&quot;: &quot;Internal Server Error&quot;}), 500<\/code><\/pre><\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u4e3b\u52a8\u629b\u51fa\u9519\u8bef<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e1a\u52a1\u903b\u8f91\u4e2d\uff0c\u5f53\u53d1\u73b0\u6570\u636e\u4e0d\u7b26\u5408\u8981\u6c42\u65f6\uff0c\u4f60\u53ef\u4ee5\u4e3b\u52a8\u629b\u51fa HTTP \u5f02\u5e38\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528 <code>abort()<\/code><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u6700\u5e38\u7528\u7684\u65b9\u5f0f\uff0c\u5b83\u4f1a\u7acb\u5373\u4e2d\u65ad\u5f53\u524d\u8bf7\u6c42\u5e76\u89e6\u53d1\u5bf9\u5e94\u7684\u9519\u8bef\u5904\u7406\u5668\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">from flask import abort\n\n@app.route(&#039;\/user\/&lt;int:user_id&gt;&#039;)\ndef get_user(user_id):\n    user = User.query.get(user_id)\n    if not user:\n        abort(404)  # \u89e6\u53d1 @app.errorhandler(404)\n    return jsonify(user.to_dict())<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u65b9\u6cd5\u4e8c\uff1a\u8fd4\u56de\u5143\u7ec4<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u4e0d\u60f3\u89e6\u53d1\u5168\u5c40\u9519\u8bef\u5904\u7406\u5668\uff0c\u53ea\u60f3\u5728\u5f53\u524d\u89c6\u56fe\u8fd4\u56de\u9519\u8bef\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fd4\u56de\u5143\u7ec4\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">@app.route(&#039;\/api\/data&#039;)\ndef get_data():\n    data = request.get_json()\n    if not data:\n        return jsonify({&quot;error&quot;: &quot;No data provided&quot;}), 400\n    # ...<\/code><\/pre><\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">4. \u84dd\u56fe\u4e2d\u7684\u9519\u8bef\u5904\u7406<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u4f7f\u7528\u84dd\u56fe\u6a21\u5757\u5316\u5f00\u53d1\uff0c\u4e5f\u53ef\u4ee5\u5728\u84dd\u56fe\u4e2d\u5b9a\u4e49\u9519\u8bef\u5904\u7406\u5668\u3002<strong>\u6ce8\u610f\uff1a\u84dd\u56fe\u4e2d\u7684\u9519\u8bef\u5904\u7406\u5668\u53ea\u5bf9\u8be5\u84dd\u56fe\u5185\u7684\u8def\u7531\u751f\u6548\u3002<\/strong><\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><span>11<\/span><span>12<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\"># api_bp.py\nfrom flask import Blueprint, jsonify\n\napi_bp = Blueprint(&#039;api&#039;, __name__)\n\n@api_bp.errorhandler(404)\ndef api_not_found(error):\n    return jsonify({&quot;error&quot;: &quot;API endpoint not found&quot;}), 404\n\n@api_bp.errorhandler(500)\ndef api_internal_error(error):\n    return jsonify({&quot;error&quot;: &quot;API internal error&quot;}), 500<\/code><\/pre><\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">5. \u6700\u4f73\u5b9e\u8df5\u4e0e\u6ce8\u610f\u4e8b\u9879<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 1. \u533a\u5206 API \u548c\u7f51\u9875\u54cd\u5e94<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u4ee3\u5e94\u7528\u901a\u5e38\u662f\u524d\u540e\u7aef\u5206\u79bb\u7684\u3002\u5efa\u8bae\u6839\u636e\u8bf7\u6c42\u5934\u5224\u65ad\u8fd4\u56de JSON \u8fd8\u662f HTML\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">def wants_json_response():\n    return request.accept_mimetypes.best == &#039;application\/json&#039;\n\n@app.errorhandler(404)\ndef not_found(error):\n    if wants_json_response():\n        return jsonify(error=&quot;Not Found&quot;), 404\n    return render_template(&#039;404.html&#039;), 404<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 2. \u8bb0\u5f55\u65e5\u5fd7 (Logging)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u8981\u541e\u6389\u9519\u8bef\uff01\u5728 500 \u9519\u8bef\u5904\u7406\u5668\u4e2d\uff0c\u52a1\u5fc5\u8bb0\u5f55\u8be6\u7ec6\u7684\u5806\u6808\u4fe1\u606f\uff0c\u65b9\u4fbf\u6392\u67e5 Bug\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">import logging\n@app.errorhandler(500)\ndef handle_500(error):\n    app.logger.exception(&quot;An unhandled exception occurred.&quot;) # \u8bb0\u5f55\u5b8c\u6574\u5806\u6808\n    return &quot;Something went wrong on our end.&quot;, 500<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 3. \u6570\u636e\u5e93\u56de\u6eda<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 500 \u9519\u8bef\u53d1\u751f\u65f6\uff0c\u5f53\u524d\u7684\u6570\u636e\u5e93\u4e8b\u52a1\u53ef\u80fd\u5904\u4e8e\u4e0d\u4e00\u81f4\u72b6\u6001\u3002<strong>\u52a1\u5fc5\u8c03\u7528 <code>db.session.rollback()<\/code><\/strong>\uff0c\u5426\u5219\u540e\u7eed\u7684\u8bf7\u6c42\u53ef\u80fd\u4f1a\u56e0\u4e3a\u6570\u636e\u5e93\u9501\u6216\u810f\u6570\u636e\u800c\u5931\u8d25\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 4. \u4e0d\u8981\u6cc4\u9732\u654f\u611f\u4fe1\u606f<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u751f\u4ea7\u73af\u5883\u4e2d\uff0c<strong>\u7edd\u5bf9\u4e0d\u8981<\/strong>\u5c06\u8be6\u7ec6\u7684\u9519\u8bef\u5806\u6808\uff08Traceback\uff09\u76f4\u63a5\u8fd4\u56de\u7ed9\u524d\u7aef\u7528\u6237\u3002\u8fd9\u4f1a\u88ab\u9ed1\u5ba2\u5229\u7528\u6765\u653b\u51fb\u4f60\u7684\u7cfb\u7edf\u3002Flask \u9ed8\u8ba4\u5728 <code>debug=False<\/code> \u65f6\u4f1a\u9690\u85cf\u8be6\u7ec6\u9519\u8bef\u4fe1\u606f\uff0c\u4f46\u4f60\u4ecd\u9700\u5728\u81ea\u5b9a\u4e49\u5904\u7406\u5668\u4e2d\u786e\u4fdd\u53ea\u8fd4\u56de\u901a\u7528\u7684\u9519\u8bef\u63d0\u793a\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udcdd \u603b\u7ed3\u6a21\u677f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u4e00\u4e2a\u6807\u51c6\u7684\u751f\u4ea7\u7ea7\u9519\u8bef\u5904\u7406\u7ed3\u6784\uff1a<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><span>11<\/span><span>12<\/span><span>13<\/span><span>14<\/span><span>15<\/span><span>16<\/span><span>17<\/span><span>18<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">from flask import jsonify, render_template\nimport logging\n\nlogger = logging.getLogger(__name__)\n\n@app.errorhandler(404)\ndef not_found(e):\n    return jsonify({&quot;code&quot;: 404, &quot;msg&quot;: &quot;Resource not found&quot;}), 404\n\n@app.errorhandler(400)\ndef bad_request(e):\n    return jsonify({&quot;code&quot;: 400, &quot;msg&quot;: &quot;Bad request&quot;}), 400\n\n@app.errorhandler(500)\ndef internal_server_error(e):\n    db.session.rollback() # \u56de\u6eda\u6570\u636e\u5e93\n    logger.exception(&quot;Server Error&quot;) # \u8bb0\u5f55\u65e5\u5fd7\n    return jsonify({&quot;code&quot;: 500, &quot;msg&quot;: &quot;Internal server error&quot;}), 500<\/code><\/pre><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u638c\u63e1\u4e86\u9519\u8bef\u5904\u7406\uff0c\u4f60\u7684 Flask \u5e94\u7528\u5c31\u53d8\u5f97\u66f4\u52a0\u5065\u58ee\u548c\u4e13\u4e1a\u4e86\u3002\u63a5\u4e0b\u6765\uff0c\u4f60\u60f3\u5b66\u4e60\u5982\u4f55<strong>\u90e8\u7f72 Flask \u5e94\u7528\u5230\u751f\u4ea7\u73af\u5883<\/strong>\uff08\u5982\u4f7f\u7528 Gunicorn + Nginx\uff09\uff0c\u8fd8\u662f\u5b66\u4e60\u5982\u4f55\u7f16\u5199<strong>\u5355\u5143\u6d4b\u8bd5<\/strong>\uff1f<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Web \u5f00\u53d1\u4e2d\uff0c\u9519\u8bef\u662f\u4e0d\u53ef\u907f\u514d\u7684\uff08\u5982\u7528\u6237\u8bbf\u95ee\u4e86\u4e0d\u5b58\u5728\u7684\u9875&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-181","post","type-post","status-publish","format-standard","hentry","category-flask-"],"_links":{"self":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/181","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/comments?post=181"}],"version-history":[{"count":1,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/181\/revisions"}],"predecessor-version":[{"id":182,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/181\/revisions\/182"}],"wp:attachment":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/media?parent=181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/categories?post=181"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/tags?post=181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}