{"id":791,"date":"2015-02-27T16:50:06","date_gmt":"2015-02-27T08:50:06","guid":{"rendered":"http:\/\/www.daliane.com\/?p=791"},"modified":"2015-02-28T14:46:24","modified_gmt":"2015-02-28T06:46:24","slug":"node_js_zui_jian_dan_de_express_ying_yong","status":"publish","type":"post","link":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/node_js_zui_jian_dan_de_express_ying_yong\/","title":{"rendered":"node.js\u6700\u7b80\u5355\u7684 express \u5e94\u7528"},"content":{"rendered":"<p>\u6309\u7167\u60ef\u4f8b\uff0c\u6211\u4eec\u6765\u4e2a helloworld \u5165\u95e8\u3002<\/p>\n<p>express \u662f Node.js \u5e94\u7528\u6700\u5e7f\u6cdb\u7684 web \u6846\u67b6\uff0c\u73b0\u5728\u662f 4.x \u7248\u672c\uff0c\u5b83\u975e\u5e38\u8584\u3002\u8ddf Rails \u6bd4\u8d77\u6765\uff0c\u5b8c\u5168\u4e24\u4e2a\u6781\u7aef\u3002<\/p>\n<p>express \u7684\u5b98\u7f51\u662f <a href=\"http:\/\/expressjs.com\/\">http:\/\/expressjs.com\/<\/a> \uff0c\u6211\u5e38\u5e38\u4e0a\u53bb\u770b\u5b83\u7684 API\u3002<\/p>\n<p>\u9996\u5148\u6211\u4eec\u9700\u8981\u5f97\u5230\u4e00\u4e2a express\u3002<\/p>\n<p>\u4ece php \u548c python \u6765\u7684\u540c\u5b66\u53ef\u80fd\u5bf9\u4e8e\u201c\u5305\u4f9d\u8d56\u7ba1\u7406\u201d\u7684\u6982\u5ff5\u4e0d\u662f\u592a\u719f\u6089\uff0cruby \u6765\u7684\u540c\u5b66\u5e94\u8be5\u5c31\u719f\u6089\u591a\u4e86\u3002<\/p>\n<p>\u5728 python \u4e2d\uff0c\u5305\u7ba1\u7406\u4f7f\u7528 <code>easy_install<\/code> \u6216\u8005 <code>pip<\/code>\uff0cruby \u4e2d\u6211\u4eec\u4f7f\u7528 <code>gem<\/code>\u3002\u800c\u5728 Node.js \u4e2d\uff0c\u5bf9\u5e94\u5c31\u662f <code>npm<\/code>\uff0cnpm \u662f<code>Node.js Package Manager<\/code> \u7684\u610f\u601d\u3002<\/p>\n<p>\u5b89\u88c5npm<\/p>\n<p>\u65b9\u6cd5\u4e00\uff1a<\/p>\n<p>NPM\u7684\u5b98\u7f51\uff08<a href=\"http:\/\/npmjs.org\/\">http:\/\/npmjs.org\/<\/a>\uff09\u4e0a\u4ecb\u7ecd\u7684\u90a3\u6837\uff0c\u5b89\u88c5NPM\u4ec5\u4ec5\u662f\u4e00\u884c\u547d\u4ee4\u7684\u4e8b\u60c5\uff1a<\/p>\n<pre>curl http:\/\/npmjs.org\/install.sh | sh<\/pre>\n<p>\u8fd9\u91cc\u8be6\u89e3\u4e00\u4e0b\u8fd9\u53e5\u547d\u4ee4\u7684\u610f\u601d\uff0ccurl http:\/\/npmjs.org\/install.sh\u662f\u901a\u8fc7curl\u547d\u4ee4\u83b7\u53d6\u8fd9\u4e2a\u5b89\u88c5shell\u811a\u672c\uff0c\u6309\u540e\u901a\u8fc7\u7ba1\u9053\u7b26| \u5c06\u83b7\u53d6\u7684\u811a\u672c\u4ea4\u7531sh\u547d\u4ee4\u6765\u6267\u884c\u3002\u8fd9\u91cc\u5982\u679c\u6ca1\u6709\u6743\u9650\u4f1a\u5b89\u88c5\u4e0d\u6210\u529f\uff0c\u9700\u8981\u52a0\u4e0asudo\u6765\u786e\u4fdd\u6743\u9650\uff1a<\/p>\n<pre>curl http:\/\/npmjs.org\/install.sh | sudo sh<\/pre>\n<p>\u5b89\u88c5\u6210\u529f\u540e\u6267\u884cnpm\u547d\u4ee4\uff0c\u4f1a\u5f97\u5230\u4e00\u4e0b\u7684\u63d0\u793a\uff1a<\/p>\n<pre>Usage: npm &lt;command&gt; \r\nwhere &lt;command&gt; is one of: \r\nadduser, apihelp, author, bin, bugs, c, cache, completion, \r\nconfig, deprecate, docs, edit, explore, faq, find, get, \r\nhelp, help-search, home, i, info, init, install, la, link, \r\nlist, ll, ln, ls, outdated, owner, pack, prefix, prune, \r\npublish, r, rb, rebuild, remove, restart, rm, root, \r\nrun-script, s, se, search, set, show, star, start, stop, \r\nsubmodule, tag, test, un, uninstall, unlink, unpublish, \r\nunstar, up, update, version, view, whoami<\/pre>\n<p>\u6211\u4eec\u4ee5underscore\u4e3a\u4f8b\uff0c\u6765\u5c55\u793a\u4e0b\u901a\u8fc7npm\u5b89\u88c5\u7b2c\u4e09\u65b9\u5305\u7684\u8fc7\u7a0b\u3002<\/p>\n<pre>npm install underscore<\/pre>\n<p>\u8fd4\u56de\uff1a<\/p>\n<pre>underscore@1.2.2 .\/node_modules\/underscore \r\n\u65b9\u6cd5\u4e8c\uff1a<\/pre>\n<pre><code>$ mkdir lesson1 &amp;&amp; cd lesson1\r\n# \u8fd9\u91cc\u6ca1\u6709\u4ece\u5b98\u65b9 npm \u5b89\u88c5\uff0c\u800c\u662f\u4f7f\u7528\u4e86\u5927\u6dd8\u5b9d\u7684 npm \u955c\u50cf\r\n$ npm install express --registry=https:\/\/registry.npm.taobao.org\r\n\r\n\u65b9\u6cd5\u4e09\uff1a\r\n\u6ce8\u610f\u52a0\u4e2a-L\r\ncurl -L https:\/\/npmjs.org\/install.sh | sh\r\n<\/code><\/pre>\n<pre>\u901a\u8fc7\u4ee5\u4e0a\u65b9\u6cd5\u8fd8\u6ca1\u6709\u5b89\u88c5\u6210\u529f\uff0c\u53ea\u80fd\u8bf4\u4f60\u70b9\u592a\u80cc\u3002<\/pre>\n<pre><code>\u00a0<a href=\"http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/31.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-796\" src=\"http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/31-300x81.jpg\" alt=\"3\" width=\"300\" height=\"81\" srcset=\"http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/31-300x81.jpg 300w, http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/31.jpg 488w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>\r\n\r\n<\/code><\/pre>\n<p>\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u7684 lesson1 \u76ee\u5f55\u4e0b\u5e94\u8be5\u4f1a\u51fa\u73b0\u4e00\u4e2a <code>node_modules<\/code> \u6587\u4ef6\u5939\uff0c<code>ls<\/code> \u770b\u770b<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/13.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-802\" src=\"http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/13-300x238.jpg\" alt=\"1\" width=\"300\" height=\"238\" srcset=\"http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/13-300x238.jpg 300w, http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/13.jpg 658w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<pre><code>$ ls node_modules\r\n<\/code><\/pre>\n<p>\u91cc\u9762\u5982\u679c\u51fa\u73b0 express \u6587\u4ef6\u5939\u5219\u8bf4\u660e\u5b89\u88c5\u6210\u529f\u3002<\/p>\n<p>\u6216\u8005 npm\u547d\u4ee4\u63d0\u4f9b\u66f4\u6e05\u6670\u76f4\u89c2\u7684\u663e\u793a:<\/p>\n<pre><code>$ npm list\r\n<\/code><\/pre>\n<p>\u6211\u4eec\u7ee7\u7eed\u5e94\u7528\u7a0b\u5e8f\u7684\u7f16\u5199\u3002<\/p>\n<p>\u65b0\u5efa\u4e00\u4e2a app.js \u6587\u4ef6<\/p>\n<pre><code>$ touch app.js\r\n<\/code><\/pre>\n<p>copy \u8fdb\u53bb\u8fd9\u4e9b\u4ee3\u7801<\/p>\n<div class=\"highlight highlight-js\">\n<blockquote>\n<pre><span class=\"pl-c\">\/\/ \u8fd9\u53e5\u7684\u610f\u601d\u5c31\u662f\u5f15\u5165 `express` \u6a21\u5757\uff0c\u5e76\u5c06\u5b83\u8d4b\u4e88 `express` \u8fd9\u4e2a\u53d8\u91cf\u7b49\u5f85\u4f7f\u7528\u3002<\/span>\r\n<span class=\"pl-s\">var<\/span> express <span class=\"pl-k\">=<\/span> <span class=\"pl-s3\">require<\/span>(<span class=\"pl-s1\"><span class=\"pl-pds\">'<\/span>express<span class=\"pl-pds\">'<\/span><\/span>);\r\n<span class=\"pl-c\">\/\/ \u8c03\u7528 express \u5b9e\u4f8b\uff0c\u5b83\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u4e0d\u5e26\u53c2\u6570\u8c03\u7528\u65f6\uff0c\u4f1a\u8fd4\u56de\u4e00\u4e2a express \u5b9e\u4f8b\uff0c\u5c06\u8fd9\u4e2a\u53d8\u91cf\u8d4b\u4e88 app \u53d8\u91cf\u3002<\/span>\r\n<span class=\"pl-s\">var<\/span> app <span class=\"pl-k\">=<\/span> express();\r\n\r\n<span class=\"pl-c\">\/\/ app \u672c\u8eab\u6709\u5f88\u591a\u65b9\u6cd5\uff0c\u5176\u4e2d\u5305\u62ec\u6700\u5e38\u7528\u7684 get\u3001post\u3001put\/patch\u3001delete\uff0c\u5728\u8fd9\u91cc\u6211\u4eec\u8c03\u7528\u5176\u4e2d\u7684 get \u65b9\u6cd5\uff0c\u4e3a\u6211\u4eec\u7684 `\/` \u8def\u5f84\u6307\u5b9a\u4e00\u4e2a handler \u51fd\u6570\u3002<\/span>\r\n<span class=\"pl-c\">\/\/ \u8fd9\u4e2a handler \u51fd\u6570\u4f1a\u63a5\u6536 req \u548c res \u4e24\u4e2a\u5bf9\u8c61\uff0c\u4ed6\u4eec\u5206\u522b\u662f\u8bf7\u6c42\u7684 request \u548c response\u3002<\/span>\r\n<span class=\"pl-c\">\/\/ request \u4e2d\u5305\u542b\u4e86\u6d4f\u89c8\u5668\u4f20\u6765\u7684\u5404\u79cd\u4fe1\u606f\uff0c\u6bd4\u5982 query \u554a\uff0cbody \u554a\uff0cheaders \u554a\u4e4b\u7c7b\u7684\uff0c\u90fd\u53ef\u4ee5\u901a\u8fc7 req \u5bf9\u8c61\u8bbf\u95ee\u5230\u3002<\/span>\r\n<span class=\"pl-c\">\/\/ res \u5bf9\u8c61\uff0c\u6211\u4eec\u4e00\u822c\u4e0d\u4ece\u91cc\u9762\u53d6\u4fe1\u606f\uff0c\u800c\u662f\u901a\u8fc7\u5b83\u6765\u5b9a\u5236\u6211\u4eec\u5411\u6d4f\u89c8\u5668\u8f93\u51fa\u7684\u4fe1\u606f\uff0c\u6bd4\u5982 header \u4fe1\u606f\uff0c\u6bd4\u5982\u60f3\u8981\u5411\u6d4f\u89c8\u5668\u8f93\u51fa\u7684\u5185\u5bb9\u3002\u8fd9\u91cc\u6211\u4eec\u8c03\u7528\u4e86\u5b83\u7684 #send \u65b9\u6cd5\uff0c\u5411\u6d4f\u89c8\u5668\u8f93\u51fa\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/span>\r\napp.get(<span class=\"pl-s1\"><span class=\"pl-pds\">'<\/span>\/<span class=\"pl-pds\">'<\/span><\/span>, <span class=\"pl-st\">function<\/span> (<span class=\"pl-vpf\">req<\/span>, <span class=\"pl-vpf\">res<\/span>) {\r\n  res.<span class=\"pl-s3\">send<\/span>(<span class=\"pl-s1\"><span class=\"pl-pds\">'www.daliane.com  node.js <\/span>Hello World<span class=\"pl-pds\">'<\/span><\/span>);\r\n});\r\n\r\n<span class=\"pl-c\">\/\/ \u5b9a\u4e49\u597d\u6211\u4eec app \u7684\u884c\u4e3a\u4e4b\u540e\uff0c\u8ba9\u5b83\u76d1\u542c\u672c\u5730\u7684 3000 \u7aef\u53e3\u3002\u8fd9\u91cc\u7684\u7b2c\u4e8c\u4e2a\u51fd\u6570\u662f\u4e2a\u56de\u8c03\u51fd\u6570\uff0c\u4f1a\u5728 listen \u52a8\u4f5c\u6210\u529f\u540e\u6267\u884c\uff0c\u6211\u4eec\u8fd9\u91cc\u6267\u884c\u4e86\u4e00\u4e2a\u547d\u4ee4\u884c\u8f93\u51fa\u64cd\u4f5c\uff0c\u544a\u8bc9\u6211\u4eec\u76d1\u542c\u52a8\u4f5c\u5df2\u5b8c\u6210\u3002<\/span>\r\napp.listen(8080, <span class=\"pl-st\">function<\/span> () {\r\n  <span class=\"pl-en\">console<\/span><span class=\"pl-s3\">.log<\/span>(<span class=\"pl-s1\"><span class=\"pl-pds\">'<\/span>app is listening at port 8080<span class=\"pl-pds\">'<\/span><\/span>);\r\n});<\/pre>\n<\/blockquote>\n<\/div>\n<p>\u6267\u884c<\/p>\n<p><code>$ node app.js<\/code><\/p>\n<p>\u8fd9\u65f6\u5019\u6211\u4eec\u7684 app \u5c31\u8dd1\u8d77\u6765\u4e86\uff0c\u7ec8\u7aef\u4e2d\u4f1a\u8f93\u51fa <code>app is listening at port 8080<\/code>\u3002\u8fd9\u65f6\u6211\u4eec\u6253\u5f00\u6d4f\u89c8\u5668\uff0c\u8bbf\u95ee<code>http:\/\/localhost:8080\/<\/code>\uff0c\u4f1a\u51fa\u73b0 <code>Hello World<\/code>\u3002\u5982\u679c\u6ca1\u6709\u51fa\u73b0\u7684\u8bdd\uff0c\u80af\u5b9a\u662f\u4e0a\u8ff0\u54ea\u4e00\u6b65\u5f04\u9519\u4e86\uff0c\u81ea\u5df1\u8c03\u8bd5\u4e00\u4e0b\u3002<\/p>\n<p><a href=\"http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/32.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-806\" src=\"http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/32-300x106.jpg\" alt=\"3\" width=\"300\" height=\"106\" srcset=\"http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/32-300x106.jpg 300w, http:\/\/www.daliane.com\/wp-content\/uploads\/2015\/02\/32.jpg 794w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<pre><code>\u00a0<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6309\u7167\u60ef\u4f8b\uff0c\u6211\u4eec\u6765\u4e2a helloworld \u5165\u95e8\u3002 express \u662f Node.js \u5e94\u7528\u6700\u5e7f\u6cdb\u7684 web \u6846&#8230;<\/p>\n","protected":false},"author":2,"featured_media":802,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[38,60],"tags":[233,66],"_links":{"self":[{"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/posts\/791"}],"collection":[{"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/comments?post=791"}],"version-history":[{"count":10,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/posts\/791\/revisions"}],"predecessor-version":[{"id":808,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/posts\/791\/revisions\/808"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/media\/802"}],"wp:attachment":[{"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/media?parent=791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/categories?post=791"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.daliane.com\/category\/jinjiaoyou\/wp-json\/wp\/v2\/tags?post=791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}