Node \u662f\u4e00\u4e2a\u670d\u52a1\u5668\u7aef JavaScript \u89e3\u91ca\u5668\uff0c\u5b83\u5c06\u6539\u53d8\u670d\u52a1\u5668\u5e94\u8be5\u5982\u4f55\u5de5\u4f5c\u7684\u6982\u5ff5\u3002\u5b83\u7684\u76ee\u6807\u662f\u5e2e\u52a9\u7a0b\u5e8f\u5458\u6784\u5efa\u9ad8\u5ea6\u53ef\u4f38\u7f29\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u7f16\u5199\u80fd\u591f\u5904\u7406\u6570\u4e07\u6761\u540c\u65f6\u8fde\u63a5\u5230\u4e00\u4e2a\uff08\u53ea\u6709\u4e00\u4e2a\uff09\u7269\u7406\u673a\u7684\u8fde\u63a5\u4ee3\u7801\u3002<\/p>\n
<\/p>\n
\u6e05\u5355 2. Node \u968f\u673a\u6570\u5b57\u751f\u6210\u5668<\/strong> \/\/ The most important line in any Node file. This function \/\/ The response needs to handle all the headers, and the return codes \/\/ Here is some unique-looking code. This is how Node retrives \/\/ These are the generic JavaScript methods that will create \/\/ Write the random number to response \/\/ Node requires us to explicitly end this connection. This is because \/\/ When we create the server, we have to explicitly connect the HTTP server to \/\/ Output a String to the console once the server starts up, letting us know everything \u542f\u52a8\u5e94\u7528\u7a0b\u5e8f \u8bbf\u95ee\u5e94\u7528\u7a0b\u5e8f <\/p>\n \u5b66\u4e60<\/strong><\/p>\n \u83b7\u5f97\u4ea7\u54c1\u548c\u6280\u672f<\/strong><\/p>\n Node \u662f\u4e00\u4e2a\u670d\u52a1\u5668\u7aef JavaScript \u89e3\u91ca\u5668\uff0c\u5b83\u5c06\u6539\u53d8\u670d\u52a1\u5668\u5e94\u8be5\u5982\u4f55\u5de5\u4f5c\u7684\u6982\u5ff5\u3002\u5b83\u7684\u76ee\u6807\u662f\u5e2e\u52a9\u7a0b\u5e8f\u5458\u6784\u5efa\u9ad8\u5ea6\u53ef\u4f38\u7f29\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u7f16\u5199\u80fd\u591f\u5904\u7406\u6570\u4e07\u6761\u540c\u65f6\u8fde\u63a5\u5230\u4e00\u4e2a\uff08\u53ea\u6709\u4e00\u4e2a\uff09\u7269\u7406\u673a\u7684\u8fde\u63a5\u4ee3\u7801\u3002 \u6e05\u5355 2. Node \u968f\u673a\u6570\u5b57\u751f\u6210\u5668 \/\/ these modules need to be imported in order to use them. \/\/ Node has several modules. They are like any #include \/\/ or import statement in other languages var http = require(“http”); var url = require(“url”); \/\/ The most important line in any Node file. … Continue reading Node.js \u7a76\u7adf\u662f\u4ec0\u4e48\uff1f<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[194],"class_list":["post-1210","post","type-post","status-publish","format-standard","hentry","category-linux","tag-node-js"],"_links":{"self":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/1210","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1210"}],"version-history":[{"count":1,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/1210\/revisions"}],"predecessor-version":[{"id":1211,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/1210\/revisions\/1211"}],"wp:attachment":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1210"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1210"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1210"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\/\/ these modules need to be imported in order to use them.
\n\/\/ Node has several modules. They are like any #include
\n\/\/ or import statement in other languages
\nvar http = require(“http”);
\nvar url = require(“url”);<\/p>\n
\n\/\/ does the actual process of creating the server. Technically,
\n\/\/ Node tells the underlying operating system that whenever a
\n\/\/ connection is made, this particular callback function should be
\n\/\/ executed. Since we’re creating a web service with REST API,
\n\/\/ we want an HTTP server, which requires the http variable
\n\/\/ we created in the lines above.
\n\/\/ Finally, you can see that the callback method receives a ‘request’
\n\/\/ and ‘response’ object automatically. This should be familiar
\n\/\/ to any PHP or Java programmer.
\nhttp.createServer(function(request, response) {<\/p>\n
\n\/\/ These types of things are handled automatically in server programs
\n\/\/ like Apache and Tomcat, but Node requires everything to be done yourself
\nresponse.writeHead(200, {“Content-Type”: “text\/plain”});<\/p>\n
\n\/\/ parameters passed in from client requests. The url module
\n\/\/ handles all these functions. The parse function
\n\/\/ deconstructs the URL, and places the query key-values in the
\n\/\/ query object. We can find the value for the “number” key
\n\/\/ by referencing it directly – the beauty of JavaScript.
\nvar params = url.parse(request.url, true).query;
\nvar input = params.number;<\/p>\n
\n\/\/ our random number that gets passed back to the caller
\nvar numInput = new Number(input);
\nvar numOutput = new Number(Math.random() * numInput).toFixed(0);<\/p>\n
\nresponse.write(numOutput);<\/p>\n
\n\/\/ Node allows you to keep a connection open and pass data back and forth,
\n\/\/ though that advanced topic isn’t discussed in this article.
\nresponse.end();<\/p>\n
\n\/\/ a port. Standard HTTP port is 80, so we’ll connect it to that one.
\n}).listen(80);<\/p>\n
\n\/\/ starts up correctly
\nconsole.log(“Random Number Generator Running…”);<\/p>\n
\n\u5c06\u4e0a\u9762\u7684\u4ee3\u7801\u653e\u5165\u4e00\u4e2a\u540d\u4e3a \u201crandom.js\u201d \u7684\u6587\u4ef6\u4e2d\u3002\u73b0\u5728\uff0c\u8981\u542f\u52a8\u8fd9\u4e2a\u5e94\u7528\u7a0b\u5e8f\u5e76\u8fd0\u884c\u5b83\uff08\u4ee5\u4fbf\u521b\u5efa HTTP \u670d\u52a1\u5668\u5e76\u76d1\u542c\u7aef\u53e3 80 \u4e0a\u7684\u8fde\u63a5\uff09\uff0c\u53ea\u9700\u5728\u60a8\u7684\u547d\u4ee4\u63d0\u793a\u4e2d\u8f93\u5165\u4ee5\u4e0b\u547d\u4ee4\uff1a% node random.js\u3002\u4e0b\u9762\u662f\u670d\u52a1\u5668\u5df2\u7ecf\u542f\u52a8\u5e76\u8fd0\u884c\u65f6\u770b\u8d77\u6765\u7684\u6837\u5b50\uff1a
\nroot@ubuntu:\/home\/moila\/ws\/mike# node random.js
\nRandom Number Generator Running…<\/p>\n
\n\u5e94\u7528\u7a0b\u5e8f\u5df2\u7ecf\u542f\u52a8\u5e76\u8fd0\u884c\u3002Node \u6b63\u5728\u76d1\u542c\u6240\u6709\u8fde\u63a5\uff0c\u6211\u4eec\u6765\u6d4b\u8bd5\u4e00\u4e0b\u3002\u7531\u4e8e\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u7b80\u5355\u7684 RESTful API\uff0c\u6240\u4ee5\u53ef\u4ee5\u4f7f\u7528 Web \u6d4f\u89c8\u5668\u6765\u8bbf\u95ee\u8fd9\u4e2a\u5e94\u7528\u7a0b\u5e8f\u3002\u952e\u5165\u4ee5\u4e0b\u5730\u5740\uff08\u786e\u4fdd\u60a8\u5df2\u5b8c\u6210\u4e86\u4e0a\u9762\u7684\u6b65\u9aa4\uff09\uff1ahttp:\/\/localhost\/?number=27\u3002
\n\u60a8\u7684\u6d4f\u89c8\u5668\u7a97\u53e3\u5c06\u66f4\u6539\u5230\u4e00\u4e2a\u4ecb\u4e8e 0 \u5230 27 \u4e4b\u95f4\u7684\u968f\u673a\u6570\u5b57\u3002\u5355\u51fb\u6d4f\u89c8\u5668\u4e0a\u7684 \u201c\u91cd\u65b0\u8f7d\u5165\u201d \u6309\u94ae\uff0c\u60a8\u4f1a\u5f97\u5230\u53e6\u4e00\u4e2a\u968f\u673a\u6570\u5b57\u3002\u5c31\u662f\u8fd9\u6837\uff0c\u8fd9\u5c31\u662f\u60a8\u7684\u7b2c\u4e00\u4e2a Node \u5e94\u7528\u7a0b\u5e8f\uff01<\/p>\n\n
\n