本文共 3446 字，大约阅读时间需要 11 分钟。
作为一个好的Restfull Api不仅在于service url的语义,可读性,幂等,正交，作为http状态码也很重要，一个好的Http Status Code给使用者一个很好的响应，比如200表示正常成功，201表示创建成功，409冲突，404资源不存在等等。所以在做一个基于node.js+mongodb+angularjs的demo时发现node.js express没有提供相应的辅助类，但是本人不喜欢将201,404这类毫无语言层次语义的东西到处充斥着，所以最后决定自己写一个，但是同时本人也很懒，不喜欢做重复的苦力活，怎么办？那就从我最熟悉的c#中HttpStatusCode枚举中copy出来吧，最后为了简便在mac上所以采用了利用node.js去解析msdn关于httpstatuscode的文档生成node.js的辅助类。
代码很简单：
var http = require('http');
var fs = require('fs');
var $ = require('jquery');
var output = "httpStatusCode/index.js";
(function(){
String.format = function() {
var s = arguments[0];
for (var i = 0; i < arguments.length - 1; i++) {
var reg = new RegExp("\\{" + i + "\\}", "gm");
s = s.replace(reg, arguments[i + 1]);
}
return s;
};
var options = {
host:'msdn.microsoft.com',
port:80,
path:'/zh-cn/library/system.net.httpstatuscode.aspx'
};
http.get(options,function (response) {
var html = "";
response.on("data",function (chunk) {
html += chunk;
}).on("end", function () {
handler(html);
}).on('error', function (e) {
console.log("Got error: " + e.message);
});
function getHttpStatusCode(htmlString) {
var $doc = $(html);
var rows = $doc.find("table#memberList tr:gt(0)");
var status = {};
rows.each(function(i,row){
status[$(row).find("td:eq(1)").text()] =
parseInt($(row).find("td:eq(2)").text().match(/\d+/).toString());
});
return status;
};
function generateCode(status){
var code = "";
code += "exports.httpStatusCode = " + JSON.stringify(status) + ";";
return code;
};
function writeFile(code){
fs.writeFile(output, code, function(err) {
if(err) {
console.log(err);
} else {
console.log("The file was saved " + output + "!");
}
});
};
function handler(html){
var status = getHttpStatusCode(html);
var code = generateCode(status);
writeFile(code);
};
});
})();
代码寄宿在github：
最终生成类为：
exports.httpStatusCode = {
"Continue": 100, "SwitchingProtocols": 101, "OK": 200, "Created": 201, "Accepted": 202, "NonAuthoritativeInformation": 203, "NoContent": 204, "ResetContent": 205, "PartialContent": 206, "MultipleChoices": 300, "Ambiguous": 300, "MovedPermanently": 301, "Moved": 301, "Found": 302, "Redirect": 302, "SeeOther": 303, "RedirectMethod": 303, "NotModified": 304, "UseProxy": 305, "Unused": 306, "TemporaryRedirect": 307, "RedirectKeepVerb": 307, "BadRequest": 400, "Unauthorized": 401, "PaymentRequired": 402, "Forbidden": 403, "NotFound": 404, "MethodNotAllowed": 405, "NotAcceptable": 406, "ProxyAuthenticationRequired": 407, "RequestTimeout": 408, "Conflict": 409, "Gone": 410, "LengthRequired": 411, "PreconditionFailed": 412, "RequestEntityTooLarge": 413, "RequestUriTooLong": 414, "UnsupportedMediaType": 415, "RequestedRangeNotSatisfiable": 416, "ExpectationFailed": 417, "UpgradeRequired": 426, "InternalServerError": 500, "NotImplemented": 501, "BadGateway": 502, "ServiceUnavailable": 503, "GatewayTimeout": 504, "HttpVersionNotSupported": 505 };
最后考虑到或许还有很多像我一样懒散的人，所以共享此代码发布到了npm，只需要npm install httpstatuscode，便可以简单实用，如下是一个测试demo：
var httpStatusCode = require("httpstatuscode").httpStatusCode;
var toBeEqual = function (actual,expected){
if(actual !== expected){
throw (actual + " not equal " + expected);
}
};
toBeEqual(httpStatusCode.OK,200);
toBeEqual(httpStatusCode.Created,201);
toBeEqual(httpStatusCode.BadRequest,400);
toBeEqual(httpStatusCode.InternalServerError,500);
console.log(httpStatusCode);
console.log("success");
懒人的文章总是代码多余文字，我喜欢代码说明一切，感谢各位能阅读此随笔。
本文转自 破狼 51CTO博客，原文链接：http://blog.51cto.com/whitewolfblog/1174284，如需转载请自行联系原作者