餐饮点餐小程序源码|点餐小程序源代码

　　餐饮点餐小程序是一个使用 PHP/MySQL 的简单项目。该项目是使用 HTML、CSS、PHP、JavaScript (jQuery/Ajax) 和 Bootstrap 开发的。使用 PHP 和 MySQL的餐饮点餐小程序具有管理端和访问者/客户端。管理员将管理网站所需的所有数据和可用菜单列表。客户将浏览网站，探索并选择他/她想要的菜单并将其从购物车中保存以供以后结帐。之后，客户将进入购物车，查看他/她的订单，确认收货地址等信息，然后下订单。这是一个易于使用的项目。

　　项目名称：餐饮点餐小程序

　　演示：c.ymzan.top

　　语言：PHP

　　使用的数据库：MySQL

　　使用的设计：HTML JavaScript、Ajax、JQuery、Bootstrap

　　使用的浏览器： IE8、谷歌浏览器、Opera Mozilla

　　使用的软件：WAMP/ XAMPP/ LAMP/MAMP

　　最重要的是，要运行这个项目，您必须在您的 PC 上安装一个虚拟服务器，即XAMPP 。在 XAMPP 中启动 Apache 和 MySQL 之后按照以下步骤操作：

　　第一步：首先，提取文件

　　第二步：之后，复制主项目文件夹

　　第三步：所以，你需要粘贴到 xampp/htdocs/

　　此外，现在连接数据库

　　第 4 步：所以，现在，打开浏览器并转到 URL “http://localhost/phpmyadmin/”

　　第 5 步：之后，单击数据库选项卡

　　第 6 步：创建一个名为“fos_db”的数据库，然后单击导入选项卡

　　第七步：当然，单击浏览文件并选择“ fos_db. sql ”文件，位于“db”文件夹中

　　第八步：同时，点击 Go 按钮。

　　创建数据库后，

　　第九步：此外，打开浏览器并转到 URL “http://localhost/fos”

　　package.json

middleware.js   
// ======= GoReplay Middleware helper =============  
// Created by Leonid Bugaev in 2017  
//  
// For questions use GitHub or support@goreplay.org  
//  
// GoReplay: https://github.com/buger/goreplay  
// Middleware package: https://github.com/buger/goreplay/middleware  

var middleware;  

function init() {  
    var proxy = {  
        ch: {},  
        on: function(chan, id, cb) {  
            if (!cb && id) {  
                cb = id;  
            } else if (cb && id) {  
                chan = chan + "#" + id;  
            }  

            if (!proxy.ch[chan]) {  
                proxy.ch[chan] = [];  
            }  

            proxy.ch[chan].push({  
                created: new Date(),  
                cb: cb  
            });  

            return proxy;  
        },  

        emit: function(msg, raw) {  
            var chanPrefix;  

            switch(msg.type) {  
                case "1": chanPrefix = "request"; break;  
                case "2": chanPrefix = "response"; break;  
                case "3": chanPrefix = "replay"; break;  
            }  

            let resp = msg;  

            ["message", chanPrefix, chanPrefix + "#" + msg.ID].forEach(function(chanID, idx){  
                if (proxy.ch[chanID]) {  
                    proxy.ch[chanID].forEach(function(ch){  
                        let r = ch.cb(msg);  
                        if (resp) resp = r; // If one of callback decided not to send response back, do not override it in global callbacks  
                    })  

                    // Cleanup Individual message channels to avoid memory leaks  
                    if (idx == 2) {  
                        delete proxy.ch[chanID]  
                    }  
                }  
            })  

            if (resp) {  
              process.stdout.write(`${resp.rawMeta.toString('hex')}${Buffer.from("\n").toString("hex")}${resp.http.toString('hex')}\n`)  
            }  

            return resp  
        }  
    }  

    // Clean up old messaged ID specific channels if they are older then 60s  
    let gc = function(gcTime){  
        let now = new Date();  
        for (k in proxy.ch) {  
            if (k.indexOf("#") == -1) continue;  

            proxy.ch[k] = proxy.ch[k].filter(function(ch){  
                return (now - ch.created) < gcTime  
            })  

            if (proxy.ch[k].length == 0) {  
                delete proxy.ch[k]  
            }  
        }  
    }  
    proxy.gc = gc  

    setInterval(function(){  
        gc(10 * 1000)  
    }, 1000);  

    const readline = require('readline');  
    const rl = readline.createInterface({  
          input: process.stdin  
    });  

    rl.on('line', function(line) {  
        let msg = parseMessage(line)  
        if (msg) {  
            proxy.emit(msg, line)  
        }  
    });  

    middleware = proxy;  

    return proxy;  
}  

function parseMessage(msg) {  
    try {  
        let payload = Buffer.from(msg, "hex");  
        let metaPos = payload.indexOf("\n");  
        let meta = payload.slice(0, metaPos);  
        let metaArr = meta.toString("ascii").split(" ");  
        let pType = metaArr[0];  
        let pID = metaArr[1];  
        let raw = payload.slice(metaPos + 1, payload.length);  

        return {  
            type: pType,  
            ID: pID,  
            rawMeta: meta,  
            meta: metaArr,  
            http: raw  
        }  
    } catch(e) {  
        fail(`Error while parsing incoming request: ${msg}`)  
    }  
}  

// Used to compare values from original and replayed responses  
// Accepts request id, regexp pattern for searching the compared value (should include capture group), and callback which returns both original and replayed matched value.  
// Example:   
//  
//   // Compare HTTP headers for response and replayed response, and map values  
//   let tokMap = {};  
//  
//   gor.on("request", function(req) {  
//     let tok = gor.httpHeader(req.http, "Auth-Token");  
//     if (tok && tokMap[tok]) {  
//       req.http = gor.setHttpHeader(req.http, "Auth-Token", tokMap[tok])   
//     }  
//  
//     gor.searchResponses(req.ID, "X-Set-Token: (\w+)$", function(respTok, replTok) {  
//       tokMap[respTok] = replTok;  
//     })  
//  
//     return req;  
//   })  
//  
function searchResponses(id, searchPattern, callback) {  
    let re = new RegExp(searchPattern);  

    // Using regexp require converting buffer to string  
    // Before converting to string we can use initial `Buffer.indexOf` check  
    let indexPattern = searchPattern.split("(")[0];  

    if (!indexPattern) {  
        console.error("Search regexp should include capture group, pointing to the value: `prefix-(.*)`")  
        return  
    }  

    middleware.on("response", id, function(resp){  
        if (resp.http.indexOf(indexPattern) == -1) {  
            callback()  
            return resp  
        }  

        let respMatch = resp.http.toString('utf-8').match(re);  
        if (!respMatch) {  
            callback()  
            return resp  
        }  

        middleware.on("replay", id, function(repl) {  
            if (repl.http.indexOf(indexPattern) == -1) {  
                callback(respMatch[1]);  
                return repl;  
            }  

            let replMatch = repl.http.toString('utf-8').match(re);  

            if (!replMatch) {  
                callback(respMatch[1]);  
                return repl;  
            }  

            callback(respMatch[1], replMatch[1]);  

            return repl;  
        })  

        return resp;  
    })  
}  

// =========== HTTP parsing =================  

// Example HTTP payload record (including hidden characters):  
//  
//  POST / HTTP/1.1\r\n  
//  User-Agent: Node\r\n  
//  Content-Length: 5\r\n  
//  \r\n  
//  hello  

function httpMethod(payload) {  
    var pEnd = payload.indexOf(' ');  
    return payload.slice(0, pEnd).toString("ascii");  
}  

function httpPath(payload) {  
    var pStart = payload.indexOf(' ') + 1;  
    var pEnd = payload.indexOf(' ', pStart);  
    return payload.slice(pStart, pEnd).toString("ascii");  
}  

function setHttpPath(payload, newPath) {  
    var pStart = payload.indexOf(' ') + 1;  
    var pEnd = payload.indexOf(' ', pStart);  

    return Buffer.concat([payload.slice(0, pStart), Buffer.from(newPath), payload.slice(pEnd, payload.length)])  
}  

function httpPathParam(payload, name) {  
    let path = httpPath(payload);  
    let re = new RegExp(name + "=([^&$]+)");  
    let match = path.match(re);  

    if (match) return decodeURI(match[1]);  
}  

function setHttpPathParam(payload, name, value) {  
    let path = httpPath(payload);  
    let re = new RegExp(name + "=([^&$]+)");  
    let newPath = path.replace(re, name + "=" + encodeURI(value));  

    // If we should add new param instead  
    if (newPath == path) {  
        if (newPath.indexOf("?") == -1) {  
            newPath += "?"  
        } else {  
            newPath += "&"  
        }  

        newPath += name + "=" + encodeURI(value);  
    }  

    return setHttpPath(payload, newPath)  
}  

// HTTP response have status code in same position as `path` for requests  
function httpStatus(payload) {  
    return httpPath(payload);  
}  

function setHttpStatus(payload, newStatus) {  
    return setHttpPath(payload, newStatus);  
}  

function httpHeaders(payload) {  
    var httpHeaderString = payload.slice(0,payload.indexOf("\r\n\r\n") + 4).toString().split("\n").slice(1);  
    var headers = {};  

    for (var item in httpHeaderString) {  
        var parts = httpHeaderString[item].split(":");  

        if (parts.length > 1) {  
            headers[parts[0]] = parts.slice(1).join(":").trim();      
        }  
    }  

    return headers;  
}  

function httpHeader(payload, name) {  
    var currentLine = 0;  
    var i = 0;  
    var header = { start: -1, end: -1, valueStart: -1 }  
    var nameBuf = Buffer.from(name);  
    var nameBufLower = Buffer.from(name.toLowerCase());  

    while(c = payload[i]) {  
        if (c == 13) { // new line "\n"  
            currentLine++;  
            i++  
            header.end = i  

            if (currentLine > 0 && header.start > 0 && header.valueStart > 0) {  
                if (nameBuf.compare(payload, header.start, header.valueStart - 1) == 0 ||  
                    nameBufLower.compare(payload, header.start, header.valueStart - 1) == 0) { // ensure that headers are not case sensitive  
                    header.value = payload.slice(header.valueStart, header.end - 1).toString("utf-8").trim();  
                    header.name = payload.slice(header.start, header.valueStart - 1).toString("utf-8");  
                    return header  
                }  
            }  

            header.start = -1  
            header.valueStart = -1  
            continue;  
        } else if (c == 10) { // "\r"  
            i++  
            continue;  
        } else if (c == 58) { // ":" Header/value separator symbol  
            if (header.valueStart == -1) {  
                header.valueStart = i + 1;  
                i++  
                continue;  
            }  
        }  

        if (header.start == -1) header.start = i;  

        i++  
    }  

    return  
}  

function setHttpHeader(payload, name, value) {  
    let header = httpHeader(payload, name);  
    if (!header) {  
        let headerStart = payload.indexOf(13) + 1;  
        return Buffer.concat([payload.slice(0, headerStart + 1), Buffer.from(name + ": " + value + "\r\n"), payload.slice(headerStart + 1, payload.length)])  
    } else {  
        return Buffer.concat([payload.slice(0, header.valueStart), Buffer.from(" " + value + "\r\n"), payload.slice(header.end + 1, payload.length)])  
    }  
}  

function deleteHttpHeader(payload, name) {  
    let header = httpHeader(payload, name);  

    if (header) {  
        return Buffer.concat([payload.slice(0, header.start), payload.slice(header.end+1, payload.length)])  
    }  

    return payload  
}  

function httpBody(payload) {  
    let bodyIndex = payload.indexOf("\r\n\r\n");  
    if (-1 != bodyIndex){  
        return payload.slice(bodyIndex + 4, payload.length);     
    } else {  
        return null;  
    }  
}  

function setHttpBody(payload, newBody) {  
    let p = setHttpHeader(payload, "Content-Length", newBody.length)  
    let headerEnd = p.indexOf("\r\n\r\n") + 4;  
    return Buffer.concat([p.slice(0, headerEnd), newBody])  
}  

function httpBodyParam(payload, name) {  
    let body = httpBody(payload);  
    let re = new RegExp(name + "=([^&$]+)");  
    if (body.indexOf(name + "=") != -1) {  
        let param = body.toString('utf-8').match(re);  
        if (param) {  
            return decodeURI(param[1]);  
        }  
    }  
}  

function setHttpBodyParam(payload, name, value) {  
    let body = httpBody(payload);  
    let re = new RegExp(name + "=([^&$]+)");  

    let newBody = body.toString('utf-8');  

    if (newBody.indexOf(name + "=") != -1 ) {  
        newBody = newBody.replace(re, name + "=" + encodeURI(value));  
    } else {  
        if (newBody.indexOf("=") != -1) {  
            newBody += "&";  
        }  
        newBody += name + "=" + value;  
    }  

    return setHttpBody(payload, Buffer.from(newBody));  
}  

function setHttpCookie(payload, name, value) {  
    let h = httpHeader(payload, "Cookie");  
    let cookie = h ? h.value : "";  
    let cookies = cookie.split("; ").filter(function(v){ return v.indexOf(name + "=") != 0 })  
    cookies.push(name + "=" + value)  
    return setHttpHeader(payload, "Cookie", cookies.join("; "))  
}  

function deleteHttpCookie(payload, name) {  
    let h = httpHeader(payload, "Cookie");  
    let cookie = h ? h.value : "";  
    let cookies = cookie.split("; ").filter(function(v){ return v.indexOf(name + "=") != 0 })  
    return setHttpHeader(payload, "Cookie", cookies.join("; "))  
}  

function httpCookie(payload, name) {  
    let h = httpHeader(payload, "Cookie");  
    let cookie = h ? h.value : "";  
    let value;  
    let cookies = cookie.split("; ").forEach(function(v){  
        if (v.indexOf(name + "=") == 0) {  
            value = v.substr(name.length + 1);  
        }  
    })  
    return value;  
}  

module.exports = {  
    init: init,  
    on: function(){ return middleware.on.apply(this, arguments) },  
    parseMessage: parseMessage,  
    searchResponses: searchResponses,  
    httpPath: httpPath,  
    httpMethod: httpMethod,  
    setHttpPath: setHttpPath,  
    httpPathParam: httpPathParam,  
    setHttpPathParam: setHttpPathParam,  
    httpStatus: httpStatus,  
    setHttpStatus: setHttpStatus,  
    httpHeader: httpHeader,  
    setHttpHeader: setHttpHeader,  
    deleteHttpHeader: deleteHttpHeader,  
    httpBody: httpBody,  
    setHttpBody: setHttpBody,  
    httpBodyParam: httpBodyParam,  
    setHttpBodyParam: setHttpBodyParam,  
    httpCookie: httpCookie,  
    setHttpCookie: setHttpCookie,  
    deleteHttpCookie: deleteHttpCookie,  
    test: testRunner,  
    benchmark: testBenchmark,  
    httpHeaders: httpHeaders  
}  

// =========== Tests ==============  

function testRunner(){  
    ["init", "filter", "parseMessage", "httpMethod", "httpPath", "setHttpHeader", "deleteHttpHeader", "httpPathParam", "httpHeader", "httpBody", "setHttpBody", "httpBodyParam", "httpCookie", "setHttpCookie", "deleteHttpCookie", "httpHeaders"].forEach(function(t){  
        console.log(`====== Start ${t} =======`)  
        eval(`TEST_${t}()`)  
        console.log(`====== End ${t} =======`)  
    })  
}  

function testBenchmark(){  
    const child_process = require('child_process');  

    let gor = init();  
    gor.on("message", function(){  
    });  

    gor.on("request", function(){  
    });  

    for (var i = 0; i<256; i++) {  
        let req = parseMessage(Buffer.from("1 2 3\nGET / HTTP/1.1\r\n\r\n").toString('hex'));  
        req.ID = +Date.now()  
        gor.emit(req);  

        gor.on("request", req.ID+"", function(){  
            gor.on("response", req.ID+"", function(){  
            })  
        })  

        if ( i % 3 == 0 ) {  
            let resp = parseMessage(Buffer.from("2 2 3\nHTTP/1.1 200 OK\r\n\r\n").toString('hex'));  
            resp.ID = req.ID  
            gor.emit(resp);  
        }  
    }  

    child_process.execSync("sleep 0.01");  

    gor.gc(1)   

    fail(JSON.stringify(gor.ch))  
}  

// Just print in red color  
function fail(message) {  
    console.error("\x1b[31m[MIDDLEWARE] %s\x1b[0m", message)  
}  

function log(message) {  
    console.error(message)  
}  

function TEST_init() {  
    const child_process = require('child_process');  

    let received = 0;  
    let gor = init();  
    gor.on("message", function(){  
        received++; // should be called 3 times for for every request  
    });  

    gor.on("request", function(){  
        received++; // should be called 1 time only for request  
    });  

    gor.on("response", "2", function(){  
        received++; // should be called 1 time only for specific response  
    })  

    if (Object.keys(gor.ch).length != 3) {  
        return fail("Should create 3 channels");  
    }  

    let req = parseMessage(Buffer.from("1 2 3\nGET / HTTP/1.1\r\n\r\n").toString('hex'));  
    let resp = parseMessage(Buffer.from("2 2 3\nHTTP/1.1 200 OK\r\n\r\n").toString('hex'));  
    let resp2 = parseMessage(Buffer.from("2 3 3\nHTTP/1.1 200 OK\r\n\r\n").toString('hex'));  

    gor.emit(req);  
    gor.emit(resp);  
    gor.emit(resp2);  

    child_process.execSync("sleep 0.01");  

    if (received != 5) {  
        fail(`Should receive 5 messages: ${received}`);  
    }  
}  

function TEST_filter() {  
    const child_process = require('child_process');  

    let gor = init();  
    gor.on("request", function(req){  
        if (httpPath(req.http) != "/filter") {  
            return req  
        }  
    });  

    gor.on("request", function(req){  
        return req  
    });  

    let reqPass = parseMessage(Buffer.from("1 2 3\nGET / HTTP/1.1\r\n\r\n").toString('hex'));  
    let reqFilter = parseMessage(Buffer.from("1 2 3\nGET /filter HTTP/1.1\r\n\r\n").toString('hex'));  

    if (!gor.emit(reqPass)) {  
        return fail("Should not filter request")  
    }  

    if (gor.emit(reqFilter)) {  
        return fail("Should filter request even if one middleware rejected it")  
    }  

}  

function TEST_parseMessage() {  
    const exampleMessage = Buffer.from("1 2 3\nGET / HTTP/1.1\r\n\r\n").toString('hex')  
    let msg = parseMessage(exampleMessage)  
    let expected = { type: '1', ID: '2', meta: ["1", "2", "3"], http: Buffer.from("GET / HTTP/1.1\r\n\r\n") }  

    Object.keys(expected).forEach(function(k){  
        if (msg[k].toString() != expected[k].toString()) {  
            fail(`${k}: '${expected[k]}' != '${msg[k]}'`)  
        }  
    })  
}  

function TEST_httpPath() {  
    const examplePayload = "GET /test HTTP/1.1\r\n\r\n";  

    let payload = Buffer.from(examplePayload);  
    let path = httpPath(payload);  

    if (path != "/test") {  
        return fail(`Path '${patj}' != '/test'`)  
    }  

    let newPayload = setHttpPath(payload, '/')  
    if (newPayload.toString() != "GET / HTTP/1.1\r\n\r\n") {  
        return fail(`Malformed payload '${newPayload}'`)  
    }  

    newPayload = setHttpPath(payload, '/bigger')  
    if (newPayload.toString() != "GET /bigger HTTP/1.1\r\n\r\n") {  
        return fail(`Malformed payload '${newPayload}'`)  
    }  
}  

function TEST_httpMethod() {  
    const examplePayload = "GET /test HTTP/1.1\r\n\r\n";  

    let payload = Buffer.from(examplePayload);  
    let method = httpMethod(payload);  

    if (method != "GET") {  
        return fail(`Path '${method}' != 'GET'`)  
    }  
}  

function TEST_httpPathParam() {  
    let p = Buffer.from("GET / HTTP/1.1\r\n\r\n");  

    if (httpPathParam(p, "test")) {  
        return fail("Should not found param")  
    }  

    p = setHttpPathParam(p, "test", "123");  
    if (httpPath(p) != "/?test=123") {  
        return fail("Should set first param: " + httpPath(p));  
    }  

    if (httpPathParam(p, "test") != "123") {  
        return fail("Should get first param: " + httpPathParam(p, "test"));  
    }  

    p = setHttpPathParam(p, "qwer", "ty");  
    if (httpPath(p) != "/?test=123&qwer=ty") {  
        return fail("Should set second param: " + httpPath(p));  
    }  

    p = setHttpPathParam(p, "test", "4321");  
    if (httpPath(p) != "/?test=4321&qwer=ty") {  
        return fail("Should update first param: " + httpPath(p));  
    }  

    if (httpPathParam(p, "test") != "4321") {  
        return fail("Should update first param: " + httpPath(p));  
    }  
}  

function TEST_httpBodyParam() {  
    let p = Buffer.from("POST / HTTP/1.1\r\n\r\n");  

    if (httpBodyParam(p, "test")) {  
        return fail("Should not found param")  
    }  

    p = setHttpBodyParam(p, "test", "123");  
    if (httpBody(p).toString() != "test=123") {  
        return fail("Should set first param: " + httpBody(p).toString());  
    }  

    if (httpBodyParam(p, "test") != "123") {  
        return fail("Should get first param: " + httpBodyParam(p, "test"));  
    }  

    p = setHttpBodyParam(p, "qwer", "ty");  
    if (httpBody(p).toString() != "test=123&qwer=ty") {  
        return fail("Should set second param: " + httpBody(p).toString());  
    }  

    p = setHttpBodyParam(p, "test", "4321");  
    if (httpBody(p).toString() != "test=4321&qwer=ty") {  
        return fail("Should update first param: " + httpBody(p).toString());  
    }  

    if (httpBodyParam(p, "test") != "4321") {  
        return fail("Should update first param: " + httpBody(p).toString());  
    }  
}  

function TEST_httpHeader() {  
    const examplePayload = "GET / HTTP/1.1\r\nHost: localhost:3000\r\nUser-Agent: Node\r\nContent-Length:5\r\n\r\nhello";  

    let expected = {"Host": "localhost:3000", "User-Agent": "Node", "Content-Length": "5"}  

    Object.keys(expected).forEach(function(name){  
        let payload = Buffer.from(examplePayload);  
        let header = httpHeader(payload, name);  
        if (!header) {  
            fail(`Header not found. Was looking for: ${name}`)  
        }  
        if (header && header.value != expected[name]) {  
            fail(`${name}: '${expected[name]}' != '${header.value}'`)  
        }  
    })  
}  

function TEST_setHttpHeader() {  
    const examplePayload = "GET / HTTP/1.1\r\nUser-Agent: Node\r\nContent-Length: 5\r\n\r\nhello";  

    // Modify existing header  
    ["", "1", "Long test header"].forEach(function(ua){  
        let expected = `GET / HTTP/1.1\r\nUser-Agent: ${ua}\r\nContent-Length: 5\r\n\r\nhello`;  
        let p = Buffer.from(examplePayload);  
        p = setHttpHeader(p, "User-Agent", ua);  
        if (p != expected) {  
            console.error(`setHeader failed, expected User-Agent value: ${ua}.\n${p}`)  
        }  
    })  

    // Adding new header  
    let expected = `GET / HTTP/1.1\r\nX-Test: test\r\nUser-Agent: Node\r\nContent-Length: 5\r\n\r\nhello`;  
    let p = Buffer.from(examplePayload);  
    p = setHttpHeader(p, "X-Test", "test");  
    if (p != expected) {  
        console.error(`setHeader failed, expected new header 'X-Test' header: ${p}`)  
    }  
}  

function TEST_deleteHttpHeader() {  
    const examplePayload = "GET / HTTP/1.1\r\nUser-Agent: Node\r\nContent-Length: 5\r\n\r\nhello";  

    // Adding new header  
    let expected = `GET / HTTP/1.1\r\nContent-Length: 5\r\n\r\nhello`;  
    let p = Buffer.from(examplePayload);  
    p = deleteHttpHeader(p, "User-Agent", "test");  
    if (p != expected) {  
        console.error(`setHeader failed, expected delete header 'User-Agent' header: ${p}`)  
    }  
}  

function TEST_httpBody() {  
    const examplePayload = "GET / HTTP/1.1\r\nUser-Agent: Node\r\nContent-Length: 5\r\n\r\nhello";  
    let body = httpBody(Buffer.from(examplePayload));  
    if (body != "hello") {  
        fail(`'${body}' != 'hello'`)  
    }  

    const exampleInvalidPayload = "Invalid HTTP Response by Network issue";  
    let invalidBody = httpBody(Buffer.from(exampleInvalidPayload));  
    if (invalidBody != null) {  
        fail(`'${invalidBody}' != 'null'`)  
    }  
}  

function TEST_setHttpBody() {  
    const examplePayload = "GET / HTTP/1.1\r\nUser-Agent: Node\r\nContent-Length: 5\r\n\r\nhello";  
    let p = setHttpBody(Buffer.from(examplePayload), Buffer.from("hello, world!"));  

    if (p != "GET / HTTP/1.1\r\nUser-Agent: Node\r\nContent-Length: 13\r\n\r\nhello, world!") {  
        fail(`Wrong body: '${p}'`)  
    }  
}  

function TEST_httpCookie() {  
    const examplePayload = "GET / HTTP/1.1\r\nCookie: a=b; test=zxc\r\n\r\n";  
    let c = httpCookie(Buffer.from(examplePayload), "test");  
    if (c != "zxc") {  
        return fail(`Should get cookie: ${c}`);  
    }  

    c = httpCookie(Buffer.from(examplePayload), "nope");  
    if (c != null) {  
        return fail(`Should not find cookie: ${c}`);  
    }  
}  

function TEST_setHttpCookie() {  
    const examplePayload = "GET / HTTP/1.1\r\nCookie: a=b; test=zxc\r\n\r\n";  
    let p = setHttpCookie(Buffer.from(examplePayload), "test", "1");  
    if (p != "GET / HTTP/1.1\r\nCookie: a=b; test=1\r\n\r\n") {  
        return fail(`Should update cookie: ${p}`)  
    }  

    p = setHttpCookie(Buffer.from(examplePayload), "new", "one");  
    if (p != "GET / HTTP/1.1\r\nCookie: a=b; test=zxc; new=one\r\n\r\n") {  
        return fail(`Should add new cookie: ${p}`)  
    }  
}  

function TEST_deleteHttpCookie() {  
    const examplePayload = "GET / HTTP/1.1\r\nCookie: a=b; test=zxc\r\n\r\n";  
    let p = deleteHttpCookie(Buffer.from(examplePayload), "a");  
    if (p != "GET / HTTP/1.1\r\nCookie: test=zxc\r\n\r\n") {  
        return fail(`Should delete cookie: ${p}`)  
    }  
}  

function TEST_httpHeaders() {  
    const examplePayload = "GET / HTTP/1.1\r\nHost: localhost:3000\r\nUser-Agent: Node\r\nContent-Length:5\r\n\r\nhello";  

    let expectedHeaders = {"Host": "localhost:3000", "User-Agent": "Node", "Content-Length": "5"}  
    let payload = Buffer.from(examplePayload);  
    let headers = httpHeaders(payload);  

    ["Host", "User-Agent", "Content-Length"].forEach(function(header){  
        let actual = headers[header];  
        let expected = expectedHeaders[header];  

        if (!actual) {  
            fail(`${header} Header was not found`);  
        }  

        if (actual != expected) {  
            fail(`${header} Header not Equal to Expected: ${expected} was ${actual}`);  
        }  

    })  
}  

　
　　餐饮点餐小程序的特点

　　管理员端

　　登录页面

　　管理员将输入其凭据以访问系统管理员端的页面。

　　类别页面

　　列出所有产品/菜单类别并由管理员管理的页面。

　　菜单页

　　列出产品/菜单并可由管理员管理的页面。

　　系统设置

　　管理员配置网站数据的页面。

　　客户端

　　主页

　　默认情况下将重定向客户端的页面，并且可以选择他/她想要的菜单。

　　购物车页面

　　列出正在保存购物车的菜单/产品列表的页面。

　　关于页面

　　显示咖啡厅或餐厅内容的页面。

　　结帐页面

　　客户下订单的页面。