使用相同的功能爲各種快車路線

Question

現在我有一個頁面打開並讀取Excel表，並根據我有的index.jade文件做這些數據的東西。我希望能夠爲其他路由器頁面重複使用完全相同的代碼，並且只爲每個頁面更改Excel表格，以便根據不同的Excel表格顯示數據。

因此，我可能只需要將此代碼轉換爲可用於每個router.get函數的函數，而不僅僅是主頁。

router.get('/homepage', function(req, res) { 

var workbook= xlsx.readFile('C:\Users\user\Desktop\homepage.xlsx'); 

    var listStuff = []; 
    results1 = []; 
    results2 = []; 
    results3 = []; 

_.each(workbook.SheetNames, function(value, key, collection) { 

listStuff.push(value); 

var address_of_cell = 'O3' 
var worksheet = workbook.Sheets[value]; 
var desired_cell = worksheet[address_of_cell]; 
var percent_1 = desired_cell.v; 

results1.push(percent_1) 

var address_of_cell = 'P3' 
var worksheet = workbook.Sheets[value]; 
var desired_cell = worksheet[address_of_cell]; 
var percent_2 = desired_cell.v; 

results2.push(percent_2) 

var address_of_cell = 'Q3' 
var worksheet = workbook.Sheets[value]; 
var desired_cell = worksheet[address_of_cell]; 
var percent_3 = desired_cell.v; 

results3.push(percent_3) 
}) 

res.render('index', { title: 'Blah Blah', listStuff: listStuff, workbook: workbook, percentofData: results1, percentofData2: results2, percentofData3: results3}); 
}); 

所以我希望有更多的頁面，如上面說的一個使用相同的代碼，其中僅在Excel工作表中的位置將在頁面中改變。我怎樣才能把上面的代碼轉換成可以被重新用於接下來的幾頁？：

router.get('/page2', function(req, res) { 
    var workbook= xlsx.readFile('C:\Users\user\Desktop\page1.xlsx'); 
    res.send('HelloWorld') 
}) 

router.get('/page3', function(req, res) { 
    var workbook= xlsx.readFile('C:\Users\user\Desktop\page2.xlsx'); 
    res.send('HelloWorld') 
}) 

router.get('/page4', function(req, res) { 
    var workbook= xlsx.readFile('C:\Users\user\Desktop\page3.xlsx'); 
    res.send('HelloWorld') 
}) 

等功能.... 所以我需要在Excel工作簿變量從homepage.xlsx改變page1.xlsx，page2.xlsx，page3.xlsx等。我希望這一切都在同一個index.js文件中完成。

Answer 1

怎麼樣，如果你移動所有重複的邏輯成功能：

function processXLSXFile(filePath) { 
    var workbook= xlsx.readFile(filePath); 

    var listStuff = []; 
    results1 = []; 
    results2 = []; 
    results3 = []; 

_.each(workbook.SheetNames, function(value, key, collection) { 

    listStuff.push(value); 

    var address_of_cell = 'O3' 
    var worksheet = workbook.Sheets[value]; 
    var desired_cell = worksheet[address_of_cell]; 
    var percent_1 = desired_cell.v; 

    results1.push(percent_1) 

    var address_of_cell = 'P3' 
    var worksheet = workbook.Sheets[value]; 
    var desired_cell = worksheet[address_of_cell]; 
    var percent_2 = desired_cell.v; 

    results2.push(percent_2) 

    var address_of_cell = 'Q3' 
    var worksheet = workbook.Sheets[value]; 
    var desired_cell = worksheet[address_of_cell]; 
    var percent_3 = desired_cell.v; 

    results3.push(percent_3) 
    }) 

    return { 
    listStuff: listStuff, 
    results1: results1, 
    results2: results2, 
    results3: results3 
    }; 
} 

的，那麼你可以在你的路由處理程序重用它：

router.get('/homepage', function(req, res) { 
    var result = processXLSXFile('C:\Users\user\Desktop\homepage.xlsx'); 
    var listStuff = result.listStuff; 
    var workbook = result.workbook; 
    var results1 = result.results1; 
    var results2 = result.results2; 
    var results3 = result.results3; 

    res.render('index', { title: 'Blah Blah', listStuff: listStuff, workbook: workbook, percentofData: results1, percentofData2: results2, percentofData3: results3}); 
}); 


router.get('/page2', function(req, res) { 
    var result = processXLSXFile('C:\Users\user\Desktop\page1.xlsx'); 
    var listStuff = result.listStuff; 
    var workbook = result.workbook; 
    var results1 = result.results1; 
    var results2 = result.results2; 
    var results3 = result.results3; 

    res.send('HelloWorld') 
}) 

router.get('/page3', function(req, res) { 
    var result = processXLSXFile('C:\Users\user\Desktop\page2.xlsx'); 
    var listStuff = result.listStuff; 
    var workbook = result.workbook; 
    var results1 = result.results1; 
    var results2 = result.results2; 
    var results3 = result.results3; 

    res.send('HelloWorld') 
}) 

router.get('/page4', function(req, res) { 
    var result = processXLSXFile('C:\Users\user\Desktop\page3.xlsx'); 
    var listStuff = result.listStuff; 
    var workbook = result.workbook; 
    var results1 = result.results1; 
    var results2 = result.results2; 
    var results3 = result.results3; 

    res.send('HelloWorld') 
}) 

希望這幫助你懷疑。

Answer 2

如果你能允許的網址，如「/頁/ 2」，「/頁/ 3」等... 我建議做：

router.get('/page/:id', function(req, res) { 
    // do whatever validation test you need with req.params.id 

    // then 
    var workbook= xlsx.readFile('C:\Users\user\Desktop\page' + req.params.id + '.xlsx'); 
    res.send('HelloWorld') 
})