将参数从jade发送到js / node
我试图将传单/玉的variables传递给js / node文件。 我正在使用node + express + leaflet + js我正在按照以下方法进行操作，但是我没有获取值。 这是我正在使用的代码：
app.js
var express = require('express'); var routes = require('./routes'); var tiles = require('./routes/tiles'); var http = require('http'); var path = require('path'); var app = express(); app.set('port', process.env.PORT || 3000); app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); app.use(express.favicon()); app.use(express.logger('dev')); app.use(express.json()); app.use(express.urlencoded()); app.use(app.router); app.use(express.static(path.join(__dirname, 'public'))); if ('development' == app.get('env')) { app.use(express.errorHandler()); } app.get('/', routes.index); app.get('/tiles', tiles.tiles); http.createServer(app).listen(app.get('port'), function(){ console.log('Express server listening on port ' + app.get('port')); }); index.js //呈现index.jade文件的索引文件
exports.index = function(req, res){ res.render('index'); };
index.jade //玉文件，我发送params的行是“tiles？z = {z}＆x = {x}＆y = {y}”
doctype html html head title Tile Server Example meta(charset='utf-8') meta(name='viewport', content='width=device-width, initial-scale=1.0') link(rel='stylesheet', href='http://cdn.leafletjs.com/leaflet-0.7.1/leaflet.css') body #map(style='width: 800px; height: 800px') a(href='tiles') < tiles > script(src='http://cdn.leafletjs.com/leaflet-0.7.1/leaflet.js') script. var map; var mbTiles = new L.tileLayer('tiles?z={z}&x={x}&y={y}', { tms: true, attribution: 'this is a test', opacity: 0.7 }); map = new L.Map("map",{ zoom: 18, center: [12.83563,77.68312], layers: [mbTiles] });
tiles.js //这里是我得到的参数，我通过控制台显示他们
var x = "", y = "", z = ""; module.exports = function(req, res){ x = req.query.x; y = req.query.y; z = req.query.z; console.log("z="+z+"&x="+x+"&y="+y); var sqlite3 = require('sqlite3').verbose(); var db = new sqlite3.Database('routes/tiles.mbtiles'); var sql = "SELECT * FROM tiles WHERE zoom_level = "+z+" AND tile_column = "+x+" AND tile_row = "+y; db.each(sql, function(err, row) { console.log(sql); res.writeHead(200, {'content-type':'image/jpg'}); res.write(row.tile_data); res.end(); }); db.close(); };
任何想法？
尝试改变，你导出模块的方式。 在tiles.js ：
更改：
exports.tiles = function(req, res){ ...
至：
module.exports = function(req, res){
在app.js ：
app.get('/tiles', tiles.tiles)
至
app.get('/tiles', tiles)
UPDATE
另外，在设置标题和所需信息以将响应改变为完成状态之后，添加res.end() 。
res.writeHead(200, {'content-type':'image/png'}); res.write(row.tile_data); res.end();