文章標題 nginx 實現express 高併發介面
阿新 • • 發佈:2019-01-25
之前用ssh寫過一個後端服務介面,通過一個api向外部提供天氣預報資料,但是併發量一旦大了,反應時長就會變的很長,也容易爆記憶體不足的問題。後來瞭解到node.js 處理高併發的優勢,就拿java+tomcat 和node.js 做了實驗對比。
整體框架結構為,前端nginx 做反向代理,轉向兩個http server,httpserver 從快取中去讀取資料,並立馬返回,服務端指令碼定時去更新快取中的資料,為確保每一個客戶端訪問的資料的一致性,nginx配置如下。
nginx.conf
#user nobody;
worker_processes 1;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
#access_log logs/access.log main;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
upstream weather.deyuan.com {
ip_hash ;
server 192.168.6.120:3000;
server 192.168.6.80:3000;
}
server {
listen 83;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
proxy_pass http://weather.deyuan.com;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias;
# location / {
# root html;
# index index.html index.htm;
# }
#}
# HTTPS server
#
#server {
# listen 443 ssl;
# server_name localhost;
# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;
# ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 5m;
# ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on;
# location / {
# root html;
# index index.html index.htm;
# }
#}
}
express 路由配置:
var express = require('express');
var redis = require('redis');
var util=require("util")
var client = redis.createClient(6379,'127.0.0.1');
var router = express.Router();
/**
* 本級目錄對應上一級目錄為WeatherApi
* 為天氣預報相關介面
*/
/* 天氣預報資料介面 引數cityName 為城市名稱 */
router.get('/getData', function(req, res, next) {
cityName = req.query.cityName;
client.get(cityName, function (err, reply) {
res.send(reply);
});
})
/* 天氣預報Token介面 */
router.get('/getToken', function (req, res,next) {
var str=util.format('%s=%s&%s=%s', 'host_lbs', 'v.juhe.cn', 'key_lbs','9c6b8aaa4a399952faad5765313849de');
res.send(str);
})
module.exports = router;