nginx在反向代理HTTP协议的时候，默认使用的是HTTP1.0去向后端服务器获取响应的内容后在返回给客户端。
HTTP1.0和HTTP1.1的一个不同之处就是，HTTP1.0不支持HTTP keep-alive。nginx在后端服务器请求时使用了HTTP1.0同时使用HTTP Header的Connection：Close通知后端服务器主动关闭连接。这样会导致任何一个客户端的请求都在后端服务器上产生了一个TIME-WAIT状态的连接。所以我们需要在Nginx上启用HTTP1.1的向后端发送请求，同时支持Keep-alive。

配置方法

我们增加三个参数keepalive 50，proxy_http_version 1.1 , proxy_set_header Connection 来配置。
upstream http_backend {

server 127.0.0.1:8080;
keepalive 50;

}
server {

...
location /http/ {
    proxy_pass http://http_backend;
    proxy_http_version 1.1;
    proxy_set_header Connection "";
    ...
}

}

今天开始，微信支付摇免单正式上线。在“微信支付商家消费券”小程序领券并消费后，就可以获得，最高可获得 200 元的摇免单机会。

注意摇免单分三步：1、领券 2、消费 3、摇一摇，必须消费后才能摇一摇。

获得免单奖励就意味着这笔已支付款项，将立即返还至你的微信支付“零钱”账户。一次没摇到也没关系，除了免单大奖还有机会获得到店红包，每天 3 次机会。

值得一提的是，这一次，用券消费做贡献全国都可以有了；还可以找到喜欢的品牌线上下单，即使不出街，不耽误消费。

微信支付摇一摇免单正式上线：每天 3 次最高 200 元

昨天，微信联合中国信通院发布了《2019-2020 微信就业影响力报告》，据微信“码上经济课题组”测算，2019 年，微信生态带来的码上经济规模达到 8.58 万亿元，约占我国 GDP（99.0865 万亿元）的9%。

五一小长假期间，微信支付线下消费总额较 3 月环比增长 30%，目前已恢复并超过去年 12 月的消费水平。微信电子消费券也在全国开花，假期 3 天带动消费 9 亿元，40 岁以上的人群贡献过半消费力。

5月15日消息 小米似乎正准备推出一款新的安卓电视棒——小米TV Stick，该产品已经现身国外零售商Gearbest网站。

外观方面，小米电视棒就像一个U盘，外形紧凑，提供标准 HDMI 2.0 和 USB Type-C 接口，前者用于音画传输，后者用于供电。

配置方面，小米电视棒似乎跟小米Box S电视盒子有着相同的性能，这意味着它配备了 Amlogic S905（这次是 Y2 版本）四核处理器，Mali-G31 GPU，2GB RAM 和 8GB 存储空间。另外，它还将支持 4K HDR，支持杜比和 DTS HD 双解码。

但上述配置的真实性还有待证实，因为列表中提到HDMI 2.0的部分也将该设备称为“ Mi Box S”，这意味着该配置可能只是先前设备的复制和粘贴，用来占位。

小米电视棒的价格显示为 79.99 美元（约合 568 元），当然这也可能是占位，预计这款产品将会专供海外市场.

May 15th News The US Department of Commerce announced that it will extend Huawei's temporary license for another 90 days and postpone until August 13, 2020.

Since May 2019, the U.S. Department of Commerce has included Huawei on the list of entities for national security reasons. However, the department has subsequently extended the temporary licensing restrictions several times. Prior to this, the US Department of Commerce had extended it to May 15, 2020.

It has previously been reported that the US Department of Commerce ’s Bureau of Industry and Security has extended Huawei ’s temporary General Permit four times, which authorizes certain limited transactions in transactions involving export, re-export and transfer. According to the provisions of the "Export Management Regulations", Huawei and its non-U.S. Branches are provided with items subject to the entity list.

On May 14, a reporter from CCTV interviewed Ran Chengqi, director of China Satellite Navigation System Management Office. Ran Chengqi said that China plans to launch the last Beidou satellite next month, which is also the "end star" of China's Beidou-3 system. The last satellite of the Beidou-3 system to be launched is a geostationary satellite. Prior to this, China's Beidou system has provided services to the world.

Ran Chengqi, Director of the China Satellite Navigation System Management Office: Our Beidou (No. 3 system) has a total of 30 satellites, and now has 29 satellites, and the last satellite. At present, both the satellite and the rocket have entered the launch site, and we are preparing for the pre-launch work, which is expected to be implemented as planned.

Beidou No.3 system is the third step of the construction of Beidou satellite navigation system in China. After completion, it will provide services to the whole world. After the successful launch of the satellite to be launched next month, it will be officially put into operation after a period of on-orbit operation.

Ran Chengqi, Director of the China Satellite Navigation System Management Office: After the launch of this satellite, at an appropriate time this year, we will announce the completion of the global system and provide all of our Beidou services, including basic services such as this, as well as high precision Service, Beidou short message service, etc., we will have a comprehensive service opening, will also bring new highlights to the world satellite navigation.