最近連續(xù)兩個(gè)朋友問我跨域相關(guān)問題,我猜想可能不少朋友也遇到類似問題,我打算寫個(gè)博客聊一下我實(shí)際使用的配置,
先說明一下,我并不太了解這配置,沒精力去了解太多,但我覺得其中有一些關(guān)鍵的小注意點(diǎn),可能有些初學(xué)者不太注意到,導(dǎo)致配置有問題,本文章可能只對(duì)新手有點(diǎn)幫助,如果你有好配置,歡迎評(píng)論回復(fù),讓大家學(xué)習(xí)!
Nginx的CORS配置,網(wǎng)上太多這配置了,但大家更多的復(fù)制粘貼、轉(zhuǎn)發(fā),幾乎都是類似下面這三兩行:
add_header Access-Control-Allow-Origin *;
add_header Access-Control-Allow-Headers X-Requested-With;
add_header Access-Control-Allow-Methods GET,POST,OPTIONS;
這樣有用么?有用,我以前這樣使用也正常過,但后來還是遇到問題了,發(fā)現(xiàn)有些項(xiàng)目請(qǐng)求就不成功,也遇到有些瀏覽器成功,有些瀏覽器不成功;
我也在網(wǎng)上查找各種資料和調(diào)整寫法,最后我調(diào)整好的寫法,基本的使用沒問題,我在項(xiàng)目中也一直使用著!
下面發(fā)一段我實(shí)際項(xiàng)目中的部分配置:
location /aoda-web {
add_header'Access-Control-Allow-Origin'$http_origin;
add_header'Access-Control-Allow-Credentials''true';
add_header'Access-Control-Allow-Methods''GET, POST, OPTIONS';
add_header'Access-Control-Allow-Headers''DNT,web-token,app-token,Authorization,Accept,Origin,Keep-Alive,User-Agent,X-Mx-ReqToken,X- Data-Type,X-Auth-Token,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
add_header'Access-Control-Expose-Headers''Content-Length,Content-Range';
if($request_method='OPTIONS') {
add_header'Access-Control-Max-Age'1728000;
add_header'Content-Type''text/plain; charset=utf-8';
add_header'Content-Length'0;
return204;
}
roothtml;
indexindex.html index.htm;
proxy_passhttp://127.0.0.1:8080;
proxy_set_headerHost$host;
proxy_set_headerX-Real-IP$remote_addr;
proxy_set_headerX-Forwarded-For$proxy_add_x_forwarded_for;
proxy_set_headerX-Forwarded-Proto$scheme;
proxy_connect_timeout5;
}
下面簡(jiǎn)單講解一下,以便大家配置成功!
1、Access-Control-Allow-Origin,這里使用變量 $http_origin取得當(dāng)前來源域,大家說用“*”代表允許所有,我實(shí)際使用并不成功,原因未知;
2、Access-Control-Allow-Credentials,為 true 的時(shí)候指請(qǐng)求時(shí)可帶上Cookie,自己按情況配置吧;
3、Access-Control-Allow-Methods,OPTIONS一定要有的,另外一般也就GET和POST,如果你有其它的也可加進(jìn)去;
4、Access-Control-Allow-Headers,這個(gè)要注意,里面一定要包含自定義的http頭字段(就是說前端請(qǐng)求接口時(shí),如果在http頭里加了自定義的字段,這里配置一定要寫上相應(yīng)的字段),從上面可看到我寫的比較長(zhǎng),我在網(wǎng)上搜索一些常用的寫進(jìn)去了,里面有“web-token”和“app-token”,這個(gè)是我項(xiàng)目里前端請(qǐng)求時(shí)設(shè)置的,所以我在這里要寫上;
5、Access-Control-Expose-Headers,可不設(shè)置,看網(wǎng)上大致意思是默認(rèn)只能獲返回頭的6個(gè)基本字段,要獲取其它額外的,先在這設(shè)置才能獲取它;
6、語句“ if ($request_method = 'OPTIONS') { ”,因?yàn)闉g覽器判斷是否允許跨域時(shí)會(huì)先往后端發(fā)一個(gè) options 請(qǐng)求,然后根據(jù)返回的結(jié)果判斷是否允許跨域請(qǐng)求,所以這里單獨(dú)判斷這個(gè)請(qǐng)求,然后直接返回;
好了,按我上面配置基本都可使用(有些朋友確定只百度復(fù)制了兩行,然后說配置好了,跟前端朋友互扯),
下面發(fā)一個(gè)實(shí)際配置供參考,我做了少量更改,如下:
server{
listen80;
server_namexxx.com;
location/xxx-web/papi {
add_header'Access-Control-Allow-Origin'$http_origin;
add_header'Access-Control-Allow-Credentials''true';
add_header'Access-Control-Allow-Methods''GET, POST, OPTIONS';
add_header'Access-Control-Allow-Headers''DNT,web-token,app-token,Authorization,Accept,Origin,Keep-Alive,User-Agent,X-Mx-ReqToken,X-Data-Type,X-Auth-Token,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
add_header'Access-Control-Expose-Headers''Content-Length,Content-Range';
if($request_method='OPTIONS') {
add_header'Access-Control-Max-Age'1728000;
add_header'Content-Type''text/plain; charset=utf-8';
add_header'Content-Length'0;
return204;
}
roothtml;
indexindex.html index.htm;
proxy_passhttp://127.0.0.1:7071;
proxy_set_headerHost$host;
proxy_set_headerX-Real-IP$remote_addr;
proxy_set_headerX-Forwarded-For$proxy_add_x_forwarded_for;
proxy_set_headerX-Forwarded-Proto$scheme;
proxy_connect_timeout5;
}
location/xxx-web {
add_header'Access-Control-Allow-Origin'$http_origin;
add_header'Access-Control-Allow-Credentials''true';
add_header'Access-Control-Allow-Methods''GET, POST, OPTIONS';
add_header'Access-Control-Allow-Headers''DNT,web-token,app-token,Authorization,Accept,Origin,Keep-Alive,User-Agent,X-Mx-ReqToken,X-Data-Type,X-Auth-Token,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
add_header'Access-Control-Expose-Headers''Content-Length,Content-Range';
if($request_method='OPTIONS') {
add_header'Access-Control-Max-Age'1728000;
add_header'Content-Type''text/plain; charset=utf-8';
add_header'Content-Length'0;
return204;
}
roothtml;
indexindex.html index.htm;
proxy_passhttp://127.0.0.1:8080;
proxy_set_headerHost$host;
proxy_set_headerX-Real-IP$remote_addr;
proxy_set_headerX-Forwarded-For$proxy_add_x_forwarded_for;
proxy_set_headerX-Forwarded-Proto$scheme;
proxy_connect_timeout5;
}
location/ {
root/var/www/xxx/wechat/webroot;
indexindex.html index.htm;
}
error_page500502503504/50x.html;
location= /50x.html {
roothtml;
}
}