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標題: Nginx之CORS（Cross-Origin Resource Sharing，跨來源資源共享）來實現防止盜連多媒體資源 [打印本頁]

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作者: IT_man    時間: 2019-2-20 09:34
標題: Nginx之CORS（Cross-Origin Resource Sharing，跨來源資源共享）來實現防止盜連多媒體資源
以下是gist.github.com支援reverse proxied APIs的範例:

# CORS header support
#
# One way to use this is by placing it into a file called "cors_support"
2 a  [% m3 ?4 G8 t) `# under your Nginx configuration directory and placing the following
( k$ l: p/ _5 n, q# statement inside your **location** block(s):
$ ?" B1 w& u+ W, |  Y$ }: M#
+ i* \9 a% b; b- A5 H#   include cors_support;
( x* o" z! P% _+ `* H" w# |$ |9 E& s#
# As of Nginx 1.7.5, add_header supports an "always" parameter which
' i0 K6 }, I4 H# allows CORS to work if the backend returns 4xx or 5xx status code.
#
# For more information on CORS, please see: http://enable-cors.org/
8 g: `! m9 G4 a- L' p# Forked from this Gist: https://gist.github.com/michiel/1064640
#

9 ?- f. A; e+ c% jset $cors '';
if ($http_origin ~ '^https?://(localhost|www\.yourdomain\.com|www\.yourotherdomain\.com)$') {
        set $cors 'true';
}

2 Z1 S; F5 I  R5 @if ($cors = 'true') {
        add_header 'Access-Control-Allow-Origin' "$http_origin" always;
4 Q2 h+ Z& }- {, |1 @# ?! S( q6 L# E- b% }        add_header 'Access-Control-Allow-Credentials' 'true' always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS' always;
        add_header 'Access-Control-Allow-Headers' 'Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Requested-With' always;
        # required to be able to read Authorization header in frontend
        #add_header 'Access-Control-Expose-Headers' 'Authorization' always;
3 b7 u8 Y3 }  E" I8 [' N, ^}

if ($request_method = 'OPTIONS') {
6 k( G. \! [3 d% u0 F+ `        # Tell client that this pre-flight info is valid for 20 days
, K3 `$ ?$ s) T        add_header 'Access-Control-Max-Age' 1728000;
' j8 g2 |2 N+ a( J2 q. A3 F        add_header 'Content-Type' 'text/plain charset=UTF-8';
' E( `3 ~2 j1 b( y3 N2 z        add_header 'Content-Length' 0;
        return 204;
}

https://gist.github.com/Stanback/7145487#file-nginx-conf 的討論範例:

if ( $request_method !~ ^(GET|POST|HEAD|OPTIONS|PUT|PATCH|DELETE)$ ) {     return 444;
, T2 d/ B) f' V5 W8 Y: Y}
. \6 D/ q! i, @! j: V& N+ F( d7 zset $origin $http_origin;
' d+ A" l4 I& w4 G2 j$ ^if ($origin !~ '^https?://(subdom1|subdom2)\.yourdom\.zone$') {
0 G' K' D) r) F+ s5 Y; b3 Z     set $origin 'https://default.yourdom.zone';
}
if ($request_method = 'OPTIONS') {
# B+ j+ ?9 z) U     add_header 'Access-Control-Allow-Origin' "$origin" always;
     add_header 'Access-Control-Allow-Methods' 'GET, POST, PATCH, PUT, DELETE, OPTIONS' always;
8 d8 c6 T5 r+ a     add_header 'Access-Control-Allow-Headers' 'Content-Type, Accept, Authorization' always;
     add_header 'Access-Control-Allow-Credentials' 'true' always;
     add_header Access-Control-Max-Age 1728000;   #20 days   
9 v6 A% j" }% n. L     add_header Content-Type 'text/plain charset=UTF-8';
0 ~: F. |; S" L' K  x" M: K     add_header Content-Length 0;
9 M5 W: S1 Y  ]- O( k4 M     return 204;
}
if ($request_method ~ '(GET|POST|PATCH|PUT|DELETE)') {
     add_header Access-Control-Allow-Origin "$origin" always;
. A% W  W7 q, q. N" u5 ~8 c. `     add_header Access-Control-Allow-Methods 'GET, POST, PATCH, PUT, DELETE, OPTIONS' always;
# ?; h9 F# I3 W4 p     add_header Access-Control-Allow-Headers 'Content-Type, Accept, Authorization' always;
     add_header Access-Control-Allow-Credentials true always;
}

Access-Control-Allow-Origin Multiple Origin Domains? 的例子:

# based on https://gist.github.com/4165271/
+ V' O8 ^* t2 O#
1 x( q# _7 w% Z  f0 S0 Q# I6 E# Slightly tighter CORS config for nginx
#
# A modification of https://gist.github.com/1064640/ to include a white-list of URLs
#
6 J, p' q2 w9 t/ J9 ?* T# Despite the W3C guidance suggesting that a list of origins can be passed as part of
/ X4 L: V, R( n! u, }) ^$ U# Access-Control-Allow-Origin headers, several browsers (well, at least Firefox)
# don't seem to play nicely with this.
#
' S, w) q+ T9 }/ G, s# To avoid the use of 'Access-Control-Allow-Origin: *', use a simple-ish whitelisting
# method to control access instead.
#
# NB: This relies on the use of the 'Origin' HTTP Header.

location / {

) Y4 d( c/ t7 i0 Y    if ($http_origin ~* (^https?://([^/]+\.)*(domainone|domaintwo)\.com$)) {
) z2 }+ B5 w/ \, _% p! l        set $cors "true";
    }

' F; Y/ G5 R7 c8 g6 X. @1 _    # Nginx doesn't support nested If statements. This is where things get slightly nasty.
    # Determine the HTTP request method used
9 b" I" U6 `5 b: b/ [9 c    if ($request_method = 'OPTIONS') {
        set $cors "${cors}options";
    }
    if ($request_method = 'GET') {
5 G7 E6 i# o; E        set $cors "${cors}get";
    }
/ V2 u( F1 u6 K" [1 G    if ($request_method = 'POST') {
        set $cors "${cors}post";
4 d& x& A1 j  O* S0 L" P& _; s: `    }
0 q* t! r5 r- k
    if ($cors = "true") {
        # Catch all incase there's a request method we're not dealing with properly
        add_header 'Access-Control-Allow-Origin' "$http_origin";
    }

    if ($cors = "trueget") {
        add_header 'Access-Control-Allow-Origin' "$http_origin";
* F. `9 r9 G" \9 f7 j        add_header 'Access-Control-Allow-Credentials' 'true';
$ \% p# k' K8 H% _' `; i* I( p        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
% a( ?+ N& U: M: O3 o' x. ~5 M        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
    }

/ }( F- J" m8 w2 t2 r" `    if ($cors = "trueoptions") {
        add_header 'Access-Control-Allow-Origin' "$http_origin";

: p8 Y- Y, r9 Z! o, z0 z        #
  y* u+ R/ @+ z# P        # Om nom nom cookies
        #
1 {; [$ i8 j) M' P8 y/ {        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
1 r* B$ ]' ~- H$ q8 o0 m4 W
        #
        # Custom headers and headers various browsers *should* be OK with but aren't
9 K* r% C& l9 d  p' H        #
6 J8 ~/ W" Z7 S- ?        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';

        #
+ ~. `7 B( B2 R0 r0 l3 Q" i8 M  a        # Tell client that this pre-flight info is valid for 20 days
, }/ ]7 u3 g# I' j6 V        #
        add_header 'Access-Control-Max-Age' 1728000;
2 I5 I- W. I  ?3 M        add_header 'Content-Type' 'text/plain charset=UTF-8';
        add_header 'Content-Length' 0;
+ D0 q' S6 k6 f9 y8 c' L2 n% l        return 204;
% |* t7 W) x. v    }
. H& N$ [: g" A% M
/ M+ I( t) L* M8 \    if ($cors = "truepost") {
) i4 X( t; N0 {! a4 b5 M7 L" _9 Z        add_header 'Access-Control-Allow-Origin' "$http_origin";
) o" z: M- I- I8 D. L        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
- D2 g3 e5 h6 i. p/ ?' a# @, y        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
    }
, p: \5 @2 @5 i6 N. W5 J
}

* v0 H2 y: }5 p* R0 O, }: H
8 z- h8 x& S$ J5 X# k5 b+ x

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