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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]

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:
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# CORS header support
  `7 ^& G8 u( d' U0 ~) [. m#- ?  Y5 V0 I* X4 h
# One way to use this is by placing it into a file called "cors_support"/ U# G0 ?1 R* C
# under your Nginx configuration directory and placing the following4 c, z" Y" R" |% n7 @
# statement inside your **location** block(s):* f, e6 v0 f0 d6 k. f
#
% W" P3 Q+ |7 d1 z#   include cors_support;4 o! m" E9 z0 }2 g! B
#
" }4 \7 x) s3 D# As of Nginx 1.7.5, add_header supports an "always" parameter which  q5 n: W3 c+ r, G  O( U
# allows CORS to work if the backend returns 4xx or 5xx status code.
9 k: r+ z& q5 R) o  k! P+ g+ N#
2 M* e+ }' D, ?3 @1 q# For more information on CORS, please see: http://enable-cors.org/4 F# n6 }0 J9 M7 C! K
# Forked from this Gist: https://gist.github.com/michiel/10646404 D+ H& D7 `0 k* X
#
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set $cors '';
& f/ J% m( M# Tif ($http_origin ~ '^https?://(localhost|www\.yourdomain\.com|www\.yourotherdomain\.com)$') {
5 h+ P1 S4 E; m* p* e        set $cors 'true';, N% ]' ]0 i0 W; p! a
}
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if ($cors = 'true') {
& r* ?: K/ w2 L5 B( b        add_header 'Access-Control-Allow-Origin' "$http_origin" always;6 o2 }$ n. }: @4 @" U# r. w& x' o
        add_header 'Access-Control-Allow-Credentials' 'true' always;
  u4 U+ i6 z1 t+ @5 {4 M8 E        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS' always;
' R: k' D$ p* W; ~# Y4 D        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;
$ n* {5 d, d" {7 R& M        # required to be able to read Authorization header in frontend' U* j  ?1 U' Q$ x1 g* V
        #add_header 'Access-Control-Expose-Headers' 'Authorization' always;
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if ($request_method = 'OPTIONS') {8 {) I% t1 p  \( Q2 T! C
        # Tell client that this pre-flight info is valid for 20 days) S6 u6 V7 m4 _/ ~
        add_header 'Access-Control-Max-Age' 1728000;7 h- a0 ~0 b* G1 x
        add_header 'Content-Type' 'text/plain charset=UTF-8';8 y% \, i3 M) b$ w1 `
        add_header 'Content-Length' 0;5 r0 c3 W# |& _+ F" b/ l% c
        return 204;3 M0 ~7 h* |+ l! N7 t- b/ A9 Z3 y
}
https://gist.github.com/Stanback/7145487#file-nginx-conf 的討論範例:
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if ( $request_method !~ ^(GET|POST|HEAD|OPTIONS|PUT|PATCH|DELETE)$ ) {     return 444;
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set $origin $http_origin;
+ \9 ^  P; B) \if ($origin !~ '^https?://(subdom1|subdom2)\.yourdom\.zone$') {0 h9 o2 [& J+ n+ I3 p
     set $origin 'https://default.yourdom.zone';( N4 Z- v  |+ D' n7 x" ?+ O
}
; d* t7 B0 _, P7 x7 Lif ($request_method = 'OPTIONS') {9 J- \8 ]+ J1 k7 c
     add_header 'Access-Control-Allow-Origin' "$origin" always;
: l1 y0 a$ W& [" M5 z     add_header 'Access-Control-Allow-Methods' 'GET, POST, PATCH, PUT, DELETE, OPTIONS' always;2 u! _% ~( |" B( L
     add_header 'Access-Control-Allow-Headers' 'Content-Type, Accept, Authorization' always;4 h' |4 |2 @# h1 u+ z' f% a" w
     add_header 'Access-Control-Allow-Credentials' 'true' always;
0 v' g$ h; ]- |     add_header Access-Control-Max-Age 1728000;   #20 days   " y. [/ n+ h0 P0 a1 |
     add_header Content-Type 'text/plain charset=UTF-8';, T5 W" n; t' u
     add_header Content-Length 0;
3 S; r- ~  f* Y     return 204;
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, ~! n5 ~% f; X: Rif ($request_method ~ '(GET|POST|PATCH|PUT|DELETE)') {
; Y7 `0 Q2 F7 H$ t* P  r% e     add_header Access-Control-Allow-Origin "$origin" always;5 A  o0 e3 X, j; m9 ]& `
     add_header Access-Control-Allow-Methods 'GET, POST, PATCH, PUT, DELETE, OPTIONS' always;
; o" \# }6 _5 M+ r# M+ B     add_header Access-Control-Allow-Headers 'Content-Type, Accept, Authorization' always;
$ V8 F5 w7 z4 Q, h     add_header Access-Control-Allow-Credentials true always;3 X6 ]3 u* M# [
}
Access-Control-Allow-Origin Multiple Origin Domains? 的例子:
# based on https://gist.github.com/4165271/  ^" Z+ G. ?7 J/ C- e# N4 w( K
#
/ ~7 D1 c8 G6 n5 b% Q1 u! \1 _# Slightly tighter CORS config for nginx8 g& Z- G8 n' F6 J+ \
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# A modification of https://gist.github.com/1064640/ to include a white-list of URLs4 r4 ]: k6 j! W6 B; z" e" m+ W
#
6 T) y4 }& C& `0 y; ]8 T# Despite the W3C guidance suggesting that a list of origins can be passed as part of
" v, _# U9 F0 a! ?3 ~# Access-Control-Allow-Origin headers, several browsers (well, at least Firefox)! ^5 @1 Z" j- f4 d! x3 ~4 h
# don't seem to play nicely with this.+ t6 ^/ z0 U3 V$ C& J4 K. I& ^
#! w9 @1 p% g0 X# p& r. S
# To avoid the use of 'Access-Control-Allow-Origin: *', use a simple-ish whitelisting
$ I% |% ]2 K; n4 |0 ^: i# method to control access instead.1 y( ]3 p# }2 v; i; V# J5 }
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# NB: This relies on the use of the 'Origin' HTTP Header.
# N+ e3 b9 f$ e& L1 w% ~& q! p- _
; f0 }8 ]  t- J4 \( Klocation / {
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& r' U) [. y3 E0 X    if ($http_origin ~* (^https?://([^/]+\.)*(domainone|domaintwo)\.com$)) {+ [0 A$ N1 o# b3 }- ?6 l0 a
        set $cors "true";" K4 P6 f6 B6 u4 T2 r2 v) U' u$ y
    }
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    # Nginx doesn't support nested If statements. This is where things get slightly nasty.& H  O7 a& _3 d3 g- g
    # Determine the HTTP request method used
: T/ j: f4 H, _; D, l; [" s    if ($request_method = 'OPTIONS') {
3 E0 Q* d- Y$ p2 V% M        set $cors "${cors}options";
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    if ($request_method = 'GET') {6 z2 o, l' n0 j0 n& F( a, k
        set $cors "${cors}get";
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    if ($request_method = 'POST') {- J8 r0 z& Z, N* C, U) |
        set $cors "${cors}post";. P! q, N' K1 r- c! T7 h8 r) {2 F$ g
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    if ($cors = "true") {
6 u1 i! x7 d6 a5 b# |3 a        # Catch all incase there's a request method we're not dealing with properly6 m" [/ t3 o2 S5 ]1 A. o
        add_header 'Access-Control-Allow-Origin' "$http_origin";
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" @. M! c6 c; O4 N0 E- W    if ($cors = "trueget") {
* Z$ v2 M! Z( V( l3 U        add_header 'Access-Control-Allow-Origin' "$http_origin";
; D; |! _- U$ r# E! b" P        add_header 'Access-Control-Allow-Credentials' 'true';1 U% y* g, t% B# m5 X
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
) u# U; ~# n2 T. `( ]        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
3 U, q  G2 T5 J5 s3 T    }
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    if ($cors = "trueoptions") {
. y- \+ L/ \7 e1 C3 \6 k; I        add_header 'Access-Control-Allow-Origin' "$http_origin";( |" f6 D  V- h0 o) n  t
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        #: N' c1 Z8 h$ g( k
        # Om nom nom cookies: g/ S4 A! v' U6 D! _4 R5 l2 F
        #% J( ^9 E/ A: t
        add_header 'Access-Control-Allow-Credentials' 'true';* l( G, L" e, N& l1 r
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';+ W$ p2 L; R& d2 ~- e; ]. S
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        #
# i& i% X+ X+ \. A1 A) y        # Custom headers and headers various browsers *should* be OK with but aren't
& F. n! s* s# y        #3 v$ J. o1 l/ Q. Z
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';7 E+ z) N. X# O
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        #
+ m. u/ h" ^* S        # Tell client that this pre-flight info is valid for 20 days% i+ ~+ z  ?& _, o& G* b( d! J- O5 _
        #- c9 T$ E6 X9 D/ \3 _8 }) w* _
        add_header 'Access-Control-Max-Age' 1728000;3 P6 E- B6 s0 a
        add_header 'Content-Type' 'text/plain charset=UTF-8';& @+ d5 O8 e1 b) b
        add_header 'Content-Length' 0;3 K3 ^+ b  `. u7 ]
        return 204;
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1 Z1 L1 r2 d9 D6 X% H* g    if ($cors = "truepost") {
0 L4 W& ~: C2 s* p        add_header 'Access-Control-Allow-Origin' "$http_origin";
6 m3 X' z; t% c7 C; z* _        add_header 'Access-Control-Allow-Credentials' 'true';) c! }8 Q5 M" J3 Z* K( q/ p
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';- D8 N& n+ L8 t/ E- F" `
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
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}

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