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 - 52AV手機A片王|52AV.ONE

# CORS header support
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# One way to use this is by placing it into a file called "cors_support"
; j* s, W  [& m; \# under your Nginx configuration directory and placing the following
, W* e$ b$ R% X7 [$ `. b5 p) h# statement inside your **location** block(s):  m7 {! U7 {& {7 m' R' V7 F" c# u
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# include cors_support;
* M; x- R7 y5 [6 }#
' I9 P% b, l, u# As of Nginx 1.7.5, add_header supports an "always" parameter which
. j1 g- V  O# A# `- {3 m# allows CORS to work if the backend returns 4xx or 5xx status code.
$ W0 Q  p6 Z$ _6 A* V  Z#
8 y1 J# }+ D: l# C5 k; q7 w& O# For more information on CORS, please see: http://enable-cors.org/& q4 A/ X0 _& V
# Forked from this Gist: https://gist.github.com/michiel/10646401 S/ F7 T, t. R3 {7 o
#
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8 [. ]1 m" j- z$ j+ x2 fset $cors '';
; r2 F" ]3 Y- [; m0 ^5 Cif ($http_origin ~ '^https?://(localhost|www\.yourdomain\.com|www\.yourotherdomain\.com)$') {6 k( E) N; Z' N  P0 W
      set $cors 'true';0 ]' Y% G% H+ o# P
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if ($cors = 'true') {
  l2 Y+ b% u% e. t. ?. |5 }       add_header 'Access-Control-Allow-Origin' "$http_origin" always;% |# t5 C+ N- T/ I) H- l
      add_header 'Access-Control-Allow-Credentials' 'true' always;
5 {1 H: w9 |: c" q/ l, s       add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS' always;' Y# u: x& A# y! N7 x4 I, Q, f
      add_header 'Access-Control-Allow-Headers' 'Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Requested-With' always;
& N0 p7 X9 @/ K( @# l- |       # required to be able to read Authorization header in frontend9 p8 a: n# I. ^" p- c% B
      #add_header 'Access-Control-Expose-Headers' 'Authorization' always;
/ S$ A; G8 G  }$ {+ Y3 w2 U}
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if ($request_method = 'OPTIONS') {
4 E' d- z7 T, e" ~8 z: h) V" x2 ?       # Tell client that this pre-flight info is valid for 20 days
- [$ J9 s+ u! O9 m* H' c+ D5 L       add_header 'Access-Control-Max-Age' 1728000;/ |! C+ R2 B% |# Q, q% {" A
      add_header 'Content-Type' 'text/plain charset=UTF-8';: B$ D" O) y0 ~2 `* A
      add_header 'Content-Length' 0;
8 ^8 ?9 H& r/ `/ ]* ]! q$ Q       return 204;
* A0 }$ v( b6 I. s' k}

if ( $request_method !~ ^(GET|POST|HEAD|OPTIONS|PUT|PATCH|DELETE)$ ) {    return 444;( g8 u: _. N0 L9 z) C
}
" R8 e. v+ l: Rset $origin $http_origin;
) O* n4 J5 c7 j9 aif ($origin !~ '^https?://(subdom1|subdom2)\.yourdom\.zone$') {- J: R3 n/ w9 ~( j5 P) p6 E3 S
   set $origin 'https://default.yourdom.zone';( K- t- t$ g- {: |" Q' t
}
; Z5 }4 M8 n' ?7 b$ Pif ($request_method = 'OPTIONS') {! U# L. A9 z9 w" T) W
   add_header 'Access-Control-Allow-Origin' "$origin" always;
' V5 z/ v6 J3 a    add_header 'Access-Control-Allow-Methods' 'GET, POST, PATCH, PUT, DELETE, OPTIONS' always;
3 _2 h; e! f% U3 [    add_header 'Access-Control-Allow-Headers' 'Content-Type, Accept, Authorization' always;. @0 C4 t7 ?! w0 o* y# Q) q
   add_header 'Access-Control-Allow-Credentials' 'true' always;5 f7 }% H3 f# y) X) f
   add_header Access-Control-Max-Age 1728000; #20 days
: i2 a! A, C% L: W' m4 {( Z% l    add_header Content-Type 'text/plain charset=UTF-8';: |2 R6 g' A0 n5 b  x- |' o
   add_header Content-Length 0;
! y! f2 E7 F  {2 ?# B% v7 U    return 204;
% u- V9 T+ e, T. m: S; O4 g/ S}
9 ^' R+ J: ]2 I0 ^0 M) oif ($request_method ~ '(GET|POST|PATCH|PUT|DELETE)') {
$ a9 L! Q1 S; e( T6 U7 C    add_header Access-Control-Allow-Origin "$origin" always;
- z8 r- k* W+ {) H- d    add_header Access-Control-Allow-Methods 'GET, POST, PATCH, PUT, DELETE, OPTIONS' always;9 ]. P0 T! x+ ~/ g; n0 w' i" W
   add_header Access-Control-Allow-Headers 'Content-Type, Accept, Authorization' always;
$ N* d: }8 w0 v0 [  W$ Y    add_header Access-Control-Allow-Credentials true always;
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# based on https://gist.github.com/4165271/
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# ], K8 C' w' S- H3 p# Slightly tighter CORS config for nginx2 `0 L; |6 S0 w, g/ R; G. d, h3 S  V
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# A modification of https://gist.github.com/1064640/ to include a white-list of URLs' ~$ f& M0 T2 |5 B3 N- x* u
#
* o3 }: F. {1 g- A: f: N& C# Despite the W3C guidance suggesting that a list of origins can be passed as part of
& g& L5 g8 Q+ w/ |  `# Access-Control-Allow-Origin headers, several browsers (well, at least Firefox)
6 T, E5 k* D% L; e5 v; [# don't seem to play nicely with this.
: L  Y* t8 \- j6 Q3 r& W#
/ P9 K, F7 p: ^" l# To avoid the use of 'Access-Control-Allow-Origin: *', use a simple-ish whitelisting+ p  \5 h. e1 o9 w
# method to control access instead.
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# NB: This relies on the use of the 'Origin' HTTP Header.
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location / {# u8 P4 o& F/ e. D) f
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if ($http_origin ~* (^https?://([^/]+\.)*(domainone|domaintwo)\.com$)) {  E4 H" ~, n, Z+ y1 q
      set $cors "true";
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# Nginx doesn't support nested If statements. This is where things get slightly nasty.1 s: I- l% H- E* `: H, k
# Determine the HTTP request method used
0 P4 N% X2 L' ~ if ($request_method = 'OPTIONS') {6 S* A+ _* g2 _/ W. q
      set $cors "${cors}options";( b0 I% l1 L' k+ i" i
}
. J$ y" k, u0 ?! W2 j if ($request_method = 'GET') {
) m/ B" u/ ?% q# U. Z" d" {       set $cors "${cors}get";5 \& V2 b# `& @; B
}
( z: A; `1 F# z; t if ($request_method = 'POST') {" x* U0 P( K1 k% S
      set $cors "${cors}post";
$ j' T$ `  p) Z; l9 q }
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9 [5 X  x4 f6 W if ($cors = "true") {3 Y3 a$ J1 B2 t
      # Catch all incase there's a request method we're not dealing with properly( {; d7 n# }/ t* N
      add_header 'Access-Control-Allow-Origin' "$http_origin";
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6 F2 A* M* B; [ if ($cors = "trueget") {. l8 T) e3 }4 k* _
      add_header 'Access-Control-Allow-Origin' "$http_origin";
+ h: j( `8 v3 ?2 m       add_header 'Access-Control-Allow-Credentials' 'true';
9 M* }7 O7 y4 Z4 ]  b' Y# z       add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';9 k) o, h6 U. @# q
      add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';3 F6 J; `) i7 x) b7 ^9 m
}
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5 y( H, P' A# E if ($cors = "trueoptions") {
* B) D' z& [5 P+ _8 J8 a, k5 X       add_header 'Access-Control-Allow-Origin' "$http_origin";* J; }+ S4 h2 q- s. H

* R, b5 X( l4 x! @& P) A       #; H5 _5 g& @  k  k$ U
      # Om nom nom cookies
7 [4 q$ O! Z$ _% J       #1 d. P& Q% u; j: W! p
      add_header 'Access-Control-Allow-Credentials' 'true';
+ s! I) |0 M# u       add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';9 g( U$ H' C3 X

8 C& V3 K1 ]/ c7 n4 E       #
6 a+ x% h1 z. t6 D       # Custom headers and headers various browsers *should* be OK with but aren't: `3 ]' [5 t, N6 X/ h' C2 \
      #3 ]: x$ j; q+ I3 c/ X
      add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';( |  q5 h$ C6 D7 w6 W# W
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      #
+ j9 `( }6 b. P       # Tell client that this pre-flight info is valid for 20 days9 D* ~/ Y1 C1 X" s% t& ^
      #
/ x2 G: F: P! I0 F# R       add_header 'Access-Control-Max-Age' 1728000;
* {" B9 o+ Q. D' d; f       add_header 'Content-Type' 'text/plain charset=UTF-8';
3 H* I" z& T- a% y0 ?1 h) w       add_header 'Content-Length' 0;
" l  R+ j. ]! c# u3 z       return 204;
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if ($cors = "truepost") {
& z/ a' ?0 C$ ]" ?: G; K9 E" y1 n       add_header 'Access-Control-Allow-Origin' "$http_origin";' O8 P0 w) o' _) o
      add_header 'Access-Control-Allow-Credentials' 'true';. Z, v! l" p# G' @7 `$ M
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
4 O' O. Z: o- z       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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