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"
8 @% J! \& w$ J7 T6 ~# under your Nginx configuration directory and placing the following, ]$ r6 Z0 s" C
# statement inside your **location** block(s):4 I3 t% O7 W8 G6 U% }
#$ S, g4 B5 l1 ]8 i- H' M) b
# include cors_support;3 ^2 X+ f' a: E; c& ^$ `; y: o
#
. }4 a# e0 Z$ V, ^3 |+ e# As of Nginx 1.7.5, add_header supports an "always" parameter which7 l" l+ V) _( m( T
# allows CORS to work if the backend returns 4xx or 5xx status code.5 |- S, q; P$ C# \" u
#
! @$ ]+ h, L8 \; Y7 [! l# For more information on CORS, please see: http://enable-cors.org/# [) q5 p/ z8 N! G2 P  y- o
# Forked from this Gist: https://gist.github.com/michiel/1064640; `1 f3 m; w  o- I! i' @2 y( p
#
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4 i- k: Q7 Q  ^set $cors '';
& H# T1 r- i( Q& ]% E/ w. b* hif ($http_origin ~ '^https?://(localhost|www\.yourdomain\.com|www\.yourotherdomain\.com)$') {
9 n, N- I* m9 Q* C3 \/ s6 N       set $cors 'true';
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8 A5 f$ t; W- U' Z3 n* x: v& M7 kif ($cors = 'true') {7 F- c/ d& g9 l  s7 Y
      add_header 'Access-Control-Allow-Origin' "$http_origin" always;
$ W; U# |. U- E& i8 ?; ]# X' J       add_header 'Access-Control-Allow-Credentials' 'true' always;
  T8 U( h. F4 ~$ m. x' u4 V       add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS' always;
2 f8 }, G# L0 B4 W) x       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;
  r2 r4 j8 I' y$ z% p       # required to be able to read Authorization header in frontend  S3 F" c) Y) }9 N( n
      #add_header 'Access-Control-Expose-Headers' 'Authorization' always;4 G7 t' v4 t- H9 C, n$ j
}- o! Z8 j" Y- C2 \0 L: `* h9 h) P& H

4 l7 ^$ U+ k9 Z. x2 yif ($request_method = 'OPTIONS') {  Z! o2 t( r, y4 o" E
      # Tell client that this pre-flight info is valid for 20 days  K; C7 z# s6 ]
      add_header 'Access-Control-Max-Age' 1728000;
6 n6 |( D! g1 _; y       add_header 'Content-Type' 'text/plain charset=UTF-8';  l, R- e2 c! B4 ?6 u1 v5 [3 [) H/ i
      add_header 'Content-Length' 0;
  w2 P; g5 K: l8 R. [" I5 s3 t3 d       return 204;
1 L2 z! F' L# _2 q3 ]}

if ( $request_method !~ ^(GET|POST|HEAD|OPTIONS|PUT|PATCH|DELETE)$ ) {    return 444;
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6 l2 ~3 n9 M' Z! K1 f5 ]. Yset $origin $http_origin;0 l7 l, A; w# v  D. G
if ($origin !~ '^https?://(subdom1|subdom2)\.yourdom\.zone$') {- d) [+ V7 ]8 v, o. a! q# U0 ~8 {
   set $origin 'https://default.yourdom.zone';$ a/ X6 N; |4 F
}! o8 f! D; t) U6 D& ~% U+ X
if ($request_method = 'OPTIONS') {# f; O% F  b: V. J/ A
   add_header 'Access-Control-Allow-Origin' "$origin" always;8 m' ~9 T9 R; w: }& h3 t! y
   add_header 'Access-Control-Allow-Methods' 'GET, POST, PATCH, PUT, DELETE, OPTIONS' always;
   add_header 'Access-Control-Allow-Headers' 'Content-Type, Accept, Authorization' always;
' L# |7 c" R! b! Z0 T4 `    add_header 'Access-Control-Allow-Credentials' 'true' always;  _: C+ E) w* [
   add_header Access-Control-Max-Age 1728000; #20 days
" g7 |1 j! A4 [) d8 k    add_header Content-Type 'text/plain charset=UTF-8';
0 b  e% T2 a; a7 e    add_header Content-Length 0;
: U7 G9 Q. z* _( i8 ?    return 204;
- [3 s5 v' j, y) @" ]}
% W: T* K$ a$ F& N* i' ~if ($request_method ~ '(GET|POST|PATCH|PUT|DELETE)') {$ Z# b  V/ J+ }! V9 [: ?
   add_header Access-Control-Allow-Origin "$origin" always;7 W, U8 i5 ~, R( C( B: q
   add_header Access-Control-Allow-Methods 'GET, POST, PATCH, PUT, DELETE, OPTIONS' always;
1 s7 F0 l1 N6 r5 W+ u    add_header Access-Control-Allow-Headers 'Content-Type, Accept, Authorization' always;
& ~3 |. q( a& V    add_header Access-Control-Allow-Credentials true always;% T- g5 a  G/ b% i; O
}

# based on https://gist.github.com/4165271/
# y0 v4 W# ]/ j& e) N% H#
% z8 B: Q5 h6 s# Slightly tighter CORS config for nginx
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# A modification of https://gist.github.com/1064640/ to include a white-list of URLs$ V( A# Q+ m; G+ ?" p9 K2 d
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# Despite the W3C guidance suggesting that a list of origins can be passed as part of; w, m* c& }, A/ e3 D  ^
# Access-Control-Allow-Origin headers, several browsers (well, at least Firefox)
( {) K; J$ c: p7 U! @2 M# don't seem to play nicely with this.# r3 a3 n2 `$ a9 m( l+ u2 i# f, J
#
% Z$ N& E& G  _0 A- ], y( R2 i# To avoid the use of 'Access-Control-Allow-Origin: *', use a simple-ish whitelisting
: ~7 b7 U# ^, Z% X8 T# method to control access instead.
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  T  z& d5 D" H; U# `# z# NB: This relies on the use of the 'Origin' HTTP Header.9 U+ L+ P9 T& G1 |2 E" e2 T! W3 @# f
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location / {
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if ($http_origin ~* (^https?://([^/]+\.)*(domainone|domaintwo)\.com$)) {
( T' `+ C* ~% ?* I3 q4 p       set $cors "true";
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# Nginx doesn't support nested If statements. This is where things get slightly nasty.
7 @" \. ?/ l, | # Determine the HTTP request method used8 D; J6 L3 X% A/ v+ t
if ($request_method = 'OPTIONS') {
0 A9 m7 z$ d" ]0 w; h# ?: o9 t       set $cors "${cors}options";
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if ($request_method = 'GET') {
& J2 c. {7 u  A       set $cors "${cors}get";: |' I) e/ @# t0 a& Q7 ?' W" D
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if ($request_method = 'POST') {0 J: _( ~8 m) C$ D; b+ Y1 l
      set $cors "${cors}post";7 [1 p4 e) i8 T4 P! h' R4 T
}- p, W8 P; f+ y' L% P# E

( }4 p- {. g1 A, t0 |9 o8 e6 K, X if ($cors = "true") {
      # Catch all incase there's a request method we're not dealing with properly+ i) X/ [. p4 Y; Z
      add_header 'Access-Control-Allow-Origin' "$http_origin";4 J) i3 @: F# o& K# ~, p
}
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if ($cors = "trueget") {
% L% Q; m; {$ n2 t0 Q, F  q       add_header 'Access-Control-Allow-Origin' "$http_origin";
# |7 ]1 Y% Z7 [6 Q       add_header 'Access-Control-Allow-Credentials' 'true';
9 _2 K( `2 g4 f# i       add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
8 `  @! G. L. i+ Y% D# Z7 p6 M       add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';9 X8 l9 O$ N) w& e" v' p' @
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if ($cors = "trueoptions") {+ n& |# a+ T( c
      add_header 'Access-Control-Allow-Origin' "$http_origin";5 [/ t- J% A2 A5 x/ p; D
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      #) e7 p% Y, s5 l, o  e& y5 j; F
      # Om nom nom cookies6 x) U' a) R# X
      #
7 H- \. g' [1 W1 P; Q$ |       add_header 'Access-Control-Allow-Credentials' 'true';" {: e$ N1 \0 ]% N2 z4 h7 a5 p$ C
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';+ ^" k6 }( q+ @6 q: }: s2 T, p
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      #
  w( s6 i( I6 V9 h4 @/ H       # Custom headers and headers various browsers *should* be OK with but aren't
# n( W+ v' ^/ {( ^$ k: ]9 B6 G       #
1 v6 B* b0 U7 }' H" P* {       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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      #
2 p9 u: s) y' I0 z       # Tell client that this pre-flight info is valid for 20 days
, ^( q) g7 R, }; P, t+ k       #: p+ E: J# p9 Q, I6 C* b
      add_header 'Access-Control-Max-Age' 1728000;
5 Y) a4 [0 W9 z! {! s       add_header 'Content-Type' 'text/plain charset=UTF-8';
# d' _# D- ^; `' V' o! W       add_header 'Content-Length' 0;2 B8 ?" z: V7 f% [9 D+ D* s
      return 204;: V1 A6 Z+ T' K
}
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if ($cors = "truepost") {4 {# U/ b# z! q! U) g2 _- e7 J
      add_header 'Access-Control-Allow-Origin' "$http_origin";
- E; }1 A: d0 t5 @3 I* P  U       add_header 'Access-Control-Allow-Credentials' 'true';
' ^, E0 O5 x, `% h+ G& x: ^- V       add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';- x, ^: W( s5 H7 e+ W
      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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}