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 support3 O8 ?: E8 d' G  `# t: N
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# One way to use this is by placing it into a file called "cors_support"
/ S, |9 p/ f7 Y& L6 R* n8 n# under your Nginx configuration directory and placing the following# w5 A9 m, N+ G# i( I
# statement inside your **location** block(s):
1 N" P7 A4 I" r; g, A/ ^* v#
6 C4 U  j5 j) v& c0 m7 X: d# include cors_support;1 ~& X+ M& ?% Y+ i; M
#4 M) G9 K4 y0 q$ k% t
# As of Nginx 1.7.5, add_header supports an "always" parameter which
; k, t6 g2 ]+ x" s" ]. ~7 ?+ A# allows CORS to work if the backend returns 4xx or 5xx status code.
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# For more information on CORS, please see: http://enable-cors.org/9 L* e4 f! F4 l: `& S% U
# Forked from this Gist: https://gist.github.com/michiel/1064640
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set $cors '';  M& _1 ~5 B* b4 ^
if ($http_origin ~ '^https?://(localhost|www\.yourdomain\.com|www\.yourotherdomain\.com)$') {
6 ]5 M; {  V1 y5 D% r       set $cors 'true';
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# j% n0 U' p( Q# M, ?if ($cors = 'true') {6 n7 y% B  [- p8 M8 X" w2 E
      add_header 'Access-Control-Allow-Origin' "$http_origin" always;
- h" w# m  i7 s8 \       add_header 'Access-Control-Allow-Credentials' 'true' always;
. R* s6 h( [' E$ }& i: }: h       add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS' always;
" C' w" j/ v" l1 a/ q       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;
9 Q& F3 l) w- c/ u       # required to be able to read Authorization header in frontend
/ E4 ]; p7 i! Q  z+ b8 I. w0 X       #add_header 'Access-Control-Expose-Headers' 'Authorization' always;5 }* V6 g# U! e1 y: W; H( c
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if ($request_method = 'OPTIONS') {& g7 z$ _/ X1 Y0 q7 X: E* r% R+ E
      # Tell client that this pre-flight info is valid for 20 days
6 v- i* Y) {# K( B% p8 s       add_header 'Access-Control-Max-Age' 1728000;- T- v& g( e$ M
      add_header 'Content-Type' 'text/plain charset=UTF-8';
$ `& X& b) a1 T3 }" u       add_header 'Content-Length' 0;
0 r4 Y0 S( j( {" q       return 204;5 c5 G  {1 V6 G. C) D1 M
}

if ( $request_method !~ ^(GET|POST|HEAD|OPTIONS|PUT|PATCH|DELETE)$ ) {    return 444;
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set $origin $http_origin;
9 |$ n2 ~) Z/ ]. R  ~2 qif ($origin !~ '^https?://(subdom1|subdom2)\.yourdom\.zone$') {
' r' }) C& h+ A9 Z2 M5 f$ M    set $origin 'https://default.yourdom.zone';$ q/ F  T+ h7 s9 z2 o4 |* _
}
: m/ {1 J, P3 z6 [if ($request_method = 'OPTIONS') {) d- {4 N5 G/ h; G" u3 F$ Z% T. a
   add_header 'Access-Control-Allow-Origin' "$origin" always;
- M- _7 j) n. Q: l; E0 B    add_header 'Access-Control-Allow-Methods' 'GET, POST, PATCH, PUT, DELETE, OPTIONS' always;" W. \$ W* {, W* f8 j% F2 t% n
   add_header 'Access-Control-Allow-Headers' 'Content-Type, Accept, Authorization' always;3 J( y5 I# s0 C4 |" m/ @
   add_header 'Access-Control-Allow-Credentials' 'true' always;
! Q) L" v* g$ @( b    add_header Access-Control-Max-Age 1728000; #20 days
& E# w0 j" {! M( K0 y    add_header Content-Type 'text/plain charset=UTF-8';
" P; ~) q( N9 ?8 b5 z    add_header Content-Length 0;' c6 P5 f* O& L$ i0 ]+ A$ Q8 E! r
   return 204;& F. ?$ t7 p* j
}
3 C" v8 H7 q& N9 u9 bif ($request_method ~ '(GET|POST|PATCH|PUT|DELETE)') {- I; {+ P! ~" ~( W! V
   add_header Access-Control-Allow-Origin "$origin" always;
5 n$ `+ K8 C0 I, w+ z& [    add_header Access-Control-Allow-Methods 'GET, POST, PATCH, PUT, DELETE, OPTIONS' always;1 P8 T( |7 t) b2 m5 b+ a
   add_header Access-Control-Allow-Headers 'Content-Type, Accept, Authorization' always;& h( }3 S: {+ v9 h$ b3 A2 Y
   add_header Access-Control-Allow-Credentials true always;
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# based on https://gist.github.com/4165271/
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# Slightly tighter CORS config for nginx  k+ l* l) u+ a6 X
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# A modification of https://gist.github.com/1064640/ to include a white-list of URLs
/ c  w- }* y$ K* d7 r#
$ D4 M" j8 W( T* ^( Q# v# Despite the W3C guidance suggesting that a list of origins can be passed as part of
4 b: f+ F$ e5 i5 g0 f# X# Access-Control-Allow-Origin headers, several browsers (well, at least Firefox)
% O' P: y1 \' R0 ~+ N2 Q# don't seem to play nicely with this.- Y3 @) j% I9 \
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# To avoid the use of 'Access-Control-Allow-Origin: *', use a simple-ish whitelisting$ E' P# L/ v6 W5 m
# method to control access instead.9 X' _0 {1 G, X; C+ e9 a/ F3 Z! u
#
1 R; }7 F$ w) k) X8 w; I4 C- v# NB: This relies on the use of the 'Origin' HTTP Header.
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# g" t0 O: e! X: N# i2 ]# plocation / {
$ ^- P. {$ h5 q
0 b: t. A2 S' |7 a if ($http_origin ~* (^https?://([^/]+\.)*(domainone|domaintwo)\.com$)) {# w$ u) q( P3 I6 |' \
      set $cors "true";
  |7 U" h6 I: }7 j  n }
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# Nginx doesn't support nested If statements. This is where things get slightly nasty.
1 }6 h; y" D0 Z. R # Determine the HTTP request method used! k5 |  N9 U% V
if ($request_method = 'OPTIONS') {
& T, k8 y5 x( Q- R7 k8 W       set $cors "${cors}options";0 }! U4 ]) T! r* O) I- |% S# q& S
}
& r% X8 e$ v- W) x: r1 _ if ($request_method = 'GET') {; o  O  J9 h. }# }8 Y# X
      set $cors "${cors}get";
/ S7 {# B, J0 L1 a$ I4 M  k }
7 q" i4 Z' @' H3 m% p' g( |3 s if ($request_method = 'POST') {
$ g, `& p7 {! H6 e: j" k       set $cors "${cors}post";
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if ($cors = "true") {
" Q! E& w2 c, e( b0 @& }0 J/ y       # Catch all incase there's a request method we're not dealing with properly
# i1 S8 W: o4 l5 U       add_header 'Access-Control-Allow-Origin' "$http_origin";
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if ($cors = "trueget") {- O8 Z4 w* r' }. ~
      add_header 'Access-Control-Allow-Origin' "$http_origin";/ V6 C: D5 _& J1 o& o- S
      add_header 'Access-Control-Allow-Credentials' 'true';
/ i1 N/ |5 N+ ~9 F       add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
' |. }' O% N% h+ F! |% o- ^       add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';9 W1 @( g% c' I; {0 d' K
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) M4 \- n# E7 |  @3 W6 @ if ($cors = "trueoptions") {) K" \' Y% C- y; |: e, @% o
      add_header 'Access-Control-Allow-Origin' "$http_origin";3 }; k% @$ W+ B: l

6 o9 O* J0 g7 _0 m9 T! U       #
/ r5 u2 T1 ~/ x6 v& B       # Om nom nom cookies/ n- U/ u% I+ l) P
      #+ Q3 H: m5 [% a8 m* ]+ z
      add_header 'Access-Control-Allow-Credentials' 'true';) y: j$ z4 x# g: ~" l+ n5 I2 u  J. T
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';, r' |) Q6 T1 b4 m1 P) D0 h* c

2 F, k1 k5 Q( p! ?# T) b       #
4 \. N- M6 I# b6 x% b. w" M' g       # Custom headers and headers various browsers *should* be OK with but aren't+ G; ^' {2 k. S8 W
      #4 m9 M# w0 Q8 _" T* c( k! K
      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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      # Tell client that this pre-flight info is valid for 20 days
% O+ ]' k/ p6 |! r7 d       #$ b, U& F: h8 \2 K
      add_header 'Access-Control-Max-Age' 1728000;% W8 |* I% H( J1 M0 O! S
      add_header 'Content-Type' 'text/plain charset=UTF-8';! |( D3 p7 T( H, R7 z
      add_header 'Content-Length' 0;' {! i  I5 H8 l( E6 k9 j
      return 204;0 z$ u! \2 M, j$ l
}$ F) V& Q: K- G. K/ Q

& y1 [2 b0 O  X9 Q/ w) ~; c9 l9 p if ($cors = "truepost") {
6 |8 e4 n; r; W$ Q' @       add_header 'Access-Control-Allow-Origin' "$http_origin";
( v) T* G1 h" ?: G# I, l       add_header 'Access-Control-Allow-Credentials' 'true';
+ W. {! P' N4 h: O5 L       add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
- Q5 P& N  J% W       add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';7 s# j; Z% V7 a2 N3 B
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}