{"id":138,"date":"2026-01-09T18:16:00","date_gmt":"2026-01-09T10:16:00","guid":{"rendered":"https:\/\/mitongxue.cn\/?p=138"},"modified":"2026-06-03T18:31:02","modified_gmt":"2026-06-03T10:31:02","slug":"%e8%b7%a8%e5%9f%9f-cors","status":"publish","type":"post","link":"https:\/\/mitongxue.cn\/index.php\/2026\/01\/09\/%e8%b7%a8%e5%9f%9f-cors\/","title":{"rendered":"\u8de8\u57df-CORS"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><code>CORS<\/code>\u662f\u57fa\u4e8e<code>http1.1<\/code>\u7684\u4e00\u79cd\u8de8\u57df\u89e3\u51b3\u65b9\u6848\uff0c\u5b83\u7684\u5168\u79f0\u662f<strong>C<\/strong>ross-<strong>O<\/strong>rigin <strong>R<\/strong>esource <strong>S<\/strong>haring\uff0c\u8de8\u57df\u8d44\u6e90\u5171\u4eab\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b83\u7684\u603b\u4f53\u601d\u8def\u662f\uff1a<strong>\u5982\u679c\u6d4f\u89c8\u5668\u8981\u8de8\u57df\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u8d44\u6e90\uff0c\u9700\u8981\u83b7\u5f97\u670d\u52a1\u5668\u7684\u5141\u8bb8<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u8981\u77e5\u9053\uff0c\u4e00\u4e2a\u8bf7\u6c42\u53ef\u4ee5\u9644\u5e26\u5f88\u591a\u4fe1\u606f\uff0c\u4ece\u800c\u4f1a\u5bf9\u670d\u52a1\u5668\u9020\u6210\u4e0d\u540c\u7a0b\u5ea6\u7684\u5f71\u54cd<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\u6709\u7684\u8bf7\u6c42\u53ea\u662f\u83b7\u53d6\u4e00\u4e9b\u65b0\u95fb\uff0c\u6709\u7684\u8bf7\u6c42\u4f1a\u6539\u52a8\u670d\u52a1\u5668\u7684\u6570\u636e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9488\u5bf9\u4e0d\u540c\u7684\u8bf7\u6c42\uff0cCORS \u89c4\u5b9a\u4e86\u4e09\u79cd\u4e0d\u540c\u7684\u4ea4\u4e92\u6a21\u5f0f\uff0c\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7b80\u5355\u8bf7\u6c42<\/strong><\/li>\n\n\n\n<li><strong>\u9700\u8981\u9884\u68c0\u7684\u8bf7\u6c42<\/strong><\/li>\n\n\n\n<li><strong>\u9644\u5e26\u8eab\u4efd\u51ed\u8bc1\u7684\u8bf7\u6c42<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e09\u79cd\u6a21\u5f0f\u4ece\u4e0a\u5230\u4e0b\u5c42\u5c42\u9012\u8fdb\uff0c\u8bf7\u6c42\u53ef\u4ee5\u505a\u7684\u4e8b\u8d8a\u6765\u8d8a\u591a\uff0c\u8981\u6c42\u4e5f\u8d8a\u6765\u8d8a\u4e25\u683c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u5206\u522b\u8bf4\u660e\u4e09\u79cd\u8bf7\u6c42\u6a21\u5f0f\u7684\u5177\u4f53\u89c4\u8303\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u7b80\u5355\u8bf7\u6c42<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u6d4f\u89c8\u5668\u7aef\u8fd0\u884c\u4e86\u4e00\u6bb5 ajax \u4ee3\u7801\uff08\u65e0\u8bba\u662f\u4f7f\u7528 XMLHttpRequest \u8fd8\u662f fetch api\uff09\uff0c\u6d4f\u89c8\u5668\u4f1a\u9996\u5148\u5224\u65ad\u5b83\u5c5e\u4e8e\u54ea\u4e00\u79cd\u8bf7\u6c42\u6a21\u5f0f<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b80\u5355\u8bf7\u6c42\u7684\u5224\u5b9a<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u8bf7\u6c42<strong>\u540c\u65f6\u6ee1\u8db3<\/strong>\u4ee5\u4e0b\u6761\u4ef6\u65f6\uff0c\u6d4f\u89c8\u5668\u4f1a\u8ba4\u4e3a\u5b83\u662f\u4e00\u4e2a\u7b80\u5355\u8bf7\u6c42\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8bf7\u6c42\u65b9\u6cd5\u5c5e\u4e8e\u4e0b\u9762\u7684\u4e00\u79cd\uff1a<\/strong>\n<ul class=\"wp-block-list\">\n<li>get<\/li>\n\n\n\n<li>post<\/li>\n\n\n\n<li>head<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8bf7\u6c42\u5934\u4ec5\u5305\u542b\u5b89\u5168\u7684\u5b57\u6bb5\uff0c\u5e38\u89c1\u7684\u5b89\u5168\u5b57\u6bb5\u5982\u4e0b\uff1a<\/strong>\n<ul class=\"wp-block-list\">\n<li><code>Accept<\/code><\/li>\n\n\n\n<li><code>Accept-Language<\/code><\/li>\n\n\n\n<li><code>Content-Language<\/code><\/li>\n\n\n\n<li><code>Content-Type<\/code><\/li>\n\n\n\n<li><code>DPR<\/code><\/li>\n\n\n\n<li><code>Downlink<\/code><\/li>\n\n\n\n<li><code>Save-Data<\/code><\/li>\n\n\n\n<li><code>Viewport-Width<\/code><\/li>\n\n\n\n<li><code>Width<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8bf7\u6c42\u5934\u5982\u679c\u5305\u542b<code>Content-Type<\/code>\uff0c\u4ec5\u9650\u4e0b\u9762\u7684\u503c\u4e4b\u4e00\uff1a<\/strong>\n<ul class=\"wp-block-list\">\n<li><code>text\/plain<\/code><\/li>\n\n\n\n<li><code>multipart\/form-data<\/code><\/li>\n\n\n\n<li><code>application\/x-www-form-urlencoded<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4ee5\u4e0a\u4e09\u4e2a\u6761\u4ef6\u540c\u65f6\u6ee1\u8db3\uff0c\u6d4f\u89c8\u5668\u5224\u5b9a\u4e3a\u7b80\u5355\u8bf7\u6c42\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f\u4e00\u4e9b\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u7b80\u5355\u8bf7\u6c42\nfetch('http:\/\/crossdomain.com\/api\/news');\n\n\/\/ \u8bf7\u6c42\u65b9\u6cd5\u4e0d\u6ee1\u8db3\u8981\u6c42\uff0c\u4e0d\u662f\u7b80\u5355\u8bf7\u6c42\nfetch('http:\/\/crossdomain.com\/api\/news', {\n  method: 'PUT',\n});\n\n\/\/ \u52a0\u5165\u4e86\u989d\u5916\u7684\u8bf7\u6c42\u5934\uff0c\u4e0d\u662f\u7b80\u5355\u8bf7\u6c42\nfetch('http:\/\/crossdomain.com\/api\/news', {\n  headers: {\n    a: 1,\n  },\n});\n\n\/\/ \u7b80\u5355\u8bf7\u6c42\nfetch('http:\/\/crossdomain.com\/api\/news', {\n  method: 'post',\n});\n\n\/\/ content-type\u4e0d\u6ee1\u8db3\u8981\u6c42\uff0c\u4e0d\u662f\u7b80\u5355\u8bf7\u6c42\nfetch('http:\/\/crossdomain.com\/api\/news', {\n  method: 'post',\n  headers: {\n    'content-type': 'application\/json',\n  },\n});<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u7b80\u5355\u8bf7\u6c42\u7684\u4ea4\u4e92\u89c4\u8303<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u6d4f\u89c8\u5668\u5224\u5b9a\u67d0\u4e2a<strong>ajax \u8de8\u57df\u8bf7\u6c42<\/strong>\u662f<strong>\u7b80\u5355\u8bf7\u6c42<\/strong>\u65f6\uff0c\u4f1a\u53d1\u751f\u4ee5\u4e0b\u7684\u4e8b\u60c5<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8bf7\u6c42\u5934\u4e2d\u4f1a\u81ea\u52a8\u6dfb\u52a0<code>Origin<\/code>\u5b57\u6bb5<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\uff0c\u5728\u9875\u9762<code>http:\/\/my.com\/index.html<\/code>\u4e2d\u6709\u4ee5\u4e0b\u4ee3\u7801\u9020\u6210\u4e86\u8de8\u57df<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u7b80\u5355\u8bf7\u6c42\nfetch('http:\/\/crossdomain.com\/api\/news');<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bf7\u6c42\u53d1\u51fa\u540e\uff0c\u8bf7\u6c42\u5934\u4f1a\u662f\u4e0b\u9762\u7684\u683c\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GET \/api\/news\/ HTTP\/1.1\nHost: crossdomain.com\nConnection: keep-alive\n...\nReferer: http:\/\/my.com\/index.html\nOrigin: http:\/\/my.com<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u770b\u5230\u6700\u540e\u4e00\u884c\u6ca1\uff0c<code>Origin<\/code>\u5b57\u6bb5\u4f1a\u544a\u8bc9\u670d\u52a1\u5668\uff0c\u662f\u54ea\u4e2a\u6e90\u5730\u5740\u5728\u8de8\u57df\u8bf7\u6c42<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u670d\u52a1\u5668\u54cd\u5e94\u5934\u4e2d\u5e94\u5305\u542b<code>Access-Control-Allow-Origin<\/code><\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u670d\u52a1\u5668\u6536\u5230\u8bf7\u6c42\u540e\uff0c\u5982\u679c\u5141\u8bb8\u8be5\u8bf7\u6c42\u8de8\u57df\u8bbf\u95ee\uff0c\u9700\u8981\u5728\u54cd\u5e94\u5934\u4e2d\u6dfb\u52a0<code>Access-Control-Allow-Origin<\/code>\u5b57\u6bb5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u5b57\u6bb5\u7684\u503c\u53ef\u4ee5\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>*\uff1a\u8868\u793a\u6211\u5f88\u5f00\u653e\uff0c\u4ec0\u4e48\u4eba\u6211\u90fd\u5141\u8bb8\u8bbf\u95ee<\/li>\n\n\n\n<li>\u5177\u4f53\u7684\u6e90\uff1a\u6bd4\u5982<code>http:\/\/my.com<\/code>\uff0c\u8868\u793a\u6211\u5c31\u5141\u8bb8\u4f60\u8bbf\u95ee<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u9645\u4e0a\uff0c\u8fd9\u4e24\u4e2a\u503c\u5bf9\u4e8e\u5ba2\u6237\u7aef<code>http:\/\/my.com<\/code>\u800c\u8a00\uff0c\u90fd\u4e00\u6837\uff0c\u56e0\u4e3a\u5ba2\u6237\u7aef\u624d\u4e0d\u4f1a\u7ba1\u5176\u4ed6\u6e90\u670d\u52a1\u5668\u5141\u4e0d\u5141\u8bb8\uff0c\u5c31\u5173\u5fc3\u81ea\u5df1\u662f\u5426\u88ab\u5141\u8bb8<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7136\uff0c\u670d\u52a1\u5668\u4e5f\u53ef\u4ee5\u7ef4\u62a4\u4e00\u4e2a\u53ef\u88ab\u5141\u8bb8\u7684\u6e90\u5217\u8868\uff0c\u5982\u679c\u8bf7\u6c42\u7684<code>Origin<\/code>\u547d\u4e2d\u8be5\u5217\u8868\uff0c\u624d\u54cd\u5e94<code>*<\/code>\u6216\u5177\u4f53\u7684\u6e90<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8bbe\u670d\u52a1\u5668\u505a\u51fa\u4e86\u4ee5\u4e0b\u7684\u54cd\u5e94\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>HTTP\/1.1 200 OK\nDate: Tue, 21 Apr 2020 08:03:35 GMT\n...\nAccess-Control-Allow-Origin: http:\/\/my.com\n...\n\n\u6d88\u606f\u4f53\u4e2d\u7684\u6570\u636e<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u6d4f\u89c8\u5668\u770b\u5230\u670d\u52a1\u5668\u5141\u8bb8\u81ea\u5df1\u8bbf\u95ee\u540e\uff0c\u5b83\u5c31\u628a\u54cd\u5e94\u987a\u5229\u7684\u4ea4\u7ed9 js\uff0c\u4ee5\u5b8c\u6210\u540e\u7eed\u7684\u64cd\u4f5c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u56fe\u7b80\u8ff0\u4e86\u6574\u4e2a\u4ea4\u4e92\u8fc7\u7a0b<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"795\" height=\"265\" src=\"https:\/\/mitongxue.cn\/wp-content\/uploads\/2026\/06\/image-15.png\" alt=\"\" class=\"wp-image-139\" srcset=\"https:\/\/mitongxue.cn\/wp-content\/uploads\/2026\/06\/image-15.png 795w, https:\/\/mitongxue.cn\/wp-content\/uploads\/2026\/06\/image-15-300x100.png 300w, https:\/\/mitongxue.cn\/wp-content\/uploads\/2026\/06\/image-15-768x256.png 768w\" sizes=\"auto, (max-width: 795px) 100vw, 795px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">\u9700\u8981\u9884\u68c0\u7684\u8bf7\u6c42<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b80\u5355\u7684\u8bf7\u6c42\u5bf9\u670d\u52a1\u5668\u7684\u5a01\u80c1\u4e0d\u5927\uff0c\u6240\u4ee5\u5141\u8bb8\u4f7f\u7528\u4e0a\u8ff0\u7684\u7b80\u5355\u4ea4\u4e92\u5373\u53ef\u5b8c\u6210\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\uff0c\u5982\u679c\u6d4f\u89c8\u5668\u4e0d\u8ba4\u4e3a\u8fd9\u662f\u4e00\u79cd\u7b80\u5355\u8bf7\u6c42\uff0c\u5c31\u4f1a\u6309\u7167\u4e0b\u9762\u7684\u6d41\u7a0b\u8fdb\u884c\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6d4f\u89c8\u5668\u53d1\u9001\u9884\u68c0\u8bf7\u6c42\uff0c\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u5141\u8bb8<\/strong><\/li>\n\n\n\n<li><strong>\u670d\u52a1\u5668\u5141\u8bb8<\/strong><\/li>\n\n\n\n<li><strong>\u6d4f\u89c8\u5668\u53d1\u9001\u771f\u5b9e\u8bf7\u6c42<\/strong><\/li>\n\n\n\n<li><strong>\u670d\u52a1\u5668\u5b8c\u6210\u771f\u5b9e\u7684\u54cd\u5e94<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\uff0c\u5728\u9875\u9762<code>http:\/\/my.com\/index.html<\/code>\u4e2d\u6709\u4ee5\u4e0b\u4ee3\u7801\u9020\u6210\u4e86\u8de8\u57df<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u9700\u8981\u9884\u68c0\u7684\u8bf7\u6c42\nfetch('http:\/\/crossdomain.com\/api\/user', {\n  method: 'POST', \/\/ post \u8bf7\u6c42\n  headers: {\n    \/\/ \u8bbe\u7f6e\u8bf7\u6c42\u5934\n    a: 1,\n    b: 2,\n    'content-type': 'application\/json',\n  },\n  body: JSON.stringify({ name: '\u8881\u5c0f\u8fdb', age: 18 }), \/\/ \u8bbe\u7f6e\u8bf7\u6c42\u4f53\n});<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d4f\u89c8\u5668\u53d1\u73b0\u5b83\u4e0d\u662f\u4e00\u4e2a\u7b80\u5355\u8bf7\u6c42\uff0c\u5219\u4f1a\u6309\u7167\u4e0b\u9762\u7684\u6d41\u7a0b\u4e0e\u670d\u52a1\u5668\u4ea4\u4e92<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6d4f\u89c8\u5668\u53d1\u9001\u9884\u68c0\u8bf7\u6c42\uff0c\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u5141\u8bb8<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>OPTIONS \/api\/user HTTP\/1.1\nHost: crossdomain.com\n...\nOrigin: http:\/\/my.com\nAccess-Control-Request-Method: POST\nAccess-Control-Request-Headers: a, b, content-type<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u770b\u51fa\uff0c\u8fd9\u5e76\u975e\u6211\u4eec\u60f3\u8981\u53d1\u51fa\u7684\u771f\u5b9e\u8bf7\u6c42\uff0c\u8bf7\u6c42\u4e2d\u4e0d\u5305\u542b\u6211\u4eec\u7684\u8bf7\u6c42\u5934\uff0c\u4e5f\u6ca1\u6709\u6d88\u606f\u4f53\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u4e00\u4e2a\u9884\u68c0\u8bf7\u6c42\uff0c\u5b83\u7684\u76ee\u7684\u662f\u8be2\u95ee\u670d\u52a1\u5668\uff0c\u662f\u5426\u5141\u8bb8\u540e\u7eed\u7684\u771f\u5b9e\u8bf7\u6c42\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9884\u68c0\u8bf7\u6c42<strong>\u6ca1\u6709\u8bf7\u6c42\u4f53<\/strong>\uff0c\u5b83\u5305\u542b\u4e86\u540e\u7eed\u771f\u5b9e\u8bf7\u6c42\u8981\u505a\u7684\u4e8b\u60c5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9884\u68c0\u8bf7\u6c42\u6709\u4ee5\u4e0b\u7279\u5f81\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8bf7\u6c42\u65b9\u6cd5\u4e3a<code>OPTIONS<\/code><\/li>\n\n\n\n<li>\u6ca1\u6709\u8bf7\u6c42\u4f53<\/li>\n\n\n\n<li>\u8bf7\u6c42\u5934\u4e2d\u5305\u542b\n<ul class=\"wp-block-list\">\n<li><code>Origin<\/code>\uff1a\u8bf7\u6c42\u7684\u6e90\uff0c\u548c\u7b80\u5355\u8bf7\u6c42\u7684\u542b\u4e49\u4e00\u81f4<\/li>\n\n\n\n<li><code>Access-Control-Request-Method<\/code>\uff1a\u540e\u7eed\u7684\u771f\u5b9e\u8bf7\u6c42\u5c06\u4f7f\u7528\u7684\u8bf7\u6c42\u65b9\u6cd5<\/li>\n\n\n\n<li><code>Access-Control-Request-Headers<\/code>\uff1a\u540e\u7eed\u7684\u771f\u5b9e\u8bf7\u6c42\u4f1a\u6539\u52a8\u7684\u8bf7\u6c42\u5934<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u670d\u52a1\u5668\u5141\u8bb8<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u670d\u52a1\u5668\u6536\u5230\u9884\u68c0\u8bf7\u6c42\u540e\uff0c\u53ef\u4ee5\u68c0\u67e5\u9884\u68c0\u8bf7\u6c42\u4e2d\u5305\u542b\u7684\u4fe1\u606f\uff0c\u5982\u679c\u5141\u8bb8\u8fd9\u6837\u7684\u8bf7\u6c42\uff0c\u9700\u8981\u54cd\u5e94\u4e0b\u9762\u7684\u6d88\u606f\u683c\u5f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>HTTP\/1.1 200 OK\nDate: Tue, 21 Apr 2020 08:03:35 GMT\n...\nAccess-Control-Allow-Origin: http:\/\/my.com\nAccess-Control-Allow-Methods: POST\nAccess-Control-Allow-Headers: a, b, content-type\nAccess-Control-Max-Age: 86400\n...\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u9884\u68c0\u8bf7\u6c42\uff0c\u4e0d\u9700\u8981\u54cd\u5e94\u4efb\u4f55\u7684\u6d88\u606f\u4f53\uff0c\u53ea\u9700\u8981\u5728\u54cd\u5e94\u5934\u4e2d\u6dfb\u52a0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>Access-Control-Allow-Origin<\/code>\uff1a\u548c\u7b80\u5355\u8bf7\u6c42\u4e00\u6837\uff0c\u8868\u793a\u5141\u8bb8\u7684\u6e90<\/li>\n\n\n\n<li><code>Access-Control-Allow-Methods<\/code>\uff1a\u8868\u793a\u5141\u8bb8\u7684\u540e\u7eed\u771f\u5b9e\u7684\u8bf7\u6c42\u65b9\u6cd5<\/li>\n\n\n\n<li><code>Access-Control-Allow-Headers<\/code>\uff1a\u8868\u793a\u5141\u8bb8\u6539\u52a8\u7684\u8bf7\u6c42\u5934<\/li>\n\n\n\n<li><code>Access-Control-Max-Age<\/code>\uff1a\u544a\u8bc9\u6d4f\u89c8\u5668\uff0c\u591a\u5c11\u79d2\u5185\uff0c\u5bf9\u4e8e\u540c\u6837\u7684\u8bf7\u6c42\u6e90\u3001\u65b9\u6cd5\u3001\u5934\uff0c\u90fd\u4e0d\u9700\u8981\u518d\u53d1\u9001\u9884\u68c0\u8bf7\u6c42\u4e86<\/li>\n<\/ul>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u6d4f\u89c8\u5668\u53d1\u9001\u771f\u5b9e\u8bf7\u6c42<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u9884\u68c0\u88ab\u670d\u52a1\u5668\u5141\u8bb8\u540e\uff0c\u6d4f\u89c8\u5668\u5c31\u4f1a\u53d1\u9001\u771f\u5b9e\u8bf7\u6c42\u4e86\uff0c\u4e0a\u9762\u7684\u4ee3\u7801\u4f1a\u53d1\u751f\u4e0b\u9762\u7684\u8bf7\u6c42\u6570\u636e<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>POST \/api\/user HTTP\/1.1\nHost: crossdomain.com\nConnection: keep-alive\n...\nReferer: http:\/\/my.com\/index.html\nOrigin: http:\/\/my.com\n\n{\"name\": \"\u8881\u5c0f\u8fdb\", \"age\": 18 }<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ul class=\"wp-block-list\"><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u670d\u52a1\u5668\u54cd\u5e94\u771f\u5b9e\u8bf7\u6c42<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>HTTP\/1.1 200 OK\nDate: Tue, 21 Apr 2020 08:03:35 GMT\n...\nAccess-Control-Allow-Origin: http:\/\/my.com\n...\n\n\u6dfb\u52a0\u7528\u6237\u6210\u529f<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u5b8c\u6210\u9884\u68c0\u4e4b\u540e\uff0c\u540e\u7eed\u7684\u5904\u7406\u4e0e\u7b80\u5355\u8bf7\u6c42\u76f8\u540c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u56fe\u7b80\u8ff0\u4e86\u6574\u4e2a\u4ea4\u4e92\u8fc7\u7a0b<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"859\" height=\"595\" src=\"https:\/\/mitongxue.cn\/wp-content\/uploads\/2026\/06\/image-16.png\" alt=\"\" class=\"wp-image-140\" srcset=\"https:\/\/mitongxue.cn\/wp-content\/uploads\/2026\/06\/image-16.png 859w, https:\/\/mitongxue.cn\/wp-content\/uploads\/2026\/06\/image-16-300x208.png 300w, https:\/\/mitongxue.cn\/wp-content\/uploads\/2026\/06\/image-16-768x532.png 768w\" sizes=\"auto, (max-width: 859px) 100vw, 859px\" \/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">\u9644\u5e26\u8eab\u4efd\u51ed\u8bc1\u7684\u8bf7\u6c42<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cajax \u7684\u8de8\u57df\u8bf7\u6c42\u5e76\u4e0d\u4f1a\u9644\u5e26 cookie\uff0c\u8fd9\u6837\u4e00\u6765\uff0c\u67d0\u4e9b\u9700\u8981\u6743\u9650\u7684\u64cd\u4f5c\u5c31\u65e0\u6cd5\u8fdb\u884c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u8fc7\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u914d\u7f6e\u5c31\u53ef\u4ee5\u5b9e\u73b0\u9644\u5e26 cookie<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ xhr\nvar xhr = new XMLHttpRequest();\nxhr.withCredentials = true;\n\n\/\/ fetch api\nfetch(url, {\n  credentials: 'include',\n});<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u4e00\u6765\uff0c\u8be5\u8de8\u57df\u7684 ajax \u8bf7\u6c42\u5c31\u662f\u4e00\u4e2a<em>\u9644\u5e26\u8eab\u4efd\u51ed\u8bc1\u7684\u8bf7\u6c42<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4e00\u4e2a\u8bf7\u6c42\u9700\u8981\u9644\u5e26 cookie \u65f6\uff0c\u65e0\u8bba\u5b83\u662f\u7b80\u5355\u8bf7\u6c42\uff0c\u8fd8\u662f\u9884\u68c0\u8bf7\u6c42\uff0c\u90fd\u4f1a\u5728\u8bf7\u6c42\u5934\u4e2d\u6dfb\u52a0<code>cookie<\/code>\u5b57\u6bb5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u670d\u52a1\u5668\u54cd\u5e94\u65f6\uff0c\u9700\u8981\u660e\u786e\u544a\u77e5\u5ba2\u6237\u7aef\uff1a\u670d\u52a1\u5668\u5141\u8bb8\u8fd9\u6837\u7684\u51ed\u636e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u544a\u77e5\u7684\u65b9\u5f0f\u4e5f\u975e\u5e38\u7684\u7b80\u5355\uff0c\u53ea\u9700\u8981\u5728\u54cd\u5e94\u5934\u4e2d\u6dfb\u52a0\uff1a<code>Access-Control-Allow-Credentials: true<\/code>\u5373\u53ef<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u4e00\u4e2a\u9644\u5e26\u8eab\u4efd\u51ed\u8bc1\u7684\u8bf7\u6c42\uff0c\u82e5\u670d\u52a1\u5668\u6ca1\u6709\u660e\u786e\u544a\u77e5\uff0c\u6d4f\u89c8\u5668\u4ecd\u7136\u89c6\u4e3a\u8de8\u57df\u88ab\u62d2\u7edd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e6\u5916\u8981\u7279\u522b\u6ce8\u610f\u7684\u662f\uff1a<strong>\u5bf9\u4e8e\u9644\u5e26\u8eab\u4efd\u51ed\u8bc1\u7684\u8bf7\u6c42\uff0c\u670d\u52a1\u5668\u4e0d\u5f97\u8bbe\u7f6e <code>Access-Control-Allow-Origin \u7684\u503c\u4e3a*<\/code><\/strong>\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u4e0d\u63a8\u8350\u4f7f\u7528*\u7684\u539f\u56e0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8de8\u57df\u8bbf\u95ee\u65f6\uff0cJS \u53ea\u80fd\u62ff\u5230\u4e00\u4e9b\u6700\u57fa\u672c\u7684\u54cd\u5e94\u5934\uff0c\u5982\uff1aCache-Control\u3001Content-Language\u3001Content-Type\u3001Expires\u3001Last-Modified\u3001Pragma\uff0c\u5982\u679c\u8981\u8bbf\u95ee\u5176\u4ed6\u5934\uff0c\u5219\u9700\u8981\u670d\u52a1\u5668\u8bbe\u7f6e\u672c\u54cd\u5e94\u5934\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>Access-Control-Expose-Headers<\/code>\u5934\u8ba9\u670d\u52a1\u5668\u628a\u5141\u8bb8\u6d4f\u89c8\u5668\u8bbf\u95ee\u7684\u5934\u653e\u5165\u767d\u540d\u5355\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Access-Control-Expose-Headers: authorization, a, b<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837 JS \u5c31\u80fd\u591f\u8bbf\u95ee\u6307\u5b9a\u7684\u54cd\u5e94\u5934\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>CORS\u662f\u57fa\u4e8ehttp1.1\u7684\u4e00\u79cd\u8de8\u57df\u89e3\u51b3\u65b9\u6848\uff0c\u5b83..<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-138","post","type-post","status-publish","format-standard","hentry","category-front"],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":""},"author_info":{"info":["\u9648 \u67d0\u4eba"]},"category_info":"<a href=\"https:\/\/mitongxue.cn\/index.php\/category\/front\/\" rel=\"category tag\">\u524d\u7aef<\/a>","tag_info":"\u524d\u7aef","comment_count":"0","_links":{"self":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/comments?post=138"}],"version-history":[{"count":1,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/138\/revisions"}],"predecessor-version":[{"id":141,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/138\/revisions\/141"}],"wp:attachment":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/media?parent=138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/categories?post=138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/tags?post=138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}