{"id":8946,"date":"2023-09-13T01:43:09","date_gmt":"2023-09-12T17:43:09","guid":{"rendered":"\/?p=8946"},"modified":"2023-09-13T01:43:09","modified_gmt":"2023-09-12T17:43:09","slug":"websocket%e7%ae%80%e4%bb%8b","status":"publish","type":"post","link":"\/?p=8946","title":{"rendered":"websocket\u7b80\u4ecb"},"content":{"rendered":"<h2>1.WebScoket\u7b80\u4ecb<\/h2>\n<p>WebSocket \u662f HTML5 \u5f00\u59cb\u63d0\u4f9b\u7684\u4e00\u79cd\u5728\u5355\u4e2a TCP \u8fde\u63a5\u4e0a\u8fdb\u884c\u5168\u53cc\u5de5\u901a\u8baf\u7684\u534f\u8bae\u3002 <\/p>\n<p>WebSocket \u4f7f\u5f97\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u6570\u636e\u4ea4\u6362\u53d8\u5f97\u66f4\u52a0\u7b80\u5355\uff0c\u5141\u8bb8\u670d\u52a1\u7aef\u4e3b\u52a8\u5411\u5ba2\u6237\u7aef\u63a8\u9001\u6570\u636e\u3002\u5728 WebSocket API \u4e2d\uff0c\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u53ea\u9700\u8981\u5b8c\u6210\u4e00\u6b21\u63e1\u624b\uff0c\u4e24\u8005\u4e4b\u95f4\u5c31\u76f4\u63a5\u53ef\u4ee5\u521b\u5efa\u6301\u4e45\u6027\u7684\u8fde\u63a5\uff0c\u5e76\u8fdb\u884c\u53cc\u5411\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<p>\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u53ea\u9700\u8981\u5b8c\u6210\u4e00\u6b21\u63e1\u624b\uff0c\u4e24\u8005\u4e4b\u95f4\u5c31\u53ef\u4ee5\u5efa\u7acb\u6301\u4e45\u6027\u7684\u8fde\u63a5\uff0c\u5e76\u8fdb\u884c\u53cc\u5411\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<h2>2.\u4e0eHTTP\u6709\u4ec0\u4e48\u533a\u522b<\/h2>\n<p>HTTP\u534f\u8bae\u53ea\u80fd\u5b9e\u73b0\u5ba2\u6237\u7aef\u8bf7\u6c42\uff0c\u670d\u52a1\u7aef\u54cd\u5e94\u7684\u8fd9\u79cd\u5355\u9879\u901a\u4fe1\u3002<\/p>\n<p>\u800cWebSocket\u53ef\u4ee5\u5b9e\u73b0\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u7684\u53cc\u5411\u901a\u8baf\u3002<\/p>\n<p>\u6700\u5927\u7684\u533a\u522b\u5c31\u662f\u53ef\u4ee5\u505a\u5230\u670d\u52a1\u7aef\u4e3b\u52a8\u5c06\u6d88\u606f\u63a8\u9001\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n<p>\u603b\u800c\u8a00\u4e4b\uff1aHTML5 \u5b9a\u4e49\u7684 WebSocket \u534f\u8bae\uff0c\u80fd\u66f4\u597d\u7684\u8282\u7701\u670d\u52a1\u5668\u8d44\u6e90\u548c\u5e26\u5bbd\uff0c\u5e76\u4e14\u80fd\u591f\u66f4\u5b9e\u65f6\u5730\u8fdb\u884c\u901a\u8baf\u3002<\/p>\n<p><strong>\u90a3\u4e48\u4e3a\u4ec0\u4e48\u8981\u8bbe\u8ba1WebScoket\u5462\uff1f<\/strong><\/p>\n<p>\u4e5f\u6b63\u662fHTTP \u534f\u8bae\u65e0\u6cd5\u5b9e\u73b0\u670d\u52a1\u5668\u4e3b\u52a8\u5411\u5ba2\u6237\u7aef\u53d1\u8d77\u6d88\u606f\uff0c\u5c3d\u7ba1\u91c7\u7528\u8f6e\u8bad\u8c03\u7528\u7684\u65b9\u5f0f\uff0c\u6548\u7387\u4f4e\u3001\u8d44\u6e90\u6d88\u8017\u5927\u3002 WebSocket \u8fde\u63a5\u5141\u8bb8\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u8fdb\u884c\u5168\u53cc\u5de5\u901a\u4fe1\uff0c\u4ee5\u4fbf\u4efb\u4e00\u65b9\u90fd\u53ef\u4ee5\u901a\u8fc7\u5efa\u7acb\u7684\u8fde\u63a5\u5c06\u6570\u636e\u63a8\u9001\u5230\u53e6\u4e00\u7aef\u3002WebSocket \u53ea\u9700\u8981\u5efa\u7acb\u4e00\u6b21\u8fde\u63a5\uff0c\u5c31\u53ef\u4ee5\u4e00\u76f4\u4fdd\u6301\u8fde\u63a5\u72b6\u6001\u3002\u8fd9\u76f8\u6bd4\u4e8e\u8f6e\u8be2\u65b9\u5f0f\u7684\u4e0d\u505c\u5efa\u7acb\u8fde\u63a5\u663e\u7136\u6548\u7387\u8981\u5927\u5927\u63d0\u9ad8\u3002<\/p>\n<p><strong>WebScoket\u7684\u4f18\u52bf\u7279\u70b9<\/strong><\/p>\n<p><img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/image-20230912101247736.png\" alt=\"image-20230912101247736\" \/><\/p>\n<ul>\n<li>\u63e1\u624b\u9636\u6bb5\u91c7\u7528 HTTP \u534f\u8bae\u3002<\/li>\n<li>\u6570\u636e\u683c\u5f0f\u8f7b\u91cf\uff0c\u6027\u80fd\u5f00\u9500\u5c0f\u3002\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u65f6\uff0c\u670d\u52a1\u7aef\u5230\u5ba2\u6237\u7aef\u7684\u6570\u636e\u5305\u5934\u53ea\u67092\u523010\u5b57\u8282\uff0c\u5ba2\u6237\u7aef\u5230\u670d\u52a1\u7aef\u9700\u8981\u52a0\u4e0a\u53e6\u59164\u5b57\u8282\u7684\u63a9\u7801\u3002HTTP\u6bcf\u6b21\u90fd\u9700\u8981\u643a\u5e26\u5b8c\u6574\u5934\u90e8\u3002<\/li>\n<li>\u66f4\u597d\u7684\u4e8c\u8fdb\u5236\u652f\u6301\uff0c\u53ef\u4ee5\u53d1\u9001\u6587\u672c\uff0c\u548c\u4e8c\u8fdb\u5236\u6570\u636e<\/li>\n<li>\u6ca1\u6709\u540c\u6e90\u9650\u5236\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u4e0e\u4efb\u610f\u670d\u52a1\u5668\u901a\u4fe1<\/li>\n<li>\u534f\u8bae\u6807\u8bc6\u7b26\u662fws\u6216wss\uff0c\u8bf7\u6c42\u7684\u5730\u5740\u5c31\u662f\u540e\u7aef\u652f\u6301WebSocket\u7684API\u3002<\/li>\n<li>\u6ca1\u6709\u540c\u6e90\u9650\u5236\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u4e0e\u4efb\u610f\u670d\u52a1\u5668\u901a\u4fe1<\/li>\n<li>\u534f\u8bae\u6807\u8bc6\u7b26\u662fws\u6216wss\uff0c\u8bf7\u6c42\u7684\u5730\u5740\u5c31\u662f\u540e\u7aef\u652f\u6301WebSocket\u7684API\u3002<\/li>\n<\/ul>\n<h2>3.websocket\u5e95\u5c42\u5b9e\u73b0\u539f\u7406<\/h2>\n<h3>\u5efa\u7acb\u63e1\u624b-\u5ba2\u6237\u7aef<\/h3>\n<p><img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/image-20230912102229076.png\" alt=\"image-20230912102229076\" \/><\/p>\n<ul>\n<li><strong>Origin<\/strong>\uff1a\u6240\u6709\u6d4f\u89c8\u5668\u5c06\u4f1a\u53d1\u9001\u4e00\u4e2a Origin\u8bf7\u6c42\u5934\u3002 \u4f60\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u8bf7\u6c42\u5934\u7528\u4e8e\u5b89\u5168\u65b9\u9762\uff08\u68c0\u67e5\u662f\u5426\u662f\u540c\u4e00\u4e2a\u57df\uff0c\u767d\u540d\u5355\/ \u9ed1\u540d\u5355\u7b49\uff09\uff0c\u5982\u679c\u4f60\u4e0d\u559c\u6b22\u8fd9\u4e2a\u8bf7\u6c42\u53d1\u8d77\u6e90\uff0c\u4f60\u53ef\u4ee5\u53d1\u9001\u4e00\u4e2a403 Forbidden\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\u975e\u6d4f\u89c8\u5668\u53ea\u80fd\u53d1\u9001\u4e00\u4e2a\u6a21\u62df\u7684 Origin\u3002\u5927\u591a\u6570\u5e94\u7528\u4f1a\u62d2\u7edd\u4e0d\u542b\u8fd9\u4e2a\u8bf7\u6c42\u5934\u7684\u8bf7\u6c42\u3002<\/li>\n<li><strong>Sec-WebSocket-Key<\/strong>\uff1a\u662f\u4e00\u4e2a Base64 encode \u7684\u503c\uff0c\u8fd9\u4e2a\u662f\u6d4f\u89c8\u5668\u968f\u673a\u751f\u6210\u7684\uff0c\u544a\u8bc9\u670d\u52a1\u5668\uff1a\u9a8c\u8bc1\u662f\u4e0d\u662f\u771f\u7684\u662fWebsocket\u52a9\u7406<\/li>\n<li><strong>Sec_WebSocket-Protocol<\/strong>\uff1a\u662f\u4e00\u4e2a\u7528\u6237\u5b9a\u4e49\u7684\u5b57\u7b26\u4e32\uff0c\u7528\u6765\u533a\u5206\u540cURL\u4e0b\uff0c\u4e0d\u540c\u7684\u670d\u52a1\u6240\u9700\u8981\u7684\u534f\u8bae\u3002<\/li>\n<li><strong>Sec-WebSocket-Version<\/strong>\uff1a \u662f\u544a\u8bc9\u670d\u52a1\u5668\u6240\u4f7f\u7528\u7684 Websocket Draft\uff08\u534f\u8bae\u7248\u672c\uff09<\/li>\n<\/ul>\n<h3>\u5efa\u7acb\u63e1\u624b-\u670d\u52a1\u7aef<\/h3>\n<p><img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/image-20230912102246657.png\" alt=\"image-20230912102246657\" \/><\/p>\n<ul>\n<li><strong>Sec-WebSocket-Key<\/strong>\uff1a\u5b83\u901a\u8fc7\u5ba2\u6237\u7aef\u53d1\u9001\u7684Sec-WebSocket-Key \u8ba1\u7b97\u51fa\u6765\u3002\u8ba1\u7b97\u65b9\u6cd5\uff1a\n<ul>\n<li>\u5c06 Sec-WebSocket-Key \u8ddf 258EAFA5-E914-47DA-95CA-C5AB0DC85B11 \u62fc\u63a5\uff1b<\/li>\n<li>\u901a\u8fc7 SHA1 \u8ba1\u7b97\u51fa\u6458\u8981\uff0c\u5e76\u8f6c\u6210 base64 \u5b57\u7b26\u4e32\u3002<br \/>\nSec-WebSocket-Key \/ Sec-WebSocket-Accept \u7684\u4e3b\u8981\u4f5c\u7528\u8fd8\u662f\u4e3a\u4e86\u907f\u514d\u4e00\u4e9b\u7f51\u7edc\u901a\u4fe1\u8fc7\u7a0b\u4e2d\uff0c\u4e00\u4e9b\u975e\u671f\u5f85\u7684\u6570\u636e\u5305\uff0c\u201d\u4e71\u5165\u201c\u8fdb\u6765\uff0c\u5bfc\u81f4\u4e00\u4e9b\u9519\u8bef\u7684\u54cd\u5e94\uff0c\u5e76\u4e0d\u80fd\u7528\u4e8e\u5b9e\u73b0\u767b\u5f55\u8ba4\u8bc1\u548c\u6570\u636e\u5b89\u5168\uff0c\u8fd9\u4e9b\u529f\u80fd\u8fd8\u9700\u8981\u5e94\u7528\u5c42\u81ea\u5df1\u5b9e\u73b0\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u4f20\u8f93\u534f\u8bae<\/h3>\n<p>Websocket\u7684\u6570\u636e\u4f20\u9012\u91c7\u7528frame\u5f62\u5f0f\uff0c\u4f1a\u5c06\u4e00\u6761\u6d88\u606f\u5206\u4e3a\u51e0\u4e2aframe\uff0c\u6309\u7167\u5148\u540e\u987a\u5e8f\u4f20\u8f93\u51fa\u53bb\u3002\u8fd9\u6837\u505a\u4f1a\u6709\u51e0\u4e2a\u597d\u5904\uff1a<\/p>\n<ol>\n<li>\u5927\u6570\u636e\u7684\u4f20\u8f93\u53ef\u4ee5\u5206\u7247\u4f20\u8f93\uff0c\u53ef\u4ee5\u907f\u514d\u6570\u636e\u5927\u5c0f\u5bfc\u81f4\u7684\u957f\u5ea6\u6807\u5fd7\u4f4d\u4e0d\u8db3\u591f\u7684\u60c5\u51b5\u3002<\/li>\n<li>\u548chttp\u7684chunk\u4e00\u6837\uff0c\u53ef\u4ee5\u8fb9\u751f\u6210\u6570\u636e\u8fb9\u4f20\u9012\u6d88\u606f\uff0c\u5373\u63d0\u9ad8\u4f20\u8f93\u6548\u7387\u3002<\/li>\n<\/ol>\n<p><strong>frame<\/strong> \u662f\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u6570\u636e\u4f20\u8f93\u7684\u6700\u5c0f\u5355\u5143, \u5f53\u4e00\u6761\u6d88\u606f\u8fc7\u957f\u65f6, \u901a\u4fe1\u65b9\u53ef\u4ee5\u5c06\u8be5\u6d88\u606f\u62c6\u5206\u6210\u591a\u4e2a frame \u53d1\u9001, \u63a5\u6536\u65b9\u6536\u5230\u4ee5\u540e\u91cd\u65b0\u62fc\u63a5\u3001\u89e3\u7801\u4ece\u800c\u8fd8\u539f\u51fa\u5b8c\u6574\u7684\u6d88\u606f, \u5728 WebSocket \u4e2d, frame \u6709\u591a\u79cd\u7c7b\u578b, frame \u7684\u7c7b\u578b\u7531 frame \u5934\u90e8\u7684 Opcode \u5b57\u6bb5\u6307\u793a, WebSocket frame \u7684\u7ed3\u6784\u5982\u4e0b\u6240\u793a:<\/p>\n<p><img src=\"https:\/\/lemon-guess.oss-cn-hangzhou.aliyuncs.com\/img\/image-20230912102634288.png\" alt=\"image-20230912102634288\" \/><\/p>\n<p>\u8be5\u7ed3\u6784\u7684\u5b57\u6bb5\u8bed\u4e49\u5982\u4e0b:<\/p>\n<ul>\n<li>FIN, \u957f\u5ea6\u4e3a 1 \u6bd4\u7279, \u8be5\u6807\u5fd7\u4f4d\u7528\u4e8e\u6307\u793a\u5f53\u524d\u7684 frame \u662f\u6d88\u606f\u7684\u6700\u540e\u4e00\u4e2a\u5206\u6bb5, \u56e0\u4e3a WebSocket \u652f\u6301\u5c06\u957f\u6d88\u606f\u5207\u5206\u4e3a\u82e5\u5e72\u4e2a frame \u53d1\u9001, \u5207\u5206\u4ee5\u540e, \u9664\u4e86\u6700\u540e\u4e00\u4e2a frame, \u524d\u9762\u7684 frame \u7684 FIN \u5b57\u6bb5\u90fd\u4e3a 0, \u6700\u540e\u4e00\u4e2a frame \u7684 FIN \u5b57\u6bb5\u4e3a 1, \u5f53\u7136, \u82e5\u6d88\u606f\u6ca1\u6709\u5206\u6bb5, \u90a3\u4e48\u4e00\u4e2a frame \u4fbf\u5305\u542b\u4e86\u5b8c\u6210\u7684\u6d88\u606f, \u6b64\u65f6\u5176 FIN \u5b57\u6bb5\u503c\u4e3a 1\u3002<\/li>\n<li>RSV 1 ~ 3, \u8fd9\u4e09\u4e2a\u5b57\u6bb5\u4e3a\u4fdd\u7559\u5b57\u6bb5, \u53ea\u6709\u5728 WebSocket \u6269\u5c55\u65f6\u7528, \u82e5\u4e0d\u542f\u7528\u6269\u5c55, \u5219\u8be5\u4e09\u4e2a\u5b57\u6bb5\u5e94\u7f6e\u4e3a 1, \u82e5\u63a5\u6536\u65b9\u6536\u5230 RSV 1 ~ 3 \u4e0d\u5168\u4e3a 0 \u7684 frame, \u5e76\u4e14\u53cc\u65b9\u6ca1\u6709\u534f\u5546\u4f7f\u7528 WebSocket \u534f\u8bae\u6269\u5c55, \u5219\u63a5\u6536\u65b9\u5e94\u7acb\u5373\u7ec8\u6b62 WebSocket \u8fde\u63a5\u3002<\/li>\n<li>Opcode, \u957f\u5ea6\u4e3a 4 \u6bd4\u7279, \u8be5\u5b57\u6bb5\u5c06\u6307\u793a frame \u7684\u7c7b\u578b, <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc6455\">RFC 6455<\/a> \u5b9a\u4e49\u7684 Opcode \u5171\u6709\u5982\u4e0b\u51e0\u79cd:\n<ul>\n<li>0x0, \u4ee3\u8868\u5f53\u524d\u662f\u4e00\u4e2a continuation frame\uff0c\u65e2\u88ab\u5207\u5206\u7684\u957f\u6d88\u606f\u7684\u6bcf\u4e2a\u5206\u7247frame<\/li>\n<li>0x1, \u4ee3\u8868\u5f53\u524d\u662f\u4e00\u4e2a text frame<\/li>\n<li>0x2, \u4ee3\u8868\u5f53\u524d\u662f\u4e00\u4e2a binary frame<\/li>\n<li>0x3 ~ 7, \u76ee\u524d\u4fdd\u7559, \u4ee5\u540e\u5c06\u7528\u4f5c\u66f4\u591a\u7684\u975e\u63a7\u5236\u7c7b frame<\/li>\n<li>0x8, \u4ee3\u8868\u5f53\u524d\u662f\u4e00\u4e2a connection close, \u7528\u4e8e\u5173\u95ed WebSocket \u8fde\u63a5<\/li>\n<li>0x9, \u4ee3\u8868\u5f53\u524d\u662f\u4e00\u4e2a ping frame<\/li>\n<li>0xA, \u4ee3\u8868\u5f53\u524d\u662f\u4e00\u4e2a pong frame<\/li>\n<li>0xB ~ F, \u76ee\u524d\u4fdd\u7559, \u4ee5\u540e\u5c06\u7528\u4f5c\u66f4\u591a\u7684\u63a7\u5236\u7c7b frame<\/li>\n<\/ul>\n<\/li>\n<li>Mask, \u957f\u5ea6\u4e3a 1 \u6bd4\u7279, \u8be5\u5b57\u6bb5\u662f\u4e00\u4e2a\u6807\u5fd7\u4f4d, \u7528\u4e8e\u6307\u793a frame \u7684\u6570\u636e (Payload) \u662f\u5426\u4f7f\u7528\u63a9\u7801\u63a9\u76d6, <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc6455\">RFC 6455<\/a> \u89c4\u5b9a\u5f53\u4e14\u4ec5\u5f53\u7531\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u7aef\u53d1\u9001\u7684 frame, \u9700\u8981\u4f7f\u7528\u63a9\u7801\u8986\u76d6, \u63a9\u7801\u8986\u76d6\u4e3b\u8981\u4e3a\u4e86\u89e3\u51b3\u4ee3\u7406\u7f13\u5b58\u6c61\u67d3\u653b\u51fb (\u66f4\u591a\u7ec6\u8282\u89c1 <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc6455#section-10.3\">RFC 6455 Section 10.3<\/a>)\u3002<\/li>\n<li>Payload Len, \u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u6307\u793a frame Payload \u7684\u957f\u5ea6, \u8be5\u5b57\u6bb5\u7684\u957f\u5ea6\u53ef\u53d8, \u53ef\u80fd\u4e3a 7 \u6bd4\u7279, \u4e5f\u53ef\u80fd\u4e3a 7 + 16 \u6bd4\u7279, \u4e5f\u53ef\u80fd\u4e3a 7 + 64 \u6bd4\u7279. \u5177\u4f53\u6765\u8bf4, \u5f53 Payload \u7684\u5b9e\u9645\u957f\u5ea6\u5728 [0, 125] \u65f6, \u5219 Payload Len \u5b57\u6bb5\u7684\u957f\u5ea6\u4e3a 7 \u6bd4\u7279, \u5b83\u7684\u503c\u76f4\u63a5\u4ee3\u8868\u4e86 Payload \u7684\u5b9e\u9645\u957f\u5ea6; \u5f53 Payload \u7684\u5b9e\u9645\u957f\u5ea6\u4e3a 126 \u65f6, \u5219 Payload Len \u540e\u8ddf\u968f\u7684 16 \u4f4d\u5c06\u88ab\u89e3\u91ca\u4e3a 16-bit \u7684\u65e0\u7b26\u53f7\u6574\u6570, \u8be5\u6574\u6570\u7684\u503c\u6307\u793a Payload \u7684\u5b9e\u9645\u957f\u5ea6; \u5f53 Payload \u7684\u5b9e\u9645\u957f\u5ea6\u4e3a 127 \u65f6, \u5176\u540e\u7684 64 \u6bd4\u7279\u5c06\u88ab\u89e3\u91ca\u4e3a 64-bit \u7684\u65e0\u7b26\u53f7\u6574\u6570, \u8be5\u6574\u6570\u7684\u503c\u6307\u793a Payload \u7684\u5b9e\u9645\u957f\u5ea6\u3002<\/li>\n<li>Masking-key, \u8be5\u5b57\u6bb5\u4e3a\u53ef\u9009\u5b57\u6bb5, \u5f53 Mask \u6807\u5fd7\u4f4d\u4e3a 1 \u65f6, \u4ee3\u8868\u8fd9\u662f\u4e00\u4e2a\u63a9\u7801\u8986\u76d6\u7684 frame, \u6b64\u65f6 Masking-key \u5b57\u6bb5\u5b58\u5728, \u5176\u957f\u5ea6\u4e3a 32 \u4f4d, <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc6455\">RFC 6455<\/a> \u89c4\u5b9a\u6240\u6709\u7531\u5ba2\u6237\u7aef\u53d1\u5f80\u670d\u52a1\u7aef\u7684 frame \u90fd\u5fc5\u987b\u4f7f\u7528\u63a9\u7801\u8986\u76d6, \u5373\u5bf9\u4e8e\u6240\u6709\u7531\u5ba2\u6237\u7aef\u53d1\u5f80\u670d\u52a1\u7aef\u7684 frame, \u8be5\u5b57\u6bb5\u90fd\u5fc5\u987b\u5b58\u5728, \u8be5\u5b57\u6bb5\u7684\u503c\u662f\u7531\u5ba2\u6237\u7aef\u4f7f\u7528\u71b5\u503c\u8db3\u591f\u5927\u7684\u968f\u673a\u6570\u53d1\u751f\u5668\u751f\u6210, \u5173\u4e8e\u63a9\u7801\u8986\u76d6, \u5c06\u4e0b\u9762\u8ba8\u8bba, \u82e5 Mask \u6807\u8bc6\u4f4d 0, \u5219 frame \u4e2d\u5c06\u8bbe\u7f6e\u8be5\u5b57\u6bb5 (\u6ce8\u610f\u662f\u4e0d\u8bbe\u7f6e\u8be5\u5b57\u6bb5, \u800c\u4e0d\u4ec5\u4ec5\u662f\u4e0d\u7ed9\u8be5\u5b57\u6bb5\u8d4b\u503c)\u3002<\/li>\n<li>Payload, \u8be5\u5b57\u6bb5\u7684\u957f\u5ea6\u662f\u4efb\u610f\u7684, \u8be5\u5b57\u6bb5\u5373\u4e3a frame \u7684\u6570\u636e\u90e8\u5206, \u82e5\u901a\u4fe1\u53cc\u65b9\u534f\u5546\u4f7f\u7528\u4e86 WebSocket \u6269\u5c55, \u5219\u8be5\u6269\u5c55\u6570\u636e (Extension data) \u4e5f\u5c06\u5b58\u653e\u5728\u6b64\u5904, \u6269\u5c55\u6570\u636e + \u5e94\u7528\u6570\u636e, \u5b83\u4eec\u7684\u957f\u5ea6\u548c\u4fbf\u4e3a Payload Len \u5b57\u6bb5\u6307\u793a\u7684\u503c\u3002<\/li>\n<\/ul>\n<h2>4.Websocket\u5c5e\u6027<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u5c5e\u6027<\/th>\n<th><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Socket.readyState<\/td>\n<td>\u53ea\u8bfb\u5c5e\u6027 readyState \u8868\u793a\u8fde\u63a5\u72b6\u6001\uff0c\u53ef\u4ee5\u662f\u4ee5\u4e0b\u503c: \u00b7 \u8868\u793a\u8fde\u63a5\u5c1a\u672a\u5efa\u7acb\u30021\u8868\u793a\u8fde\u63a5\u5df2\u5efa\u7acb\uff0c\u53ef\u4ee5\u8fdb\u884c\u901a\u4fe1\u30022\u8868\u793a\u8fde\u63a5\u6b63\u5728\u8fdb\u884c\u5173\u95ed\u30023\u8868\u793a\u8fde\u63a5\u5df2\u7ecf\u5173\u95ed\u6216\u8005\u8fde\u63a5\u4e0d\u80fd\u6253\u5f00\u3002<\/td>\n<\/tr>\n<tr>\n<td>Socket.bufferedAmount<\/td>\n<td>\u53ea\u8bfb\u5c5e\u6027 bufferedAmount \u5df2\u88ab send() \u653e\u5165\u6b63\u5728\u961f\u5217\u4e2d\u7b49\u5f85\u4f20\u8f93\uff0c\u4f46\u662f\u8fd8\u6ca1\u6709\u53d1\u51fa\u7684 UTF-8 \u6587\u672c\u5b57\u8282\u6570<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>5.Websocket\u4e8b\u4ef6<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u4e8b\u4ef6<\/th>\n<th>\u4e8b\u4ef6\u5904\u7406\u987a\u5e8f<\/th>\n<th>\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>open<\/td>\n<td>Socket.onopen<\/td>\n<td>\u8fde\u63a5\u5efa\u7acb\u65f6\u89e6\u53d1<\/td>\n<\/tr>\n<tr>\n<td>message<\/td>\n<td>Socket.onmessage<\/td>\n<td>\u5ba2\u6237\u7aef\u63a5\u6536\u670d\u52a1\u7aef\u6570\u636e\u65f6\u89e6\u53d1<\/td>\n<\/tr>\n<tr>\n<td>error<\/td>\n<td>Socket.onerror<\/td>\n<td>\u901a\u4fe1\u53d1\u751f\u9519\u8bef\u65f6\u89e6\u53d1<\/td>\n<\/tr>\n<tr>\n<td>close<\/td>\n<td>Socket.onclose<\/td>\n<td>\u8fde\u63a5\u5173\u95ed\u65f6\u89e6\u53d1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>6.WebScoket\u7684\u65b9\u6cd5<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u65b9\u6cd5<\/th>\n<th>\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Socket.send()<\/td>\n<td>\u4f7f\u7528\u8fde\u63a5\u53d1\u9001\u6570\u636e<\/td>\n<\/tr>\n<tr>\n<td>Socket.close()<\/td>\n<td>\u5173\u95ed\u8fde\u63a5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>7.WebScoket\u7684\u4f7f\u7528\u65b9\u6cd5<\/h2>\n","protected":false},"excerpt":{"rendered":"<p>1.WebScoket\u7b80\u4ecb WebSocket \u662f HTML5 \u5f00\u59cb\u63d0\u4f9b\u7684\u4e00\u79cd\u5728\u5355\u4e2a TCP \u8fde\u63a5\u4e0a\u8fdb\u884c\u5168\u53cc\u5de5\u901a\u8baf\u7684\u534f\u8bae\u3002 WebSoc   \u2026 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[205],"tags":[206],"_links":{"self":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts\/8946"}],"collection":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8946"}],"version-history":[{"count":1,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/8946\/revisions"}],"predecessor-version":[{"id":8947,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/8946\/revisions\/8947"}],"wp:attachment":[{"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8946"},{"taxonomy":"post_tag","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}