{"id":955,"date":"2019-12-16T09:15:21","date_gmt":"2019-12-16T01:15:21","guid":{"rendered":"https:\/\/sora.sound.moe\/?p=955"},"modified":"2019-12-16T09:15:21","modified_gmt":"2019-12-16T01:15:21","slug":"javascript-%e9%9a%90%e8%97%8f%e7%9a%84%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f","status":"publish","type":"post","link":"https:\/\/sora.sound.moe\/?p=955","title":{"rendered":"JavaScript &#8211; \u9690\u85cf\u7684\u5185\u5b58\u6cc4\u6f0f"},"content":{"rendered":"\n<p>\u4f17\u6240\u5468\u77e5\uff0cJavaScript \u4f7f\u7528\u57fa\u4e8e\u6807\u8bb0-\u6e05\u9664\u7b97\u6cd5\u7684\u81ea\u52a8\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u4e00\u822c\u6765\u8bf4\u5728\u4f7f\u7528\u95ed\u5305\u3001\u5b9a\u65f6\u5668\u7b49\u529f\u80fd\u65f6\u6ce8\u610f\u91ca\u653e\u5c31\u4e0d\u4f1a\u6709\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\u3002\u4f46\u6709\u4e9b\u65f6\u5019\uff0c\u5185\u5b58\u6cc4\u6f0f\u4e5f\u4f1a\u51fa\u73b0\u5728\u5f15\u64ce\u76d6\u4e0b\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>\u6709\u4e00\u4e2a\u5f88\u6b63\u5e38\u7684\u9700\u6c42\uff0c\u8bfb\u5165\u4e00\u4e2a\u6587\u4ef6\uff0c\u7136\u540e\u6309\u884c\u5206\u5272\u5bf9\u6bcf\u4e00\u884c\u8fdb\u884c\u5904\u7406\u3002<\/p>\n\n\n\n<p>Minyami \u7684\u76f4\u64ad\u4e0b\u8f7d\u6a21\u5f0f\u5c31\u662f\u5b9a\u65f6\u8bfb\u53d6\u670d\u52a1\u5668\u7684 m3u8 \u6587\u4ef6\uff0c\u7ecf\u8fc7 m3u8 parser\uff0c\u627e\u51fa\u9700\u8981\u4e0b\u8f7d\u7684 chunk\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\u5c31\u5bf9 m3u8 \u6587\u4ef6\u8fdb\u884c\u4e86\u6309\u884c\u5206\u5272\u3002<\/p>\n\n\n\n<p>\u7528\u6237\u53cd\u9988\uff0c\u5728\u4e0b\u8f7d YouTube DVR \u76f4\u64ad\u65f6\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\uff0c\u5b9e\u6d4b\u53ef\u590d\u73b0\uff0c\u6f0f\u7684\u8fd8\u5f88\u591a\uff0c\u5982\u679c\u6302\u4e2a\u4e00\u4e24\u4e2a\u5c0f\u65f6\u80af\u5b9a\u662f\u8981 OOM \u7684\u3002<\/p>\n\n\n\n<p>\u6309\u7167\u6392\u67e5\u5185\u5b58\u6cc4\u6f0f\u7684\u57fa\u672c\u64cd\u4f5c\uff0c\u542f\u7528 node remote debugger\uff0c\u7528 Chrome \u7684\u8c03\u8bd5\u5de5\u5177\u5bf9\u5185\u5b58\u6293\u53d6 snapshot\uff0c\u6253\u51e0\u4e2a\u70b9\u8fdb\u884c diff \u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" loading=\"lazy\" width=\"548\" height=\"252\" src=\"https:\/\/sora.sound.moe\/wp-content\/uploads\/2019\/12\/image.png\" alt=\"\" class=\"wp-image-956\"\/><\/figure>\n\n\n\n<p>\u7ed3\u679c\u51fa\u73b0\u4e86\u7c7b\u4f3c\u56fe\u4e2d\u7684\u60c5\u51b5\uff08\u56fe\u662f\u968f\u4fbf\u622a\u7684\uff0c\u4e0d\u662f\u771f\u5b9e\u60c5\u51b5\uff09\u3002sliced string \u4e2d\u7684 parent \u5e38\u5e38\u4e3a\u6574\u4e2a m3u8 \u7684\u5185\u5bb9\uff0c\u800c\u5bf9\u4e8e YouTube \u6765\u8bf4\u6bcf\u4e2a m3u8 \u53ef\u80fd\u6709\u6570 MB\uff0c\u8fd9\u5c31\u9020\u6210\u4e86\u975e\u5e38\u5feb\u7684\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n\n\n\n<p>\u4e00\u5f00\u59cb\u6211\u4ee5\u4e3a\u662f\u6211\u7684\u5b9a\u65f6\u5668\u2014\u2014\u88ab\u7528\u5728\u63a7\u5236\u4efb\u52a1\u8d85\u65f6\u2014\u2014\u53d1\u751f\u4e86\u6cc4\u6f0f\uff0c\u4e8e\u662f\u6211\u624b\u52a8\u5728\u5904\u7406\u4efb\u52a1\u7684\u65f6\u5019\u52a0\u4e0a\u4e86 finally \u7136\u540e\u628a\u5b9a\u65f6\u5668\u91ca\u653e\u6389\uff0c\u7ed3\u679c\u53d1\u73b0\u5e76\u65e0\u6548\u679c\u3002<\/p>\n\n\n\n<p>\u6700\u540e\u641c\u7d22\u4e86\u4e00\u756a<\/p>\n\n\n\n<p><a href=\"https:\/\/github.com\/nodejs\/help\/issues\/711\">https:\/\/github.com\/nodejs\/help\/issues\/711<\/a><\/p>\n\n\n\n<p>\u53d1\u73b0 v8 \u5185\u90e8\uff0c\u5bf9 split\/slice \u51fa\u7684\u5b57\u7b26\u4e32\u4f1a\u5728\u5185\u90e8\u4fdd\u7559\u4e00\u4e2a\u5bf9 parent \u7684\u5f15\u7528\uff0c\u56e0\u4e3a split \u51fa\u7684\u5b57\u7b26\u4e32\u4e00\u76f4\u88ab\u4f7f\u7528\uff0c\u8fd9\u4e2a parent \u4e5f\u5c31\u4e0d\u4f1a\u88ab\u91ca\u653e\uff0c\u5f53\u6709\u6570\u5343\u4e2a split \u51fa\u7684\u5b57\u7b26\u4e32\u65f6\uff0c\u53ef\u80fd\u5c31\u4f1a\u4fdd\u7559\u6570\u767e\u4e2a\u5bf9\u4e0d\u540c\u7684 parent \u7684\u5f15\u7528\u3002\u5b9e\u9645\u4e0a\u5728\u6211\u4eec\u7684\u5e94\u7528\u573a\u666f\u4e2d\uff0cparent\uff08m3u8 \u5185\u5bb9\uff09\u53ea\u9700\u8981\u89e3\u6790\u8fc7\u4e4b\u540e\u5c31\u53ef\u4ee5\u6254\u6389\u4e86\uff0c\u8fd9\u91cc\u7684\u5f15\u7528\u662f\u65e0\u7528\u800c\u6d6a\u8d39\u7684\u3002<\/p>\n\n\n\n<p>\u5bf9 split \u51fa\u7684\u5b57\u7b26\u4e32\u505a\u4e86\u4e00\u6b21\u590d\u5236\uff0c\u4f7f parent \u4e0d\u518d active\uff0c\u81ea\u52a8\u88ab gc\uff0c\u95ee\u9898\u89e3\u51b3\u3002<\/p>\n\n\n\n<p>See:  <br \/><a href=\"https:\/\/github.com\/Last-Order\/Minyami\/blob\/master\/src\/core\/m3u8.ts#L43\">https:\/\/github.com\/Last-Order\/Minyami\/blob\/master\/src\/core\/m3u8.ts#L43<\/a> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f17\u6240\u5468\u77e5\uff0cJavaScript \u4f7f\u7528\u57fa\u4e8e\u6807\u8bb0-\u6e05\u9664\u7b97\u6cd5\u7684\u81ea\u52a8\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u4e00\u822c\u6765\u8bf4\u5728\u4f7f\u7528\u95ed\u5305\u3001\u5b9a\u65f6\u5668\u7b49\u529f\u80fd\u65f6\u6ce8 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/sora.sound.moe\/?p=955\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201cJavaScript &#8211; \u9690\u85cf\u7684\u5185\u5b58\u6cc4\u6f0f\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"twentyseventeen-featured-image":false,"twentyseventeen-thumbnail-avatar":false},"uagb_author_info":{"display_name":"Sora","author_link":"https:\/\/sora.sound.moe\/?author=1"},"uagb_comment_info":0,"uagb_excerpt":"\u4f17\u6240\u5468\u77e5\uff0cJavaScript \u4f7f\u7528\u57fa\u4e8e\u6807\u8bb0-\u6e05\u9664\u7b97\u6cd5\u7684\u81ea\u52a8\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u4e00\u822c\u6765\u8bf4\u5728\u4f7f\u7528\u95ed\u5305\u3001\u5b9a\u65f6\u5668\u7b49\u529f\u80fd\u65f6\u6ce8&hellip;","_links":{"self":[{"href":"https:\/\/sora.sound.moe\/index.php?rest_route=\/wp\/v2\/posts\/955"}],"collection":[{"href":"https:\/\/sora.sound.moe\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sora.sound.moe\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sora.sound.moe\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sora.sound.moe\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=955"}],"version-history":[{"count":0,"href":"https:\/\/sora.sound.moe\/index.php?rest_route=\/wp\/v2\/posts\/955\/revisions"}],"wp:attachment":[{"href":"https:\/\/sora.sound.moe\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sora.sound.moe\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sora.sound.moe\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}