{"id":43566,"date":"2023-08-24T12:30:31","date_gmt":"2023-06-23T21:31:50","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%86byteuint8%e8%bd%ac%e6%8d%a2%e4%b8%bafloat64%e7%9a%84%e6%96%b9%e6%b3%95%e5%9c%a8golang%e4%b8%ad\/"},"modified":"2024-04-30T19:53:40","modified_gmt":"2024-04-30T11:53:40","slug":"%e5%b0%86byteuint8%e8%bd%ac%e6%8d%a2%e4%b8%bafloat64%e7%9a%84%e6%96%b9%e6%b3%95%e5%9c%a8golang%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%86byteuint8%e8%bd%ac%e6%8d%a2%e4%b8%bafloat64%e7%9a%84%e6%96%b9%e6%b3%95%e5%9c%a8golang%e4%b8%ad\/","title":{"rendered":"\u5c06[]byte(uint8)\u8f6c\u6362\u4e3afloat64\u7684\u65b9\u6cd5\u5728golang\u4e2d"},"content":{"rendered":"

\u592a\u957f\u4e0d\u770b<\/h1>\n

\u6211\u5df2\u6839\u636e\u60a8\u7684\u8bc4\u8bba\u8fdb\u884c\u4e86\u66f4\u65b0\uff01\u6682\u65f6\u8fd9\u6837\u8bd5\u8bd5\u770b\uff0c\u4f46\u53ef\u80fd\u8fd8\u6709\u66f4\u597d\u7684\u65b9\u6cd5\uff0c\u5e0c\u671b\u6709\u7ecf\u9a8c\u7684\u4eba\u80fd\u544a\u8bc9\u6211\u3002<\/p>\n

f := *(*float64)(unsafe.Pointer(&out[0]))\r\n<\/code><\/pre>\n
\u52a8\u673a\u548c\u80cc\u666f<\/h1>\n
\u9274\u4e8e\u5e0c\u671b\u5728\u4f7f\u7528Prometheus\u8fdb\u884c\u670d\u52a1\u5668\u8d44\u6e90\u76d1\u63a7\u65f6\uff0c\u6211\u53d1\u73b0\u73b0\u6709\u7684exporter\u65e0\u6cd5\u63d0\u4f9b\u6240\u9700\u7684\u6307\u6807\uff0c\u56e0\u6b64\u51b3\u5b9a\u5c1d\u8bd5\u81ea\u5df1\u7f16\u5199\u4e00\u4e2aexporter\u3002\u8fd9\u662f\u6211\u7b2c\u4e00\u6b21\u63a5\u89e6golang\u7f16\u7a0b\uff0c\u4e0a\u4e2a\u5468\u672b\u521a\u521a\u5c1d\u8bd5\u4e86\u4e00\u4e0bhello world\u3002<\/p>\n
\u5728\u521b\u5efa\u51fa\u53e3\u5546\u4e4b\u524d\uff0c\u6211\u5728\u51e0\u79cd\u8bed\u8a00\u4e2d\u53d1\u73b0\u4e86\u4e00\u4e9b\u683c\u5f0f\u548c\u5e93\uff0c\u4f46\u6211\u51b3\u5b9a\u5c1d\u8bd5\u4f7f\u7528Go\u8bed\u8a00\u4ee5\u5b8c\u6210\u3002\u6211\u5148\u5b8c\u6210\u4e86\u5b98\u65b9\u7684\u5165\u95e8\u6559\u7a0b\uff0c\u7136\u540e\u53c2\u8003\u4e86\u4e00\u4e9b\u6587\u7ae0\u6765\u5236\u4f5c\u51fa\u53e3\u5546\u3002\u6210\u54c1\u4f4d\u4e8e\u6b64\u3002<\/p>\n
\u4f7f\u7528bash\u547d\u4ee4\u6765\u83b7\u53d6Metrics\u6570\u636e\u3002<\/h1>\n
\u6211\u6253\u7b97\u5728\u53e6\u4e00\u4e2a\u673a\u4f1a\u5b66\u4e60\u5982\u4f55\u5728golang\u4e2d\u83b7\u53d6\u4f4e\u7ea7\u522b\u4fe1\u606f\uff0c\u6240\u4ee5\u6211\u4f7f\u7528bash\u547d\u4ee4\u83b7\u53d6Linux\u670d\u52a1\u5668\u7684\u6307\u6807\u3002
\n\u53c2\u8003\u6587\u7ae0\uff1a
\n\u6574\u7406\u5982\u4f55\u5728Golang\u4e2d\u6267\u884c\u5916\u90e8\u547d\u4ee4\u7684\u65b9\u6cd5
\n\u5728Go\u4e2d\u4f7f\u7528\u7ba1\u9053\u6267\u884c\u5916\u90e8\u547d\u4ee4
\n\u5904\u7406UNIX\u547d\u4ee4\u7ba1\u9053\u7684Golang\u5b9e\u4f8b\uff08Big Sky\uff09<\/p>\n
\u6700\u7ec8\uff0c\u6211\u4f7f\u7528mattn\u5148\u751f\u53d1\u5e03\u7684go-pipeline\u6765\u7f16\u5199\u4e86UNIX\u547d\u4ee4\u7684\u7ba1\u9053\u5904\u7406\u3002<\/p>\n
go-pipeline \u7684\u8fd4\u56de\u7ed3\u679c\u662f []byte\u3002<\/h1>\n
\u5c3d\u7ba1\u80fd\u591f\u6267\u884cbash\u547d\u4ee4\uff0c\u4f46\u6211\u53d1\u73b0\u5176\u8fd4\u56de\u503c\u662f\u4ee5 []byte(uint8) \u7684\u5f62\u5f0f\u8fd4\u56de\u7684\u3002
\n\u6839\u636e\u8f93\u51fa\u683c\u5f0f\u8981\u6c42\uff0cexporter\u9700\u8981\u4f7f\u7528float64\u4f20\u9012\u6570\u5b57\uff0c\u6240\u4ee5\u9700\u8981\u8fdb\u884c []byte \u5230 float64 \u7684\u8f6c\u6362\u3002<\/p>\n
[]byte \u8f6c\u6362\u4e3a float64 \u7684\u65b9\u6cd5<\/h1>\n
\u66ab\u4e14\u7c97\u7565\u5730\u641c\u5c0b\u4e86\u4e00\u4e0b\uff0c\u5728StackOverFlow\u4e0a\u6709\u4e00\u7bc7\u540d\u70ba\u300c\u5c07byte\u6578\u7d44\u201c[]uint8\u201d\u8f49\u63db\u70bafloat64\u5728GoLang\u4e2d(StackOverFlow)\u300d\u7684\u6587\u7ae0\uff0c\u4f3c\u4e4e\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528\u5eab\u6216\u51fd\u6578\u4f86\u5b8c\u6210\uff0c\u770b\u8d77\u4f86\u8981\u5c0d\u4e8c\u9032\u5236\u6578\u7d44\u9032\u884c\u67d0\u7a2e\u8655\u7406\uff0c\u5514\uff0c\u6211\u4e0d\u592a\u60f3\u9019\u9ebc\u505a\u3002<\/p>\n
\u5728\u56fe\u4e66\u9986\u4e2d\uff0c\u6211\u53d1\u73b0\u53ef\u4ee5\u4f7f\u7528strconv\u8fd9\u4e2a\u51fd\u6570\u3002
\n\u7ecf\u8fc7\u4e00\u756a\u5c1d\u8bd5\u540e\uff0c\u6211\u5f97\u51fa\u4e86\u4ee5\u4e0b\u7ed3\u8bba\uff1a\u9996\u5148\u5c06[]byte\u8f6c\u5316\u4e3astring\uff0c\u540c\u65f6\u526a\u6389\u672b\u5c3e\u7684\\n\u5b57\u7b26\uff0c\u7136\u540e\u518d\u7528strconv\u5c06\u5f97\u5230\u7684string\u8f6c\u6362\u4e3afloat64\u7c7b\u578b\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u6cd5\uff0c\u6211\u4eec\u6210\u529f\u89e3\u51b3\u4e86\u95ee\u9898\u3002\u4f46\u662f\uff0c\u771f\u7684\u9700\u8981\u4e3a\u4e86\u8fd9\u4e48\u7b80\u5355\u7684\u9700\u6c42\u505a\u8fd9\u4e48\u591a\u6b65\u9aa4\u5417\uff1f\u8fd9\u8ba9\u6211\u6709\u4e9b\u6000\u7591\u3002<\/p>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \/\/  \"fmt\"<\/span>\r\n    \"flag\"<\/span>\r\n    \"github.com\/prometheus\/client_golang\/prometheus\"<\/span>\r\n    \"github.com\/prometheus\/client_golang\/prometheus\/promhttp\"<\/span>\r\n    \"log\"<\/span>\r\n    \"net\/http\"<\/span>\r\n\r\n    \"github.com\/mattn\/go-pipeline\"<\/span> \/\/ go-pipeline : https:\/\/github.com\/mattn\/go-pipeline<\/span>\r\n    \"strconv\"<\/span>\r\n    \"strings\"<\/span>\r\n    \"unsafe\"<\/span>\r\n)<\/span>\r\n\r\n~~<\/span> \u4e2d\u7565<\/span> ~~<\/span>\r\n\r\nfunc<\/span> get443Estab<\/span>()<\/span> float64<\/span> {<\/span>\r\n    out<\/span>,<\/span> err<\/span> :=<\/span> pipeline<\/span>.<\/span>Output<\/span>(<\/span>\r\n        []<\/span>string<\/span>{<\/span>\"netstat\"<\/span>,<\/span> \"-n\"<\/span>},<\/span>\r\n        []<\/span>string<\/span>{<\/span>\"grep\"<\/span>,<\/span> \"ESTABLISHED\"<\/span>},<\/span>\r\n        []<\/span>string<\/span>{<\/span>\"grep\"<\/span>,<\/span> \":443\"<\/span>},<\/span>\r\n        []<\/span>string<\/span>{<\/span>\"wc\"<\/span>,<\/span> \"-l\"<\/span>},<\/span>\r\n    )<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        \/\/ PIPESTATUS\u306e\u4e2d\u306b\u4e00\u3064\u3067\u30820\u4ee5\u5916\u304c\u542b\u307e\u308c\u308b\u3068 err : exit status ${status} \u306b\u306a\u308b\u306e\u3067\u6ce8\u610f<\/span>\r\n        return<\/span> float64<\/span>(<\/span>0<\/span>)<\/span>\r\n    }<\/span>\r\n    f<\/span>,<\/span> err<\/span> :=<\/span> strconv<\/span>.<\/span>ParseFloat<\/span>(<\/span>strings<\/span>.<\/span>TrimRight<\/span>(<\/span>*<\/span>(<\/span>*<\/span>string<\/span>)(<\/span>unsafe<\/span>.<\/span>Pointer<\/span>(<\/span>&<\/span>out<\/span>)),<\/span> \"<\/span>\\n<\/span>\"<\/span>),<\/span> 64<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        return<\/span> float64<\/span>(<\/span>0<\/span>)<\/span>\r\n    }<\/span>\r\n    return<\/span> float64<\/span>(<\/span>f<\/span>)<\/span>\r\n}<\/span>\r\n\r\n~~<\/span> \u7565<\/span> ~~<\/span>\r\n\r\n<\/code><\/pre>\n
\u5982\u679c\u6709\u66f4\u597d\u7684\u65b9\u6cd5\uff0c\u8bf7\u544a\u8bc9\u6211 m(_ _)m<\/p>\n
\u7248\u672c\u7b49<\/h1>\n
 # go version\r\ngo version go1.10.4 linux\/amd64\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u592a\u957f\u4e0d\u770b \u6211\u5df2\u6839\u636e\u60a8\u7684\u8bc4\u8bba\u8fdb\u884c\u4e86\u66f4\u65b0\uff01\u6682\u65f6\u8fd9\u6837\u8bd5\u8bd5\u770b\uff0c\u4f46\u53ef\u80fd\u8fd8\u6709\u66f4\u597d\u7684\u65b9\u6cd5\uff0c\u5e0c\u671b\u6709\u7ecf\u9a8c\u7684\u4eba\u80fd\u544a\u8bc9\u6211\u3002 f := […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-43566","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u5c06[]byte(uint8)\u8f6c\u6362\u4e3afloat64\u7684\u65b9\u6cd5\u5728golang\u4e2d - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5c06byteuint8\u8f6c\u6362\u4e3afloat64\u7684\u65b9\u6cd5\u5728golang\u4e2d\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5c06[]byte(uint8)\u8f6c\u6362\u4e3afloat64\u7684\u65b9\u6cd5\u5728golang\u4e2d\" \/>\n<meta property=\"og:description\" content=\"\u592a\u957f\u4e0d\u770b \u6211\u5df2\u6839\u636e\u60a8\u7684\u8bc4\u8bba\u8fdb\u884c\u4e86\u66f4\u65b0\uff01\u6682\u65f6\u8fd9\u6837\u8bd5\u8bd5\u770b\uff0c\u4f46\u53ef\u80fd\u8fd8\u6709\u66f4\u597d\u7684\u65b9\u6cd5\uff0c\u5e0c\u671b\u6709\u7ecf\u9a8c\u7684\u4eba\u80fd\u544a\u8bc9\u6211\u3002 f := […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5c06byteuint8\u8f6c\u6362\u4e3afloat64\u7684\u65b9\u6cd5\u5728golang\u4e2d\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-06-23T21:31:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-30T11:53:40+00:00\" \/>\n<meta name=\"author\" content=\"\u5b87, \u534e\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u5b87, \u534e\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%86byteuint8%e8%bd%ac%e6%8d%a2%e4%b8%bafloat64%e7%9a%84%e6%96%b9%e6%b3%95%e5%9c%a8golang%e4%b8%ad\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%86byteuint8%e8%bd%ac%e6%8d%a2%e4%b8%bafloat64%e7%9a%84%e6%96%b9%e6%b3%95%e5%9c%a8golang%e4%b8%ad\/\",\"name\":\"\u5c06[]byte(uint8)\u8f6c\u6362\u4e3afloat64\u7684\u65b9\u6cd5\u5728golang\u4e2d - 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