{"id":44435,"date":"2023-10-25T12:02:19","date_gmt":"2023-12-24T17:14:35","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/go%e4%b8%8e%e5%85%b6%e4%bb%96%e8%af%ad%e8%a8%80%e7%9a%84%e4%b8%8d%e5%90%8c%e4%b9%8b%e5%a4%84%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f\/"},"modified":"2024-05-04T05:53:49","modified_gmt":"2024-05-03T21:53:49","slug":"go%e4%b8%8e%e5%85%b6%e4%bb%96%e8%af%ad%e8%a8%80%e7%9a%84%e4%b8%8d%e5%90%8c%e4%b9%8b%e5%a4%84%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/go%e4%b8%8e%e5%85%b6%e4%bb%96%e8%af%ad%e8%a8%80%e7%9a%84%e4%b8%8d%e5%90%8c%e4%b9%8b%e5%a4%84%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f\/","title":{"rendered":"Go\u4e0e\u5176\u4ed6\u8bed\u8a00\u7684\u4e0d\u540c\u4e4b\u5904\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

\u524d\u8a00<\/h1>\n

\u56e0\u4e3a\u611f\u5192\u4e86\u800c\u8bf7\u5047\u4f11\u606f\uff0c\u4e8e\u662f\u6211\u51b3\u5b9a\u5229\u7528\u8fd9\u4e2a\u673a\u4f1a\u5b66\u4e60\u4e00\u76f4\u4ee5\u6765\u8ba9\u6211\u597d\u5947\u7684Go\u8bed\u8a00\uff0c\u5e76\u5f00\u59cb\u5728\u4e0b\u9762\u7684\u7f51\u7ad9\u8fdb\u884c\u5b66\u4e60\uff1ahttps:\/\/golang.org\/doc\/<\/p>\n

\u5728\u5b66\u4e60\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4f1a\u5199\u4e0b\u6211\u8ba4\u4e3a\u5176\u4ed6\u8bed\u8a00\u4e2d\u6ca1\u6709\u7684\u529f\u80fd\u3002
\n\u201c\u5176\u4ed6\u8bed\u8a00\u4e2d\u6ca1\u6709\u7684\u529f\u80fd\u201d\u662f\u6307\u5bf9\u6211\u6765\u8bf4\u7b2c\u4e00\u6b21\u89c1\u5230\u7684\u529f\u80fd\u3002\u4ee5\u4e0b\u7684\u7f16\u7a0b\u8bed\u8a00\u5e94\u8be5\u5927\u81f4\u4e0a\u6211\u90fd\u4e86\u89e3\uff0c\u6240\u4ee5\u8fd9\u4e9b\u8bed\u8a00\u5e94\u8be5\u6ca1\u6709\u8fd9\u4e2a\u529f\u80fd\u3002
\nPascal, C, Java, Perl, Python, TypeScript
\n\u5176\u4ed6\u8bed\u8a00\u53ef\u80fd\u6709\u7c7b\u4f3c\u7684\u529f\u80fd\uff0c\u4f46\u8fd8\u8bf7\u5bbd\u5bb9\u3002<\/p>\n

\u5207\u7247\u7684\u5bb9\u91cf s\u012b de<\/h1>\n

\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u957f\u5ea6\u4e3a6\u7684int\u6570\u7ec4\uff0c\u5b83\u4e0eC\u8bed\u8a00\u7684\u6570\u7ec4\u4e00\u6837\u662f\u56fa\u5b9a\u957f\u5ea6\u7684\u3002<\/p>\n

arrayedPrimes<\/span> :=<\/span> [<\/span>6<\/span>]<\/span>int<\/span>{<\/span>2<\/span>,<\/span> 3<\/span>,<\/span> 5<\/span>,<\/span> 7<\/span>,<\/span> 11<\/span>,<\/span> 13<\/span>}<\/span>\r\n<\/code><\/pre>\n
\u7531\u4e8e\u56fa\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\u4f7f\u7528\u8d77\u6765\u4e0d\u592a\u65b9\u4fbf\uff0c\u6240\u4ee5\u7ecf\u5e38\u4f7f\u7528\u4ee5\u4e0b\u7684\u5207\u7247\u65b9\u6cd5\u3002<\/p>\n
slicedPrimes<\/span> :=<\/span> []<\/span>int<\/span>{<\/span>2<\/span>,<\/span> 3<\/span>,<\/span> 5<\/span>,<\/span> 7<\/span>,<\/span> 11<\/span>,<\/span> 13<\/span>}<\/span>\r\n<\/code><\/pre>\n
\u5728\u5207\u7247\u4e2d\u6709\u957f\u5ea6\u548c\u5bb9\u91cf\u7684\u6982\u5ff5\uff0c\u957f\u5ea6\u6307\u7684\u662f\u5207\u7247\u5f15\u7528\u7684\u6570\u7ec4\u5927\u5c0f\uff0c\u5bb9\u91cf\u6307\u7684\u662f\u5207\u7247\u5f15\u7528\u7684\u6570\u7ec4\u76f4\u5230\u672b\u5c3e\u7684\u5927\u5c0f\u3002<\/p>\n
\u56e0\u6b64\uff0c\u4f1a\u6709\u4ee5\u4e0b\u7684\u884c\u4e3a\u3002<\/p>\n
firstSlice<\/span> :=<\/span> slicedPrimes<\/span>[<\/span>0<\/span>:<\/span>4<\/span>]<\/span> \/\/ [2, 3, 5, 7]<\/span>\r\nlen<\/span>(<\/span>firstSlice<\/span>)<\/span> \/\/ -> [2, 3, 5, 7]\u306a\u306e\u30674<\/span>\r\ncap<\/span>(<\/span>firstSlice<\/span>)<\/span> \/\/ -> [2, 3, 5, 7, 11, 13]\u306a\u306e\u30676<\/span>\r\n\r\nsecondSlice<\/span> :=<\/span> slicedPrimes<\/span>[<\/span>2<\/span>:<\/span>4<\/span>]<\/span> \/\/ [5, 7]<\/span>\r\nlen<\/span>(<\/span>secondSlice<\/span>)<\/span> \/\/ -> [5, 7]\u306a\u306e\u30672<\/span>\r\ncap<\/span>(<\/span>secondSlice<\/span>)<\/span> \/\/ -> [5, 7, 11, 13]\u306a\u306e\u30674<\/span>\r\n<\/code><\/pre>\n
\u754c\u9762\u7684\u81ea\u52a8\u5b9e\u73b0 de<\/h1>\n
\u5728Go\u8bed\u8a00\u4e2d\uff0c\u6ca1\u6709\u7c7b\u7684\u7ee7\u627f\u3002\u867d\u7136\u6709\u63a5\u53e3\u7684\u5b58\u5728\uff0c\u4f46\u7a0b\u5e8f\u5458\u5e76\u4e0d\u9700\u8981\u5b9e\u73b0\u63a5\u53e3\u3002
\n\u76f8\u53cd\uff0c\u5982\u679c\u67d0\u4e2a\u7ed3\u6784\u4f53\u7684\u65b9\u6cd5\u5b9e\u73b0\u4e86\u67d0\u4e2a\u5df2\u5b9a\u4e49\u63a5\u53e3\u7684\u6240\u6709\u65b9\u6cd5\uff0c\u90a3\u4e48\u8be5\u7ed3\u6784\u4f53\u5c06\u88ab\u81ea\u52a8\u89c6\u4e3a\u5b9e\u73b0\u4e86\u8be5\u63a5\u53e3\u3002<\/p>\n
\u6bd4\u5982\u8bf4\uff0c\u7ed9\u5b9a\u4ee5\u4e0b\u7684\u7ed3\u6784\u4f53\uff1a<\/p>\n
type<\/span> person<\/span> struct<\/span> {<\/span>\r\n    firstname<\/span> string<\/span>\r\n    sirname<\/span>   string<\/span>\r\n    age<\/span>       int<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5047\u8bbe\u4ee5\u4e0b\u65b9\u6cd5\u5df2\u88ab\u5b9a\u4e49\u3002<\/p>\n
func<\/span> (<\/span>p<\/span> person<\/span>)<\/span> getSirName<\/span>()<\/span> string<\/span> {<\/span>\r\n    return<\/span> p<\/span>.<\/span>sirname<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>p<\/span> person<\/span>)<\/span> getFirstName<\/span>()<\/span> string<\/span> {<\/span>\r\n    return<\/span> p<\/span>.<\/span>firstname<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>p<\/span> person<\/span>)<\/span> getAge<\/span>()<\/span> int<\/span> {<\/span>\r\n    return<\/span> p<\/span>.<\/span>age<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6b64\u5916\uff0c\u5047\u8bbe\u5b9a\u4e49\u4e86\u4ee5\u4e0b\u4e24\u4e2a\u63a5\u53e3\u3002<\/p>\n
type<\/span> japaneseFriend<\/span> interface<\/span> {<\/span>\r\n    getSirName<\/span>()<\/span> string<\/span>\r\n    getAge<\/span>()<\/span> int<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> americanFriend<\/span> interface<\/span> {<\/span>\r\n    getFirstName<\/span>()<\/span> string<\/span>\r\n    getAge<\/span>()<\/span> int<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7ed3\u6784\u4f53”person”\u5e76\u6ca1\u6709\u7f16\u5199”implement”\u7b49\u5185\u5bb9\uff0c\u4f46\u662f\u5b83\u4f1a\u81ea\u52a8\u5b9e\u73b0”japaneseFriend”\u548c”americanFriend”\u4e24\u8005\u3002<\/p>\n
\u4e0b\u9762\u7684\u4ee3\u7801\u5c06person\u8d4b\u503c\u7ed9\u7c7b\u578b\u4e3aamericanFriend\u7684\u53d8\u91cf\uff0c\u4f46\u662f\u5728switch\u8bed\u53e5\u4e2d\u6267\u884c\u7c7b\u578b\u68c0\u67e5\u65f6\uff0c\u4f1a\u6267\u884cjapaneseFriend\u7684\u4ee3\u7801\u3002\u8fd9\u8bf4\u660eperson\u65e2\u662fjapaneseFriend\u53c8\u662famericanFriend\u3002<\/p>\n
\/\/ americanFriend\u578b\u306e\u5909\u6570\u306b\u4ee3\u5165<\/span>\r\nvar<\/span> friend<\/span> americanFriend<\/span> =<\/span> person<\/span>{<\/span>\"tanaka\"<\/span>,<\/span> 20<\/span>}<\/span>\r\nswitch<\/span> friend<\/span>.<\/span>(<\/span>type<\/span>)<\/span> {<\/span>\r\ncase<\/span> japaneseFriend<\/span>:<\/span>\r\n    \/\/ japaneseFriend\u578b\u3067\u3082\u3042\u308b\u306e\u3067\u3001\u3053\u3061\u3089\u306e\u30b3\u30fc\u30c9\u304c\u5b9f\u884c\u3055\u308c\u308b<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"Japanese Friend\"<\/span>)<\/span>\r\ncase<\/span> americanFriend<\/span>:<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"American Friend\"<\/span>)<\/span>\r\ndefault<\/span>:<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"none of above\"<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u9519\u8bef\u63a5\u53e3\uff0c\u4e0d\u662f\u4f8b\u5916\u3002<\/h1>\n
\u7531\u4e8eGo\u8bed\u8a00\u4e2d\u6ca1\u6709\u5f02\u5e38\u673a\u5236\uff0c\u6240\u4ee5\u8981\u68c0\u6d4b\u65b9\u6cd5\u6267\u884c\u7684\u9519\u8bef\uff0c\u9700\u8981\u5bf9\u65b9\u6cd5\u6267\u884c\u65f6\u8fd4\u56de\u7684error\u503c\u8fdb\u884c\u68c0\u67e5\u3002<\/p>\n
i<\/span>,<\/span> err<\/span> :=<\/span> strconv<\/span>.<\/span>Atoi<\/span>(<\/span>\"42\"<\/span>)<\/span>\r\nif<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n    fmt<\/span>.<\/span>Printf<\/span>(<\/span>\"couldn't convert number: %v<\/span>\\n<\/span>\"<\/span>,<\/span> err<\/span>)<\/span>\r\n    return<\/span>\r\n}<\/span>\r\nfmt<\/span>.<\/span>Println<\/span>(<\/span>\"Converted integer:\"<\/span>,<\/span> i<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5982\u679cerror\u7684\u503c\u662fnil\uff0c\u90a3\u5c31\u6ca1\u6709\u95ee\u9898\uff1b\u5982\u679c\u4e0d\u662fnil\uff0c\u90a3\u5c31\u8868\u793a\u53d1\u751f\u4e86\u9519\u8bef\u3002<\/p>\n
\u534f\u7a0b<\/h1>\n
\u8981\u5728Go\u8bed\u8a00\u4e2d\u8fdb\u884c\u5f02\u6b65\u5904\u7406\uff0c\u53ea\u9700\u8981\u5728\u65b9\u6cd5\u8c03\u7528\u4e4b\u524d\u5199\u4e0a”go”\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n
func<\/span> someMethod<\/span>()<\/span> {<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"hello\"<\/span>)<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>\"goroutine\"<\/span>)<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n    go<\/span> someMethod<\/span>()<\/span> \/\/ \u76f4\u3061\u306b\u51e6\u7406\u304c\u7d42\u4e86\u3059\u308b\u306e\u3067print\u306f\u3055\u308c\u306a\u3044<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728Go\u8bed\u8a00\u4e2d\uff0c\u4e3a\u4e86\u5728goroutine\u4e4b\u95f4\u4f20\u9012\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528channel\u3002channel\u662f\u4e00\u79cd\u5148\u8fdb\u5148\u51fa\uff08FIFO\uff09\u7684\u6570\u636e\u7ed3\u6784\uff0c\u53ef\u4ee5\u5c06\u5176\u89c6\u4e3a\u6d88\u606f\u961f\u5217\u3002<\/p>\n
\u901a\u8fc7\u4f7f\u7528`ch := make(chan string)`\uff0c\u53ef\u4ee5\u751f\u6210\u4e00\u4e2astring\u7c7b\u578b\u7684channel\uff0c\u5e76\u5c06\u5176\u4f20\u9012\u7ed9\u8fdb\u884c\u5f02\u6b65\u5904\u7406\u7684\u65b9\u6cd5\u3002<\/p>\n
\u5728\u5f02\u6b65\u5904\u7406\u7684\u4e00\u4fa7\uff0c\u53ef\u4ee5\u901a\u8fc7`ch <- “hello”`\u8fd9\u6837\u7684\u65b9\u5f0f\u5c06\u5b57\u7b26\u4e32\u5199\u5165channel\u3002<\/p>\n
\u5728\u7b49\u5f85\u5411ch\u5199\u5165\u7684\u4e00\u4fa7\uff0c\u53ef\u4ee5\u4f7f\u7528`for msg := range ch`\u8fd9\u6837\u7684\u65b9\u5f0f\uff0c\u963b\u585e\u7ebf\u7a0b\u7684\u5904\u7406\u76f4\u5230ch\u4e2d\u6709\u6d88\u606f\u88ab\u5199\u5165\uff0c\u5e76\u5728\u5199\u5165\u540e\u5c06\u6d88\u606f\u8d4b\u503c\u7ed9msg\u3002<\/p>\n
\u5982\u679c\u5728\u67d0\u5904\u8c03\u7528\u4e86`close(ch)`\uff0c\u5219\u4f1a\u9000\u51fa\u5faa\u73af\u3002<\/p>\n
func<\/span> someMethod<\/span>(<\/span>ch<\/span> chan<\/span> string<\/span>)<\/span> {<\/span>\r\n    ch<\/span> <-<\/span> \"hello\"<\/span>\r\n    ch<\/span> <-<\/span> \"goroutine\"<\/span>\r\n    close<\/span>(<\/span>ch<\/span>)<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n    ch<\/span> :=<\/span> make<\/span>(<\/span>chan<\/span> string<\/span>)<\/span>\r\n    go<\/span> someMethod<\/span>(<\/span>ch<\/span>)<\/span>\r\n    for<\/span> msg<\/span> :=<\/span> range<\/span> ch<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>msg<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span> \r\n<\/code><\/pre>\n
Go\u8bed\u8a00\u4e4b\u65c5\u7ec3\u4e60\uff1a\u7f51\u7edc\u722c\u866b\u95ee\u9898\u7684\u6211\u7684\u89e3\u51b3\u65b9\u6848<\/h1>\n
\u56e0\u4e3a\u6709\u70b9\u56f0\u96be\uff0c\u6240\u4ee5\u6211\u89c9\u5f97\u5199\u4e0b\u6765\u53ef\u80fd\u5bf9\u522b\u4eba\u6709\u5e2e\u52a9\u3002<\/p>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"fmt\"<\/span>\r\n    \"sync\"<\/span>\r\n)<\/span>\r\n\r\ntype<\/span> safeSiteMap<\/span> struct<\/span> {<\/span>\r\n    crawledMap<\/span> map<\/span>[<\/span>string<\/span>]<\/span>string<\/span>\r\n    mutex<\/span> sync<\/span>.<\/span>RWMutex<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>siteMap<\/span> *<\/span>safeSiteMap<\/span>)<\/span> put<\/span>(<\/span>url<\/span> string<\/span>,<\/span> body<\/span> string<\/span>)<\/span> {<\/span>\r\n    siteMap<\/span>.<\/span>mutex<\/span>.<\/span>Lock<\/span>()<\/span>\r\n    siteMap<\/span>.<\/span>crawledMap<\/span>[<\/span>url<\/span>]<\/span> =<\/span> body<\/span>\r\n    siteMap<\/span>.<\/span>mutex<\/span>.<\/span>Unlock<\/span>()<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>siteMap<\/span> *<\/span>safeSiteMap<\/span>)<\/span> hasCrawled<\/span>(<\/span>url<\/span> string<\/span>)<\/span> bool<\/span> {<\/span>\r\n    siteMap<\/span>.<\/span>mutex<\/span>.<\/span>RLock<\/span>()<\/span>\r\n    _<\/span>,<\/span> ok<\/span> :=<\/span> siteMap<\/span>.<\/span>crawledMap<\/span>[<\/span>url<\/span>]<\/span>\r\n    siteMap<\/span>.<\/span>mutex<\/span>.<\/span>RUnlock<\/span>()<\/span>\r\n    return<\/span> ok<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> Fetcher<\/span> interface<\/span> {<\/span>\r\n    \/\/ Fetch returns the body of URL and<\/span>\r\n    \/\/ a slice of URLs found on that page.<\/span>\r\n    Fetch<\/span>(<\/span>url<\/span> string<\/span>)<\/span> (<\/span>body<\/span> string<\/span>,<\/span> urls<\/span> []<\/span>string<\/span>,<\/span> err<\/span> error<\/span>)<\/span>\r\n}<\/span>\r\n\r\n\/\/ Crawl uses fetcher to recursively crawl<\/span>\r\n\/\/ pages starting with url, to a maximum of depth.<\/span>\r\nfunc<\/span> Crawl<\/span>(<\/span>url<\/span> string<\/span>,<\/span> depth<\/span> int<\/span>,<\/span> fetcher<\/span> Fetcher<\/span>,<\/span> siteMap<\/span> safeSiteMap<\/span>,<\/span> wg<\/span> *<\/span>sync<\/span>.<\/span>WaitGroup<\/span>)<\/span> {<\/span>\r\n\r\n    defer<\/span> wg<\/span>.<\/span>Done<\/span>()<\/span>\r\n\r\n    var<\/span> concreteCrawl<\/span> func<\/span>(<\/span>string<\/span>,<\/span> int<\/span>)<\/span>\r\n    concreteCrawl<\/span> =<\/span> func<\/span>(<\/span>url<\/span> string<\/span>,<\/span> depth<\/span> int<\/span>)<\/span> {<\/span>\r\n        \/\/ ensure wg.Done() when method returns<\/span>\r\n        defer<\/span> wg<\/span>.<\/span>Done<\/span>()<\/span>\r\n        if<\/span> depth<\/span> <=<\/span> 0<\/span> {<\/span>\r\n            return<\/span>\r\n        }<\/span>\r\n        body<\/span>,<\/span> urls<\/span>,<\/span> err<\/span> :=<\/span> fetcher<\/span>.<\/span>Fetch<\/span>(<\/span>url<\/span>)<\/span>\r\n        if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n            fmt<\/span>.<\/span>Println<\/span>(<\/span>err<\/span>)<\/span>\r\n            return<\/span>\r\n        }<\/span>\r\n        siteMap<\/span>.<\/span>put<\/span>(<\/span>url<\/span>,<\/span> body<\/span>)<\/span>\r\n        fmt<\/span>.<\/span>Printf<\/span>(<\/span>\"found: %s %q<\/span>\\n<\/span>\"<\/span>,<\/span> url<\/span>,<\/span> body<\/span>)<\/span>\r\n        for<\/span> _<\/span>,<\/span> u<\/span> :=<\/span> range<\/span> urls<\/span> {<\/span>\r\n            if<\/span> siteMap<\/span>.<\/span>hasCrawled<\/span>(<\/span>u<\/span>)<\/span> {<\/span>\r\n                continue<\/span>\r\n            }<\/span>\r\n            wg<\/span>.<\/span>Add<\/span>(<\/span>1<\/span>)<\/span>\r\n            go<\/span> concreteCrawl<\/span>(<\/span>u<\/span>,<\/span> depth<\/span>-<\/span>1<\/span>)<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n    wg<\/span>.<\/span>Add<\/span>(<\/span>1<\/span>)<\/span>\r\n    go<\/span> concreteCrawl<\/span>(<\/span>url<\/span>,<\/span> depth<\/span>)<\/span>\r\n    return<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n    siteMap<\/span> :=<\/span> safeSiteMap<\/span>{<\/span>crawledMap<\/span>:<\/span> make<\/span>(<\/span>map<\/span>[<\/span>string<\/span>]<\/span>string<\/span>)}<\/span>\r\n    var<\/span> wg<\/span> sync<\/span>.<\/span>WaitGroup<\/span>\r\n    wg<\/span>.<\/span>Add<\/span>(<\/span>1<\/span>)<\/span>\r\n    go<\/span> Crawl<\/span>(<\/span>\"https:\/\/golang.org\/\"<\/span>,<\/span> 4<\/span>,<\/span> fetcher<\/span>,<\/span> siteMap<\/span>,<\/span> &<\/span>wg<\/span>)<\/span>\r\n    wg<\/span>.<\/span>Wait<\/span>()<\/span>\r\n    for<\/span> url<\/span>,<\/span> body<\/span> :=<\/span> range<\/span> siteMap<\/span>.<\/span>crawledMap<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>\"  \"<\/span> +<\/span> url<\/span> +<\/span> \": \"<\/span> +<\/span> body<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n\/\/ fakeFetcher is Fetcher that returns canned results.<\/span>\r\ntype<\/span> fakeFetcher<\/span> map<\/span>[<\/span>string<\/span>]<\/span>*<\/span>fakeResult<\/span>\r\n\r\ntype<\/span> fakeResult<\/span> struct<\/span> {<\/span>\r\n    body<\/span> string<\/span>\r\n    urls<\/span> []<\/span>string<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> (<\/span>f<\/span> fakeFetcher<\/span>)<\/span> Fetch<\/span>(<\/span>url<\/span> string<\/span>)<\/span> (<\/span>string<\/span>,<\/span> []<\/span>string<\/span>,<\/span> error<\/span>)<\/span> {<\/span>\r\n    if<\/span> res<\/span>,<\/span> ok<\/span> :=<\/span> f<\/span>[<\/span>url<\/span>];<\/span> ok<\/span> {<\/span>\r\n        return<\/span> res<\/span>.<\/span>body<\/span>,<\/span> res<\/span>.<\/span>urls<\/span>,<\/span> nil<\/span>\r\n    }<\/span>\r\n    return<\/span> \"\"<\/span>,<\/span> nil<\/span>,<\/span> fmt<\/span>.<\/span>Errorf<\/span>(<\/span>\"not found: %s\"<\/span>,<\/span> url<\/span>)<\/span>\r\n}<\/span>\r\n\r\n\r\n\/\/ fetcher is a populated fakeFetcher.<\/span>\r\nvar<\/span> fetcher<\/span> =<\/span> fakeFetcher<\/span>{<\/span>\r\n    \"https:\/\/golang.org\/\"<\/span>:<\/span> &<\/span>fakeResult<\/span>{<\/span>\r\n        \"The Go Programming Language\"<\/span>,<\/span>\r\n        []<\/span>string<\/span>{<\/span>\r\n            \"https:\/\/golang.org\/pkg\/\"<\/span>,<\/span>\r\n            \"https:\/\/golang.org\/cmd\/\"<\/span>,<\/span>\r\n        },<\/span>\r\n    },<\/span>\r\n    \"https:\/\/golang.org\/pkg\/\"<\/span>:<\/span> &<\/span>fakeResult<\/span>{<\/span>\r\n        \"Packages\"<\/span>,<\/span>\r\n        []<\/span>string<\/span>{<\/span>\r\n            \"https:\/\/golang.org\/\"<\/span>,<\/span>\r\n            \"https:\/\/golang.org\/cmd\/\"<\/span>,<\/span>\r\n            \"https:\/\/golang.org\/pkg\/fmt\/\"<\/span>,<\/span>\r\n            \"https:\/\/golang.org\/pkg\/os\/\"<\/span>,<\/span>\r\n        },<\/span>\r\n    },<\/span>\r\n    \"https:\/\/golang.org\/pkg\/fmt\/\"<\/span>:<\/span> &<\/span>fakeResult<\/span>{<\/span>\r\n        \"Package fmt\"<\/span>,<\/span>\r\n        []<\/span>string<\/span>{<\/span>\r\n            \"https:\/\/golang.org\/\"<\/span>,<\/span>\r\n            \"https:\/\/golang.org\/pkg\/\"<\/span>,<\/span>\r\n        },<\/span>\r\n    },<\/span>\r\n    \"https:\/\/golang.org\/pkg\/os\/\"<\/span>:<\/span> &<\/span>fakeResult<\/span>{<\/span>\r\n        \"Package os\"<\/span>,<\/span>\r\n        []<\/span>string<\/span>{<\/span>\r\n            \"https:\/\/golang.org\/\"<\/span>,<\/span>\r\n            \"https:\/\/golang.org\/pkg\/\"<\/span>,<\/span>\r\n        },<\/span>\r\n    },<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4ee5\u4e0b\u662f\u5bf9”\u611f\u89e6”\u7684\u4e2d\u6587\u672c\u5730\u5316\u6539\u5199\uff1a<\/h1>\n
\u89e6\u52a8\u5fc3\u7075<\/p>\n
\u867d\u7136\u5b83\u5177\u5907\u4e86\u65b0\u9896\u7684\u529f\u80fd\uff0c\u4f46\u4ecd\u7136\u80fd\u63d0\u9ad8\u6267\u884c\u901f\u5ea6\uff0c\u53ef\u4ee5\u611f\u53d7\u5230\u4e00\u4e9b\u7c7b\u4f3cC\u8bed\u8a00\u7684\u5473\u9053\u3002
\n\u7ecf\u8fc7\u5927\u7ea65\u5c0f\u65f6\u7684\u5b66\u4e60\uff0c\u6211\u80fd\u611f\u53d7\u5230\u5b83\u7684\u6f5c\u529b\uff0c\u4f46\u4e0d\u6e05\u695a\u5176\u751f\u6001\u7cfb\u7edf\u7684\u72b6\u51b5\uff0c\u6240\u4ee5\u65e0\u6cd5\u786e\u5b9a\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u4f1a\u6709\u591a\u5c11\u4fbf\u5229\u3002
\n\u7136\u800c\uff0c\u6211\u8ba4\u4e3a\u4e0eC++\u76f8\u6bd4\uff0c\u5b83\u4f3c\u4e4e\u4e0d\u5bb9\u6613\u51fa\u73b0\u6545\u969c\uff0c\u6240\u4ee5\u5982\u679c\u672a\u6765\u6709\u5404\u79cd\u9879\u76ee\u91c7\u7528Go\u8bed\u8a00\uff0c\u90a3\u5c06\u662f\u5e78\u798f\u7684\u4e8b\u60c5\u3002\u52a0\u6cb9\u4f1f\u5927\u7684\u4eba\uff0c\u52a0\u6cb9\u5d4c\u5165\u5f0f\u5f00\u53d1\u7b49\u5176\u4ed6\u9886\u57df\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u8a00 \u56e0\u4e3a\u611f\u5192\u4e86\u800c\u8bf7\u5047\u4f11\u606f\uff0c\u4e8e\u662f\u6211\u51b3\u5b9a\u5229\u7528\u8fd9\u4e2a\u673a\u4f1a\u5b66\u4e60\u4e00\u76f4\u4ee5\u6765\u8ba9\u6211\u597d\u5947\u7684Go\u8bed\u8a00\uff0c\u5e76\u5f00\u59cb\u5728\u4e0b\u9762\u7684\u7f51\u7ad9\u8fdb\u884c\u5b66\u4e60\uff1a […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44435","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nGo\u4e0e\u5176\u4ed6\u8bed\u8a00\u7684\u4e0d\u540c\u4e4b\u5904\u662f\u4ec0\u4e48\uff1f - 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\/go\u4e0e\u5176\u4ed6\u8bed\u8a00\u7684\u4e0d\u540c\u4e4b\u5904\u662f\u4ec0\u4e48\uff1f\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Go\u4e0e\u5176\u4ed6\u8bed\u8a00\u7684\u4e0d\u540c\u4e4b\u5904\u662f\u4ec0\u4e48\uff1f\" \/>\n<meta property=\"og:description\" content=\"\u524d\u8a00 \u56e0\u4e3a\u611f\u5192\u4e86\u800c\u8bf7\u5047\u4f11\u606f\uff0c\u4e8e\u662f\u6211\u51b3\u5b9a\u5229\u7528\u8fd9\u4e2a\u673a\u4f1a\u5b66\u4e60\u4e00\u76f4\u4ee5\u6765\u8ba9\u6211\u597d\u5947\u7684Go\u8bed\u8a00\uff0c\u5e76\u5f00\u59cb\u5728\u4e0b\u9762\u7684\u7f51\u7ad9\u8fdb\u884c\u5b66\u4e60\uff1a […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/go\u4e0e\u5176\u4ed6\u8bed\u8a00\u7684\u4e0d\u540c\u4e4b\u5904\u662f\u4ec0\u4e48\uff1f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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