{"id":4166,"date":"2018-11-04T11:32:42","date_gmt":"2018-11-04T03:32:42","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=4166"},"modified":"2018-11-04T11:32:42","modified_gmt":"2018-11-04T03:32:42","slug":"go%e8%af%ad%e8%a8%80%e5%ad%a6%e4%b9%a016-%e5%a6%82%e4%bd%95%e6%a3%80%e6%b5%8b%e6%96%87%e4%bb%b6%e5%8f%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/4166.html","title":{"rendered":"Go\u8bed\u8a00\u5b66\u4e60#16-\u5982\u4f55\u68c0\u6d4b\u6587\u4ef6\u53d8\u5316"},"content":{"rendered":"

=Start=<\/p>\n

\u7f18\u7531\uff1a<\/h4>\n

\u4e4b\u524d\u5728Linux\u4e0b\u4f7f\u7528\u8fc7inotify-tools\u6765\u83b7\u77e5\u6587\u4ef6\u7684\u53d8\u5316\u60c5\u51b5\uff0c\u5728\u535a\u5ba2\u91cc\u4e5f\u8bb0\u5f55\u4e86\u51e0\u7bc7\u6587\u7ae0<\/a>\uff0c\u73b0\u5728\u5728\u5b66\u4e60Go \u8bed\u8a00\uff0c\u4e5f\u60f3\u4e86\u89e3\u4e00\u4e0b\u5728Go \u8bed\u8a00\u4e2d\u5982\u4f55\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\u3002<\/p>\n

\u6b63\u6587\uff1a<\/h4>\n
\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n

\u4e00\u4e2a\u8de8\u5e73\u53f0\u7684\u7b80\u5355\u7248\u5b9e\u73b0\uff0c\u6765\u81ea this.lau_<\/a>\uff1a<\/p>\n

package main\r\n\r\nimport (\r\n    \"fmt\"\r\n    \"os\"\r\n    \"time\"\r\n)\r\n\r\nfunc watchFile(filePath string) error {\r\n    initialStat, err := os.Stat(filePath)\r\n    if err != nil {\r\n        return err\r\n    }\r\n\r\n    for {\r\n        stat, err := os.Stat(filePath)\r\n        if err != nil {\r\n            return err\r\n        }\r\n\r\n        if stat.Size() != initialStat.Size() || stat.ModTime() != initialStat.ModTime() {\r\n            break\r\n        }\r\n\r\n        time.Sleep(1 * time.Second)\r\n    }\r\n\r\n    return nil\r\n}\r\n\r\nfunc main() {\r\n    doneChan := make(chan bool)\r\n\r\n    go func(doneChan chan bool) {\r\n        defer func() {\r\n            doneChan <- true\r\n        }()\r\n\r\n        err := watchFile(\"\/private\/tmp\/test\")\r\n        if err != nil {\r\n            fmt.Println(err)\r\n        }\r\n\r\n        fmt.Println(\"File has been changed\")\r\n    }(doneChan)\r\n\r\n    <-doneChan\r\n}<\/pre>\n
\n
\u4f7f\u7528\u00a0fsnotify \u5305\u7684\u5b98\u65b9\u7528\u4f8b\uff1a<\/p>\n
package main\r\n\r\nimport (\r\n    \"github.com\/fsnotify\/fsnotify\"\r\n    \"log\"\r\n)\r\n\r\nfunc ExampleNewWatcher() {\r\n    watcher, err := fsnotify.NewWatcher()\r\n    if err != nil {\r\n        log.Fatal(err)\r\n    }\r\n    defer watcher.Close()\r\n\r\n    done := make(chan bool)\r\n    go func() {\r\n        for {\r\n            select {\r\n            case event, ok := <-watcher.Events:\r\n                if !ok {\r\n                    return\r\n                }\r\n                log.Println(\"event:\", event)\r\n                if event.Op&fsnotify.Write == fsnotify.Write {\r\n                    log.Println(\"modified file:\", event.Name)\r\n                }\r\n            case err, ok := <-watcher.Errors:\r\n                if !ok {\r\n                    return\r\n                }\r\n                log.Println(\"error:\", err)\r\n            }\r\n        }\r\n    }()\r\n\r\n    err = watcher.Add(\"\/private\/tmp\/foo\")\r\n    if err != nil {\r\n        log.Fatal(err)\r\n    }\r\n    <-done\r\n}\r\n\r\nfunc main() {\r\n    ExampleNewWatcher()\r\n}<\/pre>\n
 <\/p>\n
\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n