{"id":42977,"date":"2024-12-01T08:29:39","date_gmt":"2024-12-01T00:29:39","guid":{"rendered":"https:\/\/fwq.ai\/blog\/42977\/"},"modified":"2024-12-01T08:29:39","modified_gmt":"2024-12-01T00:29:39","slug":"%e4%bb%8e%e6%96%87%e4%bb%b6%e8%af%bb%e5%8f%96%e6%95%b0%e6%8d%ae%e5%b9%b6%e5%90%8c%e6%97%b6%e5%8f%91%e9%80%81%e6%95%b0%e6%8d%ae%e6%97%b6%e5%87%ba%e7%8e%b0%e6%95%b0%e6%8d%ae%e7%ab%9e%e4%ba%89%e9%97%ae","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/42977\/","title":{"rendered":"\u4ece\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u5e76\u540c\u65f6\u53d1\u9001\u6570\u636e\u65f6\u51fa\u73b0\u6570\u636e\u7ade\u4e89\u95ee\u9898"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u4ece\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u5e76\u540c\u65f6\u53d1\u9001\u6570\u636e\u65f6\u51fa\u73b0\u6570\u636e\u7ade\u4e89\u95ee\u9898<\/span><\/p>\n

\u4ece\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u5e76\u540c\u65f6\u53d1\u9001\u6570\u636e\u65f6\u51fa\u73b0\u6570\u636e\u7ade\u4e89\u95ee\u9898<\/h1>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-27 23:27:34<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4f60\u5728\u5b66\u4e60Golang<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587\u300a\u4ece\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u5e76\u540c\u65f6\u53d1\u9001\u6570\u636e\u65f6\u51fa\u73b0\u6570\u636e\u7ade\u4e89\u95ee\u9898\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230<\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u6b63\u5728\u5c1d\u8bd5\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u5e76\u7acb\u5373\u5c06\u8bfb\u53d6\u7684\u5757\u53d1\u9001\u7ed9\u5b83\uff0c\u800c\u65e0\u9700\u7b49\u5f85\u5176\u4ed6 goroutine \u5b8c\u6210\u6587\u4ef6\u8bfb\u53d6\u3002\u6211\u6709\u4e24\u4e2a\u529f\u80fd<\/p>\n

func readfile(stream chan []byte, stop chan bool) {\n    file.lock()\n    defer file.unlock()\n    dir, _ := os.getwd()\n    file, _ := os.open(dir + \"\/somefile.json\")\n    chunk := make([]byte, 512*4)\n    for {\n        bytesread, err := file.read(chunk)\n        if err == io.eof {\n            break\n        }\n        if err != nil {\n            panic(err)\n            break\n        }\n        stream <- chunk[:bytesread]\n    }\n\n    stop <- true\n}<\/pre>\n
\u7b2c\u4e00\u4e2a\u8d1f\u8d23\u8bfb\u53d6\u6587\u4ef6\u5e76\u5c06\u6570\u636e\u5757\u53d1\u9001\u5230\u4ece\u5176\u4ed6\u51fd\u6570\u63a5\u6536\u7684\u201c\u6d41\u201d\u901a\u9053<\/p>\n
func SteamFile() {\n    stream := make(chan []byte)\n    stop := make(chan bool)\n\n    go ReadFile(stream, stop)\n\nL:\n    for {\n        select {\n        case data := <-stream:\n            \/\/want to send data chunk by socket here\n            fmt.Println(data)\n        case <-stop:\n            break L\n        }\n    }\n}<\/pre>\n
\u7b2c\u4e8c\u4e2a\u51fd\u6570\u521b\u5efa 2 \u4e2a\u901a\u9053\uff0c\u5c06\u5b83\u4eec\u53d1\u9001\u5230\u7b2c\u4e00\u4e2a\u51fd\u6570\u5e76\u5f00\u59cb\u76d1\u542c\u901a\u9053\u3002 \u95ee\u9898\u662f\u6709\u65f6 data := <-stream<\/code> \u4e22\u5931\u3002\u4f8b\u5982\uff0c\u6211\u6ca1\u6709\u6536\u5230\u6587\u4ef6\u7684\u7b2c\u4e00\u90e8\u5206\uff0c\u4f46\u6536\u5230\u4e86\u6240\u6709\u5176\u4ed6\u90e8\u5206\u3002\u5f53\u6211\u4f7f\u7528 -race \u6807\u5fd7\u8fd0\u884c\u7a0b\u5e8f\u65f6\uff0c\u5b83\u8868\u660e\u5b58\u5728\u6570\u636e\u7ade\u4e89\uff0c\u5e76\u4e14\u4e24\u4e2a goroutine \u540c\u65f6\u5199\u5165\u901a\u9053\u548c\u4ece\u901a\u9053\u8bfb\u53d6\u3002\u8bf4\u5b9e\u8bdd\uff0c\u6211\u8ba4\u4e3a\u8fd9\u662f\u4f7f\u7528\u6e20\u9053\u7684\u6b63\u5e38\u65b9\u5f0f\uff0c\u4f46\u73b0\u5728\u6211\u53d1\u73b0\u5b83\u5e26\u6765\u4e86\u66f4\u591a\u95ee\u9898\u3002 \u6709\u4eba\u53ef\u4ee5\u5e2e\u6211\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5417\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u5f53\u6211\u4f7f\u7528 -race \u6807\u5fd7\u8fd0\u884c\u7a0b\u5e8f\u65f6\uff0c\u5b83\u8868\u660e\u5b58\u5728\u6570\u636e\u7ade\u4e89\uff0c\u5e76\u4e14\u4e24\u4e2a goroutine \u540c\u65f6\u5199\u5165\u901a\u9053\u548c\u4ece\u901a\u9053\u8bfb\u53d6\u3002\u8bf4\u5b9e\u8bdd\uff0c\u6211\u8ba4\u4e3a\u8fd9\u662f\u4f7f\u7528\u6e20\u9053\u7684\u6b63\u5e38\u65b9\u5f0f\u3002<\/p>\n
\u786e\u5b9e\u5982\u6b64\uff0c\u800c\u4e14\u60a8\u51e0\u4e4e\u80af\u5b9a\u8bef\u89e3\u4e86\u7ade\u4e89\u68c0\u6d4b\u5668\u7684\u8f93\u51fa\u3002<\/p>\n
\u60a8\u6b63\u5728 readfile \u4e2d\u5171\u4eab\u5207\u7247\uff08\u56e0\u6b64\u5b83\u662f\u5e95\u5c42\u6570\u7ec4\uff09\uff0c\u56e0\u6b64\u5f53\u5728 steamfile \u4e2d\u8bfb\u53d6\u6570\u636e\u65f6\uff0c\u6570\u636e\u4f1a\u88ab\u8986\u76d6\u5728 readfile \u4e2d [\u539f\u6587\u5982\u6b64]\u3002\u867d\u7136\u8fd9\u4e0d\u5e94\u8be5\u89e6\u53d1\u7ade\u4e89\u68c0\u6d4b\u5668\uff0c\u4f46\u8fd9\u7edd\u5bf9\u662f\u4e00\u4e2a\u9519\u8bef\u3002\u4e3a\u6bcf\u4e2a read \u8c03\u7528\u521b\u5efa\u4e00\u4e2a\u65b0\u5207\u7247\uff1a<\/p>\n
func ReadFile(stream chan []byte, stop chan bool) {\n      file.Lock()\n      defer file.Unlock()\n      dir, _ := os.Getwd()\n      file, _ := os.Open(dir + \"\/someFile.json\")\n-     chunk := make([]byte, 512*4)\n      for {\n+         chunk := make([]byte, 512*4)\n          bytesRead, err := file.Read(chunk)<\/pre>\n
\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u4ece\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u5e76\u540c\u65f6\u53d1\u9001\u6570\u636e\u65f6\u51fa\u73b0\u6570\u636e\u7ade\u4e89\u95ee\u9898\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > > > \u4ece\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u5e76\u540c\u65f6\u53d1\u9001\u6570\u636e\u65f6\u51fa\u73b0\u6570\u636e\u7ade\u4e89\u95ee\u9898 \u4ece\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u5e76\u540c\u65f6\u53d1\u9001\u6570\u636e\u65f6\u51fa\u73b0\u6570\u636e\u7ade\u4e89\u95ee\u9898 \u6765\u6e90\uff1astackoverflow 2024-04-27 23:27:34 0\u6d4f\u89c8 \u6536\u85cf \u4f60\u5728\u5b66\u4e60Golang\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587\u300a\u4ece\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u5e76\u540c\u65f6\u53d1\u9001\u6570\u636e\u65f6\u51fa\u73b0\u6570\u636e\u7ade\u4e89\u95ee\u9898\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01 \u95ee\u9898\u5185\u5bb9 \u6211\u6b63\u5728\u5c1d\u8bd5\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u5e76\u7acb\u5373\u5c06\u8bfb\u53d6\u7684\u5757\u53d1\u9001\u7ed9\u5b83\uff0c\u800c\u65e0\u9700\u7b49\u5f85\u5176\u4ed6 goroutine \u5b8c\u6210\u6587\u4ef6\u8bfb\u53d6\u3002\u6211\u6709\u4e24\u4e2a\u529f\u80fd func readfile(stream chan []byte, stop chan bool) { file.lock() defer file.unlock() dir, _ := os.getwd() file, _ := os.open(dir + “\/somefile.json”) chunk := make([]byte, 512*4) for { bytesread, err := file.read(chunk) if err == io.eof { break } […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-42977","post","type-post","status-publish","format-standard","hentry","category-docker"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/42977","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=42977"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/42977\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=42977"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=42977"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=42977"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}