{"id":207590,"date":"2025-07-08T13:01:05","date_gmt":"2025-07-08T05:01:05","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207590\/"},"modified":"2025-07-08T13:01:05","modified_gmt":"2025-07-08T05:01:05","slug":"%e6%97%a0%e6%b3%95%e4%bb%8e%e6%81%90%e6%85%8c%e4%b8%ad%e6%81%a2%e5%a4%8d-%e5%ae%8c%e5%85%a8%e8%b7%b3%e8%bf%87%e5%bb%b6%e8%bf%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207590\/","title":{"rendered":"\u65e0\u6cd5\u4ece\u6050\u614c\u4e2d\u6062\u590d – \u5b8c\u5168\u8df3\u8fc7\u5ef6\u8fdf"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u65e0\u6cd5\u4ece\u6050\u614c\u4e2d\u6062\u590d – \u5b8c\u5168\u8df3\u8fc7\u5ef6\u8fdf<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-23 20:00:34<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60Golang<\/span>\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587\u300a\u65e0\u6cd5\u4ece\u6050\u614c\u4e2d\u6062\u590d – \u5b8c\u5168\u8df3\u8fc7\u5ef6\u8fdf\u300b<\/span>\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0Golang<\/span>\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n

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

\u5f53\u4f7f\u7528 io.copy \u4e0e\u65e0\u6548\u7684\u7f16\u5199\u5668\u65f6\uff0c\u6211\u4f1a\u611f\u5230\u6050\u614c – \u8fd9\u662f\u9884\u6599\u4e4b\u4e2d\u7684\u3002\u4f46\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u6211\u65e0\u6cd5\u6062\u590d\u3002\u6211\u7684\u5ef6\u8fdf\u6062\u590d\u88ab\u5b8c\u5168\u7ed5\u8fc7\u4e86\u3002\u8fd9\u662f\u4ee3\u7801\uff1a<\/p>\n

package main\n\nimport (\n    \"context\"\n    \"fmt\"\n    \"io\"\n    \"log\"\n    \"os\"\n    \"runtime\"\n    \"runtime\/debug\"\n\n    \"cloud.google.com\/go\/storage\"\n)\n\nfunc main() {\n    var (\n        ctx      = context.background()\n        fromfile = \"blah.txt\"\n        bucket   = \"blah-bucket\"\n        path     = \"blah-path\"\n    )\n\n    defer func() {\n        if result := recover(); result != nil {\n            buf := make([]byte, 1<<16)\n            length := runtime.stack(buf, false)\n            log.fatalf(\"panic recover: %v\\nstack: \\n%s\", result, buf[:length])\n            debug.printstack()\n        }\n    }()\n\n    err := fakeupload(ctx, fromfile, bucket, path)\n    if err != nil {\n        fmt.println(err)\n    }\n\n    fmt.println(\"hello\")\n}\n\nfunc fakeupload(ctx context.context, fromfile, tobucket, topath string) (err error) {\n    var (\n        file   *os.file\n        client *storage.client\n        wc     *storage.writer\n    )\n\n    defer func() {\n        for _, c := range []io.closer{wc, file} {\n            if c != nil {\n                err = c.close()\n                if err != nil {\n                    return\n                }\n            }\n        }\n    }()\n\n    file, err = os.open(fromfile)\n    if err != nil {\n        err = fmt.errorf(\"problem opening file %v: %v\", fromfile, err)\n        return\n    }\n\n    wc = client.bucket(tobucket).object(topath).newwriter(ctx)\n\n    _, err = io.copy(wc, file) \/\/ the unrecoverable panic happens here\n\n    return\n}<\/pre>\n
\u6050\u614c\u662f\uff1a<\/p>\n
panic: runtime error: invalid memory address or nil pointer dereference\n[signal 0xc0000005 code=0x0 addr=0x0 pc=0x9e0fa8]\n\ngoroutine 21 [running]:\ncloud.google.com\/go\/storage.(*writer).open.func1(0xc000161200, 0xc0002721e0, 0xc000150388, 0xc000290e20, 0x1, 0x1)\n    c:\/users\/xxxx\/go\/pkg\/mod\/cloud.google.com\/go\/[email protected]\/writer.go:128 +0x248\ncreated by cloud.google.com\/go\/storage.(*writer).open\n    c:\/users\/xxxx\/go\/pkg\/mod\/cloud.google.com\/go\/[email protected]\/writer.go:118 +0x6ce\nprocess exiting with code: 0<\/pre>\n
module main\n\ngo 1.15\n\nrequire cloud.google.com\/go\/storage v1.14.0<\/pre>\n
go version go1.15.10 windows\/amd64<\/pre>\n
\u6700\u91cd\u8981\u7684\u662f\uff0c\u5982\u679c\u5b83\u5728\u5176\u4ed6\u5730\u65b9\u53d1\u751f\u6050\u614c\uff0c\u4f8b\u5982\u6211\u6307\u5411\u4e00\u4e2a\u65e0\u6548\u6587\u4ef6\uff0c\u5b83\u5c31\u4f1a\u53d1\u751f\u6050\u614c\uff0c\u5e76\u4e14\u5ef6\u8fdf\u6062\u590d\u4f1a\u6b63\u786e\u6355\u83b7\u5b83\u3002<\/p>\n
\u8fd9\u8ba9\u6211\u5f88\u56f0\u60d1\u3002\u6709\u4ec0\u4e48\u60f3\u6cd5\u5417\uff1f<\/p>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
\u6b63\u5982\u60a8\u5728\u4e0a\u9762\u7684\u8bc4\u8bba\u4e2d\u770b\u5230\u7684\u90a3\u6837\uff0c\u7b54\u6848\u662f cloud.google.com\/go\/storage<\/code> writer \u6b63\u5728\u521b\u5efa\u4e00\u4e2a goroutine\uff0c\u5e76\u5728\u5176\u4e2d\u5f15\u53d1\u6050\u614c\u3002 GO \u4e0d\u5141\u8bb8\u4f60\u4ece\u53e6\u4e00\u4e2a goroutine \u4e2d\u6062\u590d\u3002<\/p>\n
\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u65e0\u6cd5\u4ece\u6050\u614c\u4e2d\u6062\u590d – \u5b8c\u5168\u8df3\u8fc7\u5ef6\u8fdf\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03Golang\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207590","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207590","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207590"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207590\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207590"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207590"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}