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@ -41,7 +41,7 @@ The Go Programming Language
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$ ./title1 https://golang.org/doc/effective_go.html
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Effective Go - The Go Programming Language
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$ ./title1 https://golang.org/doc/gopher/frontpage.png
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title: https://golang.org/doc/gopher/frontpage.png has type image/png, not text/html
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title1: https://golang.org/doc/gopher/frontpage.png has type image/png, not text/html
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```
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resp.Body.close调用了多次,这是为了确保title在所有执行路径下(即使函数运行失败)都关闭了网络连接。随着函数变得复杂,需要处理的错误也变多,维护清理逻辑变得越来越困难。而Go语言独有的defer机制可以让事情变得简单。
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