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Update ch5-08.md

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Yue Chen 2019-12-10 16:05:07 +08:00 committed by GitHub
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@ -41,7 +41,7 @@ The Go Programming Language
$ ./title1 https://golang.org/doc/effective_go.html
Effective Go - The Go Programming Language
$ ./title1 https://golang.org/doc/gopher/frontpage.png
title: https://golang.org/doc/gopher/frontpage.png has type image/png, not text/html
title1: https://golang.org/doc/gopher/frontpage.png has type image/png, not text/html
```
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。