在Go中作为字符串访问HTTP响应 [英] Access HTTP response as string in Go

问题描述

我想解析一个Web请求的响应，但是我很难以字符串的形式访问它。

I'd like to parse the response of a web request, but I'm getting trouble accessing it as string.

func main() {
    resp, err := http.Get("http://google.hu/")
    if err != nil {
        // handle error
    }
    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)

    ioutil.WriteFile("dump", body, 0600)

    for i:= 0; i < len(body); i++ {
        fmt.Println( body[i] ) // This logs uint8 and prints numbers
    }

    fmt.Println( reflect.TypeOf(body) )
    fmt.Println("done")
}

如何访问响应串？ ioutil.WriteFile 正确写入对文件的响应。

How can I access the response as string? ioutil.WriteFile writes correctly the response to a file.

我已经检查过软件包引用，但并不真正有用。

I've already checked the package reference but it's not really helpful.

推荐答案

bs：= string（body）应该足以给你一个字符串。

bs := string(body) should be enough to give you a string.

从那里，您可以将其用作常规字符串。

From there, you can use it as a regular string.

有点像 in this thread ：

var client http.Client
resp, err := client.Get(url)
if err != nil {
    // err
}
defer resp.Body.Close()

if resp.StatusCode == http.StatusOK {
    bodyBytes, err2 := ioutil.ReadAll(resp.Body)
    bodyString := string(bodyBytes)
}

另见 GoByExample 。

如下所示（并在 zzn 的 answer ），这是一个 转换 （请参阅规范）。

请参阅 []字节（字符串）？< a>（反向问题，但适用相同结论） zzzz 提到：

As commented below (and in zzn's answer), this is a conversion (see spec).
See "How expensive is []byte(string)?" (reverse problem, but the same conclusion apply) where zzzz mentioned:

某些转换与转换相同，例如 uint（myIntvar），它只是重新解释位。

Some conversions are the same as a cast, like uint(myIntvar), which just reinterprets the bits in place.

索尼娅补充道：

Sonia adds:

从字节片段中创建一个字符串，绝对需要在堆上分配字符串。不变性属性强制执行此操作。

有时，您可以使用[]字节做尽可能多的工作来优化，然后在最后创建一个字符串。 bytes.Buffer 类型通常有用。

Making a string out of a byte slice, definitely involves allocating the string on the heap. The immutability property forces this.
Sometimes you can optimize by doing as much work as possible with []byte and then creating a string at the end. The bytes.Buffer type is often useful.

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