Golang模拟网页请求

最新推荐文章于 2025-06-24 14:00:00 发布

Pasiyu

最新推荐文章于 2025-06-24 14:00:00 发布

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分类专栏： golang

本文链接：https://blog.youkuaiyun.com/Pasiyu/article/details/89645651

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博客内容提及无编码，但无更多关键信息。

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func httpRequest(url string) (*http.Response, error) {
	request, err := http.NewRequest("GET", url, nil)
	if err != nil {
		return nil, err
	}
	// 设置请求投
	request.Header.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8")
	request.Header.Add("Accept-Language", "zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3")
	request.Header.Add("Connection", "keep-alive")
	request.Header.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36")

	client := http.Client{}
	// Do sends an HTTP request and returns an HTTP response
	// 发起一个HTTP请求，返回一个HTTP响应
	return client.Do(request)
}


// 根据URL提取
func Fetch(url string) ([]byte, error) {
	resp, err := httpRequest(url)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("wrong status code: %d of %s", resp.StatusCode, url)
	}
	r := bufio.NewReader(resp.Body)
	e := determineEncoding(r)
	utf8Reader := transform.NewReader(r,  e.NewDecoder())
	return ioutil.ReadAll(utf8Reader)
}

// 编码识别
func determineEncoding(
	r *bufio.Reader) encoding.Encoding{
	bytes, err:=r.Peek(1024)
	if err!=nil {
		log.Printf("fetch error : %v\n", err )
		// 如果没有识别到，返回一个UTF-8(默认)
		return unicode.UTF8
	}
	e, _, _ := charset.DetermineEncoding(
		bytes, "")
	return e
}

无编码

func httpRequest(url string) (*http.Response, error) {
	request, err := http.NewRequest("GET", url, nil)
	if err != nil {
		return nil, err
	}
	request.Header.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8")
	request.Header.Add("Accept-Language", "zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3")
	request.Header.Add("Connection", "keep-alive")
	request.Header.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36")

	client := http.Client{}
	return client.Do(request)
}
// 根据指定的URL进行数据抓取
func Fetch(url string)([]byte,error)  {
	resp, err := httpRequest(url)
	if err != nil{
		return nil,err
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("wrong status code: %d of %s", resp.StatusCode, url)
	}
	return ioutil.ReadAll(resp.Body)

}