74 lines
1.7 KiB
Go
74 lines
1.7 KiB
Go
package internal
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import (
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"errors"
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"net"
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"net/http"
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"net/url"
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"time"
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)
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var (
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// ErrNoCookieJar is the error type for missing cookie jar
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ErrNoCookieJar = errors.New("cookie jar is not available")
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)
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// Client is a small wrapper around *http.Client to provide new methods.
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type Client struct {
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*http.Client
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}
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// NewClient creates http.Client with modified values for typical web scraper
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func NewClient() *Client {
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client := &http.Client{
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Transport: &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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DialContext: (&net.Dialer{
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Timeout: 30 * time.Second,
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KeepAlive: 30 * time.Second,
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DualStack: true,
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}).DialContext,
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MaxIdleConns: 0, // Default: 100
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MaxIdleConnsPerHost: 1000, // Default: 2
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IdleConnTimeout: 90 * time.Second,
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TLSHandshakeTimeout: 10 * time.Second,
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ExpectContinueTimeout: 1 * time.Second,
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},
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Timeout: time.Second * 180, // Google's timeout
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}
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return &Client{Client: client}
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}
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// SetCookies handles the receipt of the cookies in a reply for the given URL
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func (c *Client) SetCookies(URL string, cookies []*http.Cookie) error {
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if c.Jar == nil {
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return ErrNoCookieJar
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}
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u, err := url.Parse(URL)
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if err != nil {
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return err
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}
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c.Jar.SetCookies(u, cookies)
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return nil
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}
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// Cookies returns the cookies to send in a request for the given URL.
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func (c *Client) Cookies(URL string) []*http.Cookie {
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if c.Jar == nil {
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return nil
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}
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parsedURL, err := url.Parse(URL)
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if err != nil {
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return nil
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}
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return c.Jar.Cookies(parsedURL)
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}
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// SetDefaultHeader sets header if not exists before
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func SetDefaultHeader(header http.Header, key string, value string) http.Header {
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if header.Get(key) == "" {
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header.Set(key, value)
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}
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return header
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}
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