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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package flyscrape
import (
"crypto/tls"
"io"
"net/http"
"net/url"
"github.com/cornelk/hashmap"
)
const userAgent = "flyscrape/0.1"
func ProxiedFetch(proxyURL string) FetchFunc {
pu, err := url.Parse(proxyURL)
if err != nil {
panic("invalid proxy url")
}
client := http.Client{
Transport: &http.Transport{
Proxy: http.ProxyURL(pu),
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
},
}
return func(url string) (string, error) {
resp, err := client.Get(url)
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return "", err
}
html := string(body)
return html, nil
}
}
func CachedFetch(fetch FetchFunc) FetchFunc {
cache := hashmap.New[string, string]()
return func(url string) (string, error) {
if html, ok := cache.Get(url); ok {
return html, nil
}
html, err := fetch(url)
if err != nil {
return "", err
}
cache.Set(url, html)
return html, nil
}
}
func Fetch() FetchFunc {
return func(url string) (string, error) {
req, err := http.NewRequest(http.MethodGet, url, nil)
if err != nil {
return "", err
}
req.Header.Set("User-Agent", userAgent)
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return "", err
}
html := string(body)
return html, nil
}
}
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