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helper.go
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helper.go
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/*
Nging is a toolbox for webmasters
Copyright (C) 2018-present Wenhui Shen <swh@admpub.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package phantomjsfetcher
import (
phantomjs "github.com/admpub/go-phantomjs-fetcher"
"github.com/admpub/marmot/miner"
)
var (
DefaultPort = 20180
defaultFetcher *phantomjs.Fetcher
)
func Fetch(pageURL string, jscode string, headers map[string]string) (*phantomjs.Response, error) {
err := InitServer()
if err != nil {
return nil, err
}
fetcher := defaultFetcher
if headers == nil {
headers = make(map[string]string)
if _, ok := headers["User-Agent"]; !ok {
headers["User-Agent"] = miner.RandomUserAgent()
}
}
options := *fetcher.DefaultOption
options.Headers = headers
//jscode := "function() {s=document.documentElement.outerHTML;document.write('<body></body>');document.body.innerText=s;}"
jsRunAt := phantomjs.RUN_AT_DOC_END
resp, err := fetcher.GetWithOption(pageURL, jscode, jsRunAt, &options)
return resp, err
}
func CloseServer() error {
if defaultFetcher == nil {
return nil
}
defaultFetcher.ShutDownPhantomJSServer()
return nil
}
func InitServer() error {
fetcher, err := phantomjs.NewFetcher(DefaultPort, nil)
if err != nil {
return err
}
defaultFetcher = fetcher
return nil
}