/
fetcher.go
55 lines (43 loc) · 931 Bytes
/
fetcher.go
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package main
import (
"errors"
"log"
"github.com/mmcdole/gofeed"
)
type feedResult struct {
feed *gofeed.Feed
err error
}
type Fetcher struct {
parser *gofeed.Parser
}
func NewFetcher() *Fetcher {
return &Fetcher{
parser: gofeed.NewParser(),
}
}
func (f *Fetcher) FetchFeeds(urls map[string]struct{}) []*gofeed.Feed {
results := make(chan feedResult, len(urls))
for u := range urls {
go f.fetchFeed(u, results)
}
var feeds []*gofeed.Feed
for i := 0; i < len(urls); i++ {
res := <-results
if res.err != nil {
log.Printf("Failed to fetch feed: %v", res.err)
continue
}
feeds = append(feeds, res.feed)
}
return feeds
}
func (f *Fetcher) fetchFeed(url string, results chan feedResult) {
feed, err := f.parser.ParseURL(url)
if err != nil {
err = errors.New("failed to parse " + url + ": " + err.Error())
results <- feedResult{nil, err}
return
}
results <- feedResult{feed, nil}
}