/
rss.go
144 lines (121 loc) · 3.17 KB
/
rss.go
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package blog
import (
"context"
"fmt"
"os"
"strings"
"github.com/Laisky/errors/v2"
utils "github.com/Laisky/go-utils/v4"
glog "github.com/Laisky/go-utils/v4/log"
"github.com/Laisky/zap"
"github.com/aws/aws-sdk-go-v2/aws"
s3lib "github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/gorilla/feeds"
"github.com/Laisky/go-ramjet/library/log"
"github.com/Laisky/go-ramjet/library/s3"
)
// RssWorker rss worker
type RssWorker struct {
logger glog.Logger
feed *feeds.Feed
db *Blog
}
// NewRssWorker create rss worker
func NewRssWorker(blogdb *Blog) (*RssWorker, error) {
w := &RssWorker{
logger: log.Logger.Named("rss"),
db: blogdb,
}
return w, nil
}
type rssCfg struct {
title,
link,
authorName,
authorEmail string
}
// GenerateRSS scan all posts and generate rss
func (w *RssWorker) GenerateRSS(ctx context.Context, rsscfg *rssCfg) (err error) {
log.Logger.Info("generateRSS")
iter, err := w.db.GetPostIter(ctx)
if err != nil {
return errors.Wrap(err, "get post iter")
}
defer iter.Close(ctx) // nolint: errcheck
w.feed = &feeds.Feed{
Title: rsscfg.title,
Link: &feeds.Link{Href: rsscfg.link},
Author: &feeds.Author{
Name: rsscfg.authorName,
Email: rsscfg.authorEmail,
},
Created: utils.Clock.GetUTCNow(),
}
w.feed.Items = []*feeds.Item{}
for iter.Next(ctx) {
p := &Post{}
if err = iter.Decode(p); err != nil {
return errors.Wrap(err, "decode post")
}
w.feed.Items = append(w.feed.Items, &feeds.Item{
Title: p.Title,
Link: &feeds.Link{Href: rsscfg.link + "p/" + p.Name + "/"},
Id: rsscfg.link + "p/" + p.Name + "/",
Content: p.Cnt,
Author: &feeds.Author{
Name: fmt.Sprintf("%v(%v)", rsscfg.authorEmail, rsscfg.authorName),
},
Created: p.CreatedAt,
})
}
return nil
}
// Write2File write rss to file
func (w *RssWorker) Write2File(fpath string) (err error) {
logger := w.logger.Named("file")
logger.Info("run Write2File", zap.String("fpath", fpath))
fp, err := os.CreateTemp("", "*")
if err != nil {
return errors.Wrap(err, "create temp file")
}
if err = w.feed.WriteRss(fp); err != nil {
return errors.Wrap(err, "write rss")
}
if err = fp.Close(); err != nil {
return errors.Wrap(err, "close file")
}
if err = os.Rename(fp.Name(), fpath); err != nil {
return errors.Wrap(err, "rename file")
}
logger.Info("write rss to file", zap.String("fpath", fpath))
return nil
}
// Write2S3 write rss to s3
func (w *RssWorker) Write2S3(ctx context.Context,
endpoint,
accessKey,
accessSecret,
bucket,
objKey string,
) error {
logger := w.logger.Named("s3")
logger.Info("run Write2File", zap.String("s3", endpoint))
s3cli, err := s3.NewClient(ctx, endpoint, accessKey, accessSecret)
if err != nil {
return errors.Wrap(err, "new s3 client")
}
payload, err := w.feed.ToRss()
if err != nil {
return errors.Wrap(err, "to rss")
}
if _, err = s3cli.PutObject(ctx, &s3lib.PutObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(objKey),
Body: strings.NewReader(payload),
ContentType: aws.String("application/rss+xml"),
}); err != nil {
return errors.Wrapf(err, "put object %v", objKey)
}
logger.Info("write rss to s3", zap.String("s3", endpoint))
return nil
}