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rss_1.0.go
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rss_1.0.go
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package rss
import (
"bytes"
"encoding/xml"
"fmt"
"sort"
"strings"
"time"
)
func parseRSS1(data []byte) (*Feed, error) {
warnings := false
feed := rss1_0Feed{}
p := xml.NewDecoder(bytes.NewReader(data))
p.CharsetReader = charsetReader
err := p.Decode(&feed)
if err != nil {
return nil, err
}
if feed.Channel == nil {
return nil, fmt.Errorf("no channel found in %q", string(data))
}
channel := feed.Channel
out := new(Feed)
out.Title = channel.Title
out.Description = channel.Description
out.Link = channel.Link
out.Image = channel.Image.Image()
if channel.MinsToLive != 0 {
sort.Ints(channel.SkipHours)
next := time.Now().Add(time.Duration(channel.MinsToLive) * time.Minute)
for _, hour := range channel.SkipHours {
if hour == next.Hour() {
next.Add(time.Duration(60-next.Minute()) * time.Minute)
}
}
trying := true
for trying {
trying = false
for _, day := range channel.SkipDays {
if strings.Title(day) == next.Weekday().String() {
next.Add(time.Duration(24-next.Hour()) * time.Hour)
trying = true
break
}
}
}
out.Refresh = next
}
if out.Refresh.IsZero() {
out.Refresh = time.Now().Add(10 * time.Minute)
}
out.Items = make([]*Item, 0, len(feed.Items))
out.ItemMap = make(map[string]struct{})
// Process items.
for _, item := range feed.Items {
if item.ID == "" {
if item.Link == "" {
if debug {
fmt.Printf("[w] Item %q has no ID or link and will be ignored.\n", item.Title)
fmt.Printf("[w] %#v\n", item)
}
warnings = true
continue
}
item.ID = item.Link
}
// Skip items already known.
if _, ok := out.ItemMap[item.ID]; ok {
continue
}
next := new(Item)
next.Title = item.Title
next.Summary = item.Description
next.Content = item.Content
next.Link = item.Link
if item.Date != "" {
next.Date, err = parseTime(item.Date)
if err == nil {
next.DateValid = true
}
} else if item.PubDate != "" {
next.Date, err = parseTime(item.PubDate)
if err == nil {
next.DateValid = true
}
}
next.ID = item.ID
if len(item.Enclosures) > 0 {
next.Enclosures = make([]*Enclosure, len(item.Enclosures))
for i := range item.Enclosures {
next.Enclosures[i] = item.Enclosures[i].Enclosure()
}
}
next.Read = false
out.Items = append(out.Items, next)
out.ItemMap[next.ID] = struct{}{}
out.Unread++
}
if warnings && debug {
fmt.Printf("[i] Encountered warnings:\n%s\n", data)
}
return out, nil
}
type rss1_0Feed struct {
XMLName xml.Name `xml:"RDF"`
Channel *rss1_0Channel `xml:"channel"`
Items []rss1_0Item `xml:"item"`
}
type rss1_0Channel struct {
XMLName xml.Name `xml:"channel"`
Title string `xml:"title"`
Description string `xml:"description"`
Link string `xml:"link"`
Image rss1_0Image `xml:"image"`
MinsToLive int `xml:"ttl"`
SkipHours []int `xml:"skipHours>hour"`
SkipDays []string `xml:"skipDays>day"`
}
type rss1_0Item struct {
XMLName xml.Name `xml:"item"`
Title string `xml:"title"`
Description string `xml:"description"`
Content string `xml:"encoded"`
Link string `xml:"link"`
PubDate string `xml:"pubDate"`
Date string `xml:"date"`
DateValid bool
ID string `xml:"guid"`
Enclosures []rss1_0Enclosure `xml:"enclosure"`
}
type rss1_0Enclosure struct {
XMLName xml.Name `xml:"enclosure"`
URL string `xml:"resource,attr"`
Type string `xml:"type,attr"`
Length uint `xml:"length,attr"`
}
func (r *rss1_0Enclosure) Enclosure() *Enclosure {
out := new(Enclosure)
out.URL = r.URL
out.Type = r.Type
out.Length = r.Length
return out
}
type rss1_0Image struct {
XMLName xml.Name `xml:"image"`
Title string `xml:"title"`
URL string `xml:"url"`
Height int `xml:"height"`
Width int `xml:"width"`
}
func (i *rss1_0Image) Image() *Image {
out := new(Image)
out.Title = i.Title
out.URL = i.URL
out.Height = uint32(i.Height)
out.Width = uint32(i.Width)
return out
}