GoBlog/feeds.go

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package main
import (
"net/http"
"strings"
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"time"
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"github.com/araddon/dateparse"
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"github.com/gorilla/feeds"
"go.goblog.app/app/pkgs/contenttype"
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)
type feedType string
const (
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noFeed feedType = ""
rssFeed feedType = "rss"
atomFeed feedType = "atom"
jsonFeed feedType = "json"
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feedAudioURL = "audio"
feedAudioType = "audiomime"
feedAudioLength = "audiolength"
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)
func (a *goBlog) generateFeed(blog string, f feedType, w http.ResponseWriter, r *http.Request, posts []*post, title string, description string) {
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now := time.Now()
if title == "" {
title = a.cfg.Blogs[blog].Title
}
if description == "" {
description = a.cfg.Blogs[blog].Description
}
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feed := &feeds.Feed{
Title: title,
Description: description,
Link: &feeds.Link{Href: a.getFullAddress(strings.TrimSuffix(r.URL.Path, "."+string(f)))},
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Created: now,
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Author: &feeds.Author{
Name: a.cfg.User.Name,
Email: a.cfg.User.Email,
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},
Image: &feeds.Image{
Url: a.cfg.User.Picture,
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},
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}
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for _, p := range posts {
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created, _ := dateparse.ParseLocal(p.Published)
updated, _ := dateparse.ParseLocal(p.Updated)
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var enc *feeds.Enclosure
if p.firstParameter(feedAudioURL) != "" {
enc = &feeds.Enclosure{
Url: p.firstParameter(feedAudioURL),
Type: p.firstParameter(feedAudioType),
Length: p.firstParameter(feedAudioLength),
}
}
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feed.Add(&feeds.Item{
Title: p.Title(),
Link: &feeds.Link{Href: a.fullPostURL(p)},
Description: a.postSummary(p),
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Id: p.Path,
Content: string(a.absolutePostHTML(p)),
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Created: created,
Updated: updated,
Enclosure: enc,
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})
}
var err error
var feedString, feedMediaType string
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switch f {
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case rssFeed:
feedMediaType = contenttype.RSS
feedString, err = feed.ToRss()
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case atomFeed:
feedMediaType = contenttype.ATOM
feedString, err = feed.ToAtom()
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case jsonFeed:
feedMediaType = contenttype.JSONFeed
feedString, err = feed.ToJSON()
default:
return
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}
if err != nil {
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w.Header().Del(contentType)
a.serveError(w, r, err.Error(), http.StatusInternalServerError)
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return
}
w.Header().Set(contentType, feedMediaType+contenttype.CharsetUtf8Suffix)
_, _ = a.min.Write(w, feedMediaType, []byte(feedString))
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}