mirror of https://github.com/jlelse/GoBlog
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152 lines
3.9 KiB
Go
152 lines
3.9 KiB
Go
package main
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import (
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"bytes"
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"context"
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"io"
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"log"
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"net/http"
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"sort"
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"strings"
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"time"
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"github.com/carlmjohnson/requests"
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"github.com/kaorimatz/go-opml"
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"github.com/samber/lo"
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"go.goblog.app/app/pkgs/bufferpool"
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"go.goblog.app/app/pkgs/contenttype"
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)
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const defaultBlogrollPath = "/blogroll"
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func (a *goBlog) serveBlogroll(w http.ResponseWriter, r *http.Request) {
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blog, bc := a.getBlog(r)
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outlines, err, _ := a.blogrollCacheGroup.Do(blog, func() (any, error) {
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return a.getBlogrollOutlines(blog)
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})
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if err != nil {
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log.Printf("Failed to get outlines: %v", err)
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a.serveError(w, r, "", http.StatusInternalServerError)
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return
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}
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c := bc.Blogroll
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can := bc.getRelativePath(defaultIfEmpty(c.Path, defaultBlogrollPath))
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a.render(w, r, a.renderBlogroll, &renderData{
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Canonical: a.getFullAddress(can),
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Data: &blogrollRenderData{
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title: c.Title,
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description: c.Description,
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outlines: outlines.([]*opml.Outline),
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download: can + ".opml",
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},
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})
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}
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func (a *goBlog) serveBlogrollExport(w http.ResponseWriter, r *http.Request) {
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blog, _ := a.getBlog(r)
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outlines, err, _ := a.blogrollCacheGroup.Do(blog, func() (any, error) {
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return a.getBlogrollOutlines(blog)
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})
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if err != nil {
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log.Printf("Failed to get outlines: %v", err)
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a.serveError(w, r, "", http.StatusInternalServerError)
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return
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}
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pr, pw := io.Pipe()
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go func() {
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_ = pw.CloseWithError(opml.Render(pw, &opml.OPML{
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Version: "2.0",
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DateCreated: time.Now().UTC(),
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Outlines: outlines.([]*opml.Outline),
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}))
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}()
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w.Header().Set(contentType, contenttype.XMLUTF8)
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_ = pr.CloseWithError(a.min.Get().Minify(contenttype.XML, w, pr))
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}
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func (a *goBlog) getBlogrollOutlines(blog string) ([]*opml.Outline, error) {
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// Get config
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config := a.cfg.Blogs[blog].Blogroll
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// Check cache
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if cache := a.db.loadOutlineCache(blog); cache != nil {
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return cache, nil
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}
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// Make request and parse OPML
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pr, pw := io.Pipe()
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rb := requests.URL(config.Opml).Client(a.httpClient).ToWriter(pw)
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if config.AuthHeader != "" && config.AuthValue != "" {
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rb.Header(config.AuthHeader, config.AuthValue)
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}
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go func() {
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_ = pw.CloseWithError(rb.Fetch(context.Background()))
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}()
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o, err := opml.Parse(pr)
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_ = pr.CloseWithError(err)
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if err != nil {
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return nil, err
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}
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// Filter and sort
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outlines := o.Outlines
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if len(config.Categories) > 0 {
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filtered := []*opml.Outline{}
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for _, category := range config.Categories {
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if outline, ok := lo.Find(outlines, func(outline *opml.Outline) bool {
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return outline.Title == category || outline.Text == category
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}); ok && outline != nil {
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outline.Outlines = sortOutlines(outline.Outlines)
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filtered = append(filtered, outline)
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}
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}
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outlines = filtered
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} else {
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outlines = sortOutlines(outlines)
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}
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// Cache
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a.db.cacheOutlines(blog, outlines)
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return outlines, nil
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}
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func (db *database) cacheOutlines(blog string, outlines []*opml.Outline) {
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opmlBuffer := bufferpool.Get()
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_ = opml.Render(opmlBuffer, &opml.OPML{
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Version: "2.0",
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DateCreated: time.Now().UTC(),
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Outlines: outlines,
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})
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_ = db.cachePersistently("blogroll_"+blog, opmlBuffer.Bytes())
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bufferpool.Put(opmlBuffer)
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}
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func (db *database) loadOutlineCache(blog string) []*opml.Outline {
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data, err := db.retrievePersistentCache("blogroll_" + blog)
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if err != nil || data == nil {
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return nil
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}
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o, err := opml.Parse(bytes.NewReader(data))
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if err != nil {
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return nil
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}
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if time.Since(o.DateCreated).Minutes() > 60 {
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return nil
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}
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return o.Outlines
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}
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func sortOutlines(outlines []*opml.Outline) []*opml.Outline {
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sort.Slice(outlines, func(i, j int) bool {
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name1 := outlines[i].Title
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if name1 == "" {
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name1 = outlines[i].Text
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}
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name2 := outlines[j].Title
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if name2 == "" {
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name2 = outlines[j].Text
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}
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return strings.ToLower(name1) < strings.ToLower(name2)
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})
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for _, outline := range outlines {
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outline.Outlines = sortOutlines(outline.Outlines)
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}
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return outlines
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}
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