xesite/cmd/site/main.go

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package main
import (
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"context"
"html/template"
"io/ioutil"
"net/http"
"os"
"time"
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"christine.website/internal/blog"
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"christine.website/internal/jsonfeed"
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"christine.website/internal/middleware"
"github.com/gorilla/feeds"
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"github.com/povilasv/prommod"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
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blackfriday "github.com/russross/blackfriday"
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"github.com/sebest/xff"
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"github.com/snabb/sitemap"
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"within.website/ln"
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"within.website/ln/ex"
"within.website/ln/opname"
)
var port = os.Getenv("PORT")
func main() {
if port == "" {
port = "29384"
}
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ctx := ln.WithF(opname.With(context.Background(), "main"), ln.F{
"port": port,
})
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_ = prometheus.Register(prommod.NewCollector("christine"))
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s, err := Build()
if err != nil {
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ln.FatalErr(ctx, err, ln.Action("Build"))
}
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mux := http.NewServeMux()
mux.HandleFunc("/.within/health", func(w http.ResponseWriter, r *http.Request) {
http.Error(w, "OK", http.StatusOK)
})
mux.Handle("/", s)
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ln.Log(ctx, ln.Action("http_listening"))
ln.FatalErr(ctx, http.ListenAndServe(":"+port, mux))
}
// Site is the parent object for https://christine.website's backend.
type Site struct {
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Posts blog.Posts
Resume template.HTML
rssFeed *feeds.Feed
jsonFeed *jsonfeed.Feed
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mux *http.ServeMux
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xffmw *xff.XFF
}
func (s *Site) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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ctx := opname.With(r.Context(), "site.ServeHTTP")
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ctx = ln.WithF(ctx, ln.F{
"user_agent": r.Header.Get("User-Agent"),
})
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r = r.WithContext(ctx)
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middleware.RequestID(s.xffmw.Handler(ex.HTTPLog(s.mux))).ServeHTTP(w, r)
}
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var arbDate = time.Date(2019, time.March, 21, 18, 0, 0, 0, time.UTC)
// Build creates a new Site instance or fails.
func Build() (*Site, error) {
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smi := sitemap.New()
smi.Add(&sitemap.URL{
Loc: "https://christine.website/resume",
LastMod: &arbDate,
ChangeFreq: sitemap.Monthly,
})
smi.Add(&sitemap.URL{
Loc: "https://christine.website/contact",
LastMod: &arbDate,
ChangeFreq: sitemap.Monthly,
})
smi.Add(&sitemap.URL{
Loc: "https://christine.website/",
LastMod: &arbDate,
ChangeFreq: sitemap.Monthly,
})
smi.Add(&sitemap.URL{
Loc: "https://christine.website/blog",
LastMod: &arbDate,
ChangeFreq: sitemap.Weekly,
})
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xffmw, err := xff.Default()
if err != nil {
return nil, err
}
s := &Site{
rssFeed: &feeds.Feed{
Title: "Christine Dodrill's Blog",
Link: &feeds.Link{Href: "https://christine.website/blog"},
Description: "My blog posts and rants about various technology things.",
Author: &feeds.Author{Name: "Christine Dodrill", Email: "me@christine.website"},
Created: bootTime,
Copyright: "This work is copyright Christine Dodrill. My viewpoints are my own and not the view of any employer past, current or future.",
},
jsonFeed: &jsonfeed.Feed{
Version: jsonfeed.CurrentVersion,
Title: "Christine Dodrill's Blog",
HomePageURL: "https://christine.website",
FeedURL: "https://christine.website/blog.json",
Description: "My blog posts and rants about various technology things.",
UserComment: "This is a JSON feed of my blogposts. For more information read: https://jsonfeed.org/version/1",
Icon: icon,
Favicon: icon,
Author: jsonfeed.Author{
Name: "Christine Dodrill",
Avatar: icon,
},
},
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mux: http.NewServeMux(),
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xffmw: xffmw,
}
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posts, err := blog.LoadPosts("./blog/")
if err != nil {
return nil, err
}
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s.Posts = posts
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resumeData, err := ioutil.ReadFile("./static/resume/resume.md")
if err != nil {
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return nil, err
}
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s.Resume = template.HTML(blackfriday.Run(resumeData))
for _, item := range s.Posts {
s.rssFeed.Items = append(s.rssFeed.Items, &feeds.Item{
Title: item.Title,
Link: &feeds.Link{Href: "https://christine.website/" + item.Link},
Description: item.Summary,
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Created: item.Date,
})
s.jsonFeed.Items = append(s.jsonFeed.Items, jsonfeed.Item{
ID: "https://christine.website/" + item.Link,
URL: "https://christine.website/" + item.Link,
Title: item.Title,
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DatePublished: item.Date,
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ContentHTML: string(item.BodyHTML),
})
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smi.Add(&sitemap.URL{
Loc: "https://christine.website/" + item.Link,
LastMod: &item.Date,
ChangeFreq: sitemap.Monthly,
})
}
// Add HTTP routes here
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s.mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != "/" {
w.WriteHeader(http.StatusNotFound)
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s.renderTemplatePage("error.html", "can't find "+r.URL.Path).ServeHTTP(w, r)
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return
}
s.renderTemplatePage("index.html", nil).ServeHTTP(w, r)
})
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s.mux.Handle("/metrics", promhttp.Handler())
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s.mux.Handle("/resume", middleware.Metrics("resume", s.renderTemplatePage("resume.html", s.Resume)))
s.mux.Handle("/blog", middleware.Metrics("blog", s.renderTemplatePage("blogindex.html", s.Posts)))
s.mux.Handle("/contact", middleware.Metrics("contact", s.renderTemplatePage("contact.html", nil)))
s.mux.Handle("/blog.rss", middleware.Metrics("blog.rss", http.HandlerFunc(s.createFeed)))
s.mux.Handle("/blog.atom", middleware.Metrics("blog.atom", http.HandlerFunc(s.createAtom)))
s.mux.Handle("/blog.json", middleware.Metrics("blog.json", http.HandlerFunc(s.createJSONFeed)))
s.mux.Handle("/blog/", middleware.Metrics("blogpost", http.HandlerFunc(s.showPost)))
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s.mux.Handle("/css/", http.FileServer(http.Dir(".")))
s.mux.Handle("/static/", http.FileServer(http.Dir(".")))
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s.mux.HandleFunc("/sw.js", func(w http.ResponseWriter, r *http.Request) {
http.ServeFile(w, r, "./static/js/sw.js")
})
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s.mux.HandleFunc("/robots.txt", func(w http.ResponseWriter, r *http.Request) {
http.ServeFile(w, r, "./static/robots.txt")
})
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s.mux.Handle("/sitemap.xml", middleware.Metrics("sitemap", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/xml")
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_, _ = smi.WriteTo(w)
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})))
return s, nil
}
const icon = "https://christine.website/static/img/avatar.png"