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add updates serve command to serve a json or html version of the changelog.json, with contents based on ?from= query string
This commit is contained in:
Mechiel Lukkien
parent
dfd7b721ae
commit
f867bcfa21
2 changed files with 144 additions and 0 deletions
1
main.go
1
main.go
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@ -145,6 +145,7 @@ var commands = []struct {
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{"updates addsigned", cmdUpdatesAddSigned},
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{"updates genkey", cmdUpdatesGenkey},
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{"updates pubkey", cmdUpdatesPubkey},
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{"updates serve", cmdUpdatesServe},
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{"updates verify", cmdUpdatesVerify},
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}
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143
updates.go
143
updates.go
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@ -7,10 +7,14 @@ import (
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"encoding/base64"
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"encoding/json"
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"fmt"
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htmltemplate "html/template"
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"io"
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"log"
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"net/http"
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"os"
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"strings"
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"github.com/mjl-/mox/moxio"
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"github.com/mjl-/mox/updates"
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)
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@ -132,3 +136,142 @@ func cmdUpdatesPubkey(c *cmd) {
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err = enc.Close()
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xcheckf(err, "writing public key")
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}
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var updatesTemplate = htmltemplate.Must(htmltemplate.New("changelog").Parse(`<!doctype html>
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<html>
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<title>mox changelog</title>
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<style>
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body, html { padding: 1em; font-size: 16px; }
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* { font-size: inherit; font-family: ubuntu, lato, sans-serif; margin: 0; padding: 0; box-sizing: border-box; }
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h1, h2, h3, h4 { margin-bottom: 1ex; }
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h1 { font-size: 1.2rem; }
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.literal { background-color: #fdfdfd; padding: .5em 1em; border: 1px solid #eee; border-radius: 4px; white-space: pre-wrap; font-family: monospace; font-size: 15px; tab-size: 4; }
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</style>
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</head>
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<body>
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<h1>Changes{{ if .FromVersion }} since {{ .FromVersion }}{{ end }}</h1>
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{{ if not .Changes }}
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<div>No changes</div>
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{{ end }}
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{{ range .Changes }}
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<pre class="literal">{{ .Text }}</pre>
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<hr style="margin:1ex 0" />
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{{ end }}
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</body>
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</html>
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`))
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func cmdUpdatesServe(c *cmd) {
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c.unlisted = true
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c.help = "Serve changelog.json with updates."
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var address, changelog string
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c.flag.StringVar(&address, "address", "127.0.0.1:8596", "address to serve /changelog on")
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c.flag.StringVar(&changelog, "changelog", "changelog.json", "changelog file to serve")
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args := c.Parse()
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if len(args) != 0 {
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c.Usage()
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}
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parseFile := func() (*updates.Changelog, error) {
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f, err := os.Open(changelog)
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if err != nil {
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return nil, err
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}
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defer f.Close()
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var cl updates.Changelog
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if err := json.NewDecoder(f).Decode(&cl); err != nil {
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return nil, err
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}
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return &cl, nil
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}
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_, err := parseFile()
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if err != nil {
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log.Fatalf("parsing %s: %v", changelog, err)
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}
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srv := http.NewServeMux()
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srv.HandleFunc("/changelog", func(w http.ResponseWriter, r *http.Request) {
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cl, err := parseFile()
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if err != nil {
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log.Printf("parsing %s: %v", changelog, err)
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http.Error(w, "500 - internal server error", http.StatusInternalServerError)
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return
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}
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from := r.URL.Query().Get("from")
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var fromVersion *updates.Version
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if from != "" {
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v, err := updates.ParseVersion(from)
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if err == nil {
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fromVersion = &v
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}
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}
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if fromVersion != nil {
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nextchange:
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for i, c := range cl.Changes {
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for _, line := range strings.Split(strings.Split(c.Text, "\n\n")[0], "\n") {
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if strings.HasPrefix(line, "version:") {
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v, err := updates.ParseVersion(strings.TrimSpace(strings.TrimPrefix(line, "version:")))
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if err == nil && !v.After(*fromVersion) {
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cl.Changes = cl.Changes[:i]
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break nextchange
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}
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}
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}
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}
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}
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// Check if client accepts html. If so, we'll provide a human-readable version.
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accept := r.Header.Get("Accept")
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var html bool
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accept:
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for _, ac := range strings.Split(accept, ",") {
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var ok bool
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for i, kv := range strings.Split(strings.TrimSpace(ac), ";") {
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if i == 0 {
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ct := strings.TrimSpace(kv)
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if strings.EqualFold(ct, "text/html") || strings.EqualFold(ct, "text/*") {
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ok = true
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continue
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}
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continue accept
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}
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t := strings.SplitN(strings.TrimSpace(kv), "=", 2)
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if !strings.EqualFold(t[0], "q") || len(t) != 2 {
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continue
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}
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switch t[1] {
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case "0", "0.", "0.0", "0.00", "0.000":
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ok = false
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continue accept
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}
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break
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}
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if ok {
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html = true
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break
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}
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}
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if html {
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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err := updatesTemplate.Execute(w, map[string]any{
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"FromVersion": fromVersion,
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"Changes": cl.Changes,
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})
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if err != nil && !moxio.IsClosed(err) {
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log.Printf("writing changelog html: %v", err)
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}
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} else {
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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if err := json.NewEncoder(w).Encode(cl); err != nil && !moxio.IsClosed(err) {
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log.Printf("writing changelog json: %v", err)
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}
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}
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})
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log.Printf("listening on %s", address)
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log.Fatalln(http.ListenAndServe(address, srv))
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}
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