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path: root/post.go
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package main

import (
	"fmt"
	"log"
	"net/http"

	"github.com/getwtxt/registry"
)

// Requests to apiEndpointPOSTHandler are passed off to this
// function. apiPostUser then fetches the twtxt data, then if
// it's an individual user's file, adds it. If it's registry
// output, it scrapes the users/urls/statuses from the remote
// registry before adding each user to the local cache.
func apiPostUser(w http.ResponseWriter, r *http.Request) {
	if err := r.ParseForm(); err != nil {
		log400(w, r, err.Error())
		return
	}

	nick := r.FormValue("nickname")
	urls := r.FormValue("url")
	if nick == "" || urls == "" {
		log400(w, r, "Nickname or URL missing")
		return
	}

	uip := getIPFromCtx(r.Context())

	out, remoteRegistry, err := registry.GetTwtxt(urls)
	if err != nil {
		log400(w, r, err.Error())
		return
	}

	if remoteRegistry {
		remoteRegistries.Mu.Lock()
		remoteRegistries.List = append(remoteRegistries.List, urls)
		remoteRegistries.Mu.Unlock()

		if err := twtxtCache.ScrapeRemoteRegistry(urls); err != nil {
			log400(w, r, err.Error())
			return
		}
		log200(r)
		return
	}

	statuses, err := registry.ParseUserTwtxt(out, nick, urls)
	if err != nil {
		log400(w, r, err.Error())
		return
	}

	if err := twtxtCache.AddUser(nick, urls, uip, statuses); err != nil {
		log400(w, r, err.Error())
		return
	}

	log200(r)
	_, err = w.Write([]byte(fmt.Sprintf("200 OK\n")))
	if err != nil {
		log.Printf("%v\n", err)
	}
}
t; padding-left: 5px; padding-right: 5px; } td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; } span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; } .highlight .hll { background-color: #ffffcc } .highlight .c { color: #888888 } /* Comment */ .highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */ .highlight .k { color: #008800; font-weight: bold } /* Keyword */ .highlight .ch { color: #888888 } /* Comment.Hashbang */ .highlight .cm { color: #888888 } /* Comment.Multiline */ .highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */ .highlight .cpf { color: #888888 } /* Comment.PreprocFile */ .highlight .c1 { color: #888888 } /* Comment.Single */ .highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */ .highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */ .highlight .ge { font-style: italic } /* Generic.Emph */ .highlight .ges { font-weight: bold; font-style: italic } /* Generic.EmphStrong */ .highlight .gr { color: #aa0000 } /* Generic.Error */ .highlight .gh { color: #333333 } /* Generic.Heading */ .highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */ .highlight .go { color: #888888 } /* Generic.Output */ .highlight .gp { color: #555555 } /* Generic.Prompt */ .highlight .gs { font-weight: bold } /* Generic.Strong */ .highlight .gu { color: #666666 } /* Generic.Subheading */ .highlight .gt { color: #aa0000 } /* Generic.Traceback */ .highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */ .highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */ .highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */ .highlight .kp { color: #008800 } /* Keyword.Pseudo */ .highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */ .highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */ .highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */ .highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */ .highlight .na { color: #336699 } /* Name.Attribute */ .highlight .nb { color: #003388 } /* Name.Builtin */ .highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */ .highlight .no { color: #003366; font-weight: bold } /* Name.Constant */ .highlight .nd { color: #555555 } /* Name.Decorator */ .highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */ .highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */ .highlight .nl { color: #336699; font-style: italic } /* Name.Label */ .highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */ .highlight .py { color: #336699; font-weight: bold } /* Name.Property */ .highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */ .highlight .nv { color: #336699 } /* Name.Variable */ .highlight .ow { color: #008800 } /* Operator.Word */ .highlight .w { color: #bbbbbb } /* Text.Whitespace */ .highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */ .highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */ .highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */ .highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */ .highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */ .highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */ .highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */ .highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */ .highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */ .highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
package msg

import (
	"bufio"
	"errors"
	"net/url"
	"strings"

	"git.sr.ht/~rjarry/aerc/lib"
	"git.sr.ht/~rjarry/aerc/models"
	"git.sr.ht/~rjarry/aerc/widgets"
	"github.com/emersion/go-message/mail"
)

// Unsubscribe helps people unsubscribe from mailing lists by way of the
// List-Unsubscribe header.
type Unsubscribe struct{}

func init() {
	register(Unsubscribe{})
}

// Aliases returns a list of aliases for the :unsubscribe command
func (Unsubscribe) Aliases() []string {
	return []string{"unsubscribe"}
}

// Complete returns a list of completions
func (Unsubscribe) Complete(aerc *widgets.Aerc, args []string) []string {
	return nil
}

// Execute runs the Unsubscribe command
func (Unsubscribe) Execute(aerc *widgets.Aerc, args []string) error {
	if len(args) != 1 {
		return errors.New("Usage: unsubscribe")
	}
	widget := aerc.SelectedTab().(widgets.ProvidesMessage)
	msg, err := widget.SelectedMessage()
	if err != nil {
		return err
	}
	headers := msg.RFC822Headers
	if !headers.Has("list-unsubscribe") {
		return errors.New("No List-Unsubscribe header found")
	}
	methods := parseUnsubscribeMethods(headers.Get("list-unsubscribe"))
	aerc.Logger().Printf("found %d unsubscribe methods", len(methods))
	for _, method := range methods {
		aerc.Logger().Printf("trying to unsubscribe using %v", method)
		switch method.Scheme {
		case "mailto":
			return unsubscribeMailto(aerc, method)
		case "http", "https":
			return unsubscribeHTTP(method)
		default:
			aerc.Logger().Printf("skipping unrecognized scheme: %s", method.Scheme)
		}
	}
	return errors.New("no supported unsubscribe methods found")
}

// parseUnsubscribeMethods reads the list-unsubscribe header and parses it as a
// list of angle-bracket <> deliminated URLs. See RFC 2369.
func parseUnsubscribeMethods(header string) (methods []*url.URL) {
	r := bufio.NewReader(strings.NewReader(header))
	for {
		// discard until <
		_, err := r.ReadSlice('<')
		if err != nil {
			return
		}
		// read until <
		m, err := r.ReadSlice('>')
		if err != nil {
			return
		}
		m = m[:len(m)-1]
		if u, err := url.Parse(string(m)); err == nil {
			methods = append(methods, u)
		}
	}
}

func unsubscribeMailto(aerc *widgets.Aerc, u *url.URL) error {
	widget := aerc.SelectedTab().(widgets.ProvidesMessage)
	acct := widget.SelectedAccount()

	h := &mail.Header{}
	h.SetSubject(u.Query().Get("subject"))
	if to, err := mail.ParseAddressList(u.Opaque); err == nil {
		h.SetAddressList("to", to)
	}

	composer, err := widgets.NewComposer(
		aerc,
		acct,
		aerc.Config(),
		acct.AccountConfig(),
		acct.Worker(),
		"",
		h,
		models.OriginalMail{},
	)
	if err != nil {
		return err
	}
	composer.SetContents(strings.NewReader(u.Query().Get("body")))
	tab := aerc.NewTab(composer, "unsubscribe")
	composer.OnHeaderChange("Subject", func(subject string) {
		if subject == "" {
			tab.Name = "unsubscribe"
		} else {
			tab.Name = subject
		}
		tab.Content.Invalidate()
	})
	return nil
}

func unsubscribeHTTP(u *url.URL) error {
	return lib.NewXDGOpen(u.String()).Start()
}