gosora/routes/api.go

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package routes
import (
"encoding/json"
"errors"
"net/http"
"strconv"
"strings"
c "github.com/Azareal/Gosora/common"
)
// TODO: Make this a static file somehow? Is it possible for us to put this file somewhere else?
// TODO: Add an API so that plugins can register disallowed areas. E.g. /guilds/join for plugin_guilds
func RobotsTxt(w http.ResponseWriter, r *http.Request) c.RouteError {
// TODO: Do we have to put * or something at the end of the paths?
_, _ = w.Write([]byte(`User-agent: *
Disallow: /panel/*
Disallow: /topics/create/
Disallow: /user/edit/*
Disallow: /accounts/*
Disallow: /report/*
`))
return nil
}
var sitemapPageCap = 40000 // 40k, bump it up to 50k once we gzip this? Does brotli work on sitemaps?
func writeXMLHeader(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/xml")
w.Write([]byte("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"))
}
// TODO: Keep track of when a sitemap was last modifed and add a lastmod element for it
func SitemapXml(w http.ResponseWriter, r *http.Request) c.RouteError {
var s string
if c.Config.SslSchema {
s = "s"
}
sitemapItem := func(path string) {
w.Write([]byte(`<sitemap>
<loc>http` + s + `://` + c.Site.URL + "/" + path + `</loc>
</sitemap>
`))
}
writeXMLHeader(w, r)
w.Write([]byte("<sitemapindex xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\n"))
sitemapItem("sitemaps/topics.xml")
//sitemapItem("sitemaps/forums.xml")
//sitemapItem("sitemaps/users.xml")
w.Write([]byte("</sitemapindex>"))
return nil
}
type FuzzyRoute struct {
Path string
Handle func(http.ResponseWriter, *http.Request, int) c.RouteError
}
// TODO: Add a sitemap API and clean things up
// TODO: ^-- Make sure that the API is concurrent
// TODO: Add a social group sitemap
var sitemapRoutes = map[string]func(http.ResponseWriter, *http.Request) c.RouteError{
"forums.xml": SitemapForums,
"topics.xml": SitemapTopics,
}
// TODO: Use a router capable of parsing this rather than hard-coding the logic in
var fuzzySitemapRoutes = map[string]FuzzyRoute{
"topics_page_": FuzzyRoute{"topics_page_(%d).xml", SitemapTopic},
}
func sitemapSwitch(w http.ResponseWriter, r *http.Request) c.RouteError {
path := r.URL.Path[len("/sitemaps/"):]
for name, fuzzy := range fuzzySitemapRoutes {
if strings.HasPrefix(path, name) && strings.HasSuffix(path, ".xml") {
spath := strings.TrimPrefix(path, name)
spath = strings.TrimSuffix(spath, ".xml")
page, err := strconv.Atoi(spath)
if err != nil {
// ? What's this? Do we need it? Was it just a quick trace?
c.DebugLogf("Unable to convert string '%s' to integer in fuzzy route", spath)
return c.NotFound(w, r, nil)
}
return fuzzy.Handle(w, r, page)
}
}
route, ok := sitemapRoutes[path]
if !ok {
return c.NotFound(w, r, nil)
}
return route(w, r)
}
func SitemapForums(w http.ResponseWriter, r *http.Request) c.RouteError {
var s string
if c.Config.SslSchema {
s = "s"
}
sitemapItem := func(path string) {
w.Write([]byte(`<url>
<loc>http` + s + `://` + c.Site.URL + path + `</loc>
</url>
`))
}
group, err := c.Groups.Get(c.GuestUser.Group)
if err != nil {
return c.SilentInternalErrorXML(errors.New("The guest group doesn't exist for some reason"), w, r)
}
writeXMLHeader(w, r)
w.Write([]byte("<urlset xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\n"))
for _, fid := range group.CanSee {
// Avoid data races by copying the struct into something we can freely mold without worrying about breaking something somewhere else
f := c.Forums.DirtyGet(fid).Copy()
if f.ParentID == 0 && f.Name != "" && f.Active {
sitemapItem(c.BuildForumURL(c.NameToSlug(f.Name), f.ID))
}
}
w.Write([]byte("</urlset>"))
return nil
}
// TODO: Add a global ratelimit. 10 50MB files (smaller if compressed better) per minute?
// ? We might have problems with banned users, if they have fewer ViewTopic permissions than guests as they'll be able to see this list. Then again, a banned user could just logout to see it
func SitemapTopics(w http.ResponseWriter, r *http.Request) c.RouteError {
var s string
if c.Config.SslSchema {
s = "s"
}
sitemapItem := func(path string) {
w.Write([]byte(`<sitemap>
<loc>http` + s + `://` + c.Site.URL + "/" + path + `</loc>
</sitemap>
`))
}
group, err := c.Groups.Get(c.GuestUser.Group)
if err != nil {
return c.SilentInternalErrorXML(errors.New("The guest group doesn't exist for some reason"), w, r)
}
var visibleForums []c.Forum
for _, fid := range group.CanSee {
forum := c.Forums.DirtyGet(fid)
if forum.Name != "" && forum.Active {
visibleForums = append(visibleForums, forum.Copy())
}
}
topicCount, err := c.TopicCountInForums(visibleForums)
if err != nil {
return c.InternalErrorXML(err, w, r)
}
pageCount := topicCount / sitemapPageCap
//log.Print("topicCount", topicCount)
//log.Print("pageCount", pageCount)
writeXMLHeader(w, r)
w.Write([]byte("<sitemapindex xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\n"))
for i := 0; i <= pageCount; i++ {
sitemapItem("sitemaps/topics_page_" + strconv.Itoa(i) + ".xml")
}
w.Write([]byte("</sitemapindex>"))
return nil
}
func SitemapTopic(w http.ResponseWriter, r *http.Request, page int) c.RouteError {
/*var s string
if c.Config.SslSchema {
s = "s"
}
var sitemapItem = func(path string) {
w.Write([]byte(`<url>
<loc>http` + s + `://` + c.Site.URL + "/" + path + `</loc>
</url>
`))
}*/
group, err := c.Groups.Get(c.GuestUser.Group)
if err != nil {
return c.SilentInternalErrorXML(errors.New("The guest group doesn't exist for some reason"), w, r)
}
var visibleForums []c.Forum
for _, fid := range group.CanSee {
forum := c.Forums.DirtyGet(fid)
if forum.Name != "" && forum.Active {
visibleForums = append(visibleForums, forum.Copy())
}
}
argList, qlist := c.ForumListToArgQ(visibleForums)
topicCount, err := c.ArgQToTopicCount(argList, qlist)
if err != nil {
return c.InternalErrorXML(err, w, r)
}
pageCount := topicCount / sitemapPageCap
//log.Print("topicCount", topicCount)
//log.Print("pageCount", pageCount)
//log.Print("page",page)
if page > pageCount {
page = pageCount
}
writeXMLHeader(w, r)
w.Write([]byte("<urlset xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\n"))
w.Write([]byte("</urlset>"))
return nil
}
func SitemapUsers(w http.ResponseWriter, r *http.Request) c.RouteError {
writeXMLHeader(w, r)
w.Write([]byte("<sitemapindex xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\n"))
return nil
}
type JsonMe struct {
User *c.MeUser
Site MeSite
}
// We don't want to expose too much information about the site, so we'll make this a small subset of c.site
type MeSite struct {
MaxRequestSize int
}
// APIMe returns information about the current logged-in user
// TODO: Find some way to stop intermediaries from doing compression to avoid the BREACH attack
// TODO: Decouple site settings into a different API? I'd like to avoid having too many requests, if possible, maybe we can use a different name for this?
func APIMe(w http.ResponseWriter, r *http.Request, user c.User) c.RouteError {
// TODO: Don't make this too JSON dependent so that we can swap in newer more efficient formats
w.Header().Set("Content-Type", "application/json")
// We don't want an intermediary accidentally caching this
// TODO: Use this header anywhere with a user check?
w.Header().Set("Cache-Control", "private")
me := JsonMe{(&user).Me(), MeSite{c.Site.MaxRequestSize}}
jsonBytes, err := json.Marshal(me)
if err != nil {
return c.InternalErrorJS(err, w, r)
}
w.Write(jsonBytes)
return nil
}
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func OpenSearchXml(w http.ResponseWriter, r *http.Request) c.RouteError {
furl := "http"
if c.Config.SslSchema {
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furl += "s"
}
furl += "://" + c.Site.URL
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w.Write([]byte(`<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/" xmlns:moz="http://www.mozilla.org/2006/browser/search/">
<ShortName>` + c.Site.Name + `</ShortName>
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<InputEncoding>UTF-8</InputEncoding>
<Url type="text/html" template="` + furl + `/topics/?q={searchTerms}" />
<Url type="application/opensearchdescription+xml" rel="self" template="` + furl + `/opensearch.xml" />
<moz:SearchForm>` + furl + `</moz:SearchForm>
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</OpenSearchDescription>`))
return nil
}