gosora/router_gen/main.go

/* WIP Under Construction */
package main

import (
    "bytes"
    "log"
    "os"
    "strconv"
    "strings"
    "text/template"
)

type TmplVars struct {
    RouteList         []*RouteImpl
    RouteGroups       []*RouteGroup
    AllRouteNames     []RouteName
    AllRouteMap       map[string]int
    AllAgentNames     []string
    AllAgentMap       map[string]int
    AllAgentMarkNames []string
    AllAgentMarks     map[string]string
    AllAgentMarkIDs   map[string]int
    AllOSNames        []string
    AllOSMap          map[string]int
}

type RouteName struct {
    Plain string
    Short string
}

func main() {
    log.Println("Generating the router...")

    // Load all the routes...
    r := &Router{}
    routes(r)

    tmplVars := TmplVars{
        RouteList:   r.routeList,
        RouteGroups: r.routeGroups,
    }
    var allRouteNames []RouteName
    allRouteMap := make(map[string]int)

    var out string
    mapIt := func(name string) {
        allRouteNames = append(allRouteNames, RouteName{name, strings.Replace(name, "common.", "c.", -1)})
        allRouteMap[name] = len(allRouteNames) - 1
    }
    mapIt("routes.Error")

    var indentCache [20]string
    countToIndents := func(ind int) string {
        out := indentCache[ind]
        if out != "" {
            return out
        }
        for i := 0; i < ind; i++ {
            out += "\t"
        }
        if ind < 20 {
            indentCache[ind] = out
        }
        return out
    }
    o := func(indent int, str string) {
        out += countToIndents(indent) + str
    }
    on := func(indent int, str string) {
        out += "\n" + countToIndents(indent) + str
    }
    iferrn := func(indent int) {
        ind := countToIndents(indent)
        ind2 := countToIndents(indent + 1)
        out += "\n" + ind + "if err != nil {"
        out += "\n" + ind2 + "return err\n" + ind + "}"
    }

    runBefore := func(runnables []Runnable, ind int) {
        if len(runnables) > 0 {
            for _, runnable := range runnables {
                if runnable.Literal {
                    on(ind, runnable.Contents)
                } else {
                    on(ind, "err = c."+runnable.Contents+"(w,req,user)")
                    iferrn(ind)
                    o(ind, "\n")
                }
            }
        }
    }
    userCheckNano := func(indent int, route *RouteImpl) {
        on(indent, "h, err := c.UserCheckNano(w,req,user,cn)")
        iferrn(indent)
        vcpy := route.Vars
        route.Vars = []string{"h"}
        route.Vars = append(route.Vars, vcpy...)
    }
    writeRoute := func(indent int, r *RouteImpl) {
        on(indent, "err = "+strings.Replace(r.Name, "common.", "c.", -1)+"(w,req,user")
        for _, item := range r.Vars {
            out += "," + item
        }
        out += `)`
    }

    for _, route := range r.routeList {
        mapIt(route.Name)
        end := len(route.Path) - 1
        on(2, "case \""+route.Path[0:end]+"\":")
        //on(3,"id = " + strconv.Itoa(allRouteMap[route.Name]))
        runBefore(route.RunBefore, 3)
        if !route.Action && !route.NoHead {
            userCheckNano(3, route)
        }
        writeRoute(3, route)
        if route.Name != "common.RouteWebsockets" {
            on(3, "co.RouteViewCounter.Bump3("+strconv.Itoa(allRouteMap[route.Name])+", cn)")
        }
    }

    prec := NewPrec()
    prec.AddSet("MemberOnly", "SuperModOnly", "AdminOnly", "SuperAdminOnly")

    // Hoist runnables which appear on every route to the route group to avoid code duplication
    dupeMap := make(map[string]int)
    //skipRunnableAntiDupe:
    for _, g := range r.routeGroups {
        for _, route := range g.RouteList {
            if len(route.RunBefore) == 0 {
                continue //skipRunnableAntiDupe
            }
            // TODO: What if there are duplicates of the same runnable on this route?
            for _, runnable := range route.RunBefore {
                dupeMap[runnable.Contents] += 1
            }
        }

        // Unset entries which are already set on the route group
        for _, gRunnable := range g.RunBefore {
            delete(dupeMap, gRunnable.Contents)
            for _, item := range prec.LessThanItem(gRunnable.Contents) {
                delete(dupeMap, item)
            }
        }

        for runnable, count := range dupeMap {
            if count == len(g.RouteList) {
                g.Before(runnable)
            }
        }
        // This method is optimised in the compiler to do a bulk delete
        for name, _ := range dupeMap {
            delete(dupeMap, name)
        }
    }

    for _, group := range r.routeGroups {
        end := len(group.Path) - 1
        on(2, "case \""+group.Path[0:end]+"\":")
        runBefore(group.RunBefore, 3)
        on(3, "switch(req.URL.Path) {")

        defaultRoute := blankRoute()
        for _, route := range group.RouteList {
            if group.Path == route.Path {
                defaultRoute = route
                continue
            }
            mapIt(route.Name)

            on(4, "case \""+route.Path+"\":")
            //on(5,"id = " + strconv.Itoa(allRouteMap[route.Name]))
            if len(route.RunBefore) > 0 {
            skipRunnable:
                for _, runnable := range route.RunBefore {
                    for _, gRunnable := range group.RunBefore {
                        if gRunnable.Contents == runnable.Contents {
                            continue skipRunnable
                        }
                        if prec.GreaterThan(gRunnable.Contents, runnable.Contents) {
                            continue skipRunnable
                        }
                    }

                    if runnable.Literal {
                        on(5, runnable.Contents)
                    } else {
                        on(5, "err = c."+runnable.Contents+"(w,req,user)")
                        iferrn(5)
                        on(5, "")
                    }
                }
            }
            if !route.Action && !route.NoHead && !group.NoHead {
                userCheckNano(5, route)
            }
            writeRoute(5, route)
            on(5, "co.RouteViewCounter.Bump3("+strconv.Itoa(allRouteMap[route.Name])+", cn)")
        }

        if defaultRoute.Name != "" {
            mapIt(defaultRoute.Name)
            on(4, "default:")
            //on(5,"id = " + strconv.Itoa(allRouteMap[defaultRoute.Name]))
            runBefore(defaultRoute.RunBefore, 4)
            if !defaultRoute.Action && !defaultRoute.NoHead && !group.NoHead {
                userCheckNano(5, defaultRoute)
            }
            writeRoute(5, defaultRoute)
            on(5, "co.RouteViewCounter.Bump3("+strconv.Itoa(allRouteMap[defaultRoute.Name])+", cn)")
        }
        on(3, "}")
    }

    // Stubs for us to refer to these routes through
    mapIt("routes.DynamicRoute")
    mapIt("routes.UploadedFile")
    mapIt("routes.StaticFile")
    mapIt("routes.RobotsTxt")
    mapIt("routes.SitemapXml")
    mapIt("routes.OpenSearchXml")
    mapIt("routes.Favicon")
    mapIt("routes.BadRoute")
    mapIt("routes.HTTPSRedirect")
    tmplVars.AllRouteNames = allRouteNames
    tmplVars.AllRouteMap = allRouteMap

    tmplVars.AllOSNames = []string{
        "unknown",
        "windows",
        "linux",
        "mac",
        "android",
        "iphone",
    }
    tmplVars.AllOSMap = make(map[string]int)
    for id, os := range tmplVars.AllOSNames {
        tmplVars.AllOSMap[os] = id
    }

    tmplVars.AllAgentNames = []string{
        "unknown",
        "opera",
        "chrome",
        "firefox",
        "safari",
        "edge",
        "internetexplorer",
        "trident", // Hack to support IE11

        "androidchrome",
        "mobilesafari",
        "samsung",
        "ucbrowser",

        "googlebot",
        "yandex",
        "bing",
        "slurp",
        "exabot",
        "mojeek",
        "cliqz",
        "qwant",
        "datenbank",
        "baidu",
        "sogou",
        "toutiao",
        "haosou",
        "duckduckgo",
        "seznambot",
        "discord",
        "telegram",
        "twitter",
        "facebook",
        "cloudflare",
        "archive_org",
        "uptimebot",
        "slackbot",
        "apple",
        "discourse",
        "xenforo",
        "mattermost",
        "alexa",
        "lynx",
        "blank",
        "malformed",
        "suspicious",
        "semrush",
        "dotbot",
        "ahrefs",
        "proximic",
        "megaindex",
        "majestic",
        "cocolyze",
        "babbar",
        "surdotly",
        "domcop",
        "netcraft",
        "seostar",
        "pandalytics",
        "blexbot",
        "wappalyzer",
        "twingly",
        "linkfluence",
        "pagething",
        "burf",
        "aspiegel",
        "mail_ru",
        "ccbot",
        "yacy",
        "zgrab",
        "cloudsystemnetworks",
        "maui",
        "curl",
        "python",
        //"go",
        "headlesschrome",
        "awesome_bot",
    }

    tmplVars.AllAgentMap = make(map[string]int)
    for id, agent := range tmplVars.AllAgentNames {
        tmplVars.AllAgentMap[agent] = id
    }

    tmplVars.AllAgentMarkNames = []string{}
    tmplVars.AllAgentMarks = map[string]string{}

    // Add agent marks
    a := func(mark, agent string) {
        tmplVars.AllAgentMarkNames = append(tmplVars.AllAgentMarkNames, mark)
        tmplVars.AllAgentMarks[mark] = agent
    }
    a("OPR", "opera")
    a("Chrome", "chrome")
    a("Firefox", "firefox")
    a("Safari", "safari")
    a("MSIE", "internetexplorer")
    a("Trident", "trident") // Hack to support IE11
    a("Edge", "edge")
    a("Lynx", "lynx") // There's a rare android variant of lynx which isn't covered by this
    a("SamsungBrowser", "samsung")
    a("UCBrowser", "ucbrowser")

    a("Google", "googlebot")
    a("Googlebot", "googlebot")
    a("yandex", "yandex") // from the URL
    a("DuckDuckBot", "duckduckgo")
    a("DuckDuckGo", "duckduckgo")
    a("Baiduspider", "baidu")
    a("Sogou", "sogou")
    a("ToutiaoSpider", "toutiao")
    a("Bytespider", "toutiao")
    a("360Spider", "haosou")
    a("bingbot", "bing")
    a("BingPreview", "bing")
    a("msnbot", "bing")
    a("Slurp", "slurp")
    a("Exabot", "exabot")
    a("MojeekBot", "mojeek")
    a("Cliqzbot", "cliqz")
    a("Qwantify", "qwant")
    a("netEstate", "datenbank")
    a("SeznamBot", "seznambot")
    a("CloudFlare", "cloudflare") // Track alwayson specifically in case there are other bots?
    a("archive", "archive_org")   //archive.org_bot
    a("Uptimebot", "uptimebot")
    a("Slackbot", "slackbot")
    a("Slack", "slackbot")
    a("Discordbot", "discord")
    a("TelegramBot", "telegram")
    a("Twitterbot", "twitter")
    a("facebookexternalhit", "facebook")
    a("Facebot", "facebook")
    a("Applebot", "apple")
    a("Discourse", "discourse")
    a("XenForo", "xenforo")
    a("mattermost", "mattermost")
    a("ia_archiver", "alexa")

    a("SemrushBot", "semrush")
    a("DotBot", "dotbot")
    a("AhrefsBot", "ahrefs")
    a("proximic", "proximic")
    a("MegaIndex", "megaindex")
    a("MJ12bot", "majestic") // TODO: This isn't matching bots out in the wild
    a("mj12bot", "majestic")
    a("Cocolyzebot", "cocolyze")
    a("Barkrowler", "babbar")
    a("SurdotlyBot", "surdotly")
    a("DomCopBot", "domcop")
    a("NetcraftSurveyAgent", "netcraft")
    a("seostar", "seostar")
    a("Pandalytics", "pandalytics")
    a("BLEXBot", "blexbot")
    a("Wappalyzer", "wappalyzer")
    a("Twingly", "twingly")
    a("linkfluence", "linkfluence")
    a("PageThing", "pagething")
    a("Burf", "burf")
    a("AspiegelBot", "aspiegel")
    a("PetalBot", "aspiegel")
    a("RU_Bot", "mail_ru") // Mail.RU_Bot
    a("CCBot", "ccbot")
    a("yacybot", "yacy")
    a("zgrab", "zgrab")
    a("Nimbostratus", "cloudsystemnetworks")
    a("MauiBot", "maui")
    a("curl", "curl")
    a("python", "python")
    //a("Go", "go") // yacy has java as part of it's UA, try to avoid hitting crawlers written in go
    a("HeadlessChrome", "headlesschrome")
    a("awesome_bot", "awesome_bot")
    // TODO: Detect Adsbot/3.1, it has a similar user agent to Google's Adsbot, but it is different. No Google fragments.

    tmplVars.AllAgentMarkIDs = make(map[string]int)
    for mark, agent := range tmplVars.AllAgentMarks {
        tmplVars.AllAgentMarkIDs[mark] = tmplVars.AllAgentMap[agent]
    }

    fileData := `// Code generated by Gosora's Router Generator. DO NOT EDIT.
/* This file was automatically generated by the software. Please don't edit it as your changes may be overwritten at any moment. */
package main

import (
    "strings"
    //"bytes"
    "strconv"
    "compress/gzip"
    "sync/atomic"
    "errors"
    "net/http"

    c "github.com/Azareal/Gosora/common"
    co "github.com/Azareal/Gosora/common/counters"
    "github.com/Azareal/Gosora/uutils"
    "github.com/Azareal/Gosora/routes"
    "github.com/Azareal/Gosora/routes/panel"

    //"github.com/andybalholm/brotli"
)

var ErrNoRoute = errors.New("That route doesn't exist.")
// TODO: What about the /uploads/ route? x.x
var RouteMap = map[string]interface{}{ {{range .AllRouteNames}}
    "{{.Plain}}": {{.Short}},{{end}}
}

// ! NEVER RELY ON THESE REMAINING THE SAME BETWEEN COMMITS
var routeMapEnum = map[string]int{ {{range $index, $el := .AllRouteNames}}
    "{{$el.Plain}}": {{$index}},{{end}}
}
var reverseRouteMapEnum = map[int]string{ {{range $index, $el := .AllRouteNames}}
    {{$index}}: "{{$el.Plain}}",{{end}}
}
var osMapEnum = map[string]int{ {{range $index, $el := .AllOSNames}}
    "{{$el}}": {{$index}},{{end}}
}
var reverseOSMapEnum = map[int]string{ {{range $index, $el := .AllOSNames}}
    {{$index}}: "{{$el}}",{{end}}
}
var agentMapEnum = map[string]int{ {{range $index, $el := .AllAgentNames}}
    "{{$el}}": {{$index}},{{end}}
}
var reverseAgentMapEnum = map[int]string{ {{range $index, $el := .AllAgentNames}}
    {{$index}}: "{{$el}}",{{end}}
}
var markToAgent = map[string]string{ {{range $index, $el := .AllAgentMarkNames}}
    "{{$el}}": "{{index $.AllAgentMarks $el}}",{{end}}
}
var markToID = map[string]int{ {{range $index, $el := .AllAgentMarkNames}}
    "{{$el}}": {{index $.AllAgentMarkIDs $el}},{{end}}
}
/*var agentRank = map[string]int{
    "opera":9,
    "chrome":8,
    "safari":1,
}*/

// HTTPSRedirect is a connection handler which redirects all HTTP requests to HTTPS
type HTTPSRedirect struct {}

func (red *HTTPSRedirect) ServeHTTP(w http.ResponseWriter, req *http.Request) {
    w.Header().Set("Connection", "close")
    co.RouteViewCounter.Bump({{index .AllRouteMap "routes.HTTPSRedirect"}})
    dest := "https://" + req.Host + req.URL.String()
    http.Redirect(w, req, dest, http.StatusTemporaryRedirect)
}

func (r *GenRouter) SuspiciousRequest(req *http.Request, pre string) {
    if c.Config.DisableSuspLog {
        return
    }
    var sb strings.Builder
    if pre != "" {
        sb.WriteString("Suspicious Request\n")
    } else {
        pre = "Suspicious Request"
    }
    r.ddumpRequest(req,pre,r.suspLog,&sb)
    co.AgentViewCounter.Bump({{.AllAgentMap.suspicious}})
}

// TODO: Pass the default path or config struct to the router rather than accessing it via a package global
// TODO: SetDefaultPath
// TODO: GetDefaultPath
func (r *GenRouter) ServeHTTP(w http.ResponseWriter, req *http.Request) {
    malformedRequest := func(typ int) {
        w.WriteHeader(200) // 400
        w.Write([]byte(""))
        r.DumpRequest(req,"Malformed Request T"+strconv.Itoa(typ))
        co.AgentViewCounter.Bump({{.AllAgentMap.malformed}})
    }
    
    // Split the Host and Port string
    var shost, sport string
    if req.Host[0]=='[' {
        spl := strings.Split(req.Host,"]")
        if len(spl) > 2 {
            malformedRequest(0)
            return
        }
        shost = strings.TrimPrefix(spl[0],"[")
        sport = strings.TrimPrefix(spl[1],":")
    } else if strings.Contains(req.Host,":") {
        spl := strings.Split(req.Host,":")
        if len(spl) > 2 {
            malformedRequest(1)
            return
        }
        shost = spl[0]
        //if len(spl)==2 {
            sport = spl[1]
        //}
    } else {
        shost = req.Host
    }
    // TODO: Reject requests from non-local IPs, if the site host is set to localhost or a localhost IP
    if !c.Config.LoosePort && c.Site.PortInt != 80 && c.Site.PortInt != 443 && sport != c.Site.Port {
        malformedRequest(2)
        return
    }
    
    // Redirect www. and local IP requests to the right place
    if strings.HasPrefix(shost, "www.") || c.Site.LocalHost {
    if shost == "www." + c.Site.Host || (c.Site.LocalHost && shost != c.Site.Host && isLocalHost(shost)) {
        // TODO: Abstract the redirect logic?
        w.Header().Set("Connection", "close")
        var s, p string
        if c.Config.SslSchema {
            s = "s"
        }
        if c.Site.PortInt != 80 && c.Site.PortInt != 443 {
            p = ":"+c.Site.Port
        }
        dest := "http"+s+"://" + c.Site.Host+p + req.URL.Path
        if len(req.URL.RawQuery) > 0 {
            dest += "?" + req.URL.RawQuery
        }
        http.Redirect(w, req, dest, http.StatusMovedPermanently)
        return
    }
    }

    // Deflect malformed requests
    if len(req.URL.Path) == 0 || req.URL.Path[0] != '/' || (!c.Config.LooseHost && shost != c.Site.Host) {
        malformedRequest(3)
        return
    }
    r.suspScan(req)

    // Indirect the default route onto a different one
    if req.URL.Path == "/" {
        req.URL.Path = c.Config.DefaultPath
    }
    //log.Print("URL.Path: ", req.URL.Path)
    prefix := req.URL.Path[0:strings.IndexByte(req.URL.Path[1:],'/') + 1]

    // TODO: Use the same hook table as downstream
    hTbl := c.GetHookTable()
    skip, ferr := c.H_router_after_filters_hook(hTbl, w, req, prefix)
    if skip || ferr != nil {
        return
    }

    if prefix != "/ws" {
        h := w.Header()
        h.Set("X-Frame-Options", "deny")
        h.Set("X-XSS-Protection", "1; mode=block") // TODO: Remove when we add a CSP? CSP's are horrendously glitchy things, tread with caution before removing
        h.Set("X-Content-Type-Options", "nosniff")
        if c.Config.RefNoRef || !c.Config.SslSchema {
            h.Set("Referrer-Policy","no-referrer")
        } else {
            h.Set("Referrer-Policy","strict-origin")
        }
        h.Set("Permissions-Policy","interest-cohort=()")
    }
    
    if c.Dev.SuperDebug {
        r.DumpRequest(req,"before routes.StaticFile")
    }
    // Increment the request counter
    if !c.Config.DisableAnalytics {
        co.GlobalViewCounter.Bump()
    }
    
    if prefix == "/s" { //old prefix: /static
        if !c.Config.DisableAnalytics {
            co.RouteViewCounter.Bump({{index .AllRouteMap "routes.StaticFile"}})
        }
        routes.StaticFile(w, req)
        return
    }
    // TODO: Handle JS routes
    if atomic.LoadInt32(&c.IsDBDown) == 1 {
        c.DatabaseError(w, req)
        return
    }
    if c.Dev.SuperDebug {
        r.reqLogger.Print("before PreRoute")
    }

    /*if c.Dev.QuicPort != 0 {
        sQuicPort := strconv.Itoa(c.Dev.QuicPort)
        w.Header().Set("Alt-Svc", "quic=\":"+sQuicPort+"\"; ma=2592000; v=\"44,43,39\", h3-23=\":"+sQuicPort+"\"; ma=3600, h3-24=\":"+sQuicPort+"\"; ma=3600, h2=\":443\"; ma=3600")
    }*/

    // Track the user agents. Unfortunately, everyone pretends to be Mozilla, so this'll be a little less efficient than I would like.
    // TODO: Add a setting to disable this?
    // TODO: Use a more efficient detector instead of smashing every possible combination in
    // TODO: Make this testable
    var agent int
    if !c.Config.DisableAnalytics {
    
    ua := strings.TrimSpace(strings.Replace(strings.TrimPrefix(req.UserAgent(),"Mozilla/5.0 ")," Safari/537.36","",-1)) // Noise, no one's going to be running this and it would require some sort of agent ranking system to determine which identifier should be prioritised over another
    if ua == "" {
        co.AgentViewCounter.Bump({{.AllAgentMap.blank}})
        r.unknownUA(req)
    } else {        
        // WIP UA Parser
        //var ii = uaBufPool.Get()
        var buf []byte
        //if ii != nil {
        //    buf = ii.([]byte)
        //}
        var items []string
        var os int
        for _, it := range uutils.StringToBytes(ua) {
            if (it > 64 && it < 91) || (it > 96 && it < 123) || (it > 47 && it < 58) || it == '_' {
                // TODO: Store an index and slice that instead?
                buf = append(buf, it)
            } else if it == ' ' || it == '(' || it == ')' || it == '-' || it == ';' || it == ':' || it == '.' || it == '+' || it == '~' || it == '@' /*|| (it == ':' && bytes.Equal(buf,[]byte("http")))*/ || it == ',' || it == '/' {
                //log.Print("buf: ",string(buf))
                //log.Print("it: ",string(it))
                if len(buf) != 0 {
                    if len(buf) > 2 {
                        // Use an unsafe zero copy conversion here just to use the switch, it's not safe for this string to escape from here, as it will get mutated, so do a regular string conversion in append
                        switch(uutils.BytesToString(buf)) {
                        case "Windows":
                            os = {{.AllOSMap.windows}}
                        case "Linux":
                            os = {{.AllOSMap.linux}}
                        case "Mac":
                            os = {{.AllOSMap.mac}}
                        case "iPhone":
                            os = {{.AllOSMap.iphone}}
                        case "Android":
                            os = {{.AllOSMap.android}}
                        case "like","compatible","NT","X","com","KHTML":
                            // Skip these words
                        default:
                            //log.Print("append buf")
                            items = append(items, string(buf))
                        }
                    }
                    //log.Print("reset buf")
                    buf = buf[:0]
                }
            } else {
                // TODO: Test this
                items = items[:0]
                if c.Config.DisableSuspLog {
                    r.reqLogger.Print("Illegal char "+strconv.Itoa(int(it))+" in UA\nUA Buf: ", buf,"\nUA Buf String: ", string(buf))
                } else {
                    r.SuspiciousRequest(req,"Illegal char "+strconv.Itoa(int(it))+" in UA")
                    r.reqLogger.Print("UA Buf: ", buf,"\nUA Buf String: ", string(buf))
                }
                break
            }
        }
        //uaBufPool.Put(buf)

        // Iterate over this in reverse as the real UA tends to be on the right side
        for i := len(items) - 1; i >= 0; i-- {
            //fAgent, ok := markToAgent[items[i]]
            fAgent, ok := markToID[items[i]]
            if ok {
                agent = fAgent
                if agent != {{.AllAgentMap.safari}} {
                    break
                }
            }
        }
        if c.Dev.SuperDebug {
            r.reqLogger.Print("parsed agent: ", agent,"\nos: ", os)
            r.reqLogger.Printf("items: %+v\n",items)
            /*for _, it := range items {
                r.reqLogger.Printf("it: %+v\n",string(it))
            }*/
        }
        
        // Special handling
        switch(agent) {
        case {{.AllAgentMap.chrome}}:
            if os == {{.AllOSMap.android}} {
                agent = {{.AllAgentMap.androidchrome}}
            }
        case {{.AllAgentMap.safari}}:
            if os == {{.AllOSMap.iphone}} {
                agent = {{.AllAgentMap.mobilesafari}}
            }
        case {{.AllAgentMap.trident}}:
            // Hack to support IE11, change this after we start logging versions
            if strings.Contains(ua,"rv:11") {
                agent = {{.AllAgentMap.internetexplorer}}
            }
        case {{.AllAgentMap.zgrab}}:
            w.WriteHeader(200) // 400
            w.Write([]byte(""))
            r.DumpRequest(req,"Blocked Scanner")
            co.AgentViewCounter.Bump({{.AllAgentMap.zgrab}})
            return
        }
        
        if agent == 0 {
            //co.AgentViewCounter.Bump({{.AllAgentMap.unknown}})
            r.unknownUA(req)
        }// else {
            //co.AgentViewCounter.Bump(agentMapEnum[agent])
            co.AgentViewCounter.Bump(agent)
        //}
        co.OSViewCounter.Bump(os)
    }

    // TODO: Do we want to track missing language headers too? Maybe as it's own type, e.g. "noheader"?
    // TODO: Default to anything other than en, if anything else is present, to avoid over-representing it for multi-linguals?
    lang := req.Header.Get("Accept-Language")
    if lang != "" {
        // TODO: Reduce allocs here
        lLang := strings.Split(strings.TrimSpace(lang),"-")
        tLang := strings.Split(strings.Split(lLang[0],";")[0],",")
        c.DebugDetail("tLang:", tLang)
        var llLang string
        for _, seg := range tLang {
            if seg == "*" {
                continue
            }
            llLang = seg
            break
        }
        c.DebugDetail("llLang:", llLang)
        if !co.LangViewCounter.Bump(llLang) {
            r.DumpRequest(req,"Invalid ISO Code")
        }
    } else {
        co.LangViewCounter.Bump2(0)
    }

    if !c.Config.RefNoTrack {
        ae := req.Header.Get("Accept-Encoding")
        likelyBot := ae == "gzip" || ae == ""
        if !likelyBot {
            ref := req.Header.Get("Referer") // Check the 'referrer' header too? :P
            // TODO: Extend the effects of DNT elsewhere?
            if ref != "" && req.Header.Get("DNT") != "1" {
                // ? Optimise this a little?
                ref = strings.TrimPrefix(strings.TrimPrefix(ref,"http://"),"https://")
                ref = strings.Split(ref,"/")[0]
                portless := strings.Split(ref,":")[0]
                // TODO: Handle c.Site.Host in uppercase too?
                if portless != "localhost" && portless != "127.0.0.1" && portless != c.Site.Host {
                    r.DumpRequest(req,"Ref Route")
                    co.ReferrerTracker.Bump(ref)
                }
            }
        }
    }

    }
    
    // Deal with the session stuff, etc.
    ucpy, ok := c.PreRoute(w, req)
    if !ok {
        return
    }
    user := &ucpy
    user.LastAgent = agent
    if c.Dev.SuperDebug {
        r.reqLogger.Print(
            "after PreRoute\n" +
            "routeMapEnum: ", routeMapEnum)
    }
    //log.Println("req: ", req)

    // Disable Gzip when SSL is disabled for security reasons?
    if prefix != "/ws" {
        ae := req.Header.Get("Accept-Encoding")
        /*if strings.Contains(ae, "br") {
            h := w.Header()
            h.Set("Content-Encoding", "br")
            var ii = brPool.Get()
            var igzw *brotli.Writer
            if ii == nil {
                igzw = brotli.NewWriter(w)
            } else {
                igzw = ii.(*brotli.Writer)
                igzw.Reset(w)
            }
            gzw := c.BrResponseWriter{Writer: igzw, ResponseWriter: w}
            defer func() {
                //h := w.Header()
                if h.Get("Content-Encoding") == "br" && h.Get("X-I") == "" {
                    //log.Print("push br close")
                    igzw := gzw.Writer.(*brotli.Writer)
                    igzw.Close()
                    brPool.Put(igzw)
                }
            }()
            w = gzw
        } else */if strings.Contains(ae, "gzip") {
            h := w.Header()
            h.Set("Content-Encoding", "gzip")
            var ii = gzipPool.Get()
            var igzw *gzip.Writer
            if ii == nil {
                igzw = gzip.NewWriter(w)
            } else {
                igzw = ii.(*gzip.Writer)
                igzw.Reset(w)
            }
            gzw := c.GzipResponseWriter{Writer: igzw, ResponseWriter: w}
            defer func() {
                //h := w.Header()
                if h.Get("Content-Encoding") == "gzip" && h.Get("X-I") == "" {
                    //log.Print("push gzip close")
                    igzw := gzw.Writer.(*gzip.Writer)
                    igzw.Close()
                    gzipPool.Put(igzw)
                }
            }()
            w = gzw
        }
    }

    skip, ferr = c.H_router_pre_route_hook(hTbl, w, req, user, prefix)
    if skip || ferr != nil {
        r.handleError(ferr,w,req,user)
        return
    }
    var extraData string
    if req.URL.Path[len(req.URL.Path) - 1] != '/' {
        extraData = req.URL.Path[strings.LastIndexByte(req.URL.Path,'/') + 1:]
        req.URL.Path = req.URL.Path[:strings.LastIndexByte(req.URL.Path,'/') + 1]
    }
    ferr = r.routeSwitch(w, req, user, prefix, extraData)
    if ferr != nil {
        r.handleError(ferr,w,req,user)
        return
    }
    /*if !c.Config.DisableAnalytics {
        co.RouteViewCounter.Bump(id)
    }*/

    hTbl.VhookNoRet("router_end", w, req, user, prefix, extraData)
    //c.StoppedServer("Profile end")
}
    
func (r *GenRouter) routeSwitch(w http.ResponseWriter, req *http.Request, user *c.User, prefix, extraData string) /*(id int, orerr */c.RouteError/*)*/ {
    var err c.RouteError
    cn := uutils.Nanotime()
    switch(prefix) {` + out + `
        /*case "/sitemaps": // TODO: Count these views
            req.URL.Path += extraData
            err = sitemapSwitch(w,req)*/
        // ! Temporary fix for certain bots
        case "/static":
            w.Header().Set("Connection", "close")
            http.Redirect(w, req, "/s/"+extraData, http.StatusTemporaryRedirect)
        case "/uploads":
            if extraData == "" {
                co.RouteViewCounter.Bump3({{index .AllRouteMap "routes.UploadedFile"}}, cn)
                return c.NotFound(w,req,nil)
            }
            w = r.responseWriter(w)
            req.URL.Path += extraData
            // TODO: Find a way to propagate errors up from this?
            r.UploadHandler(w,req) // TODO: Count these views
            co.RouteViewCounter.Bump3({{index .AllRouteMap "routes.UploadedFile"}}, cn)
            return nil
        case "":
            // Stop the favicons, robots.txt file, etc. resolving to the topics list
            // TODO: Add support for favicons and robots.txt files
            switch(extraData) {
                case "robots.txt":
                    co.RouteViewCounter.Bump3({{index .AllRouteMap "routes.RobotsTxt"}}, cn)
                    return routes.RobotsTxt(w,req)
                case "favicon.ico":
                    w = r.responseWriter(w)
                    req.URL.Path = "/s/favicon.ico"
                    co.RouteViewCounter.Bump3({{index .AllRouteMap "routes.Favicon"}}, cn)
                    routes.StaticFile(w,req)
                    return nil
                case "opensearch.xml":
                    co.RouteViewCounter.Bump3({{index .AllRouteMap "routes.OpenSearchXml"}}, cn)
                    return routes.OpenSearchXml(w,req)
                /*case "sitemap.xml":
                    co.RouteViewCounter.Bump3({{index .AllRouteMap "routes.SitemapXml"}}, cn)
                    return routes.SitemapXml(w,req)*/
            }
            co.RouteViewCounter.Bump({{index .AllRouteMap "routes.Error"}})
            return c.NotFound(w,req,nil)
        default:
            // A fallback for dynamic routes, e.g. ones declared by plugins
            r.RLock()
            h, ok := r.extraRoutes[req.URL.Path]
            r.RUnlock()
            req.URL.Path += extraData
            
            if ok {
                // TODO: Be more specific about *which* dynamic route it is
                co.RouteViewCounter.Bump({{index .AllRouteMap "routes.DynamicRoute"}})
                return h(w,req,user)
            }
            co.RouteViewCounter.Bump3({{index .AllRouteMap "routes.BadRoute"}}, cn)

            if !c.Config.DisableSuspLog {
            lp := strings.ToLower(req.URL.Path)
            if strings.Contains(lp,"w") {
                if strings.Contains(lp,"wp") || strings.Contains(lp,"wordpress") || strings.Contains(lp,"wget") || strings.Contains(lp,"wp-") {
                    r.SuspiciousRequest(req,"Bad Route")
                    return c.MicroNotFound(w,req)
                }
            }
            if strings.Contains(lp,"admin") || strings.Contains(lp,"sql") || strings.Contains(lp,"manage") || strings.Contains(lp,"//") || strings.Contains(lp,"\\\\") || strings.Contains(lp,"config") || strings.Contains(lp,"setup") || strings.Contains(lp,"install") || strings.Contains(lp,"update") || strings.Contains(lp,"php") || strings.Contains(lp,"pl") || strings.Contains(lp,"include") || strings.Contains(lp,"vendor") || strings.Contains(lp,"bin") || strings.Contains(lp,"system") || strings.Contains(lp,"eval") || strings.Contains(lp,"config") {
                r.SuspiciousRequest(req,"Bad Route")
                return c.MicroNotFound(w,req)
            }
            }

            if !c.Config.DisableBadRouteLog {
                r.DumpRequest(req,"Bad Route")
            }
            ae := req.Header.Get("Accept-Encoding")
            likelyBot := ae == "gzip" || ae == ""
            if likelyBot {
                return c.MicroNotFound(w,req)
            }
            return c.NotFound(w,req,nil)
    }
    return err
}
`
    tmpl := template.Must(template.New("router").Parse(fileData))
    var b bytes.Buffer
    if err := tmpl.Execute(&b, tmplVars); err != nil {
        log.Fatal(err)
    }

    writeFile("./gen_router.go", b.String())
    log.Println("Successfully generated the router")
}

func writeFile(name, content string) {
    f, e := os.Create(name)
    if e != nil {
        log.Fatal(e)
    }
    _, e = f.WriteString(content)
    if e != nil {
        log.Fatal(e)
    }
    if e = f.Sync(); e != nil {
        log.Fatal(e)
    }
    if e = f.Close(); e != nil {
        log.Fatal(e)
    }
}