691 lines
19 KiB
Go
691 lines
19 KiB
Go
/* WIP Under Construction */
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package main
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import (
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"bytes"
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"log"
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"os"
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"strconv"
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"text/template"
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)
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var routeList []*RouteImpl
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var routeGroups []*RouteGroup
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type TmplVars struct {
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RouteList []*RouteImpl
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RouteGroups []*RouteGroup
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AllRouteNames []string
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AllRouteMap map[string]int
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AllAgentNames []string
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AllAgentMap map[string]int
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AllOSNames []string
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AllOSMap map[string]int
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}
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func main() {
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log.Println("Generating the router...")
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// Load all the routes...
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routes()
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var tmplVars = TmplVars{
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RouteList: routeList,
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RouteGroups: routeGroups,
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}
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var allRouteNames []string
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var allRouteMap = make(map[string]int)
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var out string
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var mapIt = func(name string) {
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allRouteNames = append(allRouteNames, name)
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allRouteMap[name] = len(allRouteNames) - 1
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}
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var countToIndents = func(indent int) (indentor string) {
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for i := 0; i < indent; i++ {
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indentor += "\t"
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}
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return indentor
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}
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var runBefore = func(runnables []Runnable, indent int) (out string) {
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var indentor = countToIndents(indent)
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if len(runnables) > 0 {
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for _, runnable := range runnables {
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if runnable.Literal {
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out += "\n\t" + indentor + runnable.Contents
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} else {
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out += "\n" + indentor + "err = common." + runnable.Contents + "(w,req,user)\n" +
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indentor + "if err != nil {\n" +
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indentor + "\trouter.handleError(err,w,req,user)\n" +
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indentor + "\treturn\n" +
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indentor + "}\n" + indentor
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}
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}
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}
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return out
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}
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for _, route := range routeList {
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mapIt(route.Name)
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var end = len(route.Path) - 1
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out += "\n\t\tcase \"" + route.Path[0:end] + "\":"
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out += runBefore(route.RunBefore, 4)
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out += "\n\t\t\tcounters.RouteViewCounter.Bump(" + strconv.Itoa(allRouteMap[route.Name]) + ")"
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out += "\n\t\t\terr = " + route.Name + "(w,req,user"
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for _, item := range route.Vars {
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out += "," + item
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}
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out += `)
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if err != nil {
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router.handleError(err,w,req,user)
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}`
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}
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for _, group := range routeGroups {
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var end = len(group.Path) - 1
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out += "\n\t\tcase \"" + group.Path[0:end] + "\":"
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out += runBefore(group.RunBefore, 3)
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out += "\n\t\t\tswitch(req.URL.Path) {"
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var defaultRoute = blankRoute()
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for _, route := range group.RouteList {
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if group.Path == route.Path {
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defaultRoute = route
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continue
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}
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mapIt(route.Name)
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out += "\n\t\t\t\tcase \"" + route.Path + "\":"
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if len(route.RunBefore) > 0 {
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skipRunnable:
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for _, runnable := range route.RunBefore {
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for _, gRunnable := range group.RunBefore {
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if gRunnable.Contents == runnable.Contents {
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continue
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}
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// TODO: Stop hard-coding these
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if gRunnable.Contents == "AdminOnly" && runnable.Contents == "MemberOnly" {
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continue skipRunnable
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}
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if gRunnable.Contents == "AdminOnly" && runnable.Contents == "SuperModOnly" {
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continue skipRunnable
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}
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if gRunnable.Contents == "SuperModOnly" && runnable.Contents == "MemberOnly" {
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continue skipRunnable
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}
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}
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if runnable.Literal {
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out += "\n\t\t\t\t\t" + runnable.Contents
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} else {
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out += `
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err = common.` + runnable.Contents + `(w,req,user)
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if err != nil {
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router.handleError(err,w,req,user)
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return
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}
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`
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}
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}
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}
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out += "\n\t\t\t\t\tcounters.RouteViewCounter.Bump(" + strconv.Itoa(allRouteMap[route.Name]) + ")"
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out += "\n\t\t\t\t\terr = " + route.Name + "(w,req,user"
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for _, item := range route.Vars {
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out += "," + item
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}
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out += ")"
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}
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if defaultRoute.Name != "" {
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mapIt(defaultRoute.Name)
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out += "\n\t\t\t\tdefault:"
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out += runBefore(defaultRoute.RunBefore, 4)
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out += "\n\t\t\t\t\tcounters.RouteViewCounter.Bump(" + strconv.Itoa(allRouteMap[defaultRoute.Name]) + ")"
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out += "\n\t\t\t\t\terr = " + defaultRoute.Name + "(w,req,user"
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for _, item := range defaultRoute.Vars {
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out += ", " + item
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}
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out += ")"
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}
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out += `
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}
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if err != nil {
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router.handleError(err,w,req,user)
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}`
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}
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// Stubs for us to refer to these routes through
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mapIt("routeDynamic")
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mapIt("routeUploads")
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mapIt("routes.StaticFile")
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mapIt("BadRoute")
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tmplVars.AllRouteNames = allRouteNames
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tmplVars.AllRouteMap = allRouteMap
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tmplVars.AllOSNames = []string{
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"unknown",
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"windows",
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"linux",
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"mac",
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"android",
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"iphone",
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}
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tmplVars.AllOSMap = make(map[string]int)
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for id, os := range tmplVars.AllOSNames {
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tmplVars.AllOSMap[os] = id
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}
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tmplVars.AllAgentNames = []string{
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"unknown",
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"firefox",
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"chrome",
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"opera",
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"safari",
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"edge",
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"internetexplorer",
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"trident", // Hack to support IE11
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"androidchrome",
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"mobilesafari",
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"samsung",
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"ucbrowser",
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"googlebot",
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"yandex",
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"bing",
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"baidu",
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"duckduckgo",
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"seznambot",
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"discord",
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"twitter",
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"cloudflare",
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"uptimebot",
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"slackbot",
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"discourse",
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"lynx",
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"blank",
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"malformed",
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"suspicious",
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"zgrab",
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}
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tmplVars.AllAgentMap = make(map[string]int)
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for id, agent := range tmplVars.AllAgentNames {
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tmplVars.AllAgentMap[agent] = id
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}
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var fileData = `// Code generated by. DO NOT EDIT.
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/* This file was automatically generated by the software. Please don't edit it as your changes may be overwritten at any moment. */
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package main
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import (
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"log"
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"strings"
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"strconv"
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"sync"
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"errors"
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"net/http"
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"./common"
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"./common/counters"
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"./routes"
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)
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var ErrNoRoute = errors.New("That route doesn't exist.")
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// TODO: What about the /uploads/ route? x.x
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var RouteMap = map[string]interface{}{ {{range .AllRouteNames}}
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"{{.}}": {{.}},{{end}}
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}
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// ! NEVER RELY ON THESE REMAINING THE SAME BETWEEN COMMITS
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var routeMapEnum = map[string]int{ {{range $index, $element := .AllRouteNames}}
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"{{$element}}": {{$index}},{{end}}
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}
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var reverseRouteMapEnum = map[int]string{ {{range $index, $element := .AllRouteNames}}
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{{$index}}: "{{$element}}",{{end}}
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}
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var osMapEnum = map[string]int{ {{range $index, $element := .AllOSNames}}
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"{{$element}}": {{$index}},{{end}}
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}
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var reverseOSMapEnum = map[int]string{ {{range $index, $element := .AllOSNames}}
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{{$index}}: "{{$element}}",{{end}}
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}
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var agentMapEnum = map[string]int{ {{range $index, $element := .AllAgentNames}}
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"{{$element}}": {{$index}},{{end}}
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}
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var reverseAgentMapEnum = map[int]string{ {{range $index, $element := .AllAgentNames}}
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{{$index}}: "{{$element}}",{{end}}
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}
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var markToAgent = map[string]string{
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"OPR":"opera",
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"Chrome":"chrome",
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"Firefox":"firefox",
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"MSIE":"internetexplorer",
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"Trident":"trident", // Hack to support IE11
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"Edge":"edge",
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"Lynx":"lynx", // There's a rare android variant of lynx which isn't covered by this
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"SamsungBrowser":"samsung",
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"UCBrowser":"ucbrowser",
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"Google":"googlebot",
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"Googlebot":"googlebot",
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"yandex": "yandex", // from the URL
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"DuckDuckBot":"duckduckgo",
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"Baiduspider":"baidu",
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"bingbot":"bing",
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"BingPreview":"bing",
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"SeznamBot":"seznambot",
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"CloudFlare":"cloudflare", // Track alwayson specifically in case there are other bots?
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"Uptimebot":"uptimebot",
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"Slackbot":"slackbot",
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"Discordbot":"discord",
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"Twitterbot":"twitter",
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"Discourse":"discourse",
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"zgrab":"zgrab",
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}
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/*var agentRank = map[string]int{
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"opera":9,
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"chrome":8,
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"safari":1,
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}*/
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// TODO: Stop spilling these into the package scope?
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func init() {
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counters.SetRouteMapEnum(routeMapEnum)
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counters.SetReverseRouteMapEnum(reverseRouteMapEnum)
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counters.SetAgentMapEnum(agentMapEnum)
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counters.SetReverseAgentMapEnum(reverseAgentMapEnum)
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counters.SetOSMapEnum(osMapEnum)
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counters.SetReverseOSMapEnum(reverseOSMapEnum)
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}
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type GenRouter struct {
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UploadHandler func(http.ResponseWriter, *http.Request)
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extraRoutes map[string]func(http.ResponseWriter, *http.Request, common.User) common.RouteError
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sync.RWMutex
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}
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func NewGenRouter(uploads http.Handler) *GenRouter {
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return &GenRouter{
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UploadHandler: http.StripPrefix("/uploads/",uploads).ServeHTTP,
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extraRoutes: make(map[string]func(http.ResponseWriter, *http.Request, common.User) common.RouteError),
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}
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}
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func (router *GenRouter) handleError(err common.RouteError, w http.ResponseWriter, r *http.Request, user common.User) {
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if err.Handled() {
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return
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}
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if err.Type() == "system" {
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common.InternalErrorJSQ(err, w, r, err.JSON())
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return
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}
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common.LocalErrorJSQ(err.Error(), w, r, user,err.JSON())
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}
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func (router *GenRouter) Handle(_ string, _ http.Handler) {
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}
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func (router *GenRouter) HandleFunc(pattern string, handle func(http.ResponseWriter, *http.Request, common.User) common.RouteError) {
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router.Lock()
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defer router.Unlock()
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router.extraRoutes[pattern] = handle
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}
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func (router *GenRouter) RemoveFunc(pattern string) error {
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router.Lock()
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defer router.Unlock()
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_, ok := router.extraRoutes[pattern]
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if !ok {
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return ErrNoRoute
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}
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delete(router.extraRoutes, pattern)
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return nil
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}
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func (router *GenRouter) StripNewlines(data string) string {
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// TODO: Strip out all sub-32s?
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return strings.Replace(strings.Replace(data,"\n","",-1),"\r","",-1)
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}
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func (router *GenRouter) DumpRequest(req *http.Request, prepend string) {
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var heads string
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for key, value := range req.Header {
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for _, vvalue := range value {
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heads += "Header '" + router.StripNewlines(key) + "': " + router.StripNewlines(vvalue) + "!!\n"
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}
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}
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log.Print(prepend +
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"\nUA: " + router.StripNewlines(req.UserAgent()) + "\n" +
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"Method: " + router.StripNewlines(req.Method) + "\n" + heads +
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"req.Host: " + router.StripNewlines(req.Host) + "\n" +
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"req.URL.Path: " + router.StripNewlines(req.URL.Path) + "\n" +
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"req.URL.RawQuery: " + router.StripNewlines(req.URL.RawQuery) + "\n" +
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"req.Referer(): " + router.StripNewlines(req.Referer()) + "\n" +
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"req.RemoteAddr: " + req.RemoteAddr + "\n")
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}
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func (router *GenRouter) SuspiciousRequest(req *http.Request) {
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router.DumpRequest(req,"Suspicious Request")
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counters.AgentViewCounter.Bump({{.AllAgentMap.suspicious}})
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}
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// TODO: Pass the default route or config struct to the router rather than accessing it via a package global
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// TODO: SetDefaultRoute
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// TODO: GetDefaultRoute
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func (router *GenRouter) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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// Redirect www. requests to the right place
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if req.Host == "www." + common.Site.Host {
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w.Header().Set("Connection", "close")
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var s string
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if common.Site.EnableSsl {
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s = "s"
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}
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dest := "http"+s+"://" + req.Host + req.URL.Path
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if len(req.URL.RawQuery) > 0 {
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dest += "?" + req.URL.RawQuery
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}
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http.Redirect(w, req, dest, http.StatusMovedPermanently)
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return
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}
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// Deflect malformed requests
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if len(req.URL.Path) == 0 || req.URL.Path[0] != '/' || req.Host != common.Site.Host {
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w.WriteHeader(200) // 400
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w.Write([]byte(""))
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router.DumpRequest(req,"Malformed Request")
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counters.AgentViewCounter.Bump({{.AllAgentMap.malformed}})
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return
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}
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// TODO: Cover more suspicious strings and at a lower layer than this
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for _, char := range req.URL.Path {
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if char != '&' && !(char > 44 && char < 58) && char != '=' && char != '?' && !(char > 64 && char < 91) && char != '\\' && char != '_' && !(char > 96 && char < 123) {
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router.SuspiciousRequest(req)
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break
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}
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}
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lowerPath := strings.ToLower(req.URL.Path)
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// TODO: Flag any requests which has a dot with anything but a number after that
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if strings.Contains(req.URL.Path,"..") || strings.Contains(req.URL.Path,"--") || strings.Contains(lowerPath,".php") || strings.Contains(lowerPath,".asp") || strings.Contains(lowerPath,".cgi") || strings.Contains(lowerPath,".py") || strings.Contains(lowerPath,".sql") || strings.Contains(lowerPath,".action") {
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router.SuspiciousRequest(req)
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}
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var prefix, extraData string
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prefix = req.URL.Path[0:strings.IndexByte(req.URL.Path[1:],'/') + 1]
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if req.URL.Path[len(req.URL.Path) - 1] != '/' {
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extraData = req.URL.Path[strings.LastIndexByte(req.URL.Path,'/') + 1:]
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req.URL.Path = req.URL.Path[:strings.LastIndexByte(req.URL.Path,'/') + 1]
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}
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if common.Dev.SuperDebug {
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router.DumpRequest(req,"before routes.StaticFile")
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}
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// Increment the request counter
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counters.GlobalViewCounter.Bump()
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if prefix == "/static" {
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counters.RouteViewCounter.Bump({{ index .AllRouteMap "routes.StaticFile" }})
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req.URL.Path += extraData
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routes.StaticFile(w, req)
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return
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}
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if common.Dev.SuperDebug {
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log.Print("before PreRoute")
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}
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// Track the user agents. Unfortunately, everyone pretends to be Mozilla, so this'll be a little less efficient than I would like.
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// TODO: Add a setting to disable this?
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// TODO: Use a more efficient detector instead of smashing every possible combination in
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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
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if ua == "" {
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counters.AgentViewCounter.Bump({{.AllAgentMap.blank}})
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if common.Dev.DebugMode {
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var prepend string
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for _, char := range req.UserAgent() {
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prepend += strconv.Itoa(int(char)) + " "
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}
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router.DumpRequest(req,"Blank UA: " + prepend)
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}
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} else {
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var runeEquals = func(a []rune, b []rune) bool {
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if len(a) != len(b) {
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return false
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}
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for i, item := range a {
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if item != b[i] {
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return false
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}
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}
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return true
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}
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|
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// WIP UA Parser
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var indices []int
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var items []string
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var buffer []rune
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for index, item := range ua {
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if (item > 64 && item < 91) || (item > 96 && item < 123) {
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buffer = append(buffer, item)
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} else if item == ' ' || item == '(' || item == ')' || item == '-' || (item > 47 && item < 58) || item == '_' || item == ';' || item == '.' || item == '+' || (item == ':' && (runeEquals(buffer,[]rune("http")) || runeEquals(buffer,[]rune("rv")))) || item == ',' || item == '/' {
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if len(buffer) != 0 {
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items = append(items, string(buffer))
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indices = append(indices, index - 1)
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buffer = buffer[:0]
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}
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} else {
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// TODO: Test this
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items = items[:0]
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indices = indices[:0]
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router.SuspiciousRequest(req)
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log.Print("UA Buffer: ", buffer)
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log.Print("UA Buffer String: ", string(buffer))
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break
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}
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}
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// Iterate over this in reverse as the real UA tends to be on the right side
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var agent string
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for i := len(items) - 1; i >= 0; i-- {
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fAgent, ok := markToAgent[items[i]]
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if ok {
|
|
agent = fAgent
|
|
if agent != "safari" {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
if common.Dev.SuperDebug {
|
|
log.Print("parsed agent: ", agent)
|
|
}
|
|
|
|
var os string
|
|
for _, mark := range items {
|
|
switch(mark) {
|
|
case "Windows":
|
|
os = "windows"
|
|
case "Linux":
|
|
os = "linux"
|
|
case "Mac":
|
|
os = "mac"
|
|
case "iPhone":
|
|
os = "iphone"
|
|
case "Android":
|
|
os = "android"
|
|
}
|
|
}
|
|
if os == "" {
|
|
os = "unknown"
|
|
}
|
|
if common.Dev.SuperDebug {
|
|
log.Print("os: ", os)
|
|
log.Printf("items: %+v\n",items)
|
|
}
|
|
|
|
// Special handling
|
|
switch(agent) {
|
|
case "chrome":
|
|
if os == "android" {
|
|
agent = "androidchrome"
|
|
}
|
|
case "safari":
|
|
if os == "iphone" {
|
|
agent = "mobilesafari"
|
|
}
|
|
case "trident":
|
|
// Hack to support IE11, change this after we start logging versions
|
|
if strings.Contains(ua,"rv:11") {
|
|
agent = "internetexplorer"
|
|
}
|
|
case "zgrab":
|
|
router.SuspiciousRequest(req)
|
|
}
|
|
|
|
if agent == "" {
|
|
counters.AgentViewCounter.Bump({{.AllAgentMap.unknown}})
|
|
if common.Dev.DebugMode {
|
|
var prepend string
|
|
for _, char := range req.UserAgent() {
|
|
prepend += strconv.Itoa(int(char)) + " "
|
|
}
|
|
router.DumpRequest(req,"Blank UA: " + prepend)
|
|
}
|
|
} else {
|
|
counters.AgentViewCounter.Bump(agentMapEnum[agent])
|
|
}
|
|
counters.OSViewCounter.Bump(osMapEnum[os])
|
|
}
|
|
|
|
// TODO: Do we want to track missing language headers too? Maybe as it's own type, e.g. "noheader"?
|
|
lang := req.Header.Get("Accept-Language")
|
|
if lang != "" {
|
|
lang = strings.TrimSpace(lang)
|
|
lLang := strings.Split(lang,"-")
|
|
common.DebugDetail("lLang:", lLang)
|
|
counters.LangViewCounter.Bump(lLang[0])
|
|
}
|
|
|
|
referrer := req.Header.Get("Referer") // Check the 'referrer' header too? :P
|
|
if referrer != "" {
|
|
// ? Optimise this a little?
|
|
referrer = strings.TrimPrefix(strings.TrimPrefix(referrer,"http://"),"https://")
|
|
referrer = strings.Split(referrer,"/")[0]
|
|
portless := strings.Split(referrer,":")[0]
|
|
if portless != "localhost" && portless != "127.0.0.1" && portless != common.Site.Host {
|
|
counters.ReferrerTracker.Bump(referrer)
|
|
}
|
|
}
|
|
|
|
// Deal with the session stuff, etc.
|
|
user, ok := common.PreRoute(w, req)
|
|
if !ok {
|
|
return
|
|
}
|
|
if common.Dev.SuperDebug {
|
|
log.Print("after PreRoute")
|
|
log.Print("routeMapEnum: ", routeMapEnum)
|
|
}
|
|
|
|
var err common.RouteError
|
|
switch(prefix) {` + out + `
|
|
/*case "/sitemaps": // TODO: Count these views
|
|
req.URL.Path += extraData
|
|
err = sitemapSwitch(w,req)
|
|
if err != nil {
|
|
router.handleError(err,w,req,user)
|
|
}*/
|
|
case "/uploads":
|
|
if extraData == "" {
|
|
common.NotFound(w,req,nil)
|
|
return
|
|
}
|
|
counters.RouteViewCounter.Bump({{.AllRouteMap.routeUploads}})
|
|
req.URL.Path += extraData
|
|
// TODO: Find a way to propagate errors up from this?
|
|
router.UploadHandler(w,req) // TODO: Count these views
|
|
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":
|
|
err = routeRobotsTxt(w,req) // TODO: Count these views
|
|
if err != nil {
|
|
router.handleError(err,w,req,user)
|
|
}
|
|
return
|
|
/*case "sitemap.xml":
|
|
err = routeSitemapXml(w,req) // TODO: Count these views
|
|
if err != nil {
|
|
router.handleError(err,w,req,user)
|
|
}
|
|
return*/
|
|
}
|
|
if extraData != "" {
|
|
common.NotFound(w,req,nil)
|
|
return
|
|
}
|
|
|
|
handle, ok := RouteMap[common.Config.DefaultRoute]
|
|
if !ok {
|
|
// TODO: Make this a startup error not a runtime one
|
|
log.Print("Unable to find the default route")
|
|
common.NotFound(w,req,nil)
|
|
return
|
|
}
|
|
counters.RouteViewCounter.Bump(routeMapEnum[common.Config.DefaultRoute])
|
|
|
|
handle.(func(http.ResponseWriter, *http.Request, common.User) common.RouteError)(w,req,user)
|
|
default:
|
|
// A fallback for the routes which haven't been converted to the new router yet or plugins
|
|
router.RLock()
|
|
handle, ok := router.extraRoutes[req.URL.Path]
|
|
router.RUnlock()
|
|
|
|
if ok {
|
|
counters.RouteViewCounter.Bump({{.AllRouteMap.routeDynamic}}) // TODO: Be more specific about *which* dynamic route it is
|
|
req.URL.Path += extraData
|
|
err = handle(w,req,user)
|
|
if err != nil {
|
|
router.handleError(err,w,req,user)
|
|
}
|
|
return
|
|
}
|
|
|
|
// TODO: Log all bad routes for the admin to figure out where users are going wrong?
|
|
lowerPath := strings.ToLower(req.URL.Path)
|
|
if strings.Contains(lowerPath,"admin") || strings.Contains(lowerPath,"sql") || strings.Contains(lowerPath,"manage") || strings.Contains(lowerPath,"//") || strings.Contains(lowerPath,"\\\\") || strings.Contains(lowerPath,"wp") || strings.Contains(lowerPath,"wordpress") || strings.Contains(lowerPath,"config") || strings.Contains(lowerPath,"setup") || strings.Contains(lowerPath,"install") || strings.Contains(lowerPath,"update") || strings.Contains(lowerPath,"php") {
|
|
router.SuspiciousRequest(req)
|
|
}
|
|
counters.RouteViewCounter.Bump({{.AllRouteMap.BadRoute}})
|
|
common.NotFound(w,req,nil)
|
|
}
|
|
}
|
|
`
|
|
var tmpl = template.Must(template.New("router").Parse(fileData))
|
|
var b bytes.Buffer
|
|
err := tmpl.Execute(&b, tmplVars)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
writeFile("./gen_router.go", string(b.Bytes()))
|
|
log.Println("Successfully generated the router")
|
|
}
|
|
|
|
func writeFile(name string, content string) {
|
|
f, err := os.Create(name)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
_, err = f.WriteString(content)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
f.Sync()
|
|
f.Close()
|
|
}
|