Extract web framework

12 files changed, 372 insertions, 293 deletions

diff --git a/go.mod b/go.mod
index ccee475..5e96411 100644
--- a/go.mod
+++ b/go.mod
@@ -1,11 +1,9 @@
 module code.crute.me/mcrute/go_ddns_manager
 
-go 1.13
+go 1.15
 
 require (
-        github.com/gin-gonic/gin v1.5.0
+        code.crute.me/mcrute/frame v0.0.0
+        github.com/gin-gonic/gin v1.6.3
         github.com/miekg/dns v1.1.26
-        github.com/spf13/cobra v0.0.5
-        github.com/spf13/viper v1.3.2
-        golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect
 )
diff --git a/go.sum b/go.sum
index 89417d5..7b883a3 100644
--- a/go.sum
+++ b/go.sum
@@ -1,94 +1,360 @@
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-gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
+gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
diff --git a/main.go b/main.go
index 5750da1..351633b 100644
--- a/main.go
+++ b/main.go
@@ -1,21 +1,52 @@
 package main
 
 import (
-        "log"
-        "os"
+        "encoding/json"
+        "io/ioutil"
 
         "github.com/gin-gonic/gin"
-        "github.com/spf13/cobra"
-        "github.com/spf13/viper"
 
-        "code.crute.me/mcrute/go_ddns_manager/util"
+        "code.crute.me/mcrute/frame"
+        "code.crute.me/mcrute/go_ddns_manager/bind"
+        "code.crute.me/mcrute/go_ddns_manager/dns"
         "code.crute.me/mcrute/go_ddns_manager/web"
         "code.crute.me/mcrute/go_ddns_manager/web/controllers"
         "code.crute.me/mcrute/go_ddns_manager/web/middleware"
 )
 
-func makeServer(cfg *web.ServerConfig) *gin.Engine {
-        router := gin.Default()
+func loadConfig(app *frame.WebApp, args []string) (interface{}, error) {
+        zonesFile := app.GetStringArgument("zones_config")
+        secretsFile := app.GetStringArgument("auth_config")
+        server := args[0]
+        view := app.GetStringArgument("view_name")
+
+        scfg := &web.ServerConfig{
+                DNSClient:      &dns.DNSClient{Server: server},
+                AcmeView:       view,
+                DynamicDnsView: view,
+        }
+
+        cfg, err := bind.ParseBINDConfig(zonesFile)
+        if err != nil {
+                return nil, err
+        }
+        scfg.BindConfig = cfg
+
+        fd, err := ioutil.ReadFile(secretsFile)
+        if err != nil {
+                return nil, err
+        }
+
+        if err = json.Unmarshal(fd, scfg); err != nil {
+                return nil, err
+        }
+
+        return scfg, nil
+}
+
+func prepareServer(c interface{}, router *gin.Engine) error {
+        cfg := c.(*web.ServerConfig)
+
         router.Use(middleware.ConfigContextMiddleware(cfg))
 
         router.GET("/reflect-ip", controllers.ReflectIP)
@@ -33,42 +64,38 @@ func makeServer(cfg *web.ServerConfig) *gin.Engine {
                 acme.DELETE("/:id", controllers.DeleteAcmeChallenge)
         }
 
-        return router
+        manage := router.Group("/manage")
+        manage.Use(middleware.ApiAuthMiddleware)
+        {
+                manage.GET("", controllers.ManageRoot)
+
+                views := manage.Group("/views")
+                {
+                        views.GET("", controllers.ListViews)
+                        views.GET("/:view", controllers.ListView)
+                        views.GET("/:view/:zone", controllers.ListZone)
+                }
+        }
+
+        return nil
 }
 
 func main() {
-        cmd := &cobra.Command{
-                Use:   "dns-manage-service [flags] dns-server-ip-port",
-                Short: "DNS manager service",
-                Args:  cobra.MinimumNArgs(1),
-                Run: func(cmd *cobra.Command, args []string) {
-                        cfg, err := web.LoadServerConfig(
-                                viper.GetString("zones_config"),
-                                viper.GetString("auth_config"),
-                                args[0],
-                                viper.GetString("view_name"),
-                        )
-                        if err != nil {
-                                log.Println(err)
-                                os.Exit(1)
-                        }
-
-                        util.GinRun(
-                                makeServer(cfg),
-                                viper.GetBool("debug"),
-                                viper.GetString("listen"))
+        app := &frame.WebApp{
+                Name:        "dns-manage-service",
+                Usage:       "dns-manage-service [flags] dns-server-ip-port",
+                Help:        "DNS manager service",
+                MinArgCount: 1,
+                Arguments: []frame.Argument{
+                        &frame.StringArgument{"zones-config", "z", "cfg/zones.conf", "Bind key and zones config file"},
+                        &frame.StringArgument{"auth-config", "a", "cfg/server_auth.json", "Server auth configuration file"},
+                        &frame.StringArgument{"view-name", "n", "external", "Name of view to update for ACME and DDNS"},
                 },
+                LoadConfig:    loadConfig,
+                PrepareServer: prepareServer,
         }
 
-        util.WrapViper(cmd, "DNS_MANAGE").
-                BindString("zones-config", "z", "cfg/zones.conf", "Bind key and zones config file").
-                BindString("auth-config", "a", "cfg/server_auth.json", "Server auth configuration file").
-                BindString("view-name", "n", "external", "Name of view to update for ACME and DDNS").
-                BindString("listen", "l", ":9090", "Listen address and port").
-                BindBool("debug", "d", false, "Run server in debug mode with debug logs")
-
-        if err := cmd.Execute(); err != nil {
-                log.Println(err)
-                os.Exit(1)
+        if err := app.RunForever(); err != nil {
+                panic(err)
         }
 }
diff --git a/util/file.go b/util/file.go
deleted file mode 100644
index b6fc86f..0000000
--- a/util/file.go
+++ /dev/null
@@ -1,19 +0,0 @@
-package util
-
-import (
-        "io"
-        "io/ioutil"
-)
-
-func WriteReaderToFile(filename string, data io.Reader) error {
-        d, err := ioutil.ReadAll(data)
-        if err != nil {
-                return err
-        }
-
-        if err = ioutil.WriteFile(filename, d, 0644); err != nil {
-                return err
-        }
-
-        return nil
-}
diff --git a/util/gin.go b/util/gin.go
deleted file mode 100644
index 9bba6ee..0000000
--- a/util/gin.go
+++ /dev/null
@@ -1,72 +0,0 @@
-package util
-
-import (
-        "context"
-        "log"
-        "net"
-        "net/http"
-        "os"
-        "os/signal"
-
-        "github.com/gin-gonic/gin"
-)
-
-// Copied from: https://github.com/gin-gonic/gin/blob/59ab588bf597f9f41faee4f217b5659893c2e925/utils.go#L137
-func resolveAddress(addr []string) string {
-        switch len(addr) {
-        case 0:
-                if port := os.Getenv("PORT"); port != "" {
-                        log.Printf("Environment variable PORT=\"%s\"", port)
-                        return ":" + port
-                }
-                log.Printf("Environment variable PORT is undefined. Using port :8080 by default")
-                return ":8080"
-        case 1:
-                return addr[0]
-        default:
-                panic("too many parameters")
-        }
-}
-
-// Runs a gin.Engine instance in a way that can be canceled by an SIGINT
-func GinRun(e *gin.Engine, debug bool, a ...string) {
-        if debug {
-                gin.SetMode(gin.DebugMode)
-        } else {
-                gin.SetMode(gin.ReleaseMode)
-        }
-
-        srv := &http.Server{
-                Addr:    resolveAddress(a),
-                Handler: e,
-        }
-
-        idleConnsClosed := make(chan struct{})
-
-        go func() {
-                sigint := make(chan os.Signal, 1)
-                signal.Notify(sigint, os.Interrupt)
-                <-sigint
-
-                log.Println("Caught SIGINT, shutting down")
-                if err := srv.Shutdown(context.Background()); err != nil {
-                        log.Printf("HTTP server Shutdown: %v", err)
-                }
-
-                close(idleConnsClosed)
-        }()
-
-        log.Printf("Listening and serving HTTP on %s\n", srv.Addr)
-        if err := srv.ListenAndServe(); err != http.ErrServerClosed {
-                log.Fatalf("HTTP server ListenAndServe: %v", err)
-        }
-
-        <-idleConnsClosed
-}
-
-func GetRequestIP(c *gin.Context) net.IP {
-        if xff := c.Request.Header.Get("X-Forwarded-For"); xff != "" {
-                return ParseIP(xff)
-        }
-        return ParseIP(c.Request.RemoteAddr)
-}
diff --git a/util/http.go b/util/http.go
deleted file mode 100644
index 31cd94d..0000000
--- a/util/http.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package util
-
-import (
-        "fmt"
-        "net/http"
-        "net/url"
-)
-
-func MakeURL(r *http.Request, path string, subs ...interface{}) *url.URL {
-        scheme := "https"
-        if r.TLS == nil {
-                scheme = "http"
-        }
-
-        // Always defer to whatever the proxy told us it was doing because this
-        // could be a mullet-VIP in either direction.
-        if fwProto := r.Header.Get("X-Forwarded-Proto"); fwProto != "" {
-                scheme = fwProto
-        }
-
-        return &url.URL{
-                Scheme: scheme,
-                Host:   r.Host,
-                Path:   fmt.Sprintf(path, subs...),
-        }
-}
diff --git a/util/ip.go b/util/ip.go
deleted file mode 100644
index 239973a..0000000
--- a/util/ip.go
+++ /dev/null
@@ -1,32 +0,0 @@
-package util
-
-import (
-        "net"
-        "regexp"
-)
-
-// Matches:
-//  - IPv4: 192.168.1.1
-//  - IPv4 + Port: 192.168.1.1:2020
-//  - IPv6 + Port: [fe80::551f:5aff:49cf:13e4]:2020
-//  - IPv6: fe80::551f:5aff:49cf:13e4
-//
-// Return Order: []string{matched, IPv4, IPv6 (port notation), IPv6 (raw notation), Port
-var ipRegexp = regexp.MustCompile(`(?:((?:\d+\.){3}\d+)|\[([^\]]+)\]|([0-9a-f:]+))(?::(\d+))?`)
-
-func ParseIP(s string) net.IP {
-        ips := ipRegexp.FindStringSubmatch(s)
-        if ips == nil {
-                return nil
-        }
-
-        if ips[1] != "" {
-                return net.ParseIP(ips[1])
-        } else if ips[2] != "" {
-                return net.ParseIP(ips[2])
-        } else if ips[3] != "" {
-                return net.ParseIP(ips[3])
-        } else {
-                return nil
-        }
-}
diff --git a/util/viper.go b/util/viper.go
deleted file mode 100644
index 0f08a6c..0000000
--- a/util/viper.go
+++ /dev/null
@@ -1,36 +0,0 @@
-package util
-
-import (
-        "strings"
-
-        "github.com/spf13/cobra"
-        "github.com/spf13/viper"
-)
-
-type ViperWrap struct {
-        cmd *cobra.Command
-}
-
-func WrapViper(cmd *cobra.Command, prefix string) *ViperWrap {
-        viper.SetEnvPrefix(prefix)
-        viper.AutomaticEnv()
-        return &ViperWrap{cmd}
-}
-
-func (v *ViperWrap) bindViper(name, short string, defaultv interface{}, help string) {
-        vname := strings.ReplaceAll(name, "-", "_")
-        viper.BindPFlag(vname, v.cmd.Flags().Lookup(name))
-        viper.SetDefault(vname, defaultv)
-}
-
-func (v *ViperWrap) BindString(name, short, defaultv, help string) *ViperWrap {
-        v.cmd.Flags().StringP(name, short, defaultv, help)
-        v.bindViper(name, short, defaultv, help)
-        return v
-}
-
-func (v *ViperWrap) BindBool(name, short string, defaultv bool, help string) *ViperWrap {
-        v.cmd.Flags().BoolP(name, short, defaultv, help)
-        v.bindViper(name, short, defaultv, help)
-        return v
-}
diff --git a/web/config.go b/web/config.go
index 2479e38..b307425 100644
--- a/web/config.go
+++ b/web/config.go
@@ -1,8 +1,6 @@
 package web
 
 import (
-        "encoding/json"
-        "io/ioutil"
         "strings"
 
         "code.crute.me/mcrute/go_ddns_manager/bind"
@@ -18,31 +16,6 @@ type ServerConfig struct {
         AcmeSecrets    map[string]map[string]int `json:"ACME"`
 }
 
-func LoadServerConfig(zonesFile, secretsFile, server, view string) (*ServerConfig, error) {
-        scfg := &ServerConfig{
-                DNSClient:      &dns.DNSClient{Server: server},
-                AcmeView:       view,
-                DynamicDnsView: view,
-        }
-
-        cfg, err := bind.ParseBINDConfig(zonesFile)
-        if err != nil {
-                return nil, err
-        }
-        scfg.BindConfig = cfg
-
-        fd, err := ioutil.ReadFile(secretsFile)
-        if err != nil {
-                return nil, err
-        }
-
-        if err = json.Unmarshal(fd, scfg); err != nil {
-                return nil, err
-        }
-
-        return scfg, nil
-}
-
 func (s *ServerConfig) GetDDNSZoneName(k string) string {
         v, _ := s.DDNSSecrets[k]
         return v
diff --git a/web/controllers/acme.go b/web/controllers/acme.go
index 5090b70..457bee6 100644
--- a/web/controllers/acme.go
+++ b/web/controllers/acme.go
@@ -9,8 +9,8 @@ import (
 
         "github.com/gin-gonic/gin"
 
+        "code.crute.me/mcrute/frame"
         "code.crute.me/mcrute/go_ddns_manager/dns"
-        "code.crute.me/mcrute/go_ddns_manager/util"
         "code.crute.me/mcrute/go_ddns_manager/web/middleware"
 )
 
@@ -103,7 +103,7 @@ func CreateAcmeChallenge(c *gin.Context) {
                 return
         }
 
-        url := util.MakeURL(c.Request, "/acme/%s", AcmeChallengeID{
+        url := frame.MakeURL(c.Request, "/acme/%s", AcmeChallengeID{
                 Zone:      zone.Name,
                 Prefix:    prefix,
                 Challenge: ch.Challenge,
diff --git a/web/controllers/ddns.go b/web/controllers/ddns.go
index d476255..201ee0d 100644
--- a/web/controllers/ddns.go
+++ b/web/controllers/ddns.go
@@ -7,8 +7,8 @@ import (
         "github.com/gin-gonic/gin"
         godns "github.com/miekg/dns"
 
+        "code.crute.me/mcrute/frame"
         "code.crute.me/mcrute/go_ddns_manager/dns"
-        "code.crute.me/mcrute/go_ddns_manager/util"
         "code.crute.me/mcrute/go_ddns_manager/web/middleware"
 )
 
@@ -29,7 +29,7 @@ func UpdateDynamicDNS(c *gin.Context) {
                 return
         }
 
-        inip := util.GetRequestIP(c)
+        inip := frame.GetRequestIP(c)
         if inip == nil {
                 log.Println("ddns: Unable to parse IP")
                 c.AbortWithStatus(http.StatusInternalServerError)
diff --git a/web/controllers/reflect_ip.go b/web/controllers/reflect_ip.go
index 199d736..556f15b 100644
--- a/web/controllers/reflect_ip.go
+++ b/web/controllers/reflect_ip.go
@@ -5,11 +5,11 @@ import (
 
         "github.com/gin-gonic/gin"
 
-        "code.crute.me/mcrute/go_ddns_manager/util"
+        "code.crute.me/mcrute/frame"
 )
 
 func ReflectIP(c *gin.Context) {
-        ip := util.GetRequestIP(c)
+        ip := frame.GetRequestIP(c)
         if ip == nil {
                 c.String(http.StatusInternalServerError, "")
                 return