quick integration of ipcc service

bskyweb/cmd/bskyweb/main.go

@@ -60,6 +60,12 @@ func run(args []string) {
 					Value:    "",
 					EnvVars:  []string{"LINK_HOST"},
 				},
+				&cli.StringFlag{
+					Name:    "ipcc-host",
+					Usage:   "scheme, hostname, and port of ipcc service",
+					Value:   "https://localhost:8730",
+					EnvVars: []string{"IPCC_HOST", "IPCC_HOST"},
+				},
 				&cli.BoolFlag{
 					Name:     "debug",
 					Usage:    "Enable debug mode",

bskyweb/cmd/bskyweb/server.go

@@ -1,12 +1,17 @@
 package main
 
 import (
+	"bytes"
 	"context"
 	"crypto/subtle"
+	"crypto/tls"
+	"encoding/base64"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io/fs"
 	"net/http"
+	"net/netip"
 	"net/url"
 	"os"
 	"os/signal"
@@ -41,6 +46,7 @@ type Config struct {
 	appviewHost string
 	ogcardHost  string
 	linkHost    string
+	ipccHost    string
 }
 
 func serve(cctx *cli.Context) error {
@@ -49,6 +55,7 @@ func serve(cctx *cli.Context) error {
 	appviewHost := cctx.String("appview-host")
 	ogcardHost := cctx.String("ogcard-host")
 	linkHost := cctx.String("link-host")
+	ipccHost := cctx.String("ipcc-host")
 	basicAuthPassword := cctx.String("basic-auth-password")
 
 	// Echo
@@ -91,6 +98,7 @@ func serve(cctx *cli.Context) error {
 			appviewHost: appviewHost,
 			ogcardHost:  ogcardHost,
 			linkHost:    linkHost,
+			ipccHost:    ipccHost,
 		},
 	}
 
@@ -261,6 +269,9 @@ func serve(cctx *cli.Context) error {
 	e.GET("/starter-pack/:handleOrDID/:rkey", server.WebStarterPack)
 	e.GET("/start/:handleOrDID/:rkey", server.WebStarterPack)
 
+	// ipcc
+	e.GET("/ipcc", server.WebIpCC)
+
 	if linkHost != "" {
 		linkUrl, err := url.Parse(linkHost)
 		if err != nil {
@@ -520,3 +531,61 @@ func (srv *Server) WebProfile(c echo.Context) error {
 	data["requestHost"] = req.Host
 	return c.Render(http.StatusOK, "profile.html", data)
 }
+
+type IPCCRequest struct {
+	IP string `json:"ip"`
+}
+type IPCCResponse struct {
+	CC string `json:"countryCode"`
+}
+
+func (srv *Server) WebIpCC(c echo.Context) error {
+	realIP := c.RealIP()
+	addr, err := netip.ParseAddr(realIP)
+	if err != nil {
+		log.Warnf("could not parse IP %q %s", realIP, err)
+		return c.JSON(400, IPCCResponse{})
+	}
+	var request []byte
+	if addr.Is4() {
+		ip4 := addr.As4()
+		var dest [8]byte
+		base64.StdEncoding.Encode(dest[:], ip4[:])
+		request, _ = json.Marshal(IPCCRequest{IP: string(dest[:])})
+	} else if addr.Is6() {
+		ip6 := addr.As16()
+		var dest [24]byte
+		base64.StdEncoding.Encode(dest[:], ip6[:])
+		request, _ = json.Marshal(IPCCRequest{IP: string(dest[:])})
+	}
+
+	ipccUrlBuilder, err := url.Parse(srv.cfg.ipccHost)
+	if err != nil {
+		log.Errorf("ipcc misconfigured bad url %s", err)
+		return c.JSON(500, IPCCResponse{})
+	}
+	ipccUrlBuilder.Path = "ipccdata.IpCcService/Lookup"
+	ipccUrl := ipccUrlBuilder.String()
+	cl := http.Client{
+		Transport: &http.Transport{
+			TLSClientConfig: &tls.Config{
+				InsecureSkipVerify: true,
+			},
+		},
+	}
+	postBodyReader := bytes.NewReader(request)
+	response, err := cl.Post(ipccUrl, "application/json", postBodyReader)
+	if err != nil {
+		log.Warnf("ipcc backend error %s", err)
+		return c.JSON(500, IPCCResponse{})
+	}
+	defer response.Body.Close()
+	dec := json.NewDecoder(response.Body)
+	var outResponse IPCCResponse
+	err = dec.Decode(&outResponse)
+	if err != nil {
+		log.Warnf("ipcc bad response %s", err)
+		return c.JSON(500, IPCCResponse{})
+	}
+	return c.JSON(200, outResponse)
+}