path: root/cmd/swarm/feeds_test.go

// Copyright 2017 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.

package main

import (
    "bytes"
    "encoding/json"
    "io/ioutil"
    "os"
    "testing"

    "github.com/ethereum/go-ethereum/common/hexutil"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/log"
    "github.com/ethereum/go-ethereum/swarm/api"
    swarm "github.com/ethereum/go-ethereum/swarm/api/client"
    swarmhttp "github.com/ethereum/go-ethereum/swarm/api/http"
    "github.com/ethereum/go-ethereum/swarm/storage/feed"
    "github.com/ethereum/go-ethereum/swarm/storage/feed/lookup"
    "github.com/ethereum/go-ethereum/swarm/testutil"
)

func TestCLIFeedUpdate(t *testing.T) {
    srv := swarmhttp.NewTestSwarmServer(t, func(api *api.API) swarmhttp.TestServer {
        return swarmhttp.NewServer(api, "")
    }, nil)
    log.Info("starting a test swarm server")
    defer srv.Close()

    // create a private key file for signing
    privkeyHex := "0000000000000000000000000000000000000000000000000000000000001979"
    privKey, _ := crypto.HexToECDSA(privkeyHex)
    address := crypto.PubkeyToAddress(privKey.PublicKey)

    pkFileName := testutil.TempFileWithContent(t, privkeyHex)
    defer os.Remove(pkFileName)

    // compose a topic. We'll be doing quotes about Miguel de Cervantes
    var topic feed.Topic
    subject := []byte("Miguel de Cervantes")
    copy(topic[:], subject[:])
    name := "quotes"

    // prepare some data for the update
    data := []byte("En boca cerrada no entran moscas")
    hexData := hexutil.Encode(data)

    flags := []string{
        "--bzzapi", srv.URL,
        "--bzzaccount", pkFileName,
        "feed", "update",
        "--topic", topic.Hex(),
        "--name", name,
        hexData}

    // create an update and expect an exit without errors
    log.Info("updating a feed with 'swarm feed update'")
    cmd := runSwarm(t, flags...)
    cmd.ExpectExit()

    // now try to get the update using the client
    client := swarm.NewClient(srv.URL)

    // build the same topic as before, this time
    // we use NewTopic to create a topic automatically.
    topic, err := feed.NewTopic(name, subject)
    if err != nil {
        t.Fatal(err)
    }

    // Feed configures whose updates we will be looking up.
    fd := feed.Feed{
        Topic: topic,
        User:  address,
    }

    // Build a query to get the latest update
    query := feed.NewQueryLatest(&fd, lookup.NoClue)

    // retrieve content!
    reader, err := client.QueryFeed(query, "")
    if err != nil {
        t.Fatal(err)
    }

    retrieved, err := ioutil.ReadAll(reader)
    if err != nil {
        t.Fatal(err)
    }

    // check we retrieved the sent information
    if !bytes.Equal(data, retrieved) {
        t.Fatalf("Received %s, expected %s", retrieved, data)
    }

    // Now retrieve info for the next update
    flags = []string{
        "--bzzapi", srv.URL,
        "feed", "info",
        "--topic", topic.Hex(),
        "--user", address.Hex(),
    }

    log.Info("getting feed info with 'swarm feed info'")
    cmd = runSwarm(t, flags...)
    _, matches := cmd.ExpectRegexp(`.*`) // regex hack to extract stdout
    cmd.ExpectExit()

    // verify we can deserialize the result as a valid JSON
    var request feed.Request
    err = json.Unmarshal([]byte(matches[0]), &request)
    if err != nil {
        t.Fatal(err)
    }

    // make sure the retrieved feed is the same
    if request.Feed != fd {
        t.Fatalf("Expected feed to be: %s, got %s", fd, request.Feed)
    }

    // test publishing a manifest
    flags = []string{
        "--bzzapi", srv.URL,
        "--bzzaccount", pkFileName,
        "feed", "create",
        "--topic", topic.Hex(),
    }

    log.Info("Publishing manifest with 'swarm feed create'")
    cmd = runSwarm(t, flags...)
    _, matches = cmd.ExpectRegexp(`[a-f\d]{64}`)
    cmd.ExpectExit()

    manifestAddress := matches[0] // read the received feed manifest

    // now attempt to lookup the latest update using a manifest instead
    reader, err = client.QueryFeed(nil, manifestAddress)
    if err != nil {
        t.Fatal(err)
    }

    retrieved, err = ioutil.ReadAll(reader)
    if err != nil {
        t.Fatal(err)
    }

    if !bytes.Equal(data, retrieved) {
        t.Fatalf("Received %s, expected %s", retrieved, data)
    }

    // test publishing a manifest for a different user
    flags = []string{
        "--bzzapi", srv.URL,
        "feed", "create",
        "--topic", topic.Hex(),
        "--user", "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", // different user
    }

    log.Info("Publishing manifest with 'swarm feed create' for a different user")
    cmd = runSwarm(t, flags...)
    _, matches = cmd.ExpectRegexp(`[a-f\d]{64}`)
    cmd.ExpectExit()

    manifestAddress = matches[0] // read the received feed manifest

    // now let's try to update that user's manifest which we don't have the private key for
    flags = []string{
        "--bzzapi", srv.URL,
        "--bzzaccount", pkFileName,
        "feed", "update",
        "--manifest", manifestAddress,
        hexData}

    // create an update and expect an error given there is a user mismatch
    log.Info("updating a feed with 'swarm feed update'")
    cmd = runSwarm(t, flags...)
    cmd.ExpectRegexp("Fatal:.*") // best way so far to detect a failure.
    cmd.ExpectExit()
    if cmd.ExitStatus() == 0 {
        t.Fatal("Expected nonzero exit code when updating a manifest with the wrong user. Got 0.")
    }
}