mirror of
https://github.com/arnaucube/blockchainIDsystem.git
synced 2026-02-07 02:56:43 +01:00
added GetBlockchain in REST API of the serverCA, also added the visualization to the serverCA webapp
This commit is contained in:
arnaucode
115
serverCA/blockchain.go
Normal file
115
serverCA/blockchain.go
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@@ -0,0 +1,115 @@
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package main
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import (
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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"net/http"
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"time"
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"github.com/fatih/color"
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)
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type Block struct {
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Hash string `json:"hash"`
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Height int64 `json:"height"`
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Date time.Time `json:"date"`
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PreviousHash string `json:"previoushash"`
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NextHash string `json:"nexthash"`
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Data []Address `json:"data"`
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Emitter string `json:"emitter"` //the ID of the peer that has emmited the block
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}
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type Blockchain struct {
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GenesisBlock string `json:"genesisblock"`
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LastUpdate time.Time `json:"lastupdate"`
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Blocks []Block `json:"blocks"`
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}
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var blockchain Blockchain
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func (bc *Blockchain) getBlockByHash(hash string) (Block, error) {
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for _, block := range bc.Blocks {
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if block.Hash == hash {
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return block, nil
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}
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}
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var b Block
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return b, errors.New("Block Hash not found")
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}
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func (bc *Blockchain) blockExists(block Block) bool {
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for _, b := range bc.Blocks {
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if b.Hash == block.Hash {
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return true
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}
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}
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return false
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}
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func (bc *Blockchain) addBlock(block Block) error {
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if blockchain.blockExists(block) {
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return errors.New("[Error adding Block]: Block already exists in the Blockchain")
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}
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if len(bc.Blocks) > 0 {
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bc.Blocks[len(bc.Blocks)-1].NextHash = block.Hash
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} else {
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bc.GenesisBlock = block.Hash
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}
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bc.Blocks = append(bc.Blocks, block)
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return nil
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}
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func reconstructBlockchainFromBlock(urlAPI string, h string) {
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color.Yellow("reconstructing the blockchain from last block in memory")
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var block Block
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var err error
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block, err = blockchain.getBlockByHash(h)
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check(err)
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if h == "" {
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//no genesis block yet
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color.Green(urlAPI + "/blocks/genesis")
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res, err := http.Get(urlAPI + "/blocks/genesis")
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check(err)
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body, err := ioutil.ReadAll(res.Body)
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check(err)
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err = json.Unmarshal(body, &block)
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check(err)
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color.Yellow("[New Block]: " + block.Hash)
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err = blockchain.addBlock(block)
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check(err)
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} else {
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block.NextHash = h
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}
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for block.NextHash != "" && block.Hash != "" {
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res, err := http.Get(urlAPI + "/blocks/next/" + block.Hash)
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check(err)
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body, err := ioutil.ReadAll(res.Body)
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check(err)
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err = json.Unmarshal(body, &block)
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check(err)
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if block.Hash != "" {
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color.Yellow("[New Block]: " + block.Hash)
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err = blockchain.addBlock(block)
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check(err)
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}
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}
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blockchain.print()
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}
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func (bc *Blockchain) print() {
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color.Green("Printing Blockchain stored in memory")
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color.Green("Genesis Block: " + bc.GenesisBlock)
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for _, b := range bc.Blocks {
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color.Green("Block height:")
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fmt.Println(b.Height)
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color.Green("Hash: " + b.Hash)
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color.Green("Date: " + b.Date.String())
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color.Green("---")
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}
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}
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@@ -32,6 +32,8 @@ func main() {
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//read configuration file
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readConfig("config.json")
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reconstructBlockchainFromBlock("http://"+config.IP+":"+config.ServerRESTPort, "")
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//run thw webserver
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go webserver()
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@@ -21,6 +21,12 @@ var routes = Routes{
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"/peers",
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GetPeers,
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},
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Route{
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"GetBlockchain",
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"GET",
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"/blockchain",
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GetBlockchain,
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},
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}
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type Address struct {
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@@ -37,3 +43,13 @@ func GetPeers(w http.ResponseWriter, r *http.Request) {
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check(err)
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fmt.Fprintln(w, string(jResp))
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}
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func GetBlockchain(w http.ResponseWriter, r *http.Request) {
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fmt.Print("aaaaa: ")
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fmt.Println(blockchain.Blocks[len(blockchain.Blocks)-1].Hash)
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reconstructBlockchainFromBlock("http://"+config.IP+":"+config.ServerRESTPort, blockchain.Blocks[len(blockchain.Blocks)-1].Hash)
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jResp, err := json.Marshal(blockchain)
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check(err)
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fmt.Fprintln(w, string(jResp))
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}
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@@ -1,16 +1,45 @@
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<div class="container">
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<div class="row">
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<div class="col-md-3">
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</div>
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<div class="col-md-6">
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<div class="card">
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{{peerslist.PeerID}}
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<div class="card-body" style="max-height: 500px; overflow-y:scroll;">
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<div ng-repeat="peer in peerslist.peerslist">
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<b>{{peer.id}}</b> - {{peer.role}}
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<br>
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- {{peer.ip}}:{{peer.port}}, {{peer.restport}}
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<hr>
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<div class="card-body">
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<h4 class="card-title">
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Peers
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</h4>
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{{peerslist.PeerID}}
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<div style="max-height: 500px; overflow-y:scroll;">
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<div ng-repeat="peer in peerslist.peerslist">
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<b>{{peer.id}}</b> - {{peer.role}}
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<br>
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- {{peer.ip}}:{{peer.port}}, {{peer.restport}}
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<hr>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class="col-md-6">
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<div class="card">
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<div class="card-body">
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<h4 class="card-title">
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Blockchain
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</h4>
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<div style="max-height: 500px; overflow-y:scroll;">
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<div ng-repeat="block in blockchain.blocks">
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Hash: <b>{{block.hash}}</b> - Height: {{block.height}}
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<br>
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Emitter: {{block.emitter}}
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<br>
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Date: {{block.date}}
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<br>
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Data: {{block.data}}
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<br>
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PreviousHash: {{block.previoushash}}
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<br>
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NextHash: {{block.nexthash}}
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<hr>
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</div>
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</div>
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</div>
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</div>
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@@ -19,4 +19,14 @@ angular.module('app.main', ['ngRoute'])
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}, function(data, status, headers, config) {
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console.log('data error');
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});
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$scope.blockchain={};
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$http.get(urlapi + 'blockchain')
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.then(function(data, status, headers, config) {
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console.log('data success');
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console.log(data.data);
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$scope.blockchain = data.data;
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}, function(data, status, headers, config) {
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console.log('data error');
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});
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});
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