built new service_blockchain_explorer() and updated id_server.py with new HTML template

Author: vesellov

bitdust/blockchain/blockchain_explorer.py

@@ -0,0 +1,393 @@
+import sys
+import time
+import sqlite3
+import base64
+
+#------------------------------------------------------------------------------
+
+if __name__ == '__main__':
+    import os.path as _p
+    sys.path.insert(0, _p.abspath(_p.join(_p.dirname(_p.abspath(sys.argv[0])), '..')))
+    src_dir_path = _p.dirname(_p.dirname(_p.dirname(_p.abspath(sys.argv[0]))))
+    sys.path.insert(0, src_dir_path)
+    sys.path.insert(0, _p.join(src_dir_path, 'bitdust_forks', 'Bismuth'))
+
+#------------------------------------------------------------------------------
+
+from twisted.internet import reactor
+from twisted.web import server, resource
+
+#------------------------------------------------------------------------------
+
+from bitdust.logs import lg
+
+from bitdust.lib import strng
+
+from bitdust.main import settings
+from bitdust.main import config
+
+from bitdust.interface import web_html_template
+
+from bitdust.blockchain import bismuth_node
+
+#------------------------------------------------------------------------------
+
+_Debug = True
+_DebugLevel = 10
+
+#------------------------------------------------------------------------------
+
+_DataDirPath = None
+_ExplorerHost = None
+_ExplorerPort = None
+_WebListener = None
+
+#------------------------------------------------------------------------------
+
+
+def init():
+    global _DataDirPath
+    global _ExplorerHost
+    global _ExplorerPort
+    global _WebListener
+
+    _DataDirPath = settings.ServiceDir('bismuth_blockchain')
+    _ExplorerHost = config.conf().getString('services/blockchain-explorer/host', '127.0.0.1')
+    _ExplorerPort = config.conf().getInt('services/blockchain-explorer/web-port', 19080)
+
+    root = BlockchainRootPage()
+    root.putChild(b'', BlockchainMainPage())
+    try:
+        _WebListener = reactor.listenTCP(_ExplorerPort, server.Site(root))  # @UndefinedVariable
+        if _Debug:
+            lg.out(_DebugLevel, '            have started web server at port %d   hostname=%s' % (_ExplorerPort, strng.to_text(_ExplorerHost)))
+    except:
+        if _Debug:
+            lg.err('exception while trying to listen port ' + str(self.web_port))
+        lg.exc()
+    if _Debug:
+        lg.args(_DebugLevel, data_dir_path=_DataDirPath)
+    return True
+
+
+def shutdown():
+    global _WebListener
+    if _Debug:
+        lg.dbg(_DebugLevel, '')
+    if _WebListener:
+        _WebListener.stopListening()
+        if _Debug:
+            lg.out(_DebugLevel, '            stopped web listener')
+    _WebListener = None
+    return True
+
+
+#------------------------------------------------------------------------------
+
+
+def execute(cursor, query, param):
+    while True:
+        try:
+            cursor.execute(query, param)
+            break
+        except Exception as e:
+            print('Database query: {} {}'.format(cursor, query))
+            print('Database retry reason: {}'.format(e))
+            time.sleep(0.2)
+    return cursor
+
+
+#------------------------------------------------------------------------------
+
+
+class BlockchainMainPage(resource.Resource):
+    def render_GET(self, request):
+        global _ExplorerHost
+
+        page_size = 500
+
+        page_num = request.args.get(b'page', [])
+        if page_num:
+            try:
+                page_num = int(strng.to_text(page_num[0]))
+            except:
+                lg.exc()
+                page_num = 0
+        else:
+            page_num = 0
+
+        page_max = -1
+
+        src = ''
+
+        conn = sqlite3.connect(bismuth_node.nod().ledger_path, timeout=60.0)
+        c = conn.cursor()
+        execute(c, 'SELECT * FROM transactions ORDER BY block_height DESC, timestamp DESC LIMIT ? OFFSET ?;', (
+            page_size,
+            page_size*page_num,
+        ))
+        _all = c.fetchall()
+        c.close()
+        conn.close()
+        conn = None
+        c = None
+
+        view = []
+        b = -1
+        x_old = 'init'
+
+        for x in _all:
+            if int(x[0]) == 1:
+                page_max = page_num
+
+            if x[0] != x_old:
+                color_cell = '#F8F8F8'
+                view.append('<tr><td>&nbsp;</td></tr>')  #block separator
+            else:
+                color_cell = 'white'
+
+            view.append('<tr bgcolor ={}>'.format(color_cell))
+
+            if x[0] != x_old:
+                b = b + 1
+
+            if x_old != x[0]:
+                view.append('<td>{}</td>'.format(x[0]))  #block height
+            else:
+                view.append('<td>{}</td>'.format(x[0]))  #block height
+
+            view.append('<td>{}'.format(time.strftime('%Y/%m/%d %H:%M:%S', time.gmtime(float(x[1])))))
+            view.append('<td>{}&hellip;</td>'.format(x[2][:6]))  #from
+            view.append('<td>{}&hellip;</td>'.format(x[3][:6]))  #to
+            view.append('<td>{0:g}</td>'.format(float(x[4])))  #amount
+
+            if x_old != x[0]:
+                view.append('<td>{}&hellip;</td>'.format(x[7][:6]))  #block hash
+            else:
+                view.append('<td>&nbsp;</td>')  #block hash
+
+            view.append('<td>{0:g}</td>'.format(float(x[8])))  #fee
+            view.append('<td>{0:g}</td>'.format(float(x[9])))  #reward
+
+            view.append('<td>{}{}</td>'.format(x[10][:16], '&hellip;' if len(x[10]) > 16 else ''))  #operation
+            view.append('<td>{}{}</td>'.format(x[11][:24], '&hellip;' if len(x[11]) > 24 else ''))  #openfield
+
+            view.append('<td><a href="/{}">{}&hellip;</a></td>'.format(
+                strng.to_text(base64.b64encode(strng.to_bin(x[5]), altchars=b'-_')),
+                x[5][:6],
+            ))  #TXID
+
+            view.append('</tr>')
+
+            x_old = x[0]
+
+        src += '<div id="ui-blockchain-explorer" class="section bg-light">'
+        src += '<div class="container">\n'
+        src += '<div class="ui-card">\n'
+        src += '<div class="card-body">\n'
+
+        src += '<div class="row justify-content-center">\n'
+        src += '<h1 align=center>BitDust blockchain explorer</h1>\n'
+        src += '</div>\n'
+
+        src += '<div class="row justify-content-center">\n'
+        src += '<ul class="pagination pagination-sm">\n'
+        src += '<li class="page-item">\n'
+        src += '<a class="page-link" href="/?page={}">\n'.format(max(0, page_num - 1))
+        src += '<span aria-hidden="true">&laquo;</span>\n'
+        src += '</a>\n'
+        src += '</li>\n'
+        src += '<li class="page-item">\n'
+        src += '<a class="page-link" href="/?page={}">\n'.format(min(page_max, page_num + 1))
+        src += '<span aria-hidden="true">&raquo;</span>\n'
+        src += '</a>\n'
+        src += '</li>\n'
+        src += '</ul>\n'
+        src += '</div>\n'
+
+        src += '<div class="row justify-content-center">\n'
+
+        src += '<style type="text/css">#blockchain-table td {padding: 0px 5px; font-size: 0.9em; font-family: monospace, monospace; }</style>'
+
+        src += '<table id="blockchain-table" class="table table-responsive">\n'
+
+        src += '<tr bgcolor=white>\n'
+        src += '<td><b>Block</b></td>\n'
+        src += '<td><b>Timestamp</b></td>\n'
+        src += '<td><b>From</b></td>\n'
+        src += '<td><b>To</b></td>\n'
+        src += '<td><b>Amount</b></td>\n'
+        src += '<td><b>Hash</b></td>\n'
+        src += '<td><b>Fee</b></td>\n'
+        src += '<td><b>Reward</b></td>\n'
+        src += '<td><b>Operation</b></td>\n'
+        src += '<td><b>Openfield</b></td>\n'
+        src += '<td><b>TXID</b></td>\n'
+        src += '</tr>\n'
+
+        src += ''.join(view)
+
+        src += '</table>\n'
+        src += '</div>\n'
+
+        src += '<br>\n'
+        src += '<div class="row justify-content-center">\n'
+        src += '<ul class="pagination pagination-sm">\n'
+        src += '<li class="page-item">\n'
+        src += '<a class="page-link" href="/?page={}">\n'.format(max(0, page_num - 1))
+        src += '<span aria-hidden="true">&laquo;</span>\n'
+        src += '</a>\n'
+        src += '</li>\n'
+        src += '<li class="page-item">\n'
+        src += '<a class="page-link" href="/?page={}">\n'.format(min(page_max, page_num + 1))
+        src += '<span aria-hidden="true">&raquo;</span>\n'
+        src += '</a>\n'
+        src += '</li>\n'
+        src += '</ul>\n'
+        src += '</div>\n'
+
+        src += '</div>\n'
+        src += '</div>\n'
+        src += '</div>\n'
+        src += '</div>\n'
+
+        html_src = web_html_template.WEB_ROOT_TEMPLATE % dict(
+            title='BitDust blockchain explorer',
+            site_url='https://bitdust.io',
+            basepath='https://bitdust.io/',
+            wikipath='https://bitdust.io/wiki/',
+            idserverspath='https://identities.bitdust.io/',
+            blockchainpath='https://blockchain.bitdust.io/',
+            div_main_class='main blockchain',
+            div_main_body=src,
+            google_analytics='',
+        )
+        return strng.to_bin(html_src)
+
+
+#------------------------------------------------------------------------------
+
+
+class BlockchainTransactionPage(resource.Resource):
+    def __init__(self, tx_id):
+        resource.Resource.__init__(self)
+        self.tx_id = tx_id
+
+    def render_GET(self, request):
+        src = ''
+        src += '<div id="ui-blockchain-transaction" class="section bg-light">'
+        src += '<div class="container">\n'
+        src += '<div class="ui-card">\n'
+        src += '<div class="card-body">\n'
+
+        try:
+            _t = strng.to_text(base64.b64decode(self.tx_id, altchars='-_'))
+        except:
+            src += '<p align=center>invalid transaction ID</p>\n'
+            src += '</div>\n'
+            src += '</div>\n'
+            src += '</div>\n'
+            src += '</div>\n'
+            html_src = web_html_template.WEB_ROOT_TEMPLATE % dict(
+                title='BitDust blockchain explorer',
+                site_url='https://bitdust.io',
+                basepath='https://bitdust.io/',
+                wikipath='https://bitdust.io/wiki/',
+                idserverspath='https://identities.bitdust.io/',
+                blockchainpath='https://blockchain.bitdust.io/',
+                div_main_class='main blockchain-transaction',
+                div_main_body=src,
+                google_analytics='',
+            )
+            return strng.to_bin(html_src)
+
+        try:
+            conn = sqlite3.connect(bismuth_node.nod().ledger_path, timeout=60.0)
+            c = conn.cursor()
+            execute(c, 'SELECT * FROM transactions WHERE substr(signature,1,4)=substr(?1,1,4) and signature like ?1;', (_t + '%', ))
+            raw = c.fetchone()
+            c.close()
+            conn.close()
+            conn = None
+            c = None
+        except:
+            src += '<p align=center>reading failed</p>\n'
+            src += '</div>\n'
+            src += '</div>\n'
+            src += '</div>\n'
+            src += '</div>\n'
+            html_src = web_html_template.WEB_ROOT_TEMPLATE % dict(
+                title='BitDust blockchain explorer',
+                site_url='https://bitdust.io',
+                basepath='https://bitdust.io/',
+                wikipath='https://bitdust.io/wiki/',
+                idserverspath='https://identities.bitdust.io/',
+                blockchainpath='https://blockchain.bitdust.io/',
+                div_main_class='main blockchain-transaction',
+                div_main_body=src,
+                google_analytics='',
+            )
+            return strng.to_bin(html_src)
+
+        src += '<div>block: <b>{}</b></div><br>\n'.format(raw[0])
+        src += '<div>block hash: <b><code>{}</code></b></div><br>\n'.format(raw[7])
+        src += '<div>timestamp: <b>{}</b></div><br>\n'.format(time.strftime('%Y/%m/%d %H:%M:%S', time.gmtime(float(raw[1]))))
+        src += '<div>sender: <b><code>{}</code></b></div><br>\n'.format(raw[2])
+        src += '<div>recipient: <b><code>{}</code></b></div><br>\n'.format(raw[3])
+        src += '<div>amount: <b>{0:g}</b></div><br>\n'.format(raw[4])
+        src += '<div>fee: <b>{0:g}</b></div><br>\n'.format(raw[8])
+        src += '<div>reward: <b>{0:g}</b></div><br>\n'.format(raw[9])
+        src += '<div>operation: <b>{}</b></div><br>\n'.format(raw[10])
+        src += '<div style="margin: 0 auto; overflow-wrap: break-word; word-wrap: break-word;">openfield: <b><code>{}</code></b></div>\n'.format(raw[11])
+        src += '<div style="margin: 0 auto; overflow-wrap: break-word; word-wrap: break-word;">signature:\n<b><code>{}</code></b></div><br>\n'.format(self.tx_id)
+        src += '</div>\n'
+        src += '</div>\n'
+        src += '</div>\n'
+        src += '</div>\n'
+
+        html_src = web_html_template.WEB_ROOT_TEMPLATE % dict(
+            title='BitDust blockchain explorer',
+            site_url='https://bitdust.io',
+            basepath='https://bitdust.io/',
+            wikipath='https://bitdust.io/wiki/',
+            idserverspath='https://identities.bitdust.io/',
+            blockchainpath='https://blockchain.bitdust.io/',
+            div_main_class='main blockchain-transaction',
+            div_main_body=src,
+            google_analytics='',
+        )
+        return strng.to_bin(html_src)
+
+
+#------------------------------------------------------------------------------
+
+
+class BlockchainRootPage(resource.Resource):
+    def getChild(self, path, request):
+        if not path:
+            return self
+        try:
+            path = strng.to_text(path)
+        except:
+            return resource.NoResource('Not found')
+        if path:
+            return BlockchainTransactionPage(path)
+        return resource.NoResource('Not found')
+
+
+#------------------------------------------------------------------------------
+
+
+def main():
+    bismuth_node.init()
+    settings.init()
+    reactor.addSystemEventTrigger('before', 'shutdown', shutdown)  # @UndefinedVariable
+    reactor.callWhenRunning(init)  # @UndefinedVariable
+    reactor.run()  # @UndefinedVariable
+    settings.shutdown()
+
+
+#------------------------------------------------------------------------------
+
+if __name__ == '__main__':
+    main()