onionr/src/httpapi/miscpublicapi/getblocks.py

"""Onionr - Private P2P Communication.

Public endpoints to get block data and lists
"""
from flask import Response, abort

import config
from onionrutils import bytesconverter, stringvalidators
from coredb import blockmetadb
from utils import reconstructhash
from onionrblocks import BlockList
from .. import apiutils
"""
    This program 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.

    This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
"""


def get_public_block_list(publicAPI, request):
    # Provide a list of our blocks, with a date offset
    dateAdjust = request.args.get('date')
    bList = blockmetadb.get_block_list(dateRec=dateAdjust)
    share_list = ''
    if config.get('general.hide_created_blocks', True):
        for b in publicAPI.hideBlocks:
            if b in bList:
                # Don't share blocks we created if they haven't been *uploaded* yet, makes it harder to find who created a block
                bList.remove(b)
    for b in bList:
        share_list += '%s\n' % (reconstructhash.deconstruct_hash(b),)
    return Response(share_list)


def get_block_data(publicAPI, data):
    """data is the block hash in hex"""
    resp = ''
    if stringvalidators.validate_hash(data):
        if not config.get('general.hide_created_blocks', True) or data not in publicAPI.hideBlocks:
            if data in publicAPI._too_many.get(BlockList).get():
                block = apiutils.GetBlockData().get_block_data(data, raw=True, decrypt=False)
                try:
                    block = block.encode('utf-8') # Encode in case data is binary
                except AttributeError:
                    if len(block) == 0:
                        abort(404)
                block = bytesconverter.str_to_bytes(block)
                resp = block
    if len(resp) == 0:
        abort(404)
        resp = ""
    # Has to be octet stream, otherwise binary data fails hash check
    return Response(resp, mimetype='application/octet-stream')