117 lines
3.5 KiB
Python
117 lines
3.5 KiB
Python
import RNS
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import time
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import os
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import os.path
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from .vendor import umsgpack as umsgpack
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class Bundle:
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NO_CUSTODY = 0x00;
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TAKING_CUSTODY = 0x01;
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FULL_CUSTODY = 0x02;
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CHUNK_SIZE = RNS.Resource.MAX_EFFICIENT_SIZE / 4
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def __init__(self, destination = None, data = None, filepath = None, advertised_id = None):
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self.destination = destination
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self.state = None
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self.data_file = None
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self.meta_file = None
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self.id = None
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self.storagepath = None
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self.size = None
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self.chunks = 0
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self.heartbeat = time.time()
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self.resources = []
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try:
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if data != None or filepath != None:
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if filepath == None and data != None:
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try:
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self.id = RNS.Identity.fullHash(data)
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self.storagepath = Reticulum.bundlepath+"/"+self.id.hex()
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self.datapath = self.storagepath+"/data"
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self.metadatapath = self.storagepath+"/metadata"
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if not os.path.isdir(self.storagepath):
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os.makedirs(self.storagepath)
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else:
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RNS.log("Warning, bundle already exists in storage location, recreating", RNS.LOG_DEBUG)
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self.data_file = open(self.datapath, "wb")
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self.data_file.write(data)
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self.data_file.close()
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except Exception as e:
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RNS.log("Error while initialising bundle from data, the contained exception was:", RNS.LOG_ERROR)
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RNS.log(str(e))
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self.state = Bundle.FULL_CUSTODY
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elif data == None and filepath != None:
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try:
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input_file = open(filepath, "rb")
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self.id = RNS.Identity.fullHash(input_file.read())
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input_file.seek(0)
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self.storagepath = RNS.Reticulum.bundlepath+"/"+self.id.hex()
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self.datapath = self.storagepath+"/data"
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self.metadatapath = self.storagepath+"/metadata"
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if not os.path.isdir(self.storagepath):
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os.makedirs(self.storagepath)
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else:
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RNS.log("Warning, bundle already exists in storage location, recreating", RNS.LOG_DEBUG)
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self.data_file = open(self.datapath, "wb")
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self.data_file.write(input_file.read())
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self.data_file.close()
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input_file.close()
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except Exception as e:
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RNS.log("Error while reading input file for bundle, the contained exception was:", RNS.LOG_ERROR)
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RNS.log(str(e))
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self.state = Bundle.FULL_CUSTODY
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else:
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raise ValueError("Bundle cannot be created from data and file path at the same time")
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elif advertised_id != None:
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# Incoming bundle transfer
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self.state = Bundle.TAKING_CUSTODY
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else:
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raise ValueError("No source of data specified for bundle initialisation")
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# Prepare file handles and metadata
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self.size = os.stat(self.datapath).st_size
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if self.size < 1:
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raise IOError("Bundle data is empty")
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self.chunks = ((self.size-1)//Bundle.CHUNK_SIZE)+1
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self.data_file = open(self.datapath, "rb")
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self.flush_metadata()
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except Exception as e:
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RNS.log("Error while initialising bundle. The contained exception was:", RNS.LOG_ERROR)
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RNS.log(str(e), RNS.LOG_ERROR)
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raise e
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def flush_metadata(self):
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try:
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metadata = {
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"destination": self.destination,
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"heartbeat": self.heartbeat,
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"size": self.size,
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"chunks": self.chunks,
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"state": self.state}
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self.meta_file = open(self.metadatapath, "wb")
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self.meta_file.write(umsgpack.packb(metadata))
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self.meta_file.close()
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except Exception as e:
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RNS.log("Error while flushing metadata for bundle "+RNS.prettyhexrep(self.id), RNS.LOG_ERROR)
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RNS.log("The contained exception was: "+str(e), RNS.LOG_ERROR)
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class BundleAdvertisement:
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pass |