def write(self):
"""write data to cache
layout: horizontal, every sublist will be placed in one row
"""
if self.datass == None:
log.critical("datass is None")
return
fout = open(self.cacheout, "w") #write the data to result file
if self.headers != None:
line = ""
for header in self.headers:
line += "|" + header
line.strip()
line = "#headers: " + line+"\n"
fout.write(line)
#line = "#command: " + case.cmd + "\n"
#fout.write(line)
#assert self.datass != None, "self.datass == None"
assert isinstance(self.datass, list), "self.datass is not a list, %s" %(self.datass)
#assert isinstance(self.datass[0], list), "self.datass[0] is not a list, %s" %(self.datass[0])
for li in self.datass:
for val in li:
fout.write("%s\t" %(val))
fout.write("\n")
fout.flush()
fout.close()
log.info("$ " + self.Id+" cache writing")
def write(self):
"""write data to cache
layout: horizontal, every sublist will be placed in one row
"""
if self.datass == None:
log.critical("datass is None")
return
fout = open(self.cacheout, "w") #write the data to result file
if self.headers != None:
line = ""
for header in self.headers:
line += "|" + header
line.strip()
line = "#headers: " + line+"\n"
fout.write(line)
#line = "#command: " + case.cmd + "\n"
#fout.write(line)
#assert self.datass != None, "self.datass == None"
assert isinstance(self.datass, list), "self.datass is not a list, %s" %(self.datass)
#assert isinstance(self.datass[0], list), "self.datass[0] is not a list, %s" %(self.datass[0])
for li in self.datass:
for val in li:
fout.write("%s\t" %(val))
fout.write("\n")
fout.flush()
fout.close()
log.info("$ " + self.Id+" cache writing")
def in_order_content(self, upcallInfo):
"""the best scenario, content is received in-order, however, we should check those buffered out-of-order chunks
"""
name = str(upcallInfo.Interest.name)
chunkinfo = self.mydata.unsatisfied_chunks_keyed_by_name.pop(name)
if not self.fout.closed:
self.fout.write(chunkinfo.content)
else:
log.critical("fails to write content")
self.mydata.accept_bytes += chunkinfo.data_size
if not self.cache_data:
chunkinfo.content = None
chunkinfo.status = 2 #satisfied yet
self.mydata.satisfied_chunkN += 1
self.mydata.expected_chunkI += 1
self.window.update_receiving(chunkinfo)
log.debug("received in-order Data: %s, out packet: %s" %(name, self.window.packet_on_the_fly))
#check the out-of-order contents recevied before
for name in self.mydata.unsatisfied_chunks_keyed_by_name.keys():
chunkinfo = self.mydata.unsatisfied_chunks_keyed_by_name[name]
if chunkinfo.endT == None:
break
else:
chunkinfo = self.mydata.unsatisfied_chunks_keyed_by_name.pop(name)
if not self.fout.closed:
self.fout.write(chunkinfo.content)
else:
log.critical("fails to write content")
self.mydata.accept_bytes += chunkinfo.data_size
if not self.cache_data:
chunkinfo.content = None
self.mydata.expected_chunkI += 1
chunkinfo.status = 2 #satisfied yet
if self.mydata.final_byte == self.mydata.accept_bytes:
self.is_all = True
for chunkinfo in self.mydata.unsatisfied_chunks_keyed_by_name.itervalues():
log.warn(str(chunkinfo))
log.warn("------------------------ %s all the contents are received---------------------------" %(self.Id))
self.stop()
def __init__(self, name, path, is_dir=True):
"""
"""
Controller.__init__(self)
if not name.startswith("ndnx:") and not name.startswith("/"):
name = "/" + name
self.ndn_name = pyndn.Name(name)
self.path = path
if not os.path.exists(self.path):
log.critical("path %s does not exist" %(self.path))
exit(0)
if is_dir and (not os.path.isdir(self.path)):
log.critical("path %s is not a directory" %(self.path))
exit(0)
if (not is_dir) and (not os.path.isfile(self.path)):
log.critical("path %s is not a file" %(self.path))
exit(0)
self.handle = pyndn.NDN()
self.is_dir = is_dir
self.readers = {} #keyed by ndn_name
def do_receive_content(self, kind, upcallInfo):
"""receive a contents, there are 4 different scenarios: duplicated content, in-order content, out-of-order content, illegal content
"""
name = str(upcallInfo.Interest.name)
if not name in self.mydata.unsatisfied_chunks_keyed_by_name:
log.debug(self.mydata.unsatisfied_chunks_keyed_by_name.keys())
#the chunkinfo is already satisfied by previous chunk (retransmission here)
self.duplicate_content(upcallInfo)
return
chunkinfo = self.mydata.unsatisfied_chunks_keyed_by_name[name]
chunkinfo.endT = datetime.datetime.now()
chunkinfo.data_size = len(upcallInfo.ContentObject.content)
chunkinfo.chunk_size = len(_pyndn.dump_charbuf(upcallInfo.ContentObject.ndn_data))
chunkinfo.content = upcallInfo.ContentObject.content
temp = math.ceil((chunkinfo.chunk_size)/float(self.packet_max_data_size))
self.rtoEstimator.update(chunkinfo)
fbi = upcallInfo.ContentObject.signedInfo.finalBlockID
if fbi != None:
if isinstance(fbi, str):
fbi = pyndn.Name.seg2num(fbi)
#log.info("***************final chunk id: %s" %(fbi))
if self.mydata.final_byte == None: #the first final block content
self.mydata.final_byte = int(fbi)
else:
assert self.mydata.final_byte == int(fbi), "get different final block id, old %s and new %s" %(self.mydata.final_byte, int(fbi))
si = upcallInfo.ContentObject.signedInfo
if si.type == pyndn.CONTENT_NACK:
self.nack_content(upcallInfo)
elif si.type == pyndn.CONTENT_DATA:
if chunkinfo.packetN != temp:
if self.mydata.final_byte != None and chunkinfo.end_byte > self.mydata.final_byte:#final chunk or illegal chunk
log.debug("final chunk, thus size is shorter than expected")
else:
log.debug("expected packetN (%s) != real packetN (%s), final_byte (%s), upcallInfo: %s, chunksize:%s" %(chunkinfo.packetN, temp, self.mydata.final_byte, name, chunkinfo.chunk_size))
#chunkinfo.packetN = temp
self.chunkSizeEstimator.update_receiving(chunkinfo)
# if self.mydata.final_byte!=None and chunkinfo.end_byte < self.mydata.final_byte:
# assert chunkinfo.data_size > 500, "chukinfo is strange, %s" %(chunkinfo)
#
if name == self.mydata.unsatisfied_chunks_keyed_by_name.keys()[0]:
self.in_order_content(upcallInfo)
else:
self.out_of_order_content(upcallInfo)
retxQ = []
for chunkinfo in self.mydata.unsatisfied_chunks_keyed_by_name.itervalues():
if chunkinfo.status == 0:#waiting for re-expressing
retxQ.append(chunkinfo)
if len(retxQ) == 2:
break
#here we do not check whether the request is legal or not
for i in [0, 1]:#mulply add
if self.window.packet_on_the_fly < self.window.get_cwnd():
#re-expressing is prior to request new
if len(retxQ) != 0:
chunkinfo = retxQ.pop(0)
chunkinfo.status = 1
self.re_express_interest(chunkinfo)
continue
if self.mydata.final_byte== None:
self.first_express_interest()
elif self.mydata.final_byte!= None and self.mydata.next_byte < self.mydata.final_byte:
self.first_express_interest()
else:
log.critical("unkown Data type: %s" %(upcallInfo.ContentObject))
def prepare(self, upcallInfo):
ist = upcallInfo.Interest
ist_name = ist.name
flag_index = None #len(ist_name) - 2 #index of the end component
for i in range(len(ist_name)-2):
sub = ist_name[i]
if sub == ADAPTIVE_MOD_FLAG:
flag_index = i
break
if flag_index == None:
log.error("not a flow consumer's interest, ignore: %s" %(ist_name))
return None
expected_data_size = int(ist_name[flag_index+1])
begin_byte = int(ist_name[flag_index+2])
name = ist_name[:flag_index] #not include the flag
name_str = str(name)
if name_str in self.readers:
reader = self.readers[name_str]
log.debug("%s in reader" %(name_str))
else:
if self.is_dir:
subpath = ist_name[upcallInfo.matchedComps:flag_index]
fpath = self.path
for i in range(upcallInfo.matchedComps, flag_index):
temp = ist_name[i]
fpath = os.path.join(fpath, temp)
#assume that matchedComps is the number of matched components, not index
if not os.path.exists(fpath):
log.critical("path %s from Interest %s does not exist" %(fpath, ist_name))
return None
if os.path.isdir(fpath):
log.critical("path %s from Interest %s is not a file" %(fpath, ist_name))
return None
else:#not serve all the directory
if upcallInfo.matchedComps != flag_index:
log.critical("umatched ndn_name: %s, %s"%(ist_name, self.ndn_name))
return None
else:
fpath = self.path
reader = Reader(fpath=fpath)
self.readers[name_str] = reader
log.debug("add a new reader: %s" %(name_str))
data = reader.read(begin_byte, expected_data_size)
if data == None:
log.critical("Interest %s: begin_byte %s > file_size %s" %(ist_name, begin_byte, reader.fsize))
nack = self._nack_template(ist_name, reader)
return nack
else:
log.info("Interest: %s, expected_data_size: %s, begin_byte: %s, data_size: %s" \
%(ist.name, expected_data_size, begin_byte, len(data)))
co = self._data_template(ist_name, data, reader.fsize, pyndn.CONTENT_DATA)
return co
