-
Notifications
You must be signed in to change notification settings - Fork 0
/
client1.py
281 lines (267 loc) · 12.6 KB
/
client1.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
import socket
import os
import json
import re
import hashlib
import time
import stat
def parse(string):
return string.split()
def md5(fname):
hash = hashlib.md5()
with open(fname, "rb") as f:
for chunk in iter(lambda: f.read(4096), b""):
hash.update(chunk)
return hash.hexdigest()
def longlist(socket):
msg = ['index_longlist']
msg = json.dumps(msg, separators=(',',':')) # serializing the message that is to be sent to server
socket.send(msg)
data = socket.recv(40096)
data = json.loads(data) # deserializing json data
return data
def shortlist(socket,start,end):
msg = ['index_shortlist',start,end] # start > end
msg = json.dumps(msg, separators=(',',':'))
socket.send(msg)
data = socket.recv(40096)
data = json.loads(data) # deserializing json data
return data
def hashverify(socket,fname):
msg = ['hash_verify',fname]
msg = json.dumps(msg, separators=(',',':'))
socket.send(msg)
data = socket.recv(40096)
data = json.loads(data) # deserializing json data
return data
def TCPreq(socket,key_word,directory,display_flag):
msg = ['download_TCP']
for i in range(2,len(key_word)):
msg.append(key_word[i])
if display_flag == 1:
print
msg = json.dumps(msg, separators=(',',':'))
socket.send(msg) # send message to parent socket but receive from file socket
for i in range(2,len(key_word)):
if display_flag == 1:
print "Attempting to download",key_word[i]
print "....."
size = int(socket.recv(1024))
socket.send('R')
if size == -1:
print "The File",key_word[i],"was not found in the other directory"
print
else:
path = directory + '/' + key_word[i]
f = open(path ,'wb+') # creates a new file if not there
if size > 0:
size_read = 0
while True:
content = socket.recv(1024)
f.write(content)
size_read = size_read + len(content)
if (not content) or (size_read >= size):
break
socket.send('O')
perm = socket.recv(1024)
perm = int(perm)
os.chmod(path,perm)
socket.send('O')
f.close()
if display_flag == 1:
print "Download Complete"
print
data = socket.recv(40096) #for displaying the file's data
data = json.loads(data) # deserializing json data
return data
# def sync_dir(socket,serv_dir):
# for root, dirs, files in os.walk(serv_dir):
# break
# for f in files:
# temp = serv_dir + "/" + f
# if os.path.exists(temp) == False:
# waste = TCPreq(socket,['download','TCP',f['Name']],directory,0)
# else: # file exists but now we have to check for modification
# current_checksum = md5(temp)
# TCPreq(socket,['download','TCP',f['Name']],directory,0)
def sync(socket,directory):
files = longlist(socket)
serv_dir = '/home/bhargava/Academics/2-2/Assignments/Computer Networks/Assignment1/shared2'
for f in files:
temp = directory + "/" + f['Name']
if str(f['Type']) == 'File':
if os.path.exists(temp) == False:
waste = TCPreq(socket,['download','TCP',f['Name']],directory,0)
else: # file exists but now we have to check for modification
current_checksum = md5(temp)
obj = hashverify(socket,f['Name'])
verify_checksum = obj[0]['Checksum']
if str(current_checksum) != str(verify_checksum):
TCPreq(socket,['download','TCP',f['Name']],directory,0)
# else:
# path = serv_dir + f
# sync_dir(socket,path)
print "Synced"
def Main():
host = '127.0.0.1' # IP address of server 1
directory = '/home/bhargava/Academics/2-2/Assignments/Computer Networks/Assignment1/shared1' # shared directory in server 1
port = 5002 # port num of this process
s = socket.socket()
s.connect((host,port))
command = raw_input("-> ")
key_word = parse(command)
while key_word[0] != 'q':
if key_word[0] == 'index':
if key_word[1] == 'longlist':
data = longlist(s)
print "Received the following data from Server"
print
column_width = 25
print "\t"+str('NAME').ljust(column_width),str('SIZE').ljust(column_width),str('SECONDS').ljust(column_width),str('TIMESTAMP').ljust(column_width),str('TYPE').ljust(column_width)
print
for d in data:
print "\t"+str(d['Name']).ljust(column_width),str(d['Size']).ljust(column_width),str(d['Seconds']).ljust(column_width),str(d['Timestamp']).ljust(column_width),str(d['Type']).ljust(column_width)
print
elif key_word[1] == 'regex':
msg = ['index_regex',key_word[2]]
msg = json.dumps(msg, separators=(',',':'))
s.send(msg)
data = s.recv(40096)
data = json.loads(data) # deserializing json data
print "Received the following data from Server"
print
column_width = 25
print "\t"+str('NAME').ljust(column_width),str('SIZE').ljust(column_width),str('SECONDS').ljust(column_width),str('TIMESTAMP').ljust(column_width),str('TYPE').ljust(column_width)
print
for d in data:
print "\t"+str(d['Name']).ljust(column_width),str(d['Size']).ljust(column_width),str(d['Seconds']).ljust(column_width),str(d['Timestamp']).ljust(column_width),str(d['Type']).ljust(column_width)
print
elif key_word[1] == 'shortlist':
data = shortlist(s,key_word[2],key_word[3])
print "Received the following data from Server"
print
column_width = 25
print "\t"+str('NAME').ljust(column_width),str('SIZE').ljust(column_width),str('SECONDS').ljust(column_width),str('TIMESTAMP').ljust(column_width),str('TYPE').ljust(column_width)
print
for d in data:
print "\t"+str(d['Name']).ljust(column_width),str(d['Size']).ljust(column_width),str(d['Seconds']).ljust(column_width),str(d['Timestamp']).ljust(column_width),str(d['Type']).ljust(column_width)
print
else:
print
print "Unknown Flags under index command: Please use longlist, shortlist or regex as one of the flags"
print
elif key_word[0] == 'hash':
if key_word[1] == 'verify':
data = hashverify(s,key_word[2])
print "Received the following data from Server"
print
if int(data[0]['Error']) == 1:
print data[0]['Data']
print
else:
column_width = 40
print "\t"+str('CHECKSUM').ljust(column_width),str('TIMESTAMP').ljust(column_width)
print
for d in data:
print "\t"+str(d['Checksum']).ljust(column_width),str(d['Timestamp']).ljust(column_width)
print
elif key_word[1] == 'checkall':
msg = ['hash_checkall']
msg = json.dumps(msg, separators=(',',':'))
s.send(msg)
data = s.recv(1024)
data = json.loads(data) # deserializing json data
print "Received the following data from Server"
print
column_width = 40
print "\t"+str('NAME').ljust(column_width),str('CHECKSUM').ljust(column_width),str('TIMESTAMP').ljust(column_width)
print
for d in data:
print "\t"+str(d['Name']).ljust(column_width),str(d['Checksum']).ljust(column_width),str(d['Timestamp']).ljust(column_width)
print
else:
print
print "Unknown Flags under hash command: Please use verify or checkall as one of the flags"
print
elif key_word[0] == 'download':
if key_word[1] == 'TCP':
data = TCPreq(s,key_word,directory,1)
print "Received the following data from Server"
print
column_width = 30
print "\t"+str('NAME').ljust(column_width),str('SIZE').ljust(column_width),str('TIMESTAMP').ljust(column_width),str('HASH').ljust(column_width)
print
for d in data:
print "\t"+str(d['Name']).ljust(column_width),str(d['Size']).ljust(column_width),str(d['Timestamp']).ljust(column_width),str(d['Hash']).ljust(column_width)
print
elif key_word[1] == 'UDP':
transferport = 5136 # UDP transfer socket
transfersock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
transfersock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) # for reusing the same hostname
transfersock.bind((host, transferport))
msg = ['download_UDP']
for i in range(2,len(key_word)):
msg.append(key_word[i])
print
msg = json.dumps(msg, separators=(',',':'))
s.send(msg) # send message to parent socket but receive from file socket
for i in range(2,len(key_word)):
print "Attempting to download",key_word[i]
print "....."
size,addr = transfersock.recvfrom(1024)
size = int(size)
transfersock.sendto('R',addr)
if size == -1:
print "The File",key_word[i],"was not found in the other directory"
print
else:
path = directory + '/' + key_word[i]
f = open(path ,'wb+') # creates a new file if not there
if size > 0:
size_read = 0
while True:
content,addr = transfersock.recvfrom(1024)
f.write(content)
size_read = size_read + len(content)
if (not content) or (size_read >= size):
break
f.close()
transfersock.sendto('O',addr)
perm,addr = transfersock.recvfrom(1024)
perm = int(perm)
transfersock.sendto('O',addr)
os.chmod(path,perm)
print "Download Complete"
print
data = s.recv(40096) #for displaying the file's data
data = json.loads(data) # deserializing json data
print "Received the following data from Server"
print
column_width = 35
print "\t"+str('NAME').ljust(15),str('SIZE').ljust(10),str('TIMESTAMP').ljust(25),str('ORIGINAL HASH').ljust(column_width),str('HASH AFTER TRANSFER').ljust(column_width)
print
for d in data:
temp = directory + '/' + str(d['Name'])
checksum = md5(temp)
# hashlib.md5(open(temp,'rb').read()).hexdigest()
print "\t"+str(d['Name']).ljust(15),str(d['Size']).ljust(10),str(d['Timestamp']).ljust(25),str(d['Hash']).ljust(column_width),str(checksum).ljust(column_width)
if str(checksum) == str(d['Hash']):
print "\tSuccessfully Received The File",d['Name'],"without contents changed"
else:
print "\tEncountered and Error in receiving Please download again as the contents may have changed"
print
print
else:
print
print "Unknown Flags under download command: Please use TCP or UDP as one of the flags"
print
else:
print
print "Unidentified Command: Please use commands starting with index or hash or download"
print
sync(s,directory)
command = raw_input("-> ")
key_word = parse(command)
s.close()
if __name__ == '__main__':
Main()