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1.9 KiB
1.9 KiB
P2P-JAVA-PROJECT version 1 (Protocol for step 1)
All messages begins with P2P-JAVA-PROJECT VERSION 1.0\n
(this version of the protocol).
Client messages
LIST\n
: ask the server to list files from server root directoryDOWNLOAD\n<FILENAME>\n
: ask the server to download file from server root directory. Only one filename is allowed per request.
Server responses
- The response to
LIST
request is in the formatLIST\n<FILENAME 1>\n<FILENAME 2>\n[…]<LAST FILENAME>\n\n
- The response to
DOWNLOAD
request isLOAD\n<FILESIZE (BYTES)>\n<POSITION>\n<CONTENT OF FILE>
orNOT FOUND\n
if the file doesn't exists. - The server send a
PROTOCOL ERROR\n
message if it doesn't understands what the client sent. - The server send a
INTERNAL ERROR\n
message if it encounters an internal error.
P2P-JAVA-PROJECT version 1.1 (Binary protocol for step 1)
[0-7: VERSION(0x11, first quartet is major version, second is minor)]
[8-15: REQUEST/RESPONSE CODE]
[16-31: RESERVED FOR FUTURE USE]
[32-63: PAYLOAD SIZE IN BYTES]
[64-xx: PAYLOAD]
Requests and responses codes
-
REQUESTS (msb is 0):
LIST
(0x00)LOAD
(0x01)
-
RESPONSES (msb is 1):
LIST
(0x80)LOAD
(0x81)NOT FOUND
(0x82)PROTOCOL ERROR
(0x83)INTERNAL ERROR
(0x84)
List
Payload size for list request is always zero.
Payload for list response is filenames separated by \n
.
Load
Not found
Response when the file requested is not found on the server. Payload size for Not found is zero.
Protocol error
Response when the request cannot be interpreted. Payload size for Protocol error is zero
Internal error
Response in internal failure case. Payload size for Internal error is zero.
Load response
Payload contains
[64-127: OFFSET OF FILE CONTENT IN BYTES]
[128-159: TOTAL FILESIZE]
[<FILENAME>\n]
[FILE CONTENT]
Load request
Payload contains only the name of the file to load.