Summary

• Page properties (2 modified, 0 added, 0 removed)
• Objects (1 modified, 0 added, 0 removed)
  • Confluence.Code.ConfluencePageClass[0]

Details

Page properties

Author

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1		-XWiki.stu115334
	1	+XWiki.stu115775

Content

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	1	+The Communication is handled by a WebProvider, wich is a central server in a star pattern. This server waits for clients and applies theire changes and distributes these changes to all interested clients.
	2	+
	3	+The provided WebProvider listens on port 8089 and is accesed by the Controller which does a protocoll-upgrade to enable full block data-writeing and PHP-instances which provide data for a webside or ServerSendEvents(SSE)
	4	+
	5	+The communication protocoll is a use-case limmited binary protocol which sends a one byte command followed by a one byte datatype followed by a specific number of data bytes specified by the command and datatype.
	6	+
	7	+=== Commands: ===
	8	+
	9	+|=(((
	10	+Byte
	11	+)))|=(((
	12	+Name
	13	+)))|=(((
	14	+Usage
	15	+)))|=(% colspan="1" %)(% colspan="1" %)
	16	+(((
	17	+Data Content
	18	+)))
	19	+|(((
	20	+0x01
	21	+)))|(((
	22	+Set Data
	23	+)))|(((
	24	+sets a part of specified data or all if in blockmode
	25	+)))|(% colspan="1" %)(% colspan="1" %)
	26	+(((
	27	+2 bytes, index and value (or all values and no index if only one index exists or blockmode is on)
	28	+)))
	29	+|(((
	30	+0x02
	31	+)))|(((
	32	+Request Data
	33	+)))|(((
	34	+requests specified data
	35	+)))|(% colspan="1" %)(% colspan="1" %)
	36	+(((
	37	+no data
	38	+)))
	39	+|(((
	40	+0x03
	41	+)))|(((
	42	+Enable Stream
	43	+)))|(((
	44	+request to get updates of specified data
	45	+)))|(% colspan="1" %)(% colspan="1" %)
	46	+(((
	47	+no data
	48	+)))
	49	+|(((
	50	+0x04
	51	+)))|(((
	52	+Disable Stream
	53	+)))|(((
	54	+request to stop geting updates of specified data
	55	+)))|(% colspan="1" %)(% colspan="1" %)
	56	+(((
	57	+no data
	58	+)))
	59	+|(((
	60	+0x05
	61	+)))|(((
	62	+Response Data
	63	+)))|(((
	64	+response of a data request
	65	+)))|(% colspan="1" %)(% colspan="1" %)
	66	+(((
	67	+full dataset of given datatype
	68	+)))
	69	+|(((
	70	+0x06
	71	+)))|(((
	72	+Stream Data
	73	+)))|(((
	74	+an data update notification
	75	+)))|(% colspan="1" %)(% colspan="1" %)
	76	+(((
	77	+full dataset of given datatype
	78	+)))
	79	+|(% colspan="1" %)(% colspan="1" %)
	80	+(((
	81	+0x07
	82	+)))|(% colspan="1" %)(% colspan="1" %)
	83	+(((
	84	+Switch to 'Block' protocoll
	85	+)))|(% colspan="1" %)(% colspan="1" %)
	86	+(((
	87	+switch to blockmode, datatype has to have the same value as validation
	88	+)))|(% colspan="1" %)(% colspan="1" %)
	89	+(((
	90	+no data
	91	+)))
	92	+
	93	+=== Datatypes: ===
	94	+
	95	+|=(((
	96	+Byte
	97	+)))|=(((
	98	+Name
	99	+)))|=(((
	100	+number of bytes
	101	+)))
	102	+|(((
	103	+0x01
	104	+)))|(((
	105	+Position
	106	+)))|(((
	107	+NUM_TRAINS = 11
	108	+)))
	109	+|(((
	110	+0x02
	111	+)))|(((
	112	+Destination
	113	+)))|(((
	114	+NUM_TRAINS = 11
	115	+)))
	116	+|(((
	117	+0x03
	118	+)))|(((
	119	+Cleanup
	120	+)))|(((
	121	+1
	122	+)))
	123	+|(((
	124	+0x04
	125	+)))|(((
	126	+Randommode
	127	+)))|(((
	128	+1
	129	+)))
	130	+|(((
	131	+0x05
	132	+)))|(((
	133	+Lamps
	134	+)))|(((
	135	+NUM_LAMPS = 24
	136	+)))
	137	+|(((
	138	+0x06
	139	+)))|(((
	140	+Schedule(actually Station)
	141	+)))|(((
	142	+NUM_TRAINS = 11
	143	+)))
	144	+|(((
	145	+0x07
	146	+)))|(((
	147	+Substation
	148	+)))|(((
	149	+NUM_TRAINS = 11
	150	+)))
	151	+
	152	+=== Running the WebProvider: ===
	153	+
	154	+go into code/interface
	155	+
	156	+run 'make web'
	157	+
	158	+run './web'
	159	+
	160	+= Ideas for a new version: =
	161	+
	162	+(% style="list-style-type: square;" %)
	163	+* Don't use fixed datatypes, instead add a command to create a datatype by name and bytesize, which returns a datatypenumber, uniqe for each name, disconnects if size doesn't match with existing.
	164	+* Just use a different command to set the full dataset
	165	+* don't send updates to a client if the only change was caused by this client (just skip the current client on setting the dirty flag)
	166	+* Maybe add a minimum time between updates (prevents SSE and others from being flodded and the website actually crashing by a JavaScript DOS)
	167	+
1	1	\\

Confluence.Code.ConfluencePageClass[0]

Id

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1		-32145653
	1	+32145654

URL

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1		-https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/RP2/pages/32145653/Server/ Website Communication
	1	+https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/RP2/pages/32145654/Server/ Website Communication