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.stu115775
	1	+XWiki.stu115334

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		-
168	168	\\

Confluence.Code.ConfluencePageClass[0]

Id

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1		-32145654
	1	+32145653

URL

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