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 byte followed by a specific number of data bytes specified by the command and datatype.
6		-
7		-=== Commands: ===
8		-
9		-(% class="wrapped" %)
10		-|=(((
11		-Byte
12		-)))|=(((
13		-Name
14		-)))|=(((
15		-Usage
16		-)))|=(% colspan="1" %)(% colspan="1" %)
17		-(((
18		-Data Content
19		-)))
20		-|(((
21		-0x01
22		-)))|(((
23		-Set Data
24		-)))|(((
25		-sets a part of specified data or all if in blockmode
26		-)))|(% colspan="1" %)(% colspan="1" %)
27		-(((
28		-2 bytes, index and value (or all values and no index if only one index exists or blockmode is on)
29		-)))
30		-|(((
31		-0x02
32		-)))|(((
33		-Request Data
34		-)))|(((
35		-requests specified data
36		-)))|(% colspan="1" %)(% colspan="1" %)
37		-(((
38		-no data
39		-)))
40		-|(((
41		-0x03
42		-)))|(((
43		-Enable Stream
44		-)))|(((
45		-request to get updates of specified data
46		-)))|(% colspan="1" %)(% colspan="1" %)
47		-(((
48		-no data
49		-)))
50		-|(((
51		-0x04
52		-)))|(((
53		-Disable Stream
54		-)))|(((
55		-request to stop geting updates of specified data
56		-)))|(% colspan="1" %)(% colspan="1" %)
57		-(((
58		-no data
59		-)))
60		-|(((
61		-0x05
62		-)))|(((
63		-Response Data
64		-)))|(((
65		-response of a data request
66		-)))|(% colspan="1" %)(% colspan="1" %)
67		-(((
68		-full dataset of given datatype
69		-)))
70		-|(((
71		-0x06
72		-)))|(((
73		-Stream Data
74		-)))|(((
75		-an data update notification
76		-)))|(% colspan="1" %)(% colspan="1" %)
77		-(((
78		-full dataset of given datatype
79		-)))
80		-|(% colspan="1" %)(% colspan="1" %)
81		-(((
82		-0x07
83		-)))|(% colspan="1" %)(% colspan="1" %)
84		-(((
85		-Switch to 'Block' protocoll
86		-)))|(% colspan="1" %)(% colspan="1" %)
87		-(((
88		-switch to blockmode, datatype has to have the same value as validation
89		-)))|(% colspan="1" %)(% colspan="1" %)
90		-(((
91		-no data
92		-)))
93		-
94		-=== Datatypes: ===
95		-
96		-(% class="wrapped" %)
97		-|=(((
98		-Byte
99		-)))|=(((
100		-Name
101		-)))|=(((
102		-number of bytes
103		-)))
104		-|(((
105		-0x01
106		-)))|(((
107		-Position
108		-)))|(((
109		-NUM_TRAINS = 11
110		-)))
111		-|(((
112		-0x02
113		-)))|(((
114		-Destination
115		-)))|(((
116		-NUM_TRAINS = 11
117		-)))
118		-|(((
119		-0x03
120		-)))|(((
121		-Cleanup
122		-)))|(((
123		-1
124		-)))
125		-|(((
126		-0x04
127		-)))|(((
128		-Randommode
129		-)))|(((
130		-1
131		-)))
132		-|(((
133		-0x05
134		-)))|(((
135		-Lamps
136		-)))|(((
137		-NUM_LAMPS = 24
138		-)))
139		-|(((
140		-0x06
141		-)))|(((
142		-Schedule(actually Station)
143		-)))|(((
144		-NUM_TRAINS = 11
145		-)))
146		-|(((
147		-0x07
148		-)))|(((
149		-Substation
150		-)))|(((
151		-NUM_TRAINS = 11
152		-)))
153		-
154		-=== Running the WebProvider: ===
155		-
156		-go into code/interface
157		-
158		-run 'make web'
159		-
160		-run './web'
161		-
162		-= Ideas for a new version: =
163		-
164		-(% style="list-style-type: square;" %)
165		-* 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.
166		-* Just use a different command to set the full dataset
167		-* 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)
168		-* Maybe add a minimum time between updates (prevents SSE and others from being flodded and the website actually crashing by a JavaScript DOS)
169		-
170	170	\\

Confluence.Code.ConfluencePageClass[0]

Id

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1		-32145656
	1	+32145653

URL

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1		-https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/RP2/pages/32145656/Server/ Website Communication
	1	+https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/RP2/pages/32145653/Server/ Website Communication