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In my
understanding you should add a Cache-Contol http header to the push
message header.
According to "WAP-230-WSP"
01 Transaction ID (Push
ID)
06 PDU Type (Push
PDU)
18 Header Length (24
bytes)
AE Content
Type=application/vnd.wap.sic (0x80 | 0x2E)
88 Cache-Control= (encoding v.1.1 table
39)
81 Next is 1-octet Integer Value >
127
80 No-Cache (octet 128) (chap.
8.4.2.15)
96 Host (0x80 | 0x16), WAP -
230, Appendix A, table 39 (wsp)
6C 6F 63 61 6C 68 6F 73 74 3A 38
30 38 30
localhost:8080
00
8D Content-Length
(wsp, table 39)
DD 221
bytes
B4 Push-Flag (wsp, table
39)
80 no flags set (wsp, chapter 8.4.2.59
& chapter 8.4.2.1; SPEC-PushOTA-19991108)
....
As an
alternative, could be easier to control the phone cache by the WML
deck you send with the Service Indication.
If you
want to be sure the page is newly loaded every time it is displayed, you should
use the meta tags
<meta http-equiv="Cache-control"
content="no-cache" forua="true"/>
in the <head>
section of the WML deck file.
In this case, you
would take into account the different behavior of the micro browser in the
mobile phone in respect of the cache management.
I send this reply to the list just to have comments
about it.
Bye, Claudio.
Hi, I saw a post you had shown
below.
I am interested in what would have to be
added to the message described below to set NO-CACHE in the HTTP header.
I looked in the document "WAP-230-WSP-20010705-a.pdf Page 86" but I was unable
to determining how to fill in the CACHE fields. Basically the problem I am
running into is when a phone gets my WAP push it will execute the link I send
the first time. If the user trys to execute that link again it uses it's local
cache instead of requesting from the server again.
Here is an example of what I am trying to
encode:
0x00,
// Transaction ID (Push ID)
0x06,
// PDU Type (Push PDU) Apndx A Table
34
0x01,
// Header Length (not sure why this is
one)
(byte)0xAE, // Content Type=application/vnd.wap.sic
(0x80 | 0x2E)
0x02,
// <Version number - WBXML version
1.2>
0x05,
// <SI 1.0 Public Identifier>
0x6A,
// <Charset=UTF-8 (MIBEnum 106)> WAP-230 table
42
0x00,
// <String table length>
0x45,
// <SI element start, with content 0x05 |
0x40>
(byte)0xC6, // <indication element start, with content and
attributes 0x06 | 0x40>
0x0C,
// (0C http://)
0x03
// next is an ASCII string 0x00 terminated
~~~~~~~~~
<URL LINK>
<String Description of URL>
I appreciate any enlightenment you can send my
way.
-- Chris
--------------------------------------------------------------------
Claudio Montanari
TAI S.r.l.
Viale Gramsci
12 - 56125 - Pisa
Via Pazzagli 2 - 50141 - Firenze
Tel: +39 050
503222
Fax. +39 050 24421
E-mail:
c.montanari@tai.it
http://www.tai.it
00 Default
SMSC
51 UDHI and SUBMIT
00 MR
0C Destination number length (12
digits)
91 Destination number format (international)
xxxxxxxxxxxx
Destination number (xxxxxxxxxxxx)
00 Protocol ID
04 Data Coding Schema
(DCS 8-bit encoded)
A7 Validity Period (24 h)
7C User Data Length (124
bytes)
06 User Data Header Length (6 bytes)
05 UDH Item Element id (Port
Numbers)
04 UDH IE length (4 bytes)
0B84 destination port number
23F0
origin port number
01 Transaction ID (Push ID)
06 PDU Type (Push
PDU)
15 Header Length (21 bytes)
AE Content Type=application/vnd.wap.sic
(0x80 | 0x2E)
96 Host, WAP - 230, Appendix A, table 39 (wsp)
6C 6F 63 61
6C 68 6F 73 74 3A 38 30 38 30 localhost:8080
00 End of the text string
(wsp, chapter 8.4.2.29 & chapter
8.4.2.1)
8D Content-Length (wsp,
table 39)
DD in hex, 221 bytes (wsp, chapter 8.4.2.20 &
chapter
8.4.2.1)
B4 Push-Flag (wsp, table 39)
80 no flags set (wsp,
chapter 8.4.2.59 & chapter
8.4.2.1; SPEC-PushOTA-19991108.
chapter
9.1.3)
02 <Version number - WBXML version 1.2>
05 <SI 1.0
Public Identifier>
6A <Charset=UTF-8 (MIBEnum 106)>
00
<String table length>
45 <SI element start, with content 0x05 |
0x40>
C6 <indication element start, with content and attributes 0x06
| 0x40
| 0x80>
0C http://
03 (next is an ASCII string 00
terminated)
77 61 70 2E 74 61 69 2E 69 74 wap.tai.it
00
11
<si-id=>
03 (next is an ASCII string 00 terminated)
39 32 40 74 61
69 2E 69 74 92@tai.it
00
08
<action="">0A <created=>
C3 <OPAQUE data
follows>
07 <Length field (7 bytes)>
19990625152315 1999-06-25
15:23:15
10 <si-expires=>
C3 <OPAQUE data follows>
04
<Length field (4 bytes), final 0s are omitted>
20030630 2003-06-30
00:00:00
01 <indication element attributes end>
03 (next is an
ASCII string 00 terminated, the SI content)
56 75 6F 69 20 76 65 64 65 72
65 20 6C 65 20 4D 61 70 70 65 3F Vuoi
vedere le Mappe?
20 4F 70 7A 69 6F
6E 69 20 2D 20 53 63 61 72 69 63 61 Opzioni -
Scarica
00
01
<indication element end>
01 <SI element
end>
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