mirror of
https://github.com/vdemydiuk/mtapi.git
synced 2026-07-28 11:07:48 +00:00
87 lines
3.7 KiB
Plaintext
87 lines
3.7 KiB
Plaintext
|
==========================================================================
|
||
|
|
Unicode & Matlab
|
||
|
|
==========================================================================
|
||
|
|
native2unicode - works with uint8, fails with char
|
||
|
|
|
||
|
|
Taking a unicode character and encoding as bytes:
|
||
|
|
unicode2native(char(1002),'UTF-8')
|
||
|
|
back to the character:
|
||
|
|
native2unicode(uint8([207 170]),'UTF-8')
|
||
|
|
this doesn't work:
|
||
|
|
native2unicode(char([207 170]),'UTF-8')
|
||
|
|
in documentation: If BYTES is a CHAR vector, it is returned unchanged.
|
||
|
|
|
||
|
|
Java - only supports int8
|
||
|
|
Matlab to Java -> uint8 or int8 to bytes
|
||
|
|
Java to Matlab -> bytes to int8
|
||
|
|
char - 16 bit
|
||
|
|
|
||
|
|
Maintenance of underlying bytes:
|
||
|
|
typecast(java.lang.String(uint8(250)).getBytes,'uint8') = 250
|
||
|
|
see documentation: Handling Data Returned from a Java Method
|
||
|
|
|
||
|
|
Command Window difficulty
|
||
|
|
--------------------------------------------------------------------
|
||
|
|
The typical font in the Matlab command window will often fail to render
|
||
|
|
unicode properly. I often can see unicode better in the variable editor
|
||
|
|
although this may be fixed if you change your font preferences ...
|
||
|
|
Copying unicode from the command window often results in the
|
||
|
|
generations of the value 26 (aka substitute)
|
||
|
|
|
||
|
|
More documentation on input/output to urlread2 to follow eventually ...
|
||
|
|
|
||
|
|
small notes to self:
|
||
|
|
for output
|
||
|
|
native2unicode(uint8(output),encoding)
|
||
|
|
|
||
|
|
==========================================================================
|
||
|
|
HTTP Headers
|
||
|
|
==========================================================================
|
||
|
|
Handling of repeated http readers is a bit of a tricky situation. Most
|
||
|
|
headers are not repeated although sometimes http clients will assume this
|
||
|
|
for too many headers which can result in a problem if you want to see
|
||
|
|
duplicated headers. I've passed the problem onto the user who can decide
|
||
|
|
to handle it how they wish instead of providing the right solution, which
|
||
|
|
after some brief searching, I am not sure exists.
|
||
|
|
|
||
|
|
==========================================================================
|
||
|
|
PROBLEMS
|
||
|
|
==========================================================================
|
||
|
|
1) Page requires following a redirect:
|
||
|
|
%-------------------------------------------
|
||
|
|
ref: http://www.mathworks.com/matlabcentral/newsreader/view_thread/302571
|
||
|
|
fix: FOLLOW_REDIRECTS is enabled by default, you're fine.
|
||
|
|
|
||
|
|
2) Basic authentication required:
|
||
|
|
%------------------------------------------
|
||
|
|
Create and pass in the following header:
|
||
|
|
user = 'test';
|
||
|
|
password = 'test';
|
||
|
|
encoder = sun.misc.BASE64Encoder();
|
||
|
|
str = java.lang.String([user ':' password]) %NOTE: format may be
|
||
|
|
%different for your server
|
||
|
|
header = http_createHeader('Authorization',char(encoder.encode(str.getBytes())))
|
||
|
|
NOTE: Ideally you would make this a function
|
||
|
|
|
||
|
|
3) The text returned doesn't make sense.
|
||
|
|
%-----------------------------------------
|
||
|
|
The text may not be encoded correctly. Requires native2unicode function.
|
||
|
|
See Unicode & Matlab section above.
|
||
|
|
|
||
|
|
4) I get a different result in my web browser than I do in Matlab
|
||
|
|
%-----------------------------------------
|
||
|
|
This is generally seen for two reasons.
|
||
|
|
1 - The easiest and silly reason is user agent filtering.
|
||
|
|
When you make a request you identify yourself
|
||
|
|
as being a particular "broswer" or "user agent". Setting a header
|
||
|
|
with the user agent of the browser may fix the problem.
|
||
|
|
See: http://en.wikipedia.org/wiki/User_agent
|
||
|
|
See: http://whatsmyuseragent.com
|
||
|
|
value = ''
|
||
|
|
header = http_createHeader('User-Agent',value);
|
||
|
|
2 - You are not processing cookies and the server is not sending
|
||
|
|
you information because you haven't sent it cookies (everyone likes em!)
|
||
|
|
I've implemented cookie support but it requires some extra files that
|
||
|
|
I need to clean up. Feel free to email me if you'd really like to have them.
|
||
|
|
|