I need to save a wav file that is HTTP POSTed to a php page.
What does PHP5 do automatically to a POSTed variable when it puts it in
the $_POST[] superglobal array? I haven't been able to find any info on
this....
I have a script that does what I want in PERL, but I need to do it in
PHP.
I think the PERL does something magic when it does this:
#### PERL CODE ####
read ( STDIN, $buffer, $ENV { 'CONTENT_LENGTH ' } );
@pairs = split ( /&/, $buffer );
foreach $pair ( @pairs )
{
($name, $value) = split(/=/, $pair);
$value =~ tr/+/ /;
$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
$FORM { $name } = $value;
}
#### END PERL CODE ####
This is where it separates out the name,value pairs, and for the value,
does the equivalent of urldecode(), base64decode() (am I correct?)
It looks like PHP5 is automatically doing base64decode() and
urldecode(), because when I look at the raw tcpdump of the HTTP
session, I see this:
POST.<obscured>/save_wav.php.HT TP/1.0..
Content-Type:.applicati on/x-www-form-urlencoded..
User-Agent:.BeVocal/2.7.VoiceXML/2.0.BVPlatform/1.8.5.rc1a..
Host:.<obscured >..
Content-Length:.147341. .
Via:.1.1.bvcapx y002:8080.(squi d/2.5.STABLE4)..
X-Forwarded-For:.10.0.121.2 15..
Cache-Control:.max-age=0..
Connection:.kee p-alive..
...
message=RIFF%E4 %C6%00%00WAVEfm t+%10%00%00%00% 01%00%01%00
(90K more of this follows)
But when I look at the data as $_POST['message'], I see this:
RIFFt\0\0WAVEf mt \0\0\0\0\0@ \0\0@ \0\0\0\ 0\0\0dataîs\0\0 ÿ
the + was translated to " " and the %NN was translated back to normal
value.
So, my question is, if PHP5 is doing base64decode and urldecode
automatically, why is my data still coming across corrupt?
Here is how I'm trying to save it:
// PHP CODE
$writepath=<som e path>;
$filename="wavf ile";
$wavdata=$_POST["message"];
$lpn=$_POST["license_plate_ number"];
$callerid=$_POS T["callerid"];
file_put_conten ts("$writepath/$filename-raw.wav", "$wavdata") ;
file_put_conten ts("$writepath/$filename-u.wav", urldecode($wavd ata));
// exactly same as raw file
// END PHP CODE
This writes all the data to a file, and I see the wav header, but the
data doesn't look right when I compare it to the output from the PERL
script (i'm not sure if visually comparing two wav files get me
anything)
Is there another way I should be saving this besides
file_put_conten ts()?
Background info:
I have a voicexml app that sends three things to my php page:
callerid (string)
license_plate_n umber (string)
message (wav data)
I have no problem accessing:
$_POST["callerid"]
$_POST["license_plate_ number"]
My voiceXML app sends the wav data as "audio/wav", and the enctype is
"applicatio n/x-www-form-urlencoded"
I've been searching all over the internet for the past few days and I'm
stuck.
help, please?
Billy Becker
14  4337 
More Info:
a hex dump of the wav file from perl shows lots of 0x00 when there is
silence, but a hex dump from php shows lots of this pattern 5C 30 F8 FF
F8 FF F8 FF F8 FF F8 FF 08 where there should be silence in the file.
any ideas what php is doing (or what I'm making php do?)
--
Billy
I'm not using a file input control. Right now, the data is sent:
Content-Type:.applicati on/x-www-form-urlencoded..
This method works with PERL, and I would like to make it work with PHP.
I can see the data in PHP, but the format is wrong, and I was wondering
what PHP does to POST variables before putting them in the $_POST[]
array. I see that it is urldecoding and base64decoding. .. but it must
be doing something else in addition, because my data is corrupt. As the
snippet of hex data from my previous post shows, PHP is turning
changing 00 into high-bit characters. Is this a bug? or is this
intended functionality that just isn't explained anywhere?
Another question: is there any way to access the raw POST data? if so,
how?
Thanks,
Billy
I'm not using a file input control. Right now, the data is sent:
Content-Type:.applicati on/x-www-form-urlencoded..
This method works with PERL, and I would like to make it work with PHP.
I can see the data in PHP, but the format is wrong, and I was wondering
what PHP does to POST variables before putting them in the $_POST[]
array. I see that it is urldecoding and base64decoding. .. but it must
be doing something else in addition, because my data is corrupt. As the
snippet of hex data from my previous post shows, PHP is turning
changing 00 into high-bit characters. Is this a bug? or is this
intended functionality that just isn't explained anywhere?
Another question: is there any way to access the raw POST data? if so,
how?
Thanks,
Billy
On 2005-05-10, bi**********@gm ail.com <bi**********@g mail.com> wrote: Another question: is there any way to access the raw POST data? if so,
how?
Afaik it's only possible if php doesn't recognize the content-type.
And you should be able to read like $file = file_get_conten ts('php://input');
--
Met vriendelijke groeten,
Tim Van Wassenhove <http://www.timvw.info>
On 2005-05-10, bi**********@gm ail.com <bi**********@g mail.com> wrote: Another question: is there any way to access the raw POST data? if so,
how?
Afaik it's only possible if php doesn't recognize the content-type.
And you should be able to read like $file = file_get_conten ts('php://input');
--
Met vriendelijke groeten,
Tim Van Wassenhove <http://www.timvw.info>
I just discoverd the "always_populat e_raw_post_data = on" directive
that you can add to the php.ini file. With that in place, I am able to
get to the $HTTP_RAW_POST_ DATA string, and see my values. From here, I
just need to parse the string, and then urldecode() and base64decode()
the part I want.
It's a hassle, but atleast I'll get to what I want.
Still would like to know what exactly PHP5 does when it stick variables
in the $_POST[] array...
--
Billy
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