JSON, URL-encode, and UTF-8

Charles Warwick charles at techstrategies.com.au
Fri Aug 21 04:07:11 EDT 2015

HI Peter,

I did some testing with Jacque and found that her LC7 was sending the wrong content-type when posting to the PHP script.

In case anyone is interested:

It was using a content type of 'application/json’ which would have made sense if the PHP script was written to accept the json data directly.

However, it was expecting the POST data to be encoded in name/value format: variableA=valueA&variableB=valueB.

In this case, it required the json data stored in a variable called json:  i.e.  json=<json data>

Changing the headers as follows before the POST resolved the issue:

  set the httpHeaders to “content-type: application/x-www-form-urlencoded"

As I mentioned to Jacque, the json data itself needs to be urlEncoded.



> On 21 Aug 2015, at 5:20 pm, Peter W A Wood <peterwawood at gmail.com> wrote:
>> On 21 Aug 2015, at 10:59, Peter W A Wood <peterwawood at gmail.com> wrote:
>> Jacque
>>> On 21 Aug 2015, at 10:13, J. Landman Gay <jacque at hyperactivesw.com <mailto:jacque at hyperactivesw.com>> wrote:
>>> Here's a test. This posts just fine in LC 6.x but fails in 7.0.6 and 7.1rc1.
>>> Make a field with this in it:
>>>  [{"Meals":"Yes","Purpose":"Business"}]
>>> Now put this into a button or card script:
>>> constant kServerURL = "https://www.domain.com/results.php <https://www.domain.com/results.php>"  --### use a valid URL here
>>> command sendToServer
>>> if the version < 7 then
>>>   put fld 1 into tData
>>>   put "json=" before tData
>>> else
>>>   put textEncode(fld 1,"UTF8") into tData
>>>   put textEncode("json=",UTF8) before tData
>>> end if
>>> post tData to kServerURL
>>> put it into tResponse
>>> put the result into tErr
>>> breakpoint -- so you can see it
>>> end sendToServer
>>> If someone can test this against a simple echo PHP maybe it will tell us something. The real server returns empty in LC 7 and "OK" in LC 6.
>> This works fine in LiveCode 7.0.3. I’ll download 7.1RC1 and see if it works there too.
>> Peter
> It also works on LiveCode 7.1 RC1 … which took me hours to download :-(
> Regards
> Peter
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