So far, the answer is that there are some problems with subclassing
NSInputStream that may prevent it from working, so for now our best bet is
probably to use a temporary file.
On 22.06.2005 23:51, "Alexey Proskuryakov" <email@hidden> wrote:
>
> I have used a DTS support incident to ask for sample code doing exactly
> this job; it is currently in progress. It may even result in a public
> technote, otherwise, I will hopefully be able to post some detailed info when
> I get it.
>
> On Wed, 22 Jun 2005 11:11:02 -0700 Becky Willrich <email@hidden> wrote:
>> Hi Tracy -
>>
>> What you need is to define your own kind of stream; the best way to do that
>> is unfortunately at the Foundation layer - you can subclass NSInputStream
>> and implement your own backing store to be the data you want followed by the
>> contents of the file you want.
>>
>> Using only CFNetwork and below, your best bet is to create a temporary file
>> that's a copy of the data to be uploaded, then use plain ol' file system
>> calls to insert the extra bytes you need at the beginning, then create a
>> read stream from the temporary file and pass that to CFNetwork. Once the
>> stream has finished its work, you can delete the temporary file.
>>
>> Hope that helps,
>> REW
>>
>>
>> On Jun 22, 2005, at 11:02 AM, Tracy Stampfli wrote:
>>> I am using CFNetwork to upload files using HTTP POST multipart/form-
>>> data requests. This works fine for small files, but I would like to
>>> be able to upload larger files without having to read the entire
>>> file into memory in order to create the body of the request.
>>>
>>> Currently, since the body of my request has to include both the
>>> file data and the form data (boundary strings, etc.). I create a
>>> buffer, fill it with the form elements and file data, call
>>> CFReadStreamCreateWithBytesNoCopy to get a stream from the buffer,
>>> and then call CFReadStreamCreateForStreamedHTTPRequest to make my
>>> request.
>>>
>>> What I would like to do is get a stream to the file (with
>>> CFReadStreamCreateWithFile, presumably) and create the request from
>>> that stream, without reading the file into memory. The problem is
>>> that if the file stream is used as the body of the request, I can't
>>> include other any data in the body, like the form elements. Is
>>> there any way to stream in the file as part of the body of the
>>> request, but still add other data?
>>>
>>>
>>> -Tracy
- WBR, Alexey Proskuryakov
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