Re: POST Request with non-null-terminated string

From: Henrik Holst via curl-library <curl-library_at_cool.haxx.se>
Date: Mon, 26 Apr 2021 19:18:19 +0200

HI,

  libcurl handles the data you point to with CURLOPT_POSTFIELDS as raw byte
data, or rather "ibcurl will not convert or encode it for you in any way"
as the doc says. Could be that your webserver requires a different
Content-Type header to receive it correctly.

If you use http then I would fire up a network sniffer if I where you to
first make sure that what it sent on the wire is the hexbytes that I expect
them to be, if they are not then you should check your code for problems,
if they do match then it's time to check the server.

/HH

Den mån 26 apr. 2021 kl 18:52 skrev Milen Nikolov via curl-library <
curl-library_at_cool.haxx.se>:

> Hi,
>
> thanks for the answer, I got a few more suggesting the same option. I
> tried it today and it worked fine. I have a follow up question though. In
> the string I'm sending there are extended ASCII characters. I'm currently
> sending them to a test server and what I'm getting back is incorrect.
> However since I haven't set up the server it's hard for me to know if the
> problem is with curl or with the way the server is set up, so I wanted to
> know if the extended ASCII chars in the POST field are getting sent
> correctly. I tried searching but I only found suggestions to URL encode
> them, which in my case is impossible, since the server is supposed to read
> the HEX value of the symbol using the Latin 1 encoding.
>
> Best Regards,
> Milen
>
> > On 23/04/2021 17:17 Daniel Stenberg <daniel_at_haxx.se> wrote:
> >
> >
> > On Fri, 23 Apr 2021, Milen Nikolov via curl-library wrote:
> >
> > > I'm using libcurl in C++ and I have to make a post request to a
> server,
> > > containing a string in the body section. Another -condition is that I
> have
> > > to specify the content-type as octet-stream. I've set the header,
> > > authentication and so on, but there is one problem: the curl function
> > > (CURLOPT_POSTFIELDS) takes as argument a c-string. In my string there
> are
> > > also NUL characters, which have to be sent. When I try sending the
> request
> > > the body is truncated at the first NUL chararcter.
> >
> > Set CURLOPT_POSTFIELDSIZE to the size of the data and it will not do
> strlen()
> > to figure out the size.
> >
> > I also just filed https://github.com/curl/curl/pull/6943 to clarify
> this
> > better.
> >
> > --
> >
> > / daniel.haxx.se
> > | Commercial curl support up to 24x7 is available!
> > | Private help, bug fixes, support, ports, new features
> > | https://www.wolfssl.com/contact/
> -------------------------------------------------------------------
> Unsubscribe: https://cool.haxx.se/list/listinfo/curl-library
> Etiquette: https://curl.se/mail/etiquette.html


-------------------------------------------------------------------
Unsubscribe: https://cool.haxx.se/list/listinfo/curl-library
Etiquette: https://curl.se/mail/etiquette.html
Received on 2021-04-26