Hi there,

I have a few questions concerning the libcurl C Interface:

I got a running C Client using sockets which talks with a webservice via
HTTP using a SOAP attachment and
a XML attachment. You can find the orginal source code of this client under
http://cvs.x-act.org/cgi-bin/viewcvs.cgi/xact_client_adv_c/src/xclient.c?rev
=1.3&content-type=text/vnd.viewcvs-markup

it send messages like this to the webservice:

<snip>
        POST http://www.x-act.org:8080/conversion HTTP/1.0
        User-Agent: "xact_client_adv_php V1.11"
        Host: www.x-act.org
        Content-Type: multipart/related; type="text/xml";
boundary="==7b6db914c4d750a6773afdc5f8cdf8a9=="
        Content-Length: 1002
        SOAPAction: ""

        --==7b6db914c4d750a6773afdc5f8cdf8a9==
        Content-Type: text/xml

        <?xml version="1.0" encoding="UTF-8"?>
        <soap-env:Envelope
xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/">
          <soap-env:Header>
            <m:msgID
xmlns:m="http://www.x-act.org">php-3aea18c9cb28e9a23f249dc34d41ec7d</m:msgID
>
          </soap-env:Header>
          <soap-env:Body>
            <m:DoAdvancedConversion xmlns:m="http://www.x-act.org">
            <sourceformat>xcbl</sourceformat>
            <sourceschema>foo</sourceschema>
            <targetformat>oagis</targetformat>
            <targetschema>foo2</targetschema>
            <area>hospital</area>
            <documenttype>purchase</documenttype>
            <usergroup>business</usergroup>
            <username>anonymous</username>
            <password>dummy_at_dummy.de</password>
            </m:DoAdvancedConversion>
          </soap-env:Body>
        </soap-env:Envelope>
        --==7b6db914c4d750a6773afdc5f8cdf8a9==
        Content-Type: application/xml

        <root>
        <element1>wort 1</element1>
        <element2>wort 2</element2>
      </root>
        --==7b6db914c4d750a6773afdc5f8cdf8a9==--
</snip>

(1)
Now my task is, to rewrite this C client to use HTTPS - works fine for a php
client using cURL and
the CURLOPT_CUSTOMREQUEST, cause I must limit the size of the attachments,
so no server timeout occurs.
But using pure C I have to watch the memory size, there should be now file
size limit for the xml attachment.
As far I understood the examples there is no possibility for streaming/using
sockets - you only can use
strings which (as far as I know) are restricted to 64k in pure C.
Is this right so far or did I oversee anything? (I'm anything else than a C
guru *g*)
Is there a workaround for this? How could I generate this message above with
any XML attachment.
Guess CURLOPT_CUSTOMREQUEST wont work in this case anymore...

(2)
so I played a little bit around

<snip>
        ...
        curl_easy_setopt(curl, CURLOPT_URL,
"http://www.x-act.org:8080/conversion");
        curl_easy_setopt(curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
        curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
        curl_easy_setopt(curl, CURLOPT_CRLF, 1);

        /* Header */
        headers = curl_slist_append(headers, "Pragma:");
        headers = curl_slist_append(headers, "Accept:");
        headers = curl_slist_append(headers, "SOAPAction: \"\"");
        headers = curl_slist_append(headers, "User-Agent:
\"xact_client_adv_c V1.1 (Linux)(SSL)\"");
        headers = curl_slist_append(headers, "Host: www.x-act.org");
        headers = curl_slist_append(headers, "SOAPAction: \"\"");
        headers = curl_slist_append(headers, "Content-Type:
multipart/related; type=\"text/xml\";");

        curl_formadd(&post, &last, CURLFORM_COPYNAME, "soap",
                                   CURLFORM_COPYCONTENTS, soap,
                                   CURLFORM_CONTENTTYPE, "text/xml",
                                   CURLFORM_END);
        curl_formadd(&post, &last, CURLFORM_COPYNAME, "xml",
                                   CURLFORM_COPYCONTENTS, xml,
                                   CURLFORM_CONTENTTYPE, "application/xml",
                                   CURLFORM_END);

        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
        curl_easy_setopt(curl, CURLOPT_HTTPPOST, post);
        res = curl_easy_perform(curl);
        ...
</snip>
there is the problem, that libcurl always overwrites my content-type with
"Content-Type: multipart/form-data" + boundary.
Is there a way to force a own content type eg. multipart/related for
curl_formadd?

(3)
If I use CURLOPT_VERBOSE I only see the send header - is there a way to see
the full body too?

Thank you for any answers

Greetings Robert

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Received on 2002-12-04