C#

curl with Variable Substitution in an XML Request Body

See more CURL Examples

This example shows how to use variables inside an XML request body using the {{variable_name}} syntax. When the HTTP request’s Content-Type indicates XML, Chilkat automatically applies proper XML entity encoding to each substituted value, ensuring the resulting XML remains valid. C#

bool success = false;

//  Variable names are enclosed between {{ and }}

//  curl -X POST https://api.example.com/api/orders \
//    -H "Content-Type: application/xml; charset=utf-8" \
//    -H "Accept: application/xml" \
//    -d '<order>
//    <customerName>{{customer_name}}</customerName>
//    <note>{{note}}</note>
//    <address>{{address}}</address>
//    <instructions>{{instructions}}</instructions>
//  </order>'

Chilkat.StringBuilder sbCurl = new Chilkat.StringBuilder();
sbCurl.AppendLn("curl -X POST https://api.example.com/api/orders \\");
sbCurl.AppendLn("  -H \"Content-Type: application/xml; charset=utf-8\" \\");
sbCurl.AppendLn("  -H \"Accept: application/xml\" \\");
sbCurl.AppendLn("  -d '<order>");
sbCurl.AppendLn("  <customerName>{{customer_name}}</customerName>");
sbCurl.AppendLn("  <note>{{note}}</note>");
sbCurl.AppendLn("  <address>{{address}}</address>");
sbCurl.AppendLn("  <instructions>{{instructions}}</instructions>");
sbCurl.AppendLn("</order>'");

Chilkat.HttpCurl curl = new Chilkat.HttpCurl();

//  The values below contain chars that will require XML entity encoding.  
//  Chilkat will automatically do the encoding because the Content-Type of this request is "application/xml"
curl.SetVar("customer_name","John & Sons");
curl.SetVar("note","He said \"Ship it ASAP!\"");
curl.SetVar("address","123 <Main> Street");
curl.SetVar("instructions","Use door #2 & call upon arrival");

//  To demonstrate how the variables are replaced, this example does not execute the curl command. 
//  Instead, it generates the raw HTTP request that would be sent if the curl command were run.
Chilkat.StringBuilder sbRawRequest = new Chilkat.StringBuilder();
success = curl.ToRawRequest(sbCurl.GetAsString(),sbRawRequest);
if (success == false) {
    Debug.WriteLine(curl.LastErrorText);
    return;
}

Debug.WriteLine(sbRawRequest.GetAsString());

//  The output is shown below.
//  Notice the chars that were XML entity encoded.

//  POST /api/orders HTTP/1.1
//  Accept: application/xml
//  Host: api.example.com
//  Content-Type: application/xml; charset=utf-8
//  Content-Length: 229
//  
//  <order>
//    <customerName>John &amp; Sons</customerName>
//    <note>He said &quot;Ship it ASAP!&quot;</note>
//    <address>123 &lt;Main&gt; Street</address>
//    <instructions>Use door #2 &amp; call upon arrival</instructions>
//  </order>