(Visual FoxPro) URL Encoding Charset in POST Query Params

Demonstrates how to control the URL encoding charset in POST query params.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL lnSuccess
LOCAL lcNameWin1252Encoded
LOCAL loSb
LOCAL loHttp
LOCAL loReq
LOCAL loResp

lnSuccess = 0

* This example requires the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

* We have the string "MÆRSK".
lcNameWin1252Encoded = "M%E6RSK"

loSb = CreateObject('Chilkat.StringBuilder')
lnSuccess = loSb.DecodeAndAppend(lcNameWin1252Encoded,"url","windows-1252")

loHttp = CreateObject('Chilkat.Http')

* We're setting the session log filename so we can see the exact request sent.
loHttp.SessionLogFilename = "qa_output/sessionLog.txt"

* First demonstrate a simple application/x-www-form-urlencoded POST

loReq = CreateObject('Chilkat.HttpRequest')

* Set the Charset = "utf-8" to cause URL encoding to use utf-8.
loReq.Charset = "utf-8"

loReq.AddParam("name",loSb.GetAsString())

loReq.HttpVerb = "POST"
loReq.ContentType = "application/x-www-form-urlencoded"

loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpReq("https://www.chilkatsoft.com/something",loReq,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loSb
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    CANCEL
ENDIF

* This is the request that is sent:
* Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

* 	POST /something HTTP/1.1
* 	Host: www.chilkatsoft.com
* 	Content-Type: application/x-www-form-urlencoded
* 	Content-Length: 15
* 
* 	name=M%C3%A6RSK

* ---------------------------------------------------------------
* Switch to windows-1252

loReq.Charset = "windows-1252"
loReq.HttpVerb = "POST"
loReq.ContentType = "application/x-www-form-urlencoded"

lnSuccess = loHttp.HttpReq("https://www.chilkatsoft.com/something",loReq,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loSb
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    CANCEL
ENDIF

* This is the request that is sent:
* Notice that windows-1252 is used in the query param (the letter 'Æ' is %E6)

* 	POST /something HTTP/1.1
* 	Host: www.chilkatsoft.com
* 	Content-Type: application/x-www-form-urlencoded
* 	Content-Length: 12
* 
* 	name=M%E6RSK

* ---------------------------------------------------------------
* Let's do the same with HttpSReq, switching back to utf-8

loReq.Path = "/something"
loReq.HttpVerb = "POST"
loReq.ContentType = "application/x-www-form-urlencoded"

loReq.Charset = "utf-8"
lnSuccess = loHttp.HttpSReq("www.chilkatsoft.com",443,1,loReq,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loSb
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    CANCEL
ENDIF

* This is the request that is sent:
* Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

* 	POST /something HTTP/1.1
* 	Host: www.chilkatsoft.com
* 	Content-Type: application/x-www-form-urlencoded
* 	Content-Length: 15
* 
* 	name=M%C3%A6RSK

* ---------------------------------------------------------------
* Let's do a POST with XML body where the query params are in the HTTP request start line, 
* and the Content-Type is text/xml where the body of the request is XML.

loReq.Path = "/something"
loReq.HttpVerb = "POST"
loReq.ContentType = "text/xml"
lnSuccess = loReq.LoadBodyFromString("<test>123</test>","utf-8")
loReq.Charset = "utf-8"

* Remember... our request object still contains the query param added in the above call to AddParam.
lnSuccess = loHttp.HttpSReq("www.chilkatsoft.com",443,1,loReq,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loSb
    RELEASE loHttp
    RELEASE loReq
    RELEASE loResp
    CANCEL
ENDIF

* This is the request that is sent:
* Notice that utf-8 is used in the query param (the letter 'Æ' is %C3%A6)

* 	POST /something?name=M%C3%A6RSK HTTP/1.1
* 	Host: www.chilkatsoft.com
* 	Content-Type: text/xml
* 	Content-Length: 16
* 
* 	<test>123</test>

RELEASE loSb
RELEASE loHttp
RELEASE loReq
RELEASE loResp