(Tcl) Send HTTP POST using non-UTF8 such as Windows-1250

Demonstrates how to specify the character encoding (charset) to be used for the body of an HTTP POST.

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

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load ./chilkat.dll

set success 0

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

set http [new_CkHttp]

set req [new_CkHttpRequest]

# Load a JSON file containing strings with Polish chars.
set json [new_CkJsonObject]

set success [CkJsonObject_LoadFile $json "qa_data/json/has_polish_chars.json"]
if {$success == 0} then {
    puts [CkJsonObject_lastErrorText $json]
    delete_CkHttp $http
    delete_CkHttpRequest $req
    delete_CkJsonObject $json
    exit
}

# Add the request params expected by the server-side:
CkHttpRequest_AddParam $req "tytul" [CkJsonObject_stringOf $json "tytul"]
CkHttpRequest_AddParam $req "tresc" [CkJsonObject_stringOf $json "tresc"]

# Indicate we wish to explicitly send the charset attribute in the HTTP request header.
CkHttpRequest_put_SendCharset $req 1

# Send the POST
# You can send the POST to the URL below.  It will respond with the request body in quoted-printable format.
# Using quoted-printable, we can easily see the binary bytes for the accented chars.

CkHttpRequest_put_HttpVerb $req "POST"
CkHttpRequest_put_ContentType $req "application/x-www-form-urlencoded"

set resp [new_CkHttpResponse]

set success [CkHttp_HttpReq $http "https://www.chilkatsoft.com/echoPost.cshtml" $req $resp]
if {$success == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkHttp $http
    delete_CkHttpRequest $req
    delete_CkJsonObject $json
    delete_CkHttpResponse $resp
    exit
}

puts [CkHttp_lastHeader $http]
puts [CkHttpResponse_bodyStr $resp]

# Sample output:

# --------------------------------------------------
# POST /echoPost.cshtml HTTP/1.1
# Host: www.chilkatsoft.com
# Content-Type: application/x-www-form-urlencoded; charset=utf-8
# Content-Length: 79
# 
# <pre>tytul=3DPrzyk%C5%82ad&amp;tresc=3DPrzyk%C5%82ad
# %82oszenie</pre>
# --------------------------------------------------

# We can see by the %C5%82 that utf-8 was sent, because %C5%82 is the 2-byte representation of a particular Polish char.

# -----------------------
# However.. we can change the charset used for the HTTP request by specifying the request object's charset.

CkHttpRequest_put_SendCharset $req 1
CkHttpRequest_put_Charset $req "windows-1250"
CkHttpRequest_put_HttpVerb $req "POST"
CkHttpRequest_put_ContentType $req "application/x-www-form-urlencoded"

set success [CkHttp_HttpReq $http "https://www.chilkatsoft.com/echoPost.cshtml" $req $resp]
if {$success == 0} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkHttp $http
    delete_CkHttpRequest $req
    delete_CkJsonObject $json
    delete_CkHttpResponse $resp
    exit
}

puts [CkHttp_lastHeader $http]
puts [CkHttpResponse_bodyStr $resp]

# Sample output...
# You can see how the bytes used for the Polish chars are now 1-byte per char (i.e. using Windows-1250) 

# --------------------------------------------------
# POST /echoPost.cshtml HTTP/1.1
# Host: www.chilkatsoft.com
# Content-Type: application/x-www-form-urlencoded; charset=windows-1250
# Content-Length: 70
# 
# <pre>tytul=3DPrzyk%B3ad&amp;tresc=3DPrzyk%B3ad
# e</pre>
# --------------------------------------------------

delete_CkHttp $http
delete_CkHttpRequest $req
delete_CkJsonObject $json
delete_CkHttpResponse $resp