Visual FoxPro

Demonstrate the Global.AutoQBDecode property

The Global.AutoQBDecode property can be set to _TRUE_ to cause Q/B encoded string arguments passed to any Chilkat method to be automatically decoded before being used.

Note: This example requires Chilkat v10.0.0 or later.

Visual FoxPro

LOCAL loGlob
LOCAL lcS_cafe
LOCAL loS1
LOCAL lcS_hello
LOCAL loS2

* Turn on auto Q/B decoding for all strings passed to any Chilkat method in any Chilkat class.
loGlob = CreateObject('Chilkat.Global')
loGlob.AutoQBDecode = 1

* ---------------------------------------------------------------------------------------------------------------------------------------------
* "Q" Encoding

* Quoted-Printable encoding is primarily used for text that is mostly ASCII with some non-ASCII characters. 
* It encodes these characters in a way that remains mostly readable and compatible with ASCII-only systems.

* How It Works with UTF-8:
* - ASCII characters (except special characters like `=`) are encoded as themselves.
* - Non-ASCII characters are represented by their UTF-8 byte values, each byte encoded as `=` followed by two hexadecimal digits. 
*   For example, the UTF-8 character "é" (U+00E9) is encoded as `=C3=A9`.

* For example, consider the text "Café" encoded in UTF-8. The UTF-8 bytes for "é" are `C3 A9`, so in Quoted-Printable, it looks like this:  Caf=C3=A9

* The "Q" encoding has this syntax:  "=?charset?q?encoded_text?="
* For example: "=?UTF-8?Q?Caf=C3=A9_announcement?="

* ------
* "B" Encoding

* Base64 encoding is used to encode non-ASCII text, making it more suitable for text with a high density of non-ASCII characters, such as those found in non-Western European languages.

* For example, consider the text "こんにちは" ("Hello" in Japanese).
* The "B" encoded string would be "=?UTF-8?B?44GT44KT44Gr44Gh44Gv?="

* ------
* Q encoding is suitable for text that is mostly ASCII.
* B Encoding is best for text that is densely packed with non-us-ascii chars, such as non-Latin (Asian) languages.
* ---------------------------------------------------------------------------------------------------------------------------------------------

* You can use Chilkat's online tool at Online Binary Encoder to pre-encode your literal strings before
* inserting them into your source code.

* When using the online tool, choose either "MIME header Q Encoding" or "MIME Header B Encoding".

* For example:
lcS_cafe = "=?utf-8?Q?Caf=C3=A9?="
loS1 = CreateObject('Chilkat.StringBuilder')
loS1.Append(lcS_cafe)
? loS1.GetAsString()
* Output is Café

lcS_hello = "=?UTF-8?B?44GT44KT44Gr44Gh44Gv?="
loS2 = CreateObject('Chilkat.StringBuilder')
loS2.Append(lcS_hello)
? loS2.GetAsString()
* Output is こんにちは

RELEASE loGlob
RELEASE loS1
RELEASE loS2