TCPIP_HTTP_URLDecode Function

uint8_t* TCPIP_HTTP_URLDecode(
    uint8_t* cData
);

This function parses a string from URL encoding to plain-text. The following conversions are made: ‘=’ to ‘0’, ‘&’ to ‘0’, ‘+’ to ‘ ‘, and “%xx” to a single hex byte. After completion, the data has been decoded and a null terminator signifies the end of a name or value. A second null terminator (or a null name parameter) indicates the end of all the data.

The data parameter is null terminated and has at least one extra byte free.

A pointer to the last null terminator in data, which is also the first free byte for new data.

This function is called by the stack to parse GET arguments and cookie data. User applications can use this function to decode POST data, but first need to verify that the string is null-terminated.