Request attributes contain request-specific
information and apply only to the current request. A client
application sends this information to Amazon Lex. Use request attributes
to pass information that doesn't need to persist for the entire
session. You can create your own request attributes or you can use
predefined attributes. To send request attributes, use the
x-amz-lex-request-attributes header in a
RecognizeUtterance or the
requestAttributes field in a
RecognizeText request. Because request
attributes don't persist across requests like session attributes do,
they are not returned in RecognizeUtterance or
RecognizeText responses.
Note
To send information that persists across requests, use session attributes.
Setting user-defined request
attributes for each Lex V2 bot request
A user-defined request attribute is data
that you send to your bot in each request. You send the
information in the amz-lex-request-attributes
header of a RecognizeUtterance request or in the
requestAttributes field of a
RecognizeText request.
To send request attributes to Amazon Lex, you create a string-to-string map of the attributes. The following shows how to map request attributes:
{
"attributeName": "attributeValue",
"attributeName": "attributeValue"
}For the PostText operation, you insert the map
into the body of the request using the
requestAttributes field, as follows:
"requestAttributes": {
"attributeName": "attributeValue",
"attributeName": "attributeValue"
}For the PostContent operation, you base64 encode
the map, and then send it as the
x-amz-lex-request-attributes header.
If you are sending binary or structured data in a request attribute, you must first transform the data to a simple string. For more information, see Setting complex attributes in your Lex V2 bot.
