One common practice is to include JWTs in the Authorization header, prefaced by the "Bearer" string.
What is the reason for this approach, and why not just send the token in the body of a post request? Is there an easy way to authenticate the token in node when it's sent in the header?
The inclusion of JWT bearer tokens in requests poses a security risk, as they can be utilized by anyone holding the token to assume your identity. It is imperative to handle them with caution and refrain from storing them in server logs or allowing them in cross-origin requests.
To ensure proper handling of sensitive information, all parties involved must be aware of which parts of a request contain such data. While some may only recognize the payload containing the token, others like proxies, server frameworks, and browsers may not. On the other hand, the presence of an Authorization header universally signifies the inclusion of sensitive details. Browsers, for instance, will not send cross-origin requests with this header unless preceded by a successful preflight request with
Access-Control-Request-Headers: AuthorizationIn essence, it is crucial for HTTP requests to consistently place certain types of information, such as authorization details, in designated locations like predefined headers.
Here is a standard specification known as Official Internet Protocol Standards
The OAuth 2.0 Authorization Framework: Bearer Token UsageThis pertains to the RFC specification rfc6750 in section
2.1. Authorization Request Header FieldView image version https://i.stack.imgur.com/Nhlxl.png
Read text version
2.1. Authorization Request Header Field
To transmit the access token via the "Authorization" request header field specified by HTTP/1.1 [RFC2617], the client employs the "Bearer"
authentication scheme.
Example:
GET /resource HTTP/1.1
Host: server.example.com
Authorization: Bearer mF_9.B5f-4.1JqM
The syntax of the "Authorization" header field for this particular scheme
aligns with the usage pattern defined in Section 2 of
[RFC2617]. Please note that, similar to Basic, it does not adhere to the
generic syntax from Section 1.2 of [RFC2617] but works with
the overarching authentication framework being developed for
HTTP 1.1 [HTTP-AUTH], although it deviates slightly from the recommended
practice outlined therein to acknowledge existing deployments.
The structure for Bearer credentials is illustrated below:
b64token = 1*( ALPHA / DIGIT /
"-" / "." / "_" / "~" / "+" / "/" ) *"="
credentials = "Bearer" 1*SP b64token
Clients are encouraged to make authenticated requests using
a bearer token employing the "Authorization" request header field along with the "Bearer" HTTP
authorization method. Resource servers are mandated to support this procedure.
Token types such as Basic and Digest also utilize the concept of Bearer
This guide simplifies the understanding of Token concepts.
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