Can HTTP headers be duplicate?

Can HTTP headers be duplicate?

Yes. So, multiple headers with the same name is ok (www-authenticate is such a case) if the entire field-value is defined as a comma-separated list of values.

Can you have multiple HTTP headers with the same name?

A recipient MAY combine multiple header fields with the same field name into one field-name: field-value pair, without changing the semantics of the message, by appending each subsequent field value to the combined field value in order, separated by a comma.

Can HTTP headers have multiple values?

The HTTP Headers can have one or more values depending on the header field definitions. A multi-valued header will have comma separated values.

Does HTTP header order matter?

The order in which header fields with differing field names are received is not significant. However, it is “good practice” to send general-header fields first, followed by request-header or response- header fields, and ending with the entity-header fields.

What are headers in HTTP request?

An HTTP header is a field of an HTTP request or response that passes additional context and metadata about the request or response. For example, a request message can use headers to indicate it’s preferred media formats, while a response can use header to indicate the media format of the returned body.

What headers are required in an HTTP request?

The HTTP Request Headers List

  • A-IM.
  • Accept.
  • Accept-Charset.
  • Accept-Encoding.
  • Accept-Language.
  • Accept-Datetime.
  • Access-Control-Request-Method.
  • Access-Control-Request-Headers.

Are HTTP headers encrypted?

Yes, headers are encrypted. It’s written here. Everything in the HTTPS message is encrypted, including the headers, and the request/response load. Wikipedia is not the spec, which is what you should be quoting.

Are HTTP headers mandatory?

It depends on what you define as being required: there are no header fields that must be sent with every response no matter what the circumstances are, but there are header fields that you really should send. The only header field that comes close is Date , but even it has circumstances under which it is not required.