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#ifndef AWS_HTTP_STRUTIL_H
#define AWS_HTTP_STRUTIL_H
/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/http/http.h>
AWS_EXTERN_C_BEGIN
/**
* Return a cursor with all leading and trailing SPACE and TAB characters removed.
* RFC7230 section 3.2.3 Whitespace
* Examples:
* " \t a \t " -> "a"
* "a \t a" -> "a \t a"
*/
AWS_HTTP_API
struct aws_byte_cursor aws_strutil_trim_http_whitespace(struct aws_byte_cursor cursor);
/**
* Return whether this is a valid token, as defined by RFC7230 section 3.2.6:
* token = 1*tchar
* tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*"
* / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
* / DIGIT / ALPHA
*/
AWS_HTTP_API
bool aws_strutil_is_http_token(struct aws_byte_cursor token);
/**
* Same as aws_strutil_is_http_token(), but uppercase letters are forbidden.
*/
AWS_HTTP_API
bool aws_strutil_is_lowercase_http_token(struct aws_byte_cursor token);
/**
* Return whether this ASCII/UTF-8 sequence is a valid HTTP header field-value.
*
* As defined in RFC7230 section 3.2 (except we are ALWAYS forbidding obs-fold):
*
* field-value = *( field-content / obs-fold )
* field-content = field-vchar [ 1*( SP / HTAB ) field-vchar ]
* field-vchar = VCHAR / obs-text
* VCHAR = %x21-7E ; visible (printing) characters
* obs-text = %x80-FF
*
* Note that we ALWAYS forbid obs-fold. Section 3.2.4 explains how
* obs-fold is deprecated "except within the message/http media type".
*/
AWS_HTTP_API
bool aws_strutil_is_http_field_value(struct aws_byte_cursor cursor);
/**
* Return whether this ASCII/UTF-8 sequence is a valid HTTP response status reason-phrase.
*
* As defined in RFC7230 section 3.1.2:
*
* reason-phrase = *( HTAB / SP / VCHAR / obs-text )
* VCHAR = %x21-7E ; visible (printing) characters
* obs-text = %x80-FF
*/
AWS_HTTP_API
bool aws_strutil_is_http_reason_phrase(struct aws_byte_cursor cursor);
/**
* Return whether this ASCII/UTF-8 sequence is a valid HTTP request-target.
*
* TODO: Actually check the complete grammar as defined in RFC7230 5.3 and
* RFC3986. Currently this just checks whether the sequence is blatantly illegal
* (ex: contains CR or LF)
*/
AWS_HTTP_API
bool aws_strutil_is_http_request_target(struct aws_byte_cursor cursor);
/**
* Return whether this ASCII/UTF-8 sequence start with ":" or not as the requirement for pseudo headers.
*/
AWS_HTTP_API
bool aws_strutil_is_http_pseudo_header_name(struct aws_byte_cursor cursor);
AWS_EXTERN_C_END
#endif /* AWS_HTTP_STRUTIL_H */
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