The Content-Encoding header indicates what additional content codings have been applied to the entity-body.
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The Content-Encoding header indicates what additional content codings have been applied to the entity-body.
Its syntax is defined in [H14.11] and [S20.12] as follows:
Content-Encoding = ( "Content-Encoding" / "e" ) ":" 1#content-coding
content-coding = token
§ MSG_CONTENT_ENCODING_INIT
#define MSG_CONTENT_ENCODING_INIT |
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§ msg_content_encoding_t
The structure msg_content_encoding_t contains representation of an Content-Encoding header.
The msg_content_encoding_t is defined as follows:
§ anonymous enum
Enumerator |
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msg_content_encoding_hash | Hash of Content-Encoding header.
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§ msg_content_encoding_copy()
Copy an msg_content_encoding_t header structure.
The function msg_content_encoding_copy() copies a header structure header. If the header structure header contains a reference (header->h_next
) to a list of headers, all the headers in that list are copied, too. The function uses given memory home to allocate all the memory areas used to copy the header structure header.
- Parameters
-
home | memory home used to allocate new structure |
header | pointer to the header structure to be duplicated |
When copying, only the header structure and parameter lists attached to it are duplicated. The new header structure retains all the references to the strings within the old header, including the encoding of the old header, if present.
- Example
- Returns
- The function msg_content_encoding_copy() returns a pointer to newly copied header structure, or NULL upon an error.
§ msg_content_encoding_dup()
Duplicate (deep copy) msg_content_encoding_t.
The function msg_content_encoding_dup() duplicates a header structure header. If the header structure header contains a reference (header->x_next
) to a list of headers, all the headers in the list are duplicated, too.
- Parameters
-
home | memory home used to allocate new structure |
header | header structure to be duplicated |
When duplicating, all parameter lists and non-constant strings attached to the header are copied, too. The function uses given memory home to allocate all the memory areas used to copy the header.
- Example
- Returns
- The function msg_content_encoding_dup() returns a pointer to the newly duplicated msg_content_encoding_t header structure, or NULL upon an error.
§ msg_content_encoding_format()
Make a Content-Encoding header from formatting result.
The function msg_content_encoding_format() makes a new Content-Encoding header object using snprintf-formatted result as its value. The function first prints the arguments according to the format fmt specified. Then it allocates a new header structure, and uses the formatting result as the header value.
- Parameters
-
home | memory home used to allocate new header structure. |
fmt | string used as a printf()-style format |
... | argument list for format |
- Note
- This function may be implemented as a macro calling msg_header_format().
- Returns
- The function msg_content_encoding_format() returns a pointer to newly makes header structure, or NULL upon an error.
§ msg_content_encoding_init()
§ msg_content_encoding_make()
§ msg_is_content_encoding()
Test if header object is an instance of msg_content_encoding_t.
The function msg_is_content_encoding() returns true (nonzero) if the header class is an instance of Content-Encoding header object and false (zero) otherwise.
- Parameters
-
header | pointer to the header structure to be tested |
- Returns
- The function msg_is_content_encoding() returns true (nonzero) if the header object is an instance of header Content-Encoding header and false (zero) otherwise.
§ msg_content_encoding_class
Header class for Content-Encoding header.
The header class msg_content_encoding_class defines how a Content-Encoding header header is parsed and printed. It also contains methods used by message parser and other functions to manipulate the msg_content_encoding_t header structure.