Functions to parse UPnP messages like requests and responses. More...

#include <LinkedList.hpp>
#include <membuffer.hpp>
#include <upnp.hpp>
#include <uri.hpp>
#include <UPnPsdk/strintmap.hpp>

Include dependency graph for httpparser.hpp:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
struct	scanner_t
	Structure of a scanner object. More...

struct	http_header_t
	Structure of an HTTP header object. More...

struct	http_message_t
	Structure of an HTTP message. More...

struct	http_parser_t
	Structure of an HTTP parser object. More...

Macros
Constants that define the read method.
#define	ENTREAD_DETERMINE_READ_METHOD 1
	Defines read method.

#define	ENTREAD_USING_CLEN 2
	Defines read method.

#define	ENTREAD_USING_CHUNKED 3
	Defines read method.

#define	ENTREAD_UNTIL_CLOSE 4
	Defines read method.

#define	ENTREAD_CHUNKY_BODY 5
	Defines read method.

#define	ENTREAD_CHUNKY_HEADERS 6
	Defines read method.

Different types of HTTP headers.
#define	HDR_UNKNOWN -1
	Type of a HTTP header.

#define	HDR_CACHE_CONTROL 1
	Type of a HTTP header.

#define	HDR_CALLBACK 2
	Type of a HTTP header.

#define	HDR_CONTENT_LENGTH 3
	Type of a HTTP header.

#define	HDR_CONTENT_TYPE 4
	Type of a HTTP header.

#define	HDR_DATE 5
	Type of a HTTP header.

#define	HDR_EXT 6
	Type of a HTTP header.

#define	HDR_HOST 7
	Type of a HTTP header.

#define	HDR_LOCATION 11
	Type of a HTTP header.

#define	HDR_MAN 12
	Type of a HTTP header.

#define	HDR_MX 13
	Type of a HTTP header.

#define	HDR_NT 14
	Type of a HTTP header.

#define	HDR_NTS 15
	Type of a HTTP header.

#define	HDR_SERVER 16
	Type of a HTTP header.

#define	HDR_SEQ 17
	Type of a HTTP header.

#define	HDR_SID 18
	Type of a HTTP header.

#define	HDR_SOAPACTION 19
	Type of a HTTP header.

#define	HDR_ST 20
	Type of a HTTP header.

#define	HDR_TIMEOUT 21
	Type of a HTTP header.

#define	HDR_TRANSFER_ENCODING 22
	Type of a HTTP header.

#define	HDR_USN 23
	Type of a HTTP header.

#define	HDR_USER_AGENT 24
	Type of a HTTP header.

Adding new header definitions
#define	HDR_ACCEPT 25
	Header definition.

#define	HDR_ACCEPT_ENCODING 26
	Header definition.

#define	HDR_ACCEPT_CHARSET 27
	Header definition.

#define	HDR_ACCEPT_LANGUAGE 28
	Header definition.

#define	HDR_ACCEPT_RANGE 29
	Header definition.

#define	HDR_CONTENT_ENCODING 30
	Header definition.

#define	HDR_CONTENT_LANGUAGE 31
	Header definition.

#define	HDR_CONTENT_LOCATION 32
	Header definition.

#define	HDR_CONTENT_RANGE 33
	Header definition.

#define	HDR_IF_RANGE 34
	Header definition.

#define	HDR_RANGE 35
	Header definition.

#define	HDR_TE 36
	Header definition.

Enumerations
enum	parser_pos_t { POS_REQUEST_LINE , POS_RESPONSE_LINE , POS_HEADERS , POS_ENTITY , POS_COMPLETE }
	Type of a parser position. More...

enum	http_method_t { HTTPMETHOD_PUT = UPNP_HTTPMETHOD_PUT , HTTPMETHOD_DELETE = UPNP_HTTPMETHOD_DELETE , HTTPMETHOD_GET = UPNP_HTTPMETHOD_GET , HTTPMETHOD_HEAD = UPNP_HTTPMETHOD_HEAD , HTTPMETHOD_POST = UPNP_HTTPMETHOD_POST , HTTPMETHOD_MPOST , HTTPMETHOD_SUBSCRIBE , HTTPMETHOD_UNSUBSCRIBE , HTTPMETHOD_NOTIFY , HTTPMETHOD_MSEARCH , HTTPMETHOD_UNKNOWN , SOAPMETHOD_POST , HTTPMETHOD_SIMPLEGET }
	Method in a HTTP request. More...

enum	parse_status_t { PARSE_SUCCESS = 0 , PARSE_INCOMPLETE , PARSE_INCOMPLETE_ENTITY , PARSE_FAILURE , PARSE_OK , PARSE_NO_MATCH , PARSE_CONTINUE_1 }
	Status of parsing. More...

Functions
void	httpmsg_destroy (http_message_t *msg)
	Free memory allocated for the http message.

http_header_t *	httpmsg_find_hdr_str (http_message_t msg, const char header_name)
	Compares the header name with the header names stored in the linked list of messages.

http_header_t *	httpmsg_find_hdr (http_message_t msg, int header_name_id, memptr value)
	Finds header from a list, with the given 'name_id'.

void	parser_request_init (http_parser_t *parser)
	Initializes parser object for a request.

void	parser_response_init (http_parser_t *parser, http_method_t request_method)
	Initializes parser object for a response.

parse_status_t	parser_parse (http_parser_t *parser)
	The parser function.

parse_status_t	parser_parse_responseline (http_parser_t *parser)
	Get HTTP Method, URL location and version information.

parse_status_t	parser_parse_headers (http_parser_t *parser)
	Get HTTP Method, URL location and version information.

parse_status_t	parser_parse_entity (http_parser_t *parser)
	Determines method to read entity.

parse_status_t	parser_get_entity_read_method (http_parser_t *parser)
	Determines method to read entity.

parse_status_t	parser_append (http_parser_t parser, const char buf, size_t buf_length)
	Append date to HTTP parser, and do the parsing.

parse_status_t	matchstr (char str, size_t slen, const char fmt,...)
	Matches a variable parameter list with a string and takes actions based on the data type specified.

int	raw_to_int (memptr *raw_value, int base)
	Converts raw character data to integer value.

int	raw_find_str (memptr raw_value, const char str)
	Find a substring from raw character string buffer.

const char *	method_to_str (http_method_t method)
	A wrapper function that maps a method id to a method.

void	print_http_headers (std::string_view log_msg, http_message_t *hmsg)
	Print the HTTP headers.

Variables
constexpr std::array< const UPnPsdk::str_int_entry, 33 >	Http_Header_Names
	Assigns header-name id to its text representation.

Detailed Description

Functions to parse UPnP messages like requests and responses.

Definition in file httpparser.hpp.

Class Documentation

◆ scanner_t

struct scanner_t

Structure of a scanner object.

Definition at line 76 of file httpparser.hpp.

Collaboration diagram for scanner_t:

Class Members
membuffer *	msg	Raw http message.
size_t	cursor	Current position in buffer.
int	entire_msg_loaded	Completeness of 'msg'. Set to 1 if the entire message is loaded in 'msg'. Set to 0 if only a partial message is in 'msg'. Default is 0.

◆ http_header_t

struct http_header_t

Structure of an HTTP header object.

Definition at line 211 of file httpparser.hpp.

Collaboration diagram for http_header_t:

Class Members
memptr	name	Header name as a string.
int	name_id	Header name id (for a selective group of headers only).
membuffer	value	Raw-value; could be multi-lined; min-length = 0.
membuffer	name_buf	(Private use – don't touch.)

◆ http_message_t

struct http_message_t

Structure of an HTTP message.

Definition at line 223 of file httpparser.hpp.

Collaboration diagram for http_message_t:

Class Members
int	initialized	Indicates if the object is initialized.
http_method_t	method	Http method of an outgoing request.
uri_type	uri	Type of a uri, e.g. absolute, relative, etc.
http_method_t	request_method	Http method of an incoming response.
int	status_code	???
membuffer	status_msg	???
size_t	amount_discarded	The amount of data that's been read by the user, that's no longer in the raw message buffer.
int	is_request	If 1, msg is a request, else response.
int	major_version	Http major version.
int	minor_version	Http minor version.
LinkedList	headers	List of headers.
memptr	entity	message body(entity).
membuffer	msg	entire raw message.
char *	urlbuf	storage for url string.

◆ http_parser_t

struct http_parser_t

Structure of an HTTP parser object.

Definition at line 272 of file httpparser.hpp.

Collaboration diagram for http_parser_t:

Class Members
http_message_t	msg	entire raw message This contains the complete HTTP message with preceding header and message body. There is also the http_parser_t::entity_start_position available that points to the message body in the message.
int	http_error_code	read-only; in case of parse error, this contains the HTTP error code (4XX or 5XX).
int	valid_ssdp_notify_hack	read-only; this is set to 1 if a NOTIFY request has no content-length. used to read valid sspd notify msg.
parser_pos_t	position	Private data – don't touch.
int	ent_position	Private data – don't touch.
unsigned int	content_length	Private data – don't touch.
size_t	chunk_size	Private data – don't touch.
size_t	entity_start_position	Offset in the raw message buffer, which contains the message body. preceding this are the headers of the message.
scanner_t	scanner	???

Macro Definition Documentation

◆ ENTREAD_DETERMINE_READ_METHOD

#define ENTREAD_DETERMINE_READ_METHOD 1

Defines read method.

Definition at line 58 of file httpparser.hpp.

◆ ENTREAD_USING_CLEN

#define ENTREAD_USING_CLEN 2

Defines read method.

Definition at line 59 of file httpparser.hpp.

◆ ENTREAD_USING_CHUNKED

#define ENTREAD_USING_CHUNKED 3

Defines read method.

Definition at line 60 of file httpparser.hpp.

◆ ENTREAD_UNTIL_CLOSE

#define ENTREAD_UNTIL_CLOSE 4

Defines read method.

Definition at line 61 of file httpparser.hpp.

◆ ENTREAD_CHUNKY_BODY

#define ENTREAD_CHUNKY_BODY 5

Defines read method.

Definition at line 62 of file httpparser.hpp.

◆ ENTREAD_CHUNKY_HEADERS

#define ENTREAD_CHUNKY_HEADERS 6

Defines read method.

Definition at line 63 of file httpparser.hpp.

◆ HDR_UNKNOWN

#define HDR_UNKNOWN -1

Type of a HTTP header.

Definition at line 111 of file httpparser.hpp.

◆ HDR_CACHE_CONTROL

#define HDR_CACHE_CONTROL 1

Type of a HTTP header.

Definition at line 112 of file httpparser.hpp.

◆ HDR_CALLBACK

#define HDR_CALLBACK 2

Type of a HTTP header.

Definition at line 113 of file httpparser.hpp.

◆ HDR_CONTENT_LENGTH

#define HDR_CONTENT_LENGTH 3

Type of a HTTP header.

Definition at line 114 of file httpparser.hpp.

◆ HDR_CONTENT_TYPE

#define HDR_CONTENT_TYPE 4

Type of a HTTP header.

Definition at line 115 of file httpparser.hpp.

◆ HDR_DATE

#define HDR_DATE 5

Type of a HTTP header.

Definition at line 116 of file httpparser.hpp.

◆ HDR_EXT

#define HDR_EXT 6

Type of a HTTP header.

Definition at line 117 of file httpparser.hpp.

◆ HDR_HOST

#define HDR_HOST 7

Type of a HTTP header.

Definition at line 118 of file httpparser.hpp.

◆ HDR_LOCATION

#define HDR_LOCATION 11

Type of a HTTP header.

Definition at line 122 of file httpparser.hpp.

◆ HDR_MAN

#define HDR_MAN 12

Type of a HTTP header.

Definition at line 123 of file httpparser.hpp.

◆ HDR_MX

#define HDR_MX 13

Type of a HTTP header.

Definition at line 124 of file httpparser.hpp.

◆ HDR_NT

#define HDR_NT 14

Type of a HTTP header.

Definition at line 125 of file httpparser.hpp.

◆ HDR_NTS

#define HDR_NTS 15

Type of a HTTP header.

Definition at line 126 of file httpparser.hpp.

◆ HDR_SERVER

#define HDR_SERVER 16

Type of a HTTP header.

Definition at line 127 of file httpparser.hpp.

◆ HDR_SEQ

#define HDR_SEQ 17

Type of a HTTP header.

Definition at line 128 of file httpparser.hpp.

◆ HDR_SID

#define HDR_SID 18

Type of a HTTP header.

Definition at line 129 of file httpparser.hpp.

◆ HDR_SOAPACTION

#define HDR_SOAPACTION 19

Type of a HTTP header.

Definition at line 130 of file httpparser.hpp.

◆ HDR_ST

#define HDR_ST 20

Type of a HTTP header.

Definition at line 131 of file httpparser.hpp.

◆ HDR_TIMEOUT

#define HDR_TIMEOUT 21

Type of a HTTP header.

Definition at line 132 of file httpparser.hpp.

◆ HDR_TRANSFER_ENCODING

#define HDR_TRANSFER_ENCODING 22

Type of a HTTP header.

Definition at line 133 of file httpparser.hpp.

◆ HDR_USN

#define HDR_USN 23

Type of a HTTP header.

Definition at line 134 of file httpparser.hpp.

◆ HDR_USER_AGENT

#define HDR_USER_AGENT 24

Type of a HTTP header.

Definition at line 135 of file httpparser.hpp.

◆ HDR_ACCEPT

#define HDR_ACCEPT 25

Header definition.

Definition at line 141 of file httpparser.hpp.

◆ HDR_ACCEPT_ENCODING

#define HDR_ACCEPT_ENCODING 26

Header definition.

Definition at line 142 of file httpparser.hpp.

◆ HDR_ACCEPT_CHARSET

#define HDR_ACCEPT_CHARSET 27

Header definition.

Definition at line 143 of file httpparser.hpp.

◆ HDR_ACCEPT_LANGUAGE

#define HDR_ACCEPT_LANGUAGE 28

Header definition.

Definition at line 144 of file httpparser.hpp.

◆ HDR_ACCEPT_RANGE

#define HDR_ACCEPT_RANGE 29

Header definition.

Definition at line 145 of file httpparser.hpp.

◆ HDR_CONTENT_ENCODING

#define HDR_CONTENT_ENCODING 30

Header definition.

Definition at line 146 of file httpparser.hpp.

◆ HDR_CONTENT_LANGUAGE

#define HDR_CONTENT_LANGUAGE 31

Header definition.

Definition at line 147 of file httpparser.hpp.

◆ HDR_CONTENT_LOCATION

#define HDR_CONTENT_LOCATION 32

Header definition.

Definition at line 148 of file httpparser.hpp.

◆ HDR_CONTENT_RANGE

#define HDR_CONTENT_RANGE 33

Header definition.

Definition at line 149 of file httpparser.hpp.

◆ HDR_IF_RANGE

#define HDR_IF_RANGE 34

Header definition.

Definition at line 150 of file httpparser.hpp.

◆ HDR_RANGE

#define HDR_RANGE 35

Header definition.

Definition at line 151 of file httpparser.hpp.

◆ HDR_TE

#define HDR_TE 36

Header definition.

Definition at line 152 of file httpparser.hpp.

Enumeration Type Documentation

◆ parser_pos_t

enum parser_pos_t

Type of a parser position.

Enumerator
POS_REQUEST_LINE	Position request line.
POS_RESPONSE_LINE	Position response line.
POS_HEADERS	Position headers.
POS_ENTITY	Position entity.
POS_COMPLETE	Position complete.

Definition at line 67 of file httpparser.hpp.

◆ http_method_t

enum http_method_t

Method in a HTTP request.

Definition at line 91 of file httpparser.hpp.

◆ parse_status_t

enum parse_status_t

Status of parsing.

Enumerator
PARSE_SUCCESS	msg was parsed successfully.
PARSE_INCOMPLETE	need more data to continue.
PARSE_INCOMPLETE_ENTITY	for responses that don't have length specified.
PARSE_FAILURE	parse failed; check status code for details.
PARSE_OK	done partial.
PARSE_NO_MATCH	token not matched.
PARSE_CONTINUE_1	private.

Definition at line 193 of file httpparser.hpp.

Function Documentation

◆ httpmsg_destroy()

void httpmsg_destroy ( http_message_t * msg )

Free memory allocated for the http message.

Parameters

[in,out] msg HTTP Message Object.

Definition at line 1273 of file httpparser.cpp.

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◆ httpmsg_find_hdr_str()

http_header_t * httpmsg_find_hdr_str	(	http_message_t *	msg,
		const char *	header_name
	)

Compares the header name with the header names stored in the linked list of messages.

Returns

Pointer to a header on success
nullptr on failure

Parameters

[in]	msg	HTTP Message Object.
[in]	header_name	Header name to be compared with.

Definition at line 1286 of file httpparser.cpp.

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◆ httpmsg_find_hdr()

http_header_t * httpmsg_find_hdr	(	http_message_t *	msg,
		int	header_name_id,
		memptr *	value
	)

Finds header from a list, with the given 'name_id'.

Returns

Pointer to a header on success
nullptr on failure

Parameters

[in]	msg	HTTP Message Object.
[in]	header_name_id	Header Name ID to be compared with.
[out]	value	Buffer to get the ouput to.

Definition at line 1307 of file httpparser.cpp.

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◆ parser_request_init()

void parser_request_init ( http_parser_t * parser )

Initializes parser object for a request.

Parameters

[out] parser HTTP Parser Object.

Definition at line 1679 of file httpparser.cpp.

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◆ parser_response_init()

void parser_response_init	(	http_parser_t *	parser,
		http_method_t	request_method
	)

Initializes parser object for a response.

Parameters

[out]	parser	HTTP Parser object.
[in]	request_method	Request method.

Definition at line 1686 of file httpparser.cpp.

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◆ parser_parse()

parse_status_t parser_parse ( http_parser_t * parser )

The parser function.

Depending on the position of the parser object the actual parsing function is invoked.

Returns

On success: PARSE_SUCCESS
On error:

PARSE_FAILURE
PARSE_INCOMPLETE
PARSE_INCOMPLETE_ENTITY
PARSE_NO_MATCH

Parameters

[in,out] parser HTTP Parser Object.

Definition at line 1695 of file httpparser.cpp.

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◆ parser_parse_responseline()

parse_status_t parser_parse_responseline ( http_parser_t * parser )

Get HTTP Method, URL location and version information.

Returns

PARSE_OK
PARSE_SUCCESS
PARSE_FAILURE

Todo:: Check what function description is the right one. There was another found.

Parameters

[in,out] parser HTTP Parser object.

Definition at line 1362 of file httpparser.cpp.

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◆ parser_parse_headers()

parse_status_t parser_parse_headers ( http_parser_t * parser )

Get HTTP Method, URL location and version information.

Returns

PARSE_OK
PARSE_SUCCESS
PARSE_FAILURE

Todo:: Check what function description is the right one. There was another found.

Parameters

[in,out] parser HTTP Parser object.

Definition at line 1429 of file httpparser.cpp.

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◆ parser_parse_entity()

parse_status_t parser_parse_entity ( http_parser_t * parser )

Determines method to read entity.

Returns

PARSE_OK
PARSE_FAILURE
PARSE_COMPLETE – no more reading to do

Todo:: Check what function description is the right one. There was another found.

Parameters

[in,out] parser HTTP Parser object.

Definition at line 1637 of file httpparser.cpp.

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◆ parser_get_entity_read_method()

parse_status_t parser_get_entity_read_method ( http_parser_t * parser )

Determines method to read entity.

Returns

On success: PARSE_CONTINUE_1
On error:

PARSE_FAILURE
PARSE_SUCCESS – no more reading to do

Parameters

[in,out] parser HTTP Parser object.

Definition at line 1552 of file httpparser.cpp.

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◆ parser_append()

parse_status_t parser_append	(	http_parser_t *	parser,
		const char *	buf,
		size_t	buf_length
	)

Append date to HTTP parser, and do the parsing.

Returns

On success: PARSE_SUCCESS
On error:

PARSE_FAILURE
PARSE_INCOMPLETE
PARSE_INCOMPLETE_ENTITY
PARSE_NO_MATCH

Parameters

[in,out]	parser	HTTP Parser object.
[in]	buf	buffer to be appended to the parser.
[in]	buf_length	Size of the buffer.

Definition at line 1736 of file httpparser.cpp.

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◆ matchstr()

parse_status_t matchstr	(	char *	str,
		size_t	slen,
		const char *	fmt,
			...
	)

Matches a variable parameter list with a string and takes actions based on the data type specified.

Returns

PARSE_OK
PARSE_NO_MATCH – failure to match pattern 'fmt'
PARSE_FAILURE – 'str' is bad input

Parameters

[in]	str	String to be matched.
[in]	slen	Length of the string.
[in]	fmt	Pattern format for arguments (like printf()).
[in]	...	Variable list of arguments (like printf()).

Definition at line 1328 of file httpparser.cpp.

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◆ raw_to_int()

int raw_to_int	(	memptr *	raw_value,
		int	base
	)

Converts raw character data to integer value.

Returns: integer

Parameters

[in]	raw_value	Buffer to be converted.
	base	Base to use for conversion.

Definition at line 1753 of file httpparser.cpp.

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◆ raw_find_str()

int raw_find_str	(	memptr *	raw_value,
		const char *	str
	)

Find a substring from raw character string buffer.

Side effects: raw_value is transformed to lowercase.

Returns: integer - index at which the substring is found.

Parameters

[in]	raw_value	Buffer containg the string.
[in]	str	Substring to be found.

Definition at line 1771 of file httpparser.cpp.

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◆ method_to_str()

const char * method_to_str ( http_method_t method )

A wrapper function that maps a method id to a method.

nameConverts a http_method id stored in the HTTP Method.

Returns: Pointer to the HTTP Method.

Parameters

[in] method HTTP method.

Definition at line 1801 of file httpparser.cpp.

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◆ print_http_headers()

void print_http_headers	(	std::string_view	log_msg,
		http_message_t *	hmsg
	)

Print the HTTP headers.

Function is mainly used for debugging.

Parameters

[in]	log_msg	log message number ("MSGxxxx").
[in]	hmsg	HTTP Message object.

Definition at line 1815 of file httpparser.cpp.

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Variable Documentation

◆ Http_Header_Names

constexpr std::array<const UPnPsdk::str_int_entry, 33> Http_Header_Names

inlineconstexpr

Assigns header-name id to its text representation.

Definition at line 157 of file httpparser.hpp.

UPnPsdk 0.1 Universal Plug and Play +, Software Development Kit

Classes

Macros

Enumerations

Functions

Variables

Detailed Description

Class Documentation

◆ scanner_t

◆ http_header_t

◆ http_message_t

◆ http_parser_t

Macro Definition Documentation

◆ ENTREAD_DETERMINE_READ_METHOD

◆ ENTREAD_USING_CLEN

◆ ENTREAD_USING_CHUNKED

◆ ENTREAD_UNTIL_CLOSE

◆ ENTREAD_CHUNKY_BODY

◆ ENTREAD_CHUNKY_HEADERS

◆ HDR_UNKNOWN

◆ HDR_CACHE_CONTROL

◆ HDR_CALLBACK

◆ HDR_CONTENT_LENGTH

◆ HDR_CONTENT_TYPE

◆ HDR_DATE

◆ HDR_EXT

◆ HDR_HOST

◆ HDR_LOCATION

◆ HDR_MAN

◆ HDR_MX

◆ HDR_NT

◆ HDR_NTS

◆ HDR_SERVER

◆ HDR_SEQ

◆ HDR_SID

◆ HDR_SOAPACTION

◆ HDR_ST

◆ HDR_TIMEOUT

◆ HDR_TRANSFER_ENCODING

◆ HDR_USN

◆ HDR_USER_AGENT

◆ HDR_ACCEPT

◆ HDR_ACCEPT_ENCODING

◆ HDR_ACCEPT_CHARSET

◆ HDR_ACCEPT_LANGUAGE

◆ HDR_ACCEPT_RANGE

◆ HDR_CONTENT_ENCODING

◆ HDR_CONTENT_LANGUAGE

◆ HDR_CONTENT_LOCATION

◆ HDR_CONTENT_RANGE

◆ HDR_IF_RANGE

◆ HDR_RANGE

◆ HDR_TE

Enumeration Type Documentation

◆ parser_pos_t

◆ http_method_t

◆ parse_status_t

Function Documentation

◆ httpmsg_destroy()

◆ httpmsg_find_hdr_str()

◆ httpmsg_find_hdr()

◆ parser_request_init()

◆ parser_response_init()

◆ parser_parse()

◆ parser_parse_responseline()

◆ parser_parse_headers()

◆ parser_parse_entity()

◆ parser_get_entity_read_method()

◆ parser_append()

◆ matchstr()

◆ raw_to_int()

◆ raw_find_str()

◆ method_to_str()

◆ print_http_headers()

Variable Documentation

◆ Http_Header_Names