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http.h

/***************************************************************************
 * http.h                                                                  *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
 *                                                                         *
 * The Nmap Security Scanner is (C) 1996-2009 Insecure.Com LLC. Nmap is    *
 * also a registered trademark of Insecure.Com LLC.  This program is free  *
 * software; you may redistribute and/or modify it under the terms of the  *
 * GNU General Public License as published by the Free Software            *
 * Foundation; Version 2 with the clarifications and exceptions described  *
 * below.  This guarantees your right to use, modify, and redistribute     *
 * this software under certain conditions.  If you wish to embed Nmap      *
 * technology into proprietary software, we sell alternative licenses      *
 * (contact sales@insecure.com).  Dozens of software vendors already       *
 * license Nmap technology such as host discovery, port scanning, OS       *
 * detection, and version detection.                                       *
 *                                                                         *
 * Note that the GPL places important restrictions on "derived works", yet *
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 * "derivative work" for the purpose of this license if it does any of the *
 * following:                                                              *
 * o Integrates source code from Nmap                                      *
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 *   nmap-os-db or nmap-service-probes.                                    *
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 *   not derivative works.)                                                * 
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 * OpenSSL library which is distributed under a license identical to that  *
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 *                                                                         *
 * Source is provided to this software because we believe users have a     *
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 * included with Nmap.                                                     *
 *                                                                         *
 ***************************************************************************/

/* $Id$ */

#ifndef _HTTP_H
#define _HTTP_H

#include <stdio.h>
#include <stdlib.h>

/* This is an abstraction over a socket that provides rudimentary buffering. It
   is useful for the line-oriented parts of HTTP. */
struct socket_buffer {
    int sd;
    char buffer[BUFSIZ];
    char *p;
    char *end;
};

void socket_buffer_init(struct socket_buffer *buf, int sd);

int socket_buffer_read(struct socket_buffer *buf, char *out, size_t size);

char *socket_buffer_readline(struct socket_buffer *buf, size_t *n, size_t maxlen);

int socket_buffer_readcount(struct socket_buffer *buf, char *out, size_t size);

char *socket_buffer_remainder(struct socket_buffer *buf, size_t *len);

/* A broken-down URI as defined in RFC 3986, except that the query and fragment
   parts are included in the path. */
struct uri {
    char *scheme;
    char *host;
    int port;
    char *path;
};

void uri_init(struct uri *uri);

void uri_free(struct uri *uri);

struct uri *uri_parse(struct uri *uri, const char *uri_s);

struct uri *uri_parse_authority(struct uri *uri, const char *authority);

enum http_version {
    HTTP_09,
    HTTP_10,
    HTTP_11,
    HTTP_UNKNOWN,
};

struct http_header {
    char *name;
    char *value;
    struct http_header *next;
};

struct http_request {
    char *method;
    struct uri uri;
    enum http_version version;
    struct http_header *header;
    unsigned long content_length;
    unsigned long bytes_transferred;
};

struct http_response {
    enum http_version version;
    int code;
    char *phrase;
    struct http_header *header;
    unsigned long content_length;
    unsigned long bytes_transferred;
};

void http_header_free(struct http_header *header);
char *http_header_get(const struct http_header *header, const char *name);
char *http_header_get_first(const struct http_header *header, const char *name);
struct http_header *http_header_set(struct http_header *header, const char *name, const char *value);
struct http_header *http_header_remove(struct http_header *header, const char *name);
int http_header_remove_hop_by_hop(struct http_header **header);
char *http_header_to_string(const struct http_header *header, size_t *n);

void http_request_init(struct http_request *request);
void http_request_free(struct http_request *request);
char *http_request_to_string(const struct http_request *request, size_t *n);

void http_response_init(struct http_response *response);
void http_response_free(struct http_response *response);
char *http_response_to_string(const struct http_response *response, size_t *n);

int http_read_header(struct socket_buffer *buf, char **result);
int http_parse_header(struct http_header **result, const char *header);
int http_request_parse_header(struct http_request *request, const char *header);
int http_response_parse_header(struct http_response *response, const char *header);

int http_read_request_line(struct socket_buffer *buf, char **line);
int http_parse_request_line(const char *line, struct http_request *request);

int http_read_status_line(struct socket_buffer *buf, char **line);
int http_parse_status_line(const char *line, struct http_response *response);
int http_parse_status_line_code(const char *line);

int http_check_auth_basic(const char *userpass, const char *value);

#endif

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