1 /* $Id: http.h,v 1.8 2019/06/07 08:07:52 florian Exp $ */ 2 /* 3 * Copyright (c) 2016 Kristaps Dzonsons <kristaps@bsd.lv> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 #ifndef HTTP_H 18 #define HTTP_H 19 20 struct source { 21 int family; /* 4 (PF_INET) or 6 (PF_INET6) */ 22 char *ip; /* IPV4 or IPV6 address */ 23 }; 24 25 struct http; 26 27 /* 28 * Write and read callbacks to allow HTTP and HTTPS. 29 * Both of these return the number of bytes read (or written) or -1 on 30 * failure. 31 * 0 bytes read means that the connection has closed. 32 */ 33 typedef ssize_t (*writefp)(const void *, size_t, const struct http *); 34 typedef ssize_t (*readfp)(char *, size_t, const struct http *); 35 36 /* 37 * HTTP/S header pair. 38 * There's also a cooked-up pair, "Status", with the status code. 39 * Both strings are NUL-terminated. 40 */ 41 struct httphead { 42 const char *key; 43 const char *val; 44 }; 45 46 /* 47 * Grab all information from a transfer. 48 * DO NOT free any parts of this, and editing the parts (e.g., changing 49 * the underlying strings) will persist; so in short, don't. 50 * All of these values will be set upon http_get() success. 51 */ 52 struct httpget { 53 struct httpxfer *xfer; /* underlying transfer */ 54 struct http *http; /* underlying connection */ 55 int code; /* return code */ 56 struct httphead *head; /* headers */ 57 size_t headsz; /* number of headers */ 58 char *headpart; /* header buffer */ 59 size_t headpartsz; /* size of headpart */ 60 char *bodypart; /* body buffer */ 61 size_t bodypartsz; /* size of bodypart */ 62 }; 63 64 int http_init(void); 65 66 /* Convenience functions. */ 67 struct httpget *http_get(const struct source *, size_t, 68 const char *, short, const char *, int, 69 const void *, size_t); 70 void http_get_free(struct httpget *); 71 72 /* Allocation and release. */ 73 struct http *http_alloc(const struct source *, size_t, 74 const char *, short, const char *); 75 void http_free(struct http *); 76 struct httpxfer *http_open(const struct http *, int, const void *, size_t); 77 void http_close(struct httpxfer *); 78 void http_disconnect(struct http *); 79 80 /* Access. */ 81 char *http_head_read(const struct http *, 82 struct httpxfer *, size_t *); 83 struct httphead *http_head_parse(const struct http *, 84 struct httpxfer *, size_t *); 85 char *http_body_read(const struct http *, 86 struct httpxfer *, size_t *); 87 int http_head_status(const struct http *, 88 struct httphead *, size_t); 89 struct httphead *http_head_get(const char *, 90 struct httphead *, size_t); 91 92 #endif /* HTTP_H */ 93