common/http.h

   1 /* http.h  -  HTTP protocol handler
   2  * Copyright (C) 1999, 2000, 2001, 2003,
   3  *               2006 Free Software Foundation, Inc.
   4  *
   5  * This file is part of GnuPG.
   6  *
   7  * GnuPG is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * GnuPG is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20 #ifndef GNUPG_COMMON_HTTP_H
  21 #define GNUPG_COMMON_HTTP_H
  22
  23 #include <gpg-error.h>
  24 #ifdef HTTP_USE_ESTREAM
  25 #include "estream.h"
  26 #endif
  27
  28 struct uri_tuple_s {
  29   struct uri_tuple_s *next;
  30   const char *name;     /* A pointer into name. */
  31   char  *value;         /* A pointer to value (a Nul is always appended). */
  32   size_t valuelen;      /* The real length of the value; we need it
  33                            because the value may contain embedded Nuls. */
  34   int no_value;         /* True if no value has been given in the URL. */
  35 };
  36 typedef struct uri_tuple_s *uri_tuple_t;
  37
  38 struct parsed_uri_s
  39 {
  40   /* All these pointers point into BUFFER; most stuff is not escaped. */
  41   char *scheme;         /* Pointer to the scheme string (lowercase). */
  42   int use_tls;          /* Whether TLS should be used. */
  43   char *auth;           /* username/password for basic auth */
  44   char *host;           /* Host (converted to lowercase). */
  45   unsigned short port;  /* Port (always set if the host is set). */
  46   char *path;           /* Path. */
  47   uri_tuple_t params;   /* ";xxxxx" */
  48   uri_tuple_t query;    /* "?xxx=yyy" */
  49   char buffer[1];       /* Buffer which holds a (modified) copy of the URI. */
  50 };
  51 typedef struct parsed_uri_s *parsed_uri_t;
  52
  53 typedef enum
  54   {
  55     HTTP_REQ_GET  = 1,
  56     HTTP_REQ_HEAD = 2,
  57     HTTP_REQ_POST = 3
  58   }
  59 http_req_t;
  60
  61 /* We put the flag values into an enum, so that gdb can display them. */
  62 enum
  63   {
  64     HTTP_FLAG_TRY_PROXY = 1,
  65     HTTP_FLAG_NO_SHUTDOWN = 2,
  66     HTTP_FLAG_TRY_SRV = 4,
  67     HTTP_FLAG_LOG_RESP = 8,
  68     HTTP_FLAG_NEED_HEADER = 16
  69   };
  70
  71 struct http_context_s;
  72 typedef struct http_context_s *http_t;
  73
  74 void http_register_tls_callback (gpg_error_t (*cb) (http_t, void *, int));
  75
  76 gpg_error_t http_parse_uri (parsed_uri_t *ret_uri, const char *uri);
  77
  78 void http_release_parsed_uri (parsed_uri_t uri);
  79
  80 gpg_error_t http_open (http_t *r_hd, http_req_t reqtype,
  81                        const char *url,
  82                        const char *auth,
  83                        unsigned int flags,
  84                        const char *proxy,
  85                        void *tls_context);
  86
  87 void http_start_data (http_t hd);
  88
  89 gpg_error_t http_wait_response (http_t hd);
  90
  91 void http_close (http_t hd, int keep_read_stream);
  92
  93 gpg_error_t http_open_document (http_t *r_hd,
  94                                 const char *document,
  95                                 const char *auth,
  96                                 unsigned int flags,
  97                                 const char *proxy,
  98                                 void *tls_context);
  99
 100 #ifdef HTTP_USE_ESTREAM
 101 estream_t http_get_read_ptr (http_t hd);
 102 estream_t http_get_write_ptr (http_t hd);
 103 #else /*!HTTP_USE_ESTREAM*/
 104 FILE *http_get_read_ptr (http_t hd);
 105 FILE *http_get_write_ptr (http_t hd);
 106 #endif /*!HTTP_USE_ESTREAM*/
 107 unsigned int http_get_status_code (http_t hd);
 108 const char *http_get_header (http_t hd, const char *name);
 109
 110 char *http_escape_string (const char *string, const char *specials);
 111
 112
 113 #endif /*GNUPG_COMMON_HTTP_H*/