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add another convenience function to libtalermhd

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This commit is contained in:
Christian Grothoff 2019-11-24 17:15:01 +01:00
parent 481223e2eb
commit 287a8dec9b
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GPG Key ID: 939E6BE1E29FC3CC
4 changed files with 253 additions and 0 deletions
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1
src/include/taler_error_codes.h
View File

@ -1442,6 +1442,7 @@ enum TALER_ErrorCode
* The amount to be refunded is inconsistent: either is lower than
* the previous amount being awarded, or it is too big to be paid back.
* In this second case, the fault stays on the business dept. side.
* Returned with an HTTP status of #MHD_HTTP_CONFLICT.
*/
TALER_EC_REFUND_INCONSISTENT_AMOUNT = 2602,

52
src/include/taler_mhd_lib.h
View File

@ -143,6 +143,40 @@ TALER_MHD_reply_with_error (struct MHD_Connection *connection,
const char *hint);
/**
* Make JSON response object.
*
* @param json the json object
* @return MHD response object
*/
struct MHD_Response *
TALER_MHD_make_json (const json_t *json);
/**
* Make JSON response object.
*
* @param fmt format string for pack
* @param ... varargs
* @return MHD response object
*/
struct MHD_Response *
TALER_MHD_make_json_pack (const char *fmt,
...);
/**
* Create a response indicating an internal error.
*
* @param ec error code to return
* @param hint hint about the internal error's nature
* @return a MHD response object
*/
struct MHD_Response *
TALER_MHD_make_error (enum TALER_ErrorCode ec,
const char *hint);
/**
* Send a response indicating that the request was too big.
*
@ -338,4 +372,22 @@ TALER_MHD_open_unix_path (const char *unix_path,
mode_t unix_mode);
/**
* Bind a listen socket to the UNIX domain path
* or the TCP port and IP address as specified
* in @a cfg in section @a section. IF only a
* port was specified, set @a port and return -1.
* Otherwise, return the bound file descriptor.
*
* @param cfg configuration to parse
* @param section configuration section to use
* @param port[out] port to set, if TCP without BINDTO
* @return -1 and a port of zero on error, otherwise
* either -1 and a port, or a bound stream socket
*/
int
TALER_MHD_bind (const struct GNUNET_CONFIGURATION_Handle *cfg,
const char *section,
uint16_t *port);
#endif

109
src/mhd/mhd_config.c
View File

@ -285,3 +285,112 @@ TALER_MHD_open_unix_path (const char *unix_path,
GNUNET_NETWORK_socket_free_memory_only_ (nh);
return fd;
}
/**
* Bind a listen socket to the UNIX domain path
* or the TCP port and IP address as specified
* in @a cfg in section @a section. IF only a
* port was specified, set @a port and return -1.
* Otherwise, return the bound file descriptor.
*
* @param cfg configuration to parse
* @param section configuration section to use
* @param port[out] port to set, if TCP without BINDTO
* @return -1 and a port of zero on error, otherwise
* either -1 and a port, or a bound stream socket
*/
int
TALER_MHD_bind (const struct GNUNET_CONFIGURATION_Handle *cfg,
const char *section,
uint16_t *port)
{
char *bind_to;
char *serve_unixpath;
mode_t unixpath_mode;
int fh;
char port_str[6];
struct addrinfo hints;
struct addrinfo *res;
int ec;
struct GNUNET_NETWORK_Handle *nh;
*port = 0;
if (GNUNET_OK !=
TALER_MHD_parse_config (cfg,
section,
port,
&serve_unixpath,
&unixpath_mode))
return -1;
if (NULL != serve_unixpath)
return TALER_MHD_open_unix_path (serve_unixpath,
unixpath_mode);
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (cfg,
section,
"BIND_TO",
&bind_to))
return -1; /* only set port */
/* let's have fun binding... */
GNUNET_snprintf (port_str,
sizeof (port_str),
"%u",
(unsigned int) *port);
*port = 0; /* do NOT return port in case of errors */
memset (&hints, 0, sizeof (hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE
#ifdef AI_IDN
| AI_IDN
#endif
;
if (0 !=
(ec = getaddrinfo (bind_to,
port_str,
&hints,
&res)))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to resolve BIND_TO address `%s': %s\n",
bind_to, gai_strerror (ec));
GNUNET_free (bind_to);
return -1;
}
GNUNET_free (bind_to);
if (NULL == (nh = GNUNET_NETWORK_socket_create (res->ai_family,
res->ai_socktype,
res->ai_protocol)))
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
"socket");
freeaddrinfo (res);
return -1;
}
if (GNUNET_OK !=
GNUNET_NETWORK_socket_bind (nh,
res->ai_addr,
res->ai_addrlen))
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
"bind");
freeaddrinfo (res);
return -1;
}
freeaddrinfo (res);
if (GNUNET_OK !=
GNUNET_NETWORK_socket_listen (nh,
UNIX_BACKLOG))
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
"listen");
GNUNET_SCHEDULER_shutdown ();
return -1;
}
fh = GNUNET_NETWORK_get_fd (nh);
GNUNET_NETWORK_socket_free_memory_only_ (nh);
return fh;
}

91
src/mhd/mhd_responses.c
View File

@ -151,6 +151,43 @@ TALER_MHD_body_compress (void **buf,
}
/**
* Make JSON response object.
*
* @param json the json object
* @return MHD response object
*/
struct MHD_Response *
TALER_MHD_make_json (const json_t *json)
{
struct MHD_Response *resp;
char *json_str;
json_str = json_dumps (json,
JSON_INDENT (2));
if (NULL == json_str)
{
GNUNET_break (0);
return NULL;
}
resp = MHD_create_response_from_buffer (strlen (json_str),
json_str,
MHD_RESPMEM_MUST_FREE);
if (NULL == resp)
{
free (json_str);
GNUNET_break (0);
return NULL;
}
TALER_MHD_add_global_headers (resp);
GNUNET_break (MHD_YES ==
MHD_add_response_header (resp,
MHD_HTTP_HEADER_CONTENT_TYPE,
"application/json"));
return resp;
}
/**
* Send JSON object as response.
*
@ -267,6 +304,60 @@ TALER_MHD_reply_json_pack (struct MHD_Connection *connection,
}
/**
* Make JSON response object.
*
* @param fmt format string for pack
* @param ... varargs
* @return MHD response object
*/
struct MHD_Response *
TALER_MHD_make_json_pack (const char *fmt,
...)
{
json_t *json;
va_list argp;
struct MHD_Response *ret;
json_error_t jerror;
va_start (argp, fmt);
json = json_vpack_ex (&jerror,
0,
fmt,
argp);
va_end (argp);
if (NULL == json)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to pack JSON with format `%s': %s\n",
fmt,
jerror.text);
GNUNET_break (0);
return MHD_NO;
}
ret = TALER_MHD_make_json (json);
json_decref (json);
return ret;
}
/**
* Create a response indicating an internal error.
*
* @param ec error code to return
* @param hint hint about the internal error's nature
* @return a MHD response object
*/
struct MHD_Response *
TALER_MHD_make_error (enum TALER_ErrorCode ec,
const char *hint)
{
return TALER_MHD_make_json_pack ("{s:I, s:s}",
"code", (json_int_t) ec,
"hint", hint);
}
/**
* Send a response indicating an error.
*