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authorChristian Grothoff <christian@grothoff.org>2019-11-24 17:15:01 +0100
committerChristian Grothoff <christian@grothoff.org>2019-11-24 17:15:01 +0100
commit287a8dec9b3d6d2ee77a55fec4afff45f2cb826d (patch)
treedd19753c7e7440c9aa0ee2986dfa0d725f464ac4
parent481223e2eb9d1311b245fc35ad487cffbbb4de8f (diff)
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add another convenience function to libtalermhd
-rw-r--r--src/include/taler_error_codes.h1
-rw-r--r--src/include/taler_mhd_lib.h52
-rw-r--r--src/mhd/mhd_config.c109
-rw-r--r--src/mhd/mhd_responses.c91
4 files changed, 253 insertions, 0 deletions
diff --git a/src/include/taler_error_codes.h b/src/include/taler_error_codes.h
index 871ec2bf..55cdbacb 100644
--- a/src/include/taler_error_codes.h
+++ b/src/include/taler_error_codes.h
@@ -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,
diff --git a/src/include/taler_mhd_lib.h b/src/include/taler_mhd_lib.h
index 17783f1c..cdbc8d29 100644
--- a/src/include/taler_mhd_lib.h
+++ b/src/include/taler_mhd_lib.h
@@ -144,6 +144,40 @@ TALER_MHD_reply_with_error (struct MHD_Connection *connection,
/**
+ * 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.
*
* @param connection the MHD connection to use
@@ -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
diff --git a/src/mhd/mhd_config.c b/src/mhd/mhd_config.c
index afaceae4..d4b0e979 100644
--- a/src/mhd/mhd_config.c
+++ b/src/mhd/mhd_config.c
@@ -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;
+}
diff --git a/src/mhd/mhd_responses.c b/src/mhd/mhd_responses.c
index e1609d99..3642e7d5 100644
--- a/src/mhd/mhd_responses.c
+++ b/src/mhd/mhd_responses.c
@@ -152,6 +152,43 @@ 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.
*
* @param connection the MHD connection
@@ -268,6 +305,60 @@ 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.
*
* @param connection the MHD connection to use