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PACKET DESIGN DOES NOT WARRANT, GUARANTEE, .\" OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS .\" OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, .\" RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE .\" LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE .\" OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT, .\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL .\" DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF .\" USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF .\" LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF .\" THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF .\" THE POSSIBILITY OF SUCH DAMAGE. .\" .\" Author: Archie Cobbs .\" .\" $Id: structs_xmlrpc.3,v 1.1.1.1 2012/02/21 23:25:53 misho Exp $ .\" .Dd April 22, 2002 .Dt STRUCTS_XMLRPC 3 .Os .Sh NAME .Nm structs_xmlrpc .Nd structs support for XML-RPC .Sh LIBRARY PDEL Library (libpdel, \-lpdel) .Sh SYNOPSIS .In sys/types.h .In pdel/structs/structs.h .In pdel/structs/type/array.h .In pdel/structs/type/union.h .In pdel/structs/xmlrpc.h .Ft int .Fn structs_struct2xmlrpc "const struct structs_type *type" "const void *data" "const char *sname" "const struct structs_type *xtype" "void *xdata" "const char *xname" .Ft int .Fn structs_xmlrpc2struct "const struct structs_type *xtype" "const void *xdata" "const char *xname" "const struct structs_type *type" "void *data" "const char *sname" "char *ebuf" "size_t emax" .Ft "struct xmlrpc_request *" .Fn structs_xmlrpc_build_request "const char *mtype" "const char *methodName" "u_int nparams" "const struct structs_type **types" "const void **params" .Ft "struct xmlrpc_response_union *" .Fn structs_xmlrpc_build_response "const char *mtype" "const struct structs_type *type" "const void *data" .Ft "struct xmlrpc_response_union *" .Fn structs_xmlrpc_build_fault_response "const char *mtype" "const struct xmlrpc_compact_fault *fault" .Vt extern const struct structs_type structs_type_xmlrpc_value ; .Vt extern const struct structs_type structs_type_xmlrpc_array ; .Vt extern const struct structs_type structs_type_xmlrpc_member ; .Vt extern const struct structs_type structs_type_xmlrpc_struct ; .Vt extern const struct structs_type structs_type_xmlrpc_request ; .Vt extern const struct structs_type structs_type_xmlrpc_response ; .Vt extern const struct structs_type structs_type_xmlrpc_fault ; .Vt extern const struct structs_type structs_type_xmlrpc_compact_fault ; .Sh DESCRIPTION These functions and .Xr structs 3 types provide support for XML-RPC, i.e., conversion between XML-RPC values and native C data types. .\" .Ss Compact and Exploded Types .\" For any XML-RPC data structure, there are two .Xr structs 3 types that describe it: a .Dq compact type and an .Dq exploded type. Applications usually work with compact (or native C) types, i.e., where XML-RPC i32's are represented by C int32_t's, XML-RPC struct's are represented by C structures, and so on. In order to convert between native data structures and XML-RPC, intermediate .Dq exploded types are used. This man page describes .Xr structs 3 types for the exploded XML-RPC data structures and functions to convert between the compact and exploded forms. .Pp That is, XML-RPC is just a special case of .Xr structs 3 types converted into XML with lots of extra nesting so that a fixed set of XML tags may be used. The exploded types are simply the .Xr structs 3 types that include the extra nesting so that when they are converted to XML in the normal fashion (see .Xr structs_xml_output 3) , the result is a well-formed XML-RPC request or response. .Pp The following types data structures are defined in the header file .Li "" : .Pp .Fa structs_type_xmlrpc_value is a .Xr structs 3 type representing an exploded XML-RPC value, i.e., a .Li "struct xmlrpc_value_union" . .Pp .Fa structs_type_xmlrpc_array is a .Xr structs 3 type representing an exploded XML-RPC array, i.e., a .Li "struct xmlrpc_array" . .Pp .Fa structs_type_xmlrpc_member is a .Xr structs 3 type representing an exploded XML-RPC structure member, i.e., a .Li "struct xmlrpc_member" . .Pp .Fa structs_type_xmlrpc_struct is a .Xr structs 3 type representing an exploded XML-RPC structure, i.e., a .Li "struct xmlrpc_struct" . .Pp .Fa structs_type_xmlrpc_request is a .Xr structs 3 type representing an exploded XML-RPC request, i.e., a .Li "struct xmlrpc_request" . .Pp .Fa structs_type_xmlrpc_response is a .Xr structs 3 type representing an exploded XML-RPC response, i.e., a .Li "struct xmlrpc_response_union" . .Pp .Fa structs_type_xmlrpc_fault is a .Xr structs 3 type representing an exploded XML-RPC fault, i.e., a .Li "struct xmlrpc_fault" . .Pp .Fa structs_type_xmlrpc_compact_fault is a .Xr structs 3 type representing an XML-RPC fault in a compact form, i.e., a .Li "struct xmlrpc_compact_fault" : .Bd -literal -offset 3n struct xmlrpc_compact_fault { int32_t faultCode; /* XML-RPC fault code */ char *faultString; /* XML-RPC fault string */ }; .Ed .\" .Ss Conversion Routines .\" .Fn structs_struct2xmlrpc converts an arbitrary compact .Xr structs 3 instance into an .Dq exploded XML-RPC value. The original instance should be pointed to by .Fa data and have .Xr structs 3 type .Fa type , while the XML-RPC instance should be pointed to by .Fa xdata and have .Xr structs 3 type .Fa xtype . .Fa sname and .Fa xname may be non- .Dv NULL to name specific sub-fields of .Fa data and .Fa xdata , respectively, to convert. The .Fa xdata instance must already be initialized, and the sub-field of .Fa xdata specified by .Fa xname must have type .Fa structs_type_xmlrpc_value , i.e., it must be a .Li "struct xmlrpc_value_union" . .Pp The following primitive .Xr structs 3 types are specially recognized by .Fn structs_struct2xmlrpc : .Bl -tag -width "xxxxx" -offset indent .It Xo .Va structs_type_int32 , and .Va structs_type_int when .Li "sizeof(int) == 4" .Xc Converted to . .It Xo .Va structs_type_boolean and all variants .Xc Converted to . .It Va structs_type_float Converted to . .It Va structs_type_double Converted to . .It Va structs_type_time_iso8601 Converted to . .It Xo .Va structs_type_data or any variant using the default character set .Xc Converted to . .It Xo Variable and fixed length array types .Xc Converted to . .It Xo Structure types .Xc Converted to . .It Xo Union types .Xc Converted to . .El .Pp All other primitive types are converted to XML-RPC 's. .Pp .Fn structs_xmlrpc2struct converts an XML-RPC value back into a .Dq compact data structure, essentially the reverse of .Fn structs_struct2xmlrpc . As before, .Fa xname , .Fa xdata , and .Fa xtype describe the XML-RPC value and .Fa sname , .Fa data , and .Fa type describe the normal, native instance. The .Fa data instance must already be initialized. The sub-field of .Fa xdata specified by .Fa xname must have type .Fa structs_type_xmlrpc_value , i.e., it must be a .Li "struct xmlrpc_value_union" . In addition, an error buffer pointed to by .Fa ebuf having size .Fa emax may be provided; if so, any errors from the decoding will be written into it. .Pp Scalar XML-RPC values are converted into primitive types by simply calling .Xr structs_set_string 3 . There is no checking that the XML-RPC tag is consistent with the primitive structs type; i.e., if the primitive type successfully parses the string, then it's assumed to be OK. .Pp Array XML-RPC values are converted into array types. Structure XML-RPC values are converted into structure types or union types, depending on the destination type provided. In the union case, the last field specified in the XML-RPC structure is chosen for the union. Other fields specified must be valid for the union, but are otherwise ignored. .\" .Ss XML-RPC Requests and Responses .\" .Fn structs_xmlrpc_build_request creates an XML-RPC request instance from native, .Dq compact parameter data structures. .Fa methodName is the XML-RPC request method name. There will be .Fa nparams parameters in the request; .Fa types must point to an array of .Fa nparams .Xr structs 3 parameter types and .Fa params an array of .Fa nparams parameter values having the corresponding types. .Pp To build the request directly out of .Dq exploded XML-RPC parameter values, set .Fa types to .Dv NULL . Then it will be assumed that each parameter in the .Fa params array is an instance of .Fa structs_type_xmlrpc_value , i.e., a .Li "struct xmlrpc_value_union" . .Pp If successful, .Fn structs_xmlrpc_build_request returns an instance of type .Fa structs_type_xmlrpc_request , i.e., a .Li "struct xmlrpc_request" , in a memory block allocated with .Xr typed_mem type .Fa mtype , which the caller is responsible for unintializing and freeing. .Pp .Fn structs_xmlrpc_build_response creates an XML-RPC response. The response data structure (i.e., the XML-RPC return value) pointed to by .Fa data should be .Dq compact and have .Xr structs 3 type .Fa type . .Pp To directly send an .Dq exploded XML-RPC return value, set .Fa type to .Dv NULL . Then it will be assumed that .Fa data points to an instance of .Fa structs_type_xmlrpc_value , i.e., a .Li "struct xmlrpc_value_union" . .Pp If successful, .Fn structs_xmlrpc_build_response returns an instance of type .Fa structs_type_xmlrpc_response , i.e., a .Li "struct xmlrpc_response_union" , in a memory block allocated with .Xr typed_mem type .Fa mtype , which the caller is responsible for unintializing and freeing. .Pp .Fn structs_xmlrpc_build_fault_response builds an XML-RPC fault response. If successful, it returns an instance of .Fa structs_type_xmlrpc_response , i.e., a .Li "struct xmlrpc_response_union" , in a memory block allocated with .Xr typed_mem type .Fa mtype , which the caller is responsible for unintializing and freeing. .Sh RETURN VALUES The above functions indicate an error by returning either -1 or .Dv NULL and setting .Va errno to an appropriate value. .Sh SEE ALSO .Xr http_servlet_xmlrpc 3 , .Xr http_xml 3 , .Xr libpdel 3 , .Xr structs 3 , .Xr structs_type 3 , .Xr structs_xml_input 3 , .Xr typed_mem 3 .Rs .%T "XML-RPC Home Page" .%O "http://www.xmlrpc.org/" .Re .Sh HISTORY The PDEL library was developed at Packet Design, LLC. .Dv "http://www.packetdesign.com/" .Sh AUTHORS .An Archie Cobbs Aq archie@freebsd.org