zutil/soap.c

   1 /*
   2  * Copyright (c) 2002-2003, Index Data.
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: soap.c,v 1.4 2003-02-17 22:35:48 adam Exp $
   6  */
   7
   8 #include <yaz/soap.h>
   9
  10 #if HAVE_XML2
  11 #include <libxml/parser.h>
  12 #include <libxml/tree.h>
  13
  14 static const char *soap_v1_1 = "http://schemas.xmlsoap.org/soap/envelope/";
  15 static const char *soap_v1_2 = "http://www.w3.org/2001/06/soap-envelope";
  16
  17 int z_soap_error(ODR o, Z_SOAP *p,
  18                  const char *fault_code, const char *fault_string,
  19                  const char *details)
  20 {
  21     p->which = Z_SOAP_error;
  22     p->u.soap_error = (Z_SOAP_Fault *)
  23         odr_malloc(o, sizeof(*p->u.soap_error));
  24     p->u.soap_error->fault_code = odr_strdup(o, fault_code);
  25     p->u.soap_error->fault_string = odr_strdup(o, fault_string);
  26     if (details)
  27         p->u.soap_error->details = odr_strdup(o, details);
  28     else
  29         p->u.soap_error->details = 0;
  30     return -1;
  31 }
  32
  33 int z_soap_codec(ODR o, Z_SOAP **pp,
  34                  char **content_buf, int *content_len,
  35                  Z_SOAP_Handler *handlers)
  36 {
  37     if (o->direction == ODR_DECODE)
  38     {
  39         Z_SOAP *p;
  40         xmlNodePtr ptr, pptr;
  41         xmlDocPtr doc;
  42         int i, ret;
  43
  44         if (!content_buf || !*content_buf || !content_len)
  45             return -1;
  46
  47         *pp = p = (Z_SOAP *) odr_malloc(o, sizeof(*p));
  48         p->ns = soap_v1_1;
  49
  50         doc = xmlParseMemory(*content_buf, *content_len);
  51         if (!doc)
  52             return z_soap_error(o, p, "SOAP-ENV:Client",
  53                                 "Bad XML Document", 0);
  54         /* check that root node is Envelope */
  55         ptr = xmlDocGetRootElement(doc);
  56         if (!ptr || ptr->type != XML_ELEMENT_NODE ||
  57             strcmp(ptr->name, "Envelope") || !ptr->ns)
  58         {
  59             xmlFreeDoc(doc);
  60             return z_soap_error(o, p, "SOAP-ENV:Client",
  61                                 "No Envelope element", 0);
  62         }
  63         else
  64         {
  65             /* determine SOAP version */
  66             const char * ns_envelope = ptr->ns->href;
  67             if (!strcmp(ns_envelope, soap_v1_1))
  68                 p->ns = soap_v1_1;
  69             else if (!strcmp(ns_envelope, soap_v1_2))
  70                 p->ns = soap_v1_2;
  71             else
  72             {
  73                 xmlFreeDoc(doc);
  74                 return z_soap_error(o, p, "SOAP-ENV:Client",
  75                                     "Bad SOAP version", 0);
  76             }
  77         }
  78         ptr = ptr->children;
  79         while(ptr && ptr->type == XML_TEXT_NODE)
  80             ptr = ptr->next;
  81         if (ptr && ptr->type == XML_ELEMENT_NODE &&
  82             !strcmp(ptr->ns->href, p->ns) &&
  83             !strcmp(ptr->name, "Header"))
  84         {
  85             ptr = ptr->next;
  86             while(ptr && ptr->type == XML_TEXT_NODE)
  87                 ptr = ptr->next;
  88         }
  89         /* check that Body is present */
  90         if (!ptr || ptr->type != XML_ELEMENT_NODE ||
  91             strcmp(ptr->name, "Body"))
  92         {
  93             xmlFreeDoc(doc);
  94             return z_soap_error(o, p, "SOAP-ENV:Client",
  95                                 "SOAP Body element not found", 0);
  96         }
  97         if (strcmp(ptr->ns->href, p->ns))
  98         {
  99             xmlFreeDoc(doc);
 100             return z_soap_error(o, p, "SOAP-ENV:Client",
 101                                 "SOAP bad NS for Body element", 0);
 102         }
 103         pptr = ptr;
 104         ptr = ptr->children;
 105         while (ptr && ptr->type == XML_TEXT_NODE)
 106             ptr = ptr->next;
 107         if (!ptr || ptr->type != XML_ELEMENT_NODE)
 108         {
 109             xmlFreeDoc(doc);
 110             return z_soap_error(o, p, "SOAP-ENV:Client",
 111                                 "SOAP No content for Body", 0);
 112         }
 113         /* check for fault package */
 114         if (!strcmp(ptr->ns->href, p->ns)
 115             && !strcmp(ptr->name, "Fault") && ptr->children)
 116         {
 117             ptr = ptr->children;
 118
 119             p->which = Z_SOAP_fault;
 120             p->u.fault = odr_malloc(o, sizeof(*p->u.fault));
 121             p->u.fault->fault_code = 0;
 122             p->u.fault->fault_string = 0;
 123             p->u.fault->details = 0;
 124             while (ptr)
 125             {
 126                 if (ptr->children && ptr->children->type == XML_TEXT_NODE)
 127                 {
 128                     if (!strcmp(ptr->name, "faultcode"))
 129                         p->u.fault->fault_code =
 130                             odr_strdup(o, ptr->children->content);
 131                     if (!strcmp(ptr->name, "faultstring"))
 132                         p->u.fault->fault_string =
 133                             odr_strdup(o, ptr->children->content);
 134                     if (!strcmp(ptr->name, "details"))
 135                         p->u.fault->details =
 136                             odr_strdup(o, ptr->children->content);
 137                 }
 138                 ptr = ptr->next;
 139             }
 140             ret = 0;
 141         }
 142         else
 143         {
 144             for (i = 0; handlers[i].ns; i++)
 145                 if (!strcmp(ptr->ns->href, handlers[i].ns))
 146                     break;
 147             if (handlers[i].ns)
 148             {
 149                 void *handler_data = 0;
 150                 ret = (*handlers[i].f)(o, pptr, &handler_data,
 151                                        handlers[i].client_data,
 152                                        handlers[i].ns);
 153                 if (ret || !handler_data)
 154                     z_soap_error(o, p, "SOAP-ENV:Client",
 155                                  "SOAP Handler returned error", 0);
 156                 else
 157                 {
 158                     p->which = Z_SOAP_generic;
 159                     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
 160                     p->u.generic->no = i;
 161                     p->u.generic->ns = handlers[i].ns;
 162                     p->u.generic->p = handler_data;
 163                 }
 164             }
 165             else
 166             {
 167                 ret = z_soap_error(o, p, "SOAP-ENV:Client",
 168                                    "No handler for NS", 0);
 169             }
 170         }
 171         xmlFreeDoc(doc);
 172         return ret;
 173     }
 174     else if (o->direction == ODR_ENCODE)
 175     {
 176         Z_SOAP *p = *pp;
 177         xmlNsPtr ns_env;
 178         xmlNodePtr envelope_ptr, body_ptr;
 179         xmlChar *buf_out;
 180         int len_out;
 181
 182         xmlDocPtr doc = xmlNewDoc("1.0");
 183
 184         envelope_ptr = xmlNewNode(0, "Envelope");
 185         ns_env = xmlNewNs(envelope_ptr, p->ns, "SOAP-ENV");
 186         xmlSetNs(envelope_ptr, ns_env);
 187
 188         body_ptr = xmlNewChild(envelope_ptr, ns_env, "Body", 0);
 189         xmlDocSetRootElement(doc, envelope_ptr);
 190
 191         if (p->which == Z_SOAP_fault || p->which == Z_SOAP_error)
 192         {
 193             Z_SOAP_Fault *f = p->u.fault;
 194             xmlNodePtr fault_ptr = xmlNewChild(body_ptr, ns_env, "Fault", 0);
 195             xmlNewChild(fault_ptr, ns_env, "faultcode",  f->fault_code);
 196             xmlNewChild(fault_ptr, ns_env, "faultstring", f->fault_string);
 197             if (f->details)
 198                 xmlNewChild(fault_ptr, ns_env, "details", f->details);
 199         }
 200         else if (p->which == Z_SOAP_generic)
 201         {
 202             int ret, no = p->u.generic->no;
 203
 204             ret = (*handlers[no].f)(o, body_ptr, &p->u.generic->p,
 205                                     handlers[no].client_data,
 206                                     handlers[no].ns);
 207             if (ret)
 208                 return ret;
 209         }
 210         xmlDocDumpMemory(doc, &buf_out, &len_out);
 211         *content_buf = (char *) odr_malloc(o, len_out);
 212         *content_len = len_out;
 213         memcpy(*content_buf, buf_out, len_out);
 214         xmlFree(buf_out);
 215         xmlFreeDoc(doc);
 216         return 0;
 217     }
 218     return 0;
 219 }
 220 #endif