src/soap.c

   1 /*
   2  * Copyright (c) 2002-2003, Index Data.
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: soap.c,v 1.3 2003-12-20 00:51:19 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_enc(ODR o, Z_SOAP **pp,
  34                  char **content_buf, int *content_len,
  35                  Z_SOAP_Handler *handlers,
  36                  const char *encoding)
  37 {
  38     if (o->direction == ODR_DECODE)
  39     {
  40         Z_SOAP *p;
  41         xmlNodePtr ptr, pptr;
  42         xmlDocPtr doc;
  43         int i, ret;
  44
  45         if (!content_buf || !*content_buf || !content_len)
  46             return -1;
  47
  48         *pp = p = (Z_SOAP *) odr_malloc(o, sizeof(*p));
  49         p->ns = soap_v1_1;
  50
  51         doc = xmlParseMemory(*content_buf, *content_len);
  52         if (!doc)
  53             return z_soap_error(o, p, "SOAP-ENV:Client",
  54                                 "Bad XML Document", 0);
  55         /* check that root node is Envelope */
  56         ptr = xmlDocGetRootElement(doc);
  57         if (!ptr || ptr->type != XML_ELEMENT_NODE ||
  58             strcmp(ptr->name, "Envelope") || !ptr->ns)
  59         {
  60             xmlFreeDoc(doc);
  61             return z_soap_error(o, p, "SOAP-ENV:Client",
  62                                 "No Envelope element", 0);
  63         }
  64         else
  65         {
  66             /* determine SOAP version */
  67             const char * ns_envelope = ptr->ns->href;
  68             if (!strcmp(ns_envelope, soap_v1_1))
  69                 p->ns = soap_v1_1;
  70             else if (!strcmp(ns_envelope, soap_v1_2))
  71                 p->ns = soap_v1_2;
  72             else
  73             {
  74                 xmlFreeDoc(doc);
  75                 return z_soap_error(o, p, "SOAP-ENV:Client",
  76                                     "Bad SOAP version", 0);
  77             }
  78         }
  79         ptr = ptr->children;
  80         while(ptr && ptr->type == XML_TEXT_NODE)
  81             ptr = ptr->next;
  82         if (ptr && ptr->type == XML_ELEMENT_NODE &&
  83             !strcmp(ptr->ns->href, p->ns) &&
  84             !strcmp(ptr->name, "Header"))
  85         {
  86             ptr = ptr->next;
  87             while(ptr && ptr->type == XML_TEXT_NODE)
  88                 ptr = ptr->next;
  89         }
  90         /* check that Body is present */
  91         if (!ptr || ptr->type != XML_ELEMENT_NODE ||
  92             strcmp(ptr->name, "Body"))
  93         {
  94             xmlFreeDoc(doc);
  95             return z_soap_error(o, p, "SOAP-ENV:Client",
  96                                 "SOAP Body element not found", 0);
  97         }
  98         if (strcmp(ptr->ns->href, p->ns))
  99         {
 100             xmlFreeDoc(doc);
 101             return z_soap_error(o, p, "SOAP-ENV:Client",
 102                                 "SOAP bad NS for Body element", 0);
 103         }
 104         pptr = ptr;
 105         ptr = ptr->children;
 106         while (ptr && ptr->type == XML_TEXT_NODE)
 107             ptr = ptr->next;
 108         if (!ptr || ptr->type != XML_ELEMENT_NODE)
 109         {
 110             xmlFreeDoc(doc);
 111             return z_soap_error(o, p, "SOAP-ENV:Client",
 112                                 "SOAP No content for Body", 0);
 113         }
 114         if (!ptr->ns)
 115         {
 116             xmlFreeDoc(doc);
 117             return z_soap_error(o, p, "SOAP-ENV:Client",
 118                                 "SOAP No namespace for content", 0);
 119         }
 120         /* check for fault package */
 121         if (!strcmp(ptr->ns->href, p->ns)
 122             && !strcmp(ptr->name, "Fault") && ptr->children)
 123         {
 124             ptr = ptr->children;
 125
 126             p->which = Z_SOAP_fault;
 127             p->u.fault = odr_malloc(o, sizeof(*p->u.fault));
 128             p->u.fault->fault_code = 0;
 129             p->u.fault->fault_string = 0;
 130             p->u.fault->details = 0;
 131             while (ptr)
 132             {
 133                 if (ptr->children && ptr->children->type == XML_TEXT_NODE)
 134                 {
 135                     if (!strcmp(ptr->name, "faultcode"))
 136                         p->u.fault->fault_code =
 137                             odr_strdup(o, ptr->children->content);
 138                     if (!strcmp(ptr->name, "faultstring"))
 139                         p->u.fault->fault_string =
 140                             odr_strdup(o, ptr->children->content);
 141                     if (!strcmp(ptr->name, "details"))
 142                         p->u.fault->details =
 143                             odr_strdup(o, ptr->children->content);
 144                 }
 145                 ptr = ptr->next;
 146             }
 147             ret = 0;
 148         }
 149         else
 150         {
 151             for (i = 0; handlers[i].ns; i++)
 152                 if (!strcmp(ptr->ns->href, handlers[i].ns))
 153                     break;
 154             if (handlers[i].ns)
 155             {
 156                 void *handler_data = 0;
 157                 ret = (*handlers[i].f)(o, pptr, &handler_data,
 158                                        handlers[i].client_data,
 159                                        handlers[i].ns);
 160                 if (ret || !handler_data)
 161                     z_soap_error(o, p, "SOAP-ENV:Client",
 162                                  "SOAP Handler returned error", 0);
 163                 else
 164                 {
 165                     p->which = Z_SOAP_generic;
 166                     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
 167                     p->u.generic->no = i;
 168                     p->u.generic->ns = handlers[i].ns;
 169                     p->u.generic->p = handler_data;
 170                 }
 171             }
 172             else
 173             {
 174                 ret = z_soap_error(o, p, "SOAP-ENV:Client",
 175                                    "No handler for NS", ptr->ns->href);
 176             }
 177         }
 178         xmlFreeDoc(doc);
 179         return ret;
 180     }
 181     else if (o->direction == ODR_ENCODE)
 182     {
 183         Z_SOAP *p = *pp;
 184         xmlNsPtr ns_env;
 185         xmlNodePtr envelope_ptr, body_ptr;
 186
 187         xmlDocPtr doc = xmlNewDoc("1.0");
 188
 189         envelope_ptr = xmlNewNode(0, "Envelope");
 190         ns_env = xmlNewNs(envelope_ptr, p->ns, "SOAP-ENV");
 191         xmlSetNs(envelope_ptr, ns_env);
 192
 193         body_ptr = xmlNewChild(envelope_ptr, ns_env, "Body", 0);
 194         xmlDocSetRootElement(doc, envelope_ptr);
 195
 196         if (p->which == Z_SOAP_fault || p->which == Z_SOAP_error)
 197         {
 198             Z_SOAP_Fault *f = p->u.fault;
 199             xmlNodePtr fault_ptr = xmlNewChild(body_ptr, ns_env, "Fault", 0);
 200             xmlNewChild(fault_ptr, ns_env, "faultcode",  f->fault_code);
 201             xmlNewChild(fault_ptr, ns_env, "faultstring", f->fault_string);
 202             if (f->details)
 203                 xmlNewChild(fault_ptr, ns_env, "details", f->details);
 204         }
 205         else if (p->which == Z_SOAP_generic)
 206         {
 207             int ret, no = p->u.generic->no;
 208
 209             ret = (*handlers[no].f)(o, body_ptr, &p->u.generic->p,
 210                                     handlers[no].client_data,
 211                                     handlers[no].ns);
 212             if (ret)
 213             {
 214                 xmlFreeDoc(doc);
 215                 return ret;
 216             }
 217         }
 218         if (p->which == Z_SOAP_generic && !strcmp(p->ns, "SRU"))
 219         {
 220             xmlDocSetRootElement(doc, body_ptr->children);
 221         }
 222         if (1)
 223         {
 224             xmlChar *buf_out;
 225             int len_out;
 226             if (encoding)
 227                 xmlDocDumpMemoryEnc(doc, &buf_out, &len_out, encoding);
 228             else
 229                 xmlDocDumpMemory(doc, &buf_out, &len_out);
 230             *content_buf = (char *) odr_malloc(o, len_out);
 231             *content_len = len_out;
 232             memcpy(*content_buf, buf_out, len_out);
 233             xmlFree(buf_out);
 234         }
 235         xmlFreeDoc(doc);
 236         return 0;
 237     }
 238     return 0;
 239 }
 240 #else
 241 int z_soap_codec_enc(ODR o, Z_SOAP **pp,
 242                      char **content_buf, int *content_len,
 243                      Z_SOAP_Handler *handlers, const char *encoding)
 244 {
 245     static char *err_xml =
 246         "<?xml version=\"1.0\"?>\n"
 247         "<SOAP-ENV:Envelope"
 248         " xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\">\n"
 249         "\t<SOAP-ENV:Body>\n"
 250         "\t\t<SOAP-ENV:Fault>\n"
 251         "\t\t\t<faultcode>SOAP-ENV:Server</faultcode>\n"
 252         "\t\t\t<faultstring>HTTP error</faultstring>\n"
 253         "\t\t\t<detail>SOAP not supported in this YAZ configuration</detail>\n"
 254         "\t\t</SOAP-ENV:Fault>\n"
 255         "\t</SOAP-ENV:Body>\n"
 256         "</SOAP-ENV:Envelope>\n";
 257     if (o->direction == ODR_ENCODE)
 258     {
 259         *content_buf = err_xml;
 260         *content_len = strlen(err_xml);
 261     }
 262     return -1;
 263 }
 264 #endif
 265 int z_soap_codec(ODR o, Z_SOAP **pp,
 266                  char **content_buf, int *content_len,
 267                  Z_SOAP_Handler *handlers)
 268 {
 269     return z_soap_codec_enc(o, pp, content_buf, content_len, handlers, 0);
 270 }
 271