Re: [xml] Segmentation fault - xmlNewDoc

["Ed Day" <eday obj-sys com>]

> Am I missing something?

 

Sure, you are only allocating strlen chars for your uid.  You need strlen + 1 to account for the null terminator char if you are using strcpy.

 

Regards,

 

Ed Day

 

----- Original Message -----

From: XML User

To: xml gnome org

Sent: Tuesday, October 07, 2003 10:24 AM

Subject: [xml] Segmentation fault - xmlNewDoc

Hi,

I am using libXml to create an xml message and pass on the message to a webserver. Since I am sending the message as part of a GET request, I remove all the new line characters from the message. For this I am using a small helper function which removes all new line characters from the message. My problem is that the program works fine the first time, however if I try to construct another xml message I get a segmentation fault. If I do not do any newline character replacements within the xml string, everything works fine.

 

Here is the function I am using

 

char* constructMessage(const char *userName,
                                  const char* responsibility)
{
  xmlDocPtr doc;
  xmlNodePtr tree, subtree,subsubtree;
  xmlChar* Message;
  int size;
  char* uid;

  uid = (char*)malloc(strlen(userName)*sizeof(char));
  strcpy(uid,userName);
  encodeData(&uid);

  /*construct Message */
  doc = xmlNewDoc("1.0");
  doc->children = xmlNewDocNode(doc, NULL, "Message", NULL);
  xmlSetProp(doc->children,"MessageId","");
  xmlSetProp(doc->children,"IntObjectFormat","Hierarchical");
  xmlSetProp(doc->children,"MessageType","Integration Object");
  xmlSetProp(doc->children,"IntObjectName","User Registration");
  tree = xmlNewChild(doc->children, NULL, "Start_UserRegistration", NULL)
  subtree = xmlNewChild(tree, NULL, "UserRegistration", NULL);
  subsubtree = xmlNewChild(subtree, NULL, "FirstName", uid);
  subsubtree = xmlNewChild(subtree, NULL, "LastName", uid);
  subsubtree = xmlNewChild(subtree, NULL, "LoginName", uid);
  subsubtree = xmlNewChild(subtree, NULL, "ListOfUserRegistration_Responsibilit
", NULL);
  tree = subsubtree;
  subtree = xmlNewChild(tree, NULL, "UserRegistration_Responsibility", NULL);
  subsubtree = xmlNewChild(subtree, NULL, "Responsibility", responsibility);
  xmlDocDumpMemory(doc,&Message,&size);

/*helper function*/

 replaceChar(&Message,"\n","");
 replaceChar(&Message," ","%20");

  xmlFreeDoc(doc);
  free(uid);
  return (char*)Message;
}

 

Am I missing something?

 

Thanks,

Akshay.

 

 

 

 

 

 

 

 

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