libcurl通过HTTPS方式提交XML并解析响应信息

#include <stdio.h>
#include <string.h>
#include <curl/curl.h>
#include <time.h>
#include <libxml/parser.h>
#include <libxml/xmlmemory.h>
#include <libxml/xpath.h>
#include <libxml/xpathInternals.h>
static void set_prop(xmlXPathContextPtr context, const xmlChar *xpath, const xmlChar *name, const xmlChar *value){
xmlXPathObjectPtr result = xmlXPathEvalExpression(xpath, context);
if (result) {
xmlSetProp(result->nodesetval->nodeTab[0], (const xmlChar *) name, (const xmlChar *) value);
xmlXPathFreeObject (result);
}
}
static void set_value(xmlXPathContextPtr context, const xmlChar *xpath, const xmlChar *value){
xmlXPathObjectPtr result = xmlXPathEvalExpression(xpath, context);
if ( result ) {
xmlNodeSetPtr nodeset = result->nodesetval;
xmlNodeSetContent(nodeset->nodeTab[0], value);
xmlXPathFreeObject(result);
}
}
static void get_request(
char *buffer,
int *len,
const char *orderno,
const char *username,
const char *password,
const char *imsi,
const char *action,
const char *serivcename) {
xmlChar *buff;
xmlDocPtr doc;
if ( strcmp(action, "A") == 0 ) {
doc = xmlParseFile("mobb_activate.xml");
}
else if ( strcmp(action, "D") == 0 ) {
doc = xmlParseFile("mobb_cancel.xml");
}
else {
doc = xmlParseFile("mobb_status.xml");
}
if ( doc == NULL ) {
printf("xmlParseFile failed/n");
return;
}
xmlXPathContextPtr context = xmlXPathNewContext(doc);
if ( context == NULL ) {
printf("xmlXPathNewContext failed/n");
return;
}
time_t now;
struct tm ts;
char timestamp[80];
time(&now);
ts = *localtime(&now);
strftime(timestamp, sizeof(timestamp), "%Y-%m-%dT%H:%M:%S+08:00", &ts);
set_prop(context, (const xmlChar *)"//ProvisioningRequest", (const xmlChar *) "TransactionId", (const xmlChar *) orderno);
set_value(context, (const xmlChar *)"//Login", (const xmlChar *) username);
set_value(context, (const xmlChar *)"//Password", (const xmlChar *) password);
set_value(context, (const xmlChar *)"//TimeStamp", (const xmlChar *) timestamp);
set_value(context, (const xmlChar *)"//ProvisioningDataItem[@name='IMSI']", (const xmlChar *) imsi);
if ( strcmp(action, "A") == 0 ) {
set_value(context, (const xmlChar *)"//ProvisioningDataItem[@name='ServiceName']", (const xmlChar *) serivcename);
}
xmlDocDumpMemory(doc, &buff, len);
strcpy(buffer, (char *) buff);
printf("%s/n", buffer);
xmlFree(buff);
xmlXPathFreeContext(context);
xmlFreeDoc(doc);
xmlCleanupParser();
}
static size_t get_response(void *ptr, size_t size, size_t nmemb, void *stream) {
char resp[2048];
strcpy(resp, (char *) ptr);
if ( strncmp(resp, "<?xml", 5) == 0 ) {
printf("%s/n", resp);
xmlDocPtr doc = xmlParseMemory(resp, strlen(resp));
xmlXPathContextPtr context = xmlXPathNewContext(doc);
xmlXPathObjectPtr result = xmlXPathEvalExpression((const xmlChar *) "//ErrorCode", context);
if ( result ) {
xmlNodeSetPtr nodeset = result->nodesetval;
printf("MD_RT_CODE: %s/n", xmlNodeGetContent(nodeset->nodeTab[0]));
xmlXPathFreeObject(result);
}
result = xmlXPathEvalExpression((const xmlChar *) "//ErrorDescription", context);
if ( result ) {
xmlNodeSetPtr nodeset = result->nodesetval;
printf("MD_RT_MESSAGE: %s/n", xmlNodeGetContent(nodeset->nodeTab[0]));
xmlXPathFreeObject(result);
}
xmlXPathFreeContext(context);
xmlFreeDoc(doc);
}
return strlen(resp);
}
int main(int argc, char **argv) {
if ( argc < 7 || argc > 8 )  {
printf("Usage: BlackBerryProv endpoint username password orderno imsi action [servicename]/n");
exit(-1);
}
const char *action = argv[6];
if ( strcmp(action, "A") != 0 && strcmp(action, "D") != 0 && strcmp(action, "S") != 0 ) {
printf("action must be A (Activation), D (De-activation) or S (Status)/n");
exit(-1);
}
if ( strcmp(action, "A") == 0 && argc == 7 ) {
printf("service name is needed in activation/n");
exit(-1);
}
const char *endpoint = argv[1];
const char *username = argv[2];
const char *password = argv[3];
const char *orderno = argv[4];
const char *imsi = argv[5];
const char *servicename = argv[7];
char buffer[2048];
int len = 0;
get_request(buffer, &len, orderno, username, password, imsi, action, servicename);
struct curl_slist *headers = NULL;
CURL *curl = curl_easy_init();
if ( curl ) {
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
//curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
curl_easy_setopt(curl, CURLOPT_URL, endpoint);
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, buffer);
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, strlen(buffer));
curl_easy_setopt(curl, CURLOPT_POST, 1);
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_HEADER, 1);
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
if ( strcmp(action, "S") != 0 ) {
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, get_response);
}
curl_easy_perform(curl);
/* always cleanup */
curl_easy_cleanup(curl);
curl_slist_free_all(headers);
}
return 0;
}