Function msBuildURLFromWMSParams

mapwmslayer.c:156–210

* msBuildWMSParamsUrl() * **********************************************************************/

 *
 **********************************************************************/
static char *msBuildURLFromWMSParams(wmsParamsObj *wmsparams) 
{
    const char *key, *value;
    size_t bufferSize = 0;
    int nLen;
    char *pszURL;

    /* Compute size required for URL buffer 
     */
    nLen = strlen(wmsparams->onlineresource) + 3;

    key = msFirstKeyFromHashTable(wmsparams->params);
    while (key != NULL)
    {
        value = msLookupHashTable(wmsparams->params, key);
        nLen += strlen(key) + strlen(value) + 2;

        key = msNextKeyFromHashTable(wmsparams->params, key);
    }

    bufferSize = nLen+1;
    pszURL = (char*)msSmallMalloc(bufferSize);

    /* Start with the onlineresource value and append trailing '?' or '&' 
     * if missing.
     */
    strcpy(pszURL, wmsparams->onlineresource);
    if (strchr(pszURL, '?') == NULL)
        strcat(pszURL, "?");
    else
    {
        char *c;
        c = pszURL+strlen(pszURL)-1;
        if (*c != '?' && *c != '&')
            strcpy(c+1, "&");
    }

    /* Now add all the parameters 
     */
    nLen = strlen(pszURL);
    key = msFirstKeyFromHashTable(wmsparams->params);
    while (key != NULL)
    {
        value = msLookupHashTable(wmsparams->params, key);
        snprintf(pszURL+nLen, bufferSize-nLen, "%s=%s&", key, value);
        nLen += strlen(key) + strlen(value) + 2;
        key = msNextKeyFromHashTable(wmsparams->params, key);
    }

    /* Get rid of trailing '&'*/
    pszURL[nLen-1] = '\0';


    return pszURL;
}