C

Keeping Query Params in a Hashtable

Demonstrates how to use a Chilkat Hashtable to hold query params and re-emit as a query param string.

Note: The ToQueryString method was added in Chilkat v9.5.0.92.

C

#include <C_CkHashtable.h>
#include <C_CkStringTable.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHashtable ht;
    const char *qp;
    HCkStringTable keys;
    int numKeys;
    const char *key;
    const char *val;
    int i;

    success = FALSE;

    ht = CkHashtable_Create();

    //  Add name/value pairs from an existing query param string where the values are already URL encoded.
    qp = "txt=this%20is%20a%20test&color=blue&fruits=apples%26oranges";
    success = CkHashtable_AddQueryParams(ht,qp);

    //  Add some additional name/value pairs.
    CkHashtable_AddStr(ht,"name","Jack Sparrow");
    CkHashtable_AddStr(ht,"movie","Pirates of the Carribean");

    //  Iterate over the hash table to show what we have..

    keys = CkStringTable_Create();
    CkHashtable_GetKeys(ht,keys);
    numKeys = CkStringTable_getCount(keys);

    i = 0;
    while (i < numKeys) {
        key = CkStringTable_stringAt(keys,i);
        val = CkHashtable_lookupStr(ht,key);
        printf("%s = %s\n",key,val);
        i = i + 1;
    }

    //  Output for the above loop:

    //  color = blue
    //  name = Jack Sparrow
    //  fruits = apples&oranges
    //  txt = this is a test
    //  movie = Pirates of the Carribean

    //  Get all name/value pairs as a query parm string with values URL encoded
    qp = CkHashtable_toQueryString(ht);
    printf("%s\n",qp);

    //  Result:
    //  color=blue&name=Jack%20Sparrow&fruits=apples%26oranges&txt=this%20is%20a%20test&movie=Pirates%20of%20the%20Carribean


    CkHashtable_Dispose(ht);
    CkStringTable_Dispose(keys);

    }