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 <CkHashtable.h>
#include <CkStringTable.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkHashtable ht;

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

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

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

    CkStringTable keys;
    ht.GetKeys(keys);
    int numKeys = keys.get_Count();
    const char *key = 0;
    const char *val = 0;
    int i = 0;
    while (i < numKeys) {
        key = keys.stringAt(i);
        val = ht.lookupStr(key);
        std::cout << key << " = " << val << "\r\n";
        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 = ht.toQueryString();
    std::cout << qp << "\r\n";

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