Tcl

REST with Query Params

See more REST Examples

Demonstrates how to add query params for a REST request. Tcl

load ./chilkat.dll

set success 0

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# Let's say we want to send a GET request to 
# https://example.com/search?query=hello%20world&category=books&sortBy=price&filterBy=inStock

# Notice that the query parameter values must be URL encoded.

# Let's also explain the parts of the above URL:

#     Scheme: https
#         The scheme specifies the protocol used to access the resource. 
#         In this case, it is "https," which indicates that the resource is accessed using the Hypertext Transfer Protocol Secure (HTTPS).
# 
#     Host: example.com
#         The host part of the URL identifies the domain name or IP address of the server hosting the resource. In this case, "example.com" is the host.
# 
#     Path: /search
#         The path is the specific location or resource on the server that the client wants to access. 
#         In this URL, the path is "/search," indicating that the client is requesting the "search" resource on the server.
# 
#     Query Parameters:
#         Query parameters are used to send additional data to the server as key-value pairs. 
#         They are separated from the path by a question mark ? and each parameter is separated by an ampersand &.
# 
#         The above URL has four query parameters:
#             query=hello%20world: The "query" parameter with the value "hello world". The %20 represents the URL-encoded space character in the value.
#             category=books: The "category" parameter with the value "books".
#             sortBy=price: The "sortBy" parameter with the value "price".
#             filterBy=inStock: The "filterBy" parameter with the value "inStock".

set rest [new_CkRest]

# Connect to the REST server.

# The Host part of the URL is passed in the 1st argument.
# The Scheme part of the URL ("https") is indicated by the 2nd and 3rd arguments (port and bTls).
set bTls 1
set port 443
set bAutoReconnect 1
set success [CkRest_Connect $rest "example.com" $port $bTls $bAutoReconnect]

# There are 3 ways to send the above GET request.

# 1) Send the request with path and query params pre-built, where the query param values are URL encoded.
set responseJson [CkRest_fullRequestNoBody $rest "GET" "/search?query=hello%20world&category=books&sortBy=price&filterBy=inStock"]
if {[CkRest_get_LastMethodSuccess $rest] != 1} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    exit
}

# 2) Pass only the Path part of the URL, and specify the query params separately by calling AddQueryParams beforehand.
#    Again, the query params must be already URL encoded when passed to AddQueryParams
CkRest_ClearAllQueryParams $rest
CkRest_AddQueryParams $rest "query=hello%20world&category=books&sortBy=price&filterBy=inStock"
set responseJson [CkRest_fullRequestNoBody $rest "GET" "/search"]
# ...
# ...

# 3) Pass each query parameter separately by calling AddQueryParam.  In this case, the query param value should be passed without URL encoding.
#    (ClearAllQueryParams ensures any params set for previous request are cleared.)
CkRest_ClearAllQueryParams $rest
CkRest_AddQueryParam $rest "query" "hello world"
CkRest_AddQueryParam $rest "category" "books"
CkRest_AddQueryParam $rest "sortBy" "price"
CkRest_AddQueryParam $rest "filterBy" "inStock"
set responseJson [CkRest_fullRequestNoBody $rest "GET" "/search"]
# ...
# ...

delete_CkRest $rest