Objective-C

REST with Query Params

See more REST Examples

Demonstrates how to add query params for a REST request. Objective-C

#import <CkoRest.h>
#import <NSString.h>

BOOL success = NO;

//  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".

CkoRest *rest = [[CkoRest alloc] init];

//  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).
BOOL bTls = YES;
int port = 443;
BOOL bAutoReconnect = YES;
success = [rest Connect: @"example.com" port: [NSNumber numberWithInt: port] tls: bTls autoReconnect: 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.
NSString *responseJson = [rest FullRequestNoBody: @"GET" uriPath: @"/search?query=hello%20world&category=books&sortBy=price&filterBy=inStock"];
if (rest.LastMethodSuccess != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

//  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
[rest ClearAllQueryParams];
[rest AddQueryParams: @"query=hello%20world&category=books&sortBy=price&filterBy=inStock"];
responseJson = [rest FullRequestNoBody: @"GET" uriPath: @"/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.)
[rest ClearAllQueryParams];
[rest AddQueryParam: @"query" value: @"hello world"];
[rest AddQueryParam: @"category" value: @"books"];
[rest AddQueryParam: @"sortBy" value: @"price"];
[rest AddQueryParam: @"filterBy" value: @"inStock"];
responseJson = [rest FullRequestNoBody: @"GET" uriPath: @"/search"];
//  ...
//  ...