headers.c

Demonstrates functions from header.h

 
#include <stdio.h>
#include <stdlib.h>
 
#include <limits.h>
 
#include <winyl/winyl.h>
#include <winyl/request.h>
#include <winyl/header.h>
 
int main(int argc, char* argv[]) {
    winyl host = winyl_open("postman-echo.com", 80);
    
    if (host.error != 0) {
        // We don't handle errors properly here,
        // please see basic.c for proper error handling.
        printf("Error code %d\n", host.error);
 
        winyl_close(&host);
        exit(1);
    }
 
    // add a header
    winyl_add_header(&host, "Accept-Language", "*");
 
    // check its value
    printf("Accept-Language value: %s\n", winyl_get_header_value(&host, "Accept-Language"));
 
    // overwrite its value
    winyl_add_header(&host, "Accept-Language", "en");
 
    // check its value... again
    printf("Updated Accept-Language value: %s\n", winyl_get_header_value(&host, "Accept-Language"));
 
    // remove it from the requst
    winyl_remove_header(&host, "Accept-Language");
 
    // check its presence (for demonstration purposes only,
    // you don't have to do this after winyl_remove_header call)
    printf("Is it present? %s\n", winyl_has_header(&host, "Accept-Language") == -1 ? "No" : "Yes");
 
    // add a different header, with a "dynamic value",
    // to show that libwinyl clones the input string and that it can be safely freed
    
    // create a string from INT_MAX
    // WINYL_INTLEN is used here only for convenience,
    // please note that it only handles positive integers
    char* value = malloc(WINYL_INTLEN(INT_MAX) + 1);
    sprintf(value, "%d", INT_MAX);
 
    // made up header name
    winyl_add_header(&host, "X-INT-MAX", value);
    free(value);
 
    winyl_response res = winyl_request(&host, "/get", 0);
    if (res.error != 0) {
        printf("Error code %d\n", res.error);
 
        winyl_response_close(&res);
        winyl_close(&host);
        exit(1);
    }
 
    // check if header is present
    printf("Is Content-Type present? %s\n", winyl_has_header2(&res, "Content-Type") == -1 ? "No" : "Yes");
 
    // check and print header value
    if (winyl_has_header2(&res, "Content-Type") != -1) {
        printf("Value of Content-Type: %s\n", winyl_get_header_value2(&res, "Content-Type"));
    }
 
    printf("Body:\n%s\n", res.body);
 
    winyl_response_close(&res);
    winyl_close(&host);
    exit(0);
}