Web-Client/requests.c at main · andreitulpan/Web-Client · GitHub

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#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include "helpers.h"
#include "requests.h"

char *compute_get_request(char *host, char *url, char *query_params,
                            char **cookies, int cookies_count, char *token)
{
    char *message = calloc(BUFLEN, sizeof(char));
    char *line = calloc(LINELEN, sizeof(char));

    if (query_params != NULL) {
        sprintf(line, "GET %s?%s HTTP/1.1", url, query_params);
    } else {
        sprintf(line, "GET %s HTTP/1.1", url);
    }

    compute_message(message, line);

    memset(line, 0, LINELEN);
    sprintf(line, "Host: %s", host);
    compute_message(message, line);

    if (token != NULL) {
        memset(line, 0, LINELEN);
        strcat(line, "Authorization: ");
        strcat(line, "Bearer ");
        strcat(line, token);
        compute_message(message,line);
    }

    if (cookies != NULL) {
        memset(line, 0, LINELEN);
        strcat(line, "Cookie: ");

        for (int i = 0; i < cookies_count - 1; i++) {
            strcat(line, cookies[i]);
            strcat(line, ";");
        }

        strcat(line, cookies[cookies_count - 1]);
        compute_message(message, line);
    }

    free(line);
    compute_message(message, "");
    return message;
}

char *compute_delete_request(char *host, char *url, char *query_params,
                            char **cookies, int cookies_count, char *token)
{
    char *message = calloc(BUFLEN, sizeof(char));
    char *line = calloc(LINELEN, sizeof(char));

    // Step 1: write the method name, URL, request params (if any) and protocol type
    if (query_params != NULL) {
        sprintf(line, "DELETE %s?%s HTTP/1.1", url, query_params);
    } else {
        sprintf(line, "DELETE %s HTTP/1.1", url);
    }

    compute_message(message, line);

    // Step 2: add the host
    memset(line, 0, LINELEN);
    sprintf(line, "Host: %s", host);
    compute_message(message, line);

   // Step 3.1 (optional): add authorization
    if (token != NULL) {
        memset(line, 0, LINELEN);
        strcat(line, "Authorization: ");
        strcat(line, "Bearer ");
        strcat(line, token);
        compute_message(message,line);
    }

    // Step 3.2 (optional): add cookies
    if (cookies != NULL) {
        memset(line, 0, LINELEN);
        strcat(line, "Cookie: ");

        for (int i = 0; i < cookies_count - 1; i++) {
            strcat(line, cookies[i]);
            strcat(line, ";");
        }

        strcat(line, cookies[cookies_count - 1]);
        compute_message(message, line);
    }

    free(line);
    compute_message(message, "");
    return message;
}

char *compute_post_request(char *host, char *url, char* content_type, char **body_data,
                            int body_data_fields_count, char **cookies, int cookies_count, char *token)
{
    char *message = calloc(BUFLEN, sizeof(char));
    char *line = calloc(LINELEN, sizeof(char));
    char *body_data_buffer = calloc(LINELEN, sizeof(char));

    // Step 1: write the method name, URL and protocol type
    sprintf(line, "POST %s HTTP/1.1", url);
    compute_message(message, line);

    // Step 2: add the host
    memset(line, 0, LINELEN);
    sprintf(line, "Host: %s", host);
    compute_message(message, line);

    // Step 3: add necessary headers (Content-Type and Content-Length are mandatory)
    int body_data_size = 0;
    for (int i = 0; i < body_data_fields_count - 1; i++) {
        strcat(body_data_buffer, body_data[i]);
        strcat(body_data_buffer, "&");
        body_data_size += strlen(body_data[i]);
        body_data_size++; //for '&
    }

    strcat(body_data_buffer, body_data[body_data_fields_count - 1]);
    body_data_size += strlen(body_data[body_data_fields_count - 1]);

    sprintf(line, "Content-Type: %s\r\nContent-Length: %d", content_type, body_data_size);
    compute_message(message, line);

    // Step 4.1 (optional): add authorization
    if (token != NULL) {
        memset(line, 0, LINELEN);
        strcat(line, "Authorization: ");
        strcat(line, "Bearer ");
        strcat(line, token);
        compute_message(message,line);
    }

    // Step 4.2 (optional): add cookies
    if (cookies != NULL) {
        memset(line, 0, LINELEN);
        strcat(line, "Cookie: ");

        for (int i = 0; i < cookies_count - 1; i++) {
            strcat(line, cookies[i]);
            strcat(line, ";");
        }

        strcat(line, cookies[cookies_count - 1]);
        compute_message(message,line);
    }

    // Step 5: add new line at end of header
    compute_message(message, "");

    // Step 6: add data
    memset(line, 0, LINELEN);
    strcat(message, body_data_buffer);
    free(body_data_buffer);
    free(line);
    return message;
}