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#ifndef CALPACA_HTTP_H
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#define CALPACA_HTTP_H
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include "auth.h"
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#include <json-c/json.h>
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void init_openssl()
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{
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SSL_load_error_strings();
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OpenSSL_add_ssl_algorithms();
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}
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void cleanup_openssl()
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{
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EVP_cleanup();
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}
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SSL_CTX *create_context()
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{
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const SSL_METHOD *method = TLS_method();
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SSL_CTX *ctx = SSL_CTX_new(method);
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SSL_CTX_load_verify_locations(ctx, "/etc/ssl/certs/ca-certificates.crt", NULL);
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return ctx;
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}
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SSL_CTX *create_context2()
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{
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const SSL_METHOD *method;
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SSL_CTX *ctx;
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method = TLS_client_method();
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ctx = SSL_CTX_new(method);
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if (!ctx)
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{
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perror("Unable to create SSL context");
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ERR_print_errors_fp(stderr);
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exit(EXIT_FAILURE);
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}
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return ctx;
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}
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int create_socket(const char *hostname, int port)
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{
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struct hostent *host;
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struct sockaddr_in addr;
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host = gethostbyname(hostname);
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if (!host)
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{
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perror("Unable to resolve host");
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exit(EXIT_FAILURE);
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}
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int sock = socket(AF_INET, SOCK_STREAM, 0);
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if (sock < 0)
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{
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perror("Unable to create socket");
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exit(EXIT_FAILURE);
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}
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addr.sin_family = AF_INET;
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addr.sin_port = htons(port);
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addr.sin_addr.s_addr = *(long *)(host->h_addr);
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if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) != 0)
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{
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perror("Unable to connect to host");
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close(sock);
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exit(EXIT_FAILURE);
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}
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return sock;
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}
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char *http_post(const char *hostname, char *url, char *data)
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{
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init_openssl();
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int port = 443;
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SSL_CTX *ctx = create_context();
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int sock = create_socket(hostname, port);
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SSL *ssl = SSL_new(ctx);
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SSL_set_connect_state(ssl);
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SSL_set_tlsext_host_name(ssl, hostname);
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SSL_set_fd(ssl, sock);
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int buffer_size = 4096;
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char *buffer = (char *)malloc(buffer_size);
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if (SSL_connect(ssl) <= 0)
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{
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ERR_print_errors_fp(stderr);
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}
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else
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{
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size_t len = strlen(data);
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char *request = (char *)malloc(len + 4096);
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request[0] = 0;
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sprintf(request,
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"POST %s HTTP/1.1\r\n"
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"Content-Length: %ld\r\n"
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"Content-Type: application/json\r\n"
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"Host: api.openai.com\r\n"
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"Authorization: Bearer %s\r\n"
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"Connection: close\r\n\r\n%s",
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url, len, api_key, data);
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SSL_write(ssl, request, strlen(request));
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free(request);
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int bytes;
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int bytes_total = 0;
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while ((bytes = SSL_read(ssl, buffer + bytes_total, buffer_size - 1)) > 0)
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{
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if (bytes <= 0)
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{
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break;
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}
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bytes_total += bytes;
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buffer = realloc(buffer, bytes_total + buffer_size);
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buffer[bytes_total] = '\0';
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}
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buffer[bytes_total] = '\0';
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}
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SSL_free(ssl);
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close(sock);
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SSL_CTX_free(ctx);
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cleanup_openssl();
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return buffer;
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}
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char *http_get(const char *hostname, char *url)
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{
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init_openssl();
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int port = 443;
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SSL_CTX *ctx = create_context();
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int sock = create_socket(hostname, port);
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SSL *ssl = SSL_new(ctx);
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SSL_set_connect_state(ssl);
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SSL_set_tlsext_host_name(ssl, hostname);
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SSL_set_fd(ssl, sock);
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int buffer_size = 4096;
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char *buffer = (char *)malloc(buffer_size * sizeof(char));
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if (SSL_connect(ssl) <= 0)
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{
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ERR_print_errors_fp(stderr);
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}
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else
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{
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char request[buffer_size];
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request[0] = 0;
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sprintf(request,
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"GET %s HTTP/1.1\r\n"
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"Host: api.openai.com\r\n"
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"Authorization: Bearer %s\r\n"
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"Connection: close\r\n\r\n",
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url, api_key);
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SSL_write(ssl, request, strlen(request));
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int bytes;
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int bytes_total = 0;
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while ((bytes = SSL_read(ssl, buffer + bytes_total, buffer_size - 1)) > 0)
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{
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if (bytes <= 0)
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{
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break;
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}
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bytes_total += bytes;
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buffer = realloc(buffer, bytes_total + buffer_size);
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buffer[bytes_total] = '\0';
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}
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}
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SSL_free(ssl);
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close(sock);
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SSL_CTX_free(ctx);
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cleanup_openssl();
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return buffer;
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}
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#endif |