Add iron_http_request for linux

base/sources/backends/posix_net.c

@@ -0,0 +1,72 @@
+#include <iron_net.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <openssl/ssl.h>
+
+static SSL_CTX *ctx = NULL;
+static char *buf = NULL;
+static int buf_len = 1024 * 1024;
+
+void iron_http_request(const char *url, const char *path, const char *data, int port, bool secure, int method, const char *header,
+					   iron_http_callback_t callback, void *callbackdata) {
+
+	int sock_fd = socket(AF_INET, SOCK_STREAM, 0);
+	struct hostent *server = gethostbyname(url);
+	struct sockaddr_in server_addr = {0};
+	server_addr.sin_family = AF_INET;
+	memmove(&server_addr.sin_addr.s_addr, server->h_addr_list[0], server->h_length);
+	server_addr.sin_port = htons(port);
+
+	if (connect(sock_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
+		close(sock_fd);
+		callback(1, 0, NULL, callbackdata);
+		return;
+	}
+
+	if (ctx == NULL) {
+		ctx = SSL_CTX_new(TLS_client_method());
+	}
+
+	SSL *ssl = SSL_new(ctx);
+	SSL_set_fd(ssl, sock_fd);
+
+	if (SSL_connect(ssl) <= 0) {
+		SSL_free(ssl);
+		close(sock_fd);
+		callback(1, 0, NULL, callbackdata);
+		return;
+	}
+
+	// For HTTP/1.1, implement "transfer-encoding: chunked"
+	char request[1024];
+	int request_len = snprintf(request, sizeof(request), "GET /%s HTTP/1.0\r\nHost: %s:%d\r\nConnection: close\r\n\r\n", path, url, port);
+	SSL_write(ssl, request, request_len);
+
+	// Read
+	if (buf == NULL) {
+		buf = malloc(buf_len);
+	}
+	int pos = 0;
+	int n;
+	while ((n = SSL_read(ssl, buf + pos, buf_len - pos - 1)) > 0) {
+		pos += n;
+		if (pos == buf_len - 1) {
+			buf_len *= 2;
+			buf = realloc(buf, buf_len);
+		}
+	}
+
+	// Parse
+	int status_code = 0;
+	const char *body_ptr = "";
+	char *headers_end = strstr(buf, "\r\n\r\n");
+	body_ptr = headers_end + 4;
+	callback(0, status_code, body_ptr, callbackdata);
+
+	SSL_free(ssl);
+	close(sock_fd);
+}