1 // ============================================================================
2 // Artsoft Retro-Game Library
3 // ----------------------------------------------------------------------------
4 // (c) 1995-2021 by Artsoft Entertainment
7 // https://www.artsoft.org/
8 // ----------------------------------------------------------------------------
10 // ============================================================================
20 static char http_error[MAX_HTTP_ERROR_SIZE];
22 static void SetHttpError(char *format, ...)
27 vsnprintf(http_error, MAX_HTTP_ERROR_SIZE, format, ap);
31 char *GetHttpError(void)
36 void ConvertHttpRequestBodyToServerEncoding(struct HttpRequest *request)
38 char *body_utf8 = getUTF8FromLatin1(request->body);
40 strncpy(request->body, body_utf8, MAX_HTTP_BODY_SIZE);
41 request->body[MAX_HTTP_BODY_SIZE] = '\0';
43 checked_free(body_utf8);
46 void ConvertHttpResponseBodyToClientEncoding(struct HttpResponse *response)
48 char *body_latin1 = getLatin1FromUTF8(response->body);
50 strncpy(response->body, body_latin1, MAX_HTTP_BODY_SIZE);
51 response->body[MAX_HTTP_BODY_SIZE] = '\0';
53 response->body_size = strlen(response->body);
55 checked_free(body_latin1);
58 static void SetHttpResponseToDefaults(struct HttpResponse *response)
60 response->head[0] = '\0';
61 response->body[0] = '\0';
62 response->body_size = 0;
64 response->status_code = 0;
65 response->status_text[0] = '\0';
68 static boolean SetHTTPResponseCode(struct HttpResponse *response, char *buffer)
70 char *prefix = "HTTP/1.1 ";
71 char *prefix_start = strstr(buffer, prefix);
73 if (prefix_start == NULL)
76 char *status_code_start = prefix_start + strlen(prefix);
77 char *status_code_end = strstr(status_code_start, " ");
79 if (status_code_end == NULL)
82 int status_code_size = status_code_end - status_code_start;
84 if (status_code_size != 3) // status code must have three digits
87 char status_code[status_code_size + 1];
89 strncpy(status_code, status_code_start, status_code_size);
90 status_code[status_code_size] = '\0';
92 response->status_code = atoi(status_code);
94 char *status_text_start = status_code_end + 1;
95 char *status_text_end = strstr(status_text_start, "\r\n");
97 if (status_text_end == NULL)
100 int status_text_size = status_text_end - status_text_start;
102 if (status_text_size > MAX_HTTP_ERROR_SIZE)
105 strncpy(response->status_text, status_text_start, status_text_size);
106 response->status_text[status_text_size] = '\0';
111 static boolean SetHTTPResponseHead(struct HttpResponse *response, char *buffer)
113 char *separator = "\r\n\r\n";
114 char *separator_start = strstr(buffer, separator);
116 if (separator_start == NULL)
119 int head_size = separator_start - buffer;
121 if (head_size > MAX_HTTP_HEAD_SIZE)
124 strncpy(response->head, buffer, head_size);
125 response->head[head_size] = '\0';
130 static boolean SetHTTPResponseBody(struct HttpResponse *response, char *buffer,
133 char *separator = "\r\n\r\n";
134 char *separator_start = strstr(buffer, separator);
136 if (separator_start == NULL)
139 int separator_size = strlen(separator);
140 int full_head_size = separator_start + separator_size - buffer;
141 int body_size = buffer_size - full_head_size;
143 if (body_size > MAX_HTTP_BODY_SIZE)
146 memcpy(response->body, buffer + full_head_size, body_size);
147 response->body[body_size] = '\0';
148 response->body_size = body_size;
153 static boolean DoHttpRequestExt(struct HttpRequest *request,
154 struct HttpResponse *response,
157 int max_http_buffer_size)
159 SDLNet_SocketSet socket_set;
164 SetHttpResponseToDefaults(response);
166 socket_set = SDLNet_AllocSocketSet(1);
168 if (socket_set == NULL)
170 SetHttpError("cannot allocate socket set");
175 SDLNet_ResolveHost(&ip, request->hostname, request->port);
177 if (ip.host == INADDR_NONE)
179 SetHttpError("cannot resolve hostname '%s'", request->hostname);
184 server_host = SDLNet_Read32(&ip.host);
186 Debug("network:http", "trying to connect to server at %d.%d.%d.%d ...",
187 (server_host >> 24) & 0xff,
188 (server_host >> 16) & 0xff,
189 (server_host >> 8) & 0xff,
190 (server_host >> 0) & 0xff);
192 socket = SDLNet_TCP_Open(&ip);
196 SetHttpError("cannot connect to host '%s': %s", request->hostname,
202 if (SDLNet_TCP_AddSocket(socket_set, socket) == -1)
204 SetHttpError("cannot add socket to socket set");
209 Debug("network:http", "successfully connected to server");
211 snprintf(request->head, MAX_HTTP_HEAD_SIZE,
214 "X-Requested-With: XMLHttpRequest\r\n"
215 "Content-Type: application/json\r\n"
216 "Connection: close\r\n"
217 "Content-Length: %d\r\n",
221 (int)strlen(request->body));
223 snprintf(send_buffer, max_http_buffer_size,
224 "%s\r\n%s", request->head, request->body);
226 Debug("network:http", "client request:\n--- snip ---\n%s\n--- snip ---",
229 int send_bytes = SDLNet_TCP_Send(socket, send_buffer, strlen(send_buffer));
231 if (send_bytes != strlen(send_buffer))
233 SetHttpError("sending request to server failed");
238 int recv_bytes = SDLNet_TCP_Recv(socket, recv_buffer, max_http_buffer_size);
242 SetHttpError("receiving response from server failed");
247 recv_buffer[recv_bytes] = '\0';
249 Debug("network:http", "server response:\n--- snip ---\n%s\n--- snip ---",
252 if (!SetHTTPResponseCode(response, recv_buffer))
254 SetHttpError("malformed HTTP response");
259 if (!SetHTTPResponseHead(response, recv_buffer))
261 SetHttpError("invalid HTTP response header");
266 if (!SetHTTPResponseBody(response, recv_buffer, recv_bytes))
268 SetHttpError("invalid HTTP response body");
273 SDLNet_TCP_DelSocket(socket_set, socket);
274 SDLNet_TCP_Close(socket);
276 Debug("network:http", "server response: %d %s",
277 response->status_code,
278 response->status_text);
283 boolean DoHttpRequest(struct HttpRequest *request,
284 struct HttpResponse *response)
286 int max_http_buffer_size = MAX_HTTP_HEAD_SIZE + MAX_HTTP_BODY_SIZE;
287 char *send_buffer = checked_malloc(max_http_buffer_size + 1);
288 char *recv_buffer = checked_malloc(max_http_buffer_size + 1);
290 boolean success = DoHttpRequestExt(request, response,
291 send_buffer, recv_buffer,
292 max_http_buffer_size);
294 checked_free(send_buffer);
295 checked_free(recv_buffer);
297 runtime.use_api_server = success;