// Copyright (c) 2015 Cesanta Software Limited // All rights reserved // // This example demonstrates how to handle very large requests without keeping // them in memory. #include #include #include #include "mongoose.h" static const char *s_http_port = "8000"; struct file_writer_data { FILE *fp; size_t bytes_written; }; static void handle_request(struct mg_connection *nc) { // This handler gets for all endpoints but /upload mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\n" "Content-Type: text/html\r\n" "Connection: close\r\n" "\r\n" "Upload example." ""); nc->flags |= MG_F_SEND_AND_CLOSE; } static void handle_upload(struct mg_connection *nc, int ev, void *p) { struct file_writer_data *data = (struct file_writer_data *) nc->user_data; struct mg_http_multipart_part *mp = (struct mg_http_multipart_part *) p; switch (ev) { case MG_EV_HTTP_PART_BEGIN: { if (data == NULL) { data = calloc(1, sizeof(struct file_writer_data)); data->fp = tmpfile(); data->bytes_written = 0; if (data->fp == NULL) { mg_printf(nc, "%s", "HTTP/1.1 500 Failed to open a file\r\n" "Content-Length: 0\r\n\r\n"); nc->flags |= MG_F_SEND_AND_CLOSE; return; } nc->user_data = (void *) data; } break; } case MG_EV_HTTP_PART_DATA: { if (fwrite(mp->data.p, 1, mp->data.len, data->fp) != mp->data.len) { mg_printf(nc, "%s", "HTTP/1.1 500 Failed to write to a file\r\n" "Content-Length: 0\r\n\r\n"); nc->flags |= MG_F_SEND_AND_CLOSE; return; } data->bytes_written += mp->data.len; break; } case MG_EV_HTTP_PART_END: { mg_printf(nc, "HTTP/1.1 200 OK\r\n" "Content-Type: text/plain\r\n" "Connection: close\r\n\r\n" "Written %ld of POST data to a temp file\n\n", (long) ftell(data->fp)); nc->flags |= MG_F_SEND_AND_CLOSE; fclose(data->fp); free(data); nc->user_data = NULL; break; } } } static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) { (void) ev_data; switch (ev) { case MG_EV_HTTP_REQUEST: // Invoked when the full HTTP request is in the buffer (including body). handle_request(nc); break; } } int main(void) { struct mg_mgr mgr; struct mg_connection *nc; mg_mgr_init(&mgr, NULL); nc = mg_bind(&mgr, s_http_port, ev_handler); mg_register_http_endpoint(nc, "/upload", handle_upload); // Set up HTTP server parameters mg_set_protocol_http_websocket(nc); printf("Starting web server on port %s\n", s_http_port); for (;;) { mg_mgr_poll(&mgr, 1000); } mg_mgr_free(&mgr); return 0; }