brought back 7.5 file-upload as file-upload-multiple-posts; updated to latest API

renamed form-upload to file-upload-html-form
renamed file-upload to file-upload-single-post

examples/file-upload-multiple-posts/main.c

@@ -0,0 +1,33 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+
+#include "mongoose.h"
+
+// HTTP request handler function. It implements the following endpoints:
+//   /upload - Saves the next file chunk
+//   all other URI - serves web_root/ directory
+static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
+    if (mg_http_match_uri(hm, "/upload")) {
+      mg_http_upload(c, hm, &mg_fs_posix, "/tmp");
+    } else {
+      struct mg_http_serve_opts opts = {.root_dir = "web_root"};
+      mg_http_serve_dir(c, ev_data, &opts);
+    }
+  }
+}
+
+int main(void) {
+  struct mg_mgr mgr;
+  struct mg_timer t1;
+
+  mg_mgr_init(&mgr);
+  mg_log_set("3");
+  mg_http_listen(&mgr, "http://localhost:8000", cb, NULL);
+
+  for (;;) mg_mgr_poll(&mgr, 50);
+  mg_mgr_free(&mgr);
+
+  return 0;
+}