Change mg_http_upload API

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

@@ -10,7 +10,14 @@ 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");
+      char path[80], name[64];
+      mg_http_get_var(&hm->query, "name", name, sizeof(name));
+      if (name[0] == '\0') {
+        mg_http_reply(c, 400, "", "%s", "name required");
+      } else {
+        mg_snprintf(path, sizeof(path), "/tmp/%s", name);
+        mg_http_upload(c, hm, &mg_fs_posix, mg_remove_double_dots(path), 99999);
+      }
     } else {
       struct mg_http_serve_opts opts = {.root_dir = "web_root"};
       mg_http_serve_dir(c, ev_data, &opts);

examples/file-upload-multiple-posts/web_root/app.js

@@ -18,12 +18,19 @@ var sendFileData = function(name, data, chunkSize) {
     var chunk = data.subarray(offset, offset + chunkSize) || '';
     var opts = {method: 'POST', body: chunk};
     var url = '/upload?offset=' + offset + '&name=' + encodeURIComponent(name);
+    var ok;
     setStatus(
-        'sending bytes ' + offset + '..' + (offset + chunk.length) + ' of ' +
-        data.length);
-    fetch(url, opts).then(function(res) {
-      if (chunk.length > 0) sendChunk(offset + chunk.length);
-    });
+        'Upoading ' + name + ', bytes ' + offset + '..' +
+        (offset + chunk.length) + ' of ' + data.length);
+    fetch(url, opts)
+        .then(function(res) {
+          if (res.ok && chunk.length > 0) sendChunk(offset + chunk.length);
+          ok = res.ok;
+          return res.text();
+        })
+        .then(function(text) {
+          if (!ok) setStatus('Error: ' + text);
+        });
   };
   sendChunk(0);
 };

examples/file-upload-multiple-posts/web_root/index.html

@@ -21,7 +21,7 @@
         in small chunks.
         <br/><br/>
         In this example, the JavaScript code on this page sends the chosen
-        file in 4K chunks using the <code>/upload</code> endpoint.
+        file in 2Kb chunks using the <code>/upload</code> endpoint.
         The uploaded file is stored in the <code>/tmp</code> directory by
         the helper API function <code>mg_http_upload()</code>
       </div>