Added big_upload.c

e4c71425 · Sergey Lyubka · 6e07215c · e4c71425
Commit e4c71425 authored Jun 24, 2014 by Sergey Lyubka
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big_upload.c examples/big_upload.c +88 -0

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--- a/examples/big_upload.c
+++ b/examples/big_upload.c
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "mongoose.h"
+struct file_data {
+  FILE *fp;
+  const char *data;
+  int data_len;
+  int written;
+};
+static int handle_request(struct mg_connection *conn) {
+  const char *data;
+  int data_len;
+  char var_name[100], file_name[100], path[100];
+  if (strcmp(conn->uri, "/upload") == 0) {
+    if (mg_parse_multipart(conn->content, conn->content_len,
+                           var_name, sizeof(var_name),
+                           file_name, sizeof(file_name),
+                           &data, &data_len) > 0) {
+      struct file_data *p = (struct file_data *) malloc(sizeof(*p));
+      snprintf(path, sizeof(path), "UPLOAD_%s", file_name);
+      p->fp = fopen(path, "wb");
+      p->data = data;
+      p->data_len = data_len;
+      p->written = 0;
+      conn->connection_param = p;
+      mg_send_header(conn, "Content-Type", "text/html");
+    }
+    return MG_MORE;
+  } else {
+    mg_printf_data(conn, "%s",
+                   "<html><body>Upload example."
+                   "<form method=\"POST\" action=\"/upload\" "
+                   "  enctype=\"multipart/form-data\">"
+                   "<input type=\"file\" name=\"file\" /> <br/>"
+                   "<input type=\"submit\" value=\"Upload\" />"
+                   "</form></body></html>");
+    return MG_TRUE;
+  }
+}
+static int handle_poll(struct mg_connection *conn) {
+  struct file_data *p = (struct file_data *) conn->connection_param;
+  if (p != NULL) {
+    // Write no more then 100 bytes in one go
+    int len = p->data_len - p->written;
+    int n = fwrite(p->data + p->written, 1, len > 100 ? 100 : len, p->fp);
+    if (n > 0) {
+      p->written += n;
+      mg_send_data(conn, " ", 1);  // Send something back to wake up select()
+    }
+    // If everything is written, close the connection
+    if (p->written >= p->data_len) {
+      mg_printf_data(conn, "Written %d bytes.", p->written);
+      fclose(p->fp);
+      free(p);
+      conn->connection_param = NULL;
+      return MG_TRUE;
+    }
+  }
+  return MG_FALSE;
+}
+static int ev_handler(struct mg_connection *conn, enum mg_event ev) {
+  switch (ev) {
+    case MG_AUTH:     return MG_TRUE;
+    case MG_REQUEST:  return handle_request(conn);
+    case MG_POLL:     return handle_poll(conn);
+    default:          return MG_FALSE;
+  }
+}
+int main(void) {
+  struct mg_server *server = mg_create_server(NULL, ev_handler);
+  mg_set_option(server, "listening_port", "8080");
+  printf("Starting on port %s\n", mg_get_option(server, "listening_port"));
+  for (;;) {
+    mg_poll_server(server, 1000);
+  }
+  mg_destroy_server(&server);
+  return 0;
+}