1 files changed, 103 insertions, 0 deletions
diff --git a/src/tool_cb_wrt.c b/src/tool_cb_wrt.c
new file mode 100644
index 000000000..3a2cd791a
--- /dev/null
+++ b/src/tool_cb_wrt.c
@@ -0,0 +1,103 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+#include "setup.h"
+
+#include <curl/curl.h>
+
+#define ENABLE_CURLX_PRINTF
+/* use our own printf() functions */
+#include "curlx.h"
+
+#include "tool_cfgable.h"
+#include "tool_msgs.h"
+#include "tool_cb_wrt.h"
+
+#include "memdebug.h" /* keep this as LAST include */
+
+/*
+** callback for CURLOPT_WRITEFUNCTION
+*/
+
+size_t tool_write_cb(void *buffer, size_t sz, size_t nmemb, void *userdata)
+{
+  size_t rc;
+  struct OutStruct *out = userdata;
+  struct Configurable *config = out->config;
+
+  /*
+   * Once that libcurl has called back tool_write_cb() the returned value
+   * is checked against the amount that was intended to be written, if
+   * it does not match then it fails with CURLE_WRITE_ERROR. So at this
+   * point returning a value different from sz*nmemb indicates failure.
+   */
+  const size_t err_rc = (sz * nmemb) ? 0 : 1;
+
+  if(!out->stream) {
+    out->bytes = 0; /* nothing written yet */
+    if(!out->filename) {
+      warnf(config, "Remote filename has no length!\n");
+      return err_rc; /* Failure */
+    }
+
+    if(config->content_disposition) {
+      /* don't overwrite existing files */
+      FILE* f = fopen(out->filename, "r");
+      if(f) {
+        fclose(f);
+        warnf(config, "Refusing to overwrite %s: %s\n", out->filename,
+              strerror(EEXIST));
+        return err_rc; /* Failure */
+      }
+    }
+
+    /* open file for writing */
+    out->stream = fopen(out->filename, "wb");
+    if(!out->stream) {
+      warnf(config, "Failed to create the file %s: %s\n", out->filename,
+            strerror(errno));
+      return err_rc; /* failure */
+    }
+  }
+
+  rc = fwrite(buffer, sz, nmemb, out->stream);
+
+  if((sz * nmemb) == rc)
+    /* we added this amount of data to the output */
+    out->bytes += (sz * nmemb);
+
+  if(config->readbusy) {
+    config->readbusy = FALSE;
+    curl_easy_pause(config->easy, CURLPAUSE_CONT);
+  }
+
+  if(config->nobuffer) {
+    /* disable output buffering */
+    int res = fflush(out->stream);
+    if(res) {
+      /* return a value that isn't the same as sz * nmemb */
+      return err_rc; /* failure */
+    }
+  }
+
+  return rc;
+}
+