Initial commit

HighSlide/cloud/cos/qcloudcos/libcurl_helper.php

@@ -0,0 +1,41 @@
+<?php
+
+/**
+ * Build custom post fields for safe multipart POST request for php before 5.5.
+ * @param $fields array of key -> value fields to post.
+ * @return $boundary and encoded post fields.
+ */
+function buildCustomPostFields($fields) {
+    // invalid characters for "name" and "filename"
+    static $disallow = array("\0", "\"", "\r", "\n");
+
+    // initialize body
+    $body = array();
+
+    // build normal parameters
+    foreach ($fields as $key => $value) {
+        $key = str_replace($disallow, "_", $key);
+        $body[] = implode("\r\n", array(
+            "Content-Disposition: form-data; name=\"{$key}\"",
+            '',
+            filter_var($value),
+        ));
+    }
+
+    // generate safe boundary
+    do {
+        $boundary = "---------------------" . md5(mt_rand() . microtime());
+    } while (preg_grep("/{$boundary}/", $body));
+
+    // add boundary for each parameters
+    foreach ($body as &$part) {
+        $part = "--{$boundary}\r\n{$part}";
+    }
+    unset($part);
+
+    // add final boundary
+    $body[] = "--{$boundary}--";
+    $body[] = '';
+
+    return array($boundary, implode("\r\n", $body));
+}